MycLib/KI/FMX_Intf.txt

// Combined interfaces from directories:
// - C:\Program Files (x86)\Embarcadero\Studio\23.0\source\fmx (recursive)
// Focus mode (-fx) active for files: T:\Myc\ASTPlayground\MainForm.pas
// Generated on: 07.10.2025 11:01:41

uses
  system.actions,
  system.analytics,
  system.character,
  system.classes,
  system.devices,
  system.generics.collections,
  system.generics.defaults,
  system.imagelist,
  system.math,
  system.math.vectors,
  system.messaging,
  system.rtti,
  system.strutils,
  system.sysutils,
  system.types,
  system.typinfo,
  system.uiconsts,
  system.uitypes,
  winapi.messages;

//==================================================================================================
//== INTERFACE START: FMX.ActnList (from FMX.ActnList.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  /// <summary>Interface used by the framework to access an action in a
  /// class.</summary>
  IActionClient = interface
    ['{4CAAFEEE-73ED-4C4B-8413-8BF1C3FFD777}']
    /// <summary> The root component. This is usually a form on which the control which supports this interface is placed.
    /// This function is used by framework</summary>
    /// <returns> Instance of component that supports IRoot interface </returns>
    function GetRoot: TComponent;
    /// <summary> This method is used by the framework to determine that an instance of object which supports this
    /// interface is used when working with actions. See also <b>InitiateAction</b>. If returns <c>False</c> then the
    /// instance will be ignored</summary>
    /// <returns> The value set using the method <b>SetActionClient</b> </returns>
    function GetActionClient: Boolean;
    /// <summary> This method sets value that the <b>GetActionClient</b> function returns </summary>
    procedure SetActionClient(const Value: Boolean);
    function GetAction: TBasicAction;
    procedure SetAction(const Value: TBasicAction);
    /// <summary> When the framework performs periodical execution of <b>InitiateAction</b>, it invokes the controls in
    /// order defined by this index</summary>
    function GetIndex: Integer;
    /// <summary> Calls the action link's <b>Update</b> method if the instance is associated with an action link
    /// </summary>
    procedure InitiateAction;
    /// <summary> Action associated with this instance </summary>
    property Action: TBasicAction read GetAction write SetAction;
  end;

  /// <summary>The IIsChecked interface provides access to the IsChecked
  /// property for controls that can be checked.</summary>
  IIsChecked = interface
    ['{DE946EB7-0A6F-4458-AEB0-C911122630D0}']
    function GetIsChecked: Boolean;
    procedure SetIsChecked(const Value: Boolean);
    /// <summary> Determines whether the <b>IsChecked</b> property needs to be stored in the fmx-file </summary>
    /// <returns> <c>True</c> if <b>IsChecked</b> property needs to be stored, usually if it contains non default value
    /// </returns>
    function IsCheckedStored: Boolean;
    /// <summary> <c>True</c> if the control is in the ON state </summary>
    property IsChecked: Boolean read GetIsChecked write SetIsChecked;
  end;

  /// <summary>The IGroupName interface provides access to the GroupName
  /// property for controls that need to provide exclusive checking inside a
  /// group.</summary>
  IGroupName = interface(IIsChecked)
    ['{F5C14792-67AB-41F2-99C1-90C7F94102EE}']
    function GetGroupName: string;
    procedure SetGroupName(const Value: string);
    /// <summary> <c>True</c> if <b>GroupName</b> property should be stored</summary>
    /// <returns> <c>True</c> if <b>GroupName</b> property needs to be stored, usually if it contains non default
    /// (<c>''</c>, <c>'0'</c>, <c>'-1'</c>) value </returns>
    function GroupNameStored: Boolean;
    /// <summary> Name of the control group </summary>
    property GroupName: string read GetGroupName write SetGroupName;
  end;

  /// <summary>Interface used to access the Shortcut property of some
  /// classes.</summary>
  IKeyShortcut = interface
    ['{1AE6E932-9291-4BCD-93D1-DDD2A3E09394}']
    function GetShortcut: TShortcut;
    procedure SetShortcut(const Value: TShortcut);
    /// <summary> The combination of hot keys that the class should handle </summary>
    property Shortcut: TShortcut read GetShortcut write SetShortcut;
  end;

  /// <summary>If an object supports the ICaption interface, when the text of
  /// the object changes, the Text must also be changed.</summary>
  ICaption = interface
    ['{3D039C9C-8888-466F-A344-E7026EEE2C07}']
    function GetText: string;
    procedure SetText(const Value: string);
    /// <summary> If this function returns true, the text should be save in the fmx-file. </summary>
    function TextStored: Boolean;
    /// <summary> This property is used to changed the display text. </summary>
    property Text: string read GetText write SetText;
  end;

  /// <summary>Declares basic methods and properties used to manage lists of
  /// images.</summary>
  IGlyph = interface
  ['{62BDCA4F-820A-4058-B57A-FE8931DB3CCC}']
    function GetImageIndex: TImageIndex;
    procedure SetImageIndex(const Value: TImageIndex);
    function GetImages: TBaseImageList;
    procedure SetImages(const Value: TBaseImageList);
    ///<summary> Should be called when you change an instance or reference to instance of <b>TBaseImageList</b> or the
    /// <b>ImageIndex</b> property</summary>
    procedure ImagesChanged;
    ///<summary> Zero based index of an image. The default is <c>-1</c></summary>
    ///<remarks> If non-existing index is specified, an image is not drawn and no exception is raised</remarks>
    property ImageIndex: TImageIndex read GetImageIndex write SetImageIndex;
    ///<summary> The list of images. Can be <c>nil</c></summary>
    property Images: TBaseImageList read GetImages write SetImages;
  end;

  TCustomActionList = class(TContainedActionList)
  private
    FImageLink: TImageLink;
    procedure SetImages(const Value: TBaseImageList);
    function GetImages: TBaseImageList;
  protected
    ///<summary> Should be called when you change an instance or reference to instance of <b>TBaseImageList</b> or the
    /// <b>ImageIndex</b> property</summary>
    procedure ImagesChanged; virtual;
  public
    destructor Destroy; override;
    function DialogKey(const Key: Word; const Shift: TShiftState): Boolean; virtual;
    ///<summary> The list of images. Can be <c>nil</c></summary>
    property Images: TBaseImageList read GetImages write SetImages;
  end;

  TActionList = class(TCustomActionList)
  published
    property Name;
    property Images;
    property State;
    property OnChange;
    property OnExecute;
    property OnStateChange;
    property OnUpdate;
  end;

  TActionLink = class(TContainedActionLink)
  private
    [Weak] FClient: TObject;
    FIsViewActionClient: Boolean;
    [Weak] FImages: TBaseImageList;
    FGlyph: IGlyph;
    FCaption: ICaption;
    FChecked: IIsChecked;
    FGroupName: IGroupName;
    procedure UpdateImages(const AImageListLinked: Boolean);
  protected
    procedure AssignClient(AClient: TObject); override;
    procedure SetAction(Value: TBasicAction); override;
    function IsCaptionLinked: Boolean; override;
    function IsCheckedLinked: Boolean; override;
    function IsEnabledLinked: Boolean; override;
    function IsGroupIndexLinked: Boolean; override;
    function IsOnExecuteLinked: Boolean; override;
    function IsShortCutLinked: Boolean; override;
    function IsVisibleLinked: Boolean; override;
    function IsImageIndexLinked: Boolean; override;
    procedure SetCaption(const Value: string); override;
    procedure SetChecked(Value: Boolean); override;
    procedure SetGroupIndex(Value: Integer); override;
    procedure SetImageIndex(Value: Integer); override;
    procedure Change; override;
    /// <summary> Reference to <b>IGlyph</b> interface of <b>Client</b>. <c>Nil</c> if <b>Client</b> is undefined or
    /// does not support this interface </summary>
    property Glyph: IGlyph read FGlyph;
  public
    function IsHelpContextLinked: Boolean; override;
    function IsViewActionClient: Boolean;
    property Client: TObject read FClient;
    ///<summary> The list of images. Can be <c>nil</c></summary>
    property Images: TBaseImageList read FImages;
    property CaptionLinked: Boolean read IsCaptionLinked;
    /// <summary> Same as <b>IsHintLinked</b> </summary>
    property HintLinked: Boolean read IsHintLinked;
    property CheckedLinked: Boolean read IsCheckedLinked;
    property EnabledLinked: Boolean read IsEnabledLinked;
    property GroupIndexLinked: Boolean read IsGroupIndexLinked;
    property ShortCutLinked: Boolean read IsShortCutLinked;
    property VisibleLinked: Boolean read IsVisibleLinked;
    property OnExecuteLinked: Boolean read IsOnExecuteLinked;
  end;

  TActionLinkClass = class of TActionLink;

  TShortCutList = class(TCustomShortCutList)
  public
    function Add(const S: string): Integer; override;
  end;

  TCustomAction = class(TContainedAction)
  private
    FShortCutPressed: Boolean;
    [Weak] FTarget: TComponent;
    FUnsupportedArchitectures: TArchitectures;
    FUnsupportedPlatforms: TPlatforms;
    FOldVisible: Boolean;
    FOldEnabled: Boolean;
    FSupported: Boolean;
    FCustomText: string;
    FSupportedChecked: Boolean;
    FHideIfUnsupportedInterface: Boolean;
    function GetText: string; inline;
    procedure SetText(const Value: string); inline;
    function GetCustomActionList: TCustomActionList;
    procedure SetCustomActionList(const Value: TCustomActionList);
    procedure ReaderCaptionProc(Reader: TReader);
    procedure WriterCaptionProc(Writer: TWriter);
    procedure ReaderImageIndexProc(Reader: TReader);
    procedure WriterImageIndexProc(Writer: TWriter);
    procedure SetUnsupportedArchitectures(const Value: TArchitectures);
    procedure SetUnsupportedPlatforms(const Value: TPlatforms);
    procedure SetCustomText(const Value: string);
    procedure SetHideIfUnsupportedInterface(const Value: Boolean);
  protected
    procedure UpdateSupported;
    function IsSupportedInterface: Boolean; virtual;
    function CreateShortCutList: TCustomShortCutList; override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure SetTarget(const Value: TComponent); virtual;
    procedure SetEnabled(Value: Boolean); override;
    procedure SetVisible(Value: Boolean); override;
    procedure Loaded; override;
    procedure CustomTextChanged; virtual;
    property CustomText: string read FCustomText write SetCustomText;
  public
    constructor Create(AOwner: TComponent); override;
    function Execute: Boolean; override;
    function Update: Boolean; override;
    function IsDialogKey(const Key: Word; const Shift: TShiftState): Boolean;
    property Text: string read GetText write SetText;
    property Caption stored false;
    property ActionList: TCustomActionList read GetCustomActionList write SetCustomActionList;
    property HideIfUnsupportedInterface: Boolean read FHideIfUnsupportedInterface write SetHideIfUnsupportedInterface;
    property ShortCutPressed: Boolean read FShortCutPressed write FShortCutPressed;
    property Target: TComponent read FTarget write SetTarget;
    property UnsupportedArchitectures: TArchitectures read FUnsupportedArchitectures write SetUnsupportedArchitectures
      default [];
    property UnsupportedPlatforms: TPlatforms read FUnsupportedPlatforms write SetUnsupportedPlatforms default [];
    property Supported: Boolean read FSupported;
  end;

{ TCustomViewAction }

  TOnCreateComponent = procedure (Sender: TObject; var NewComponent: TComponent) of object;
  TOnBeforeShow = procedure (Sender: TObject; var CanShow: Boolean) of object;

  TCustomViewAction = class(TCustomAction)
  private
    [Weak] FComponent: TComponent;
    FOnCreateComponent: TonCreateComponent;
    FOnAfterShow: TNotifyEvent;
    FOnBeforeShow: TOnBeforeShow;
  protected
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
    procedure DoCreateComponent(var NewComponent: TComponent); virtual;
    procedure DoBeforeShow(var CanShow: Boolean); virtual;
    procedure DoAfterShow; virtual;
    function ComponentText: string; virtual;
    procedure ComponentChanged; virtual;
    procedure SetComponent(const Value: TComponent); virtual;
    property OnCreateComponent: TOnCreateComponent read FOnCreateComponent write FonCreateComponent;
    property OnBeforeShow: TOnBeforeShow read FOnBeforeShow write FOnBeforeShow;
    property OnAfterShow: TNotifyEvent read FOnAfterShow write FOnAfterShow;
  public
    function HandlesTarget(Target: TObject): Boolean; override;
    property Component: TComponent read FComponent write SetComponent;
  end;

  /// <summary>TAction is the base class for FireMonkey action objects. TAction
  /// and descendant classes implement actions to be used with controls, menu
  /// items, and tool buttons. The published properties and events of TAction
  /// actions can be managed in the Object Inspector at design time.</summary>
  TAction = class(TCustomAction)
  public
    constructor Create(AOwner: TComponent); override;
  published
    property AutoCheck;
    property Text;
    property Checked;
    property Enabled;
    property GroupIndex;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property ImageIndex;
    property ShortCut default 0;
    property SecondaryShortCuts;
    property Visible;
    property UnsupportedArchitectures;
    property UnsupportedPlatforms;
    property OnExecute;
    property OnUpdate;
    property OnHint;
  end;

function TextToShortCut(const AText: string): Integer;

//== INTERFACE END: FMX.ActnList
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Presentation.Messages (from FMX.Presentation.Messages.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type

{ TMessageSender }

  /// <summary>ID of message</summary>
  TMessageID = Word;

  /// <summary>Record type that represents a message with value for <c>TMessageSender</c>.</summary>
  TDispatchMessageWithValue<T> = record
    MsgID: TMessageID;
    Value: T;
  public
    constructor Create(const AMessageID: TMessageID; const AValue: T);
  end;

  /// <summary>Class to allow sending message notifications to a TObject <c>Receiver</c>.</summary>
  TMessageSender = class(TPersistent)
  private
    FReceiver: TObject;
    FNeedFreeReceiver: Boolean;
    FCanNotify: Integer;
    procedure SetReceiver(const Value: TObject);
  protected
    /// <summary>Creates and returns the Receiver object of the message. By default returns nil.</summary>
    function CreateReceiver: TObject; virtual;
    /// <summary>Frees the Receiver, if receiver was created by <c>CreateReceiver</c>.</summary>
    procedure FreeReceiver; virtual;
  public
    constructor Create; overload; virtual;
    destructor Destroy; override;
    /// <summary>Returns whether <c>TMessageSender</c> has a Receiver or not.</summary>
    function HasReceiver: Boolean;
    { Sending Messages }
    /// <summary>Sends a message to an object.</summary>
    procedure SendMessage(const AMessageID: TMessageID); overload;
    /// <summary>Sends a message with value to an object.</summary>
    procedure SendMessage<T>(const AMessageID: TMessageID; const AValue: T); overload;
    /// <summary>Sends a message with value to an object and allows to get result from <c>Receiver</c>.</summary>
    procedure SendMessageWithResult<T>(const AMessageID: TMessageID; var AValue: T);
    { Notifications }
    /// <summary>Disables <c>TMessageSender</c> from sending messages.</summary>
    procedure DisableNotify; virtual;
    /// <summary>Enables <c>TMessageSender</c> to send messages. Use CanNotify to check whether TMessageSender can send
    /// messages.</summary>
    /// <remarks>The model reads quantity of calls of <c>DisableNotify</c>. So all calls of <c>DisableNotify</c> and
    /// <c>EnableNotify</c>shall be pairs.</remarks>
    procedure EnableNotify; virtual;
    /// <summary>Returns whether <c>TMessageSender</c> can send messages.</summary>
    function CanNotify: Boolean; virtual;
  public
    /// <summary>Returns the object that receives the message.</summary>
    property Receiver: TObject read FReceiver write SetReceiver;
  end;

  IMessageSendingCompatible = interface
  ['{7777134E-CEC9-40F6-9AAA-CE4D6F55001A}']
    /// <summary>Return link to TMessageSender object</summary>
    function GetMessageSender: TMessageSender;
    /// <summary>Link to TMessageSender object that can be used to send messages</summary>
    property MessageSender: TMessageSender read GetMessageSender;
  end;

  /// <summary>Interface allows access to TMessageSender object</summary>
  IMessageSender = interface(IMessageSendingCompatible)
  ['{64DD751B-91F5-4767-994F-2787E21ABEF2}']
  end deprecated 'Use IMessageSendingCompatible';

//== INTERFACE END: FMX.Presentation.Messages
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Consts (from FMX.Consts.pas)
//==================================================================================================

{$SCOPEDENUMS ON}

const
  StyleDescriptionName = 'Description';        // do not localize
  SMainItemStyle = 'menubaritemstyle';         // do not localize
  SSeparatorStyle = 'menuseparatorstyle';      // do not localize

  SMenuBarDisplayName = 'Menu Bar';            // do not localize
  SMenuAppDisplayName = 'Menu Application';    // do not localize

  SBMPImageExtension = '.bmp';                 // do not localize
  SJPGImageExtension = '.jpg';                 // do not localize
  SJPEGImageExtension = '.jpeg';               // do not localize
  SJP2ImageExtension = '.jp2';
  SPNGImageExtension = '.png';                 // do not localize
  SGIFImageExtension = '.gif';                 // do not localize
  STIFImageExtension = '.tif';                 // do not localize
  STIFFImageExtension = '.tiff';               // do not localize
  SICOImageExtension = '.ico';                 // do not localize
  SHDPImageExtension = '.hdp';                 // do not localize
  SWMPImageExtension = '.wmp';                 // do not localize
  STGAImageExtension = '.tga';                 // do not localize
  SICNSImageExtension = '.icns';               // do not localize

  // Keys for TPlatformServices.GlobalFlags
  GlobalDisableStylusGestures: string = 'GlobalDisableStylusGestures'; // do not localize
  EnableGlassFPSWorkaround: string = 'EnableGlassFPSWorkaround'; // do not localize

  FormUseDefaultPosition: Integer = -1; // same as CW_USEDEFAULT = DWORD($80000000)
  CommandQShortCut = 4177;

resourcestring

  { Error Strings }
  SInvalidPrinterOp       = 'Operation not supported on selected printer';
  SInvalidPrinter         = 'Selected printer is not valid';
  SPrinterIndexError      = 'Printer index out of range';
  SDeviceOnPort           = '%s on %s';
  SNoDefaultPrinter       = 'There is no default printer currently selected';
  SNotPrinting            = 'Printer is not currently printing';
  SPrinting               = 'Printing in progress';
  SInvalidPrinterSettings = 'Invalid printing job settings';
  SInvalidPageFormat      = 'Invalid page format settings';
  SCantStartPrintJob      = 'Cannot start the printing job';
  SCantEndPrintJob        = 'Cannot end the printing job';
  SCantPrintNewPage       = 'Cannot add the page for printing';
  SCantSetNumCopies       = 'Cannot change the number of document copies';
  StrCannotFocus          = 'Cannot focus this control';
  SResultCanNotBeNil      = 'The function ''%s'' must not return nil value';
  SKeyAcceleratorConflict = 'There was an accelerator key conflict';

  SInvalidStyleForPlatform = 'The style you have chosen is not available for your currently selected target platform. You can select a custom style or remove the stylebook to allow FireMonkey to automatically load the native style at run time';
  SCannotLoadStyleFromStream = 'Cannot load style from stream';
  SCannotLoadStyleFromRes = 'Cannot load style from resource';
  SCannotLoadStyleFromFile = 'Cannot load style from file %s';
  SCannotChangeInLiveBinding = 'Cannot change this property when using LiveBindings';

  SInvalidPrinterClass    = 'Invalid printer class: %s';
  SPromptArrayTooShort    = 'Length of value array must be >= length of prompt array';
  SPromptArrayEmpty       = 'Prompt array must not be empty';
  SUnsupportedInputQuery  = 'Unsupported InputQuery fields';
  SInvalidColorString     = 'Invalid Color string';

  SInvalidFmxHandle = 'Invalid FMX Handle: %s%.*x';
  SInvalidFmxHandleClass = 'Invalid handle. [%s] should be instance of [%s]';
  SDelayRelease = 'At the moment, you cannot change the window handle';
  SMediaGlobalError  = 'Cannot create media control';
  SMediaFileNotSupported  = 'Unsupported media file %s%';
  SMediaCannotUseAutofocus = 'Camera cannot work with autofocus. Error="%s"';
  SUnsupportedPlatformService = 'Unsupported platform service: %s';
  SServiceAlreadyRegistered = 'Service %s already registered';
  SUnsupportedOSVersion = 'Unsupported OS version: %s';
  SUnsupportedMultiInstance = 'An instance of "%s" already exists. Multiple instances are not supported';
  SNotInstance = 'Instance of "%s" not created';
  SFlasherNotRegistered = 'Class of flashing control is not registered';
  SUnsupportedInterface = 'Class %0:s does not support interface %1:s';
  SNullException = 'Handled null exception';
  SCannotGetDeviceIDForTestAds = 'Unable to obtain device ID. Use SetTestModeDeviceID.';
  SCannotCreateTimer = 'Cannot create timer: systemErrorCode=%d';

  SErrorShortCut = 'An unknown combination of keys %s';
  SEUseHeirs = 'You can use only the inheritors of class "%s"';

  SUnavailableMenuId = 'Cannot create menu ID. All IDs have already been assigned';

  SInvalidGestureID = 'Invalid gesture ID (%d)';
  SInvalidStreamFormat = 'Invalid stream format';
  SDuplicateGestureName = 'Duplicate gesture name: %s';
  SDuplicateRecordedGestureName = 'A recorded gesture named %s already exists';
  SControlNotFound = 'Control not found';
  SRegisteredGestureNotFound = 'The following registered gestures were not found:' + sLinebreak + sLinebreak + '%s';
  SErrorLoadingFile = 'Error loading previously saved settings file: %s' + sLinebreak + 'Would you like to delete it?';
  STooManyRegisteredGestures = 'Too many registered gestures';
  SDuplicateRegisteredGestureName = 'A registered gesture named %s already exists';
  SUnableToSaveSettings = 'Unable to save settings';
  SInvalidGestureName = 'Invalid gesture name (%s)';
  SOutOfRange = 'Value must be between %d and %d';

  SAddIStylusAsyncPluginError = 'Unable to add IStylusAsyncPlugin: %s';
  SAddIStylusSyncPluginError = 'Unable to add IStylusSyncPlugin: %s';
  SRemoveIStylusAsyncPluginError = 'Unable to remove IStylusAsyncPlugin: %s';
  SRemoveIStylusSyncPluginError = 'Unable to remove IStylusSyncPlugin: %s';
  SStylusHandleError = 'Unable to get or set window handle: %s';
  SStylusEnableError = 'Unable to enable or disable IRealTimeStylus: %s';
  SEnableRecognizerError = 'Unable to enable or disable IGestureRecognizer: %s';
  SInitialGesturePointError = 'Unable to retrieve initial gesture point';
  SSetStylusGestureError = 'Unable to set stylus gestures: %s';
  StrESingleMainMenu = 'The main menu can be only a single instance';
  SMainMenuSupportsOnlyTMenuItems = 'A main menu only supports TMenuItem children';

  SNoImplementation = 'No %s implementation found';
  SNotImplementedOnPlatform = '%s not implemented on this platform';
  {$IFDEF ANDROID}
  SInputQueryAndroidOverloads = 'On Android platform, only overloads with TInputCloseBoxProc or TInputCloseBoxEvent ' +
    'are supported';
  {$ENDIF}

  SBitmapSizeNotEqual = 'Bitmap size must be equal in copy operation';
  SBitmapCannotChangeCanvasQuality = 'Cannot change bitmap canvas quality, when canvas is already being used.';

  SBlockingDialogs = 'Blocking dialogs';

  SCannotCreateScrollContent = 'Cannot create %s, because |CreateScrollContent| must return not nil object';
  SContentCannotBeNil = 'Presentation received nil Content from TPresentedControl. Content cannot be nil.';

  SPointInTextLayoutError = 'Point not in layout';
  SCaretLineIncorrect = 'TCaretPosition.Line has incorrect value';
  SCaretPosIncorrect = 'TCaretPosition.Pos has incorrect value';

  SInvalidSceneUpdatingPairCall = 'Invalid IScene.DisableUpdating/IScene.EnableUpdating call pair';

  SNoPlatformStyle = 'No platform styles found'; // happens when there are no platform styles at all
  SInvalidPlatformStyle = 'No platform style found for the current platform'; // happens when there are platform styles, just not the right ones
  SNoIDeviceBehaviorBehavior = 'Required IDeviceBehavior is not registered';
  SStyleResourceDoesNotExist = 'Style resource does not exist';

  SDialogMustBeRunInUIThread = 'Messages must be shown in the main UI thread.';
  SObjectNonMainThreadUsage = '''%s'' is used on a not main thread';

  { Dialog Strings }
  SMsgDlgWarning = 'Warning';
  SMsgDlgError = 'Error';
  SMsgDlgInformation = 'Information';
  SMsgDlgConfirm = 'Confirm';
  SMsgDlgYes = 'Yes';
  SMsgDlgNo = 'No';
  SMsgDlgOK = 'OK';
  SMsgDlgCancel = 'Cancel';
  SMsgDlgHelp = 'Help';
  SMsgDlgHelpNone = 'No help available';
  SMsgDlgHelpHelp = 'Help';
  SMsgDlgAbort = 'Abort';
  SMsgDlgRetry = 'Retry';
  SMsgDlgIgnore = 'Ignore';
  SMsgDlgAll = 'All';
  SMsgDlgNoToAll = 'No to All';
  SMsgDlgYesToAll = 'Yes to &All';
  SMsgDlgClose = 'Close';

  SWindowsVistaRequired = '%s requires Windows Vista or later';

  SUsername = '&Username';
  SPassword = '&Password';
  SDomain = '&Domain';
  SLogin = 'Login';
  SHostRequiresAuthentication = '%s requires authentication';

  {$IF DEFINED(MACOS) and not DEFINED(IOS)}
  SAlertCreatedReleasedInconsistency = 'Platform AlertCreated/AlertReleased inconsistency';
  {$ENDIF}

  { Menus }
  SMenuAppQuit = 'Quit %s';
  SMenuCloseWindow = 'Close Window';
  SMenuAppHide = 'Hide %s';
  SMenuAppHideOthers = 'Hide Others';
  SMenuServices = 'Services';
  SMenuShowAll = 'Show All';
  SMenuWindow = 'Window';
  SAppDesign = '<Application.Title>';
  SAppDefault = 'application';
  SGotoTab = 'Go to %s';
  SGotoNilTab = 'Go to <Tab>';
  SMediaPlayerStart = 'Play';
  SMediaPlayerPause = 'Pause';
  SMediaPlayerStop = 'Stop';
  SMediaPlayerVolume = '%3.0F %%';

  SMsgGooglePlayServicesNeedUpdating = 'Google Play Services needs to be updated. Please go to Play Store to update '
    + ' Google Play Services then, restart the application';
const
  SChrHorizontalEllipsis = Chr($2026);
{$IFDEF MACOS}
  SmkcBkSp = Chr($232B); // (NSBackspaceCharacter);
  SmkcTab = Chr($21E5); // (NSTabCharacter);
  SmkcEsc = Chr($238B);
  SmkcEnter = Chr($21A9); // (NSCarriageReturnCharacter);
  SmkcPgUp = Chr($21DE); // (NSPageUpFunctionKey);
  SmkcPgDn = Chr($21DF); // (NSPageDownFunctionKey);
  SmkcEnd = Chr($2198); // (NSEndFunctionKey);
  SmkcDel = Chr($2326); // (NSDeleteCharacter);
  SmkcHome = Chr($2196); // (NSHomeFunctionKey);
  SmkcLeft = Chr($2190); // (NSLeftArrowFunctionKey);
  SmkcUp = Chr($2191); // (NSUpArrowFunctionKey);
  SmkcRight = Chr($2192); // (NSRightArrowFunctionKey);
  SmkcDown = Chr($2193); // (NSDownArrowFunctionKey);
  SmkcNumLock = Chr($2327);
  SmkcPara = Chr($00A7);
  SmkcShift = Chr($21E7);
  SmkcCtrl = Chr($2303);
  SmkcAlt = Chr($2325);
  SmkcCmd = Chr($2318);
  // Specific keys for OSX
  SmkcBacktab= Chr($21E4);
  SmkcIbLeft= Chr($21E0);
  SmkcIbUp= Chr($21E1);
  SmkcIbRight= Chr($21E2);
  SmkcIbDown= Chr($21E3);
  SmkcIbEnter= Chr($2305);
  SmkcIbHelp= Chr($225F);
{$ELSE}
  SmkcBkSp = 'BkSp';
  SmkcTab = 'Tab';
  SmkcEsc = 'Esc';
  SmkcEnter = 'Enter';
  SmkcPgUp = 'PgUp';
  SmkcPgDn = 'PgDn';
  SmkcEnd = 'End';
  SmkcDel = 'Del';
  SmkcHome = 'Home';
  SmkcLeft = 'Left';
  SmkcUp = 'Up';
  SmkcRight = 'Right';
  SmkcDown = 'Down';
  SmkcNumLock = 'Num Lock';
  SmkcPara = 'Paragraph';
  SmkcShift = 'Shift+';
  SmkcCtrl = 'Ctrl+';
  SmkcAlt = 'Alt+';
  SmkcCmd = 'Cmd+';

  SmkcLWin = 'Left Win';
  SmkcRWin = 'Right Win';
  SmkcApps = 'Application';
  SmkcClear = 'Clear';
  SmkcScroll = 'Scroll Lock';
  SmkcCancel = 'Break';
  SmkcLShift = 'Left Shift';
  SmkcRShift = 'Right Shift';
  SmkcLControl = 'Left Ctrl';
  SmkcRControl = 'Right Ctrl';
  SmkcLMenu = 'Left Alt';
  SmkcRMenu = 'Right Alt';
  SmkcCapital = 'Caps Lock';
{$ENDIF}
  SmkcOem102 = 'Oem \';
  SmkcSpace = 'Space';
  SmkcNext = 'Next';
  SmkcBack = 'Back';
  SmkcIns = 'Ins';
  SmkcPause = 'Pause';
  SmkcCamera = 'Camera';
  SmkcBrowserBack= 'BrowserBack';
  SmkcHardwareBack= 'HardwareBack';
  SmkcNum = 'Num %s';

resourcestring
  SEditUndo = 'Undo';
  SEditRedo = 'Redo';
  SEditCopy = 'Copy';
  SEditCut = 'Cut';
  SEditPaste = 'Paste';
  SEditDelete = 'Delete';
  SEditSelectAll = 'Select All';

  SAseLexerTokenError = 'ERROR at line %d. %s expected but token %s found.';
  SAseLexerCharError = 'ERROR at line %d. ''%s'' expected but char ''%s'' found.';
  SAseLexerFileCorruption = 'File is corrupt.';

  SAseParserWrongMaterialsNumError = 'Wrong materials number';
  SAseParserWrongVertexNumError = 'Wrong vertex number';
  SAseParserWrongNormalNumError = 'Wrong normal number';
  SAseParserWrongTexCoordNumError = 'Wrong texture coord number';
  SAseParserWrongVertexIdxError = 'Wrong vertex index';
  SAseParserWrongFacesNumError = 'Wrong faces number';
  SAseParserWrongFacesIdxError = 'Wrong faces index';
  SAseParserWrongTriangleMeshNumError = 'Wrong triangle mesh number';
  SAseParserWrongTriangleMeshIdxError = 'Wrong triangle mesh index';
  SAseParserWrongTexCoordIdxError = 'Wrong texture coord index';
  SAseParserUnexpectedKyWordError = 'Unexpected key word';

  SIndexDataNotFoundError = 'Index data not found. File is corrupt.';
  SEffectIdNotFoundError = 'Effect id %s not found. File is corrupt.';
  SMeshIdNotFoundError = 'Mesh id %s not found. File is corrupt.';
  SControllerIdNotFoundError = 'Controller id %s not found. File is corrupt.';

  SCannotCreateCircularDependence = 'Cannot create a circular dependency between components';
  SPropertyOutOfRange = '%s property out of range';

  SPrinterDPIChangeError = 'Active printer DPI cannot be changed while printing';
  SPrinterSettingsReadError = 'Error occurred while reading printer settings: %s';
  SPrinterSettingsWriteError = 'Error occurred while writing printer settings: %s';

  SVAllFiles = 'All Files';
  SVBitmaps = 'Bitmaps';
  SVIcons = 'Icons';
  SVTIFFImages = 'TIFF Images'; 
  SVJPGImages = 'JPEG Images';
  SVPNGImages = 'PNG Images';
  SVGIFImages = 'GIF Images';
  SVJP2Images = 'Jpeg 2000 Images';
  SVTGAImages = 'TGA Images';
  SWMPImages = 'WMP Images';

  SVAviFiles = 'AVI Files';
  SVWMVFiles = 'WMV Files';
  SVMP4Files = 'Mpeg4 Files';
  SVMOVFiles = 'QuickTime Files';
  SVM4VFiles = 'M4V Files';
  SVMPGFiles = 'Mpeg Files';

  SVWMAFiles = 'Windows Media Audio Files';
  SVMP3Files = 'Mpeg Layer 3 Files';
  SVWAVFiles = 'WAV Files';
  SVCAFFiles = 'Apple Core Audio Format Files';
  SV3GPFiles = '3GP Audio Files';
  SVM4AFiles = 'M4A Files';

  SAllFilesExt = '.*';
  SDefault = 'All Files';

  StrEChangeFixed  = 'The "%s" cannot be modified (Fixed = True)';
  StrEDupScale     = 'Duplicate scale value %s';
  StrOther         = 'Other scale';
  StrScale1        = 'Normal';
  StrScale2        = 'Hi Res';

  SCodecFileExtensionCannotEmpty = 'Cannot register bitmap codec. Codec file extension cannot be empty.';
  SCodecClassCannotBeNil = 'Cannot register bitmap codec. Codec class cannot be nil.';
  SCodecAlreadyExists = 'Cannot register bitmap codec. Codec for specified file extension "%s" has already existed.';

  SAnimatedCodecAlreadyExists = 'Cannot register animated codec. An animated codec for the specified file extension "%s" already exists.';
  SAnimatedCodecFramesSizeNotEqual = 'Cannot add a frame to the animated codec. The size of the frames must be equal.';

  SFilterAlreadyExists = 'Cannot register filter. A filter with the same name "%s" already exists.';

  { Media }

  SNoFlashError = 'Flash does not exist on this device';
  SNoTorchError = 'Flash does not exist on this device';

  { Pickers }
  SPickerCancel = 'Cancel';
  SPickerDone   = 'Done';
  SEditorDone   = 'Done';
  SListPickerIsNotFound = 'This version of Android does not have an implementation of list pickers';
  SDateTimePickerIsNotFound = 'This version of Android does not have an implementation of Date/Time pickers';

  { Notification Center }
  SNotificationCancel = 'Cancel';
  SNotificationCenterTitleIsNotSupported = 'NotificationCenter: Title is not supported in iOS';
  SNotificationCenterActionIsNotSupported = 'NotificationCenter: Action is not supported in Android';

  { Media Library }
  STakePhotoFromCamera = 'Take Photo';
  STakePhotoFromLibarary = 'Photo Library';
  SOpenStandartServices = 'Open to';
  SSavedPhotoAlbum = 'Saved Photos';
  SImageSaved = 'Image saved';
  SCannotConvertBitmapToNative = 'Cannot convert FMX bitmap to its native counterpart';

  { Canvas helpers / 2D and 3D engine / GPU }
  SBitmapIncorrectSize = 'Incorrect size of bitmap parameter(s).';
  SBitmapLoadingFailed = 'Loading bitmap failed.';
  SBitmapLoadingFailedNamed = 'Loading bitmap failed (%s).';
  SBitmapSizeTooBig = 'Bitmap size too big.';
  SInvalidCanvasParameter = 'Invalid call of GetParameter.';
  SThumbnailLoadingFailed = 'Loading thumbnail failed.';
  SThumbnailLoadingFailedNamed = 'Loading thumbnail failed (%s).';
  SBitmapSavingFailed = 'Saving bitmap failed.';
  SBitmapSavingFailedNamed = 'Saving bitmap failed (%s).';
  SBitmapFormatUnsupported = 'The specified bitmap format is not supported.';
  SRetrieveSurfaceDescription = 'Could not retrieve surface description.';
  SRetrieveSurfaceContents = 'Could not retrieve surface contents.';
  SAcquireBitmapAccess = 'Failed acquiring access to bitmap.';
  SVideoCaptureFault = 'Failure during video feed capture.';
  SNoCaptureDeviceManager = 'No CaptureDeviceManager implementation found';
  SAudioCaptureUnauthorized = 'Unauthorized to record audio';
  SVideoCaptureUnauthorized = 'Unauthorized to record video';
  SInvalidCallingConditions = 'Invalid calling conditions for ''%s''.';
  SInvalidRenderingConditions = 'Invalid rendering conditions for ''%s''.';
  STextureSizeTooSmall = 'Cannot create texture for ''%s'' because the size is too small.';
  SCannotAcquireBitmapAccess = 'Cannot acquire bitmap access for ''%s''.';
  SCannotFindSuitablePixelFormat = 'Cannot find a suitable pixel format for ''%s''.';
  SCannotFindSuitableShader = 'Cannot find a suitable shader for ''%s''.';
  SCannotDetermineDirect3DLevel = 'Cannot determine Direct3D support level.';
  SCannotCreateDirect3D = 'Cannot create Direct3D object for ''%s''.';
  SCannotCreateD2DFactory = 'Cannot create Direct2D Factory object for ''%s''.';
  SCannotCreateDWriteFactory = 'Cannot create DirectWrite Factory object for ''%s''.';
  SCannotCreateWICImagingFactory = 'Cannot create WIC Imaging Factory object for ''%s''.';
  SCannotCreateRenderTarget = 'Cannot create rendering target for ''%s''.';
  SCannotCreateD3DDevice = 'Cannot create Direct3D device for ''%s''.';
  SCannotAcquireDXGIFactory = 'Cannot acquire DXGI factory from Direct3D device for ''%s''.';
  SCannotResizeBuffers = 'Cannot resize buffers for ''%s''.';
  SCannotAssociateWindowHandle = 'Cannot associate the window handle for ''%s''.';
  SCannotRetrieveDisplayMode = 'Cannot retrieve display mode for ''%s''.';
  SCannotRetrieveBufferDesc = 'Cannot retrieve buffer description for ''%s''.';
  SCannotCreateSamplerState = 'Cannot create sampler state for ''%s''.';
  SCannotRetrieveSurface = 'Cannot retrieve surface for ''%s''.';
  SCannotCreateTexture = 'Cannot create texture for ''%s''.';
  SCannotUploadTexture = 'Cannot upload pixel data to texture for ''%s''.';
  SCannotActivateTexture = 'Cannot activate the texture for ''%s''.';
  SCannotAcquireTextureAccess = 'Cannot acquire texture access for ''%s''.';
  SCannotCopyTextureResource = 'Cannot copy texture resource ''%s''.';
  SCannotCreateRenderTargetView = 'Cannot create render target view for ''%s''.';
  SCannotActivateFrameBuffers = 'Cannot activate frame buffers for ''%s''.';
  SCannotCreateRenderBuffers = 'Cannot create render buffers for ''%s''.';
  SCannotRetrieveRenderBuffers = 'Cannot retrieve device render buffers for ''%s''.';
  SCannotActivateRenderBuffers = 'Cannot activate render buffers for ''%s''.';
  SCannotBeginRenderingScene = 'Cannot begin rendering scene for ''%s''.';
  SCannotSyncDeviceBuffers = 'Cannot synchronize device buffers for ''%s''.';
  SCannotUploadDeviceBuffers = 'Cannot upload device buffers for ''%s''.';
  SCannotCreateDepthStencil = 'Cannot create a depth/stencil buffer for ''%s''.';
  SCannotRetrieveDepthStencil = 'Cannot retrieve device depth/stencil buffer for ''%s''.';
  SCannotActivateDepthStencil = 'Cannot activate depth/stencil buffer for ''%s''.';
  SCannotCreateSwapChain = 'Cannot create a swap chain for ''%s''.';
  SCannotResizeSwapChain = 'Cannot resize swap chain for ''%s''.';
  SCannotActivateSwapChain = 'Cannot activate swap chain for ''%s''.';
  SCannotCreateVertexShader = 'Cannot create vertex shader for ''%s''.';
  SCannotCreatePixelShader = 'Cannot create pixel shader for ''%s''.';
  SCannotCreateVertexLayout = 'Cannot create vertex layout for ''%s''.';
  SCannotCreateVertexDeclaration = 'Cannot create vertex declaration for ''%s''.';
  SCannotCreateVertexBuffer = 'Cannot create vertex buffer for ''%s''.';
  SCannotCreateIndexBuffer = 'Cannot create index buffer for ''%s''.';
  SCannotCreateShader = 'Cannot create shader for ''%s''.';
  SCannotFindShaderVariable = 'Cannot find shader variable ''%s''.';
  SCannotActivateShaderProgram = 'Cannot activate shader program for ''%s''.';
  SCannotCreateMetalContext = 'Cannot create Metal context for ''%s''.';
  SCannotCreateOpenGLContext = 'Cannot create OpenGL context for ''%s''.';
  SCannotCreateOpenGLContextWithCode = 'Cannot create OpenGL context for ''%s''. Error code: %d.';
  SCannotCreatePBufferSurfaceWithCode = 'Cannot create EGL PBuffer Surface. Error code: %d.';
  SCannotUpdateOpenGLContext = 'Cannot update OpenGL context for ''%s''.';
  SOpenGLErrorFlag = '[OpenGL] Checking the value of the OpenGL error stack returned an error : code=(%d, "%s")';
  SOpenGLCannotCreateDummyContext = '[OpenGL] cannot create dummy context for loading extensions list.';
  SCannotDrawMeshObject = 'Cannot draw mesh object for ''%s''.';
  SErrorInContextMethod = 'Error in context: method=''%s''.';
  SFeatureNotSupported = 'This feature is not supported in ''%s''.';
  SErrorCompressingStream = 'Error compressing stream.';
  SErrorDecompressingStream = 'Error decompressing stream.';
  SErrorUnpackingShaderCode = 'Error unpacking shader code.';
  SCannotPaintOnCanvasWithoutBeginScene = 'It is not possible to perform rendering. BeginScene was not invoked.';
  SCannotRunDirectShowFilterGraph = 'One or more DirectShow filters failed to run';
  SCannotCreateDirectShowCaptureFilter = 'Cannot create the DirectShow capture filter';

  SCannotAddFixedSize = 'Cannot add columns or rows when ExpandStyle is TExpandStyle.FixedSize';
  SInvalidSpan = '''%d'' is not a valid span';
  SInvalidRowIndex = 'Row index, %d, out of bounds';
  SInvalidColumnIndex = 'Column index, %d, out of bounds';
  SInvalidControlItem = 'ControlItem.Control cannot be set to owning GridPanel';
  SCannotDeleteColumn = 'Cannot delete a column that contains controls';
  SCannotDeleteDefColumn = 'You cannot delete a column by default';
  SCannotDeleteRow = 'Cannot delete a row that contains controls';
  SCellMember = 'Member';
  SCellSizeType = 'Size Type';
  SCellValue = 'Value';
  SCellAutoSize = 'Auto';
  SCellPercentSize = 'Percent';
  SCellAbsoluteSize = 'Absolute';
  SCellWeightSize = 'Weight';
  SCellColumn = 'Column%d';
  SCellRow = 'Row%d';

  SDateTimeMax = 'Date exceeds maximum of "%s"';
  SDateTimeMin = 'Date is less than minimum of "%s"';

  SDateTimePickerShowModeNotSupported = 'DateTime picker does not support DateTime on current platform';

  SMediaLibraryOpenImageWith = 'Send image using:';
  SMediaLibraryOpenTextWith = 'Send text using:';
  SMediaLibraryOpenFilesWith = 'Send files using:';
  SMediaLibraryOpenTextAndImageWith = 'Send text/image using:';
  SMediaLibraryOpenTextAndFilesWith = 'Send text/files using:';

  SNativePresentation = 'Native %s';

  { In-App Purchase }
  SIAPNotSetup = 'In-App Purchase component is not set up';
  SIAPNoLicenseKey = 'In-App Purchase component has no license key';
  SIAPPayloadVerificationFailed = 'Transaction payload verification failed';
  SIAPAlreadyPurchased = 'Item has already been purchased';
  SIAPNotAlreadyPurchased = 'Cannot consume an item you have not purchased';
  SIAPSetupProblem = 'Problem setting up in-app billing';
  SIAPIllegalArguments = 'Argument problem in IAP API';
  SITunesConnectionError = 'Cannot connect to iTunes Store';
  SProductsRequestInProgress = 'Products request already in progress';
  SIAPProductNotInInventory = 'Product ID %s is not valid';

  { Advertising }
  SAdFailedToLoadError = 'Ad failed to load: %d';

  { TMultiView }
  SCannotCreatePresentation = 'You cannot create Presentation without MultiView';
  SDrawer = 'Drawer';
  SOverlapDrawer = 'Overlap Drawer';
  SDockedPanel = 'Docked Panel';
  SPopover = 'Popover';
  SNavigationPane = 'Navigation Pane';
  SObjectCannotBeChild = '"%0:s" of "%1:s" cannot be a child control of "%1:s" or the "%1:s" itself';

  { Presentations }
  SWrongModelClassType = 'Model is not valid class. Expected [%s], but received [%s]';
  SWrongParameter = '[%] parameter cannot be nil';
  SControlWithoutPresentation = '[%s] without Presentation';
  SControlClassIsNil = 'AControlClass cannot be nil. Factory cannot generate presentation name.';
  SPresentationProxyCreateError = 'Cannot create presentation proxy with nil model or PresentedControl. ' +
    'Use overloaded version of constructor with parameters and pass correct values.';
  SPresentationProxyClassNotFound = 'Presentation Proxy class for presentation name [%s] is not found';
  SPresentationProxyClassIsNil = 'APresentationProxyClass is nil. Factory cannot register presentation with a nil presentation proxy class.';
  SPresentationProxyNameIsEmpty = 'APresentationName is empty. Factory cannot register presentation with an empty presentation name';
  SPresentationAlreadyRegistered = 'Presentation Proxy class [%s] for this presentation name [%s] has already been registered.';
  SPresentationTitleInDesignTime = '%s (%s)';
  SProxyIsNotRegisteredWarning = 'A descendant of TStyledPresentationProxy has not been registered for class %s.' + sLineBreak +
    'Maybe it is necessary to add the %s module to the uses section';
  { TScrollBox }
  SScrollBoxOwnerWrong = '|AOwner| should be an instance of TCustomPresentedScrollBox';
  SScrollBoxAniCalculations = 'Could not create styled presentation because CreateAniCalculations returned nil.';

  { Data Model }
  SDataModelKeyEmpty = 'Key cannot be empty. Data model cannot set or get data by key with an empty name.';

  { Analytics }
  SInvalidActivityTrackingAppID = 'Invalid Application ID';
  SAppAnalyticsDefaultPrivacyMessage = 'Privacy Notice:' + sLineBreak + sLineBreak +
    'This application anonymously tracks your usage and sends it to us for analysis. We use this analysis to make ' +
    'the software work better for you.' + sLineBreak + sLineBreak +
    'This tracking is completely anonymous. No personally identifiable information is tracked, and nothing about ' +
    'your usage can be tracked back to you.' + sLineBreak + sLineBreak +
    'Please click Yes to help us to improve this software. Thank you.';
  SCustomAnalyticsCategoryMissing = 'AppAnalytics custom event error: category cannot be empty.';

  { Clipboard }
  SFormatAlreadyRegistered = 'Custom clipboard format with name "%s" is already registered';
  SFormatWasNotRegistered = 'Custom clipboard format with name "%s" is not registered';
  SDoesnotSupportCustomData = '%s does not support custom data';

  { Helpers }

  SCannotConvertDelphiArrayToJStringArray = 'Cannot convert Delphi Source array to Java JString array. [%d] is unsupported type';

  { Address Book }

  // Permission
  SCannotPerformOperation = 'Cannot perform operation. You have to request permission by using AddressBook.RequestPermission';
  SCannotPerformOperationRejectedAccess = 'Cannot perform operation. User rejected access to AddressBook';
  SRequiredPermissionsAreAbsent = 'Required permission(s) [%s] have not been granted.';
  SPermissionCannotChangeDataInAddressBook = 'Writing permission [WRITE_CONTACTS] has not been granted. You will not be able to make changes with AddressBook';
  SPermissionCannotGetDataFromAddressBook = 'Reading permission [READ_CONTACTS] has not been granted. You will not be able to get data from AddressBook';
  SPermissionCannotGetAccounts = 'Cannot read sources, because your application doesn''t have [GET_ACCOUNTS] permission';
  SUserRejectedAddressBookPermission = 'User rejected permission';
  SUserRejectedCaptureDevicePermission = 'User rejected permission';
  SPermissionsRequestHasBeenCancelled = 'Permissions request has been cancelled';
  // Common
  SCannotSaveAddressBookChanges = 'Cannot save changes in AddressBook. %s';
  SFieldTypeIsNotSupportedOnCurrentPlatform = 'Specified type of field [%s] is not supported on current platform';
  SCannotSaveFieldValue = 'Cannot save [%s]. %s';
  SCannotGetDisplayName = 'Cannot get display name. %s';
  SCannotExtractContactID = 'Cannot extract ID of new contact';
  SCannotCheckExistingDataRecord = 'Cannot check existing data record. %s';
  SCannotExtractAddresses = 'Cannot extract Addresses. %s';
  SCannotExtractMessagingServices = 'Cannot fetch messaging service info. %s';
  SCannotExtractDates = 'Cannot fetch dates. %s';
  SCannotExtractMultipleStringValue = 'Cannot extract multiple string values. %s';
  SCannotExtractStringValue = 'Cannot extract string value. %s';
  SSocialProfilesAreNotSupported = 'Social Profiles are not supported on this platform.';
  SCannotConvertTBitmapToJBitmap = 'Cannot save Contact Photo. TBitmap cannot be converted into JBitmap.';
  SCannotBeginNewProcessing = 'Cannot begin new processing until previous has not finished';
  // Sources
  SCannotFetchAllSourcesNilArg = 'Cannot fetch sources. [%s] cannot be nil.';
  SCannotCreateSource = 'Cannot create contact, use AddressBook.Sources for getting all available sources on your device.';
  SCannotCreateSourceNilArg = 'Cannot create instance of source. [%s] cannot be nil.';
  SCannotGetSourceNameSourceRefRefNil = 'Cannot get source name. [SourceRef] is nil';
  SCannotGetSourceTypeSourceRefRefNil = 'Cannot get source type. [SourceRef] is nil';
  // Contacts
  SCannotFetchContacts = 'Cannot fetch contacts. %s';
  SCannotFetchAllContactsWrongClassArg = 'Cannot fetch contacts. [%s] should be instance of [%s] class.';
  SCannotFetchAllContactNilArg = 'Cannot fetch contacts. [%s] cannot be nil.';
  SCannotFetchAllGroupsFromContact = 'Cannot fetch groups of contact. %s';
  SCannotCreateContact = 'Cannot create contact.';
  SCannotCreateContactNilArg = 'Cannot create instance of contact. [%s] cannot be nil.';
  SCannotCreateContactWrongClassArg = 'Cannot create instance of contact. [%s] should be instance of [%s] class.';
  SCannotCreateContactUseFactoryMethod = 'Cannot create contact, use AddressBook.CreateContact instead.';
  SCannotSaveContact = 'Cannot save contact. %s';
  SCannotSaveContactNilArg = 'Cannot save contact. [%s] cannot be nil.';
  SCannotSaveContactWrongClassArg = 'Cannot save contact. [%s] should be instance of [%s] class.';
  SCannotSaveNotModifiedContact = 'Cannot save contact, when contact is not modified';
  SCannotRemoveContact = 'Cannot remove contact. %s';
  SCannotRemoveContactNilArg = 'Cannot remove contact. [%s] cannot be nil.';
  SCannotRemoveContactWrongClassArg = 'Cannot remove contact. [%s] should be instance of [%s] class.';
  // Groups
  SCannotFetchGroups = 'Cannot fetch groups. %s';
  SCannotFetchAllGroupsWrongClassArg = 'Cannot fetch groups. [%s] should be instance of [%s] class.';
  SCannotFetchAllGroupsNilArg = 'Cannot fetch groups. [%s] cannot be nil.';
  SCannotCreateGroup = 'Cannot create instance of group.';
  SCannotCreateGroupNilArg = 'Cannot create instance of group. [%s] cannot be nil';
  SCannotCreateGroupWrongClassArg = 'Cannot create instance of group. [%s] should be instance of [%s] class.';
  SCannotCreateGroupUseFactoryMethod = 'Cannot create group, use AddressBook.CreateGroup instead.';
  SCannotSaveGroup = 'Cannot save group. %s';
  SCannotSaveGroupNilArg = 'Cannot save group. [%s] cannot be nil.';
  SCannotSaveGroupWrongClassArg = 'Cannot save group. [%s] should be instance of [%s] class.';
  SCannotRemoveGroup = 'Cannot remove group. %s';
  SCannotRemoveGroupNilArg = 'Cannot remove group. [%s] cannot be nil.';
  SCannotRemoveGroupWrongClassArg = 'Cannot remove group. [%s] should be instance of [%s] class.';
  SCannotGetGroupNameGroupRefNil = 'Cannot get group name. GroupRef is nil';
  SCannotSetGroupName = 'Cannot set group name. %s';
  SCannotSetGroupNameGroupRefNil = 'Cannot set group name. GroupRef is nil';
  // Contacts in Group
  SCannotAddContactIntoGroup = 'Cannot add contact to group. %s';
  SCannotAddContactIntoGroupNilArg = 'Cannot add contact to group. [%s] cannot be nil.';
  SCannotAddContactIntoGroupWrongClassArg = 'Cannot add contact to group. [%s] should be instance of [%s] class.';
  SCannotAddContactIntoGroupContactIsNotInAddressBook = 'Cannot add contact to group. Contact is not yet in an AddressBook.';
  SCannotAddContactIntoGroupGroupIsNotInAddressBook = 'Cannot add contact to group. Group is not yet in an AddressBook.';
  SCannotRemoveContactFromGroup = 'Cannot remove contact from group. %s';
  SCannotRemoveContactFromGroupNilArg = 'Cannot remove contact from group. [%s] cannot be nil.';
  SCannotRemoveContactFromGroupWrongClassArg = 'Cannot remove contact from group. [%s] should be instance of [%s] class.';
  SCannotFetchContactInGroup = 'Cannot fetch contacts in group with ID = [%d]. %s';
  SCannotFetchContactsInGroupNilArg = 'Cannot retrieve list of contacts. [%s] cannot be nil.';

  { Address fields kinds }

  SFirstName = 'First Name';
  SLastName = 'Last Name';
  SMiddleName = 'Middle Name';
  SPrefix = 'Prefix';
  SSuffix = 'Suffix';
  SNickName = 'NickName';
  SFirstNamePhonetic = 'First Name Phonetic';
  SLastNamePhonetic = 'Last Name Phonetic';
  SMiddleNamePhonetic = 'Middle Name Phonetic';
  SOrganization = 'Organization';
  SJobTitle = 'Job Title';
  SDepartment = 'Department';
  SPhoto = 'Photo';
  SPhotoThumbnail = 'Photo Thumbnail';
  SNote = 'Note';
  SURLs = 'URLs';
  SEMails = 'Emails';
  SAddresses = 'Addresses';
  SPhones = 'Phones';
  SDates = 'Dates';
  SRelatedNames = 'Related Names';
  SMessagingServices = 'Messaging Services';
  SBirthday = 'Birthday';
  SCreationDate = 'Creation Date';
  SModificationDate = 'Modification Date';
  SSocialProfiles = 'Social Profiles';
  SUnknowType = 'Unknown type value';

  { Sources }

  SSourceLocal = 'Local source';
  SSourceExchange = 'Exchange ';
  SSourceExchangeGAL = 'Exchange Global Address List';
  SSourceMobileMe = 'MobileMe';
  SSourceLDAP = 'LDAP';
  SSourceCardDAV = 'CardDAV';
  SSourceCardDAVSearch = 'Searchable CardDAV';

  { Label types }

  SAddressBookHomeLabel = 'Home';
  SAddressBookWorkLabel = 'Work';
  SAddressBookOtherLabel = 'Other';

  { Phones types }

  SPhoneMain = 'Main';
  SPhoneHome = 'Home';
  SPhoneMobile = 'Mobile';
  SPhoneWork = 'Work';
  SPhoneFaxWork = 'Work fax';
  SPhoneFaxHome = 'Home fax';
  SPhoneFaxOther = 'Other fax';
  SPhonePager = 'Pager';
  SPhoneOther = 'Other';
  SPhoneCallback = 'Callback';
  SPhoneCar = 'Car';
  SPhoneCompanyMain = 'Company main';
  SPhoneISDN = 'ISDN';
  SPhoneRadio = 'Radio';
  SPhoneTelex = 'Telex';
  SPhoneTTYTDD = 'TTY TDD';
  SPhoneWorkMobile = 'Work mobile';
  SPhoneWorkPager = 'Work pager';
  SPhoneAssistant = 'Assistant';
  SPhoneIPhone = 'iPhone';

  { Dates types }

  SDateAnniversary = 'Anniversary';
  SDateBirthday = 'Birthday';
  SDateOther = 'Other';

  { EMails types }

  SEmailsMobile = 'Mobile';

  { Urls }

  SURLHomePage = 'Homepage';
  SURLBlog = 'Blog';
  SURLProfile = 'Profile';
  SURLFTP = 'FTP';

  { Related names }

  SRelationAssistant = 'Assistant';
  SRelationBrother = 'Brother';
  SRelationChild = 'Child';
  SRelationDomesticPartner = 'Domestic Partner';
  SRelationFather = 'Father';
  SRelationFriend = 'Friend';
  SRelationManager = 'Manager';
  SRelationMother = 'Mother';
  SRelationParent = 'Parent';
  SRelationPartner = 'Partner';
  SRelationReferredBy = 'RefferedBy';
  SRelationRelative = 'Relative';
  SRelationSister = 'Sister';
  SRelationSpouse = 'Spouse';

  { IM Protocol names }

  SProtocolAIM = 'AIM';
  SProtocolMSN = 'MSN';
  SProtocolYahoo = 'Yahoo';
  SProtocolSkype = 'Skype';
  SProtocolQQ = 'QQ';
  SProtocolGoogleTalk = 'Google Talk';
  SProtocolICQ = 'ICQ';
  SProtocolJabber = 'Jabber';
  SProtocolNetMeeting = 'Net meeting';
  SProtocolFacebook = 'Facebook';
  SProtocolGaduGadu = 'Gadu Gadu';

  { Social profile }

  SSocialProfileTwitter = 'Twitter';
  SSocialProfileGameCenter = 'Game Center';
  SSocialProfileSinaWeibo = 'Sina Weibo';
  SSocialProfileFacebook = 'Facebook';
  SSocialProfileMySpace = 'MySpace';
  SSocialProfileLinkedIn = 'LinkedIn';
  SSocialProfileFlickr = 'Flickr';

  { TListView }
  SUseItemsPropertyToSetAdapter = 'Use Items property to set TAppearanceListView adapter';

  { Control/Object Helpers }
  SCannotFindParentBySpecifiedCriteria = 'Cannot find parent by specified criteria';

  { Firebase }
  SFireBaseInstanceIdIsNotAvailable = 'FirebaseInstanceId service is not available';

  { WebBrowser }
  SEdgeBrowserEngineUnavailable = 'Edge browser engine is unavailable';
  SEdgeBrowserEngineCreateFailed = 'Failed to create instance of Edge browser engine';

  { TFontManager }
  SCannotFindFontResource = 'Font resource wasn''t found: ResourceName="%s"';
  SCannotFindFontFile = 'Font file wasn''t found: FileName="%s"';

  { Biometric Auth }
  SBiometricNotImplemented = 'Biometric support is not implemented for this platform';
  SBiometricPromptCancelTextDefault = 'Cancel';
  SBiometricPromptTitleTextDefault = 'Authenticate';
  SBiometricErrorKeyNameEmpty = 'Keyname cannot be empty';
  SBiometricErrorCannotAuthenticate = 'Unable to perform authentication';
  SBiometricErrorSystemError = 'A system error occurred: %s';
  SBiometricErrorNotAvailable = 'Biometrics not available';
  SBiometricEnterPINToRestore = 'Enter PIN to restore biometry';
  SBiometricErrorAuthenticationDenied = 'Authentication denied';
  SBiometricErrorTooManyAttempts = 'Too many attempts to authenticate';
  SBiometricErrorSystemErrorInvalidContext = 'Invalid context';
  SBiometricErrorSystemErrorCancelledBySystem = 'Cancelled by system';

//== INTERFACE END: FMX.Consts
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Types (from FMX.Types.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


const
{$HPPEMIT '#define FireMonkeyVersion 290'}
  FireMonkeyVersion = 290;
{$EXTERNALSYM FireMonkeyVersion}

{ Global Settings }

var
  GlobalUseHWEffects: Boolean = True deprecated;
  // On low-end hardware or mobile bitmap effects are slowly
  GlobalDisableFocusEffect: Boolean = False;
  // Allow using Direct3D for UI and 3D rendering
  GlobalUseDX: Boolean = True;
  // Force using legacy DX9 feature level in Direct3D
  GlobalUseDXInDX9Mode: Boolean = False;
  // Give higher priority to Direct3D WARP device instead of hardware layer
  GlobalUseDXSoftware: Boolean = False;
  // Allow using Direct2D for UI rendering
  GlobalUseDirect2D: Boolean = True;
  // Use ClearType rendering in GDI+ renderer
  GlobalUseGDIPlusClearType: Boolean = True;
  /// <summary>The number of decimal digits for the rounding floating point
  /// values.</summary>
  DigitRoundSize: TRoundToRange = -3;
  // Use GPU Canvas
  GlobalUseGPUCanvas: Boolean = False;
  /// <summary>Allow using Metal for UI rendering</summary>
  GlobalUseMetal: Boolean = False;
  /// <summary>If this value is YES, draw loop is paused and updates are event-driven (Metal only)</summary>
  GlobalEventDrivenDisplayUpdates: Boolean = True;
  /// <summary>The rate at which the draw loop update its contents (Metal only)</summary>
  GlobalPreferredFramesPerSecond: Integer = 60;
  /// <summary>Allow using Vulkan for UI rendering</summary>
  GlobalUseVulkan: Boolean = {$IFDEF ANDROID}True{$ELSE}False{$ENDIF};

  GlobalUseDX10: Boolean = True deprecated 'Use GlobalUseDX.';
  GlobalUseDX10Software: Boolean = True deprecated 'Use GlobalUseDXSoftware.';

type
  TVKAutoShowMode = (DefinedBySystem, Never, Always);

var
  VKAutoShowMode: TVKAutoShowMode = TVKAutoShowMode.DefinedBySystem;

type
  TOSPlatform = (Windows, OSX, iOS, Android, Linux);

  TPointArray = array [0..0] of TPointF;

  TLongByteArray = array [0..MaxInt - 1] of Byte;
  PLongByteArray = ^TLongByteArray;

                                                             
  TCorner = (TopLeft, TopRight, BottomLeft, BottomRight);

  TCorners = set of TCorner;

  TCornerType = (Round, Bevel, InnerRound, InnerLine);

  { Four courners describing arbitrary 2D rectangle }
  PCornersF = ^TCornersF;
  TCornersF = array [0 .. 3] of TPointF;

  TSide = (Top, Left, Bottom, Right);

  TSides = set of TSide;

  TTextAlign = (Center, Leading, Trailing);

  TTextAlignHelper = record helper for TTextAlign
  public
    /// <summary> This method converts <b>TTextAlign</b> value to <b>THorzRectAlign</b> </summary>
    function AsHorzRectAlign: THorzRectAlign; inline;
    /// <summary> This method converts <b>TTextAlign</b> value to <b>TVertRectAlign</b> </summary>
    function AsVertRectAlign: TVertRectAlign; inline;
  end;

  TVertRectAlignHelper = record helper for TVertRectAlign
  public
    /// <summary> This method converts <b>TVertRectAlign</b> value to <b>TTextAlign</b> </summary>
    function AsTextAlign: TTextAlign; inline;
  end;

  THorzRectAlignHelper = record helper for THorzRectAlign
  public
    /// <summary> This method converts <b>THorzRectAlign</b> value to <b>TTextAlign</b> </summary>
    function AsTextAlign: TTextAlign; inline;
  end;

  TTextTrimming = (None, Character, Word);
  /// <summary>A type that text controls use to specify whether to consider the
  /// ampersand (&amp;) as a special character</summary>
  TPrefixStyle = (HidePrefix, NoPrefix);

  TStyledSetting = (Family, Size, Style, FontColor, Other);

  TStyledSettings = set of TStyledSetting;

  TMenuItemChange = (Enabled, Visible, Text, Shortcut, Checked, Bitmap);
  TMenuItemChanges = set of TMenuItemChange;

  TScreenOrientation = (Portrait, Landscape, InvertedPortrait, InvertedLandscape);
  TScreenOrientations = set of TScreenOrientation;

  TPixelFormat = (None, RGB, RGBA, BGR, BGRA, RGBA16, BGR_565, BGRA4, BGR4, BGR5_A1, BGR5, BGR10_A2, RGB10_A2, L, LA,
    LA4, L16, A, R16F, RG16F, RGBA16F, R32F, RG32F, RGBA32F);

  TPixelFormatList = TList<TPixelFormat>;

const
  PixelFormatBytes: array[TPixelFormat] of Integer = ({ None } 0, { RGB } 4, { RGBA } 4, { BGR } 4, { BGRA } 4,
    { RGBA16 } 8, { BGR_565 } 2, { BGRA4 } 2, { BGR4 } 2, { BGR5_A1 } 2, { BGR5 } 2, { BGR10_A2 } 4, { RGB10_A2 } 4,
    { L } 1, { LA } 2, { LA4 } 1, { L16 } 2, { A } 1, { R16F } 2, { RG16F } 4, { RGBA16F } 8, { R32F } 4, { RG32F } 8,
    { RGBA32F } 16);

  NullRect: TRectF = (Left: 0; Top: 0; Right: 0; Bottom: 0);

  AllCorners: TCorners = [TCorner.TopLeft, TCorner.TopRight,
    TCorner.BottomLeft, TCorner.BottomRight];

  AllSides: TSides = [TSide.Top, TSide.Left, TSide.Bottom, TSide.Right];

  ClosePolygon: TPointF = (X: $FFFF; Y: $FFFF) deprecated 'Non-closed polygons are not supported.';

  /// <summary>A special polygon point marker typically used for converting paths to polygons and vice-versa,
  /// usually indicating path closure. For the rendering methods, this marker has no meaning and the actual
  /// interpretation may be platform-dependent.</summary>
  PolygonPointBreak: TPointF = (X: $FFFFFF; Y: $FFFFFF);

  AllStyledSettings: TStyledSettings = [TStyledSetting.Family,
                                        TStyledSetting.Size,
                                        TStyledSetting.Style,
                                        TStyledSetting.FontColor,
                                        TStyledSetting.Other];
  DefaultStyledSettings: TStyledSettings = [TStyledSetting.Family,
                                            TStyledSetting.Size,
                                            TStyledSetting.Style,
                                            TStyledSetting.FontColor];

  InvalidSize : TSizeF = (cx: -1; cy: -1);

  AlignmentToTTextAlign: array [TAlignment] of TTextAlign =
    (TTextAlign.Leading, TTextAlign.Trailing, TTextAlign.Center);

type
  TGestureID = rgiFirst .. igiLast;

  TInteractiveGestureFlag = (gfBegin, gfInertia, gfEnd);
  TInteractiveGestureFlags = set of TInteractiveGestureFlag;

  TGestureEventInfo = record
    GestureID: TGestureID;
    Location: TPointF;
    Flags: TInteractiveGestureFlags;
    Angle: Double;
    InertiaVector: TPointF;
    Distance: Integer;
    TapLocation: TPointF;
  end;

  TGestureEvent = procedure(Sender: TObject; const EventInfo: TGestureEventInfo;
     var Handled: Boolean) of object;

  TTouchAction = (None, Up, Down, Move, Cancel);
  TTouchActions = set of TTouchAction;

  TTouch = record
    Id: NativeInt;
    Location: TPointF;
    Action: TTouchAction;
  end;
  TTouches = array of TTouch;

type
  TFormStyle = (Normal, Popup, StayOnTop);
  TAlignLayout = (None, Top, Left, Right, Bottom, MostTop, MostBottom, MostLeft, MostRight, Client, Contents, Center, VertCenter, HorzCenter, Horizontal, Vertical, Scale, Fit, FitLeft, FitRight);

  TImeMode = (imDontCare, // All IMEs
              imDisable,  // All IMEs
              imClose,    // Chinese and Japanese only
              imOpen,     // Chinese and Japanese only
              imSAlpha,   // Japanese and Korea
              imAlpha,    // Japanese and Korea
              imHira,     // Japanese only
              imSKata,    // Japanese only
              imKata,     // Japanese only
              imChineseClose, // Chinese IME only
              imOnHalf,   // Chinese IME only
              imSHanguel, // Korean IME only
              imHanguel   // Korean IME only
              );

  TDragOperation = (None, Move, Copy, Link);

  TDragObject = record
    Source: TObject;
    Files: array of string;
    Data: TValue;
  end;

  TFmxHandle = THandle;
  TFlasherInterval = -1..1000;

const
  cIdNoTimer: TFmxHandle = TFmxHandle(-1);

type
  TCanActionExecEvent = procedure(Sender: TCustomAction; var CanExec: Boolean) of object;

  TFmxObject = class;
  TFmxObjectClass = class of TFmxObject;
  TBounds = class;
  TLineMetricInfo = class;
  TTouchManager = class;
  TCustomPopupMenu = class;

  TWindowHandle = class
  protected
    /// <summary>Returns window scale factor.</summary>
    function GetScale: Single; virtual;
  public
    /// <summary>Returns True if Scale is integer value.</summary>
    function IsScaleInteger: Boolean;
    /// <summary>Window scale factor.</summary>
    property Scale: Single read GetScale;
  end;

  IFreeNotification = interface
    ['{FEB50EAF-A3B9-4b37-8EDB-1EF9EE2F22D4}']
    procedure FreeNotification(AObject: TObject);
  end;

  IFreeNotificationBehavior = interface
    ['{83F052C5-8696-4AFA-88F5-DCDFEF005480}']
    procedure AddFreeNotify(const AObject: IFreeNotification);
    procedure RemoveFreeNotify(const AObject: IFreeNotification);
  end;

  TCustomCaret = class;

  ICaret = interface
    ['{F4EFFFB8-E83C-421D-B123-C370FB7BCCC7}']
    function GetObject: TCustomCaret;
    procedure ShowCaret;
    procedure HideCaret;
  end;

  IFlasher = interface
    ['{1A9163B4-47FD-45D6-A54F-70158CB01777}']
    function GetColor: TAlphaColor;
    function GetPos: TPointF;
    function GetSize: TSizeF;
    function GetVisible: Boolean;
    function GetOpacity: Single;
    function GetInterval: TFlasherInterval;
    function GetCaret: TCustomCaret;
    procedure SetCaret(const Value: TCustomCaret);

    property Color: TAlphaColor read GetColor;
    property Pos: TPointF read GetPos;
    property Size: TSizeF read GetSize;
    property Visible: boolean read GetVisible;
    property Opacity: Single read GetOpacity;
    property Interval: TFlasherInterval read GetInterval;
    property Caret: TCustomCaret read GetCaret write SetCaret;
    procedure UpdateState;
  end;

  IContainerObject = interface
    ['{DE635E60-CB00-4741-92BB-3B8F1F29A67C}']
    function GetContainerWidth: Single;
    function GetContainerHeight: Single;
    property ContainerWidth: single read GetContainerWidth;
    property ContainerHeight: single read GetContainerHeight;
  end;

  IOriginalContainerSize = interface
    ['{E76F6097-AF5D-49a1-9C7B-5127D6068059}']
    function GetOriginalContainerSize: TPointF;
    property OriginalContainerSize: TPointF read GetOriginalContainerSize;
  end;

  IObjectState = interface
    ['{0402E1A6-1F75-4D28-BFEA-8092803B00EE}']
    function SaveState: Boolean;
    function RestoreState: Boolean;
  end;

  /// <summary>
  ///   The interface is designed to notify the container component of any changes among the child components.
  /// </summary>
  IContentObserver = interface
    ['{F75361BC-73E2-4DC1-9BA0-C5FC711E34D2}']
    procedure Changed(const AChild: TFmxObject);
  end;

  IContent = interface
    ['{96E89B94-2AD6-4AD3-A07C-92E66B2E6BC8}']
    function GetParent: TFmxObject;
    function GetObject: TFmxObject;
    function GetChildrenCount: Integer;
    property Parent: TFmxObject read GetParent;
    property ChildrenCount: Integer read GetChildrenCount;
    procedure Changed;
  end;

  IFMXCursorService = interface(IInterface)
    ['{5D359E54-2543-414E-8268-A53292E4FDB4}']
    procedure SetCursor(const ACursor: TCursor);
    function GetCursor: TCursor;
  end;

  IFMXMouseService = interface(IInterface)
    ['{2370205F-CF27-4DF6-9B1F-5EBC27271D5A}']
    function GetMousePos: TPointF;
  end;

  ITabStopController = interface;

  IControl = interface(IFreeNotificationBehavior)
    ['{7318D022-D048-49DE-BF55-C5C36A2AD1AC}']
    function GetObject: TFmxObject;
    procedure SetFocus;
    function GetIsFocused: Boolean;
    function GetCanFocus: Boolean;
    function GetCanParentFocus: Boolean;
    function GetEnabled: Boolean;
    function GetAbsoluteEnabled: Boolean;
    function GetPopupMenu: TCustomPopupMenu;
    function EnterChildren(AObject: IControl): Boolean;
    function ExitChildren(AObject: IControl): Boolean;
    procedure DoEnter;
    procedure DoExit;
    procedure DoActivate;
    procedure DoDeactivate;
    procedure DoMouseEnter;
    procedure DoMouseLeave;
    function ShowContextMenu(const ScreenPosition: TPointF): Boolean;
    function ScreenToLocal(const AScreenPoint: TPointF): TPointF;
    function LocalToScreen(const ALocalPoint: TPointF): TPointF;
    function ObjectAtPoint(AScreenPoint: TPointF): IControl;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single);
    procedure MouseMove(Shift: TShiftState; X, Y: Single);
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single);
    procedure MouseWheel(Shift: TShiftState; WheelDelta: Integer; var Handled: Boolean);
    procedure MouseClick(Button: TMouseButton; Shift: TShiftState; X, Y: Single);
    procedure KeyDown(var Key: Word; var KeyChar: WideChar; Shift: TShiftState);
    procedure KeyUp(var Key: Word; var KeyChar: WideChar; Shift: TShiftState);
    procedure Tap(const Point: TPointF);
    procedure DialogKey(var Key: Word; Shift: TShiftState);
    procedure AfterDialogKey(var Key: Word; Shift: TShiftState);
    function FindTarget(P: TPointF; const Data: TDragObject): IControl;
    procedure DragEnter(const Data: TDragObject; const Point: TPointF);
    procedure DragOver(const Data: TDragObject; const Point: TPointF; var Operation: TDragOperation);
    procedure DragDrop(const Data: TDragObject; const Point: TPointF);
    procedure DragLeave;
    procedure DragEnd;
    function CheckForAllowFocus: Boolean;
    procedure Repaint;
    function GetDragMode: TDragMode;
    procedure SetDragMode(const ADragMode: TDragMode);
    procedure BeginAutoDrag;
    function GetParent: TFmxObject;
    function GetLocked: Boolean;
    function GetVisible: Boolean;
    procedure SetVisible(const Value: Boolean);
    function GetHitTest: Boolean;
    function GetCursor: TCursor;
    function GetInheritedCursor: TCursor;
    function GetDesignInteractive: Boolean;
    function GetAcceptsControls: Boolean;
    procedure SetAcceptsControls(const Value: Boolean);
    procedure BeginUpdate;
    procedure EndUpdate;
    function GetTabStopController: ITabStopController;
    function GetTabStop: Boolean;
    procedure SetTabStop(const TabStop: Boolean);
    /// <summary>This method returns true if the control has an available hint to display.</summary>
    function HasHint: Boolean;
    /// <summary>If HasHint is true, this method is invoked in order to know if the control has an available
    /// string to swho as hint.</summary>
    function GetHintString: string;
    /// <summary>If HasHint is true, this method is invoked in order to know if the control has a custom hint
    /// object to manage the hint display. This usually returns an instance of THint to allow the form to manage
    /// it.</summary>
    function GetHintObject: TObject;
    { access }
    property AbsoluteEnabled: Boolean read GetAbsoluteEnabled;
    property Cursor: TCursor read GetCursor;
    property InheritedCursor: TCursor read GetInheritedCursor;
    property DragMode: TDragMode read GetDragMode write SetDragMode;
    property DesignInteractive: Boolean read GetDesignInteractive;
    property Enabled: Boolean read GetEnabled;
    property Parent: TFmxObject read GetParent;
    property Locked: Boolean read GetLocked;
    property HitTest: Boolean read GetHitTest;
    property PopupMenu: TCustomPopupMenu read GetPopupMenu;
    property Visible: Boolean read GetVisible write SetVisible;
    property AcceptsControls: Boolean read GetAcceptsControls write SetAcceptsControls;
    property IsFocused: Boolean read GetIsFocused;
    property TabStop: Boolean read GetTabStop write SetTabStop;
  end;

  IFlipContainer = interface
  ['{F3850EDC-75F1-4122-AF7D-02A69346376C}']
    procedure FlipChildren(const AAllLevels: Boolean);
  end;

  /// <summary> This interface is used to acces to property <b>ReadOnly</b> of all classes which supports this property
  /// </summary>
  IReadOnly = interface
    ['{495B8B0C-D7C8-4835-AA5F-580939D21444}']
    function GetReadOnly: Boolean;
    procedure SetReadOnly(const Value: Boolean);
    /// <summary> The property to which we have access </summary>
    property ReadOnly: Boolean read GetReadOnly write SetReadOnly;
  end;

  IRoot = interface
    ['{7F7BB7B0-5932-49dd-9D35-712B2BA5D8EF}']
    procedure AddObject(const AObject: TFmxObject);
    procedure InsertObject(Index: Integer; const AObject: TFmxObject);
    procedure RemoveObject(const AObject: TFmxObject); overload;
    procedure RemoveObject(Index: Integer); overload;
    procedure BeginInternalDrag(const Source: TObject; const ABitmap: TObject);
    function GetActiveControl: IControl;
    procedure SetActiveControl(const AControl: IControl);
    function GetCaptured: IControl;
    procedure SetCaptured(const Value: IControl);
    function GetFocused: IControl;
    procedure SetFocused(const Value: IControl);
    function NewFocusedControl(const Value: IControl): IControl;
    function GetHovered: IControl;
    procedure SetHovered(const Value: IControl);
    function GetObject: TFmxObject;
    function GetBiDiMode: TBiDiMode;
    { access }
    property Captured: IControl read GetCaptured write SetCaptured;
    property Focused: IControl read GetFocused write SetFocused;
    property Hovered: IControl read GetHovered write SetHovered;
    property BiDiMode: TBiDiMode read GetBiDiMode;
  end;

  IAlignRoot = interface
  ['{86DF30A6-0394-4a0e-8722-1F2CDB242CE8}']
    procedure Realign;
    procedure ChildrenAlignChanged;
  end;

  INativeControl = interface
  ['{3E6F1A17-BAE3-456C-8551-5F6EA92EEE32}']
    function GetHandle: TFmxHandle;
    procedure SetHandle(const Value: TFmxHandle);
    function GetHandleSupported: boolean;
    property HandleSupported: boolean read GetHandleSupported;
    property Handle: TFmxHandle read GetHandle write SetHandle;
  end;

  IPaintControl = interface
  ['{47959F99-CCA5-4ACF-BB8D-357F126E9C78}']
    procedure PaintRects(const UpdateRects: array of TRectF);
    procedure SetContextHandle(const AContextHandle: THandle);
    function GetContextHandle: THandle;
    property ContextHandle: THandle read GetContextHandle write SetContextHandle;
  end;

  TVirtualKeyboardType = (Default, NumbersAndPunctuation, NumberPad, PhonePad, Alphabet, URL, NamePhonePad,
    EmailAddress, DecimalNumberPad);

  TVirtualKeyboardState = (AutoShow, Visible, Error, Transient);

  TVirtualKeyboardStates = set of TVirtualKeyboardState;

  TReturnKeyType = (Default, Done, Go, Next, Search, Send);

  IVirtualKeyboardControl = interface
    ['{41127080-97FC-4C30-A880-AB6CD351A6C4}']
    procedure SetKeyboardType(Value: TVirtualKeyboardType);
    function GetKeyboardType: TVirtualKeyboardType;
    property KeyboardType: TVirtualKeyboardType read GetKeyboardType write SetKeyboardType;
    //
    procedure SetReturnKeyType(Value: TReturnKeyType);
    function GetReturnKeyType: TReturnKeyType;
    property ReturnKeyType: TReturnKeyType read GetReturnKeyType write SetReturnKeyType;
    //
    function IsPassword: Boolean;
  end;

  TAdjustType = (None, FixedSize, FixedWidth, FixedHeight);

  IAlignableObject = interface
    ['{420D3E98-4433-4cbe-9767-0B494DF08354}']
    function GetAlign: TAlignLayout;
    procedure SetAlign(const Value: TAlignLayout);
    function GetAnchors: TAnchors;
    procedure SetAnchors(const Value: TAnchors);
    function GetMargins: TBounds;
    procedure SetBounds(X, Y, AWidth, AHeight: Single);
    function GetPadding: TBounds;
    function GetWidth: single;
    function GetHeight: single;
    function GetLeft: single;
    function GetTop: single;
    function GetAllowAlign: Boolean;

    function GetAnchorRules: TPointF;
    function GetAnchorOrigin: TPointF;
    function GetOriginalParentSize: TPointF;
    function GetAnchorMove : Boolean;
    procedure SetAnchorMove(Value : Boolean);

    function GetAdjustType: TAdjustType;
    function GetAdjustSizeValue: TSizeF;
    { access }
    property Align: TAlignLayout read GetAlign write SetAlign;
    property AllowAlign: Boolean read GetAllowAlign;
    property Anchors: TAnchors read GetAnchors write SetAnchors;
    property Margins: TBounds read GetMargins;
    property Padding: TBounds read GetPadding;
    property Left: single read GetLeft;
    property Height: single read GetHeight;
    property Width: single read GetWidth;
    property Top: single read GetTop;

    property AnchorRules: TPointF read GetAnchorRules;
    property AnchorOrigin: TPointF read GetAnchorOrigin;
    property OriginalParentSize: TPointF read GetOriginalParentSize;
    property AnchorMove : Boolean read GetAnchorMove write SetAnchorMove;

    property AdjustType: TAdjustType read GetAdjustType;
    property AdjustSizeValue: TSizeF read GetAdjustSizeValue;
  end;

  IItemsContainer = interface
    ['{100B2F87-5DCB-4699-B751-B4439588E82A}']
    function GetItemsCount: Integer;
    function GetItem(const AIndex: Integer): TFmxObject;
    function GetObject: TFmxObject;
  end;

  ITabList = interface
    ['{80C67BA2-3064-4d90-A8E1-B00028CA670E}']
    procedure Add(const TabStop: IControl);
    procedure Remove(const TabStop: IControl);
    procedure Update(const TabStop: IControl; const NewValue: TTabOrder);
    function GetTabOrder(const TabStop: IControl): TTabOrder;
    function GetCount: Integer;
    function GetItem(const Index: Integer): IControl;
    function FindNextTabStop(const Current: IControl; const MoveForward: Boolean; const Climb: Boolean): IControl;
    property Count: Integer read GetCount;
  end;

  ITabStopController = interface
    ['{E7D2E0C5-EA3B-40bd-B728-5E4BB264EFC1}']
    function GetTabList: ITabList;
    property TabList: ITabList read GetTabList;
  end;

  TTangentPair = record
    I: Single;
    Ip1: Single;
  end;

  TSpline = class(TObject)
  private
    FTangentsX, FTangentsY: array of TTangentPair;
    FValuesX, FValuesY: array of Single;
  public
    constructor Create(const Polygon: TPolygon);
    destructor Destroy; override;
    procedure SplineXY(const t: Single; var X, Y: Single);
  end;

  TDragEnterEvent = procedure(Sender: TObject; const Data: TDragObject; const Point: TPointF) of object;
  TDragOverEvent = procedure(Sender: TObject; const Data: TDragObject; const Point: TPointF;
    var Operation: TDragOperation) of object;
  TDragDropEvent = procedure(Sender: TObject; const Data: TDragObject; const Point: TPointF) of object;
  TCanFocusEvent = procedure(Sender: TObject; var ACanFocus: Boolean) of object;

  PDeviceDisplayMetrics = ^TDeviceDisplayMetrics;
  TDeviceDisplayMetrics = record
    PhysicalScreenSize: TSize;
    LogicalScreenSize: TSize;
    /// <summary>When available, complete screen area in pixels, including status bars and button bars. Can be
    /// the same as PhysicalScreenSize.</summary>
    RawScreenSize: TSize;
    AspectRatio: Single;
    PixelsPerInch: Integer;
    ScreenScale: Single;
    FontScale: Single;

    constructor Create(const APhysicalScreenSize, ALogicalScreenSize: TSize; const AAspectRatio: Single;
      const APixelsPerInch: Integer; const AScreenScale, AFontScale: Single);

    class operator Equal(const Left, Right: TDeviceDisplayMetrics): Boolean;
    class operator NotEqual(const Left, Right: TDeviceDisplayMetrics): Boolean; inline;

    class function Default: TDeviceDisplayMetrics; static;
  end;

{ TBounds }

  TBounds = class(TPersistent)
  private
    FRight: Single;
    FBottom: Single;
    FTop: Single;
    FLeft: Single;
    FOnChange: TNotifyEvent;
    FDefaultValue: TRectF;
    function GetRect: TRectF;
    procedure SetRect(const Value: TRectF);
    procedure SetBottom(const Value: Single);
    procedure SetLeft(const Value: Single);
    procedure SetRight(const Value: Single);
    procedure SetTop(const Value: Single);
    function IsBottomStored: Boolean;
    function IsLeftStored: Boolean;
    function IsRightStored: Boolean;
    function IsTopStored: Boolean;
    procedure ReadLeftInt(Reader: TReader);
    procedure ReadBottomInt(Reader: TReader);
    procedure ReadRightInt(Reader: TReader);
    procedure ReadTopInt(Reader: TReader);
    procedure ReadRectInt(Reader: TReader);
    procedure ReadRect(Reader: TReader);
  protected
    procedure DefineProperties(Filer: TFiler); override;
    procedure DoChange; virtual;
  public
    constructor Create(const ADefaultValue: TRectF); virtual;
    procedure Assign(Source: TPersistent); override;
    function Equals(Obj: TObject): Boolean; override;
    function PaddingRect(const R: TRectF): TRectF;
    function MarginRect(const R: TRectF): TRectF;
    function Width: Single;
    function Height: Single;
    property Rect: TRectF read GetRect write SetRect;
    property DefaultValue: TRectF read FDefaultValue write FDefaultValue;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    function Empty: Boolean;
    function MarginEmpty: Boolean;
    function ToString: string; override;
  published
    property Left: Single read FLeft write SetLeft stored IsLeftStored nodefault;
    property Top: Single read FTop write SetTop stored IsTopStored nodefault;
    property Right: Single read FRight write SetRight stored IsRightStored nodefault;
    property Bottom: Single read FBottom write SetBottom stored IsBottomStored nodefault;
  end;

{ TPosition }

  TPosition = class(TPersistent)
  private
    FOnChange: TNotifyEvent;
    FY: Single;
    FX: Single;
    FDefaultValue: TPointF;
    FStoreAsInt: Boolean;
    procedure SetPoint(const Value: TPointF);
    procedure SetX(const Value: Single);
    procedure SetY(const Value: Single);
    function GetPoint: TPointF;
    function IsXStored: Boolean;
    function IsYStored: Boolean;
    procedure ReadXInt(Reader: TReader);
    procedure WriteXInt(Writer: TWriter);
    procedure ReadYInt(Reader: TReader);
    procedure WriteYInt(Writer: TWriter);
  protected
    procedure DefineProperties(Filer: TFiler); override;
    procedure ReadPoint(Reader: TReader);
    procedure WritePoint(Writer: TWriter);
    procedure DoChange; virtual;
  public
    constructor Create(const ADefaultValue: TPointF); virtual;
    procedure Assign(Source: TPersistent); override;
    procedure SetPointNoChange(const P: TPointF);
    function Empty: Boolean;
    procedure Reflect(const Normal: TPointF);
    property Point: TPointF read GetPoint write SetPoint;
    property StoreAsInt: Boolean read FStoreAsInt write FStoreAsInt;
    property DefaultValue: TPointF read FDefaultValue write FDefaultValue;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
  published
    property X: Single read FX write SetX stored IsXStored nodefault;
    property Y: Single read FY write SetY stored IsYStored nodefault;
  end;

  TControlSize = class(TPersistent)
  private
    FUsePlatformDefault: Boolean;
    FSize: TSizeF;
    FDefaultValue: TSizeF;
    FOnChange: TNotifyEvent;
    procedure SetWidth(const AValue: Single);
    procedure SetHeight(const AValue: Single);
    function GetWidth: Single;
    function GetHeight: Single;
    function StoreWidthHeight: Boolean;
    procedure SetUsePlatformDefault(const Value: Boolean);
    function GetSize: TSizeF;
    procedure SetSize(const Value: TSizeF);
  protected
    procedure DoChange; virtual;
  public
    constructor Create(const ASize: TSizeF);
    procedure Assign(Source: TPersistent); override;
    procedure SetPlatformDefaultWithoutNotification(const Value: Boolean); inline;
    procedure SetSizeWithoutNotification(const Value: TSizeF);
    property DefaultValue: TSizeF read FDefaultValue write FDefaultValue;
    property Size: TSizeF read GetSize write SetSize;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
  published
    property Width: Single read GetWidth write SetWidth stored StoreWidthHeight nodefault;
    property Height: Single read GetHeight write SetHeight stored StoreWidthHeight nodefault;
    property PlatformDefault: Boolean read FUsePlatformDefault write SetUsePlatformDefault default True;
  end;

  IRotatedControl = interface
    ['{9EACF441-30E1-467D-88DA-CC8B2977758F}']
    function GetRotationAngle: Single;
    function GetRotationCenter: TPosition;
    function GetScale: TPosition;
    procedure SetRotationAngle(const Value: Single);
    procedure SetRotationCenter(const Value: TPosition);
    procedure SetScale(const Value: TPosition);
    property RotationAngle: Single read GetRotationAngle write SetRotationAngle;
    property RotationCenter: TPosition read GetRotationCenter write SetRotationCenter;
    property Scale: TPosition read GetScale write SetScale;
  end;

  TCaretDisplayChanged = procedure (Sender: TCustomCaret; const VirtualKeyboardState: TVirtualKeyboardStates) of object;

  TCaretClass = class of TCustomCaret;

  TCustomCaret = class (TPersistent)
  private
    [Weak]FOwner: TFMXObject;
    FIControl: IControl;
    FVisible: Boolean;
    FDisplayed: Boolean;
    FTemporarilyHidden: Boolean;
    FChanged: Boolean;
    FUpdateCount: Integer;
    FOnDisplayChanged: TCaretDisplayChanged;
    FColor: TAlphaColor;
    FDefaultColor: TAlphaColor;
    FPos: TPointF;
    FSize: TSizeF;
    FInterval: TFlasherInterval;
    FReadOnly: Boolean;
    procedure SetColor(const Value: TAlphaColor);
    procedure SetPos(const Value: TPointF);
    procedure SetSize(const Value: TSizeF);
    procedure SetTemporarilyHidden(const Value: boolean);
    procedure SetVisible(const Value: Boolean);
    procedure SetInterval(const Value: TFlasherInterval);
    procedure SetReadOnly(const Value: boolean);
    procedure StartTimer;
    function GetWidth: Word;
    procedure SetWidth(const Value: Word);
    function GetFlasher: IFlasher;
    procedure SetDefaultColor(const Value: TAlphaColor);
  protected
    function GetOwner: TPersistent; override;
    procedure DoDisplayChanged(const VirtualKeyboardState: TVirtualKeyboardStates); virtual;
    procedure DoUpdateFlasher; virtual;
  public
    constructor Create(const AOwner: TFMXObject); virtual;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    /// <summary>
    ///   hide the caret
    /// </summary>
    procedure Hide; virtual;
    /// <summary>
    ///   if possible (CanShow = True and Visible = True), the caret show.
    /// </summary>
    procedure Show; virtual;
    /// <summary>
    ///   This method is performed after changing the Displayed
    /// </summary>
    property Pos: TPointF read FPos write SetPos;
    property Size: TSizeF read FSize write SetSize;
    property Color: TAlphaColor read FColor write SetColor default TAlphaColorRec.Null;
    property DefaultColor: TAlphaColor read FDefaultColor write SetDefaultColor;
    property Interval: TFlasherInterval read FInterval write SetInterval default 0;
    property Owner: TFMXObject read FOwner;
    property Control: IControl read FIControl;
    procedure BeginUpdate;
    procedure EndUpdate;
    class function FlasherName: string; virtual; abstract;
    property UpdateCount: Integer read FUpdateCount;
    /// <summary>
    ///   The update of the "Flasher", if UpdateCount = 0.
    /// </summary>
    procedure UpdateFlasher;
    /// <summary>
    ///   This property controls the visibility of a caret, for the control in which the input focus.
    /// </summary>
    property Visible: Boolean read FVisible write SetVisible;
    /// <summary>
    ///   The function returns true, if the control is visible, enabled,
    ///   has the input focus and it in an active form
    /// </summary>
    function CanShow: Boolean; virtual;
    /// <summary>
    ///   This property is set to True, after the successful execution of
    ///   method Show, and is set to False after method Hide
    /// </summary>
    property Displayed: Boolean read FDisplayed;
    /// <summary>
    ///   If this property is 'true', the blinking control is invisible
    ///   and does not take values of Visible, Displayed.
    ///   When you change the properties, methods DoShow, DoHide, DoDisplayChanged not met.
    /// </summary>
    property TemporarilyHidden: boolean read FTemporarilyHidden write SetTemporarilyHidden;
    /// <summary>
    ///   Blinking visual component is displayed.
    ///   Usually this line, having a thickness of one or two pixels.
    /// </summary>
    property Flasher: IFlasher read GetFlasher;
    property ReadOnly: boolean read FReadOnly write SetReadOnly;
    property Width: Word read GetWidth write SetWidth default 0;

    property OnDisplayChanged: TCaretDisplayChanged read FOnDisplayChanged write FOnDisplayChanged;
  end;

{ TTransform }

  TTransform = class(TPersistent)
  private
    FMatrix: TMatrix;
    FRotationAngle: Single;
    FPosition: TPosition;
    FScale: TPosition;
    FSkew: TPosition;
    FRotationCenter: TPosition;
    FOnChanged: TNotifyEvent;
    procedure SetRotationAngle(const Value: Single);
    procedure SetScale(const Value: TPosition);
    procedure SetPosition(const Value: TPosition);
  protected
    procedure MatrixChanged(Sender: TObject);
    property Skew: TPosition read FSkew write FSkew;
  public
    constructor Create; virtual;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    property Matrix: TMatrix read FMatrix;
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
  published
    property Position: TPosition read FPosition write SetPosition;
    property Scale: TPosition read FScale write SetScale;
    property RotationAngle: Single read FRotationAngle write SetRotationAngle;
    property RotationCenter: TPosition read FRotationCenter write FRotationCenter;
  end;

  TTrigger = type string;

  TAnimationType = (&In, Out, InOut);

  TInterpolationType = (Linear, Quadratic, Cubic, Quartic, Quintic, Sinusoidal, Exponential, Circular, Elastic, Back, Bounce);

  TMouseEvent = procedure(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Single) of object;
  TMouseMoveEvent = procedure(Sender: TObject; Shift: TShiftState; X, Y: Single) of object;
  TMouseWheelEvent = procedure(Sender: TObject; Shift: TShiftState; WheelDelta: Integer; var Handled: Boolean) of object;
  TKeyEvent = procedure(Sender: TObject; var Key: Word; var KeyChar: WideChar; Shift: TShiftState) of object;
  TProcessTickEvent = procedure(Sender: TObject; time, deltaTime: Single) of object;
  TVirtualKeyboardEvent = procedure(Sender: TObject; KeyboardVisible: Boolean; const Bounds : TRect) of object;
  TTapEvent = procedure(Sender: TObject; const Point: TPointF) of object;
  TTouchEvent = procedure(Sender: TObject; const Touches: TTouches; const Action: TTouchAction) of object;

  TFmxObjectSortCompare = reference to function (Left, Right: TFmxObject): Integer;

  TFmxObjectList = TList<TFmxObject>;

  TFmxChildrenList = class(TEnumerable<TFmxObject>)
  strict private
    [weak] FChildren: TFmxObjectList;
  protected
    function DoGetEnumerator: TEnumerator<TFmxObject>; override;
    function GetChildCount: Integer; virtual;
    function GetChild(AIndex: Integer): TFmxObject; virtual;
  public
    constructor Create(const AChildren: TFmxObjectList);
    destructor Destroy; override;
    property Count: Integer read GetChildCount;
    function IndexOf(const Obj: TFmxObject): Integer; virtual;
    property Items[Index: Integer]: TFmxObject read GetChild; default;
  end;

{ TFmxObject }

  TEnumProcResult = (Continue, Discard, Stop);

  /// <summary>Index for getting fast access to nested objects by <c>StyleName</c>.</summary>
  TStyleIndexer = class
  private
    [Weak] FStyle: TFmxObject;
    FIndex: TDictionary<string, TFmxObject>;
    procedure Rebuild;
  public
    constructor Create(const AStyle: TFmxObject);
    destructor Destroy; override;

    /// <summary>Marks index for lazy update.</summary>
    procedure NeedRebuild;
    /// <summary>Updates index, if it's required only.</summary>
    procedure RebuildIfNeeded;
    /// <summary>Finds style object by specified <c>StyleLookup</c> value and returns object in <c>AObject</c>.</summary>
    function FindStyleObject(const AStyleLookup: string; var AObject: TFmxObject): Boolean;
    /// <summary>Clears index.</summary>
    procedure Clear;
  end;

  TFmxObject = class(TComponent, IFreeNotification, IActionClient)
  public type
    /// <summary> Determines the current state of the object
    /// <para>CallingFreeNotify - state is set before sending notifications in <b>BeforeDestruction</b> method.
    /// See also <b>IFreeNotification</b></para>
    /// <para>CallingRelease - state is set in <b>Release</b> method</para>
    /// </summary>
    TObjectState = set of (CallingFreeNotify, CallingRelease) deprecated 'Support to this state will be removed';
  strict private
    FChildren: TFmxObjectList;
    FChildrenList: TFmxChildrenList;
    FStyleIndexer: TStyleIndexer;
  private
    FStored: Boolean;
    [Weak] FTagObject: TObject;
    FTagFloat: Single;
    FTagString: string;
    FNotifyList: TList<Pointer>;
    FIndex: Integer;
    FActionClient: Boolean;
    FActionLink: TActionLink;
    FRoot: IRoot;
    procedure SetStyleName(const Value: string);
    procedure SetStored(const Value: Boolean);
    function GetChildrenCount: Integer; inline;
    function GetIndexOfChild(const Child: TFmxObject): Integer;
    procedure SetIndexOfChild(const Child: TFmxObject; NewIndex: Integer);
    procedure SetIndex(NewIndex: Integer);
    { IActionClient }
    function IActionClient.GetRoot = GetActionRoot;
    function GetActionRoot: TComponent;
    function GetActionClient: Boolean; inline;
    procedure SetActionClient(const Value: boolean);
    function GetAction: TBasicAction;
    procedure SetAction(const Value: TBasicAction);
    function GetIndex: Integer;

    class constructor Create;
    class destructor Destroy;
  protected
    FStyleName: string;
    [Weak] FParent: TFmxObject;
    function CreateChildrenList(const Children: TFmxObjectList): TFmxChildrenList; virtual;
    procedure ResetChildrenIndicesSpan(const First, Last: Integer);
    procedure ResetChildrenIndices;
    function GetBackIndex: Integer; virtual;
    procedure DefineProperties(Filer: TFiler); override;
    procedure IgnoreBindingName(Reader: TReader);
    { RTL }
    procedure GetChildren(Proc: TGetChildProc; Root: TComponent); override;
    procedure SetParentComponent(Value: TComponent); override;
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
    { Actions }
    function GetActionLinkClass: TActionLinkClass; virtual;
    procedure InitiateAction; virtual;
    procedure DoActionChange(Sender: TObject); virtual;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); virtual;
    procedure DoActionClientChanged; virtual;
    property ActionLink: TActionLink read FActionLink;
    property Action: TBasicAction read GetAction write SetAction;
    property StyleIndexer: TStyleIndexer read FStyleIndexer;
  public
    function GetParentComponent: TComponent; override;
    function HasParent: Boolean; override;
  protected
    procedure AddToResourcePool; virtual;
    procedure RemoveFromResourcePool; virtual;
    { parent }
    procedure SetParent(const Value: TFmxObject); virtual;
    procedure DoRootChanging(const NewRoot: IRoot); virtual;
    procedure DoRootChanged; virtual;
    procedure ParentChanged; virtual;
    procedure ChangeOrder; virtual;
    procedure ChangeChildren; virtual;
    { children }
    procedure DoAddObject(const AObject: TFmxObject); virtual;
    procedure DoInsertObject(Index: Integer; const AObject: TFmxObject); virtual;
    procedure DoRemoveObject(const AObject: TFmxObject); virtual;
    procedure DoDeleteChildren; virtual;
    function SearchInto: Boolean; virtual;
    { IFreeNotification }
    procedure FreeNotification(AObject: TObject); virtual;
    { design }
    function SupportsPlatformService(const AServiceGUID: TGUID; out AService): Boolean; virtual;
    { Data }
    function GetData: TValue; virtual;
    procedure SetData(const Value: TValue); virtual;
    procedure IgnoreIntegerValue(Reader: TReader);
    procedure IgnoreFloatValue(Reader: TReader);
    procedure IgnoreBooleanValue(Reader: TReader);
    procedure IgnoreIdentValue(Reader: TReader);
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure BeforeDestruction; override;
    procedure Release; virtual;
    function Released: Boolean; deprecated 'Support for this method will be removed';
    /// <summary> Describes the current state of this instance. Indicates that a component needs to avoid certain
    /// actions. <para>See also <b>TComponent.ComponentState</b></para></summary>
    function ObjectState: TObjectState; deprecated 'Support for this funcionality will be removed';
    procedure SetRoot(ARoot: IRoot);
    { design }
    procedure SetDesign(Value: Boolean; SetChildren: Boolean = True);
    { clone }
    function Clone(const AOwner: TComponent): TFmxObject;
    { childs }
    procedure AddObject(const AObject: TFmxObject);
    procedure InsertObject(Index: Integer; const AObject: TFmxObject);
    procedure RemoveObject(const AObject: TFmxObject); overload;
    procedure RemoveObject(Index: Integer); overload;
    function ContainsObject(AObject: TFmxObject): Boolean; virtual;
    procedure Exchange(const AObject1, AObject2: TFmxObject); virtual;
    procedure DeleteChildren;
    function IsChild(AObject: TFmxObject): Boolean; virtual;
    procedure BringChildToFront(const Child: TFmxObject);
    procedure SendChildToBack(const Child: TFmxObject);
    procedure BringToFront; virtual;
    procedure SendToBack; virtual;
    procedure AddObjectsToList(const AList: TFmxObjectList);
    procedure Sort(Compare: TFmxObjectSortCompare); virtual;
    /// <summary>Loops through the children of this object, and runs the specified procedure once per object as the first parameter in each call.</summary>
    procedure EnumObjects(const Proc: TFunc<TFmxObject, TEnumProcResult>);
    { animation property }
    procedure AnimateFloat(const APropertyName: string; const NewValue: Single; Duration: Single = 0.2;
      AType: TAnimationType = TAnimationType.In; AInterpolation: TInterpolationType = TInterpolationType.Linear);
      deprecated 'Use FMX.Ani.TAnimator instead';
    procedure AnimateFloatDelay(const APropertyName: string; const NewValue: Single; Duration: Single = 0.2;
      Delay: Single = 0.0; AType: TAnimationType = TAnimationType.In;
      AInterpolation: TInterpolationType = TInterpolationType.Linear);
      deprecated 'Use FMX.Ani.TAnimator instead';
    procedure AnimateFloatWait(const APropertyName: string; const NewValue: Single; Duration: Single = 0.2;
      AType: TAnimationType = TAnimationType.In; AInterpolation: TInterpolationType = TInterpolationType.Linear);
      deprecated 'Use FMX.Ani.TAnimator instead';
    procedure AnimateInt(const APropertyName: string; const NewValue: Integer; Duration: Single = 0.2;
      AType: TAnimationType = TAnimationType.In; AInterpolation: TInterpolationType = TInterpolationType.Linear);
      deprecated 'Use FMX.Ani.TAnimator instead';
    procedure AnimateIntWait(const APropertyName: string; const NewValue: Integer; Duration: Single = 0.2;
      AType: TAnimationType = TAnimationType.In; AInterpolation: TInterpolationType = TInterpolationType.Linear);
      deprecated 'Use FMX.Ani.TAnimator instead';
    procedure AnimateColor(const APropertyName: string; NewValue: TAlphaColor; Duration: Single = 0.2;
      AType: TAnimationType = TAnimationType.In; AInterpolation: TInterpolationType = TInterpolationType.Linear);
      deprecated 'Use FMX.Ani.TAnimator instead';
    procedure StopPropertyAnimation(const APropertyName: string);
    { notify }
    procedure AddFreeNotify(const AObject: IFreeNotification);
    procedure RemoveFreeNotify(const AObject: IFreeNotification);
    { resource }
    function FindStyleResource(const AStyleLookup: string; const AClone: Boolean = False): TFmxObject; overload; virtual;
    { }
    property Root: IRoot read FRoot;
    property Stored: Boolean read FStored write SetStored;
    { tags }
    property TagObject: TObject read FTagObject write FTagObject;
    property TagFloat: Single read FTagFloat write FTagFloat;
    property TagString: string read FTagString write FTagString;
    { children }
    property ChildrenCount: Integer read GetChildrenCount;
    property Children: TFmxChildrenList read FChildrenList;
    property Data: TValue read GetData write SetData;
    property Parent: TFmxObject read FParent write SetParent;
    property Index: Integer read GetIndex write SetIndex;
    property ActionClient: boolean read GetActionClient;
  published
    property StyleName: string read FStyleName write SetStyleName;
  end;

  TTabList = class(TAggregatedObject, ITabList)
  strict private
    FTabList: TList<IControl>;
    procedure CreateTabList;
    function ParentIsRoot: Boolean;
  protected
    function IsAddable(const TabStop: IControl): Boolean; virtual;
  public
    constructor Create(const TabStopController: ITabStopController);
    destructor Destroy; override;
    procedure Clear;
    procedure Add(const TabStop: IControl); virtual;
    procedure Remove(const TabStop: IControl); virtual;
    procedure Update(const TabStop: IControl; const NewValue: TTabOrder);
    function IndexOf(const TabStop: IControl): Integer; virtual;
    function GetCount: Integer; virtual;
    function GetItem(const Index: Integer): IControl; virtual;
    function GetTabOrder(const TabStop: IControl): TTabOrder;
    function FindNextTabStop(const ACurrent: IControl; const AMoveForward: Boolean; const AClimb: Boolean): IControl;
  end;
  TTabListClass = class of TTabList;

{ TCustomPopupMenu }

  TCustomPopupMenu = class(TFmxObject)
  private
    [Weak] FPopupComponent: TComponent;
    FOnPopup: TNotifyEvent;
  protected
    procedure DoPopup; virtual;
    property OnPopup: TNotifyEvent read FOnPopup write FOnPopup;
  public
    procedure Popup(X, Y: Single); virtual; abstract;
    property PopupComponent: TComponent read FPopupComponent write FPopupComponent;
  end;

  TStandardGesture = (
    sgLeft            = sgiLeft,
    sgRight           = sgiRight,
    sgUp              = sgiUp,
    sgDown            = sgiDown,
    sgUpLeft          = sgiUpLeft,
    sgUpRight         = sgiUpRight,
    sgDownLeft        = sgiDownLeft,
    sgDownRight       = sgiDownRight,
    sgLeftUp          = sgiLeftUp,
    sgLeftDown        = sgiLeftDown,
    sgRightUp         = sgiRightUp,
    sgRightDown       = sgiRightDown,
    sgUpDown          = sgiUpDown,
    sgDownUp          = sgiDownUp,
    sgLeftRight       = sgiLeftRight,
    sgRightLeft       = sgiRightLeft,
    sgUpLeftLong      = sgiUpLeftLong,
    sgUpRightLong     = sgiUpRightLong,
    sgDownLeftLong    = sgiDownLeftLong,
    sgDownRightLong   = sgiDownRightLong,
    sgScratchout      = sgiScratchout,
    sgTriangle        = sgiTriangle,
    sgSquare          = sgiSquare,
    sgCheck           = sgiCheck,
    sgCurlicue        = sgiCurlicue,
    sgDoubleCurlicue  = sgiDoubleCurlicue,
    sgCircle          = sgiCircle,
    sgDoubleCircle    = sgiDoubleCircle,
    sgSemiCircleLeft  = sgiSemiCircleLeft,
    sgSemiCircleRight = sgiSemiCircleRight,
    sgChevronUp       = sgiChevronUp,
    sgChevronDown     = sgiChevronDown,
    sgChevronLeft     = sgiChevronLeft,
    sgChevronRight    = sgiChevronRight
  );

  TStandardGestures = set of TStandardGesture;

  TInteractiveGesture = (Zoom, Pan, Rotate, TwoFingerTap, PressAndTap, LongTap, DoubleTap);
  TInteractiveGestures = set of TInteractiveGesture;

  TCustomGestureManager = class;
  TCustomGestureCollection = class;
  TCustomGestureCollectionItem = class;

  TGestureType = (Standard, Recorded, Registered, None);
  TGestureTypes = set of TGestureType;

  TGestureOption = (UniDirectional, Skew, Endpoint, Rotate);
  TGestureOptions = set of TGestureOption;

  TGestureArray = array of TCustomGestureCollectionItem;
  TGesturePointArray = array of TPointF;

  TCustomGestureCollectionItem = class(TCollectionItem)
  strict protected
    function GetAction: TCustomAction; virtual; abstract;
    function GetDeviation: Integer; virtual; abstract;
    function GetErrorMargin: Integer; virtual; abstract;
    function GetGestureID: TGestureID; virtual; abstract;
    function GetGestureType: TGestureType; virtual; abstract;
    function GetName: string; virtual; abstract;
    function GetOptions: TGestureOptions; virtual; abstract;
    function GetPoints: TGesturePointArray; virtual; abstract;
    procedure SetAction(const Value: TCustomAction); virtual; abstract;
    procedure SetDeviation(const Value: Integer); virtual; abstract;
    procedure SetErrorMargin(const Value: Integer); virtual; abstract;
    procedure SetGestureID(const Value: TGestureID); virtual; abstract;
    procedure SetName(const Value: string); virtual; abstract;
    procedure SetOptions(const Value: TGestureOptions); virtual; abstract;
    procedure SetPoints(const Value: TGesturePointArray); virtual; abstract;
  public
    property Deviation: Integer read GetDeviation write SetDeviation default 20;
    property ErrorMargin: Integer read GetErrorMargin write SetErrorMargin default 20;
    property GestureID: TGestureID read GetGestureID write SetGestureID;
    property GestureType: TGestureType read GetGestureType;
    property Name: string read GetName write SetName;
    property Points: TGesturePointArray read GetPoints write SetPoints;
    property Action: TCustomAction read GetAction write SetAction;
    property Options: TGestureOptions read GetOptions write SetOptions default [TGestureOption.UniDirectional, TGestureOption.Rotate];
  end;

  TCustomGestureCollection = class(TCollection)
  protected
    function GetGestureManager: TCustomGestureManager; virtual; abstract;
    function GetItem(Index: Integer): TCustomGestureCollectionItem;
    procedure SetItem(Index: Integer; const Value: TCustomGestureCollectionItem);
  public
    function AddGesture: TCustomGestureCollectionItem; virtual; abstract;
    function FindGesture(AGestureID: TGestureID): TCustomGestureCollectionItem; overload; virtual; abstract;
    function FindGesture(const AName: string): TCustomGestureCollectionItem; overload; virtual; abstract;
    function GetUniqueGestureID: TGestureID; virtual; abstract;
    procedure RemoveGesture(AGestureID: TGestureID); virtual; abstract;
    property GestureManager: TCustomGestureManager read GetGestureManager;
    property Items[Index: Integer]: TCustomGestureCollectionItem read GetItem write SetItem; default;
  end;

  TCustomGestureEngine = class
  public type
    TGestureEngineFlag = (MouseEvents, TouchEvents);
    TGestureEngineFlags = set of TGestureEngineFlag;
  protected
    function GetActive: Boolean; virtual; abstract;
    function GetFlags: TGestureEngineFlags; virtual; abstract;
    procedure SetActive(const Value: Boolean); virtual; abstract;
  public
    constructor Create(const AControl: TComponent); virtual; abstract;
    procedure BroadcastGesture(const AControl: TComponent; EventInfo: TGestureEventInfo); virtual; abstract;
    property Active: Boolean read GetActive write SetActive;
    property Flags: TGestureEngineFlags read GetFlags;
  end;

  TCustomGestureManager = class(TComponent)
  protected
    function GetGestureList(AControl: TComponent): TGestureArray; virtual; abstract;
    function GetStandardGestures(AControl: TComponent): TStandardGestures; virtual; abstract;
    procedure SetStandardGestures(AControl: TComponent; AStandardGestures: TStandardGestures); virtual; abstract;
  public
    function AddRecordedGesture(const Item: TCustomGestureCollectionItem): TGestureID; overload; virtual; abstract;
    function FindCustomGesture(AGestureID: TGestureID): TCustomGestureCollectionItem; overload; virtual; abstract;
    function FindCustomGesture(const AName: string): TCustomGestureCollectionItem; overload; virtual; abstract;
    function FindGesture(const AControl: TComponent; AGestureID: TGestureID): TCustomGestureCollectionItem; overload; virtual; abstract;
    function FindGesture(const AControl: TComponent; const AName: string): TCustomGestureCollectionItem; overload; virtual; abstract;
    procedure RemoveActionNotification(Action: TCustomAction; Item: TCustomGestureCollectionItem); virtual;
    procedure RegisterControl(const AControl: TComponent); virtual; abstract;
    procedure RemoveRecordedGesture(AGestureID: TGestureID); overload; virtual; abstract;
    procedure RemoveRecordedGesture(const AGesture: TCustomGestureCollectionItem); overload; virtual; abstract;
    function SelectGesture(const AControl: TComponent; AGestureID: TGestureID): Boolean; overload; virtual; abstract;
    function SelectGesture(const AControl: TComponent; const AName: string): Boolean; overload; virtual; abstract;
    procedure UnregisterControl(const AControl: TComponent); virtual; abstract;
    procedure UnselectGesture(const AControl: TComponent; AGestureID: TGestureID); virtual; abstract;
    property GestureList[AControl: TComponent]: TGestureArray read GetGestureList;
    property StandardGestures[AControl: TComponent]: TStandardGestures read GetStandardGestures write SetStandardGestures;
  end;

  TCustomTouchManager = class(TPersistent)
  private
  type
    TObjectWrapper = class(TObject)
      [Weak] FObject : TComponent;
      constructor Create(const AObject: TComponent);
    end;
  private
    [Weak] FControl: TComponent;
    FGestureEngine: TCustomGestureEngine;
    FGestureManager: TCustomGestureManager;
    FInteractiveGestures: TInteractiveGestures;
    FDefaultInteractiveGestures: TInteractiveGestures;
    FStandardGestures: TStandardGestures;
    function GetStandardGestures: TStandardGestures;
    function IsInteractiveGesturesStored: Boolean;
    procedure SetInteractiveGestures(const Value: TInteractiveGestures);
    procedure SetGestureEngine(const Value: TCustomGestureEngine);
    procedure SetGestureManager(const Value: TCustomGestureManager);
    procedure SetStandardGestures(const Value: TStandardGestures);
    function GetGestureList: TGestureArray;
  protected
    procedure AssignTo(Dest: TPersistent); override;
    function IsDefault: Boolean;
  public
    constructor Create(AControl: TComponent);
    destructor Destroy; override;
    procedure ChangeNotification(const AControl: TComponent);
    function FindGesture(AGestureID: TGestureID): TCustomGestureCollectionItem; overload;
    function FindGesture(const AName: string): TCustomGestureCollectionItem; overload;
    procedure RemoveChangeNotification(const AControl: TComponent);
    function SelectGesture(AGestureID: TGestureID): Boolean; overload;
    function SelectGesture(const AName: string): Boolean; overload;
    procedure UnselectGesture(AGestureID: TGestureID); inline;
    property GestureEngine: TCustomGestureEngine read FGestureEngine write SetGestureEngine;
    property GestureList: TGestureArray read GetGestureList;
    property GestureManager: TCustomGestureManager read FGestureManager write SetGestureManager;
    property InteractiveGestures: TInteractiveGestures
      read FInteractiveGestures write SetInteractiveGestures stored IsInteractiveGesturesStored;
    property DefaultInteractiveGestures: TInteractiveGestures
      read FDefaultInteractiveGestures write FDefaultInteractiveGestures;
    property StandardGestures: TStandardGestures read GetStandardGestures write SetStandardGestures;
  end;

  TTouchManager = class(TCustomTouchManager)
  published
    property GestureManager;
    property InteractiveGestures;
  end;

  IGestureControl = interface
  ['{A263006D-3472-40F8-A917-F2221B48A459}']
    procedure BroadcastGesture(EventInfo: TGestureEventInfo);
    procedure CMGesture(var EventInfo: TGestureEventInfo);
    function TouchManager: TTouchManager;
    function GetFirstControlWithGesture(AGesture: TInteractiveGesture): TComponent;
    function GetFirstControlWithGestureEngine: TComponent;
    function GetListOfInteractiveGestures: TInteractiveGestures;
    procedure Tap(const Point: TPointF);
  end;

  IMultiTouch = interface
    ['{A263006D-3472-40F8-A917-F2221B48ABDD}']
    procedure MultiTouch(const Touches: TTouches; const Action: TTouchAction);
  end;

  ISizeGrip = interface
    ['{181729B7-53B2-45ea-97C7-91E1F3CBAABE}']
  end;

{ TLang }

  TLang = class(TFmxObject)
  private
    FLang: string;
    FResources: TStrings;
    FOriginal: TStrings;
    FAutoSelect: Boolean;
    FFileName: string;
    FStoreInForm: Boolean;
    procedure SetLang(const Value: string);
    function GetLangStr(const Index: string): TStrings;
  protected
    { vcl }
    procedure DefineProperties(Filer: TFiler); override;
    procedure ReadResources(Stream: TStream);
    procedure WriteResources(Stream: TStream);
    procedure Loaded; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure AddLang(const AName: string);
    procedure LoadFromFile(const AFileName: string);
    procedure SaveToFile(const AFileName: string);
    property Original: TStrings read FOriginal;
    property Resources: TStrings read FResources;
    property LangStr[const Index: string]: TStrings read GetLangStr;
  published
    property AutoSelect: Boolean read FAutoSelect write FAutoSelect default True;
    property FileName: string read FFileName write FFileName;
    property StoreInForm: Boolean read FStoreInForm write FStoreInForm default True;
    property Lang: string read FLang write SetLang;
  end;

{ TTimer }

  TTimerProc = procedure of object;

  IFMXTimerService = interface(IInterface)
    ['{856E938B-FF7B-4E13-85D4-3414A6A9FF2F}']
    function CreateTimer(Interval: Integer; TimerFunc: TTimerProc): TFmxHandle;
    function DestroyTimer(Timer: TFmxHandle): Boolean;
    function GetTick: Double;
  end;

  TTimer = class(TFmxObject)
  private
    FInterval: Cardinal;
    FTimerHandle: TFmxHandle;
    FOnTimer: TNotifyEvent;
    FEnabled: Boolean;
    FPlatformTimer: IFMXTimerService;
    procedure Timer;
  protected
    procedure SetEnabled(Value: Boolean); virtual;
    procedure SetInterval(Value: Cardinal); virtual;
    procedure SetOnTimer(Value: TNotifyEvent); virtual;
    procedure DoOnTimer; virtual;
    procedure UpdateTimer; virtual;
    procedure KillTimer; virtual;
    procedure Loaded; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Enabled: Boolean read FEnabled write SetEnabled default True;
    property Interval: Cardinal read FInterval write SetInterval default 1000;
    property OnTimer: TNotifyEvent read FOnTimer write SetOnTimer;
  end;

{ TLineInfo }

  PLineMetric = ^TLineMetric;
  TLineMetric = record
    Index: Integer;
    Len: Integer;
  end;

  TLineMetricInfo = class
  protected
    FLineMetrics: array of TLineMetric;
    function GetCount: Integer; virtual;
    function GetMetrics(Index: Integer): PLineMetric; virtual;
    procedure SetCount(const Value: Integer); virtual;
  public
    constructor Create;
    destructor Destroy; override;
    procedure Clear; virtual;
    property Count: Integer read GetCount write SetCount;
    property Metrics[ind: Integer]: PLineMetric read GetMetrics;
  end;

{ TGuillotineBinPack }

  TFreeChoiceHeuristic = (BestAreaFit, BestShortSideFit, BestLongSideFit, WorstAreaFit, WorstShortSideFit,
    WorstLongSideFit);

  TSplitMethodHeuristic = (ShorterLeftoverAxis, LongerLeftoverAxis, MinimizeArea, MaximizeArea, ShorterAxis,
    LongerAxis);

  TGuillotineBinPack = class
  private
    FSize: TPoint;
    FUsedRectangles: TList<TRect>;
    FFreeRectangles: TList<TRect>;
    FSupportsRectangleInversion: Boolean;
    FUsedRectangleArea: Integer;

    function ScoreByHeuristic(const NodeSize: TPoint; const FreeRect: TRect;
      const Heuristic: TFreeChoiceHeuristic): Integer;

    procedure FindPositionForNewNode(const NodeSize: TPoint; const Heuristic: TFreeChoiceHeuristic;
      out NodeIndex: Integer; out NodeRect: TRect);

    procedure SplitFreeRectAlongAxis(const FreeRect, PlacedRect: TRect; const SplitHorizontal: Boolean);
    procedure SplitFreeRectByHeuristic(const FreeRect, PlacedRect: TRect; const AMethod: TSplitMethodHeuristic);

    function GetOccupancy: Single;
  public
    constructor Create; overload;
    constructor Create(const ASize: TPoint); overload;
    destructor Destroy; override;

    procedure Init(const ASize: TPoint);
    procedure MergeFreeList;

    function Insert(const NodeSize: TPoint; const Merge: Boolean = True;
      const FreeChoice: TFreeChoiceHeuristic = TFreeChoiceHeuristic.BestAreaFit;
      const SplitMethod: TSplitMethodHeuristic = TSplitMethodHeuristic.MinimizeArea): TRect;

    property Size: TPoint read FSize;
    property Occupancy: Single read GetOccupancy;
    property SupportsRectangleInversion: Boolean read FSupportsRectangleInversion write FSupportsRectangleInversion;
  end;

  EGraphicsException = class(Exception);
  ECannotDetermineDirect3DLevel = class(EGraphicsException);
  ECannotCreateD3DDevice = class(EGraphicsException);
  ECannotCreateD2DFactory = class(EGraphicsException);
  ECannotCreateDWriteFactory = class(EGraphicsException);
  ECannotCreateWICImagingFactory = class(EGraphicsException);
  ECannotCreateRenderTarget = class(EGraphicsException);
  ECannotCreateTexture = class(EGraphicsException);
  ECannotCreateSwapChain = class(EGraphicsException);
  ERetrieveSurfaceContents = class(EGraphicsException);
  ECannotCreateRenderTargetView = class(EGraphicsException);
  ECannotResizeBuffers = class(EGraphicsException);
  EBitmapSizeTooBig = class(Exception);
  EBitmapLoadingFailed = class(Exception);
  EThumbnailLoadingFailed = class(Exception);
  EBitmapSavingFailed = class(Exception);
  EBitmapFormatUnsupported = class(Exception);
  EBitmapIncorrectSize = class(Exception);
  ERetrieveSurfaceDescription = class(Exception);
  EAcquireBitmapAccess = class(Exception);
  EVideoCaptureFault = class(Exception);
  EInvalidCallingConditions = class(Exception);
  EInvalidRenderingConditions = class(Exception);
  ETextureSizeTooSmall = class(Exception);
  ECannotAcquireBitmapAccess = class(Exception);
  ECannotFindSuitablePixelFormat = class(Exception);
  ECannotFindShader = class(Exception);
  ECannotCreateDirect3D = class(Exception);
  ECannotAcquireDXGIFactory = class(Exception);
  ECannotAssociateWindowHandle = class(Exception);
  ECannotRetrieveDisplayMode = class(Exception);
  ECannotRetrieveBufferDesc = class(Exception);
  ECannotCreateSamplerState = class(Exception);
  ECannotRetrieveSurface = class(Exception);
  ECannotUploadTexture = class(Exception);
  ECannotActivateTexture = class(Exception);
  ECannotAcquireTextureAccess = class(Exception);
  ECannotCopyTextureResource = class(Exception);
  ECannotActivateFrameBuffers = class(Exception);
  ECannotCreateRenderBuffers = class(Exception);
  ECannotRetrieveRenderBuffers = class(Exception);
  ECannotActivateRenderBuffers = class(Exception);
  ECannotBeginRenderingScene = class(Exception);
  ECannotSyncDeviceBuffers = class(Exception);
  ECannotUploadDeviceBuffers = class(Exception);
  ECannotCreateDepthStencil = class(Exception);
  ECannotRetrieveDepthStencil = class(Exception);
  ECannotActivateDepthStencil = class(Exception);
  ECannotResizeSwapChain = class(Exception);
  ECannotActivateSwapChain = class(Exception);
  ECannotCreateVertexShader = class(Exception);
  ECannotCreatePixelShader = class(Exception);
  ECannotCreateVertexLayout = class(Exception);
  ECannotCreateVertexDeclaration = class(Exception);
  ECannotCreateVertexBuffer = class(Exception);
  ECannotCreateIndexBuffer = class(Exception);
  EShaderCompilationError = class(Exception);
  EProgramCompilationError = class(Exception);
  ECannotFindShaderVariable = class(Exception);
  ECannotActivateShaderProgram = class(Exception);
  ECannotCreateOpenGLContext = class(Exception);
  ECannotUpdateOpenGLContext = class(Exception);
  ECannotDrawMeshObject = class(Exception);
  EFeatureNotSupported = class(Exception);
  EErrorCompressingStream = class(Exception);
  EErrorDecompressingStream = class(Exception);
  EErrorUnpackingShaderCode = class(Exception);

  ///<summary>Provider a persistent object for the designer. A different TPersistent can be routed into the
  /// designer using this interface. This can be used to expose properties of non-controls in the
  /// Object Inspector.</summary>
  IPersistentProvider = interface
    ['{B0B03758-A2F5-49B9-9A39-C2C2405B2EAD}']
    ///<summary>Return the provided persistent</summary>
    function GetPersistent: TPersistent;
  end;

  ///<summary>Shim is a representative of a visual non-control object in the Designer. The shim needs to implement
  /// this interface in order to let the Designer know about its bounding rectangles.
  ///</summary>
  IPersistentShim = interface
    ['{B6F815C7-BFD1-489D-A661-0CD4639EC920}']
    ///<summary>Return bounding rectangle of shim.</summary>
    function GetBoundsRect: TRect;
  end;

  ///<summary>Extension of TPersistent directly exposed to the Designer.</summary>
  IDesignablePersistent = interface
    ['{4A731994-9060-4F3C-92D7-C123B04601D4}']
    ///<summary>GetDesignParent should return a TPersistent known to the designer, e.g. its parent TControl.</summary>
    function GetDesignParent: TPersistent;
    ///<summary>Bounding rectangle representing this TPersistent in the designer</summary>
    function GetBoundsRect: TRect;
    ///<summary>
    /// Bind this persistent with its shim, thus enabling GetBoundsRect without using the host.
    /// Example: TItemAppearanceProperties as IDesignablePersistent are bound to the TListItemShim
    ///          Their counterpart FmxReg.TListViewObjectsProperties are bound to the same TListItemShim
    ///</summary>
    procedure Bind(AShim: IPersistentShim);
    ///<summary>
    /// Unbind this persistent. The implementation would normally clear its reference to IPersistentShim.
    ///</summary>
    procedure Unbind;
    ///<summary>True if this TPersistent is currently in Design mode and wants the Designer to create
    ///IItem for itself.</summary>
    function BeingDesigned: Boolean;
  end;

  ///<summary>Interface for TPersistent to receive bounding rectangle changes from the Designer.</summary>
  IMovablePersistent = interface
    ['{A86F9221-09E9-40A7-AF0E-5C3EB859C297}']
    /// <summary>Set bounds rectangle.</summary>
    procedure SetBoundsRect(const AValue: TRect);
  end;

  ///<summary>Interface that allows binding a TPersistent with a TreeView Sprig in StructureView</summary>
  ISpriggedPersistent = interface
    ['{0F1D325A-8082-4DEA-8ABF-56A359A218A4}']
    /// <summary>Set link to a TreeView sprig specified by APersistent. nil to break the link.</summary>
    procedure SetSprig(const APersistent: TPersistent);
    /// <summary>Get link to a TreeView sprig. Returns nil if link does not exist.</summary>
    function GetSprig: TPersistent;
  end;


{ Pixel Formats }

function PixelToFloat4(Input: Pointer; InputFormat: TPixelFormat): TAlphaColorF;
procedure Float4ToPixel(const Input: TAlphaColorF; Output: Pointer; OutputFormat: TPixelFormat);

function PixelToAlphaColor(Input: Pointer; InputFormat: TPixelFormat): TAlphaColor;
procedure AlphaColorToPixel(Input: TAlphaColor; Output: Pointer; OutputFormat: TPixelFormat);

procedure ScanlineToAlphaColor(Input: Pointer; Output: PAlphaColor; PixelCount: Integer; InputFormat: TPixelFormat);
procedure AlphaColorToScanline(Input: PAlphaColor; Output: Pointer; PixelCount: Integer; OutputFormat: TPixelFormat);
procedure ChangePixelFormat(const AInput: Pointer; const AOutput: Pointer; const APixelCount: Integer;
                            const AInputFormat, AOutputFormat: TPixelFormat);

function PixelFormatToString(Format: TPixelFormat): string;
function FindClosestPixelFormat(Format: TPixelFormat; const FormatList: TPixelFormatList): TPixelFormat;

{ Resources }

type
  TCustomFindStyleResource = function(const AStyleLookup: string; const Clone: Boolean = False): TFmxObject of object;

procedure AddCustomFindStyleResource(const ACustomProc: TCustomFindStyleResource);
procedure RemoveCustomFindStyleResource(const ACustomProc: TCustomFindStyleResource);

procedure AddResource(const AObject: TFmxObject);
procedure RemoveResource(const AObject: TFmxObject);
function FindStyleResource(const AStyleLookup: string; const Clone: Boolean = False): TFmxObject;

{ Lang }

procedure LoadLangFromFile(const AFileName: string);
procedure LoadLangFromStrings(const AStr: TStrings);
procedure ResetLang;

{ Align }

procedure ArrangeControl(const Control: IAlignableObject; AAlign: TAlignLayout; const AParentWidth, AParentHeight: Single;
  const ALastWidth, ALastHeight: Single; var R: TRectF);

procedure AlignObjects(const AParent: TFmxObject; APadding: TBounds; AParentWidth, AParentHeight: Single;
  var ALastWidth, ALastHeight: Single; var ADisableAlign: Boolean);

procedure RecalcAnchorRules(const Parent : TFmxObject; Anchors : TAnchors; const BoundsRect : TRectF;
  var AOriginalParentSize:TPointF; var AAnchorOrigin:TPointF; var AAnchorRules:TPointF);
procedure RecalcControlOriginalParentSize(const Parent: TFmxObject; ComponentState : TComponentState;
  const Anchoring: Boolean; var AOriginalParentSize : TPointF);

type
  TCustomTranslateProc = function(const AText: string): string;

var
  CustomTranslateProc: TCustomTranslateProc;

{ This function use to collect string which can be translated. Just place this function at Application start. }

procedure CollectLangStart;
procedure CollectLangFinish;
{ This function return Strings with collected text }
function CollectLangStrings: TStrings;

function Translate(const AText: string): string;
function TranslateText(const AText: string): string;

{ Four 2D corners describing arbitrary rectangle. }

function CornersF(Left, Top, Width, Height: Single): TCornersF; overload;
function CornersF(const Pt1, Pt2, Pt3, Pt4: TPointF): TCornersF; overload;
function CornersF(const Rect: TRect): TCornersF; overload;
function CornersF(const Rect: TRectF): TCornersF; overload;

{ Helper functions }

function IsHandleValid(Hnd: TFmxHandle): Boolean;

procedure RegisterFmxClasses(const RegClasses: array of TPersistentClass); overload;
procedure RegisterFmxClasses(const RegClasses: array of TPersistentClass;
  const GroupClasses: array of TPersistentClass); overload;

var
  AnchorAlign: array [TAlignLayout] of TAnchors = (
    { TAlignLayout.None }
    [TAnchorKind.akLeft,
     TAnchorKind.akTop],

    { TAlignLayout.Top }
    [TAnchorKind.akLeft,
     TAnchorKind.akTop,
     TAnchorKind.akRight],

    { TAlignLayout.Left }
    [TAnchorKind.akLeft,
     TAnchorKind.akTop,
     TAnchorKind.akBottom],

    { TAlignLayout.Right }
    [TAnchorKind.akRight,
     TAnchorKind.akTop,
     TAnchorKind.akBottom],

    { TAlignLayout.Bottom }
    [TAnchorKind.akLeft,
     TAnchorKind.akRight,
     TAnchorKind.akBottom],

    { TAlignLayout.MostTop }
    [TAnchorKind.akLeft,
     TAnchorKind.akTop,
     TAnchorKind.akRight],

    { TAlignLayout.MostBottom }
    [TAnchorKind.akLeft,
     TAnchorKind.akRight,
     TAnchorKind.akBottom],

    { TAlignLayout.MostLeft }
    [TAnchorKind.akLeft,
     TAnchorKind.akTop,
     TAnchorKind.akBottom],

    { TAlignLayout.MostRight }
    [TAnchorKind.akRight,
     TAnchorKind.akTop,
     TAnchorKind.akBottom],

    { TAlignLayout.Client }
    [TAnchorKind.akLeft,
     TAnchorKind.akTop,
     TAnchorKind.akRight,
     TAnchorKind.akBottom],

    { TAlignLayout.Contents }
    [TAnchorKind.akLeft,
     TAnchorKind.akTop,
     TAnchorKind.akRight,
     TAnchorKind.akBottom],

    { TAlignLayout.Center }
    [],

    { TAlignLayout.VertCenter }
    [TAnchorKind.akLeft,
     TAnchorKind.akRight],

    { TAlignLayout.HorzCenter }
    [TAnchorKind.akTop,
     TAnchorKind.akBottom],

    { vaHorizintal }
    [TAnchorKind.akLeft,
     TAnchorKind.akRight],

    { TAlignLayout.Vertical }
    [TAnchorKind.akTop,
     TAnchorKind.akBottom],

    { TAlignLayout.Scale }
    [TAnchorKind.akLeft,
     TAnchorKind.akTop,
     TAnchorKind.akRight,
     TAnchorKind.akBottom],

    { TAlignLayout.Fit }
    [TAnchorKind.akLeft,
     TAnchorKind.akTop,
     TAnchorKind.akRight,
     TAnchorKind.akBottom],

    { TAlignLayout.FitLeft }
    [TAnchorKind.akLeft,
     TAnchorKind.akTop,
     TAnchorKind.akRight,
     TAnchorKind.akBottom],

    { TAlignLayout.FitRight }
    [TAnchorKind.akLeft,
     TAnchorKind.akTop,
     TAnchorKind.akRight,
     TAnchorKind.akBottom]
  );

{ Debugging }
type
  /// <summary>Provides static methods for debug messages.</summary>
  Log = class abstract
  strict private
    class var FLogger: IInterface;
    class function GetLogger: IInterface; static;
  protected
    /// <summary>Referece to the logger service.</summary>
    class property Logger: IInterface read GetLogger;
  public type
    /// <summary>A conversion function used to convert array elements in ArrayToString</summary>
    TToStringFunc = reference to function(const AObject: TObject): string;
    /// <summary>A timestamp of specific point in procedure execution. TLogMarks are used by Log.Trace.
    /// See Trace and TLogToken.</summary>
    TLogMark = record
      /// <summary>A short message</summary>
      Msg: string;
      /// <summary>Timestamp</summary>
      Time: TDateTime;
    end;
    /// <summary>A token received in Trace callback. Token can be used to mark specific points in time during
    ///  procedure execution. Use Mark(Message) to mark specific moment in time. Marks will be printed
    /// in sequence with their elapsed times in Trace output.</summary>
    TLogToken = class
    private
      FMarks: TList<Log.TLogMark>;
      function GetMarkAt(const Index: Integer): TLogMark;
      function GetCount: Integer;
    protected
      constructor Create;
    public
      /// <summary>Mark time during timed execution of a procedure.</summary>
      procedure Mark(const Msg: string);
      /// <summary>Get a mark at Index.</summary>
      property MarkAt[const Index: Integer]: TLogMark read GetMarkAt;
      /// <summary>Count of accumulated Marks.</summary>
      property Count: Integer read GetCount;
    end;
  public
    /// <summary>Log a debug message. Same arguments as Format.</summary>
    class procedure d(const Fmt: string; const Args: array of const); overload;
    /// <summary>Log a simple debug message.</summary>
    class procedure d(const Msg: string); overload; inline;
    /// <summary>Log a debug message with Tag, object data of Instance, Method that invokes the logger and message Msg.
    /// </summary>
    class procedure d(const Tag: string; const Instance: TObject; const Method, Msg: string); overload; inline;
    /// <summary>Log a debug message with Tag, object data of Instance and a message Msg</summary>
    class procedure d(const Tag: string; const Instance: TObject; const Msg: string); overload; inline;
    /// <summary>Log a time stamp with message Msg</summary>
    class procedure TimeStamp(const Msg: string); overload;
    /// <summary>Perform a timed execution of Func and print execution times, return function result.
    /// Proc receives a parameter TLogToken which can be used to mark specific points where timestamps should be taken
    /// in addition to complete procedure time.</summary>
    class function Trace<TResult>(const Tag: string; const Func: TFunc<TLogToken, TResult>;
      const Threshold: Integer = -1): TResult; overload;
    /// <summary>A convenience variant of Trace&lt;TResult&gt; when token is not needed.</summary>
    class function Trace<TResult>(const Tag: string; const Func: TFunc<TResult>; const Threshold: Integer = -1): TResult; overload;
    /// <summary>A convenience variant of Trace&lt;TResult&gt; for procedures.</summary>
    class procedure Trace(const Tag: string; const Proc: TProc<TLogToken>; const Threshold: Integer = -1); overload;
    /// <summary>A convenience variant of Trace&lt;TResult&gt; for procedures when token is not needed.</summary>
    class procedure Trace(const Tag: string; const Proc: TProc; const Threshold: Integer = -1); overload;
    /// <summary>Get a basic string representation of an object, consisting of ClassName and its pointer</summary>
    class function ObjToString(const Instance: TObject): string;
    /// <summary>Get a string representation of array using MakeStr function to convert individual elements.</summary>
    class function ArrayToString(const AArray: TEnumerable<TFmxObject>; const MakeStr: TToStringFunc): string; overload;
    /// <summary>Get a string representation of array using TObject.ToString to convert individual elements.</summary>
    class function ArrayToString(const AArray: TEnumerable<TFmxObject>): string; overload;
    /// <summary>Dump complete TFmxObject with all its children.</summary>
    class procedure DumpFmxObject(const AObject: TFmxObject; const Nest: Integer = 0);
  end;

/// <summary>Removes the ampersand '&' characters  of the Text string.</summary>
function DelAmp(const AText: string): string;


type
  TEnumerableFilter<F; T: TFmxObject> = class(TEnumerable<T>)
  private
    FBaseEnum: TEnumerable<F>;
    FSelfDestruct: Boolean;
    FPredicate: TPredicate<T>;
  protected
    function DoGetEnumerator: TEnumerator<T>; override;
  public
    constructor Create(const FullEnum: TEnumerable<F>; SelfDestruct: Boolean = False; const Pred: TPredicate<T> = nil);
    class function Filter(const Src: TEnumerable<F>; const Predicate: TPredicate<T> = nil): TEnumerableFilter<F,T>;

  type
    TFilterEnumerator = class(TEnumerator<T>)
    private
      FCleanup: TEnumerableFilter<F,T>;
      FRawEnumerator: TEnumerator<F>;
      FCurrent: T;
      FPredicate: TPredicate<T>;
      function GetCurrent: T;
    protected
      function DoGetCurrent: T; override;
      function DoMoveNext: Boolean; override;
    public
      constructor Create(const Enumerable: TEnumerable<F>; const Cleanup: TEnumerableFilter<F,T>;
        const Pred: TPredicate<T>);
      destructor Destroy; override;
      property Current: T read GetCurrent;
      function MoveNext: Boolean;
    end;
  end;

  TIdleMessage = class(System.Messaging.TMessage)
  end;

  /// <summary>Information about display.</summary>
  TDisplay = record
    /// <summary>The unique id of display.</summary>
    Id: NativeUInt;
    /// <summary>Index is the same as MonitorNum. Added for the sake of brevity.</summary>
    Index: Integer;
    /// <summary>Is this the main display in the system?</summary>
    Primary: Boolean;
    /// <summary>Screen size (dp) without taking into account the taskbar and other decorative elements.</summary>
    /// <remarks>The Windows platform doesn't allow to determinate logical position of screen definitely.</remarks>
    Bounds: TRectF;
    /// <summary>Screen size (px) without taking into account the taskbar and other decorative elements.</summary>
    PhysicalBounds: TRect;
    /// <summary>Screen size (dp) minus the taskbar, and other decorative items.</summary>
    Workarea: TRectF;
    /// <summary>Screen size (px) minus the taskbar, and other decorative items.</summary>
    PhysicalWorkarea: TRect;
    /// <summary>Display scale.</summary>
    Scale: Single;
    /// <summary>It is the same as Bounds.</summary>
    function BoundsRect: TRectF;
    /// <summary>It is the same as Workarea.</summary>
    function WorkareaRect: TRectF;

    constructor Create(const AIndex: Integer; const APrimary: Boolean; const ABounds, AWorkArea: TRectF);
  end;

/// <summary>Registers the flasher class for the TCustomCaret object specified
/// in the CaretClass parameter.</summary>
procedure RegisterFlasherClass(const FlasherClass: TFmxObjectClass; const CaretClass: TCaretClass);
/// <summary>Returns the class of a flasher registered for the TCustomCaret
/// object specified in the CaretClass parameter.</summary>
function FlasherClass(const CaretClass: TCaretClass): TFmxObjectClass;
/// <summary>Returns the flasher object registered for the TCustomCaret object
/// specified in the CaretClass parameter.</summary>
function Flasher(const CaretClass: TCaretClass): TFmxObject;
/// <summary>Checks whether a flasher is registered for the TCustomCaret object
/// specified in the CaretClass parameter.</summary>
function AssignedFlasher(const CaretClass: TCaretClass): boolean;

type
  TShowVirtualKeyboard = procedure (const Displayed: boolean;
                                    const Caret: TCustomCaret;
                                    var VirtualKeyboardState: TVirtualKeyboardStates);

procedure RegisterShowVKProc(const ShowVirtualKeyboard: TShowVirtualKeyboard);

var
  SharedContext: TRttiContext;
  ClonePropertiesCache: TDictionary<string, TList<TRttiProperty>>;

type
  TKeyKind = (Usual, Functional, Unknown);

//== INTERFACE END: FMX.Types
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Controls.Model (from FMX.Controls.Model.pas)
//==================================================================================================


const
  MM_BASE = $1600;
  MM_GETDATA = MM_BASE + 1;
  MM_DATA_CHANGED = MM_BASE + 2;
  MM_USER = $1700;

type

{ TDataModel }

  /// <summary>Key-value pair where the key is a string and the value is an instance of TValue. Used for sending data
  // to presentation layer.</summary>
  TDataRecord = TPair<string, TValue>;

  /// <summary>Class that contains a dictionary of key-value pairs and may be used as model by an instance of
  /// <c>TPresentedControl</c> with supporting a sending a notification via messaging.</summary>
  TDataModel = class(TMessageSender)
  public type
    TDataSource = TDictionary<string, TValue>;
  private
    [Weak] FOwner: TComponent;
    FDataSource: TDataSource;
    function GetData(const Index: string): TValue;
    procedure SetData(const Index: string; const Value: TValue);
    procedure RemoveData(const Index: string);
  protected
    { IInterface }
    function QueryInterface(const IID: TGUID; out Obj): HResult; virtual; stdcall;
    function _AddRef: Integer; stdcall;
    function _Release: Integer; stdcall;
  public
    /// <summary>Allows to specify <c>Owner</c></summary>
    /// <remarks>Invokes default constructor without params.</remarks>
    constructor Create(const AOwner: TComponent); overload; virtual;
    /// <summary>Destroys existed <c>DataSource</c></summary>
    destructor Destroy; override;
  public
    /// <summary>Component that is responsible for destroying this data model once the data model is no longer
    /// necessary.</summary>
    property Owner: TComponent read FOwner;
    /// <summary><para>Value on the data model for the specified key.</para><para>Use it for sending any kind of data to
    /// presentation layer without creating custom model class.</para></summary>
    /// <remarks><para>Automatically sends notifcation message with id <c>MM_DATA_CHANGED</c> to receiver with information
    /// about key and value through using <c>TDataRecord</c>.</para><para>When we request value from model, Model
    /// sends request about it to presentation layer. If layer doesn't specify value (nil value), model gets value
    /// from DataSource</para><para>If value is nil, model will remove this key-value pair from <c>DataSource</c></para></remarks>
    property Data[const Key: string]: TValue read GetData write SetData;
    /// <summary>Dictionary of key-value pairs that are the data that the data model contains. Can be nil, if Model
    /// doesn't have any datas.</summary>
    property DataSource: TDataSource read FDataSource;
  end;

  /// <summary>Class reference of TDataModel.</summary>
  TDataModelClass = class of TDataModel;

//== INTERFACE END: FMX.Controls.Model
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.AcceleratorKey (from FMX.AcceleratorKey.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  /// <summary>This is an interface that descendant classes must implement to in order to be a accelerator key
  /// receiver.</summary>
  IAcceleratorKeyReceiver = interface
    ['{1C679082-65F2-4C54-A2C4-CD4C00E2C465}']
    /// <summary>True if the objects can trigger the action, False otherwise.</summary>
    /// <remarks>Even if an object can trigger an action because it is registered as an accelerator key receiver, it is
    /// possible that the object may not want to react with the accelerator key event. For example, a submenu that is
    /// hidden, or a tab page that is hidden.</remarks>
    function CanTriggerAcceleratorKey: Boolean;
    /// <summary>This method is invoked to allow the object to do everything it wants as a response to accelerator key
    /// The default behaviour is to focus the control.</summary>
    procedure TriggerAcceleratorKey;
    /// <summary>Returns the character key which serves as the keyboard accelerator for this receiver.</summary>
    function GetAcceleratorChar: Char;
    /// <summary>Returns the index of the accelerator character within the text string of the receiver. This information
    /// is typically used to highlight the accelerator character.</summary>
    function GetAcceleratorCharIndex: Integer;
  end;

  /// <summary>Platform service to provide support for accelerator keys for quick keyboard access to controls.</summary>
  IFMXAcceleratorKeyRegistryService = interface
    ['{0D06B7CC-FAF2-45F8-B7AA-D4B84FD384B7}']
    /// <summary>This method registers an object as a Receiver of accelerator keys for a given root container (typically
    /// a form). If the object is already added, this procedure has no effect.</summary>
    procedure RegisterReceiver(const ARoot: IRoot; const AReceiver: IAcceleratorKeyReceiver);
    /// <summary>Removes the object from the database for a particular root container (typically a form). If the object
    /// is not in the database, it has no effect.</summary>
    procedure UnregisterReceiver(const ARoot: IRoot; const AReceiver: IAcceleratorKeyReceiver);
    /// <summary>Removes the entire registry of accelerator keys for a given root container (form).</summary>
    procedure RemoveRegistry(const ARoot: IRoot);
    /// <summary>Emits the accelerator key to the given root container (typically a form). If the root container has a
    /// control which can receive the accelerator key, then the accelerator action is triggered.</summary>
    function EmitAcceleratorKey(const ARoot: IRoot; const AChar: Char): Boolean;
    /// <summary>This method unregisters the receiver from the old root, and registers the receiver into the new root.
    /// To be registered or unregistered, any root must support the IAcceleratorKeyRegistry interface.</summary>
    procedure ChangeReceiverRoot(const AReceiver: IAcceleratorKeyReceiver; const AOldRoot, ANewRoot: IRoot);
    /// <summary>Processes the AText parameter string to identify any embedded accelerator key markers (the ampersand
    /// symbol). If found, Key and KeyIndex will be returned with the accelerator character and the
    /// position at which is was found. If no accelerator key is indicated in the text string, Key will be a null
    /// character and KeyIndex will be -1.</summary>
    procedure ExtractAcceleratorKey(const AText: string; out Key: Char; out KeyIndex: Integer);
  end;

//== INTERFACE END: FMX.AcceleratorKey
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Styles (from FMX.Styles.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  TStyleSignature = array [0..12] of Byte;

const
  // Sign is "FMX_STYLE 2.0"
  FireMonkeyStyleSign: TStyleSignature =
    (Byte('F'), Byte('M'), Byte('X'), Byte('_'),
     Byte('S'), Byte('T'), Byte('Y'), Byte('L'), Byte('E'), Byte(' '),
     Byte('2'), Byte('.'), Byte('0'));
  // Sign is "FMX_STYLE 2.5"
  FireMonkey25StyleSign: TStyleSignature =
    (Byte('F'), Byte('M'), Byte('X'), Byte('_'),
     Byte('S'), Byte('T'), Byte('Y'), Byte('L'), Byte('E'), Byte(' '),
     Byte('2'), Byte('.'), Byte('5'));

type
  EStyleException = class(Exception);

  TStyleFormat = (Indexed, Binary, Text);

  TStyleDescription = class(TFmxObject)
  private type
    TProperty = (Author, AuthorEMail, PlatformTarget, MobilePlatform, Title, Version);
  private const
    /// <summary>List of published properties used in streaming</summary>
    Properties: array [TProperty] of string = ('Author', 'AuthorEMail', 'PlatformTarget', 'MobilePlatform', 'Title',
      'Version');
  public const
    /// <summary>Target's names that used in style file</summary>
    PlatformTargets: array [TOSPlatform] of string = ('[WINDOWS]', '[MACOS]', '[IOS7]', '[ANDROID]', '[LINUX]');
    /// <summary>Platform's names that used at framework</summary>
    PlatformNames: array [TOSPlatform] of string = ('Windows', 'OSX', 'iOS', 'Android', 'Linux');
  private
    FAuthor: string;
    FVersion: string;
    FTitle: string;
    FAuthorEMail: string;
    FPlatformTarget: string;
    FMobilePlatform: Boolean;
    FAuthorURL: string;
    class function TryLoadFromStream(const Stream: TStream; var StyleDescription: TStyleDescription): Boolean;
  protected
    procedure DefineProperties(Filer: TFiler); override;
  public
    function Equals(Obj: TObject): Boolean; override;
    /// <summary>Allows to check style for fitting for specified Platform</summary>
    function SupportsPlatform(const APlatform: TOSPlatform): Boolean;
  published
    property Author: string read FAuthor write FAuthor;
    property AuthorEMail: string read FAuthorEMail write FAuthorEMail;
    property AuthorURL: string read FAuthorURL write FAuthorURL;
    property PlatformTarget: string read FPlatformTarget write FPlatformTarget;
    property MobilePlatform: Boolean read FMobilePlatform write FMobilePlatform;
    property Title: string read FTitle write FTitle;
    property Version: string read FVersion write FVersion;
  end;

  TStyleTag = class(TFmxObject)
  published
    property Tag;
    property TagFloat;
    property TagString;
  end;

  IBinaryStyleContainer = interface
  ['{76589FDB-7430-4F7A-A993-44AB1664BCFD}']
    procedure ClearContainer;
    procedure AddBinaryFromStream(const Name: string; const SourceStream: TStream; const Size: Int64);
    /// <summary>Force to load all style's objects from binary stream.</summary>
    procedure UnpackAllBinaries;
  end;

  TSupportedPlatformHook = function (const PlatformTarget: string): Boolean;

  TStyleStreaming = class
  private type
    TIndexItem = record
      Name: string;
      Size: Int64;
    end;
  private class var
    FDefaultContainerClass: TFmxObjectClass;
    FSupportedPlatformHook: TSupportedPlatformHook;
  private
    class function ReadHeader(const AStream: TStream): TArray<TIndexItem>;
    class function LoadFromIndexedStream(const AStream: TStream): TFmxObject;
    class procedure SaveToIndexedStream(const Style: TFmxObject; const AStream: TStream); static;
    class function IsSupportedPlatformTarget(const PlatformTarget: string): Boolean; static;
    class function SameStyleDecription(const Style1, Style2: TFmxObject): Boolean; static;
    class function SameObject(const Obj1, Obj2: TFmxObject): Boolean; static;
    class function CompareSign(const Sign1, Sign2: TStyleSignature): Boolean;
    class function TryLoadStyleDescriptionFromIndexedStream(const Stream: TStream;
      var Description: TStyleDescription): Boolean; static;
  public
    class function DefaultIsSupportedPlatformTarget(const PlatformTarget: string): Boolean; static;

    class procedure SaveToStream(const Style: TFmxObject; const AStream: TStream;
      const Format: TStyleFormat = TStyleFormat.Indexed);

    /// <summary>Try to parse styel file and read style description. Description object should be destroyed by caller.</summary>
    class function TryLoadStyleDescription(const Stream: TStream; var Description: TStyleDescription): Boolean;

    class function LoadFromFile(const FileName: string): TFmxObject;
    class function LoadFromStream(const AStream: TStream): TFmxObject;
    class function LoadFromResource(Instance: HINST; const ResourceName: string; ResourceType: PChar): TFmxObject;

    class function CanLoadFromFile(const FileName: string): Boolean;
    class function CanLoadFromStream(const AStream: TStream):  Boolean;
    class function CanLoadFromResource(const ResourceName: string; ResourceType: PChar): Boolean; overload;
    class function CanLoadFromResource(Instance: HINST; const ResourceName: string; ResourceType: PChar): Boolean; overload;

    class function SameStyle(const Style1, Style2: TFmxObject): Boolean; static;

    class procedure SetDefaultContainerClass(const AClass: TFmxObjectClass);
    class procedure SetSupportedPlatformHook(const AHook: TSupportedPlatformHook);
  end;

  /// <summary>This procedure return correct resource name if more than one is registered for platform.</summary>
  TPlatformStyleSelectionProc = function (const APlatform: TOSPlatform): string;
  /// <summary>Anonymous method that EnumStyleResources calls in order to
  /// enumerate all the registered style resources.</summary>
  TStyleResourceEnumProc = reference to procedure (const AResourceName: string; const APlatform: TOSPlatform);

  TStyleManager = class sealed
  strict private type
    TStyleManagerNotification = class(TFmxObject)
    protected
      procedure FreeNotification(AObject: TObject); override;
    end;
  strict private
    class var FStyleManagerNotification: TStyleManagerNotification;
    class var FPlatformResources: TDictionary<string, TOSPlatform>;
    class var FSelections: TDictionary<TOSPlatform, TPlatformStyleSelectionProc>;
    class var FStyleResources: TDictionary<string, TFmxObject>;
    class function FindDefaultStyleResource(const OSPlatform: TOSPlatform): string; static;
    class function StyleResourceForContext(const Context: TFmxObject): string; static;
    class function StyleManagerNotification: TStyleManagerNotification;
  public
    class procedure RemoveStyleFromGlobalPool(const Style: TFmxObject); static;
    class procedure UpdateScenes; static;

    /// <summary>Enumarate all registered style resources.</summary>
    class procedure EnumStyleResources(Proc: TStyleResourceEnumProc);
    /// <summary>Return if exits in cache or load style from resource.</summary>
    class function GetStyleResource(const ResourceName: string): TFmxObject;

    /// <summary>Register style resource for specified platform.</summary>
    class procedure RegisterPlatformStyleResource(const APlatform: TOSPlatform; const ResourceName: string);
    /// <summary>Register selection procedure for specified platform.</summary>
    class procedure RegisterPlatformStyleSelection(const APlatform: TOSPlatform; const ASelection: TPlatformStyleSelectionProc);

    class function ActiveStyle(const Context: TFmxObject): TFmxObject; static;
    /// <summary>Returns active style for <c>IScene</c>.</summary>
    class function ActiveStyleForScene(const AScene: IInterface): TFmxObject; static;

    class procedure SetStyle(const Style: TFmxObject); overload;
    class procedure SetStyle(const Context: TFmxObject; const Style: TFmxObject); overload;
    class function SetStyleFromFile(const FileName: string): Boolean; overload;
    class function SetStyleFromFile(const Context: TFmxObject; const FileName: string): Boolean; overload;
    /// <summary>Loads from resource and sets the style specified by name as the active style, without raising an exception.</summary>
    class function TrySetStyleFromResource(const ResourceName: string): Boolean;

    class procedure UnInitialize;

    { Style description }

    /// <summary>Searches <c>TStyleDescription</c> object among all the heirs.</summary>
    class function FindStyleDescriptor(const AObject: TFmxObject): TStyleDescription;
    //  <summary>Searches <c>TStyleDescription</c> in a current style of specified control <c>AObject</c>.</summary>
    class function GetStyleDescriptionForControl(const AObject: TFmxObject): TStyleDescription;
  end;

//== INTERFACE END: FMX.Styles
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.VirtualKeyboard (from FMX.VirtualKeyboard.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  IFMXVirtualKeyboardService = interface(IInterface)
    ['{BB6F6668-C582-42E4-A766-863C1B9139D2}']
    function ShowVirtualKeyboard(const AControl: TFmxObject): Boolean;
    function HideVirtualKeyboard: Boolean;
    procedure SetTransientState(Value: Boolean);
    ///	<summary>
    ///	  Returns the current state of the virtual keyboard (onscreen keyboard).
    ///	</summary>
    function GetVirtualKeyboardState: TVirtualKeyboardStates;
    property VirtualKeyboardState: TVirtualKeyboardStates read GetVirtualKeyboardState;
  end;

  TVirtualKeyboardToolButton = class;

{ Additional toolbar above virtual keyboard in iOS }
  IFMXVirtualKeyboardToolbarService = interface(IInterface)
    ['{CE7795C2-4399-4094-BF58-2E69CEA71D57}']
    procedure SetToolbarEnabled(const Value: Boolean);
    function IsToolbarEnabled: Boolean;
    procedure SetHideKeyboardButtonVisibility(const Value: Boolean);
    function IsHideKeyboardButtonVisible: Boolean;
    //
    function AddButton(const Title: string; ExecuteEvent: TNotifyEvent): TVirtualKeyboardToolButton;
    procedure DeleteButton(const Index: Integer);
    function ButtonsCount: Integer;
    function GetButtonByIndex(const Index: Integer): TVirtualKeyboardToolButton;
    procedure ClearButtons;
  end;

  TVirtualKeyboardToolButton = class
  private
    FTitle: string;
    FOnExecute: TNotifyEvent;
    procedure SetTitle(const Value: string);
  protected
    procedure DoChanged; virtual; abstract;
  public
    procedure DoExecute;
    //
    property Title: string read FTitle write SetTitle;
    property OnExecute: TNotifyEvent read FOnExecute write FOnExecute;
  end;

//== INTERFACE END: FMX.VirtualKeyboard
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.InertialMovement (from FMX.InertialMovement.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


const
  DefaultStorageTime = 0.15;
  DefaultIntervalOfAni = 10;
  DecelerationRateNormal = 1.95;
  DecelerationRateFast = 9.5;
  DefaultElasticity = 100;
  DefaultMinVelocity = 10;
  DefaultMaxVelocity = 5000;
  DefaultDeadZone = 8;

type

{$REGION 'TPointD'}
  TPointD = record
    X: Double;
    Y: Double;
  public
    constructor Create(const P: TPointD); overload;
    constructor Create(const P: TPointF); overload;
    constructor Create(const P: TPoint); overload;
    constructor Create(const X, Y: Double); overload;
    procedure SetLocation(const P: TPointD);
    class operator Equal(const Lhs, Rhs: TPointD): Boolean;
    class operator NotEqual(const Lhs, Rhs: TPointD): Boolean; overload;
    class operator Add(const Lhs, Rhs: TPointD): TPointD;
    class operator Subtract(const Lhs, Rhs: TPointD): TPointD;
    class operator Implicit(const APointF: TPointF): TPointD;
    function Distance(const P2: TPointD): Double;
    function Abs: Double;
    procedure Offset(const DX, DY: Double);
  end;

{$ENDREGION}

{$REGION 'TRectD'}

  TRectD = record
    Left, Top, Right, Bottom: Double;
  private
    function GetHeight: Double;
    function GetWidth: Double;
    procedure SetHeight(const Value: Double);
    procedure SetWidth(const Value: Double);
    function GetTopLeft: TPointD;
    procedure SetTopLeft(const P: TPointD);
    function GetBottomRight: TPointD;
    procedure SetBottomRight(const P: TPointD);
  public
    constructor Create(const Origin: TPointD); overload;
    // empty rect at given origin
    constructor Create(const Left, Top, Right, Bottom: Double); overload;
    // at x, y with width and height
    // operator overloads
    class operator Equal(const Lhs, Rhs: TRectD): Boolean;
    class operator NotEqual(const Lhs, Rhs: TRectD): Boolean;
    class function Empty: TRectD; inline; static;
    // changing the width is always relative to Left;
    property Width: Double read GetWidth write SetWidth;
    // changing the Height is always relative to Top
    property Height: Double read GetHeight write SetHeight;
    procedure Inflate(const DX, DY: Double);
    procedure Offset(const DX, DY: Double);
    property TopLeft: TPointD read GetTopLeft write SetTopLeft;
    property BottomRight: TPointD read GetBottomRight write SetBottomRight;
  end;
{$ENDREGION}

{$REGION 'Types and methods for working with the smooth movement'}

  TAniCalculations = class(TPersistent)
  public type
    TTargetType = (Achieved, Max, Min, Other);
    TTarget = record
      TargetType: TTargetType;
      Point: TPointD;
    end;
  private type
    TPointTime = record
      Point: TPointD;
      Time: TDateTime;
    end;
  private
    FEnabled: Boolean;
    FInTimerProc: Boolean;
    FTouchTracking: TTouchTracking;
    FTimerHandle: TFmxHandle;
    FInterval: Word;
    FCurrentVelocity: TPointD;
    FUpVelocity: TPointD;
    FUpPosition: TPointD;
    FUpDownTime: TDateTime;
    FLastTimeCalc: TDateTime;
    [Weak] FOwner: TPersistent;
    FPlatformTimer: IFMXTimerService;
    FPointTime: TList<TPointTime>;

    FTargets: array of TTarget;
    FMinTarget: TTarget;
    FMaxTarget: TTarget;
    FTarget: TTarget;
    FLastTarget: TTarget;
    FCancelTargetX: Boolean;
    FCancelTargetY: Boolean;

    FOnStart: TNotifyEvent;
    FOnTimer: TNotifyEvent;
    FOnStop: TNotifyEvent;
    FDown: Boolean;
    FAnimation: Boolean;
    FViewportPosition: TPointD;
    FLowChanged: Boolean;
    FLastTimeChanged: TDateTime;
    FDownPoint: TPointD;
    FDownPosition: TPointD;
    FUpdateTimerCount: Integer;
    FElasticity: Double;
    FDecelerationRate: Double;
    FStorageTime: Double;
    FInDoStart: Boolean;
    FInDoStop: Boolean;
    FMoved: Boolean;
    FStarted: Boolean;
    FBoundsAnimation: Boolean;
    FAutoShowing: Boolean;
    FOpacity: Single;
    FShown: Boolean;
    FMouseTarget: TTarget;
    FAveraging: Boolean;
    FMinVelocity: Integer;
    FMaxVelocity: Integer;
    FDeadZone: Integer;
    FUpdateCount: Integer;
    FElasticityFactor: TPoint;
    procedure StartTimer;
    procedure StopTimer;
    procedure TimerProc;
    procedure Clear(T: TDateTime = 0);
    procedure UpdateTimer;
    procedure SetInterval(const Value: Word);
    procedure SetEnabled(const Value: Boolean);
    procedure SetTouchTracking(const Value: TTouchTracking);
    procedure InternalCalc(DeltaTime: Double);
    procedure SetAnimation(const Value: Boolean);
    procedure SetDown(const Value: Boolean);
    function FindTarget(var Target: TTarget): Boolean;
    function GetTargetCount: Integer;
    function DecelerationRateStored: Boolean;
    function ElasticityStored: Boolean;
    function StorageTimeStored: Boolean;
    procedure CalcVelocity(const Time: TDateTime = 0);
    procedure InternalStart;
    procedure InternalTerminated;
    procedure SetBoundsAnimation(const Value: Boolean);
    procedure UpdateViewportPositionByBounds;
    procedure SetAutoShowing(const Value: Boolean);
    procedure SetShown(const Value: Boolean);
    function GetViewportPositionF: TPointF;
    procedure SetViewportPositionF(const Value: TPointF);
    procedure SetMouseTarget(Value: TTarget);
    function GetInternalTouchTracking: TTouchTracking;
    function GetPositions(const Index: Integer): TPointD;
    function GetPositionCount: Integer;
    function GetPositionTimes(const Index: Integer): TDateTime;
    function PosToView(const APosition: TPointD): TPointD;
    procedure SetViewportPosition(const Value: TPointD);
    function GetOpacity: Single;
    function GetLowVelocity: Boolean;
    function AddPointTime(const X, Y: Double;
                          const Time: TDateTime = 0): TPointTime;
    procedure InternalChanged;
    procedure UpdateTarget;
    function DoStopScrolling(CurrentTime: TDateTime = 0): Boolean;
  protected
    function IsSmall(const P: TPointD;
                     const Epsilon: Double): Boolean; overload;
    function IsSmall(const P: TPointD): Boolean; overload;
    function GetOwner: TPersistent; override;
    procedure DoStart; virtual;
    procedure DoChanged; virtual;
    procedure DoStop; virtual;
    procedure DoCalc(const DeltaTime: Double;
                       var NewPoint, NewVelocity: TPointD;
                       var Done: Boolean); virtual;
    property Enabled: Boolean read FEnabled write SetEnabled;
    property Shown: Boolean read FShown write SetShown;
    property MouseTarget: TTarget read FMouseTarget write SetMouseTarget;
    property InternalTouchTracking: TTouchTracking read GetInternalTouchTracking;
    property Positions[const index: Integer]: TPointD read GetPositions;
    property PositionTimes[const index: Integer]: TDateTime read GetPositionTimes;
    property PositionCount: Integer read GetPositionCount;
    property UpVelocity: TPointD read FUpVelocity;
    property UpPosition: TPointD read FUpPosition;
    property UpDownTime: TDateTime read FUpDownTime;
    property MinTarget: TTarget read FMinTarget;
    property MaxTarget: TTarget read FMaxTarget;
    property Target: TTarget read FTarget;
    property MinVelocity: Integer read FMinVelocity write FMinVelocity default DefaultMinVelocity;
    property MaxVelocity: Integer read FMaxVelocity write FMaxVelocity default DefaultMaxVelocity;
    property DeadZone: Integer read FDeadZone write FDeadZone default DefaultDeadZone;
    property CancelTargetX: Boolean read FCancelTargetX;
    property CancelTargetY: Boolean read FCancelTargetY;
  public
    constructor Create(AOwner: TPersistent); virtual;
    destructor Destroy; override;
    procedure AfterConstruction; override;
    procedure Assign(Source: TPersistent); override;

    procedure MouseDown(X, Y: Double);
    procedure MouseMove(X, Y: Double);
    procedure MouseLeave;
    procedure MouseUp(X, Y: Double);
    procedure MouseWheel(X, Y: Double);

    property Animation: Boolean read FAnimation
                               write SetAnimation default False;

    property AutoShowing: Boolean read FAutoShowing
                                 write SetAutoShowing default False;

    property Averaging: Boolean read FAveraging
                               write FAveraging default False;

    property BoundsAnimation: Boolean read FBoundsAnimation
                                     write SetBoundsAnimation default True;

    property Interval: Word read FInterval
                           write SetInterval default DefaultIntervalOfAni;

    property TouchTracking: TTouchTracking read FTouchTracking
                                          write SetTouchTracking
                                        default [ttVertical, ttHorizontal];
    property TargetCount: Integer read GetTargetCount;
    procedure SetTargets(const ATargets: array of TTarget);
    procedure GetTargets(var ATargets: array of TTarget);
    procedure UpdatePosImmediately(const Force: Boolean = False);

    property DecelerationRate: Double read FDecelerationRate
                                     write FDecelerationRate
                                    stored DecelerationRateStored nodefault;
    property Elasticity: Double read FElasticity
                               write FElasticity
                              stored ElasticityStored nodefault;
    property StorageTime: Double read FStorageTime
                                write FStorageTime
                               stored StorageTimeStored nodefault;
    property CurrentVelocity: TPointD read FCurrentVelocity;
    property ViewportPosition: TPointD read FViewportPosition
                                      write SetViewportPosition;
    property ViewportPositionF: TPointF read GetViewportPositionF
                                       write SetViewportPositionF;
    property LastTimeCalc: TDateTime read FLastTimeCalc;
    property Down: Boolean read FDown write SetDown;
    property Opacity: Single read GetOpacity;
    property InTimerProc: Boolean read FInTimerProc;
    property Moved: Boolean read FMoved;
    property LowVelocity: Boolean read GetLowVelocity;
    procedure BeginUpdate;
    procedure EndUpdate;
    property UpdateCount: Integer read FUpdateCount;

    property OnStart: TNotifyEvent read FOnStart write FOnStart;
    property OnChanged: TNotifyEvent read FOnTimer write FOnTimer;
    property OnStop: TNotifyEvent read FOnStop write FOnStop;
  end;
{$ENDREGION}

//== INTERFACE END: FMX.InertialMovement
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Utils (from FMX.Utils.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  PAlphaColorArray = ^TAlphaColorArray;
  TAlphaColorArray = array [0 .. MaxInt div 4 - 1] of TAlphaColor;

  PAlphaColorRecArray = ^TAlphaColorRecArray;
  TAlphaColorRecArray = array [0 .. MaxInt div 4 - 1] of TAlphaColorRec;

  /// <summary>
  ///  A helper class that contains utilities to facilitate writing non-reentrant sections of code. It does not
  ///  provide thread-safety. A non-reentrable task is passed as a procedure or a function and can return a value.
  ///  Guard flag variable Guard is passed by reference and should be False in order for the procedure to execute.
  ///
  ///  For the cases when a non-reentrant section cannot be contained in one procedure, EnterSection/LeaveSection
  ///  can be used.
  /// </summary>
  TNonReentrantHelper = class
  public
    /// <summary>Execute non-reentrable procedure Proc using guard variable Guard. Return True if procedure was
    /// executed</summary>
    class function Execute(var Guard: Boolean; const Proc: TProc): Boolean; overload;
    /// <summary>Execute non-reentrable procedure Proc&lt;A&gt; with an argument of type A. Return True if procedure
    /// was executed </summary>
    class function Execute<A>(var Guard: Boolean; const Proc: TProc<A>; const Arg: A): Boolean; overload;
    /// <summary>Execute non-reentrable function Func:R. Return function result of type R or provided Default
    /// value of type R if the code was not executed</summary>
    class function Execute<R>(var Guard: Boolean; const Func: TFunc<R>; const Default: R): R; overload;
    /// <summary>Execute non-reentrable function Func with an argument of type A and return type R. Return function
    /// result or provided default value of type R if the code was not executed</summary>
    class function Execute<A; R>(var Guard: Boolean; const Func: TFunc<A, R>; const Arg: A; const Default: R): R; overload;
    /// <summary>Enter non-reentrable section of code. If the value of Guard was False, it will be changed to True
    /// and the result will be True. Otherwise the value is not going to be changed and the result will be False.
    /// </summary>
    class function EnterSection(var Guard: Boolean): Boolean; inline;
    /// <summary>Leave non-reentrable section of code. This should only be called once after EnterSection with same
    /// Guard variable returned True</summary>
    class procedure LeaveSection(var Guard: Boolean); inline;
  end;

  TFMXObjectHelper = class
  public type
    TFilterFunc = TFunc<TFMXObject, Boolean>;
    ESearchException = class(Exception);
  public
    /// <summary>Finds first parent, which conforms <c>AFilter</c>. If parent is found, returns true and parent in <c>AResult</c>,
    /// otherwise returns false and nil in <c>AResult</c></summary>
    class function FindParent(const AObject: TFMXObject; const AFilter: TFilterFunc; var AResult: TFMXObject): Boolean;
    /// <summary>Returns first parent, which conforms <c>AFilter</c>. If parent is found, returns parent,
    /// otherwise raises exception <c>ESearchException</c></summary>
    class function GetParent(const AObject: TFMXObject; const AFilter: TFilterFunc): TFMXObject;
    /// <summary>Finds nearest parent of <c>T</c> class. If parent is found, returns true and parent in <c>AResult</c>,
    /// otherwise returns false and nil in <c>AResult</c></summary>
    class function FindNearestParentOfClass<T: class>(const AObject: TFMXObject; var AResult: T): Boolean;
    /// <summary>Returns first parent of <c>T</c> class. If parent is found, returns parent,
    /// otherwise raises exception <c>ESearchException</c></summary>
    class function GetNearestParentOfClass<T: class>(const AObject: TFMXObject): T;
  end;

/// <summary>
/// Calculate relative luminance of given TAlphaColor.
/// See: http://en.wikipedia.org/wiki/Luminance_(relative)
/// Return value in range [0..1]
/// 1 - Light
/// 0 - Dark
/// </summary>
function Luminance(const AColor: TAlphaColor): Single;
/// <summary>
///  Fill array of TAlphaColor Dest of size Count with TAlphaColor value Value.
/// </summary>
procedure FillAlphaColor(const Dest: PAlphaColorArray; const Count: Integer; const Value: TAlphaColor);
/// <summary>
/// Fill a TAlphaColor rectangle in bit plane Dest of Width x Height with TAlphaColor value Value.
/// Rectangle is specified by (X1,Y1)-(X2,Y2), right-bottom bounds not included.
/// </summary>
procedure FillAlphaColorRect(const Dest: PAlphaColorArray; Width, Height, X1, Y1, X2, Y2: Integer;
  const Value: TAlphaColor);
/// <summary>
/// Fill Alpha in pixel array Dest of size Count. Other color components are intact.
/// </summary>
procedure FillAlpha(const Dest: PAlphaColorRecArray; const Count: Integer; const Alpha: Byte);
/// <summary>
/// Reverse order of bytes in place in array Dest of size Count.
/// </summary>
procedure ReverseBytes(const Dest: Pointer; const Count: Integer); deprecated;
/// <summary>
/// Return a string representation of R: TRectF.
/// </summary>
function RectToString(const R: TRectF): string;
/// <summary>
/// Return TRectF represented by string S.
/// </summary>
function StringToRect(S: string): TRectF;
/// <summary> Trying to bring a text string containing the number to the canonical form </summary>
function FixNumberText(const AText: string): string;
/// <summary>
/// Return a string representation of P: TPointF.
/// </summary>
function PointToString(const P: TPointF): string;
/// <summary>
/// Return TPointF represented by string S.
/// </summary>
function StringToPoint(S: string): TPointF;
/// <summary>
/// Return a Single value between Start and Stop at time moment T. When T = 0, Result = Start. When T = 1, Result = Stop.
/// </summary>
function InterpolateSingle(const Start, Stop, T: Single): Single;
/// <summary>
/// Used for rotation angles. Same as InterpolateSingle.
/// </summary>
function InterpolateRotation(const Start, Stop, T: Single): Single;
/// <summary>
/// Interpolate color value between colors Start and Stop at time moment T.
/// When T = 0, Result = Start. When T = 1, Result = Stop.
/// </summary>
function InterpolateColor(const Start, Stop: TAlphaColor; T: Single): TAlphaColor;
/// <summary>
/// Get a token from string S. Tokens are separated by one of the characters in Separators. Separators may be different
/// every time GetToken is called.
/// S is modified for subsequent calls to GetToken.
/// </summary>
function GetToken(var S: string; const Separators: string; const Stop: string = string.Empty): string; overload;
/// <summary>
/// Get a token from immutable string S, starting at position Pos. Pos is updated for subsequent calls to GetToken.
/// Tokens are separated by one of the characters in Separators. Separators may be different every time GetToken is
/// called.
/// </summary>
function GetToken(var Pos: Integer; const S: string; const Separators: string;
  const Stop: string = string.Empty): string; overload;
/// <summary>
/// Return a string representation of P: TPoint3D.
/// </summary>
function Point3DToString(const P: TPoint3D): string;
/// <summary>
///  Return TPoint3D represented by string S.
/// </summary>
function StringToPoint3D(S: string): TPoint3D;
/// <summary>
/// Returns the short version of the hint specified in the Hint string
/// </summary>
function GetShortHint(const Hint: string): string;
/// <summary>
/// Returns the long version of the hint specified in the Hint string
/// </summary>
function GetLongHint(const Hint: string): string;
/// <summary>
/// Make a normalized TVector3D equivalent to given TAlphaColor.
/// </summary>
function ColorToVector3D(const AColor: TAlphaColor): TVector3D; deprecated 'Use TAlphaColorF instead.';
/// <summary>
///  Make a TAlphaColor from TVector3D. The vector should be normalized.
/// </summary>
function Vector3DToColor(const AColor: TVector3D): TAlphaColor; deprecated 'Use TAlphaColorF instead.';
///<summary> verifies that AValue is an instance of AClass or its heir.
///<para> If this is not true, then it raise the exception.</para>
///<para> If AValue=nil and CanBeNil=true nothing happens, otherwise it raises the exception</para> </summary>
///<exception>EArgumentException is raised if AValue does not satisfy the conditions</exception>
///<exception>EArgumentNilException is raised if AValue or AClass is nil</exception>
procedure ValidateInheritance(const AValue: TPersistent; const AClass: TClass; const CanBeNil: Boolean = True);

///<summary> This function returns true if the given point (APoint) is inside or is on the contour of a
///circle centered at ACenter with radius ARadius.</summary>
function IsPointInCircle(const APoint, ACenter: TPointF; const ARadius: Integer): Boolean;

///<summary> Takes into account margin of error returning a percentage of match.
/// 100% match will be margin of error of deviation from the source point.
/// 0% will be at deviation away and beyond.</summary>
function CheckPoint(const APoint, ASource: TPointF; const ADeviation, ErrorMargin: Integer): Double;

// 2D shapes
type
  ///<summary> This structure represents a 2D circle centered in Center with a Radius.</summary>
  TCircle2D = record
    ///<summary> Center of the circle.</summary>
    Center: TPointF;
    ///<summary> Radius of the circle.</summary>
    Radius: Single;
    ///<summary> Default constructor.</summary>
    constructor Create(const ACenter: TPointF; const ARadius: Single);
  end;

  ///<summary> This structure represents a 2D line passing through one Origin and with a Direction.</summary>
  TLine2D = record
    ///<summary> Origin of the line.</summary>
    Origin: TPointF;
    ///<summary> Direction of the line.</summary>
    Direction: TPointF;
    ///<summary> Default constructor.</summary>
    constructor Create(const AnOrigin, ADestination: TPointF);
    ///<summary> Returns true if the line intersects with the circle, False otherwise.</summary>
    function Intersects(const ACircle: TCircle2D): Boolean;
  end;

var
  ///<summary>
  /// used for correct string to float convertion
  ///</summary>
  USFormatSettings: TFormatSettings;

//== INTERFACE END: FMX.Utils
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Surfaces (from FMX.Surfaces.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  TBitmapSurface = class(TPersistent)
  private
    FBits: Pointer;
    FPitch: Integer;
    FWidth: Integer;
    FHeight: Integer;
    FPixelFormat: TPixelFormat;
    FBytesPerPixel: Integer;

    function GetScanline(const Index: Integer): Pointer;
    function GetPixel(const X, Y: Integer): TAlphaColor;
    procedure SetPixel(const X, Y: Integer; const Value: TAlphaColor);

    class procedure SwapColors(var Color1, Color2: TAlphaColor); overload; static; inline;
    procedure SwapColors(const X1, Y1, X2, Y2: Integer); overload; inline;
    function GetRect: TRect;
  protected
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create;
    destructor Destroy; override;

    function GetPixelAddr(const X, Y: Integer): Pointer;
    procedure Clear(const Color: TAlphaColor);
    procedure SetSize(const AWidth, AHeight: Integer; const APixelFormat: TPixelFormat = TPixelFormat.None);
    procedure StretchFrom(const Source: TBitmapSurface; const NewWidth, NewHeight: Integer;
      APixelFormat: TPixelFormat = TPixelFormat.None);
    procedure Mirror;
    procedure Flip;
    /// <summary>Rotates bitmap on 90 degress by clockwise</summary>
    procedure Rotate90;
    /// <summary>Rotates bitmap on 180 degress by clockwise</summary>
    procedure Rotate180;
    /// <summary>Rotates bitmap on 270 degress by clockwise</summary>
    procedure Rotate270;

    property Bits: Pointer read FBits;
    property Pitch: Integer read FPitch;
    property Width: Integer read FWidth;
    property Height: Integer read FHeight;
    property Rect: TRect read GetRect;
    property PixelFormat: TPixelFormat read FPixelFormat;
    property BytesPerPixel: Integer read FBytesPerPixel;
    property Scanline[const Index: Integer]: Pointer read GetScanline;
    property Pixels[const X, Y: Integer]: TAlphaColor read GetPixel write SetPixel;
  end;

  TMipmapSurface = class(TBitmapSurface)
  private type
    TMipmapSurfaces = TObjectList<TMipmapSurface>;
  private
    FChildMipmaps: TMipmapSurfaces;

    function GetMipCount: Integer;
    function GetMip(const MipIndex: Integer): TMipmapSurface;
  protected
    procedure StretchHalfFrom(const Source: TMipmapSurface);
  public
    constructor Create;
    destructor Destroy; override;

    procedure GenerateMips;
    procedure ClearMips;

    property MipCount: Integer read GetMipCount;
    property Mip[const MipIndex: Integer]: TMipmapSurface read GetMip;
  end;

//== INTERFACE END: FMX.Surfaces
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Graphics (from FMX.Graphics.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  TCanvas = class;
  TCanvasClass = class of TCanvas;
  TBitmap = class;
  TBitmapImage = class;
  TTextSettings = class;

{ TGradientPoint }

  TGradientPoint = class(TCollectionItem)
  private
    FColor: TAlphaColor;
    FOffset: Single;
    procedure SetColor(const Value: TAlphaColor);
    procedure SetOffset(const Value: Single);
  public
    procedure Assign(Source: TPersistent); override;
    property IntColor: TAlphaColor read FColor write FColor;
  published
    property Color: TAlphaColor read FColor write SetColor;
    property Offset: Single read FOffset write SetOffset nodefault;
  end;

{ TGradientPoints }

  TGradientPoints = class(TCollection)
  private
    function GetPoint(Index: Integer): TGradientPoint;
  protected
    procedure Update(Item: TCollectionItem); override;
  public
    property Points[Index: Integer]: TGradientPoint read GetPoint; default;
  end;

{ TGradient }

  TGradientStyle = (Linear, Radial);

  TGradient = class(TPersistent)
  private
    FPoints: TGradientPoints;
    FOnChanged: TNotifyEvent;
    FStartPosition: TPosition;
    FStopPosition: TPosition;
    FStyle: TGradientStyle;
    FRadialTransform: TTransform;
    procedure SetStartPosition(const Value: TPosition);
    procedure SetStopPosition(const Value: TPosition);
    procedure PositionChanged(Sender: TObject);
    procedure SetColor(const Value: TAlphaColor);
    procedure SetColor1(const Value: TAlphaColor);
    function IsLinearStored: Boolean;
    procedure SetStyle(const Value: TGradientStyle);
    function IsRadialStored: Boolean;
    procedure SetRadialTransform(const Value: TTransform);
    procedure SetPoints(const Value: TGradientPoints);
  public
    constructor Create;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    procedure Change;
    procedure ApplyOpacity(const AOpacity: Single);
    function InterpolateColor(Offset: Single): TAlphaColor; overload;
    function InterpolateColor(X, Y: Single): TAlphaColor; overload;
    function Equal(const AGradient: TGradient): Boolean;
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
    { fast access }
    property Color: TAlphaColor write SetColor;
    property Color1: TAlphaColor write SetColor1;
  published
    property Points: TGradientPoints read FPoints write SetPoints;
    property Style: TGradientStyle read FStyle write SetStyle default TGradientStyle.Linear;
    { linear }
    property StartPosition: TPosition read FStartPosition write SetStartPosition stored IsLinearStored;
    property StopPosition: TPosition read FStopPosition write SetStopPosition stored IsLinearStored;
    { radial }
    property RadialTransform: TTransform read FRadialTransform write SetRadialTransform stored IsRadialStored;
  end;

{ TBrushResource }

  TBrush = class;
  TBrushObject = class;

  TBrushResource = class(TInterfacedPersistent, IFreeNotification)
  private
    FStyleResource: TBrushObject;
    FStyleLookup: string;
    FOnChanged: TNotifyEvent;
    function GetBrush: TBrush;
    procedure SetStyleResource(const Value: TBrushObject);
    function GetStyleLookup: string;
    procedure SetStyleLookup(const Value: string);
    { IFreeNotification }
    procedure FreeNotification(AObject: TObject);
  public
    destructor Destroy; override;
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
    procedure Assign(Source: TPersistent); override;
    property Brush: TBrush read GetBrush;
  published
    property StyleResource: TBrushObject read FStyleResource write SetStyleResource stored False;
    property StyleLookup: string read GetStyleLookup write SetStyleLookup;
  end;

{ TBrushBitmap }

  TWrapMode = (Tile, TileOriginal, TileStretch);

  TBrushBitmap = class(TInterfacedPersistent)
  private
    FOnChanged: TNotifyEvent;
    FBitmap: TBitmap;
    FWrapMode: TWrapMode;
    procedure SetWrapMode(const Value: TWrapMode);
    procedure SetBitmap(const Value: TBitmap);
    function GetBitmapImage: TBitmapImage;
  protected
    procedure DoChanged; virtual;
  public
    constructor Create;
    destructor Destroy; override;
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
    procedure Assign(Source: TPersistent); override;
  published
    property Bitmap: TBitmap read FBitmap write SetBitmap;
    /// <summary>Image to be used by the brush.</summary>
    property Image: TBitmapImage read GetBitmapImage;
    property WrapMode: TWrapMode read FWrapMode write SetWrapMode;
  end;

{ TBrush }

  TBrushKind = (None, Solid, Gradient, Bitmap, Resource);

  TBrush = class(TPersistent)
  private
    FColor: TAlphaColor;
    FKind: TBrushKind;
    FOnChanged: TNotifyEvent;
    FGradient: TGradient;
    FDefaultKind: TBrushKind;
    FDefaultColor: TAlphaColor;
    FResource: TBrushResource;
    FBitmap: TBrushBitmap;
    FOnGradientChanged: TNotifyEvent;
    procedure SetColor(const Value: TAlphaColor);
    procedure SetKind(const Value: TBrushKind);
    procedure SetGradient(const Value: TGradient);
    function IsColorStored: Boolean;
    function IsGradientStored: Boolean;
    function GetColor: TAlphaColor;
    function IsKindStored: Boolean;
    procedure SetResource(const Value: TBrushResource);
    function IsResourceStored: Boolean;
    function IsBitmapStored: Boolean;
  protected
    procedure GradientChanged(Sender: TObject);
    procedure ResourceChanged(Sender: TObject);
    procedure BitmapChanged(Sender: TObject);
  public
    constructor Create(const ADefaultKind: TBrushKind; const ADefaultColor: TAlphaColor);
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
    property OnGradientChanged: TNotifyEvent read FOnGradientChanged write FOnGradientChanged;
    property DefaultColor: TAlphaColor read FDefaultColor write FDefaultColor;
    property DefaultKind: TBrushKind read FDefaultKind write FDefaultKind;
  published
    property Color: TAlphaColor read GetColor write SetColor stored IsColorStored;
    property Bitmap: TBrushBitmap read FBitmap write FBitmap stored IsBitmapStored;
    property Kind: TBrushKind read FKind write SetKind stored IsKindStored;
    property Gradient: TGradient read FGradient write SetGradient stored IsGradientStored;
    property Resource: TBrushResource read FResource write SetResource stored IsResourceStored;
  end;

  TStrokeCap = (Flat, Round);

  TStrokeJoin = (Miter, Round, Bevel);

  TStrokeDash = (Solid, Dash, Dot, DashDot, DashDotDot, Custom);

  TDashArray = TArray<Single>;

  TStrokeBrush = class(TBrush)
  public type
    TDashData = record
      DashArray: TDashArray;
      DashOffset: Single;
      constructor Create(const ADashArray: TDashArray; ADashOffset: Single);
    end;

    TDashDevice = (Screen, Printer);
    TStdDashes = array [TDashDevice, TStrokeDash] of TDashData;
  private class var
    FStdDash: TStdDashes;
    FStdDashCreated: Boolean;
  private
    FJoin: TStrokeJoin;
    FThickness: Single;
    FCap: TStrokeCap;
    FDash: TStrokeDash;
    FDashArray: TDashArray;
    FDashOffset: Single;
    function IsThicknessStored: Boolean;
    procedure SetCap(const Value: TStrokeCap);
    procedure SetDash(const Value: TStrokeDash);
    procedure SetJoin(const Value: TStrokeJoin);
    procedure SetThickness(const Value: Single);
    function GetDashArray: TDashArray;
    class function GetStdDash(const Device: TDashDevice; const Dash: TStrokeDash): TDashData; static;
    procedure ReadCustomDash(AStream: TStream);
    procedure WriteCustomDash(AStream: TStream);
  protected
    procedure DefineProperties(Filer: TFiler); override;
  public
    constructor Create(const ADefaultKind: TBrushKind; const ADefaultColor: TAlphaColor); reintroduce;
    procedure Assign(Source: TPersistent); override;
    procedure SetCustomDash(const Dash: array of Single; Offset: Single);
    property DashArray: TDashArray read GetDashArray;
    property DashOffset: Single read FDashOffset;
    class property StdDash[const Device: TDashDevice; const Dash: TStrokeDash]: TDashData read GetStdDash;
  published
    property Thickness: Single read FThickness write SetThickness stored IsThicknessStored nodefault;
    property Cap: TStrokeCap read FCap write SetCap default TStrokeCap.Flat;
    property Dash: TStrokeDash read FDash write SetDash default TStrokeDash.Solid;
    property Join: TStrokeJoin read FJoin write SetJoin default TStrokeJoin.Miter;
  end;

  IFMXSystemFontService = interface(IInterface)
    ['{62017F22-ADF1-44D9-A21D-796D8C7F3CF0}']
    function GetDefaultFontFamilyName: string;
    function GetDefaultFontSize: Single;
  end;

{ TFont }

  TFontClass = class of TFont;

  TFontWeight = (Thin, UltraLight, Light, SemiLight, Regular, Medium, Semibold, Bold, UltraBold, Black, UltraBlack);

  /// <summary>
  /// Font weight type helper
  /// </summary>
  TFontWeightHelper = record helper for TFontWeight
    /// <summary>
    /// Checks wherever current weight value is TFontWeight.Regular
    /// </summary>
    function IsRegular: Boolean;
  end;

  TFontSlant = (Regular, Italic, Oblique);

  /// <summary>
  /// Font slant type helper
  /// </summary>
  TFontSlantHelper = record helper for TFontSlant
    /// <summary>
    /// Checks wherever current slant value is TFontSlant.Regular
    /// </summary>
    function IsRegular: Boolean;
  end;

  TFontStretch = (UltraCondensed, ExtraCondensed, Condensed, SemiCondensed, Regular, SemiExpanded, Expanded,
    ExtraExpanded, UltraExpanded);

  /// <summary>
  /// Font stretch type helper
  /// </summary>
  TFontStretchHelper = record helper for TFontStretch
    /// <summary>
    /// Checks wherever current stretch value is TFontStretch.Regular
    /// </summary>
    function IsRegular: Boolean;
  end;

  /// <summary>
  /// Extended font style based on TFontStyles. Support multi-weight and multi-stretch fonts
  /// </summary>
  TFontStyleExt = record
    /// <summary>
    /// Set of regular <c>TFontStyle</c>. May contains any <c>TFontStyle</c> value but TFont will process only
    /// fsOutline and fsStrikeOut values
    /// </summary>
    SimpleStyle: TFontStyles;
    /// <summary>
    /// Default font weight value
    /// </summary>
    Weight: TFontWeight;
    /// <summary>
    /// Default font slant value
    /// </summary>
    Slant: TFontSlant;
    /// <summary>
    /// Default font stretch value
    /// </summary>
    Stretch: TFontStretch;

    /// <summary>
    /// Common extended font style constructor.
    /// Initialy new style is initializing using <c>AOtherStyles</c> values. After that <c>AWeight</c>, <c>ASlant</c>
    /// and <c>AStretch</c> values are applying
    /// </summary>
    /// <remarks>
    /// Basicaly bsBold or fsItalic values in AOtherStyles are ignoring. Because after creating result from the set of
    /// <c>TFontStyle</c> values system will set styles from <c>AWeight</c>, <c>ASlant</c> and <c>AStretch</c> which
    /// will replace style values.
    /// </remarks>
    class function Create(const AWeight: TFontWeight = TFontWeight.Regular;
      const AStant: TFontSlant = TFontSlant.Regular; const AStretch: TFontStretch = TFontStretch.Regular;
      const AOtherStyles: TFontStyles = []): TFontStyleExt; overload; static; inline;
    /// <summary>Constructor that allows to create extended style from the regular <c>TFontStyles</c></summary>
    class function Create(const AStyle: TFontStyles): TFontStyleExt; overload; static; inline;
    /// <summary>Default style with regular parameters without any decorations</summary>
    class function Default: TFontStyleExt; static; inline;
    // Operators
    /// <summary>Overriding equality check operator</summary>
    class operator Equal(const A, B: TFontStyleExt): Boolean;
    /// <summary>Overriding inequality check operator</summary>
    class operator NotEqual(const A, B: TFontStyleExt): Boolean;
    /// <summary>Overriding implicit conversion to TFontStyles</summary>
    class operator Implicit(const AStyle: TFontStyleExt): TFontStyles;
    /// <summary>Overriding addition operator with both extended styles</summary>
    class operator Add(const A, B: TFontStyleExt): TFontStyleExt;
    /// <summary>Overriding addition operator with single font style item</summary>
    class operator Add(const A: TFontStyleExt; const B: TFontStyle): TFontStyleExt;
    /// <summary>Overriding addition operator with set of font styles</summary>
    class operator Add(const A: TFontStyleExt; const B: TFontStyles): TFontStyleExt;
    /// <summary>Overriding subtraction operator with single font style item</summary>
    class operator Subtract(const A: TFontStyleExt; const B: TFontStyle): TFontStyleExt;
    /// <summary>Overriding subtraction operator with set of font styles</summary>
    class operator Subtract(const A: TFontStyleExt; const B: TFontStyles): TFontStyleExt;
    /// <summary>Overriding check whether TFontStyle contains in TFontStyleExt</summary>
    class operator In(const A: TFontStyle; const B: TFontStyleExt): Boolean;
    /// <summary>Overriding Multiply set of TFontStyle to the TFontStyleExt</summary>
    class operator Multiply(const A: TFontStyles; const B: TFontStyleExt): TFontStyles;

    /// <summary>
    /// Overriding Multiply set of TFontStyle to the TFontStyleExt
    /// </summary>
    function IsRegular: Boolean;
  end;

  TFont = class(TPersistent)
  private const
    DefaultFontSize: Single = 12.0;
    DefaultFontFamily = 'Tahoma';
    MaxFontSize: Single = 512.0;
  public 
   class var FontService: IFMXSystemFontService;
  private
    FSize: Single;
    FFamily: TFontName;
    FStyleExt: TFontStyleExt;
    FUpdating: Boolean;
    FChanged: Boolean;
    FOnChanged: TNotifyEvent;
    procedure SetFamily(const Value: TFontName);
    procedure SetSize(const Value: Single);
    function GetStyle: TFontStyles;
    procedure SetStyle(const Value: TFontStyles);
    procedure SetStyleExt(const Value: TFontStyleExt);
    procedure ReadStyleExt(AStream: TStream);
    procedure WriteStyleExt(AStream: TStream);
  protected
    procedure DefineProperties(Filer: TFiler); override;
    function DefaultFamily: string; virtual;
    function DefaultSize: Single; virtual;
    procedure DoChanged; virtual;
  public
    constructor Create;
    procedure AfterConstruction; override;
    procedure Change;
    procedure Assign(Source: TPersistent); override;
    procedure SetSettings(const AFamily: string; const ASize: Single; const AStyle: TFontStyleExt);
    function Equals(Obj: TObject): Boolean; override;
    function IsFamilyStored: Boolean;
    function IsSizeStored: Boolean;
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
    /// <summary>
    /// Refrects current font style, including underline and strikeout
    /// </summary>
    property StyleExt: TFontStyleExt read FStyleExt write SetStyleExt;
  published
    property Family: TFontName read FFamily write SetFamily stored IsFamilyStored;
    property Size: Single read FSize write SetSize stored IsSizeStored nodefault;
    property Style: TFontStyles read GetStyle write SetStyle stored False;
  end;

{ TBitmapCodec }

  TBitmapCodecSaveParams = record
    // encode quality 0..100
    Quality: Integer;
  end;
  PBitmapCodecSaveParams = ^TBitmapCodecSaveParams;

  TCustomBitmapCodec = class abstract
  public
    class function GetImageSize(const AFileName: string): TPointF; virtual; abstract;
    class function IsValid(const AStream: TStream): Boolean; virtual; abstract;
    function LoadFromFile(const AFileName: string; const ABitmap: TBitmapSurface;
      const AMaxSizeLimit: Cardinal = 0): Boolean; virtual; abstract;
    function LoadThumbnailFromFile(const AFileName: string; const AFitWidth, AFitHeight: Single;
      const UseEmbedded: Boolean; const ABitmap: TBitmapSurface): Boolean; virtual; abstract;
    function LoadFromStream(const AStream: TStream; const ABitmap: TBitmapSurface;
      const AMaxSizeLimit: Cardinal = 0): Boolean; virtual; abstract;
    function SaveToFile(const AFileName: string; const ABitmap: TBitmapSurface; const ASaveParams: PBitmapCodecSaveParams = nil): Boolean; virtual; abstract;
    function SaveToStream(const AStream: TStream; const ABitmap: TBitmapSurface; const AExtension: string;
      const ASaveParams: PBitmapCodecSaveParams = nil): Boolean; virtual; abstract;
  end;
  TCustomBitmapCodecClass = class of TCustomBitmapCodec;

{ TBitmapCodecManager }

  EBitmapCodecManagerException = class(Exception);

  TBitmapCodecManager = class sealed
  private type
    TCodecDescriptor = record
      Extension: string;
      Description: string;
      CodecClass: TCustomBitmapCodecClass;
      CanSave: Boolean;
      function ToFilterString: string;
    end;
  strict private
    class var FCodecsDescriptors: TList<TCodecDescriptor>;
    class function SameExtension(const ALeft, ARight: string): Boolean;
    class function FindCodecClass(const AFileExtension: string; var ACodecClass: TCustomBitmapCodecClass): Boolean;
    class function FindWritableCodecClass(const AFileExtension: string; var ACodecClass: TCustomBitmapCodecClass): Boolean;
    class function GuessCodecClass(const AFileExtension: string): TCustomBitmapCodecClass;
    class function GetCodecsDescriptors: TList<TCodecDescriptor>; static;
    class property CodecsDescriptors: TList<TCodecDescriptor> read GetCodecsDescriptors;
  public
    // Reserved for internal use only - do not call directly!
    class procedure UnInitialize;

    { Registration and Unregistration }

    /// <summary>Register a bitmap codec class with a specified file extension and description.</summary>
    /// <remarks>If codec with specified <c>AFileExtension</c> was already registered or <c>AFileExtension</c> is empty
    /// or <c>ACodecClass</c> is nil will raise <c>EBitmapCodecManagerException</c>.</remarks>
    class procedure RegisterBitmapCodecClass(const AFileExtension, ADescription: string; const ACanSave: Boolean;
      const ACodecClass: TCustomBitmapCodecClass);
    /// <summary>Unregisters codec with specified file extension <c>AFileExtension</c>.</summary>
    class procedure UnregisterBitmapCodecClass(const AFileExtension: string);

    { Helpers }

    /// <summary>Returns list of supported image file extensions separated by ';'.</summary>
    class function GetFileTypes: string;
    /// <summary>Returns filter presentation of supported image types for TXXXDialog components.</summary>
    class function GetFilterString: string;
    /// <summary>Returns true, if codec with specified file extension was registered.</summary>
    class function CodecExists(const AFileName: string): Boolean; overload;
    /// <summary>Returns image size for specified file by <c>AFileName</c>.</summary>
    class function GetImageSize(const AFileName: string): TPointF;

    { Loading }

    /// <summary>Loads image from file by <c>AFileName</c> to Bitmap surface <c>ABitmap</c>. If image successfully
    /// loaded, it returns true, otherwise - false.</summary>
    /// <remarks>If <c>ABitmap</c> is nil, it will raise <c>EBitmapCodecManagerException</c>.</remarks>
    class function LoadFromFile(const AFileName: string; const ABitmap: TBitmapSurface;
      const AMaxSizeLimit: Cardinal = 0): Boolean;
    /// <summary>Loads image thumbnail with specified size <c>AFitWidth</c> and <c>AFitHeight</c> by file name
    /// <c>AFileName</c>. If image successfully loaded, it returns true, otherwise - false.</summary>
    /// <remarks>If <c>ABitmap</c> is nil, it will raise <c>EBitmapCodecManagerException</c>.</remarks>
    class function LoadThumbnailFromFile(const AFileName: string; const AFitWidth, AFitHeight: Single;
      const AUseEmbedded: Boolean; const ABitmap: TBitmapSurface): Boolean;
    /// <summary>Loads image from the stream <c>AStream</c>. If image successfully loaded, it returns true,
    /// otherwise - false.</summary>
    /// <remarks>If <c>ABitmap</c> or <c>AStream</c> is nil, it will raise <c>EBitmapCodecManagerException</c>.</remarks>
    class function LoadFromStream(const AStream: TStream; const ABitmap: TBitmapSurface;
      const AMaxSizeLimit: Cardinal = 0): Boolean;

    { Saving }

    /// <summary>Saves bitmap <c>ABitmap</c> to the stream <c>AStream</c> with using codec with specified extension
    /// <c>AExtension</c>. Optionally, you can specify save options. For example, the quality. If image successfully
    /// saved to the stream, it returns true, otherwise - false.</summary>
    /// <remarks>If <c>ABitmap</c> or <c>AStream</c> is nil, it will raise <c>EBitmapCodecManagerException</c>.</remarks>
    class function SaveToStream(const AStream: TStream; const ABitmap: TBitmapSurface; const AExtension: string;
      const ASaveParams: PBitmapCodecSaveParams = nil): Boolean; overload;
    /// <summary>Saves bitmap <c>ABitmap</c> to the file <c>AFileName</c> . It uses codec extracted by <c>FileName</c>
    /// extension. Optionally, you can specify save options. For example, the quality. If image successfully saved to
    /// the file, it returns true, otherwise - false.</summary>
    /// <remarks>If <c>ABitmap</c> is nil, it will raise <c>EBitmapCodecManagerException</c>.</remarks>
    class function SaveToFile(const AFileName: string; const ABitmap: TBitmapSurface;
      const ASaveParams: PBitmapCodecSaveParams = nil): Boolean;
  end;

{ TImageTypeChecker }

  /// <summary>Helper class for BitmapCodec.</summary>
  TImageTypeChecker = class
  private type
    TImageData = record
      DataType: string;
      Length: Integer;
      Header: array [0..3] of Byte;
    end;
  public
    /// <summary>Analyzes the header to guess the image format of he given file.</summary>
    class function GetType(const AFileName: string): string; overload;
    /// <summary>Analyzes the header to guess the image format of he given stream.</summary>
    class function GetType(const AData: TStream): string; overload;
  end;

{ TCustomAnimatedCodec }

  EAnimatedCodecException = class(Exception);

  TBitmapFrame = record
    Bitmap: TBitmap;
    Duration: Integer;
  end;

  TAnimatedCapability = (Encode, Decode);

  TAnimatedCapabilities = set of TAnimatedCapability;

  TCustomAnimatedCodec = class abstract
  private
    FExtension: string;
    FFrames: TList<TBitmapFrame>;
    procedure FramesNotify(Sender: TObject; const Item: TBitmapFrame; Action: TCollectionNotification);
    function GetBitmap(const AMilliseconds: Integer): TBitmap;
    function GetCount: Integer;
    function GetFrame(const AIndex: Integer): TBitmapFrame;
  protected
    constructor Create(const AExtension: string); virtual;
    function GetDuration: Integer; virtual;
    property Extension: string read FExtension;
  public
    destructor Destroy; override;
    /// <summary>Add frame.</summary>
    /// <param name="ABitmap">Frame's bitmap to be added.</param>
    /// <param name="ADuration">Frame duration in milliseconds.</param>
    /// <remarks>If the added frame does not have the same dimensions as the existing frames, an <c>EAnimatedCodecException</c> will be raised.</remarks>
    procedure AddFrame(const ABitmap: TBitmap; const ADuration: Integer);
    /// <summary>Load animation from a file.</summary>
    /// <param name="AFileName">Source file name.</param>
    /// <return>True if the file loads successfully, and false otherwise.</returns>
    function LoadFromFile(const AFileName: string): Boolean; virtual;
    /// <summary>Load animation from a stream.</summary>
    /// <param name="AStream">Source stream.</param>
    /// <return>True if the stream loads successfully, and false otherwise.</returns>
    function LoadFromStream(const AStream: TStream): Boolean; virtual; abstract;
    /// <summary>Renders a frame at a specified time in milliseconds on the Canvas.</summary>
    /// <param name="ACanvas">Destination canvas.</param>
    /// <param name="AMilliseconds">The time in milliseconds of the frame to be rendered.</param>
    /// <param name="AWidth">Source width.</param>
    /// <param name="AHeight">Source height.</param>
    /// <param name="ADestRect">Destination bounds.</param>
    /// <param name="AOpacity">Opacity level of the rendered output.</param>
    /// <remarks>This function is expected to render the frame successfully, regardless of the decoder (e.g. vector-based animations that do not return a list of frames).</remarks>
    /// <return>True if successfully rendered, false otherwise.</returns>
    function Render(const ACanvas: TCanvas; const AMilliseconds: Integer; const AWidth, AHeight: Integer; const ADestRect: TRectF; const AOpacity: Single = 1): Boolean; virtual;
    /// <summary>Reset the frame list.</summary>
    procedure Reset;
    /// <summary>Save animation to a file.</summary>
    /// <param name="AFileName">Destination file name.</param>
    /// <param name="AQuality">Percentage of quality (range: 0-100)</param>
    /// <remarks>The higher the selected quality, the lower the compression, resulting in a larger output size.</remarks>
    /// <return>True if the file is saved successfully, and false otherwise.</return>
    function SaveToFile(const AFileName: string; const AQuality: Integer = 80): Boolean; virtual;
    /// <summary>Save animation to a stream.</summary>
    /// <param name="AStream">Destination stream.</param>
    /// <param name="AQuality">Quality of the output animation, ranging from 0 (poor quality) to 100 (excellent quality).</param>
    /// <return>True if the stream is saved successfully, and false otherwise.</return>
    function SaveToStream(const AStream: TStream; const AQuality: Integer = 80): Boolean; virtual; abstract;
    /// <summary>Get bitmap at a time.</summary>
    property Bitmaps[const AMilliseconds: Integer]: TBitmap read GetBitmap; default;
    /// <summary>Total number of frames.</summary>
    /// <remarks>Some decoders (e.g. vector-based animations) may not return any frames.</remarks>
    property Count: Integer read GetCount;
    /// <summary>Total animation duration in milliseconds.</summary>
    property Duration: Integer read GetDuration;
    /// <summary>Get frame at an index.</summary>
    property Frames[const AIndex: Integer]: TBitmapFrame read GetFrame;
  end;
  TCustomAnimatedCodecClass = class of TCustomAnimatedCodec;

{ TAnimatedCodecManager }

  EAnimatedCodecManagerException = class(Exception);

  TAnimatedCodecManager = class sealed
  private type
    TCodecDescriptor = record
      Extension: string;
      Description: string;
      Capabilities: TAnimatedCapabilities;
      CodecClass: TCustomAnimatedCodecClass;
    end;
  strict private
    class var FCodecsDescriptors: TList<TCodecDescriptor>;
    class destructor Destroy;
    class function IndexOfExtension(const AExtension: string): Integer;
    class function NormalizeExtension(const AExtension: string): string; inline;
  public
    /// <summary>Creates an animated codec.</summary>
    /// <param name="AExtension">The file extension for which the codec will be used.</param>
    /// <return>Animated codec if the extension is supported, or nil otherwise.</return>
    class function CreateAnimatedCodec(const AExtension: string): TCustomAnimatedCodec;
    /// <summary>Returns the list of extensions (e.g. ".gif;.webp").</summary>
    /// <param name="ACapability">The required capability to return the list of extensions.</param>
    /// <return>List of extensions</return>
    class function GetFileTypes(const ACapability: TAnimatedCapability): string;
    /// <summary>Returns the filter string for use in dialog components (e.g. <c>TSaveDialog</c>, <c>TOpenDialog</c>).</summary>
    /// <param name="ACapability">The required capability to return the filter string.</param>
    /// <return>Filter string.</return>
    class function GetFilterString(const ACapability: TAnimatedCapability): string;
    /// <summary>Checks if a capability is supported.</summary>
    /// <param name="AExtension">Extension used for verification</param>
    /// <param name="ACapability">Capability to be checked.</param>
    /// <remarks>The wildcard "*" can be used to indicate all extensions.</remarks>
    /// <return>True if the capability is supported, and false otherwise.</return>
    class function HasCapability(const AExtension: string; const ACapability: TAnimatedCapability): Boolean;
    /// <summary>Register an animated codec class.</summary>
    /// <param name="AExtension">Extension to be registered.</param>
    /// <param name="ADescription">Description of the file whose extension will be registered.</param>
    /// <param name="ACapabilities">The capability of the codec class to be registered.</param>
    /// <param name="ACodecClass">Animated codec class to be registered.</param>
    /// <remarks>If the extension has already been registered, an <c>EAnimatedCodecManagerException</c> will be raised.</remarks>
    class procedure RegisterAnimatedCodecClass(const AExtension, ADescription: string; ACapabilities: TAnimatedCapabilities; ACodecClass: TCustomAnimatedCodecClass);
    /// <summary>Unregister an animated codec class.</summary>
    /// <param name="AExtension">Extension to be unregistered.</param>
    class procedure UnregisterAnimatedCodecClass(const AExtension: string);
  end;

{ TBitmap }

  IBitmapObject = interface(IFreeNotificationBehavior)
    ['{5C17D001-47C1-462F-856D-8358B7B2C842}']
    function GetBitmap: TBitmap;
    property Bitmap: TBitmap read GetBitmap;
  end;

  TBitmapData = record
  private
    FPixelFormat: TPixelFormat;
    FWidth: Integer;
    FHeight: Integer;
    function GetBytesPerPixel: Integer;
    function GetBytesPerLine: Integer;
  public
    Data: Pointer;
    Pitch: Integer;
    constructor Create(const AWidth, AHeight: Integer; const APixelFormat: TPixelFormat);
    function GetPixel(const X, Y: Integer): TAlphaColor;
    procedure SetPixel(const X, Y: Integer; const AColor: TAlphaColor);
    procedure Copy(const Source: TBitmapData);
    // Access to scanline in PixelFormat
    function GetScanline(const I: Integer): Pointer;
    function GetPixelAddr(const I, J: Integer): Pointer;
    property PixelFormat: TPixelFormat read FPixelFormat;
    property BytesPerPixel: Integer read GetBytesPerPixel;
    property BytesPerLine: Integer read GetBytesPerLine;
    property Width: Integer read FWidth;
    property Height: Integer read FHeight;
  end;

  TMapAccess = (Read, Write, ReadWrite);

  TBitmapImage = class
  private
    FRefCount: Integer;
    FHandle: THandle;
    FCanvasClass: TCanvasClass;
    FWidth: Integer;
    FHeight: Integer;
    FBitmapScale: Single;
    FPixelFormat: TPixelFormat;
    procedure CreateHandle;
    procedure FreeHandle;
    function GetCanvasClass: TCanvasClass;
  public
    constructor Create;
    procedure IncreaseRefCount; inline;
    procedure DecreaseRefCount;
    property RefCount: Integer read FRefCount;
    property CanvasClass: TCanvasClass read GetCanvasClass;
    property Handle: THandle read FHandle;
    property BitmapScale: Single read FBitmapScale;
    property PixelFormat: TPixelFormat read FPixelFormat;
    property Height: Integer read FHeight;
    property Width: Integer read FWidth;
  end;

  TCanvasQuality = (SystemDefault, HighPerformance, HighQuality);

  TBitmap = class(TInterfacedPersistent, IStreamPersist)
  private
    FImage: TBitmapImage;
    FCanvas: TCanvas;
    FMapped: Boolean;
    FMapAccess: TMapAccess;
    FCanvasQuality: TCanvasQuality;
    FOnChange: TNotifyEvent;
    function GetBytesPerLine: Integer;
    function GetBytesPerPixel: Integer;
    function GetCanvas: TCanvas;
    function GetPixelFormat: TPixelFormat;
    function GetImage: TBitmapImage;
    function GetHeight: Integer;
    function GetWidth: Integer;
    function GetBitmapScale: Single;
    function GetHandle: THandle;
    procedure SetWidth(const Value: Integer);
    procedure SetHeight(const Value: Integer);
    procedure SetBitmapScale(const Scale: Single);
    procedure ReadBitmap(Stream: TStream);
    procedure WriteBitmap(Stream: TStream);
    function GetCanvasClass: TCanvasClass;
    function GetBounds: TRect;
    function GetSize: TSize;
    function GetBoundsF: TRectF;
    procedure SetCanvasQuality(const Value: TCanvasQuality);
  protected
    procedure CreateNewReference;
    procedure CopyToNewReference;
    procedure DestroyResources; virtual;
    procedure BitmapChanged; virtual;
    procedure AssignFromSurface(const Source: TBitmapSurface);
    procedure DoChange; virtual;
  protected
    procedure AssignTo(Dest: TPersistent); override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure ReadStyleLookup(Reader: TReader); virtual;
  public
    constructor Create; overload; virtual;
    constructor Create(const AWidth, AHeight: Integer); overload; virtual;
    constructor CreateFromStream(const AStream: TStream); virtual;
    constructor CreateFromFile(const AFileName: string); virtual;
    constructor CreateFromBitmapAndMask(const Bitmap, Mask: TBitmap);
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    function EqualsBitmap(const Bitmap: TBitmap): Boolean;
    procedure SetSize(const ASize: TSize); overload;
    procedure SetSize(const AWidth, AHeight: Integer); overload;
    procedure CopyFromBitmap(const Source: TBitmap); overload;
    procedure CopyFromBitmap(const Source: TBitmap; SrcRect: TRect; DestX, DestY: Integer); overload;

    function IsEmpty: Boolean;
    function HandleAllocated: Boolean;
    procedure FreeHandle;

    procedure Clear(const AColor: TAlphaColor); virtual;
    procedure ClearRect(const ARect: TRectF; const AColor: TAlphaColor = 0);
    procedure Rotate(const Angle: Single);
    procedure Resize(const AWidth, AHeight: Integer);
    procedure FlipHorizontal;
    procedure FlipVertical;
    procedure InvertAlpha;
    procedure ReplaceOpaqueColor(const Color: TAlphaColor);

    function CreateMask: PByteArray;
    procedure ApplyMask(const Mask: PByteArray; const DstX: Integer = 0; const DstY: Integer = 0);

    function CreateThumbnail(const AWidth, AHeight: Integer): TBitmap;

    function Map(const Access: TMapAccess; var Data: TBitmapData): Boolean;
    procedure Unmap(var Data: TBitmapData);

    procedure LoadFromFile(const AFileName: string);
    procedure LoadThumbnailFromFile(const AFileName: string; const AFitWidth, AFitHeight: Single;
      const UseEmbedded: Boolean = True);
    procedure SaveToFile(const AFileName: string; const SaveParams: PBitmapCodecSaveParams = nil);
    procedure LoadFromStream(Stream: TStream);
    procedure SaveToStream(Stream: TStream);

    property Canvas: TCanvas read GetCanvas;
    property CanvasClass: TCanvasClass read GetCanvasClass;
    property CanvasQuality: TCanvasQuality read FCanvasQuality write SetCanvasQuality;
    property Image: TBitmapImage read GetImage;
    property Handle: THandle read GetHandle;
    property PixelFormat: TPixelFormat read GetPixelFormat;
    property BytesPerPixel: Integer read GetBytesPerPixel;
    property BytesPerLine: Integer read GetBytesPerLine;
    /// <summary>Helper property that returns bitmap bounds in TRect</summary>
    property Bounds: TRect read GetBounds;
    /// <summary>Helper property that returns bitmap bounds in TRectF</summary>
    property BoundsF: TRectF read GetBoundsF;
    property BitmapScale: Single read GetBitmapScale write SetBitmapScale;
    property Width: Integer read GetWidth write SetWidth;
    property Height: Integer read GetHeight write SetHeight;
    /// <summary>Helper property that returns dimention of bitmap as TSize</summary>
    property Size: TSize read GetSize write SetSize;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
  end;

{ TPathData }

  TPathData = class;

  IPathObject = interface(IFreeNotificationBehavior)
    ['{8C014863-4F69-48F2-9CF7-E336BFD3F06B}']
    function GetPath: TPathData;
    property Path: TPathData read GetPath;
  end;

  TPathPointKind = (MoveTo, LineTo, CurveTo, Close);

  TPathPoint = packed record
    Kind: TPathPointKind;
    Point: TPointF;
    class function Create(const AKind: TPathPointKind; const APoint: TPointF): TPathPoint; static; inline;
    class operator Equal(const APoint1, APoint2: TPathPoint): Boolean;
    class operator NotEqual(const APoint1, APoint2: TPathPoint): Boolean;
  end;

  TPathObject = class;

  TBoundsMode = (LegacyBounds, ShapeBounds);

  TPathData = class(TInterfacedPersistent, IFreeNotification)
  private const
    MinFlatness = 0.05;
  public const
    DefaultFlatness = 0.25;
  private
    FOnChanged: TNotifyEvent;
    FStyleResource: TObject;
    FStyleLookup: string;
    FStartPoint: TPointF;
    FPathData: TList<TPathPoint>;
    FRecalcBounds: Boolean;
    FBoundsMode: TBoundsMode;
    FBounds: TRectF;
    function GetPathString: string;
    procedure SetPathString(const Value: string);
    procedure AddArcSvgPart(const Center, Radius: TPointF; StartAngle, SweepAngle: Single);
    procedure AddArcSvg(const P1, Radius: TPointF; Angle: Single; const LargeFlag, SweepFlag: Boolean; const P2: TPointF);
    function GetStyleLookup: string;
    procedure SetStyleLookup(const Value: string);
    procedure SetBoundsMode(Value: TBoundsMode);
    function GetPath: TPathData;
    function GetCount: Integer; inline;
    function GetPoint(AIndex: Integer): TPathPoint; inline;
  protected
    { rtl }
    procedure DefineProperties(Filer: TFiler); override;
    procedure ReadPath(Stream: TStream);
    procedure WritePath(Stream: TStream);
    { IFreeNotification }
    procedure FreeNotification(AObject: TObject);
    procedure DoChanged(NeedRecalcBounds: Boolean = True); virtual;
  public
    constructor Create; virtual;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    function EqualsPath(const Path: TPathData): Boolean;
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
    { creation }
    function LastPoint: TPointF;
    procedure MoveTo(const P: TPointF);
    procedure MoveToRel(const P: TPointF);
    procedure LineTo(const P: TPointF);
    procedure LineToRel(const P: TPointF);
    procedure HLineTo(const X: Single);
    procedure HLineToRel(const X: Single);
    procedure VLineTo(const Y: Single);
    procedure VLineToRel(const Y: Single);
    procedure CurveTo(const ControlPoint1, ControlPoint2, EndPoint: TPointF);
    procedure CurveToRel(const ControlPoint1, ControlPoint2, EndPoint: TPointF);
    procedure SmoothCurveTo(const ControlPoint2, EndPoint: TPointF);
    procedure SmoothCurveToRel(const ControlPoint2, EndPoint: TPointF);
    procedure QuadCurveTo(const ControlPoint, EndPoint: TPointF);
    procedure ClosePath;
    { shapes }
    procedure AddEllipse(const ARect: TRectF);
    procedure AddRectangle(const ARect: TRectF; const XRadius, YRadius: Single; const ACorners: TCorners;
      const ACornerType: TCornerType = TCornerType.Round);
    procedure AddArc(const Center, Radius: TPointF; StartAngle, SweepAngle: Single);
    { modification }
    procedure AddPath(APath: TPathData);
    procedure Clear;
    procedure Flatten(const Flatness: Single = DefaultFlatness);
    procedure Scale(const ScaleX, ScaleY: Single); overload;
    procedure Scale(const AScale: TPointF); overload; inline;
    procedure Translate(const DX, DY: Single); overload;
    procedure Translate(const Delta: TPointF); overload; inline;
    procedure FitToRect(const ARect: TRectF);
    procedure ApplyMatrix(const M: TMatrix);
    { params }
    function GetBounds: TRectF;
    { convert }
    function FlattenToPolygon(var Polygon: TPolygon; const Flatness: Single = DefaultFlatness): TPointF;
    function IsEmpty: Boolean;
    { access }
    property Count: Integer read GetCount;
    property Points[AIndex: Integer]: TPathPoint read GetPoint; default;
    { resoruces }
    property ResourcePath: TPathData read GetPath;
  published
    property Data: string read GetPathString write SetPathString stored False;
    { This property allow to link path with PathObject by name. }
    property StyleLookup: string read GetStyleLookup write SetStyleLookup;
    property BoundsMode: TBoundsMode read FBoundsMode write SetBoundsMode default TBoundsMode.LegacyBounds;
  end;

{ TCanvasSaveState }

  TCanvasSaveState = class(TPersistent)
  protected
    FAssigned: Boolean;
    FFill: TBrush;
    FStroke: TStrokeBrush;
    FDash: TDashArray;
    FDashOffset: Single;
    FFont: TFont;
    FMatrix: TMatrix;
    FOffset: TPointF;
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    property Assigned: Boolean read FAssigned;
  end;

  TRegion = array of TRectF;
  TRegionArray = array of TRegion;

{ TCanvas }

  ECanvasException = class(Exception);

  TFillTextFlag = (RightToLeft);
  TFillTextFlags = set of TFillTextFlag;

  TAbstractPrinter = class(TPersistent);

  PClipRects = ^TClipRects;
  TClipRects = array of TRectF;

  ICanvasObject = interface
    ['{61166E3B-9BC3-41E3-9D9A-5C6AB6460950}']
    function GetCanvas: TCanvas;
    property Canvas: TCanvas read GetCanvas;
  end;

  IModulateCanvas = interface
    ['{B7CFFA1B-FBCF-4B36-AA32-93856F621F28}']
    function GetModulateColor: TAlphaColor;
    procedure SetModulateColor(const AColor: TAlphaColor);
    property ModulateColor: TAlphaColor read GetModulateColor write SetModulateColor;
  end;

  TCanvasStyle = (NeedGPUSurface, SupportClipRects, SupportModulation, DisableGlobalLock);
  TCanvasStyles = set of TCanvasStyle;

  TCanvasAttribute = (MaxBitmapSize);

  TCanvas = class abstract(TInterfacedPersistent)
  public const
    MaxAllowedBitmapSize = $FFFF;
    DefaultScale = 1;
  protected
    class var FLock: TObject;
  private
    FBeginSceneCount: Integer;
    FFill: TBrush;
    FStroke: TStrokeBrush;
    FParent: TWindowHandle;
    [Weak] FBitmap: TBitmap;
    FScale: Single;
    FQuality: TCanvasQuality;
    FMatrix: TMatrix;
    procedure SetFill(const Value: TBrush);
  protected type
    TMatrixMeaning = (Unknown, Identity, Translate);

    TCustomMetaBrush = class
    private
      FValid: Boolean;
    public
      property Valid: Boolean read FValid write FValid;
    end;

    TMetaBrush = class(TCustomMetaBrush)
    private
      FKind: TBrushKind;
      FColor: TAlphaColor;
      FOpacity: Single;
      FGradient: TGradient;
      FRect: TRectF;
      [Weak] FBitmapImage: TBitmapImage;
      FWrapMode: TWrapMode;
      function GetGradient: TGradient;
    public
      destructor Destroy; override;
      property Kind: TBrushKind read FKind write FKind;
      property Color: TAlphaColor read FColor write FColor;
      property Opacity: Single read FOpacity write FOpacity;
      property Rect: TRectF read FRect write FRect;
      property WrapMode: TWrapMode read FWrapMode write FWrapMode;
      property Gradient: TGradient read GetGradient;
      property Image: TBitmapImage read FBitmapImage write FBitmapImage;
    end;

    TMetaStrokeBrush = class(TCustomMetaBrush)
    private
      FCap: TStrokeCap;
      FDash: TStrokeDash;
      FJoin: TStrokeJoin;
      FDashArray: TDashArray;
      FDashOffset: Single;
    public
      property Cap: TStrokeCap read FCap write FCap;
      property Dash: TStrokeDash read FDash write FDash;
      property Join: TStrokeJoin read FJoin write FJoin;
      property DashArray: TDashArray read FDashArray write FDashArray;
      property DashOffset: Single read FDashOffset write FDashOffset;
    end;
  private
    FMatrixMeaning: TMatrixMeaning;
    FMatrixTranslate: TPointF;
    FBlending: Boolean;
    /// <summary>Indicates offset of drawing area</summary>
    FOffset: TPointF;
    procedure SetBlending(const Value: Boolean);
    class constructor Create;
    class destructor Destroy;
  type
    TCanvasSaveStateList = TObjectList<TCanvasSaveState>;
  protected
    FClippingChangeCount: Integer;
    FSavingStateCount: Integer;
    FWidth, FHeight: Integer;
    FFont: TFont;
    FCanvasSaveData: TCanvasSaveStateList;
    FPrinter: TAbstractPrinter;
    procedure FontChanged(Sender: TObject); virtual;
    { Window }
    function CreateSaveState: TCanvasSaveState; virtual;
    procedure Initialize;
    procedure UnInitialize;
    function GetCanvasScale: Single; virtual;
    { scene }
    function DoBeginScene(AClipRects: PClipRects = nil; AContextHandle: THandle = 0): Boolean; virtual;
    procedure DoEndScene; virtual;
    /// <summary>Checks if we are in BeginScene/EndScene process and raises  exception, if we are not.</summary>
    procedure RaiseIfBeginSceneCountZero;
    procedure DoFlush; virtual;
    { constructors }
    constructor CreateFromWindow(const AParent: TWindowHandle; const AWidth, AHeight: Integer;
      const AQuality: TCanvasQuality = TCanvasQuality.SystemDefault); virtual;
    constructor CreateFromBitmap(const ABitmap: TBitmap; const AQuality: TCanvasQuality = TCanvasQuality.SystemDefault); virtual;
    constructor CreateFromPrinter(const APrinter: TAbstractPrinter); virtual;
    { bitmap }
    class function DoInitializeBitmap(const Width, Height: Integer; const Scale: Single; var PixelFormat: TPixelFormat): THandle; virtual; abstract;
    class procedure DoFinalizeBitmap(var Bitmap: THandle); virtual; abstract;
    class function DoMapBitmap(const Bitmap: THandle; const Access: TMapAccess; var Data: TBitmapData): Boolean; virtual; abstract;
    class procedure DoUnmapBitmap(const Bitmap: THandle; var Data: TBitmapData); virtual; abstract;
    class procedure DoCopyBitmap(const Source, Dest: TBitmap); virtual;
    { states }
    procedure DoBlendingChanged; virtual;
    { drawing }
    /// <summary>Apply a new matrix transformations to the canvas.</summary>
    procedure DoSetMatrix(const M: TMatrix); virtual;
    procedure DoFillRect(const ARect: TRectF; const AOpacity: Single; const ABrush: TBrush); virtual; abstract;
    procedure DoFillRoundRect(const ARect: TRectF; const XRadius, YRadius: Single; const ACorners: TCorners;
      const AOpacity: Single; const ABrush: TBrush; const ACornerType: TCornerType = TCornerType.Round); virtual;
    procedure DoFillPath(const APath: TPathData; const AOpacity: Single; const ABrush: TBrush); virtual; abstract;
    procedure DoFillEllipse(const ARect: TRectF; const AOpacity: Single; const ABrush: TBrush); virtual; abstract;
    function DoFillPolygon(const Points: TPolygon; const AOpacity: Single; const ABrush: TBrush): Boolean; virtual;
    procedure DoDrawBitmap(const ABitmap: TBitmap; const SrcRect, DstRect: TRectF; const AOpacity: Single; const HighSpeed: Boolean); virtual; abstract;
    procedure DoDrawLine(const APt1, APt2: TPointF; const AOpacity: Single; const ABrush: TStrokeBrush); virtual; abstract;
    procedure DoDrawRect(const ARect: TRectF; const AOpacity: Single; const ABrush: TStrokeBrush); virtual; abstract;
    function DoDrawPolygon(const Points: TPolygon; const AOpacity: Single; const ABrush: TStrokeBrush): Boolean; virtual;
    procedure DoDrawPath(const APath: TPathData; const AOpacity: Single; const ABrush: TStrokeBrush); virtual; abstract;
    procedure DoDrawEllipse(const ARect: TRectF; const AOpacity: Single; const ABrush: TStrokeBrush); virtual; abstract;
    { Clipping }
    procedure DoIntersectClipRect(const ARect: TRectF); virtual;
    procedure DoExcludeClipRect(const ARect: TRectF); virtual;
    { Clearing }
    procedure DoClear(const Color: TAlphaColor); virtual;
    procedure DoClearRect(const ARect: TRectF; const AColor: TAlphaColor = 0); virtual;
    property Parent: TWindowHandle read FParent;
  protected
    function TransformPoint(const P: TPointF): TPointF; inline;
    function TransformRect(const Rect: TRectF): TRectF; inline;
    property MatrixMeaning: TMatrixMeaning read FMatrixMeaning;
    property MatrixTranslate: TPointF read FMatrixTranslate;
  public
    destructor Destroy; override;
    { lock }
    class procedure Lock;
    class procedure Unlock;
    { caps }
    class function GetCanvasStyle: TCanvasStyles; virtual;
    class function GetAttribute(const Value: TCanvasAttribute): Integer; virtual;
    { scene }
    procedure SetSize(const AWidth, AHeight: Integer); virtual;
    function BeginScene(AClipRects: PClipRects = nil;  AContextHandle: THandle = 0): Boolean;
    procedure EndScene;
    property BeginSceneCount: Integer read FBeginSceneCount;
    procedure Flush;
    { buffer }
    /// <summary>Clear whole canvas using Color.</summary>
    procedure Clear(const AColor: TAlphaColor); virtual;
    /// <summary>Clear rectangular area of canvas using Color.</summary>
    procedure ClearRect(const ARect: TRectF; const AColor: TAlphaColor = 0); virtual;
    /// <summary>Return True if Scale is integer value.</summary>
    function IsScaleInteger: Boolean;
    { matrix }
    procedure SetMatrix(const M: TMatrix);
    procedure MultiplyMatrix(const M: TMatrix);
    { state }
    function SaveState: TCanvasSaveState;
    procedure RestoreState(const State: TCanvasSaveState);
    { bitmap }
    class function InitializeBitmap(const Width, Height: Integer; const Scale: Single; var PixelFormat: TPixelFormat): THandle;
    class procedure FinalizeBitmap(var Bitmap: THandle);
    class function MapBitmap(const Bitmap: THandle; const Access: TMapAccess; var Data: TBitmapData): Boolean;
    class procedure UnmapBitmap(const Bitmap: THandle; var Data: TBitmapData);
    class procedure CopyBitmap(const Source, Dest: TBitmap);
    { aligning }
    function AlignToPixel(const Value: TPointF): TPointF; overload; inline;
    function AlignToPixel(const Rect: TRectF): TRectF; overload; inline;
    function AlignToPixelVertically(const Value: Single): Single; inline;
    function AlignToPixelHorizontally(const Value: Single): Single; inline;
    { clipping }
    /// <summary>Set current clipping area using intersection of current area and rectangle.</summary>
    procedure IntersectClipRect(const ARect: TRectF); virtual;
    /// <summary>Exclude rectangular area from current clipping area.</summary>
    procedure ExcludeClipRect(const ARect: TRectF); virtual;
    { drawing }
    procedure FillArc(const Center, Radius: TPointF; StartAngle, SweepAngle: Single; const AOpacity: Single); overload;
    procedure FillArc(const Center, Radius: TPointF; StartAngle, SweepAngle: Single;
      const AOpacity: Single; const ABrush: TBrush); overload;
    procedure FillRect(const ARect: TRectF; const XRadius, YRadius: Single; const ACorners: TCorners;
      const AOpacity: Single; const ACornerType: TCornerType = TCornerType.Round); overload;
    procedure FillRect(const ARect: TRectF; const XRadius, YRadius: Single; const ACorners: TCorners;
      const AOpacity: Single; const ABrush: TBrush; const ACornerType: TCornerType = TCornerType.Round); overload;
    procedure FillRect(const ARect: TRectF; const AOpacity: Single); overload;
    procedure FillRect(const ARect: TRectF; const AOpacity: Single; const ABrush: TBrush); overload;
    procedure FillPath(const APath: TPathData; const AOpacity: Single); overload;
    procedure FillPath(const APath: TPathData; const AOpacity: Single; const ABrush: TBrush); overload;
    procedure FillEllipse(const ARect: TRectF; const AOpacity: Single); overload;
    procedure FillEllipse(const ARect: TRectF; const AOpacity: Single; const ABrush: TBrush); overload;
    procedure DrawBitmap(const ABitmap: TBitmap; const SrcRect, DstRect: TRectF; const AOpacity: Single;
      const HighSpeed: Boolean = False);
    procedure DrawLine(const APt1, APt2: TPointF; const AOpacity: Single); overload;
    procedure DrawLine(const APt1, APt2: TPointF; const AOpacity: Single; const ABrush: TStrokeBrush); overload;
    procedure DrawRect(const ARect: TRectF; const XRadius, YRadius: Single; const ACorners: TCorners;
      const AOpacity: Single; const ACornerType: TCornerType = TCornerType.Round); overload;
    procedure DrawRect(const ARect: TRectF; const XRadius, YRadius: Single; const ACorners: TCorners;
      const AOpacity: Single; const ABrush: TStrokeBrush; const ACornerType: TCornerType = TCornerType.Round); overload;
    procedure DrawRect(const ARect: TRectF; const AOpacity: Single); overload;
    procedure DrawRect(const ARect: TRectF; const AOpacity: Single; const ABrush: TStrokeBrush); overload;
    procedure DrawPath(const APath: TPathData; const AOpacity: Single); overload;
    procedure DrawPath(const APath: TPathData; const AOpacity: Single; const ABrush: TStrokeBrush); overload;
    procedure DrawEllipse(const ARect: TRectF; const AOpacity: Single); overload;
    procedure DrawEllipse(const ARect: TRectF; const AOpacity: Single; const ABrush: TStrokeBrush); overload;
    procedure DrawArc(const Center, Radius: TPointF; StartAngle, SweepAngle: Single; const AOpacity: Single); overload;
    procedure DrawArc(const Center, Radius: TPointF; StartAngle, SweepAngle: Single; const AOpacity: Single; const ABrush: TStrokeBrush); overload;
    { mesauring }
    function PtInPath(const APoint: TPointF; const APath: TPathData): Boolean; virtual; abstract;
    { helpers }
    procedure DrawRectSides(const ARect: TRectF; const XRadius, YRadius: Single; const ACorners: TCorners;
      const AOpacity: Single; const ASides: TSides; const ACornerType: TCornerType = TCornerType.Round); overload;
    procedure DrawRectSides(const ARect: TRectF; const XRadius, YRadius: Single; const ACorners: TCorners;
      const AOpacity: Single; const ASides: TSides; const ABrush: TStrokeBrush; const ACornerType: TCornerType = TCornerType.Round); overload;
    procedure DrawDashRect(const ARect: TRectF; const XRadius, YRadius: Single; const ACorners: TCorners;
      const AOpacity: Single; const AColor: TAlphaColor);
    { linear polygon }
    procedure FillPolygon(const Points: TPolygon; const AOpacity: Single); virtual;
    procedure DrawPolygon(const Points: TPolygon; const AOpacity: Single); virtual;
    { text }
    function LoadFontFromStream(const AStream: TStream): Boolean; virtual;
    { deprecated, use TTextLayout }
    procedure FillText(const ARect: TRectF; const AText: string; const WordWrap: Boolean; const AOpacity: Single;
      const Flags: TFillTextFlags; const ATextAlign: TTextAlign; const AVTextAlign: TTextAlign = TTextAlign.Center); virtual;
    procedure MeasureText(var ARect: TRectF; const AText: string; const WordWrap: Boolean; const Flags: TFillTextFlags;
      const ATextAlign: TTextAlign; const AVTextAlign: TTextAlign = TTextAlign.Center); virtual;
    procedure MeasureLines(const ALines: TLineMetricInfo; const ARect: TRectF; const AText: string; const WordWrap: Boolean; const Flags: TFillTextFlags;
      const ATextAlign: TTextAlign; const AVTextAlign: TTextAlign = TTextAlign.Center); virtual;
    function TextToPath(Path: TPathData; const ARect: TRectF; const AText: string; const WordWrap: Boolean;
      const ATextAlign: TTextAlign; const AVTextAlign: TTextAlign = TTextAlign.Center): Boolean; virtual;
    function TextWidth(const AText: string): Single;
    function TextHeight(const AText: string): Single;
    { properties }
    property Blending: Boolean read FBlending write SetBlending;
    property Quality: TCanvasQuality read FQuality;
    property Stroke: TStrokeBrush read FStroke;
    property Fill: TBrush read FFill write SetFill;
    property Font: TFont read FFont;
    property Matrix: TMatrix read FMatrix;
    property Width: Integer read FWidth;
    property Height: Integer read FHeight;
    property Bitmap: TBitmap read FBitmap;
    property Scale: Single read FScale;
    /// <summary>Allows to offset drawing area</summary>
    property Offset: TPointF read FOffset write FOffset;
    { statistics }
    property ClippingChangeCount: Integer read FClippingChangeCount;
    property SavingStateCount: Integer read FSavingStateCount;
  end;

  ECanvasManagerException = class(Exception);

  TCanvasDestroyMessage = class(TMessage);

  TCanvasManager = class sealed
  private type
    TCanvasClassRec = record
      CanvasClass: TCanvasClass;
      Default: Boolean;
      PrinterCanvas: Boolean;
    end;
  strict private
    class var FCanvasList: TList<TCanvasClassRec>;
    class var FDefaultCanvasClass: TCanvasClass;
    class var FDefaultPrinterCanvasClass: TCanvasClass;
    class var FMeasureBitmap: TBitmap;
    class var FEnableSoftwareCanvas: Boolean;
  private
    class function GetDefaultCanvas: TCanvasClass; static;
    class function GetMeasureCanvas: TCanvas; static;
    class function GetDefaultPrinterCanvas: TCanvasClass; static;
  public
    // Reserved for internal use only - do not call directly!
    class procedure UnInitialize;
    // Register a rendering Canvas class
    class procedure RegisterCanvas(const CanvasClass: TCanvasClass; const ADefault: Boolean; const APrinterCanvas: Boolean);
    // Return default Canvas
    class property DefaultCanvas: TCanvasClass read GetDefaultCanvas;
    // Return default Canvas
    class property DefaultPrinterCanvas: TCanvasClass read GetDefaultPrinterCanvas;
    // Return canvas instance used for text measuring for example
    class property MeasureCanvas: TCanvas read GetMeasureCanvas;
    // Creation helper
    class function CreateFromWindow(const AParent: TWindowHandle; const AWidth, AHeight: Integer;
      const AQuality: TCanvasQuality = TCanvasQuality.SystemDefault): TCanvas;
    class function CreateFromBitmap(const ABitmap: TBitmap;
      const AQuality: TCanvasQuality = TCanvasQuality.SystemDefault): TCanvas;
    class function CreateFromPrinter(const APrinter: TAbstractPrinter): TCanvas;
    class procedure RecreateFromPrinter(const Canvas: TCanvas; const APrinter: TAbstractPrinter);
    class procedure EnableSoftwareCanvas(const Enable: Boolean);
  end;

  TPrinterCanvas = class(TCanvas);
  TPrinterCanvasClass = class of TPrinterCanvas;

{ TBrushObject }

  IBrushObject = interface(IFreeNotificationBehavior)
    ['{BB870DB6-0228-4165-9906-CF75BFF8C7CA}']
    function GetBrush: TBrush;
    property Brush: TBrush read GetBrush;
  end;

  TBrushObject = class(TFmxObject, IBrushObject)
  private
    FBrush: TBrush;
    { IBrushObject }
    function GetBrush: TBrush;
  protected
    procedure SetName(const NewName: TComponentName); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function TryGetSolidColor(out AColor: TAlphaColor): Boolean;
  published
    property Brush: TBrush read FBrush write FBrush;
  end;

{ TFontObject }

  IFontObject = interface(IFreeNotificationBehavior)
    ['{F87FBCFE-CE5F-430C-8F46-B20B2E395C1B}']
    function GetFont: TFont;
    property Font: TFont read GetFont;
  end;

  TFontObject = class(TFmxObject, IFontObject)
  private
    FFont: TFont;
    { IFontObject }
    function GetFont: TFont;
  protected
    procedure SetName(const NewName: TComponentName); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Font: TFont read FFont write FFont;
  end;

{ TPathObject }

  TPathObject = class(TFmxObject, IPathObject)
  private
    FPath: TPathData;
    { IPathObject }
    function GetPath: TPathData;
  protected
    procedure SetName(const NewName: TComponentName); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Path: TPathData read FPath write FPath;
  end;

{ TBitmapObject }

  TBitmapObject = class(TFmxObject, IBitmapObject)
  private
    FBitmap: TBitmap;
    { IBitmapObject }
    function GetBitmap: TBitmap;
  protected
    procedure SetName(const NewName: TComponentName); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Bitmap: TBitmap read FBitmap write FBitmap;
  end;

{ TColorObject }

  TColorObject = class(TFmxObject)
  private
    FColor: TAlphaColor;
  protected
    procedure SetName(const NewName: TComponentName); override;
  published
    property Color: TAlphaColor read FColor write FColor;
  end;

  TFontColorForStateClass = class of TFontColorForState;

  TFontColorForState = class(TPersistent)
  public type
    TIndex = (Normal, Hot, Pressed, Focused, Active);
  private
    [Weak] FOwner: TTextSettings;
    FColor: array [TIndex] of TAlphaColor;
    FUpdateCount: Integer;
    FChanged: Boolean;
    function GetColor(const Index: TIndex): TAlphaColor;
    procedure SetColor(const Index: TIndex; const Value: TAlphaColor);
  protected
    function GetOwner: TPersistent; override;
    function GetCurrentColor(const Index: TIndex): TAlphaColor; virtual;
    procedure DoChanged; virtual;
  public
    constructor Create(const AOwner: TTextSettings); virtual;
    procedure AfterConstruction; override;
    procedure BeginUpdate;
    procedure EndUpdate;
    procedure Change;
    property Owner: TTextSettings read FOwner;
    procedure Assign(Source: TPersistent); override;
    function Equals(Obj: TObject): Boolean; override;
    property CurrentColor[const Index: TIndex]: TAlphaColor read GetCurrentColor;
    property Color[const Index: TIndex]: TAlphaColor read GetColor write SetColor; default;
    property Normal: TAlphaColor index TIndex.Normal read GetColor write SetColor default TAlphaColorRec.Null;
    property Hot: TAlphaColor index TIndex.Hot read GetColor write SetColor default TAlphaColorRec.Null;
    property Pressed: TAlphaColor index TIndex.Pressed read GetColor write SetColor default TAlphaColorRec.Null;
    property Focused: TAlphaColor index TIndex.Focused read GetColor write SetColor default TAlphaColorRec.Null;
    property Active: TAlphaColor index TIndex.Active read GetColor write SetColor default TAlphaColorRec.Null;
  end;

  TTextSettingsClass = class of TTextSettings;

  /// <summary>
  /// This class combines some of properties that relate to the text
  /// </summary>
  TTextSettings = class(TPersistent)
  private
    [Weak] FOwner: TPersistent;
    FFont: TFont;
    FUpdateCount: Integer;
    FHorzAlign: TTextAlign;
    FVertAlign: TTextAlign;
    FWordWrap: Boolean;
    FFontColor: TAlphaColor;
    FIsChanged: Boolean;
    FIsAdjustChanged: Boolean;
    FOnChanged: TNotifyEvent;
    FTrimming: TTextTrimming;
    FFontColorForState: TFontColorForState;
    procedure SetFontColor(const Value: TAlphaColor);
    procedure SetHorzAlign(const Value: TTextAlign);
    procedure SetVertAlign(const Value: TTextAlign);
    procedure SetWordWrap(const Value: Boolean);
    procedure SetTrimming(const Value: TTextTrimming);
    procedure SetFontColorForState(const Value: TFontColorForState);
    function StoreFontColorForState: Boolean;
    function CreateFontColorForState: TFontColorForState;
  protected
    procedure DoChanged; virtual;
    procedure SetFont(const Value: TFont); virtual;
    function GetOwner: TPersistent; override;
    function GetTextColorsClass: TFontColorForStateClass; virtual;
    procedure DoAssign(const Source: TTextSettings); virtual;
    procedure DoAssignNotStyled(const TextSettings: TTextSettings; const StyledSettings: TStyledSettings); virtual;
  public
    constructor Create(const AOwner: TPersistent); virtual;
    destructor Destroy; override;
    procedure AfterConstruction; override;
    procedure Assign(Source: TPersistent); override;
    procedure AssignNotStyled(const TextSettings: TTextSettings; const StyledSettings: TStyledSettings);
    function Equals(Obj: TObject): Boolean; override;
    procedure Change;
    procedure BeginUpdate;
    procedure EndUpdate;
    procedure UpdateStyledSettings(const OldTextSettings, DefaultTextSettings: TTextSettings;
      var StyledSettings: TStyledSettings); virtual;
    property UpdateCount: Integer read FUpdateCount;
    property IsChanged: Boolean read FIsChanged write FIsChanged;
    property IsAdjustChanged: Boolean read FIsAdjustChanged write FIsAdjustChanged;
    property Font: TFont read FFont write SetFont;
    property FontColor: TAlphaColor read FFontColor write SetFontColor default TAlphaColorRec.Black;
    property FontColorForState: TFontColorForState read FFontColorForState write SetFontColorForState
      stored StoreFontColorForState;
    property HorzAlign: TTextAlign read FHorzAlign write SetHorzAlign default TTextAlign.Leading;
    property VertAlign: TTextAlign read FVertAlign write SetVertAlign default TTextAlign.Center;
    property WordWrap: Boolean read FWordWrap write SetWordWrap default False;
    property Trimming: TTextTrimming read FTrimming write SetTrimming default TTextTrimming.None;
    property Owner: TPersistent read FOwner;
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
  end;

  ITextSettings = interface
    ['{FD99635D-D8DB-4E26-B36F-97D3AABBCCB3}']
    function GetDefaultTextSettings: TTextSettings;
    function GetTextSettings: TTextSettings;
    procedure SetTextSettings(const Value: TTextSettings);
    function GetResultingTextSettings: TTextSettings;
    function GetStyledSettings: TStyledSettings;
    procedure SetStyledSettings(const Value: TStyledSettings);

    property DefaultTextSettings: TTextSettings read GetDefaultTextSettings;
    property TextSettings: TTextSettings read GetTextSettings write SetTextSettings;
    property ResultingTextSettings: TTextSettings read GetResultingTextSettings;
    property StyledSettings: TStyledSettings read GetStyledSettings write SetStyledSettings;
  end;

//== INTERFACE END: FMX.Graphics
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Ani (from FMX.Ani.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type

  TAnimation = class;

  ITriggerAnimation = interface
  ['{8A291102-742F-45CB-9159-4E1D283AAF20}']
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const APropertyName: string);
    procedure StartTriggerAnimationWait(const AInstance: TFmxObject; const APropertyName: string);
  end;

  /// <summary>Helpers class for quick using animation. Don't use synchronous animation on the Android.
  /// Android uses asynchronous animation model.</summary>
  TAnimator = class
  private type
    IAnimationDestroyer = interface
    ['{3597F657-95E3-4E21-992D-C834EE541F1D}']
      procedure RegisterAnimation(const AAnimation: TAnimation);
    end;
    TAnimationDestroyer = class(TInterfacedObject, IFreeNotification, IAnimationDestroyer)
    private
      FAnimations: TList<Pointer>;
      procedure DoAniFinished(Sender: TObject);
      { IFreeNotification }
      procedure FreeNotification(AObject: TObject);
    public
      constructor Create;
      destructor Destroy; override;
      procedure RegisterAnimation(const AAnimation: TAnimation);
    end;
  private class var
    FDestroyer: IAnimationDestroyer;
  private
    class procedure CreateDestroyer;
    class procedure Uninitialize;
  public
    { animations }
    class procedure StartAnimation(const Target: TFmxObject; const AName: string);
    class procedure StopAnimation(const Target: TFmxObject; const AName: string);
    class procedure StartTriggerAnimation(const Target: TFmxObject; const AInstance: TFmxObject; const APropertyName: string);
    class procedure StartTriggerAnimationWait(const Target: TFmxObject; const AInstance: TFmxObject; const APropertyName: string);
    class procedure StopTriggerAnimation(const Target: TFmxObject; const AInstance: TFmxObject; const APropertyName: string);
    { default }
    class procedure DefaultStartTriggerAnimation(const Target, AInstance: TFmxObject; const APropertyName: string); static;
    class procedure DefaultStartTriggerAnimationWait(const Target: TFmxObject; const AInstance: TFmxObject; const APropertyName: string);
    { animation property }
    /// <summary>Asynchronously animates float type property and don't wait finishing of animation.</summary>
    class procedure AnimateFloat(const Target: TFmxObject; const APropertyName: string; const NewValue: Single; Duration: Single = 0.2;
      AType: TAnimationType = TAnimationType.In; AInterpolation: TInterpolationType = TInterpolationType.Linear);
    /// <summary>Asynchronously animates float type property with start delay and don't wait finishing of animation.</summary>
    class procedure AnimateFloatDelay(const Target: TFmxObject; const APropertyName: string; const NewValue: Single; Duration: Single = 0.2;
      Delay: Single = 0.0; AType: TAnimationType = TAnimationType.In;
      AInterpolation: TInterpolationType = TInterpolationType.Linear);
    /// <summary>Synchronously animates float type property and wait finishing of animation.</summary>
    /// <remarks>Don't use it on the Android. See detains in comment <c>TAnimator</c>.</remarks>
    class procedure AnimateFloatWait(const Target: TFmxObject; const APropertyName: string; const NewValue: Single; Duration: Single = 0.2;
      AType: TAnimationType = TAnimationType.In; AInterpolation: TInterpolationType = TInterpolationType.Linear);
    /// <summary>Asynchronously animates integer type property and don't wait finishing of animation.</summary>
    class procedure AnimateInt(const Target: TFmxObject; const APropertyName: string; const NewValue: Integer; Duration: Single = 0.2;
      AType: TAnimationType = TAnimationType.In; AInterpolation: TInterpolationType = TInterpolationType.Linear);
    /// <summary>Synchronously animates integer type property and wait finishing of animation.</summary>
    /// <remarks>Don't use it on the Android. See detains in comment <c>TAnimator</c>.</remarks>
    class procedure AnimateIntWait(const Target: TFmxObject; const APropertyName: string; const NewValue: Integer; Duration: Single = 0.2;
      AType: TAnimationType = TAnimationType.In; AInterpolation: TInterpolationType = TInterpolationType.Linear);
    /// <summary>Asynchronously animates color type property and don't wait finishing of animation.</summary>
    class procedure AnimateColor(const Target: TFmxObject; const APropertyName: string; NewValue: TAlphaColor; Duration: Single = 0.2;
      AType: TAnimationType = TAnimationType.In; AInterpolation: TInterpolationType = TInterpolationType.Linear);
    /// <summary>Stops all current animations of specified property of <c>Target</c> object.</summary>
    class procedure StopPropertyAnimation(const Target: TFmxObject; const APropertyName: string);
  end;

{ TAnimation }

  /// <summary>Trigger responsible for starting the animation.</summary>
  TAnimationTrigger = class
  public type
    TTriggerInfo = record
      Name: string;
      Value: Boolean;
      Prop: TRttiProperty;
    end;
  private
    FTrigger: TTrigger;
    FNames: TDictionary<TTrigger, TTrigger>;
    FRttiInfo: TList<TTriggerInfo>;
    FTargetClass: TClass;
    procedure SetTrigger(const ATrigger: TTrigger);
    procedure ParseTriggerNames(const ATrigger: TTrigger);
    { Rtti info }
    procedure CollectRttiInfo(const ATarget: TObject);
    procedure ClearRttiInfo;
  public
    destructor Destroy; override;
    /// <summary>Whether the trigger condition contains the specified property?</summary>
    function HasProperty(const APropertyName: string): Boolean;
    /// <summary>Is trigger condition is true for specified object <c>ATarget</c>.?</summary>
    function CanExecute(const ATarget: TObject): Boolean;

    /// <summary>Condition for starting animation. Contains list of pairs PropertyName and boolean value separated
    /// by semicolons</summary>
    property Trigger: TTrigger read FTrigger write SetTrigger;
  end;

  TAnimation = class(TFmxObject)
  public const
    DefaultAniFrameRate = 60;
  public class var
    AniFrameRate: Integer;
  private type
    TTriggerType = (Normal, Inverse);
  private class var
    FAniThread: TTimer;
  private
    FTickCount: Integer;
    FDuration: Single;
    FDelay: Single;
    FDelayTime: Single;
    FTime: Single;
    FInverse: Boolean;
    FSavedInverse: Boolean;
    FLoop: Boolean;
    FPause: Boolean;
    FRunning: Boolean;
    FOnFinish: TNotifyEvent;
    FOnProcess: TNotifyEvent;
    FInterpolation: TInterpolationType;
    FAnimationType: TAnimationType;
    FEnabled: Boolean;
    FAutoReverse: Boolean;
    { Triggers }
    FTriggers: array [TTriggerType] of TAnimationTrigger;
    procedure SetEnabled(const Value: Boolean);
    procedure SetTrigger(const Index: TTriggerType; const Value: TTrigger);
    function GetTrigger(const Index: TTriggerType): TTrigger;
    class procedure Uninitialize;
  protected
    ///<summary>Return normalized CurrentTime value between 0..1 </summary>
    function GetNormalizedTime: Single;
    procedure FirstFrame; virtual;
    procedure ProcessAnimation; virtual; abstract;
    procedure DoProcess; virtual;
    procedure DoFinish; virtual;
    procedure Loaded; override;
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure Start; virtual;
    procedure Stop; virtual;
    procedure StopAtCurrent; virtual;
    /// <summary>Tries to start animation by property name <c>APropertyName</c>. Checks specified properties values
    /// of <c>AInstance</c> in trigger.</summary>
    /// <remarks>If <c>AInstance</c> is not specified, then animation will not start.</remarks>
    procedure StartTrigger(const AInstance: TFmxObject; const APropertyName: string);
    /// <summary>Stops current animation, if specified property <c>APropertyName</c> is in one of triggers.</summary>
    procedure StopTrigger(const AInstance: TFmxObject; const APropertyName: string);
    procedure ProcessTick(const ATime, ADeltaTime: Single);
    property Running: Boolean read FRunning;
    property Pause: Boolean read FPause write FPause;
    property AnimationType: TAnimationType read FAnimationType write FAnimationType default TAnimationType.In;
    property AutoReverse: Boolean read FAutoReverse write FAutoReverse default False;
    property Enabled: Boolean read FEnabled write SetEnabled default False;
    property Delay: Single read FDelay write FDelay;
    property Duration: Single read FDuration write FDuration nodefault;
    property Interpolation: TInterpolationType read FInterpolation write FInterpolation default TInterpolationType.Linear;
    property Inverse: Boolean read FInverse write FInverse default False;
    ///<summary>Normalized CurrentTime value between 0..1 </summary>
    property NormalizedTime: Single read GetNormalizedTime;
    property Loop: Boolean read FLoop write FLoop default False;
    property Trigger: TTrigger index TTriggerType.Normal read GetTrigger write SetTrigger;
    property TriggerInverse: TTrigger index TTriggerType.Inverse read GetTrigger write SetTrigger;
    property CurrentTime: Single read FTime;
    property OnProcess: TNotifyEvent read FOnProcess write FOnProcess;
    property OnFinish: TNotifyEvent read FOnFinish write FOnFinish;
    class property AniThread: TTimer read FAniThread;
  end;

{ TCustomPropertyAnimation }

  TCustomPropertyAnimation = class(TAnimation)
  private
  protected
    FInstance: TObject;
    FRttiProperty: TRttiProperty;
    FPath, FPropertyName: string;
    procedure SetPropertyName(const AValue: string);
    function FindProperty: Boolean;
    procedure ParentChanged; override;
    procedure AssignTo(Dest: TPersistent); override;
  public
    property PropertyName: string read FPropertyName write SetPropertyName;
    procedure Start; override;
    procedure Stop; override;
  end;

{ TFloatAnimation }

  TFloatAnimation = class(TCustomPropertyAnimation)
  private
    FStartFloat: Single;
    FStopFloat: Single;
    FStartFromCurrent: Boolean;
  protected
    procedure ProcessAnimation; override;
    procedure FirstFrame; override;
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property AnimationType default TAnimationType.In;
    property AutoReverse default False;
    property Enabled default False;
    property Delay;
    property Duration nodefault;
    property Interpolation default TInterpolationType.Linear;
    property Inverse default False;
    property Loop default False;
    property OnProcess;
    property OnFinish;
    property PropertyName;
    property StartValue: Single read FStartFloat write FStartFloat stored True nodefault;
    property StartFromCurrent: Boolean read FStartFromCurrent write FStartFromCurrent default False;
    property StopValue: Single read FStopFloat write FStopFloat stored True nodefault;
    property Trigger;
    property TriggerInverse;
  end;

{ TIntAnimation }

  TIntAnimation = class(TCustomPropertyAnimation)
  private
    FStartValue: Integer;
    FStopValue: Integer;
    FStartFromCurrent: Boolean;
  protected
    procedure ProcessAnimation; override;
    procedure FirstFrame; override;
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property AnimationType default TAnimationType.In;
    property AutoReverse default False;
    property Enabled default False;
    property Delay;
    property Duration nodefault;
    property Interpolation default TInterpolationType.Linear;
    property Inverse default False;
    property Loop default False;
    property OnProcess;
    property OnFinish;
    property PropertyName;
    property StartValue: Integer read FStartValue write FStartValue stored True nodefault;
    property StartFromCurrent: Boolean read FStartFromCurrent write FStartFromCurrent default False;
    property StopValue: Integer read FStopValue write FStopValue stored True nodefault;
    property Trigger;
    property TriggerInverse;
  end;

{ TColorAnimation }

  TColorAnimation = class(TCustomPropertyAnimation)
  private
    FStartColor: TAlphaColor;
    FStopColor: TAlphaColor;
    FStartFromCurrent: Boolean;
  protected
    procedure ProcessAnimation; override;
    procedure FirstFrame; override;
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property AnimationType default TAnimationType.In;
    property AutoReverse default False;
    property Enabled default False;
    property Delay;
    property Duration nodefault;
    property Interpolation default TInterpolationType.Linear;
    property Inverse default False;
    property Loop default False;
    property OnProcess;
    property OnFinish;
    property PropertyName;
    property StartValue: TAlphaColor read FStartColor write FStartColor;
    property StartFromCurrent: Boolean read FStartFromCurrent write FStartFromCurrent default False;
    property StopValue: TAlphaColor read FStopColor write FStopColor;
    property Trigger;
    property TriggerInverse;
  end;

{ TGradientAnimation }

  TGradientAnimation = class(TCustomPropertyAnimation)
  private
    FStartGradient: TGradient;
    FStopGradient: TGradient;
    FStartFromCurrent: Boolean;
    procedure SetStartGradient(const Value: TGradient);
    procedure SetStopGradient(const Value: TGradient);
  protected
    procedure ProcessAnimation; override;
    procedure FirstFrame; override;
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property AnimationType default TAnimationType.In;
    property AutoReverse default False;
    property Enabled default False;
    property Delay;
    property Duration nodefault;
    property Interpolation default TInterpolationType.Linear;
    property Inverse default False;
    property Loop default False;
    property OnProcess;
    property OnFinish;
    property PropertyName;
    property StartValue: TGradient read FStartGradient write SetStartGradient;
    property StartFromCurrent: Boolean read FStartFromCurrent write FStartFromCurrent default False;
    property StopValue: TGradient read FStopGradient write SetStopGradient;
    property Trigger;
    property TriggerInverse;
  end;

{ TRectAnimation }

  TRectAnimation = class(TCustomPropertyAnimation)
  private
    FStartRect: TBounds;
    FCurrent: TBounds;
    FStopRect: TBounds;
    FStartFromCurrent: Boolean;
    procedure SetStartRect(const Value: TBounds);
    procedure SetStopRect(const Value: TBounds);
  protected
    procedure ProcessAnimation; override;
    procedure FirstFrame; override;
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property AnimationType default TAnimationType.In;
    property AutoReverse default False;
    property Enabled default False;
    property Delay;
    property Duration nodefault;
    property Interpolation default TInterpolationType.Linear;
    property Inverse default False;
    property Loop default False;
    property OnProcess;
    property OnFinish;
    property PropertyName;
    property StartValue: TBounds read FStartRect write SetStartRect;
    property StartFromCurrent: Boolean read FStartFromCurrent write FStartFromCurrent default False;
    property StopValue: TBounds read FStopRect write SetStopRect;
    property Trigger;
    property TriggerInverse;
  end;

{ TBitmapAnimation }

  TBitmapAnimation = class(TCustomPropertyAnimation)
  private
    FStartBitmap: TBitmap;
    FStopBitmap: TBitmap;
    procedure SetStartBitmap(Value: TBitmap);
    procedure SetStopBitmap(Value: TBitmap);
  protected
    procedure ProcessAnimation; override;
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property AnimationType default TAnimationType.In;
    property AutoReverse default False;
    property Enabled default False;
    property Delay;
    property Duration nodefault;
    property Interpolation default TInterpolationType.Linear;
    property Inverse default False;
    property Loop default False;
    property OnProcess;
    property OnFinish;
    property PropertyName;
    property StartValue: TBitmap read FStartBitmap write SetStartBitmap;
    property StopValue: TBitmap read FStopBitmap write SetStopBitmap;
    property Trigger;
    property TriggerInverse;
  end;

{ TBitmapListAnimation }

  TBitmapListAnimation = class(TCustomPropertyAnimation)
  private type
    TAnimationBitmap = class(TBitmap)
    private
      [Weak] FAnimation: TBitmapListAnimation;
    protected
      procedure ReadStyleLookup(Reader: TReader); override;
    end;
  private
    FAnimationCount: Integer;
    FAnimationBitmap: TBitmap;
    FLastAnimationStep: Integer;
    FAnimationRowCount: Integer;
    FAnimationLookup: string;
    procedure SetAnimationBitmap(Value: TBitmap);
    procedure SetAnimationRowCount(const Value: Integer);
    procedure SetAnimationLookup(const Value: string);
    procedure RefreshBitmap(const WorkBitmap: TBitmap = nil);
  protected
    procedure ProcessAnimation; override;
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property AnimationBitmap: TBitmap read FAnimationBitmap write SetAnimationBitmap;
    property AnimationLookup: string read FAnimationLookup write SetAnimationLookup;
    property AnimationCount: Integer read FAnimationCount write FAnimationCount;
    property AnimationRowCount: Integer read FAnimationRowCount write SetAnimationRowCount default 1;
    property AnimationType default TAnimationType.In;
    property AutoReverse default False;
    property Enabled default False;
    property Delay;
    property Duration nodefault;
    property Interpolation default TInterpolationType.Linear;
    property Inverse default False;
    property Loop default False;
    property OnProcess;
    property OnFinish;
    property PropertyName;
    property Trigger;
    property TriggerInverse;
  end;

{ Key Animations }

{ TKey }

  TKey = class(TCollectionItem)
  private
    FKey: Single;
    procedure SetKey(const Value: Single);
  public
    procedure Assign(Source: TPersistent); override;
  published
    property Key: Single read FKey write SetKey;
  end;

{ TKeys }

  TKeys = class(TCollection)
  public
    function FindKeys(const Time: Single; var Key1, Key2: TKey): Boolean;
  end;

{ TColorKey }

  TColorKey = class(TKey)
  private
    FValue: TAlphaColor;
  public
    procedure Assign(Source: TPersistent); override;
  published
    property Value: TAlphaColor read FValue write FValue;
  end;

{ TColorKeyAnimation }

  TColorKeyAnimation = class(TCustomPropertyAnimation)
  private
    FKeys: TKeys;
    FStartFromCurrent: Boolean;
    procedure SetKeys(const Value: TKeys);
  protected
    procedure ProcessAnimation; override;
    procedure FirstFrame; override;
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property AnimationType default TAnimationType.In;
    property AutoReverse default False;
    property Enabled default False;
    property Delay;
    property Duration nodefault;
    property Interpolation default TInterpolationType.Linear;
    property Inverse default False;
    property Keys: TKeys read FKeys write SetKeys;
    property Loop default False;
    property OnProcess;
    property OnFinish;
    property PropertyName;
    property StartFromCurrent: Boolean read FStartFromCurrent write FStartFromCurrent;
    property Trigger;
    property TriggerInverse;
  end;

{ TFloatKey }

  TFloatKey = class(TKey)
  private
    FValue: Single;
  published
    property Value: Single read FValue write FValue;
  end;

{ TFloatKeyAnimation }

  TFloatKeyAnimation = class(TCustomPropertyAnimation)
  private
    FKeys: TKeys;
    FStartFromCurrent: Boolean;
    procedure SetKeys(const Value: TKeys);
  protected
    procedure ProcessAnimation; override;
    procedure FirstFrame; override;
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property AnimationType default TAnimationType.In;
    property AutoReverse default False;
    property Enabled default False;
    property Delay;
    property Duration nodefault;
    property Interpolation default TInterpolationType.Linear;
    property Inverse default False;
    property Keys: TKeys read FKeys write SetKeys;
    property Loop default False;
    property OnProcess;
    property OnFinish;
    property PropertyName;
    property StartFromCurrent: Boolean read FStartFromCurrent write FStartFromCurrent;
    property Trigger;
    property TriggerInverse;
  end;

function InterpolateLinear(t, B, C, D: Single): Single;
function InterpolateSine(t, B, C, D: Single; AType: TAnimationType): Single;
function InterpolateQuint(t, B, C, D: Single; AType: TAnimationType): Single;
function InterpolateQuart(t, B, C, D: Single; AType: TAnimationType): Single;
function InterpolateQuad(t, B, C, D: Single; AType: TAnimationType): Single;
function InterpolateExpo(t, B, C, D: Single; AType: TAnimationType): Single;
function InterpolateElastic(t, B, C, D, A, P: Single; AType: TAnimationType): Single;
function InterpolateCubic(t, B, C, D: Single; AType: TAnimationType): Single;
function InterpolateCirc(t, B, C, D: Single; AType: TAnimationType): Single;
function InterpolateBounce(t, B, C, D: Single; AType: TAnimationType): Single;
function InterpolateBack(t, B, C, D, S: Single; AType: TAnimationType): Single;

//== INTERFACE END: FMX.Ani
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.MultiResBitmap (from FMX.MultiResBitmap.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  TCustomMultiResBitmap = class;
  TCustomBitmapItem = class;

  EMultiResBitmap = class(EComponentError)
  end;

  TBitmapOfItem = class(TBitmap)
  private
    [Weak] FBitmapItem: TCustomBitmapItem;
    FIsChanged: Boolean;
  protected
    procedure DoChange; override;
  public
    property BitmapItem: TCustomBitmapItem read FBitmapItem;
    property IsChanged: Boolean read FIsChanged write FIsChanged;
  end;

  TCustomBitmapItem = class(TCollectionItem)
  public const
    ScaleRange = -3;
    ScaleMax = 100;
    ScaleDefault = 1;
  private
    FFixed: Boolean;
    FDormant: Boolean;
    FDormantChanging: Boolean;
    FBitmap: TBitmapOfItem;
    FStream: TMemoryStream;
    [Weak] FMultiResBitmap: TCustomMultiResBitmap;
    FScale: Single;
    FFileName: string;
    FWidth: Word;
    FHeight: Word;
    function GetFixed: Boolean;
    procedure SetScale(const Value: Single);
    procedure SetBitmap(const Value: TBitmapOfItem);
    function GetBitmap: TBitmapOfItem;
    procedure ReadFileName(Reader: TReader);
    procedure WriteFileName(Writer: TWriter);
    function GetComponent: TComponent;
    procedure SetDormant(const Value: Boolean);
    procedure ReadBitmap(Stream: TStream);
    procedure WriteBitmap(Stream: TStream);
    function GetIsEmpty: Boolean;
    procedure ReadHeight(Reader: TReader);
    procedure ReadWidth(Reader: TReader);
    procedure WriteHeight(Writer: TWriter);
    procedure WriteWidth(Writer: TWriter);
  protected
    procedure SetCollection(Value: TCollection); override;
    procedure DefineProperties(Filer: TFiler); override;
    function ScaleStored: Boolean; virtual;
    procedure SetFixed(const Value: Boolean);
    function GetDisplayName: string; override;
    procedure SetIndex(Value: Integer); override;
    function BitmapStored: Boolean; virtual;
  public
    constructor Create(Collection: TCollection); override;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    function Equals(Obj: TObject): Boolean; override;
    procedure Clear;
    property MultiResBitmap: TCustomMultiResBitmap read FMultiResBitmap;
    property Fixed: Boolean read GetFixed;
    property Component: TComponent read GetComponent;
    class function ScaleOfBitmap(const SourceSize, DestinationSize: TSize): Double;
    class function RectOfBitmap(const SourceSize, DestinationSize: TSize): TRect;
    function CreateBitmap(const AFileName: string = ''): TBitmap; virtual;
    property Scale: Single read FScale write SetScale stored ScaleStored nodefault;
    property Bitmap: TBitmapOfItem read GetBitmap write SetBitmap stored False;
    property FileName: string read FFileName write FFileName stored False;
    property Dormant: Boolean read FDormant write SetDormant;
    property IsEmpty: Boolean read GetIsEmpty;
    property Width: Word read FWidth stored False;
    property Height: Word read FHeight stored False;
  end;

  TCustomBitmapItemClass = class of TCustomBitmapItem;
  TFixedBitmapItemClass = class of TFixedBitmapItem;

  TSizeKind = (Custom, Default, Source);

  TCustomMultiResBitmap = class(TOwnedCollection)
  private
    FFixed: Boolean;
    FWidth: Word;
    FHeight: Word;
    FSizeKind: TSizeKind;
    FTransparentColor: TColor;
    function GetFixed: Boolean;
    procedure ReadWidth(Reader: TReader);
    procedure WriteWidth(Writer: TWriter);
    procedure ReadHeight(Reader: TReader);
    procedure WriteHeight(Writer: TWriter);
    function GetItem(Index: Integer): TCustomBitmapItem;
    procedure SetItem(Index: Integer; const Value: TCustomBitmapItem);
    function GetComponent: TComponent;
    procedure ReadLoadSize(Reader: TReader);
    procedure WriteLoadSize(Writer: TWriter);
    procedure ReadColor(Reader: TReader);
    procedure WriteColor(Writer: TWriter);
    function GetBitmaps(Scale: Single): TBitmapOfItem;
    procedure SetBitmaps(Scale: Single; const Value: TBitmapOfItem);
  protected
    procedure SetFixed(const Value: Boolean);
    function GetDefaultSize: TSize; virtual;
    procedure Notify(Item: TCollectionItem; Action: TCollectionNotification); override;
    procedure DefineProperties(Filer: TFiler); override;
  public
    constructor Create(AOwner: TPersistent; ItemClass: TCustomBitmapItemClass);
    function ScaleArray(IncludeEmpty: Boolean): TArray<Single>;
    function ItemByScale(const AScale: Single; const ExactMatch: Boolean;
      const IncludeEmpty: Boolean): TCustomBitmapItem;
    procedure LoadItemFromStream(Stream: TStream; Scale: Single);
    procedure LoadFromStream(S: TStream); virtual;
    procedure SaveToStream(S: TStream); virtual;
    function Equals(Obj: TObject): Boolean; override;
    procedure Assign(Source: TPersistent); override;
    /// <summary> Returns the default value of
    /// <see cref="FMX.MultiResBitmap|TCustomMultiResBitmap.SizeKind">SizeKind</see> property </summary>
    function GetDefaultSizeKind: TSizeKind; virtual;
    function Add: TCustomBitmapItem;
    /// <summary> Load file adding or replacing a single image </summary>
    /// <param name="Scale"> Scale to which the file being loaded corresponds. If the image in this scale does not
    /// exist, a new item in the collection is created. Otherwise, the existing image is replaced. </param>
    /// <param name="FileName"> The name of the file </param>
    /// <returns> New or updated item in the collection</returns>
    /// <remarks> When loading, SizeKind, Width, Height, TransparentColor properties are used </remarks>
    function AddOrSet(const Scale: Single; const FileName: string): TCustomBitmapItem;
    function Insert(Index: Integer): TCustomBitmapItem;
    property Items[Index: Integer]: TCustomBitmapItem read GetItem write SetItem; default;
    property Bitmaps[Scale: Single]: TBitmapOfItem read GetBitmaps write SetBitmaps;
    property Component: TComponent read GetComponent;
    property Fixed: Boolean read GetFixed;
    property DefaultSize: TSize read GetDefaultSize;
    property SizeKind: TSizeKind read FSizeKind write FSizeKind stored False;
    property Width: Word read FWidth write FWidth stored False;
    property Height: Word read FHeight write FHeight stored False;
    property TransparentColor: TColor read FTransparentColor write FTransparentColor stored False;
  end;

  TFixedBitmapItem = class(TCustomBitmapItem)
  private
  protected
    function GetDisplayName: string; override;
  public
    constructor Create(Collection: TCollection); override;
  published
    property Scale;
    property Bitmap;
  end;

  TFixedMultiResBitmap = class(TCustomMultiResBitmap)
  private
    procedure CreateItem(Scale: Single);
    procedure CreateItems;
    function GetItem(Index: Integer): TFixedBitmapItem;
    procedure SetItem(Index: Integer; const Value: TFixedBitmapItem);
    procedure UpdateFixed;
  public
    constructor Create(AOwner: TPersistent; ItemClass: TFixedBitmapItemClass); overload;
    constructor Create(AOwner: TPersistent); overload;
    procedure EndUpdate; override;
    function Add: TFixedBitmapItem;
    function Insert(Index: Integer): TFixedBitmapItem;
    property Items[Index: Integer]: TFixedBitmapItem read GetItem write SetItem; default;
  end;

  TScaleName = record
    Scale: Single;
    Name: string;
  end;

  TScaleList = TList<TScaleName>;

  TScaleNameComparer = class(TInterfacedObject, IComparer<TScaleName>)
    function Compare(const Left, Right: TScaleName): Integer;
  end;

  IMultiResBitmapObject = interface(IBitmapObject)
    ['{D64BEB1F-D3C5-4C83-BE1C-DBBA319C0EA5}']
    function GetMultiResBitmap: TCustomMultiResBitmap;
    property MultiResBitmap: TCustomMultiResBitmap read GetMultiResBitmap;
  end;

function ScaleList: TScaleList;
function RegisterScaleName(Scale: Single; Name: string): Boolean;

//== INTERFACE END: FMX.MultiResBitmap
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Types3D (from FMX.Types3D.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


{ Points and rects }

type
  /// <summary>Record type for the information of an axis aligned box in
  /// 3D.</summary>
  TBoundingBox = record
  private
    function GetWidth: Single;
    procedure SetWidth(const Value: Single);
    function GetHeight: Single;
    procedure SetHeight(const Value: Single);
    function GetDepth: Single;
    procedure SetDepth(const Value: Single);
    //returns the center point of the box;
    function GetCenterPoint: TPoint3D;
  public
    /// <summary>Constructor with a simple vertex.</summary>
    constructor Create(const AnOrigin: TPoint3D); overload;
    /// <summary>Constructor with a vertex and the dimensions of the box.</summary>
    constructor Create(const AnOrigin: TPoint3D; const Width, Height, Depth: Single); overload;
    /// <summary>Constructor with the corners values.</summary>
    constructor Create(const Left, Top, Near, Right, Bottom, Far: Single); overload;
    /// <summary>Constructor with two corners. See Normalize function.</summary>
    constructor Create(const APoint1, APoint2: TPoint3D; NormalizeBox: Boolean = False); overload;
    /// <summary>Constructor with a reference box. See Normalize function.</summary>
    constructor Create(const ABox: TBoundingBox; NormalizeBox: Boolean = False); overload;
    /// <summary>Constructor with a point cloud.</summary>
    constructor Create(const Points: TArray<TPoint3D>); overload;
    /// <summary>Constructor with a point cloud.</summary>
    constructor Create(const Points: PPoint3D; const PointCount: Integer); overload;

    /// <summary>Equality operator taking account a default epsilon.</summary>
    class operator Equal(const LeftBox, RightBox: TBoundingBox): Boolean;
    /// <summary>Not equality operator taking account a default epsilon.</summary>
    class operator NotEqual(const LeftBox, RightBox: TBoundingBox): Boolean;

    /// <summary>Union of two boxes.</summary>
    class operator Add(const LeftBox, RightBox: TBoundingBox): TBoundingBox;

    /// <summary>Intersects two boxes.</summary>
    class operator Multiply(const LeftBox, RightBox: TBoundingBox): TBoundingBox;

    /// <summary>Returns true if the box is invalid.</summary>
    class function Empty: TBoundingBox; inline; static;

    /// <summary>This function returns the scale value that can be used to scale this box to fit into the desired area.</summary>
    function FitIntoScale(const ADesignatedArea: TBoundingBox): Single;
    /// <summary>This function returns a new box which is the original box scaled by a single value to fit into
    /// the desired area. A ARatio value is used to return the scale value used to perform this operation.</summary>
    function FitInto(const ADesignatedArea: TBoundingBox; out ARatio: Single): TBoundingBox; overload;
    /// <summary>This function returns a new box which is the original box scaled by a single value to fit into
    /// the desired area.</summary>
    function FitInto(const ADesignatedArea: TBoundingBox): TBoundingBox; overload;

    /// <summary>Makes sure TopLeftNear is above and to the left of BottomRightFar.</summary>
    function Normalize: TBoundingBox;

    /// <summary>Returns true if left = right or top = bottom or near = far.</summary>
    function IsEmpty(const Epsilon: Single = TEpsilon.Vector): Boolean;

    /// <summary>Returns true if the point is inside the box.</summary>
    function Contains(const APoint: TPoint3D): Boolean; overload;

    /// <summary>Returns true if the box encloses ABox completely.</summary>
    function Contains(const ABox: TBoundingBox): Boolean; overload;

    /// <summary>Returns true if any part of the box covers ABox.</summary>
    function IntersectsWith(const ABox: TBoundingBox): Boolean;

    /// <summary>Computes an intersection with the incoming box and returns that intersection.</summary>
    function Intersect(const DestBox: TBoundingBox): TBoundingBox;

    /// <summary>Returns the minimum box (with lowest volume) envolving this box and DestBox.</summary>
    function Union(const DestBox: TBoundingBox): TBoundingBox; overload;

    /// <summary>Offsets the box origin relative to current position.</summary>
    function Offset(const DX, DY, DZ: Single): TBoundingBox; overload;
    /// <summary>Offsets the box origin relative to current position.</summary>
    function Offset(const APoint: TPoint3D): TBoundingBox; overload;

    /// <summary>Inflate the box by DX, DY and DZ.</summary>
    function Inflate(const DX, DY, DZ: Single): TBoundingBox; overload;
    /// <summary>Inflate in all directions.</summary>
    function Inflate(const DL, DT, DN, DR, DB, DF: Single): TBoundingBox; overload;

    /// <summary>Returns the size of the box in a TPoint record.</summary>
    function GetSize: TPoint3D;

    /// <summary>The same as the equality operator, taking account a given epsilon.</summary>
    function EqualsTo(const ABox: TBoundingBox; const Epsilon: Single = 0): Boolean;

    /// <summary>When the Width value is changed, the Right value is modified, leaving the Left value
    /// unchanged.</summary>
    property Width: Single read GetWidth write SetWidth;
    /// <summary>When the Height value is changed, the Bottom value is modified, leaving the Top value
    /// unchanged.</summary>
    property Height: Single read GetHeight write SetHeight;
    /// <summary>When the Depth value is changed, the Far value is modified, leaving the Near value unchanged.</summary>
    property Depth: Single read GetDepth write SetDepth;

    /// <summary>Returns the center of the box.</summary>
    property CenterPoint: TPoint3D read GetCenterPoint;

    /// <summary>Case to couple the fields in the box.</summary>
    case Integer of
      /// <summary>Minimum and maximum corners by separated values.</summary>
      0: (Left, Top, Near, Right, Bottom, Far: Single;);
      /// <summary>Minimum and maximum corners.</summary>
      1: (TopLeftNear, BottomRightFar: TPoint3D);
      /// <summary>Minimum and maximum corners.</summary>
      2: (MinCorner, MaxCorner: TPoint3D);
  end;

  TBox = TBoundingBox deprecated 'Use TBoundingBox';
  TMatrix3DDynArray = array of TMatrix3D;
  TPoint3DDynArray = array of TPoint3D;
  TPointFDynArray = array of TPointF;

const
  NullVector3D: TVector3D = (X: 0; Y: 0; Z: 0; W: 1);
  NullPoint3D: TPoint3D = (X: 0; Y: 0; Z: 0);

  MaxLightCount = 256;

type
  TContext3D = class;
  TVertexBuffer = class;
  TIndexBuffer = class;
  TContextShader = class;
  TMaterial = class;

{ TVertexBuffer }

  TVertexFormat = (Vertex, Normal, Color0, Color1, Color2, Color3, ColorF0, ColorF1, ColorF2, ColorF3, TexCoord0, TexCoord1, TexCoord2, TexCoord3, BiNormal, Tangent);
  TVertexFormats = set of TVertexFormat;

  TVertexElement = record
    Format: TVertexFormat;
    Offset: Integer;
  end;
  TVertexDeclaration = array of TVertexElement;

  TVertexBuffer = class(TPersistent)
  private
    FBuffer: Pointer;
    FFormat: TVertexFormats;
    FLength: Integer;
    FSize: Integer;
    FVertexSize: Integer;
    FTexCoord0: Integer;
    FTexCoord1: Integer;
    FTexCoord2: Integer;
    FTexCoord3: Integer;
    FColor0: Integer;
    FColor1: Integer;
    FColor2: Integer;
    FColor3: Integer;
    FColorF0: Integer;
    FColorF1: Integer;
    FColorF2: Integer;
    FColorF3: Integer;
    FNormal: Integer;
    FBiNormal: Integer;
    FTangent: Integer;
    FSaveLength: Integer;
    function GetVertices(AIndex: Integer): TPoint3D; inline;
    function GetTexCoord0(AIndex: Integer): TPointF; inline;
    function GetColor0(AIndex: Integer): TAlphaColor; inline;
    function GetNormals(AIndex: Integer): TPoint3D; inline;
    function GetNormalsPtr(AIndex: Integer): PPoint3D; inline;
    function GetColor1(AIndex: Integer): TAlphaColor; inline;
    function GetTexCoord1(AIndex: Integer): TPointF; inline;
    function GetTexCoord2(AIndex: Integer): TPointF; inline;
    function GetTexCoord3(AIndex: Integer): TPointF; inline;
    function GetVerticesPtr(AIndex: Integer): PPoint3D; inline;
    function GetItemPtr(AIndex: Integer): Pointer; inline;
    procedure SetVertices(AIndex: Integer; const Value: TPoint3D); inline;
    procedure SetColor0(AIndex: Integer; const Value: TAlphaColor); inline;
    procedure SetNormals(AIndex: Integer; const Value: TPoint3D); inline;
    procedure SetColor1(AIndex: Integer; const Value: TAlphaColor); inline;
    procedure SetTexCoord0(AIndex: Integer; const Value: TPointF); inline;
    procedure SetTexCoord1(AIndex: Integer; const Value: TPointF); inline;
    procedure SetTexCoord2(AIndex: Integer; const Value: TPointF); inline;
    procedure SetTexCoord3(AIndex: Integer; const Value: TPointF); inline;
    procedure SetLength(const Value: Integer);
    function GetColor2(AIndex: Integer): TAlphaColor;
    function GetColor3(AIndex: Integer): TAlphaColor;
    procedure SetColor2(AIndex: Integer; const Value: TAlphaColor);
    procedure SetColor3(AIndex: Integer; const Value: TAlphaColor);
    function GetBiNormals(AIndex: Integer): TPoint3D;
    procedure SetBiNormals(AIndex: Integer; const Value: TPoint3D);
    function GetTangents(AIndex: Integer): TPoint3D;
    procedure SetTangents(AIndex: Integer; const Value: TPoint3D);
    function GetBiNormalsPtr(AIndex: Integer): PPoint3D;
    function GetTangentsPtr(AIndex: Integer): PPoint3D;
    procedure SetFormat(Value: TVertexFormats);
  protected
  public
    procedure Assign(Source: TPersistent); override;
    constructor Create(const AFormat: TVertexFormats; const ALength: Integer); virtual;
    destructor Destroy; override;
    procedure BeginDraw(const ALength: Integer);
    procedure EndDraw;
    function GetVertexDeclarations: TVertexDeclaration;
    property Buffer: Pointer read FBuffer;
    property Size: Integer read FSize;
    property VertexSize: Integer read FVertexSize;
    property Length: Integer read FLength write SetLength;
    property Format: TVertexFormats read FFormat;
    { items access }
    property ItemPtr[AIndex: Integer]: Pointer read GetItemPtr;
    property Vertices[AIndex: Integer]: TPoint3D read GetVertices write SetVertices;
    property VerticesPtr[AIndex: Integer]: PPoint3D read GetVerticesPtr;
    property Normals[AIndex: Integer]: TPoint3D read GetNormals write SetNormals;
    property NormalsPtr[AIndex: Integer]: PPoint3D read GetNormalsPtr;
    property BiNormals[AIndex: Integer]: TPoint3D read GetBiNormals write SetBiNormals;
    property BiNormalsPtr[AIndex: Integer]: PPoint3D read GetBiNormalsPtr;
    property Tangents[AIndex: Integer]: TPoint3D read GetTangents write SetTangents;
    property TangentsPtr[AIndex: Integer]: PPoint3D read GetTangentsPtr;
    property Color0[AIndex: Integer]: TAlphaColor read GetColor0 write SetColor0;
    property Color1[AIndex: Integer]: TAlphaColor read GetColor1 write SetColor1;
    property Color2[AIndex: Integer]: TAlphaColor read GetColor2 write SetColor2;
    property Color3[AIndex: Integer]: TAlphaColor read GetColor3 write SetColor3;
    property TexCoord0[AIndex: Integer]: TPointF read GetTexCoord0 write SetTexCoord0;
    property TexCoord1[AIndex: Integer]: TPointF read GetTexCoord1 write SetTexCoord1;
    property TexCoord2[AIndex: Integer]: TPointF read GetTexCoord2 write SetTexCoord2;
    property TexCoord3[AIndex: Integer]: TPointF read GetTexCoord3 write SetTexCoord3;
  end;

{ TIndexBuffer }

  TIndexFormat = (UInt16, UInt32);

  TIndexBuffer = class(TPersistent)
  private
    FBuffer: Pointer;
    FLength: Integer;
    FIndexSize: Integer;
    FSize: Integer;
    FSaveLength: Integer;
    FFormat: TIndexFormat;
    function GetIndices(AIndex: Integer): Integer; inline;
    procedure SetIndices(AIndex: Integer; const Value: Integer); inline;
    procedure SetLength(const Value: Integer);
    procedure SetFormat(const Value: TIndexFormat);
  protected
  public
    procedure Assign(Source: TPersistent); override;
    constructor Create(const ALength: Integer; const AFormat: TIndexFormat = TIndexFormat.UInt16); virtual;
    destructor Destroy; override;
    procedure BeginDraw(const ALength: Integer);
    procedure EndDraw;
    property Buffer: Pointer read FBuffer;
    property Format: TIndexFormat read FFormat write SetFormat;
    property IndexSize: Integer read FIndexSize;
    property Size: Integer read FSize;
    property Length: Integer read FLength write SetLength;
    { items access }
    property Indices[AIndex: Integer]: Integer read GetIndices write SetIndices; default;
  end;

{ TMeshData }

  TMeshVertex = packed record
    x, y, z: single;
    nx, ny, nz: single;
    tu, tv: single;
  end;

  TMeshData = class(TPersistent)
  public
  type
    TCalculateNormalMethod = (Default, Fastest, Slowest);
  private
  type
    TVertexSmoothNormalInfo = record
      VertexId: Integer;
      ScaledRoundedX, ScaledRoundedY, ScaledRoundedZ: Integer;
    end;
  private
    FVertexBuffer: TVertexBuffer;
    FIndexBuffer: TIndexBuffer;
    FOnChanged: TNotifyEvent;
    FFaceNormals: TPoint3DDynArray;
    FBoundingBox: TBoundingBox;
    FBoundingBoxUpdateNeeded: Boolean;
    function GetNormals: string;
    function GetPoint3Ds: string;
    function GetTexCoordinates: string;
    procedure SetNormals(const Value: string);
    procedure SetPoint3Ds(const Value: string);
    procedure SetTexCoordinates(const Value: string);
    function GetTriangleIndices: string;
    procedure SetTriangleIndices(const Value: string);
  protected
    procedure DefineProperties(Filer: TFiler); override;
    procedure ReadMesh(Stream: TStream);
    procedure WriteMesh(Stream: TStream);
  public
    constructor Create; virtual;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    procedure AssignFromMeshVertex(const Vertices: array of TMeshVertex; const Indices: array of Word); overload;
    procedure AssignFromMeshVertex(const Vertices: array of TMeshVertex; const Indices: array of Cardinal); overload;
    procedure ChangeFormat(const ANewFormat: TVertexFormats);
    procedure Clear;
    procedure CalcFaceNormals(const PropagateFaceNormalsToVertices: Boolean = True);
    procedure CalcSmoothNormals(const Method: TCalculateNormalMethod = TCalculateNormalMethod.Default; const WeldEpsilon: Single = 0.001);
    procedure CalcTangentBinormals;
    /// <summary>Returns the bounding box of the mesh.</summary>
    function GetBoundingBox: TBoundingBox;
    /// <summary>This function flags the mesh to inform it that it should recalculate its new bounding box because some change could be performed.</summary>
    procedure BoundingBoxNeedsUpdate;
    function RayCastIntersect(const Width, Height, Depth: Single; const RayPos, RayDir: TPoint3D;
      var Intersection: TPoint3D): Boolean; overload;
    function RayCastIntersect(const RayPos, RayDir: TPoint3D; var Intersection: TPoint3D): Boolean; overload;
    procedure Render(const AContext: TContext3D; const AMaterial: TMaterial; const AOpacity: Single);
    property FaceNormals: TPoint3DDynArray read FFaceNormals;
    property IndexBuffer: TIndexBuffer read FIndexBuffer;
    property VertexBuffer: TVertexBuffer read FVertexBuffer;
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
  published
    property Normals: string read GetNormals write SetNormals stored False;
    property Points: string read GetPoint3Ds write SetPoint3Ds stored False;
    property TexCoordinates: string read GetTexCoordinates write SetTexCoordinates stored False;
    property TriangleIndices: string read GetTriangleIndices write SetTriangleIndices stored False;
  end;

{ Shaders }

  TContextShaderKind = (VertexShader, PixelShader);

  TContextShaderVariableKind = (Float, Float2, Float3, Vector, Matrix, Texture);

  TContextShaderVariable = record
    Name: string;
    Kind: TContextShaderVariableKind;
    Index: Integer;
    Size: Integer;
    // filled at run-time
    ShaderKind: TContextShaderKind;
    TextureUnit: Integer;
    constructor Create(const Name: string; const Kind: TContextShaderVariableKind; const Index, Size: Integer);
  end;

  TContextShaderArch = (Undefined, DX9, DX10, DX11_level_9, DX11, Metal, GLSL, Mac, IOS, Android, SKSL);

  TContextShaderCode = array of Byte;
  TContextShaderVariables = array of TContextShaderVariable;

  TContextShaderSource = record
    Arch: TContextShaderArch;
    Code: TContextShaderCode;
    Variables: TContextShaderVariables;
    constructor Create(const Arch: TContextShaderArch; const ACode: array of Byte;
      const AVariables: array of TContextShaderVariable);
    function IsDefined: Boolean;
    function FindVariable(const AName: string; out AShaderVariable: TContextShaderVariable): Boolean;
  end;

  TContextShaderHandle = type THandle;

  TContextShader = class sealed
  private
    FOriginalSource: string;
    FSources: array of TContextShaderSource;
    FHandle: TContextShaderHandle;
    FKind: TContextShaderKind;
    FName: string;
    FRefCount: Integer;
    FContextLostId: TMessageSubscriptionId;
    procedure ContextLostHandler(const Sender : TObject; const Msg : TMessage);
  public
    constructor Create;
    destructor Destroy; override;
    class function BuildKey(const Name: string; const Kind: TContextShaderKind;
      const Sources: array of TContextShaderSource): string;
    function GetSourceByArch(Arch: TContextShaderArch): TContextShaderSource;
    procedure LoadFromData(const Name: string; const Kind: TContextShaderKind;
      const OriginalSource: string; const Sources: array of TContextShaderSource);
    procedure LoadFromFile(const FileName: string);
    procedure LoadFromStream(const AStream: TStream);
    procedure SaveToFile(const FileName: string);
    procedure SaveToStream(const AStream: TStream);
    property Kind: TContextShaderKind read FKind;
    property Name: string read FName;
    property OriginalSource: string read FOriginalSource;
    property Handle: TContextShaderHandle read FHandle write FHandle;
  end;

  TShaderManager = class sealed
  strict private
    class var FShaderList: TObjectDictionary<string, TContextShader>;
    class function GetShader(const Key: string): TContextShader; static;
  private
  public
    // Reserved for internal use only - do not call directly!
    class procedure UnInitialize;
    // Register shader
    class function RegisterShader(const Shader: TContextShader): TContextShader;
    // Create shader from Data and Register, return already registered if exists
    class function RegisterShaderFromData(const Name: string; const Kind: TContextShaderKind;
      const OriginalSource: string; const Sources: array of TContextShaderSource): TContextShader;
    // Create shader from file and Register, return already registered if exists
    class function RegisterShaderFromFile(const FileName: string): TContextShader;
    // Unregister shader
    class procedure UnregisterShader(const Shader: TContextShader);
  end;

{ Texture }

  ITextureAccess = interface
  ['{3A41B87B-99E6-4DF7-BA7D-CAC558AD0D90}']
    procedure SetHandle(const AHandle: THandle);
    procedure SetTextureScale(const Scale: Single);
    property Handle: THandle write SetHandle;
    property TextureScale: Single write SetTextureScale;
  end;

  TTextureHandle = THandle;

  TTextureFilter = (Nearest, Linear);

  TTextureStyle = (MipMaps, Dynamic, RenderTarget, Volatile);

  TTextureStyles = set of TTextureStyle;

  TTexture = class(TInterfacedPersistent, ITextureAccess)
  private
    FWidth: Integer;
    FHeight: Integer;
    FPixelFormat: TPixelFormat;
    FHandle: TTextureHandle;
    FStyle: TTextureStyles;
    FMagFilter: TTextureFilter;
    FMinFilter: TTextureFilter;
    FTextureScale: Single;
    FRequireInitializeAfterLost: Boolean;
    FBits: Pointer;
    FContextLostId: TMessageSubscriptionId;
    FContextResetId: TMessageSubscriptionId;
    procedure ContextLostHandler(const Sender : TObject; const Msg : TMessage);
    procedure ContextResetHandler(const Sender : TObject; const Msg : TMessage);
    procedure SetPixelFormat(const Value: TPixelFormat);
    procedure SetStyle(const Value: TTextureStyles);
    function GetBytesPerPixel: Integer;
    procedure SetMagFilter(const Value: TTextureFilter);
    procedure SetMinFilter(const Value: TTextureFilter);
    procedure SetHeight(const Value: Integer);
    procedure SetWidth(const Value: Integer);
    { ITextureAccess }
    procedure SetHandle(const AHandle: THandle);
    procedure SetTextureScale(const Scale: Single);
  protected
  public
    constructor Create; virtual;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    procedure SetSize(const AWidth, AHeight: Integer);
    function IsEmpty: Boolean;
    { hardware }
    procedure Initialize;
    procedure Finalize;
    { access }
    procedure LoadFromStream(const Stream: TStream);
    procedure UpdateTexture(const Bits: Pointer; const Pitch: Integer);
    { properties }
    property BytesPerPixel: Integer read GetBytesPerPixel;
    property MinFilter: TTextureFilter read FMinFilter write SetMinFilter;
    property MagFilter: TTextureFilter read FMagFilter write SetMagFilter;
    property PixelFormat: TPixelFormat read FPixelFormat write SetPixelFormat;
    property TextureScale: Single read FTextureScale; // hi resolution mode
    property Style: TTextureStyles read FStyle write SetStyle;
    property Width: Integer read FWidth write SetWidth;
    property Height: Integer read FHeight write SetHeight;
    property Handle: TTextureHandle read FHandle;
  end;

  TTextureBitmap = class(TBitmap)
  private
    FTexture: TTexture;
    function GetTexture: TTexture;
  protected
    procedure DestroyResources; override;
    procedure BitmapChanged; override;
  public
    property Texture: TTexture read GetTexture;
  end;

{ Materials }

  TMaterial = class abstract
  public type
    TProperty = (ModelViewProjection, ModelView, ModelViewInverseTranspose);
  private
    FOnChange: TNotifyEvent;
    FModified: Boolean;
    FNotifyList: TList<Pointer>;
  protected
    procedure DoInitialize; virtual; abstract;
    procedure DoApply(const Context: TContext3D); virtual;
    procedure DoReset(const Context: TContext3D); virtual;
    procedure DoChange; virtual;
    class function DoGetMaterialProperty(const Prop: TMaterial.TProperty): string; virtual;
  public
    constructor Create; virtual;
    destructor Destroy; override;
    class function GetMaterialProperty(const Prop: TProperty): string;
    procedure Apply(const Context: TContext3D);
    procedure Reset(const Context: TContext3D);
    { FreeNotify }
    procedure AddFreeNotify(const AObject: IFreeNotification);
    procedure RemoveFreeNotify(const AObject: IFreeNotification);
    { Proeprties }
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    property Modified: Boolean read FModified;
  end;
  TMaterialClass = class of TMaterial;

{ Lights }

  TLightType = (Directional, Point, Spot);

  TLightDescription = record
    Enabled: Boolean;
    Color: TAlphaColor;
    LightType: TLightType;
    SpotCutOff: Single;
    SpotExponent: Single;
    Position: TPoint3D;
    Direction: TPoint3D;
    constructor Create(AEnabled: Boolean; AColor: TAlphaColor; ALightType: TLightType; ASpotCutOff: Single;
      ASpotExponent: Single; APosition: TPoint3D; ADirection: TPoint3D);
  end;

  TLightDescriptionList = TList<TLightDescription>;

{ Context's Messages }

  /// <summary>This message is sent when before TContextLostMessage message in order to save data.</summary>
  TContextBeforeLosingMessage = class(TMessage)
  end;

  /// <summary>Message that indicates that the rendering context has been
  /// lost.</summary>
  TContextLostMessage = class(TMessage)
  end;

  /// <summary>Message that indicates that a rendering context has been
  /// created.</summary>
  TContextResetMessage = class(TMessage)
  end;

  /// <summary>Message that indicates that the rendering context has been
  /// removed.</summary>
  TContextRemovedMessage = class(TMessage)
  end;

{ Context }

  TProjection = (Camera, Screen);

  TMultisample = (None, TwoSamples, FourSamples);

  TClearTarget = (Color, Depth, Stencil);

  TClearTargets = set of TClearTarget;

  TStencilOp = (Keep, Zero, Replace, Increase, Decrease, Invert);

  TStencilFunc = (Never, Less, Lequal, Greater, Gequal, Equal, NotEqual, Always);

  TContextState = (
    // 2D screen matrix
    cs2DScene,
    // 3D camera matrix
    cs3DScene,
    // Depth
    csZTestOn, csZTestOff,
    csZWriteOn, csZWriteOff,
    // Alpha Blending
    csAlphaBlendOn, csAlphaBlendOff,
    // Stencil
    csStencilOn, csStencilOff,
    // Color
    csColorWriteOn, csColorWriteOff,
    // Scissor
    csScissorOn, csScissorOff,
    // Faces
    csFrontFace, csBackFace, csAllFace
  );

  TPrimitivesKind = (Points, Lines, Triangles);

  IContextObject = interface
  ['{A78019E4-F09A-4F8D-AC43-E8D51FE3AD69}']
    function GetContext: TContext3D;
    property Context: TContext3D read GetContext;
  end;

  EContext3DException = class(Exception);

  TContextStyle = (RenderTargetFlipped, Fragile);
  TContextStyles = set of TContextStyle;

  TContext3D = class abstract(TInterfacedPersistent, IFreeNotification)
  public type
    TIndexBufferSupport = (Unknown, Int16, Int32);
  protected const
    DefaultMaxLightCount = 8;
    DefaultTextureUnitCount = 8;
    DefaultScale = 1;
    MaxInt16Vertices = 65536;
    MaxInt16Indices = 65536;
  private type
    TStatesArray = array [TContextState] of Boolean;
    TContextStates = record
      States: TStatesArray;
      Matrix: TMatrix3D;
      Context: TContext3D;
      ScissorRect: TRect;
    end;
  private class var
    FContextCount: Integer;
    FSaveStates: TList<TContextStates>;
    FGlobalBeginSceneCount: Integer;
    FChangeStateCount: Integer;
    FChangeShaderCount: Integer;
    FFPS, FRenderTime, FBeginTime, FEndTime: Double;
    FTimerService: IFMXTimerService;
    FFrameCount: Integer;
    FCurrentContext: TContext3D;
    FCurrentStates: TStatesArray;
    FCurrentVertexShader: TContextShader;
    FCurrentPixelShader: TContextShader;
    FCurrentOpacity: Single;
    FCurrentMaterial: TMaterial;
    FCurrentMaterialClass: TMaterialClass;
    FCurrentFormat: TVertexFormats;
    FCurrentScissorRect: TRect;
  private
    FBeginSceneCount: Integer;
    FRecalcScreenMatrix, FRecalcProjectionMatrix: Boolean;
    FScreenMatrix, FProjectionMatrix: TMatrix3D;
    FInvScreenMatrix, FInvProjectionMatrix: TMatrix3D;
    FCenterOffset: TPosition;
    FParent: TWindowHandle;
    FWidth, FHeight: Integer;
    FScale: Single;
    FTexture: TTexture;
    FLights: TLightDescriptionList;
    { style }
    FMultisample: TMultisample;
    FDepthStencil: Boolean;
    { camera }
    FCurrentMatrix: TMatrix3D;
    FCurrentCameraMatrix: TMatrix3D;
    FCurrentCameraInvMatrix: TMatrix3D;
    FCurrentAngleOfView: Single;
    { materials }
    FDefaultMaterial: TMaterial;
    { renderto }
    FRenderToMatrix: TMatrix3D;
    function GetCurrentState(AIndex: TContextState): Boolean;
    function GetProjectionMatrix: TMatrix3D;
    function GetScreenMatrix: TMatrix3D;
    procedure ApplyMaterial(const Material: TMaterial);
    procedure ResetMaterial(const Material: TMaterial);
    function GetCurrentModelViewProjectionMatrix: TMatrix3D;
    procedure DrawPrimitivesMultiBatch(const AKind: TPrimitivesKind; const Vertices, Indices: Pointer;
      const VertexDeclaration: TVertexDeclaration; const VertexSize, VertexCount, IndexSize, IndexCount: Integer);
  protected
    procedure AssignTo(Dest: TPersistent); override;
    { buffer }
    procedure DoFreeBuffer; virtual; abstract;
    procedure DoResize; virtual; abstract;
    procedure DoCreateBuffer; virtual; abstract;
    procedure DoCopyToBitmap(const Dest: TBitmap; const ARect: TRect); virtual;
    procedure DoCopyToBits(const Bits: Pointer; const Pitch: Integer; const ARect: TRect); virtual; abstract;
    { rendering }
    /// <summary>Used to initialize Scale property</summary>
    function GetContextScale: Single; virtual;
    function DoBeginScene: Boolean; virtual;
    procedure DoEndScene; virtual;
    procedure DoClear(const ATarget: TClearTargets; const AColor: TAlphaColor; const ADepth: single; const AStencil: Cardinal); virtual; abstract;
    { states }
    procedure DoSetContextState(AState: TContextState); virtual; abstract;
    procedure DoSetStencilOp(const Fail, ZFail, ZPass: TStencilOp); virtual; abstract;
    procedure DoSetStencilFunc(const Func: TStencilfunc; Ref, Mask: Cardinal); virtual; abstract;
    { scissor }
    procedure DoSetScissorRect(const ScissorRect: TRect); virtual; abstract;
    { drawing }
    /// <summary> Provides a mechanism to draw the specified batch of primitives on currently selected hardware-accelerated
    /// layer. This method may support only a limited number of vertices and/or primitives. It may be called multiple
    /// times by DoDrawPrimitives to render larger buffers. </summary>
    procedure DoDrawPrimitivesBatch(const AKind: TPrimitivesKind; const Vertices, Indices: Pointer;
      const VertexDeclaration: TVertexDeclaration; const VertexSize, VertexCount, IndexSize,
      IndexCount: Integer); virtual; abstract;
    /// <summary> This either provides a mechanism to draw the specified primitives (without any limitations) either
    /// directly in hardware or by dividing the buffers in batches and then calling DoDrawPrimitivesBatch to render
    /// each individual batch. </summary>
    procedure DoDrawPrimitives(const AKind: TPrimitivesKind; const Vertices, Indices: Pointer;
      const VertexDeclaration: TVertexDeclaration; const VertexSize, VertexCount, IndexSize,
      IndexCount: Integer); virtual;
    { texture }
    class procedure DoInitializeTexture(const Texture: TTexture); virtual; abstract;
    class procedure DoFinalizeTexture(const Texture: TTexture); virtual; abstract;
    class procedure DoUpdateTexture(const Texture: TTexture; const Bits: Pointer; const Pitch: Integer); virtual; abstract;
    { bitmap }
    class function DoBitmapToTexture(const Bitmap: TBitmap): TTexture; virtual;
    { shaders }
    class procedure DoInitializeShader(const Shader: TContextShader); virtual; abstract;
    class procedure DoFinalizeShader(const Shader: TContextShader); virtual; abstract;
    procedure DoSetShaders(const VertexShader, PixelShader: TContextShader); virtual; abstract;
    procedure DoSetShaderVariable(const Name: string; const Data: array of TVector3D); overload; virtual; abstract;
    procedure DoSetShaderVariable(const Name: string; const Texture: TTexture); overload; virtual; abstract;
    procedure DoSetShaderVariable(const Name: string; const Matrix: TMatrix3D); overload; virtual; abstract;
    { IFreeNotification }
    procedure FreeNotification(AObject: TObject); virtual;
    { constructors }
    constructor CreateFromWindow(const AParent: TWindowHandle; const AWidth, AHeight: Integer;
      const AMultisample: TMultisample; const ADepthStencil: Boolean); virtual;
    constructor CreateFromTexture(const ATexture: TTexture; const AMultisample: TMultisample;
      const ADepthStencil: Boolean); virtual;
    procedure InitContext; virtual;
    /// <summary> Returns supported limit in index buffers on currently selected hardware-accelerated layer. </summary>
    function GetIndexBufferSupport: TIndexBufferSupport; virtual;
  public
    destructor Destroy; override;
    procedure SetSize(const AWidth, AHeight: Integer);
    procedure SetMultisample(const Multisample: TMultisample);
    procedure SetStateFromContext(const AContext: TContext3D);
    class procedure ResetStates; static;
    property BeginSceneCount: Integer read FBeginSceneCount;
    class property GlobalBeginSceneCount: Integer read FGlobalBeginSceneCount;
    { render to }
    procedure SetRenderToMatrix(const Matrix: TMatrix3D);
    { buffer }
    procedure FreeBuffer;
    procedure Resize;
    procedure CreateBuffer;
    procedure CopyToBitmap(const Dest: TBitmap; const ARect: TRect);
    procedure CopyToBits(const Bits: Pointer; const Pitch: Integer; const ARect: TRect);
    { rendering }
    function BeginScene: Boolean;
    procedure EndScene;
    procedure Clear(const AColor: TAlphaColor); overload;
    procedure Clear(const ATarget: TClearTargets; const AColor: TAlphaColor; const ADepth: single; const AStencil: Cardinal); overload;
    { matrix }
    procedure SetMatrix(const M: TMatrix3D);
    procedure SetCameraMatrix(const M: TMatrix3D);
    procedure SetCameraAngleOfView(const Angle: Single);
    { states }
    procedure PushContextStates;
    procedure PopContextStates;
    procedure SetContextState(const State: TContextState);
    procedure SetStencilOp(const Fail, ZFail, ZPass: TStencilOp);
    procedure SetStencilFunc(const Func: TStencilfunc; Ref, Mask: Cardinal);
    procedure SetScissorRect(const ScissorRect: TRect);
    { drawing }
    procedure DrawTriangles(const Vertices: TVertexBuffer; const Indices: TIndexBuffer;
      const Material: TMaterial; const Opacity: Single);
    procedure DrawLines(const Vertices: TVertexBuffer; const Indices: TIndexBuffer; const Material: TMaterial; const Opacity: Single);
    procedure DrawPoints(const Vertices: TVertexBuffer; const Indices: TIndexBuffer; const Material: TMaterial; const Opacity: Single);
    procedure DrawPrimitives(const AKind: TPrimitivesKind; const Vertices, Indices: Pointer;
      const VertexDeclaration: TVertexDeclaration; const VertexSize, VertexCount, IndexSize, IndexCount: Integer;
      const Material: TMaterial; const Opacity: Single);
    procedure FillRect(const TopLeft, BottomRight: TPoint3D; const Opacity: Single; const Color: TAlphaColor);
    procedure FillCube(const Center, Size: TPoint3D; const Opacity: Single; const Color: TAlphaColor);
    procedure DrawLine(const StartPoint, EndPoint: TPoint3D; const Opacity: Single; const Color: TAlphaColor);
    procedure DrawRect(const TopLeft, BottomRight: TPoint3D; const Opacity: Single; const Color: TAlphaColor);
    procedure DrawCube(const Center, Size: TPoint3D; const Opacity: Single; const Color: TAlphaColor);
    procedure FillPolygon(const Center, Size: TPoint3D; const Rect: TRectF; const Points: TPolygon;
      const Material: TMaterial; const Opacity: Single; Front: Boolean = True; Back: Boolean = True;
      Left: Boolean = True);
    { textures }
    class procedure InitializeTexture(const Texture: TTexture);
    class procedure FinalizeTexture(const Texture: TTexture);
    class procedure UpdateTexture(const Texture: TTexture; const Bits: Pointer; const Pitch: Integer);
    { bitmap }
    class function BitmapToTexture(const Bitmap: TBitmap): TTexture;
    { shaders }
    class procedure InitializeShader(const Shader: TContextShader);
    class procedure FinalizeShader(const Shader: TContextShader);
    procedure SetShaders(const VertexShader, PixelShader: TContextShader);
    procedure SetShaderVariable(const Name: string; const Data: array of TVector3D); overload;
    procedure SetShaderVariable(const Name: string; const Texture: TTexture); overload;
    procedure SetShaderVariable(const Name: string; const Matrix: TMatrix3D); overload;
    procedure SetShaderVariable(const Name: string; const Color: TAlphaColor); overload;
    { pick }
    procedure Pick(X, Y: Single; const AProj: TProjection; var RayPos, RayDir: TVector3D);
    function WorldToScreen(const AProj: TProjection; const P: TPoint3D): TPoint3D;
    { states }
    property CurrentModelViewProjectionMatrix: TMatrix3D read GetCurrentModelViewProjectionMatrix;
    property CurrentMatrix: TMatrix3D read FCurrentMatrix;
    property CurrentCameraMatrix: TMatrix3D read FCurrentCameraMatrix;
    property CurrentCameraInvMatrix: TMatrix3D read FCurrentCameraInvMatrix;
    property CurrentProjectionMatrix: TMatrix3D read GetProjectionMatrix;
    property CurrentScreenMatrix: TMatrix3D read GetScreenMatrix;
    property CurrentStates[AIndex: TContextState]: Boolean read GetCurrentState;
    class property CurrentContext: TContext3D read FCurrentContext;
    class property CurrentOpacity: Single read FCurrentOpacity;
    class property CurrentVertexShader: TContextShader read FCurrentVertexShader;
    class property CurrentPixelShader: TContextShader read FCurrentPixelShader;
    class property CurrentScissorRect: TRect read FCurrentScissorRect;
    { lights }
    property Lights: TLightDescriptionList read FLights;
    { caps }
    class function Style: TContextStyles; virtual;
    class function MaxLightCount: Integer; virtual;
    class function MaxTextureSize: Integer; virtual; abstract;
    class function TextureUnitCount: Integer; virtual;
    class function PixelFormat: TPixelFormat; virtual; abstract;
    class function PixelToPixelPolygonOffset: TPointF; virtual;
    { statistic }
    class property FPS: Double read FFPS;
    class property ChangeStateCount: Integer read FChangeStateCount;
    class property ChangeShaderCount: Integer read FChangeStateCount;
    { materials }
    property DefaultMaterial: TMaterial read FDefaultMaterial;
    { properties }
    property CenterOffset: TPosition read FCenterOffset;
    property Height: Integer read FHeight;
    property Width: Integer read FWidth;
    /// <summary>Scale factor of context depends on real resolution of context. It gets from Texture.TextureScale or TWindowHandle.Scale.</summary>
    property Scale: Single read FScale;
    property Texture: TTexture read FTexture;
    property DepthStencil: Boolean read FDepthStencil;
    property Multisample: TMultisample read FMultisample;
    /// <summary> Indicates supported limit in index buffers on currently selected hardware-accelerated layer. </summary>
    property IndexBufferSupport: TIndexBufferSupport read GetIndexBufferSupport;
    { Is this a valid/active context? }
    class function Valid: Boolean; virtual; abstract;
    { Window handle }
    property Parent: TWindowHandle read FParent;
  end;

  TContextClass = class of TContext3D;

  EContextManagerException = class(Exception);

  TContextManager = class sealed
  private type
    TContextClassRec = record
      ContextClass: TContextClass;
      Default: Boolean;
    end;
  strict private
    class var FContextList: TList<TContextClassRec>;
    class var FDefaultContextClass: TContextClass;
  private
    class function GetDefaultContextClass: TContextClass; static;
    class function GetContextCount: Integer; static;
  public
    // Reserved for internal use only - do not call directly!
    class procedure UnInitialize;
    // Register a rendering Canvas class
    class procedure RegisterContext(const ContextClass: TContextClass; const ADefault: Boolean);
    class property ContextCount: Integer read GetContextCount;
    // Return default context class
    class property DefaultContextClass: TContextClass read GetDefaultContextClass;
    // Helper for shaders
    class procedure InitializeShader(const Shader: TContextShader);
    class procedure FinalizeShader(const Shader: TContextShader);
    // Creation
    class function CreateFromWindow(const AParent: TWindowHandle; const AWidth, AHeight: Integer;
      const AMultisample: TMultisample; const ADepthStencil: Boolean): TContext3D;
    class function CreateFromTexture(const ATexture: TTexture; const AMultisample: TMultisample;
      const ADepthStencil: Boolean): TContext3D;
  end;

{ TPosition3D }

  TPosition3D = class(TPersistent)
  private
    FOnChange: TNotifyEvent;
    FY: Single;
    FX: Single;
    FZ: Single;
    FDefaultValue: TPoint3D;
    FOnChangeY: TNotifyEvent;
    FOnChangeX: TNotifyEvent;
    FOnChangeZ: TNotifyEvent;
    procedure SetPoint3D(const Value: TPoint3D);
    procedure SetX(const Value: Single);
    procedure SetY(const Value: Single);
    procedure SetZ(const Value: Single);
    function GetPoint3D: TPoint3D;
    function GetVector: TVector3D;
    procedure SetVector(const Value: TVector3D);
    function IsXStored: Boolean;
    function IsYStored: Boolean;
    function IsZStored: Boolean;
  protected
    procedure DefineProperties(Filer: TFiler); override;
    procedure ReadPoint(Reader: TReader);
    procedure WritePoint(Writer: TWriter);
  public
    constructor Create(const ADefaultValue: TPoint3D); virtual;
    procedure Assign(Source: TPersistent); override;
    procedure SetPoint3DNoChange(const P: TPoint3D);
    procedure SetVectorNoChange(const P: TVector3D);
    function Empty: Boolean;
    property Point: TPoint3D read GetPoint3D write SetPoint3D;
    property Vector: TVector3D read GetVector write SetVector;
    property DefaultValue: TPoint3D read FDefaultValue write FDefaultValue;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    property OnChangeX: TNotifyEvent read FOnChangeX write FOnChangeX;
    property OnChangeY: TNotifyEvent read FOnChangeY write FOnChangeY;
    property OnChangeZ: TNotifyEvent read FOnChangeZ write FOnChangeZ;
  published
    property X: Single read FX write SetX stored IsXStored nodefault;
    property Y: Single read FY write SetY stored IsYStored nodefault;
    property Z: Single read FZ write SetZ stored IsZStored nodefault;
  end;

{ Utils }
function VertexSize(const AFormat: TVertexFormats): Integer;
function GetVertexOffset(const APosition: TVertexFormat; const AFormat: TVertexFormats): Integer;

{ Intersection }

function RayCastPlaneIntersect(const RayPos, RayDir, PlanePoint, PlaneNormal: TPoint3D;
  var Intersection: TPoint3D): Boolean;

function RayCastSphereIntersect(const RayPos, RayDir, SphereCenter: TPoint3D; const SphereRadius: Single;
  var IntersectionNear, IntersectionFar: TPoint3D): Integer;

function RayCastEllipsoidIntersect(const RayPos, RayDir, EllipsoidCenter: TPoint3D; const XRadius, YRadius,
  ZRadius: Single; var IntersectionNear, IntersectionFar: TPoint3D): Integer;

function RayCastCuboidIntersect(const RayPos, RayDir, CuboidCenter: TPoint3D; const Width, Height, Depth: Single;
  var IntersectionNear, IntersectionFar: TPoint3D): Integer;

function RayCastTriangleIntersect(const RayPos, RayDir: TPoint3D; const Vertex1, Vertex2, Vertex3: TPoint3D;
  var Intersection: TPoint3D): Boolean;

function WideGetToken(var Pos: Integer; const S: string; const Separators: string; const Stop: string = ''): string;

//== INTERFACE END: FMX.Types3D
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.TextLayout (from FMX.TextLayout.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  TTextRange = record
    Pos: Integer;
    Length: Integer;
    constructor Create(APos, ALength: Integer);
    function InRange(const AIndex: Integer): Boolean;
  end;

  TTextAttribute = record
  public
    Font: TFont;
    Color: TAlphaColor;
                                 

    constructor Create(const AFont: TFont; const AColor : TAlphaColor); overload;
    constructor Create(const AExisting: TTextAttribute; const ANewFont: TFont); overload;
    constructor Create(const AExisting: TTextAttribute; const ANewColor: TAlphaColor); overload;
  end;

  TTextAttributedRange = class
  public
    Range: TTextRange;
    Attribute: TTextAttribute;

    constructor Create(const ARange: TTextRange; const AAttribute : TTextAttribute);
    destructor Destroy; override;
  end;

  TTextLayout = class abstract
  public const
    ///<summary>Maximum size for TTextLayout</summary>
    MaxLayoutSize: TPointF = (X: $FFFF; Y: $FFFF);
  private
    FAttributes: TList<TTextAttributedRange>;
    FFont: TFont;
    FColor: TAlphaColor;
    FText: string;
    FWordWrap : Boolean;
    FHorizontalAlign: TTextAlign;
    FVerticalAlign: TTextAlign;
    FPadding: TBounds;
    FNeedUpdate: Boolean;
    FMaxSize: TPointF;
    FTopLeft: TPointF;
    FUpdating: Integer;
    FOpacity: Single;
    FTrimming: TTextTrimming;
    FRightToLeft: Boolean;
    [weak] FCanvas: TCanvas;
    FMessageId: TMessageSubscriptionId;
    procedure SetMaxSize(const Value: TPointF);
    procedure AttributesChanged(Sender: TObject; const Item: TTextAttributedRange; Action: TCollectionNotification);
    procedure ChangedHandler(Sender: TObject);
    function GetAttribute(const Index: Integer): TTextAttributedRange;
    function GetAttributesCount: Integer;
    procedure SetHorizontalAlign(const Value: TTextAlign);
    procedure SetFont(const Value: TFont);
    procedure SetPadding(const Value: TBounds);
    procedure SetText(const Value: string);
    procedure SetWordWrap(const Value: Boolean);
    function GetHeight: Single;
    function GetWidth: Single;
    function GetSize: TSizeF;
    procedure NeedUpdate;
    procedure SetVerticalAlign(const Value: TTextAlign);
    procedure SetTrimming(const Value: TTextTrimming);
    procedure SetRightToLeft(const Value: Boolean);
    procedure SetCanvas(const Value: TCanvas);
    procedure SetColor(const Value: TAlphaColor);
    { Handler }
    procedure CanvasDestroyListener(const Sender : TObject; const M : TMessage);
  protected
    procedure DoRenderLayout; virtual; abstract;
    procedure DoDrawLayout(const ACanvas: TCanvas); virtual; abstract;
    procedure DoColorChanaged; virtual;
    function GetTextHeight: Single; virtual; abstract;
    function GetTextWidth: Single; virtual; abstract;
    function GetTextRect: TRectF; virtual; abstract;
    //Get character position from it's coordinates
    function DoPositionAtPoint(const APoint: TPointF): Integer; virtual; abstract;
    //Get region for text range
    function DoRegionForRange(const ARange: TTextRange): TRegion; virtual; abstract;
    ///<summary>Setting internal flag that informs that layout properties were changed
    ///and layout should be recalculated</summary>
    procedure SetNeedUpdate;
  public
    constructor Create(const ACanvas: TCanvas = nil); virtual;
    destructor Destroy; override;

    //Attributes
    procedure AddAttribute(const ARange: TTextRange; const AAttribute : TTextAttribute); overload;
    procedure AddAttribute(const AAttributeRange: TTextAttributedRange); overload;
    procedure DeleteAttribute(const AIndex: Integer);
    procedure DeleteAttributeRange(const AFromIndex, AToIndex: Integer);
    procedure ClearAttributes;

    //Render layout with desired opacity
    procedure RenderLayout(const ACanvas: TCanvas);

    //Convert layout to TPathData
    procedure ConvertToPath(const APath: TPathData); virtual; abstract;
    //Get character position from it's coordinates
    function PositionAtPoint(const APoint: TPointF; const RoundToWord: Boolean = False): Integer;
    //Get region for text range
    function RegionForRange(const ARange: TTextRange; const RoundToWord: Boolean = False): TRegion;

    //Restrict frequently updates
    procedure BeginUpdate;
    procedure EndUpdate;

    property LayoutCanvas: TCanvas read FCanvas write SetCanvas;

    ///  <summary>
    ///  List of layout attributes
    ///  </summary>
    property Attributes[const Index: Integer]: TTextAttributedRange read GetAttribute;
    ///  <summary>
    ///  Count of layout attributes
    ///  </summary>
    property AttributesCount: Integer read GetAttributesCount;
    ///  <summary>
    ///  Layout text
    ///  </summary>
    property Text: string read FText write SetText;
    property Padding: TBounds read FPadding write SetPadding;
    property WordWrap: Boolean read FWordWrap write SetWordWrap;
    property HorizontalAlign: TTextAlign read FHorizontalAlign write SetHorizontalAlign;
    property VerticalAlign: TTextAlign read FVerticalAlign write SetVerticalAlign;
    property Color: TAlphaColor read FColor write SetColor default TAlphaColorRec.Black;
    property Font: TFont read FFont write SetFont;
    property Opacity: Single read FOpacity write FOpacity;
    ///  <summary>
    ///  Text trimmin options
    ///  </summary>
    property Trimming: TTextTrimming read FTrimming write SetTrimming;
    ///  <summary>
    ///  Layout size limits
    ///  </summary>
    property RightToLeft: Boolean read FRightToLeft write SetRightToLeft;
    /// <summary>Returns calculated layout size.</summary>
    property Size: TSizeF read GetSize;
    property MaxSize: TPointF read FMaxSize write SetMaxSize;
    ///  <summary>
    ///  Coordinates of top-left layout corner.
    ///  </summary>
    ///  <remarks>
    ///  Use this property to change layout position on canvas, which by
    ///  default is (0;0)
    ///  </remarks>
    property TopLeft: TPointF read FTopLeft write FTopLeft;
    //Real size of layout
    property Height: Single read GetHeight;
    property Width: Single read GetWidth;
    //Text size only
    property TextHeight: Single read GetTextHeight;
    property TextWidth: Single read GetTextWidth;
    property TextRect: TRectF read GetTextRect;
  end;

  /// <summary>Class for exceptions related to the FMX.TextLayout
  /// unit.</summary>
  ETextLayoutException = class(Exception);

  TTextLayoutClass = class of TTextLayout;

  ETextLayoutManagerException = class(Exception);

  TTextLayoutManager = class sealed
  private type
    TTextLayoutRecord = record
      LayoutClass: TTextLayoutClass;
      CanvasClass: TCanvasClass;
    end;
  strict private
    class var FLayoutList: TList<TTextLayoutRecord>;
    class var FDefaultLayoutClass: TTextLayoutClass;
  private
    class function GetDefaultLayout: TTextLayoutClass; static;
  public
    // Reserved for internal use only - do not call directly!
    class procedure UnInitialize;
    // Register a rendering Text Layout class
    class procedure RegisterTextLayout(const LayoutClass: TTextLayoutClass; const CanvasClass: TCanvasClass);
    // Return default Text Layout
    class property DefaultTextLayout: TTextLayoutClass read GetDefaultLayout;
    // Return Text Layout by type of Canvas
    class function TextLayoutByCanvas(const ACanvasClass: TClass): TTextLayoutClass;
    // Class static method for C++ access
    class function TextLayoutForClass(C: TTextLayoutClass): TTextLayout; static;
  end;

function IsPointInRect(const APoint: TPointF; const ARect: TRectF): Boolean;

//== INTERFACE END: FMX.TextLayout
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Filter (from FMX.Filter.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
{ IFilterCacheLayer }

  IFilterCacheLayer = interface
    ['{49EEF76F-3BD6-4688-994F-DC1B55002DEA}']
    /// <summary>Force refresh cache on next use.</summary>
    procedure SetNeedUpdate;
  end;

{ TBitmapCacheLayer }

  IBitmapCacheLayer = interface(IFilterCacheLayer)
    ['{C321CAF5-994B-4B64-9E99-8903B7B6A67D}']
    /// <summary>Attempts to initiate the draw cache update, rendering the cache image on the target.</summary>
    /// <returns>True when cache modification is required and False when the current cache could be drawn to the target without updating.</returns>
    function BeginUpdate(const ATarget: TCanvas; const ADestRect: TRectF; const AOpacity: Single;
      const AHighSpeed: Boolean; out ACacheCanvas: TCanvas): Boolean;
    /// <summary>Concludes the cache update rendering the result onto the target.</summary>
    /// <param name="AGeneratedBitmap">Allows to change the generated cache image before storing it.</param>
    procedure EndUpdate(const AGeneratedBitmap: TProc<TBitmap> = nil);
  end;

  TBitmapCacheLayer = class(TInterfacedObject, IBitmapCacheLayer)
  private
    FBitmap: TBitmap;
    FNeedUpdate: Boolean;
    FSavedDestRect: TRectF;
    FSavedHighSpeed: Boolean;
    FSavedOpacity: Single;
    FSavedTarget: TCanvas;
  public
    destructor Destroy; override;
    /// <summary>Attempts to initiate the draw cache update, rendering the cache image on the target.</summary>
    /// <returns>True when cache modification is required and False when the current cache could be drawn to the target without updating.</returns>
    function BeginUpdate(const ATarget: TCanvas; const ADestRect: TRectF; const AOpacity: Single;
      const AHighSpeed: Boolean; out ACacheCanvas: TCanvas): Boolean;
    /// <summary>Concludes the cache update rendering the result onto the target.</summary>
    /// <param name="AGeneratedBitmap">Allows to change the generated cache image before storing it.</param>
    procedure EndUpdate(const AGeneratedBitmap: TProc<TBitmap> = nil);
    /// <summary>Force refresh cache on next use.</summary>
    procedure SetNeedUpdate;
  end;

{ TFilter }

  TFilterClass = class of TFilter;
  TFilterContext = class;
  TFilterContextClass = class of TFilterContext;
  TFilterValueType = (Float, Point, Color, Bitmap);
  TFilterImageType = (Undefined, Bitmap, Texture);

  PFilterValueRec = ^TFilterValueRec;
  TFilterValueRec = record
    Name: string;
    Desc: string;
    ValueType: TFilterValueType;
    Value: TValue;
    Min, Max, Default: TValue;
    Bitmap: TBitmap;
    constructor Create(const AName, ADesc: string; AType: TFilterValueType; const ADefault, AMin, AMax: TValue); overload;
    constructor Create(const AName, ADesc: string; AType: TFilterValueType); overload;
    constructor Create(const AName, ADesc: string; ADefault: TAlphaColor); overload;
    constructor Create(const AName, ADesc: string; ADefault, AMin, AMax: Single); overload;
    constructor Create(const AName, ADesc: string; const ADefault, AMin, AMax: TPointF); overload;
  end;

  TFilterValueRecArray = array of TFilterValueRec;

  TFilterRec = record
    Name: string;
    Desc: string;
    Values: TFilterValueRecArray;
    constructor Create(const AName, ADesc: string; const AValues: TFilterValueRecArray); overload;
  end;

  TFilter = class(TPersistent)
  private class var
    FDefaultVertexShader: TContextShader;
    FProcessingFilter: TFilter;
  private
    FCacheLayer: IFilterCacheLayer;
    FFilterContext: TFilterContext;
    FInputFilter: TFilter;
    FInputLayerSize: TSize;
    FInputSize: TSize;
    FKeepCurrentContext: Boolean;
    FModified: Boolean;
    FNotifierList: TList<TFilter>;
    FOutputSize: TSize;
    FRecalcInputSize: Boolean;
    FRecalcOutputSize: Boolean;
    FRootInputFilter: TFilter;
    FValues: TFilterValueRecArray;
    procedure AddChangeNotifier(const ATargetFilter: TFilter);
    function GetBestFilterContext(const AOutputType: TFilterImageType; const AOutputCanvasClass: TCanvasClass): TFilterContextClass;
    function GetFilterValue(const AName: string): TValue;
    function GetFilterValuesAsBitmap(const AName: string): TBitmap;
    function GetFilterValuesAsColor(const AName: string): TAlphaColor;
    function GetFilterValuesAsFloat(const AName: string): Single;
    function GetFilterValuesAsPoint(const AName: string): TPointF;
    function GetFilterValuesAsTexture(const AName: string): TTexture;
    function GetOutputSize: TSize;
    procedure RemoveChangeNotifier(const ATargetFilter: TFilter);
    procedure SetFilterContextClass(const AContextClass: TFilterContextClass);
    procedure SetFilterValue(const AName: string; const AValue: TValue);
    procedure SetFilterValuesAsBitmap(const AName: string; const AValue: TBitmap);
    procedure SetFilterValuesAsColor(const AName: string; const AValue: TAlphaColor);
    procedure SetFilterValuesAsFloat(const AName: string; const AValue: Single);
    procedure SetFilterValuesAsPoint(const AName: string; const AValue: TPointF);
    procedure SetFilterValuesAsTexture(const AName: string; const AValue: TTexture);
    procedure SetInputAsFilter(const AValue: TFilter);
    procedure SetInputLayerSize(const AValue: TSize);
    function GetInputSize: TSize;
    property KeepCurrentContext: Boolean read FKeepCurrentContext write FKeepCurrentContext;
    property RootInputFilter: TFilter read FRootInputFilter;
    property Values[const Name: string]: TValue read GetFilterValue write SetFilterValue; default;
  protected
    FAntiAliasing: Boolean;
    FNeedInternalSecondTex: string;
    FPass: Integer;
    FPassCount: Integer;
    FShaders: array of TContextShader;
    FVertexShader: TContextShader;
    procedure CalcSize(var W, H: Integer); virtual;
    procedure Changed;
    procedure FilterDestroying(const AFilter: TFilter);
    procedure InputChanged;
    procedure LoadShaders; virtual;
    procedure LoadTextures; virtual;
  public
    constructor Create; virtual;
    destructor Destroy; override;
    procedure Apply; virtual;
    procedure ApplyWithoutCopyToOutput;
    /// <summary>Attempt to initiate a layer to apply the filter directly to the canvas drawings from that point on, until the EndLayer is called.</summary>
    function BeginLayer(const ATarget: TCanvas; const ADestRect: TRectF; const AOpacity: Single;
      const AHighSpeed: Boolean; var ACacheLayer: IFilterCacheLayer; out ACacheCanvas: TCanvas): Boolean;
    /// <summary>End the drawings in the direct filter layer, merging the result into the original canvas.</summary>
    procedure EndLayer;
    function CalcOutputSize(const AInputSize: TSize): TSize;
    class function FilterAttr: TFilterRec; virtual;
    { Class static method for C++ access }
    class function FilterAttrForClass(C: TFilterClass): TFilterRec; static;
    property FilterContext: TFilterContext read FFilterContext;
    property InputFilter: TFilter read FInputFilter write SetInputAsFilter;
    property InputSize: TSize read GetInputSize;
    property OutputSize: TSize read GetOutputSize;
    property ValuesAsBitmap[const Name: string]: TBitmap read GetFilterValuesAsBitmap write SetFilterValuesAsBitmap;
    property ValuesAsColor[const Name: string]: TAlphaColor read GetFilterValuesAsColor write SetFilterValuesAsColor;
    property ValuesAsFloat[const Name: string]: Single read GetFilterValuesAsFloat write SetFilterValuesAsFloat;
    property ValuesAsPoint[const Name: string]: TPointF read GetFilterValuesAsPoint write SetFilterValuesAsPoint;
    property ValuesAsTexture[const Name: string]: TTexture read GetFilterValuesAsTexture write SetFilterValuesAsTexture;
  end;

{ TFilterManager }

  TFilterManager = class sealed
  private type
    TFilterCategoryDict = TDictionary<TFilterClass, string>;
    TFilterClassDict = TDictionary<string, TFilterClass>;
    TFilterContextClassDict = TDictionary<TCanvasClass, TFilterContextClass>;
  private class var
    FDefaultFilterContextClass: TFilterContextClass;
    FFilterList: TFilterClassDict;
    FFilterCategoryList: TFilterCategoryDict;
    FFilterContextDic: TFilterContextClassDict;
    class function GetBestFilterContext(AVertexShader: TContextShader; const AShaders: array of TContextShader; AShadersCount: Integer;
      AInputCanvasClass, AOutputCanvasClass: TCanvasClass; AInputValue, AOutputValue: TFilterImageType): TFilterContextClass;
  public
    /// <summary>Write the filter categories in a list</summary>
    class procedure FillCategory(AList: TStrings);
    /// <summary>Write the filters of a category in a list</summary>
    class procedure FillFiltersInCategory(const ACategory: string; AList: TStrings);
    /// <summary>Get a new filter instance by the filter name</summary>
    class function FilterByName(const AName: string): TFilter;
    /// <summary>Get the filter class by it's name</summary>
    class function FilterClassByName(const AName: string): TFilterClass;
    /// <summary>Register new filter class.</summary>
    class procedure RegisterFilter(const ACategory: string; AFilter: TFilterClass);
    /// <summary>Register new filter context for a specific canvas.</summary>
    class procedure RegisterFilterContextForCanvas(const AContextClass: TFilterContextClass; const ACanvasClass: TCanvasClass);
    /// <summary>Reserved for internal use only - do not call directly!</summary>
    class procedure UnInitialize;
    /// <summary>Unregister a filter class.</summary>
    class procedure UnregisterFilter(AFilter: TFilterClass);
    class function FilterContext: TFilterContext; static; deprecated 'use TFilter.FilterContext instead';
    class function FilterTexture: TTexture; static; deprecated 'use TFilter.ValuesAsTexture[''Output''] instead';
  end;

{ TFilterContext }

  TFilterContext = class abstract
  private
    FFilter: TFilter;
    FNoCopyForOutput: Boolean;
  protected
    procedure Apply(var APass: Integer; const AAntiAliasing: Boolean; APassCount: Integer; const ASecondImageResourceName: string); virtual; abstract;
    function BeginLayer(const ATarget: TCanvas; const ADestRect: TRectF; const AOpacity: Single;
      const AHighSpeed: Boolean; var ACacheLayer: IFilterCacheLayer; out ACacheCanvas: TCanvas): Boolean; virtual;
    procedure Changed(const AValue: TFilterValueRec); virtual; abstract;
    procedure EnableBitmapOutput; virtual;
    procedure EndLayer(const ACacheLayer: IFilterCacheLayer); virtual;
    procedure LoadShaders; virtual;
    procedure LoadTextures; virtual;
    function OutputAsBitmap: TBitmap; virtual; abstract;
    function OutputAsTexture: TTexture; virtual; abstract;
    procedure SetRootInputLayerSize(const ASize: TSize);
    class function SupportsShaders(AVertexShader: TContextShader; const AShaders: array of TContextShader; AShadersCount: Integer): Boolean; virtual;
    property Filter: TFilter read FFilter;
    property NoCopyForOutput: Boolean read FNoCopyForOutput write FNoCopyForOutput;
  public
    constructor Create(const AFilter: TFilter; const AValue: TFilterValueRecArray); virtual;
    class function Style: TContextStyles; virtual;
    /// <summary>Reserved for internal use only - do not call directly!</summary>
    class procedure UnInitialize; virtual; abstract;
    procedure CopyToBitmap(const ADest: TBitmap; const ARect: TRect); virtual; abstract;
    procedure SetInputToShaderVariable(const AName: string); virtual; abstract;
    procedure SetShaders(const AVertexShader, APixelShader: TContextShader); virtual; abstract;
    procedure SetShaderVariable(const AName: string; const AData: array of TVector3D); overload; virtual; abstract;
    procedure SetShaderVariable(const AName: string; const ATexture: TTexture); overload; virtual; abstract;
    procedure SetShaderVariable(const AName: string; const AMatrix: TMatrix3D); overload; virtual; abstract;
    procedure SetShaderVariable(const AName: string; const AColor: TAlphaColor); overload; virtual; abstract;
  end;

  EFilterException = class(Exception);
  EFilterManagerException = class(Exception);

//== INTERFACE END: FMX.Filter
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Text (from FMX.Text.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type

  { TCaretPosition }

  /// <summary>Record describes platform independant position in multiline text</summary>
  /// <remarks>
  ///   Better use this type of position instead of absolute integer position. Absolute integer position includes
  ///   length of the LineBreak. It's value depends on platform (e.g. on Windows LineBreak.Length=2,
  ///   on OSX LineBreak.Length=1).
  ///   TCaretPosition is better in cases if you want to store current caret position in your application accross
  ///   multiple platforms.
  /// </remarks>
  TCaretPosition = record
    /// <summary>Text line number value</summary>
    Line: Integer;
    /// <summary>Caret position in line defined by Line value</summary>
    Pos: Integer;
  public
    /// <summary>Create new TCaretPosition with devined values of Line and Pos</summary>
    class function Create(const ALine, APos: Integer): TCaretPosition; static; inline;

    /// <summary>Overriding equality check operator</summary>
    class operator Equal(const A, B: TCaretPosition): Boolean;
    /// <summary>Overriding inequality check operator</summary>
    class operator NotEqual(const A, B: TCaretPosition): Boolean;
    /// <summary>Overriding compare operator: Less Or Equal</summary>
    class operator LessThanOrEqual(const A, B: TCaretPosition): Boolean;
    /// <summary>Overriding compare operator: Less Than</summary>
    class operator LessThan(const A, B: TCaretPosition): Boolean;
    /// <summary>Overriding compare operator: Greater Or Equal</summary>
    class operator GreaterThanOrEqual(const A, B: TCaretPosition): Boolean;
    /// <summary>Overriding compare operator: Greater Than</summary>
    class operator GreaterThan(const A, B: TCaretPosition): Boolean;
    /// <summary>Overriding implicit conversion to TPoint</summary>
    class operator Implicit(const APosition: TCaretPosition): TPoint;
    /// <summary>Overriding implicit conversion to TCaretPosition</summary>
    class operator Implicit(const APoint: TPoint): TCaretPosition;

    /// <summary>Returns zero caret position value (0; 0)</summary>
    class function Zero: TCaretPosition; inline; static;
    /// <summary>Resturn invalid caret position value (-1; -1)</summary>
    class function Invalid: TCaretPosition; inline; static;

    /// <summary>Increment line number value</summary>
    procedure IncrementLine;
    /// <summary>Decrement line number value</summary>
    procedure DecrementLine;
    /// <summary>Check wherever current caret position has zero value (0; 0)</summary>
    function IsZero: Boolean;
    /// <summary>
    ///  Checks wherever current caret position has invalid value (either <c>Line</c> or <c>Pos</c> has -1 value)
    /// </summary>
    function IsInvalid: Boolean;
    function ToString: string;
  end;

{ TTextService }

  TMarkedTextAttribute = (Input, TargetConverted, Converted, TargetNotConverted, InputError);

  TTextService = class(TNoRefCountObject)
  private
    FOwner: IControl;
    FMultiLine: Boolean;
    FMaxLength: Integer;
    FCharCase: TEditCharCase;
    FFilterChar: string;
    FImeMode: TImeMode;
    FMarkedTextPosition: TCaretPosition;
    procedure SetMarkedTextPosition(const Value: TCaretPosition);
  protected
                                                                                                                                   
    FCaretPosition: TPoint;
                                                                                                                                   
    FText: string;
    function GetText: string; virtual;
    procedure SetText(const Value: string); virtual;
    function GetCaretPosition: TPoint; virtual;
    procedure SetCaretPosition(const Value: TPoint); virtual;
    procedure SetMaxLength(const Value: Integer); virtual;
    procedure SetCharCase(const Value: TEditCharCase); virtual;
    procedure SetFilterChar(const Value: string); virtual;
    procedure ImeModeChanged; virtual;
    procedure TextChanged; virtual;
    procedure MarkedTextPositionChanged; virtual;
    procedure CaretPositionChanged; virtual;
    function GetMarketTextAttributes: TArray<TMarkedTextAttribute>; virtual;
  public
    constructor Create(const AOwner: IControl; const ASupportMultiLine: Boolean); virtual;
    destructor Destroy; override;
    { Text support }
    procedure InternalSetMarkedText(const AMarkedText: string); virtual; abstract;
    function InternalGetMarkedText: string; virtual; abstract;
    /// <summary>Returns <c>Text</c> with inserted IME <c>MarkedText</c>.</summary>
    function CombinedText: string; virtual;
    function TargetClausePosition: TPoint; virtual; abstract;
    function HasMarkedText: Boolean; virtual; abstract;
    { Enter/Exit }
    procedure EnterControl(const FormHandle: TWindowHandle); virtual; abstract;
    procedure ExitControl(const FormHandle: TWindowHandle); virtual; abstract;
    { Drawing Lines }
    procedure DrawSingleLine(const Canvas: TCanvas;
      const ARect: TRectF; const FirstVisibleChar: Integer; const Font: TFont;
      const AOpacity: Single; const Flags: TFillTextFlags; const ATextAlign: TTextAlign;
      const AVTextAlign: TTextAlign = TTextAlign.Center;
      const AWordWrap: Boolean = False); overload; virtual; abstract;
    procedure DrawSingleLine(const Canvas: TCanvas; const S: string;
      const ARect: TRectF; const Font: TFont;
      const AOpacity: Single; const Flags: TFillTextFlags; const ATextAlign: TTextAlign;
      const AVTextAlign: TTextAlign = TTextAlign.Center;
      const AWordWrap: Boolean = False); overload; virtual; abstract;

    /// <summary>Refreshes position of IME related UI controls.</summary>
    procedure RefreshImePosition; virtual;
    { IME Mode }
    function GetImeMode: TImeMode;
    procedure SetImeMode(const Value: TImeMode);
    { Selection }
    procedure BeginSelection; virtual;
    procedure EndSelection; virtual;
  public
    property CaretPosition: TPoint read GetCaretPosition write SetCaretPosition;
    /// <summary>Original text without IME marked text.</summary>
    property Text: string read GetText write SetText;
    property ImeMode: TImeMode read GetImeMode write SetImeMode default TImeMode.imDontCare;
    /// <summary>Defines the maximum text of the text that could inputed via text service</summary>
    property MaxLength: Integer read FMaxLength write SetMaxLength;
    /// <summary>Defines wherever input control allows to input several lines on text or just a single one.</summary>
    property Multiline: Boolean read FMultiLine;
    /// <summary>Defines input character case</summary>
    property CharCase: TEditCharCase read FCharCase write SetCharCase;
    /// <summary>Defines input filter</summary>
    property FilterChar: string read FFilterChar write SetFilterChar;
    /// <summary>Holds a reference to the text input control in UI</summary>
    property Owner: IControl read FOwner;
    /// <summary>Returns the IME text that user is entering.</summary>
    property MarkedText: string read InternalGetMarkedText;
    /// <summary>Specifies position of IME marked text.</summary>
    property MarkedTextPosition: TCaretPosition read FMarkedTextPosition write SetMarkedTextPosition;
    /// <summary>Returns text attributes for each character in <c>MarkedText</c>.</summary>
    property MarketTextAttributes: TArray<TMarkedTextAttribute> read GetMarketTextAttributes;
  end;

  TTextServiceClass = class of TTextService;

  IIMEComposingTextDecoration = interface
  ['{13D7F323-B51B-46B5-8455-9BB9ACBACF61}']
    function GetRange: TTextRange;
    function GetText: string;
  end;

{ TTextWordWrapping }

  ///<summary>Manage text line counting and line retrieving for a given width in a canvas.</summary>
  TTextWordWrapping = class
  public
    /// <summary>
    ///   Fills ALinesFound with the text that fits on a certain Width (AMaxWidth). Also fills the real maximum
    ///   with found.
    /// </summary>
    class procedure GetLines(const AText: string; const ACanvas: TCanvas; const AMaxWidth: Integer;
                             var ALinesFound: TStringList; var AResWidth: Integer);
    /// <summary>
    ///   Computes the number of lines needed to draw the text supplied for a certain Width (AMaxWidth). Also
    ///   fills the real maximum with found.
    /// </summary>
    class function ComputeLineCount(const AText: string; const ACanvas: TCanvas; const AMaxWidth: Integer;
                                    var AResWidth: Integer): Integer;
  end;

{ ITextInput }

  ITextInput = interface
    ['{56D79E74-58D6-4c1e-B832-F133D669B952}']
    function GetTextService: TTextService;
    { IME }
    /// <summary>Returns position</summary>
    function GetTargetClausePointF: TPointF;
    procedure StartIMEInput;
    procedure EndIMEInput;
    /// <summary>Platform using this method to notify control that either text or caret position was changed</summary>
    procedure IMEStateUpdated;
    { Selection }
    function GetSelection: string;
    /// <summary>Returns selection rect in local cooridnate system of text-input control.</summary>
    function GetSelectionRect: TRectF;
    function GetSelectionBounds: TRect;
    function GetSelectionPointSize: TSizeF;
    { Text }
    function HasText: Boolean;
  end;

{ ITextSelection }

  ITextSelection = interface
  ['{5BC4EB77-92BE-4CA7-8BC8-FF06846D12CE}']
    procedure SetSelection(const AStart: TCaretPosition; const ALength: Integer);
  end;

{ ITextLinesSource }

  /// <summary>Interface for accessing text lines.</summary>
  ITextLinesSource = interface
  ['{21E863AD-6411-4B68-A985-4D36D899DA97}']
    { Lines accessing }

    /// <summary>Returns line by index.</summary>
    function GetLine(const ALineIndex: Integer): string;
    /// <summary>Returns lines break separator.</summary>
    function GetLineBreak: string;
    /// <summary>Returns lines count.</summary>
    function GetCount: Integer;
    /// <summary>Returns concatted lines.</summary>
    function GetText: string;
    /// <summary>Returns line by index.</summary>
    property Lines[const AIndex: Integer]: string read GetLine; default;
    /// <summary>Line break separator.</summary>
    property LineBreak: string read GetLineBreak;
    /// <summary>Lines count.</summary>
    property Count: Integer read GetCount;
    /// <summary>Returns concatted lines.</summary>
    property Text: string read GetText;

    { Position conversion }

    /// <summary>
    ///   Convert absolute platform-dependent position in text to platform independent value in format
    ///   (line_number, position_in_line)
    /// </summary>
    function TextPosToPos(const APos: Integer): TCaretPosition;
    /// <summary>Convert platform-independent position to absolute platform-dependent position</summary>
    function PosToTextPos(const APostion: TCaretPosition): Integer;
  end;

  /// <summary>
  ///   Proxy source of text lines. Allows to modify the lines from the source <c>ITextLinesSource</c> taking into
  ///   account the current IME text. It's used to implement the IME text for the display mode
  ///   FMX.Text.Text Editor.TIMEDisplayMode=InlineText
  /// </summary>
  TIMETextLineSourceProxy = class(TNoRefCountObject, ITextLinesSource)
  private
    FOriginalLinesSource: ITextLinesSource;
    FMarkedTextPosition: TCaretPosition;
    FMarkedText: string;
    FNeedEmbedIMEText: Boolean;
    procedure SetMarkedTextPosition(const Value: TCaretPosition);
    procedure SetMarkedText(const Value: string);
    procedure SetNeedEmbedIMEText(const Value: Boolean);
  public
    constructor Create(const AOriginalLinseSource: ITextLinesSource);

    function CanEmbedIMEText: Boolean; virtual;
    function GetOriginalLine(const ALineIndex: Integer): string;
    function GetOriginalCount: Integer;

    { ITextLinesSource }
    function GetLine(const ALineIndex: Integer): string;
    function GetLineBreak: string;
    function GetCount: Integer;
    function GetText: string;
    function TextPosToPos(const APos: Integer): TCaretPosition;
    function PosToTextPos(const APostion: TCaretPosition): Integer;
  public
    /// <summary>The position where the IME text <c>MarkedText</c> should be inserted.</summary>
    property MarkedTextPosition: TCaretPosition read FMarkedTextPosition write SetMarkedTextPosition;
    /// <summary>The text inserted by the IME at the specified <c>MarkedTextPosition</c> position.</summary>
    property MarkedText: string read FMarkedText write SetMarkedText;
    /// <summary>
    ///   Is it necessary to embed the specified IME text <c>MarkedText</c> in the specified position
    ///   <c>MarkedTextPosition</c>?
    /// </summary>
    property NeedEmbedIMEText: Boolean read FNeedEmbedIMEText write SetNeedEmbedIMEText;
    { ITextLinesSource }
    property Lines[const AIndex: Integer]: string read GetLine; default;
    property LineBreak: string read GetLineBreak;
    property Count: Integer read GetCount;
    property Text: string read GetText;
  end;

  TInsertOption = (Selected, MoveCaret, CanUndo, UndoPairedWithPrev, Typed);
  TInsertOptions = set of TInsertOption;

  TDeleteOption = (MoveCaret, CanUndo, Selected);
  TDeleteOptions = set of TDeleteOption;

{ ITextSpellCheck }

  ITextSpellCheck = interface
    ['{30AA8C32-5ADA-456C-AAC5-B9F0309AE3A8}']
    { common }
    function IsSpellCheckEnabled: Boolean;
    function IsCurrentWordWrong: Boolean;
    function GetListOfPrepositions: TArray<string>;
    { Spell check }
    procedure HighlightSpell;
    procedure HideHighlightSpell;
  end;

{ ITextActions }

  { Standard actions for operation with the text. Objects which want to get
    support of actions in a shortcut menu shall implement this interface }
  ITextActions = interface
    ['{9DB49126-36DB-4193-AE96-C0BD27090DCD}']
    procedure DeleteSelection;
    procedure CopyToClipboard;
    procedure CutToClipboard;
    procedure PasteFromClipboard;
    procedure SelectAll;
    procedure SelectWord;
    procedure ResetSelection;
    procedure GoToTextEnd;
    procedure GoToTextBegin;
    procedure Replace(const AStartPos: Integer; const ALength: Integer; const AStr: string);
  end;

{ ITextSpellCheckActions }

  ITextSpellCheckActions = interface
    ['{82A33171-C825-4B7F-B0C4-A56DDD4FF85C}']
    procedure Spell(const AWord: string);
  end;

  { Search of boundaries of the word in the text since |Index|
    Returns an index of the left |BeginPos| and right |EndPos| boundary of the found word
      |Text| - Source text
      |Index| - Index of carriage position
      |BeginPos| - Index of carriage position
      |EndPos| - Index of carriage position
    Position of the carriage begins with 0. 0 specifies position of the carriage to the first character }
  function FindWordBound(const AText: string; const AIndex: Integer; out ABeginPos, AEndPos: Integer): Boolean;
  function GetLexemeBegin(const AText: string; const AIndex: Integer): Integer;
  function GetLexemeEnd(const AText: string; const AIndex: Integer): Integer;
  function GetNextLexemeBegin(const AText: string; const AIndex: Integer): Integer;
  function GetPrevLexemeBegin(const AText: string; const AIndex: Integer): Integer;
  function TruncateText(const Text: string; const MaxLength: Integer): string;
  /// <summary>Removes from the source string Input all characters that are not in the Filter string.</summary>
  function FilterText(const Input: string; const Filter: string): string;

type
  TNumValueType = (Integer, Float);

  TValidateTextEvent = procedure(Sender: TObject; var Text: string) of object;

  function FilterCharByValueType(const AValueType: TNumValueType): string;
  function TryTextToValue(AText: string; var AValue: Single; DefaultValue: Single): Boolean; overload;
  function TryTextToValue(AText: string; var AValue: Double; DefaultValue: Double): Boolean; overload;

//== INTERFACE END: FMX.Text
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Effects (from FMX.Effects.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type

{ ITriggerEffect }

  ITriggerEffect = interface
  ['{945DC18B-7801-43F8-997D-F19607399AE9}']
    procedure ApplyTriggerEffect(const AInstance: TFmxObject; const ATrigger: string);
  end;

  TEffectAnimator = class
  public
    class procedure ApplyTriggerEffect(const Target: TFmxObject; const AInstance: TFmxObject; const ATrigger: string);
    class procedure DefaultApplyTriggerEffect(const Target: TFmxObject; const AInstance: TFmxObject; const ATrigger: string);
  end;

{ TEffect }

  IEffectContainer = interface
  ['{FFC591A9-A520-45F2-BD49-17F76E7B057C}']
    procedure NeedUpdateEffects;
    procedure BeforeEffectEnabledChanged(const Enabled: Boolean);
    procedure EffectEnabledChanged(const Enabled: Boolean);
  end;

  TEffectStyle = (AfterPaint, DisablePaint, DisablePaintToBitmap);
  TEffectStyles = set of TEffectStyle;

  TEffect = class(TFmxObject)
  private
    FCacheLayer: IFilterCacheLayer;
    FEnabled: Boolean;
    FTrigger: TTrigger;
    procedure SetEnabled(const Value: Boolean);
  protected
    FEffectStyle: TEffectStyles;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    /// <summary>Initiate a drawing layer with the effect applied, creating a reusable cache.</summary>
    /// <returns>True when cache modification is required and False when the current cache could be drawn to the target without updating.</returns>
    function BeginLayer(const ATarget: TCanvas; const ADestRect: TRectF; const AOpacity: Single;
      const AHighSpeed: Boolean; var ACacheLayer: IFilterCacheLayer; out ACacheCanvas: TCanvas): Boolean; virtual;
    /// <summary>Concludes the layer update rendering the result onto the target.</summary>
    procedure EndLayer; virtual;
    function GetRect(const ARect: TRectF): TRectF; virtual;
    function GetOffset: TPointF; virtual;
    procedure ProcessEffect(const Canvas: TCanvas; const Visual: TBitmap; const Data: Single); virtual;
    procedure ApplyTrigger(AInstance: TFmxObject; const ATrigger: string); virtual;
    procedure UpdateParentEffects;
    property EffectStyle: TEffectStyles read FEffectStyle;
    property Trigger: TTrigger read FTrigger write FTrigger;
    property Enabled: Boolean read FEnabled write SetEnabled default True;
  end;

{ TFilterEffect }

  TFilterEffect = class(TEffect)
  private
    FFilter: TFilter;
  protected
    function CreateFilter: TFilter; virtual; abstract;
    property Filter: TFilter read FFilter;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function BeginLayer(const ATarget: TCanvas; const ADestRect: TRectF; const AOpacity: Single;
      const AHighSpeed: Boolean; var ACacheLayer: IFilterCacheLayer; out ACacheCanvas: TCanvas): Boolean; override;
    procedure EndLayer; override;
    procedure ProcessEffect(const Canvas: TCanvas; const Visual: TBitmap; const Data: Single); override;
    procedure ProcessTexture(const Visual: TTexture; const Context: TContext3D); virtual;
  end;

{ TBlurEffect }

  TBlurEffect = class(TFilterEffect)
  private
    FSoftness: Single;
    procedure SetSoftness(const Value: Single);
  protected
    function CreateFilter: TFilter; override;
  public
    constructor Create(AOwner: TComponent); override;
    function GetRect(const ARect: TRectF): TRectF; override;
    function GetOffset: TPointF; override;
  published
    property Softness: Single read FSoftness write SetSoftness nodefault;
    property Trigger;
    property Enabled;
  end;

{ TShadowEffect }

  TShadowEffect = class(TFilterEffect)
  private
    FDistance: Single;
    FSoftness: Single;
    FShadowColor: TAlphaColor;
    FOpacity: Single;
    FDirection: Single;
    procedure SetDistance(const Value: Single);
    procedure SetSoftness(const Value: Single);
    procedure SetShadowColor(const Value: TAlphaColor);
    procedure SetOpacity(const Value: Single);
    function GetShadowColor: TAlphaColor;
    procedure SetDirection(const Value: Single);
  protected
    function CreateFilter: TFilter; override;
  public
    constructor Create(AOwner: TComponent); override;
    function GetRect(const ARect: TRectF): TRectF; override;
    function GetOffset: TPointF; override;
  published
    property Distance: Single read FDistance write SetDistance;
    property Direction: Single read FDirection write SetDirection;
    property Softness: Single read FSoftness write SetSoftness nodefault;
    property Opacity: Single read FOpacity write SetOpacity nodefault;
    property ShadowColor: TAlphaColor read GetShadowColor write SetShadowColor;
    property Trigger;
    property Enabled;
  end;

{ TGlowEffect }

  TGlowEffect = class(TFilterEffect)
  private
    FGlowColor: TAlphaColor;
    FSoftness: Single;
    FOpacity: Single;
    procedure SetSoftness(const Value: Single);
    function GetGlowColor: TAlphaColor;
    procedure SetGlowColor(const Value: TAlphaColor);
    procedure SetOpacity(const Value: Single);
  protected
    function CreateFilter: TFilter; override;
  public
    constructor Create(AOwner: TComponent); override;
    function GetRect(const ARect: TRectF): TRectF; override;
    function GetOffset: TPointF; override;
  published
    property Softness: Single read FSoftness write SetSoftness nodefault;
    property GlowColor: TAlphaColor read GetGlowColor write SetGlowColor;
    property Opacity: Single read FOpacity write SetOpacity nodefault;
    property Trigger;
    property Enabled;
  end;

{ TInnerGlowEffect }

  TInnerGlowEffect = class(TFilterEffect)
  private
    FGlowColor: TAlphaColor;
    FSoftness: Single;
    FOpacity: Single;
    procedure SetSoftness(const Value: Single);
    function GetGlowColor: TAlphaColor;
    procedure SetGlowColor(const Value: TAlphaColor);
    procedure SetOpacity(const Value: Single);
  protected
    function CreateFilter: TFilter; override;
  public
    constructor Create(AOwner: TComponent); override;
    function GetRect(const ARect: TRectF): TRectF; override;
    function GetOffset: TPointF; override;
  published
    property Softness: Single read FSoftness write SetSoftness nodefault;
    property GlowColor: TAlphaColor read GetGlowColor write SetGlowColor;
    property Opacity: Single read FOpacity write SetOpacity nodefault;
    property Trigger;
    property Enabled;
  end;

{ TReflectionEffect }

  TReflectionEffect = class(TFilterEffect)
  private
    FOffset: Integer;
    FOpacity: Single;
    FLength: Single;
    procedure SetOpacity(const Value: Single);
    procedure SetOffset(const Value: Integer);
    procedure SetLength(const Value: Single);
  protected
    function CreateFilter: TFilter; override;
  public
    constructor Create(AOwner: TComponent); override;
    function GetRect(const ARect: TRectF): TRectF; override;
    function GetOffset: TPointF; override;
  published
    property Opacity: Single read FOpacity write SetOpacity nodefault;
    property Offset: Integer read FOffset write SetOffset;
    property Length: Single read FLength write SetLength;
    property Trigger;
    property Enabled;
  end;

{ TBevelEffect }

  TBevelEffect = class(TEffect)
  private
    FDirection: Single;
    FSize: Integer;
    procedure SetDirection(const Value: Single);
    procedure SetSize(const Value: Integer);
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function GetRect(const ARect: TRectF): TRectF; override;
    function GetOffset: TPointF; override;
    procedure ProcessEffect(const Canvas: TCanvas; const Visual: TBitmap; const Data: Single); override;
  published
    property Direction: Single read FDirection write SetDirection;
    property Size: Integer read FSize write SetSize;
    property Trigger;
    property Enabled;
  end;

{ TRasterEffect }

  TRasterEffect = class(TEffect)
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Trigger;
    property Enabled;
  end;

procedure Blur(const Canvas: TCanvas; const Bitmap: TBitmap;
  const Radius: Integer; UseAlpha: Boolean = True);

//== INTERFACE END: FMX.Effects
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Text.UndoManager (from FMX.Text.UndoManager.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  /// <summary>Information about fragment of the text that was inserted.</summary>
  TFragmentInserted = record
    /// <summary>Position in text where text was inserted.</summary>
    StartPos: Integer;
    /// <summary>Fragment of text that was inserted.</summary>
    Fragment: string;
    /// <summary>
    ///   Defines that change was made right after the previous and was made in the similar way
    ///   (e.g. text editing (delete and insert) via keyabord).
    /// </summary>
    PairedWithPrev: Boolean;
    /// <summary>Was text inserted via typing from keyboard or not.</summary>
    Typed: Boolean;
  public
    /// <summary>Create new information about inserted text with defined values.</summary>
    constructor Create(const AStartPos: Integer; const AFragment: string; const APairedWithPrev, ATyped: Boolean);
  end;

  /// <summary>Information about fragment of the text that was removed.</summary>
  TFragmentDeleted = record
    /// <summary>Position in text from which text was deleted.</summary>
    StartPos: Integer;
    /// <summary>Fragment of text that was deleted.</summary>
    Fragment: string;
    /// <summary>Was removed text select or not.</summary>
    Selected: Boolean;
    /// <summary>Was caret moved after text was removed or not.</summary>
    CaretMoved: Boolean;
  public
    /// <summary>Create new information about removed text with defined values.</summary>
    constructor Create(const AStartPos: Integer; const AFragment: string; const ASelected, ACaretMoved: Boolean);
  end;

  { TUndoManager }

  TActionType = (Delete, Insert);

  ///<summary>Record that describes text-editing operation.</summary>
  TEditAction = record
    ///<summary>Type of change that was made (text added or removed).</summary>
    ActionType: TActionType;
    ///<summary>Defines that change was made right after the previous and was made in the similar way
    ///(e.g. text editing (delete and insert) via keyabord).</summary>
    PairedWithPrev: Boolean;
    ///<summary>Position in text from which text was deleted or into which text was inserted.</summary>
    StartPosition: Integer;
    ///<summary>Fragmen of text that was inserted/deleted.</summary>
    Fragment: string;
    ///<summary>Was text inserted via typing from keyboard or not.</summary>
    Typed: Boolean;
    ///<summary>Was removed text select or not.</summary>
    WasSelected: Boolean;
    ///<summary>Was caret moved after text was removed or not.</summary>
    CaretMoved: Boolean;
  end;

  TUndoEvent = procedure (Sender: TObject; const AActionType: TActionType; const AEditInfo: TEditAction;
                          const AOptions: TInsertOptions) of object;
                          
  TRedoEvent = procedure (Sender: TObject; const AActionType: TActionType; const AEditInfo: TEditAction;
                          const AOptions: TDeleteOptions) of object;
  
  /// <summary>
  ///   The manager is responsible for tracking and canceling editable operations. The user of this class must notify the manager 
  ///   about the operations being edited through the methods FragmentInserted and FragmentDeleted. The class saves these operations 
  ///   and allows you to cancel them. To undo an action, the user calls the Undo method and the manager notifies the client about 
  ///   the operation parameters via the OnUndo event. The same is for Redo operation.
  /// </summary>
  TUndoManager = class
  private
    FActions: TList<TEditAction>;
    FCurrentActionIndex: Integer;
    FOnUndo: TUndoEvent;
    FOnRedo: TRedoEvent;
    function GetCurrentAction: TEditAction;
  protected
    procedure DoUndo(const AActionType: TActionType; const AEditInfo: TEditAction; const AOptions: TInsertOptions); virtual;
    procedure DoRedo(const AActionType: TActionType; const AEditInfo: TEditAction; const AOptions: TDeleteOptions); virtual;
    procedure AddAction(const AAction: TEditAction);
    procedure RemoveTailActions;
    property CurrentAction: TEditAction read GetCurrentAction;    
  public
    constructor Create;
    destructor Destroy; override;

    { Notifications about text changes }

    ///<summary>New fragment of text was inserted.</summary>
    procedure FragmentInserted(const AStartPos: Integer; const AFragment: string; const APairedWithPrev, ATyped: Boolean);
    ///<summary>Some text fragment was removed.</summary>
    procedure FragmentDeleted(const AStartPos: Integer; const AFragment: string; const ASelected, ACaretMoved: Boolean);

    { Undo operations }

    ///<summary>Revert last change.</summary>
    function Undo: Boolean;
    /// <summary>Does the manager have undo fragments?</summary>
    function CanUndo: Boolean;

    { Redo operations }
    
    /// <summary>Apply next change.</summary>
    function Redo: Boolean;
    /// <summary>Does the manager have redo fragments?</summary>
    function CanRedo: Boolean;        
  public
    /// <summary>The event is being invoked with undo action parameters, when client initiate undo operation.</summary>
    property OnUndo: TUndoEvent read FOnUndo write FOnUndo;
    /// <summary>The event is being invoked with redo action parameters, when client initiate redo operation.</summary>
    property OnRedo: TRedoEvent read FOnRedo write FOnRedo;
  end;

  TEditActionStack = TUndoManager deprecated 'Use TUndoManager instead';

//== INTERFACE END: FMX.Text.UndoManager
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Controls (from FMX.Controls.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  TControl = class;
  TStyledControl = class;
  TStyleBook = class;

  IStyleBookOwner = interface
    ['{BA1AE6C6-FCF7-43E2-92AA-2869FF203309}']
    function GetStyleBook: TStyleBook;
    procedure SetStyleBook(const Value: TStyleBook);
    property StyleBook: TStyleBook read GetStyleBook write SetStyleBook;
  end;

  IScene = interface(IStyleBookOwner)
    ['{16DB110E-DA7D-4e75-BC2D-999FA12E45F5}']
    procedure AddUpdateRect(const R: TRectF);
    function GetUpdateRectsCount: Integer;
    function GetUpdateRect(const Index: Integer): TRectF;
    function GetObject: TFmxObject;
    function GetCanvas: TCanvas;
    function GetSceneScale: Single;
    /// <summary>Converts a point from the scene coordinate system to the screen coordinate system.</summary>
    function LocalToScreen(const AScenePoint: TPointF): TPointF;
    /// <summary>Converts a point from the screen coordinate system to the scene coordinate system.</summary>
    function ScreenToLocal(const AScreenPoint: TPointF): TPointF;
    procedure ChangeScrollingState(const AControl: TControl; const AActive: Boolean);
    /// <summary>Disable Scene's updating</summary>
    procedure DisableUpdating;
    /// <summary>Enable Scene's updating</summary>
    procedure EnableUpdating;
    property Canvas: TCanvas read GetCanvas;
  end;

  /// <summary>Exception raised when the process for Disabling Updating and
  /// Enabling Upating is not correct.</summary>
  EInvalidSceneUpdatingPairCall = class(Exception);

  { IDesignerControl: Control implementing this is part of the designer }
  IDesignerControl = interface
    ['{C57A701D-E4B5-4711-BFA4-716E2164A929}']
  end;

  /// <summary>Controls that can respond to hint-related events must implement
  /// this interface.</summary>
  IHintReceiver = interface
    ['{533671CF-86C5-489E-B32A-724AF8464DCE}']
    /// <summary>This method is called when a hint is triggered.</summary>
    procedure TriggerOnHint;
  end;

  /// <summary>A class needs to implement this interface in order to be able to
  /// register IHintReceiver instances.</summary>
  IHintRegistry = interface
    ['{8F3B3C46-450B-4A8C-800F-FD47538244C3}']
    /// <summary>Triggers the TriggerOnHint method of all the objects that are registered in this registry.</summary>
    procedure TriggerHints;
    /// <summary>Registers a new receiver.</summary>
    procedure RegisterHintReceiver(const AReceiver: IHintReceiver);
    /// <summary>Unregisters a receiver.</summary>
    procedure UnregisterHintReceiver(const AReceiver: IHintReceiver);
  end;

  /// <summary>The base class for an object that can manage a hint.</summary>
  THint = class
  public type
    THintClass = class of THint;
  private class var
    FClassRegistry: TArray<THintClass>;
  protected
    /// <summary>Field to store the hint.</summary>
    FHint: string;
    /// <summary>Field to store the status (enabled or not) of the hint.</summary>
    FEnabled: Boolean;
    /// <summary>Method that updates the state of enabled.</summary>
    procedure SetEnabled(const Value: Boolean); virtual;
  public
    /// <summary>Constructor. A constructor needs the native handle of the view that holds the hint. To give an example,
    /// in MS Windows is the HWND of the native window.</summary>
    constructor Create(const AHandle: TWindowHandle); virtual;
    /// <summary>Sets the full hint string.</summary>
    procedure SetHint(const AString: string); virtual;
    /// <summary>Gets the full hint string.</summary>
    function GetHint: string;
    /// <summary>The hint can follows the following pattern:  'A short Text| A Long text'. It means, the hint can hold
    /// two texts separated by the '|' character. This method returns the short text of the hint.</summary>
    function GetShortText: string;
    /// <summary>Returns the long text of the hint.</summary>
    function GetLongText: string;
    /// <summary>If the specific implementation supports it, this metods places the hint in the given position.</summary>
    procedure SetPosition(const X, Y: Single); virtual; abstract;
    /// <summary>Register a class to create hint instances. When a new THint instance is needed, the registered classes are invoked
    /// to create the needed instance.</summary>
    class procedure RegisterClass(const AClass: THintClass);
    /// <summary>Returns an instance created by the first available registered class. This method can return nil if there are no classes
    /// registered or none of the registered classes can create a THint instance.</summary>
    class function CreateNewInstance(const AHandle: TWindowHandle): THint;
    /// <summary>Returns True if there are some THint class registered.</summary>
    class function ContainsRegistredHintClasses: Boolean;

    /// <summary>If this property is true, the hint can be displayed, if it is False, the hint won't be displayed.</summary>
    property Enabled: Boolean read FEnabled write SetEnabled;
  end;

{ TCustomControlAction }
  TCustomControlAction = class(TCustomAction)
  private
    [weak]FPopupMenu: TCustomPopupMenu;
    procedure SetPopupMenu(const Value: TCustomPopupMenu);
  protected
    procedure Notification(AComponent: TComponent;  Operation: TOperation); override;
  public
    constructor Create(AOwner: TComponent); override;
    property PopupMenu: TCustomPopupMenu read FPopupMenu write SetPopupMenu;
  end;

{ TControlAction }

  TControlAction = class(TCustomControlAction)
  published
    property AutoCheck;
    property Text;
    property Checked;
    property Enabled;
    property GroupIndex;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property ImageIndex;
    property ShortCut;
    property SecondaryShortCuts;
    property Visible;
    property UnsupportedArchitectures;
    property UnsupportedPlatforms;
    property OnExecute;
    property OnHint;
    property OnUpdate;
    property PopupMenu;
  end;

{ TControlActionLink }
  /// <summary>Links an action to a client (generic control).</summary>
  TControlActionLink = class(FMX.ActnList.TActionLink)
  private
    function GetClient: TControl;
  protected
    procedure AssignClient(AClient: TObject); override;
    function IsEnabledLinked: Boolean; override;
    function IsHelpLinked: Boolean;  override;
    function IsHintLinked: Boolean; override;
    function IsVisibleLinked: Boolean; override;
    function IsOnExecuteLinked: Boolean; override;
    function IsPopupMenuLinked: boolean; virtual;
    /// <summary>This method is invoked to allow a link to customize a Hint that is going to be displayed.</summary>
    function DoShowHint(var HintStr: string): Boolean; virtual;
    /// <summary>This method sets the string of the hint.</summary>
    procedure SetHint(const Value: string); override;
    procedure SetEnabled(Value: Boolean); override;
    procedure SetHelpContext(Value: THelpContext); override;
    procedure SetHelpKeyword(const Value: string); override;
    procedure SetHelpType(Value: THelpType); override;
    procedure SetVisible(Value: Boolean); override;
    procedure SetOnExecute(Value: TNotifyEvent); override;
    procedure SetPopupMenu(const Value: TCustomPopupMenu); virtual;
    procedure SetShortCut(Value: System.Classes.TShortCut); override;
  public
    property Client: TControl read GetClient;
  end;

  TCaret = class (TCustomCaret)
  private const
    FMXFlasher = 'FMXFlasher';
  public
    class function FlasherName: string; override;
  published
    property Color;
    property Interval;
    property Width;
  end;

{ TControl }

  TEnumControlsResult = TEnumProcResult;

  TEnumControlsRef = reference to procedure(const AControl: TControl; var Done: boolean);

  TControlList = TList<TControl>;

  TOnPaintEvent = procedure(Sender: TObject; Canvas: TCanvas; const ARect: TRectF) of object;

  TCustomSceneAddRectEvent = procedure (Sender: TControl; ARect: TRectF) of object;

  TPaintStage = (All, Background, Text);

  TControlType = (Styled, Platform);

  /// <summary>Helper for TControlType.</summary>
  TControlTypeHelper = record helper for TControlType
  public
    /// <summary>Returns string presentation of value of this type</summary>
    function ToString: string;
  end;

  /// <summary>
  ///   The marker for TControl component, which supports native control implementation. Use this interface to mark
  ///   the component that can use the native OS implementation. The FMX platform implementation may use it for
  ///   the better manipulation of focus management.
  /// </summary>
  IControlTypeSupportable = interface
  ['{0B538F5C-98AC-4F86-AAF1-9979B2F40B90}']
    procedure SetControlType(const AControlType: TControlType);
    function GetControlType: TControlType;
    property ControlType: TControlType read GetControlType write SetControlType;
  end;

  TControl = class(TFmxObject, IControl, IContainerObject, IAlignRoot, IRotatedControl, IAlignableObject,
    IEffectContainer, IGestureControl, ITabStopController, ITriggerAnimation, ITriggerEffect, IFlipContainer)
  private type
    TDelayedEvent = (Resize, Resized);
  private const
    InitialControlsCapacity = 10;
  public const
    DefaultTouchTargetExpansion = 6;
    DefaultDisabledOpacity = 0.6;
    DesignBorderColor = $A0909090;
  private class var
    FPaintStage: TPaintStage;
  strict private
    FOnMouseUp: TMouseEvent;
    FOnMouseDown: TMouseEvent;
    FOnMouseMove: TMouseMoveEvent;
    FOnMouseWheel: TMouseWheelEvent;
    FOnClick: TNotifyEvent;
    FOnDblClick: TNotifyEvent;
    FHitTest: Boolean;
    FClipChildren: Boolean;
    FAutoCapture: Boolean;
    FPadding: TBounds;
    FMargins: TBounds;
    FTempCanvas: TCanvas;
    FRotationAngle: Single;
    FPosition: TPosition;
    FScale: TPosition;
    FSkew: TPosition;
    FRotationCenter: TPosition;
    FCanFocus: Boolean;
    FOnCanFocus: TCanFocusEvent;
    FOnEnter: TNotifyEvent;
    FOnExit: TNotifyEvent;
    FClipParent: Boolean;
    FOnMouseLeave: TNotifyEvent;
    FOnMouseEnter: TNotifyEvent;
    FOnPaint: TOnPaintEvent;
    FOnPainting: TOnPaintEvent;
    FCursor: TCursor;
    FInheritedCursor: TCursor;
    FDragMode: TDragMode;
    FEnableDragHighlight: Boolean;
    FOnDragEnter: TDragEnterEvent;
    FOnDragDrop: TDragDropEvent;
    FOnDragLeave: TNotifyEvent;
    FOnDragOver: TDragOverEvent;
    FOnDragEnd: TNotifyEvent;
    FIsDragOver: Boolean;
    FOnKeyDown: TKeyEvent;
    FOnKeyUp: TKeyEvent;
    FOnTap: TTapEvent;
    FHint: string;
    FActionHint: string;
    FShowHint: Boolean;
    FPopupMenu: TCustomPopupMenu;
    FRecalcEnabled, FEnabled, FAbsoluteEnabled: Boolean;
    FTabList: TTabList;
    FOnResize: TNotifyEvent;
    FOnResized: TNotifyEvent;
    FDisableEffect: Boolean;
    FAcceptsControls: Boolean;
    FControls: TControlList;
    FEnableExecuteAction: Boolean;
    FCanParentFocus: Boolean;
    FMinClipHeight: Single;
    FMinClipWidth: Single;
    FSmallSizeControl: Boolean;
    FTouchTargetExpansion: TBounds;
    FOnDeactivate: TNotifyEvent;
    FOnActivate: TNotifyEvent;
    FSimpleTransform: Boolean;
    FFixedSize: TSize;
    FEffects: TList<TEffect>;
    FDisabledOpacity: Single;
    [Weak] FParentControl: TControl;
    FParentContent: IContent;
    FParentContentObserver: IContentObserver;
    FUpdateRect: TRectF;
    FTabStop: Boolean;
    FDisableDisappear: Integer;
    FAnchorMove: Boolean;
    FApplyingEffect: Boolean;
    FExitingOrEntering: Boolean;
    FDelayedEvents: set of TDelayedEvent;
    FTabOrder: TTabOrder;
    procedure AddToEffectsList(const AEffect: TEffect);
    procedure RemoveFromEffectsList(const AEffect: TEffect);
    class var FEmptyControlList: TControlList;
    function GetInvertAbsoluteMatrix: TMatrix;
    procedure SetPosition(const Value: TPosition);
    procedure SetHitTest(const Value: Boolean);
    procedure SetClipChildren(const Value: Boolean);
    function GetCanvas: TCanvas; inline;
    procedure SetLocked(const Value: Boolean);
    procedure SetTempCanvas(const Value: TCanvas);
    procedure SetOpacity(const Value: Single);
    function IsOpacityStored: Boolean;
    procedure SetCursor(const Value: TCursor);
    procedure RefreshInheritedCursor;
    procedure RefreshInheritedCursorForChildren;
    function GetAbsoluteWidth: Single;
    function GetAbsoluteHeight: Single;
    function IsAnchorsStored: Boolean;
    function GetEnabled: Boolean;
    function GetCursor: TCursor;
    function GetInheritedCursor: TCursor;
    function GetAbsoluteHasEffect: Boolean;
    function GetAbsoluteHasDisablePaintEffect: Boolean;
    function GetAbsoluteHasAfterPaintEffect: Boolean;
    procedure PaddingChangedHandler(Sender: TObject); overload;
    procedure MarginsChanged(Sender: TObject);
    procedure MatrixChanged(Sender: TObject);
    procedure SizeChanged(Sender: TObject);
    function GetControlsCount: Integer;
    function OnClickStored: Boolean;
    function IsPopupMenuStored: Boolean;
    procedure RequestAlign;
    procedure SetMinClipHeight(const Value: Single);
    procedure SetMinClipWidth(const Value: Single);
    function UpdateSmallSizeControl: Boolean;
    class constructor Create;
    class destructor Destroy;
    procedure SetOnClick(const Value: TNotifyEvent);
    function GetIsFocused: Boolean;
    procedure SetPadding(const Value: TBounds);
    procedure SetMargins(const Value: TBounds);
    procedure SetTouchTargetExpansion(const Value: TBounds);
    procedure InternalSizeChanged;
    procedure ReadFixedWidth(Reader: TReader);
    procedure WriteFixedWidth(Writer: TWriter);
    procedure ReadFixedHeight(Reader: TReader);
    procedure WriteFixedHeight(Writer: TWriter);
    procedure ReadDesignVisible(Reader: TReader);
    procedure ReadHint(Reader: TReader);
    procedure ReadShowHint(Reader: TReader);
    function DisabledOpacityStored: Boolean;
    procedure SetDisabledOpacity(const Value: Single);
    function GetAxisAlignedRect: TRectF;
    { IRotatedControl }
    function GetRotationAngle: Single;
    function GetRotationCenter: TPosition;
    function GetScale: TPosition;
    procedure SetRotationAngle(const Value: Single);
    procedure SetRotationCenter(const Value: TPosition);
    procedure SetScale(const Value: TPosition);
    function GetTabOrder: TTabOrder;
    procedure SetTabOrder(const Value: TTabOrder);
    function GetTabStop: Boolean;
    procedure SetTabStop(const TabStop: Boolean);
    procedure SetDisableDisappear(const Value: Boolean);
    function GetDisableDisappear: Boolean;
    procedure UpdateParentProperties;
    procedure EnumRenderableControls(const AConsumer: TProc<TControl>);
  private
    FInflated: Boolean;
    FOnApplyStyle: TNotifyEvent;
    FOnFreeStyle: TNotifyEvent;
    FAlign: TAlignLayout;
    FAnchors: TAnchors;
    FDisableFocusEffect: Boolean;
    FTouchManager: TTouchManager;
    FOnGesture: TGestureEvent;
    FVisible: Boolean;
    FPressed: Boolean;
    FPressedPosition: TPointF;
    FDoubleClick: Boolean;
    FParentShowHint: Boolean;
    FCustomSceneAddRect: TCustomSceneAddRectEvent;
    procedure CreateTouchManagerIfRequired;
    function GetTouchManager: TTouchManager;
    procedure SetTouchManager(const Value: TTouchManager);
    function IsShowHintStored: Boolean;
    procedure SetParentShowHint(const Value: Boolean);
    procedure SetShowHint(const Value: Boolean);
    function GetAbsoluteClipRect: TRectF;
    function HintStored: Boolean;
  strict protected
    procedure RepaintJointArea(const DestControl: TFmxObject);
  protected
    FScene: IScene;
    FLastHeight: Single;
    FLastWidth: Single;
    FSize: TControlSize;
    FLocalMatrix: TMatrix;
    FAbsoluteMatrix: TMatrix;
    FInvAbsoluteMatrix: TMatrix;
    FEffectCache: IFilterCacheLayer;
    FLocked: Boolean;
    FOpacity, FAbsoluteOpacity: Single;
    FInPaintTo: Boolean;
    FInPaintToAbsMatrix, FInPaintToInvMatrix: TMatrix;
    FAbsoluteHasEffect: Boolean;
    FAbsoluteHasDisablePaintEffect: Boolean;
    FAbsoluteHasAfterPaintEffect: Boolean;
    FUpdating: Integer;
    FNeedAlign: Boolean;
    FDisablePaint: Boolean;
    FDisableAlign: Boolean;
    FRecalcOpacity: Boolean;
    FRecalcUpdateRect: Boolean;
    FRecalcAbsolute: Boolean;
    FRecalcHasEffect: Boolean;
    FHasClipParent: TControl;
    FRecalcHasClipParent: Boolean;
    FDesignInteractive: Boolean;
    FDesignSelectionMarks: Boolean;
    FIsMouseOver: Boolean;
    FIsFocused: Boolean;
    { added for aligment using a relation between align and anchors}
    FAnchorRules: TPointF;
    FAnchorOrigin: TPointF;
    FOriginalParentSize: TPointF;
    FLeft: Single;
    FTop: Single;
    FExplicitLeft: Single;
    FExplicitTop: Single;
    FExplicitWidth: Single;
    FExplicitHeight: Single;
    procedure DoAbsoluteChanged; virtual;
    function CheckHitTest(const AHitTest: Boolean): Boolean; virtual;
    procedure SetInPaintTo(Value: Boolean);
    procedure EndUpdateNoChanges;
    /// <summary>This method sets the hint string for this control.</summary>
    procedure SetHint(const AHint: string); virtual;
    { }
    procedure SetEnabled(const Value: Boolean); virtual;
    procedure Loaded; override;
    procedure Updated; override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
    procedure ParentChanged; override;
    procedure ParentContentChanged; virtual;
    procedure ChangeOrder; override;
    procedure ChangeChildren; override;
    procedure SetVisible(const Value: Boolean); virtual;
    function DoSetWidth(var Value: Single; NewValue: Single; var LastValue: Single): Boolean; virtual; deprecated 'Use DoSetSize';
    function DoSetHeight(var Value: Single; NewValue: Single; var LastValue: Single): Boolean; virtual; deprecated 'Use DoSetSize';
    function DoSetSize(const ASize: TControlSize; const NewPlatformDefault: Boolean; ANewWidth, ANewHeight: Single;
      var ALastWidth, ALastHeight: Single): Boolean; virtual;
    procedure HandleSizeChanged; virtual;
    { matrix }
    procedure DoMatrixChanged(Sender: TObject); virtual;
    procedure SetHeight(const Value: Single); virtual;
    procedure SetWidth(const Value: Single); virtual;
    procedure SetSize(const AValue: TControlSize); overload; virtual;
    procedure SetSize(const AWidth, AHeight: Single; const APlatformDefault: Boolean = False); overload; virtual;
    function GetAbsoluteRect: TRectF; virtual;
    function GetChildrenMatrix(var Matrix: TMatrix; var Simple: Boolean): Boolean; virtual;
    function GetAbsoluteScale: TPointF; virtual;
    function GetParentedRect: TRectF; virtual; deprecated 'Use GetBoundsRect';
    function GetClipRect: TRectF; virtual;
    function GetEffectsRect: TRectF; virtual;
    function GetAbsoluteEnabled: Boolean; virtual;
    function GetChildrenRect: TRectF; virtual;
    function GetLocalRect: TRectF; virtual;
    function GetBoundsRect: TRectF; virtual;
    procedure SetBoundsRect(const Value: TRectF); virtual;
    function IsHeightStored: Boolean; virtual; deprecated 'Use IsSizeStored';
    function IsWidthStored: Boolean; virtual; deprecated 'Use IsSizeStored';
    function IsPositionStored: Boolean; virtual;
    function IsSizeStored: Boolean; virtual;
    procedure SetPopupMenu(const Value: TCustomPopupMenu);
    { optimizations }
    procedure RecalculateAbsoluteMatrices; virtual;
    function GetAbsoluteMatrix: TMatrix; virtual;
    function GetHasClipParent: TControl;
    function GetUpdateRect: TRectF;
    function DoGetUpdateRect: TRectF; virtual;
    { opacity }
    function GetAbsoluteOpacity: Single; virtual;
    { events }
    procedure BeginAutoDrag; virtual;
    procedure Capture;
    procedure ReleaseCapture;
    property EnableExecuteAction: boolean read FEnableExecuteAction write FEnableExecuteAction;
    procedure Click; virtual;
    procedure DblClick; virtual;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); virtual;
    procedure MouseMove(Shift: TShiftState; X, Y: Single); virtual;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); virtual;
    procedure MouseWheel(Shift: TShiftState; WheelDelta: Integer; var Handled: Boolean); virtual;
    procedure MouseClick(Button: TMouseButton; Shift: TShiftState; X, Y: Single); virtual;
    procedure KeyDown(var Key: Word; var KeyChar: WideChar; Shift: TShiftState); virtual;
    procedure KeyUp(var Key: Word; var KeyChar: WideChar; Shift: TShiftState); virtual;
    procedure DialogKey(var Key: Word; Shift: TShiftState); virtual;
    procedure AfterDialogKey(var Key: Word; Shift: TShiftState); virtual;
    function ShowContextMenu(const ScreenPosition: TPointF): Boolean; virtual;
    procedure DragEnter(const Data: TDragObject; const Point: TPointF); virtual;
    procedure DragOver(const Data: TDragObject; const Point: TPointF; var Operation: TDragOperation); virtual;
    procedure DragDrop(const Data: TDragObject; const Point: TPointF); virtual;
    procedure DragLeave; virtual;
    procedure DragEnd; virtual;
    function GetDefaultTouchTargetExpansion: TRectF; virtual;
    function GetCanFocus: Boolean; virtual;
    function GetCanParentFocus: Boolean; virtual;
    function EnterChildren(AObject: IControl): Boolean; virtual;
    function ExitChildren(AObject: IControl): Boolean; virtual;
    function GetParentedVisible: Boolean; virtual;
    { IEffectContainer }
    procedure NeedUpdateEffects;
    procedure BeforeEffectEnabledChanged(const Enabled: Boolean);
    procedure EffectEnabledChanged(const Enabled: Boolean);
    { IAlignRoot }
    procedure Realign;
    procedure ChildrenAlignChanged;
    { IAlignableObject }
    function GetAlign: TAlignLayout;
    procedure SetAlign(const Value: TAlignLayout); virtual;
    function GetAnchors: TAnchors;
    procedure SetAnchors(const Value: TAnchors); virtual;
    function GetMargins: TBounds;
    function GetPadding: TBounds;
    function GetWidth: Single; virtual;
    function GetHeight: Single; virtual;
    function GetLeft: Single; virtual;
    function GetTop: Single; virtual;
    function GetAllowAlign: Boolean;
    function GetAnchorRules : TPointF;
    function GetAnchorOrigin : TPointF;
    function GetOriginalParentSize : TPointF;
    function GetAnchorMove : Boolean;
    procedure SetAnchorMove(Value : Boolean);
    function GetAdjustSizeValue: TSizeF; virtual;
    function GetAdjustType: TAdjustType; virtual;
    { IContainerObject }
    function GetContainerWidth: Single;
    function GetContainerHeight: Single;
    { IControl }
    function IControl.GetObject = GetObject;
    function GetObject: TFmxObject;
    function GetParent: TFmxObject;
    function GetVisible: Boolean; virtual;
    function GetDesignInteractive: Boolean;
    function GetPopupMenu: TCustomPopupMenu;
    procedure DoEnter; virtual;
    procedure DoExit; virtual;
    procedure DoActivate; virtual;
    procedure DoDeactivate; virtual;
    procedure DoMouseEnter; virtual;
    procedure DoMouseLeave; virtual;
    function CheckForAllowFocus: Boolean;
    function GetDragMode: TDragMode; virtual;
    procedure SetDragMode(const ADragMode: TDragMode); virtual;
    function GetLocked: Boolean;
    function GetHitTest: Boolean;
    function GetAcceptsControls: Boolean;
    procedure SetAcceptsControls(const Value: boolean);
    function FindTarget(P: TPointF; const Data: TDragObject): IControl; virtual;
    function ObjectAtPoint(AScreenPoint: TPointF): IControl; virtual;
    /// <summary>Implementation of IControl.HasHint. See IControl for details.</summary>
    function HasHint: Boolean; virtual;
    /// <summary>Implementation of IControl.GetHintString. See IControl for details.</summary>
    function GetHintString: string; virtual;
    /// <summary>Implementation of IControl.GetHintObject. See IControl for details.</summary>
    function GetHintObject: TObject; virtual;
    /// <summary>This method returns true if the control can show hint according <c>ParentShowHint</c>,
    /// <c>ShowHint</c> and settings of parent control values.</summary>
    function CanShowHint: Boolean; virtual;
    { IGestureControl }
    procedure BroadcastGesture(EventInfo: TGestureEventInfo);
    procedure CMGesture(var EventInfo: TGestureEventInfo); virtual;
    function TouchManager: TTouchManager;
    function GetFirstControlWithGesture(AGesture: TInteractiveGesture): TComponent; virtual;
    function GetFirstControlWithGestureEngine: TComponent;
    function GetListOfInteractiveGestures: TInteractiveGestures;
    procedure Tap(const Point:TPointF); virtual;
    { optimization }
    function GetFirstVisibleObjectIndex: Integer; virtual;
    function GetLastVisibleObjectIndex: Integer; virtual;
    function GetDefaultSize: TSizeF; virtual;
    { bi-di }
    function FillTextFlags: TFillTextFlags; virtual;
    { paint internal }
    procedure ApplyEffect; virtual;
    procedure PaintInternal;
    procedure DrawDragHighlight; virtual;
    function SupportsPaintStage(const Stage: TPaintStage): Boolean; virtual;
    { paint }
    function CanRepaint: Boolean; virtual;
    procedure RepaintRect(const Rect: TRectF);
    procedure PaintChildren; virtual;
    procedure Painting; virtual;
    procedure Paint; virtual;
    procedure DoPaint; virtual;
    procedure AfterPaint; virtual;
    procedure DrawDesignBorder(const VertColor: TAlphaColor = DesignBorderColor;
      const HorzColor: TAlphaColor = DesignBorderColor);
    { align }
    procedure DoRealign; virtual;
    procedure DoBeginUpdate; virtual;
    procedure DoEndUpdate; virtual;
    function CanFlipChild(const AChild: TFmxObject): Boolean; virtual;
    procedure DoFlipChildren; virtual;
    { changes }
    procedure Move; virtual;
    procedure Resize; virtual;
    procedure DoResized; virtual;
    procedure Disappear; virtual;
    procedure Show; virtual;
    procedure Hide; virtual;
    procedure AncestorVisibleChanged(const Visible: Boolean); virtual;
    /// <summary>Notification about changed parent of ancestor</summary>
    procedure AncestorParentChanged; virtual;
    procedure ClipChildrenChanged; virtual;
    procedure HitTestChanged; virtual;
    /// <summary>Notification about changed padding</summary>
    procedure PaddingChanged; overload; virtual;
    property MinClipWidth: Single read FMinClipWidth write SetMinClipWidth;
    property MinClipHeight: Single read FMinClipHeight write SetMinClipHeight;
    property SmallSizeControl: Boolean read FSmallSizeControl;
    { children }
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoInsertObject(Index: Integer; const AObject: TFmxObject); override;
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    procedure DoDeleteChildren; override;
    { props }
    class property PaintStage: TPaintStage read FPaintStage write FPaintStage;
    property TempCanvas: TCanvas read FTempCanvas write SetTempCanvas;
    { added for aligment using a relation between align and anchors}
    procedure SetLeft(const Value: Single);
    procedure SetTop(const Value: Single);
    procedure UpdateExplicitBounds;
    procedure UpdateAnchorRules(const Anchoring: Boolean = False);
    property Left: Single read FLeft write SetLeft;
    property Top: Single read FTop write SetTop;
    property ExplicitLeft: Single read FExplicitLeft;
    property ExplicitTop: Single read FExplicitTop;
    property ExplicitWidth: Single read FExplicitWidth;
    property ExplicitHeight: Single read FExplicitHeight;
    function GetActionLinkClass: TActionLinkClass; override;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    function EnabledStored: Boolean; virtual;
    function VisibleStored: Boolean; virtual;
    /// <summary> This method is called after change field <b>FEnabled</b> in <b>SetEnabled</b> before all other
    /// actions</summary>
    procedure EnabledChanged; virtual;
    /// <summary> This method is called after change field <b>FVisible</b> in <b>SetVisible</b> before all other
    /// actions</summary>
    procedure VisibleChanged; virtual;
    /// <summary>Returns True if the control rect is empty.</summary>
    function IsControlRectEmpty: Boolean; virtual;
    function GetControls: TControlList;
    procedure DoGesture(const EventInfo: TGestureEventInfo; var Handled: Boolean); virtual;
    function GetTabStopController: ITabStopController; virtual;
    function GetTabListClass: TTabListClass; virtual;
    property DoubleClick: Boolean read FDoubleClick;
    { IRotatedControl }
    property RotationAngle: Single read GetRotationAngle write SetRotationAngle;
    property RotationCenter: TPosition read GetRotationCenter write SetRotationCenter;
    property Scale: TPosition read GetScale write SetScale;
    property DisabledOpacity: Single read FDisabledOpacity write SetDisabledOpacity stored DisabledOpacityStored nodefault;
    property ParentContent: IContent read FParentContent;
    property ParentContentObserver: IContentObserver read FParentContentObserver;
    /// <summary>If the control has ShowHint to false, this property is used to see if a hint can be displayed.</summary>
    property ParentShowHint: Boolean read FParentShowHint write SetParentShowHint default True;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure SetNewScene(AScene: IScene); virtual;
    procedure SetBounds(X, Y, AWidth, AHeight: Single); virtual;
    {$REGION 'Converting Between Coordinate Systems'}
    /// <summary>Converts <c>Point</c> in absolute coordinate system to local coordinate system of control.</summary>
    function AbsoluteToLocal(const APoint: TPointF): TPointF; overload; virtual;
    /// <summary>Converts <c>ARect</c> in absolute coordinate system to local coordinate system of control.</summary>
    function AbsoluteToLocal(const ARect: TRectF): TRectF; overload;
    /// <summary>Converts <c>Point</c> in local coordinate system of control to absolute coordinate system.</summary>
    function LocalToAbsolute(const APoint: TPointF): TPointF; overload; virtual;
    /// <summary>Converts <c>ARect</c> in local coordinate system of control to absolute coordinate system.</summary>
    function LocalToAbsolute(const ARect: TRectF): TRectF; overload;
    /// <summary>Converts a point from the screen coordinate system to the scene coordinate system.</summary>
    function ScreenToLocal(const AScreenPoint: TPointF): TPointF; virtual;
    /// <summary>Converts a point from the scene coordinate system to the screen coordinate system.</summary>
    function LocalToScreen(const ALocalPoint: TPointF): TPointF; virtual;
    /// <summary>Converts a point from the coordinate system of a given <c>AControl</c> to that of the control.</summary>
    function ConvertLocalPointFrom(const AControl: TControl; const AControlLocalPoint: TPointF): TPointF;
    /// <summary>Converts a point from the control's coordinate system to that of the specified control <c>AControl</c>.</summary>
    function ConvertLocalPointTo(const AControl: TControl; const ALocalPoint: TPointF): TPointF;
    function AbsoluteToLocalVector(Vector: TVector): TVector; virtual;
    function LocalToAbsoluteVector(Vector: TVector): TVector; virtual;
    {$ENDREGION}
    { hit test }
    function PointInObject(X, Y: Single): Boolean; virtual;
    function PointInObjectLocal(X, Y: Single): Boolean; virtual;
    { drag and drop }
    function MakeScreenshot: TBitmap;
    { align }
    procedure BeginUpdate; virtual;
    function IsUpdating: Boolean; virtual;
    procedure EndUpdate; virtual;
    { IFlipContainer }
    procedure FlipChildren(const AAllLevels: Boolean);
    { optimizations }
    procedure RecalcAbsoluteNow;
    procedure RecalcUpdateRect; virtual;
    procedure RecalcOpacity; virtual;
    procedure RecalcAbsolute; virtual;
    procedure RecalcEnabled; virtual;
    procedure RecalcHasEffect; virtual;
    procedure RecalcHasClipParent; virtual;
    procedure PrepareForPaint; virtual;
    procedure RecalcSize; virtual;
    { effects }
    procedure UpdateEffects;
    { ITriggerEffect }
    procedure ApplyTriggerEffect(const AInstance: TFmxObject; const ATrigger: string); virtual;
    { ITriggerAnimation }
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string); virtual;
    procedure StartTriggerAnimationWait(const AInstance: TFmxObject; const ATrigger: string); virtual;
    { Focus }
    procedure SetFocus;
    procedure ResetFocus;
    /// <summary>Paints current hierarchy of controls on the specified <c>ACanvas</c> in area <c>ARect</c>. <c>ARect</c>
    /// uses logical coordinate system.</summary>
    procedure PaintTo(const ACanvas: TCanvas; const ARect: TRectF; const AParent: TFmxObject = nil);
    procedure Repaint;
    procedure InvalidateRect(ARect: TRectF);
    procedure Lock;
    property AbsoluteMatrix: TMatrix read GetAbsoluteMatrix;
    property AbsoluteOpacity: Single read GetAbsoluteOpacity;
    property AbsoluteWidth: Single read GetAbsoluteWidth;
    property AbsoluteHeight: Single read GetAbsoluteHeight;
    property AbsoluteScale: TPointF read GetAbsoluteScale;
    property AbsoluteEnabled: Boolean read GetAbsoluteEnabled;
    property AbsoluteRect: TRectF read GetAbsoluteRect;
    /// <summary> The absolute rectangle of control after clipping by all its parent controls </summary>
    property AbsoluteClipRect: TRectF read GetAbsoluteClipRect;
    property AxisAlignedRect: TRectF read GetAxisAlignedRect;
    /// <summary>Flag property indicates when control in applying effect state.</summary>
    property ApplyingEffect: Boolean read FApplyingEffect;
    property HasEffect: Boolean read GetAbsoluteHasEffect;
    property HasDisablePaintEffect: Boolean read GetAbsoluteHasDisablePaintEffect;
    property HasAfterPaintEffect: Boolean read GetAbsoluteHasAfterPaintEffect;
    property HasClipParent: TControl read GetHasClipParent;
    property ChildrenRect: TRectF read GetChildrenRect;
    property DefaultSize: TSizeF read GetDefaultSize;
    property FixedSize: TSize read FFixedSize write FFixedSize;
    property InvertAbsoluteMatrix: TMatrix read GetInvertAbsoluteMatrix;
    property InPaintTo: Boolean read FInPaintTo;
    property LocalRect: TRectF read GetLocalRect;
    property Pressed: Boolean read FPressed write FPressed;
    ///<summary>Point when MouseDown is called</summary>
    property PressedPosition: TPointF read FPressedPosition write FPressedPosition;
    property UpdateRect: TRectF read GetUpdateRect;
    property BoundsRect: TRectF read GetBoundsRect write SetBoundsRect;
    {$WARN SYMBOL_DEPRECATED OFF}
    property ParentedRect: TRectF read GetParentedRect;
    {$WARN SYMBOL_DEPRECATED DEFAULT}
    property ParentedVisible: Boolean read GetParentedVisible;
    property ClipRect: TRectF read GetClipRect;
    property Canvas: TCanvas read GetCanvas;
    property Controls: TControlList read GetControls;
    property ControlsCount: Integer read GetControlsCount;
    property ParentControl: TControl read FParentControl;
    property Scene: IScene read FScene;
    property AutoCapture: Boolean read FAutoCapture write FAutoCapture default False;
    property CanFocus: Boolean read FCanFocus write FCanFocus default False;
    property CanParentFocus: Boolean read FCanParentFocus write FCanParentFocus default False;
    property DisableFocusEffect: Boolean read FDisableFocusEffect write FDisableFocusEffect default False;
    property IsInflated: Boolean read FInflated;
    procedure EnumControls(const Proc: TFunc<TControl, TEnumControlsResult>); overload;
    function EnumControls(Proc: TEnumControlsRef; const VisibleOnly: Boolean = True): Boolean; overload;
      deprecated 'Use another version of EnumControls';
    { ITabStopController }
    function GetTabList: ITabList; virtual;
    function ShowInDesigner: Boolean; virtual;
    /// <summary>False if the control should be ignored in ObjectAtPoint, normally same as Visible.
    /// TFrame overrides it to allow itself to be painted in design time regardless of its Visible value.</summary>
    function ShouldTestMouseHits: Boolean; virtual;
    { triggers }
    property IsMouseOver: Boolean read FIsMouseOver;
    property IsDragOver: Boolean read FIsDragOver;
    property IsFocused: Boolean read GetIsFocused;
    property IsVisible: Boolean read FVisible;
    property Align: TAlignLayout read FAlign write SetAlign default TAlignLayout.None;
    property Anchors: TAnchors read FAnchors write SetAnchors stored IsAnchorsStored nodefault;
    property Cursor: TCursor read GetCursor write SetCursor default crDefault;
    property InheritedCursor: TCursor read GetInheritedCursor default crDefault;
    property DragMode: TDragMode read GetDragMode write SetDragMode default TDragMode.dmManual;
    property EnableDragHighlight: Boolean read FEnableDragHighlight write FEnableDragHighlight default True;
    property Enabled: Boolean read FEnabled write SetEnabled stored EnabledStored default True;
    property Position: TPosition read FPosition write SetPosition stored IsPositionStored;
    property Locked: Boolean read FLocked write SetLocked default False;
    property Width: Single read GetWidth write SetWidth stored False nodefault;
    property Height: Single read GetHeight write SetHeight stored False nodefault;
    property Size: TControlSize read FSize write SetSize stored IsSizeStored nodefault;
    property Padding: TBounds read GetPadding write SetPadding;
    property Margins: TBounds read GetMargins write SetMargins;
    property Opacity: Single read FOpacity write SetOpacity stored IsOpacityStored nodefault;
    property ClipChildren: Boolean read FClipChildren write SetClipChildren default False;
    property ClipParent: Boolean read FClipParent write FClipParent default False;
    property HitTest: Boolean read FHitTest write SetHitTest default True;
    property PopupMenu: TCustomPopupMenu read FPopupMenu write SetPopupMenu stored IsPopupMenuStored;
    property TabOrder: TTabOrder read GetTabOrder write SetTabOrder default -1;
    property Visible: Boolean read FVisible write SetVisible stored VisibleStored default True;
    property CustomSceneAddRect: TCustomSceneAddRectEvent read FCustomSceneAddRect write FCustomSceneAddRect;
    property OnDragEnter: TDragEnterEvent read FOnDragEnter write FOnDragEnter;
    property OnDragLeave: TNotifyEvent read FOnDragLeave write FOnDragLeave;
    property OnDragOver: TDragOverEvent read FOnDragOver write FOnDragOver;
    property OnDragDrop: TDragDropEvent read FOnDragDrop write FOnDragDrop;
    property OnDragEnd: TNotifyEvent read FOnDragEnd write FOnDragEnd;
    property OnKeyDown: TKeyEvent read FOnKeyDown write FOnKeyDown;
    property OnKeyUp: TKeyEvent read FOnKeyUp write FOnKeyUp;
    property OnClick: TNotifyEvent read FOnClick write SetOnClick stored OnClickStored;
    property OnDblClick: TNotifyEvent read FOnDblClick write FOnDblClick;
    property OnCanFocus: TCanFocusEvent read FOnCanFocus write FOnCanFocus;
    property OnEnter: TNotifyEvent read FOnEnter write FOnEnter;
    property OnExit: TNotifyEvent read FOnExit write FOnExit;
    property OnMouseDown: TMouseEvent read FOnMouseDown write FOnMouseDown;
    property OnMouseMove: TMouseMoveEvent read FOnMouseMove write FOnMouseMove;
    property OnMouseUp: TMouseEvent read FOnMouseUp write FOnMouseUp;
    property OnMouseWheel: TMouseWheelEvent read FOnMouseWheel write FOnMouseWheel;
    property OnMouseEnter: TNotifyEvent read FOnMouseEnter write FOnMouseEnter;
    property OnMouseLeave: TNotifyEvent read FOnMouseLeave write FOnMouseLeave;
    property OnPainting: TOnPaintEvent read FOnPainting write FOnPainting;
    property OnPaint: TOnPaintEvent read FOnPaint write FOnPaint;
    property OnResize: TNotifyEvent read FOnResize write FOnResize;
    property OnResized: TNotifyEvent read FOnResized write FOnResized;
    property OnActivate: TNotifyEvent read FOnActivate write FOnActivate;
    property OnDeactivate: TNotifyEvent read FOnDeactivate write FOnDeactivate;
    property OnApplyStyleLookup: TNotifyEvent read FOnApplyStyle write FOnApplyStyle;
    property OnFreeStyle: TNotifyEvent read FOnFreeStyle write FOnFreeStyle;
    property TouchTargetExpansion: TBounds read FTouchTargetExpansion write SetTouchTargetExpansion;
    property TabStop: Boolean read GetTabStop write SetTabStop default True;
    property DisableDisappear: Boolean read GetDisableDisappear write SetDisableDisappear;
    /// <summary>If this property is true, the control will display its hint.</summary>
    property ShowHint: Boolean read FShowHint write SetShowHint stored IsShowHintStored;
    /// <summary>Hint string to display if the mouse hovers the control.</summary>
    property Hint: string read FHint write SetHint stored HintStored;
  published
    property Touch: TTouchManager read GetTouchManager write SetTouchManager;
    property OnGesture: TGestureEvent read FOnGesture write FOnGesture;
    property OnTap: TTapEvent read FOnTap write FOnTap;
  end;

  IDrawableObject = interface
  ['{C86EEAD8-69BF-4FDF-9FEE-A2F65E0EB3F0}']
    procedure DrawToCanvas(const Canvas: TCanvas; const ARect: TRectF; const AOpacity: Single = 1.0);
  end;

  ITintedObject = interface
  ['{42D829B7-6D86-41CC-86D5-F92C1FCAB060}']
    function GetCanBeTinted: Boolean;
    procedure SetTintColor(const ATintColor: TAlphaColor);
    property CanBeTinted: Boolean read GetCanBeTinted;
    property TintColor: TAlphaColor write SetTintColor;
  end;

  TOrientation = (Horizontal, Vertical);
  /// <summary> Determines the current state of the style
  /// <para> Unapplied - The style was successfully freed, or was not applied yet </para>
  /// <para> Freeing - At the moment the style is being freed
  /// See <see cref="FMX.Controls|TStyledControl.FreeStyle">FreeStyle</see> </para>
  /// <para> Applying - At the moment the style is being applied
  /// See <see cref="FMX.Controls|TStyledControl.ApplyStyle">ApplyStyle</see> </para>
  /// <para> Error - an exception was raised during applying or freeing the style </para>
  /// <para> Applied - The style was successfully applied </para>
  /// </summary>
  TStyleState = (Unapplied, Freeing, Applying, Error, Applied);

{ TStyledControl }

  TStyledControl = class(TControl)
  public const
    StyleSuffix = 'style';
  strict private class var
    FLoadableStyle: TFmxObject;
  strict private
    FStylesData: TDictionary<string, TValue>;
    FResourceLink: TFmxObject;
    FAdjustType: TAdjustType;
    FAdjustSizeValue: TSizeF;
    FStyleLookup: string;
    FIsNeedStyleLookup: Boolean;
    FAutoTranslate: Boolean;
    FHelpType: THelpType;
    FHelpKeyword: string;
    FHelpContext: THelpContext;
    FStyleState: TStyleState;
    function GetStyleData(const Index: string): TValue;
    procedure SetStyleData(const Index: string; const Value: TValue);
    procedure SetStyleLookup(const Value: string);
    procedure ScaleChangedHandler(const Sender: TObject; const Msg: System.Messaging.TMessage);
    procedure StyleChangedHandler(const Sender: TObject; const Msg : TMessage);
  private
    procedure InternalApplyStyle(const StyleObject: TFmxObject);
    procedure InternalFreeStyle;
  protected
    function SearchInto: Boolean; override;
    function GetBackIndex: Integer; override;
    function IsHelpContextStored: Boolean;
    procedure SetHelpContext(const Value: THelpContext);
    procedure SetHelpKeyword(const Value: string);
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
    function DoSetSize(const ASize: TControlSize; const NewPlatformDefault: Boolean; ANewWidth, ANewHeight: Single;
       var ALastWidth, ALastHeight: Single): Boolean; override;
    procedure DoApplyStyleLookup; virtual;
    procedure DoFreeStyle; virtual;
    { Styles Data }
    procedure StyleDataChanged(const Index: string; const Value: TValue); virtual;
    function RequestStyleData(const Index: string): TValue; virtual;
    { control }
    procedure Painting; override;
    procedure ApplyStyle; virtual;
    procedure FreeStyle; virtual;
    function CanFlipChild(const AChild: TFmxObject): Boolean; override;
    /// <summary>Return Context for behavior manager.</summary>
    function GetStyleContext: TFmxObject; virtual;
    function GetDefaultStyleLookupName: string; virtual;
    /// <summary>Getter for ParentClassStyleLookupName property. Return default StyleLookup name for parent class.
    /// Used when style is loading.</summary>
    function GetParentClassStyleLookupName: string; virtual;
    procedure DoEnter; override;
    procedure Disappear; override;
    procedure AdjustSize; virtual;
    procedure AdjustFixedSize(const ReferenceControl: TControl); virtual;
    /// <summary>Select fixed size adjust type based on FixedSize in ResourceLink</summary>
    function ChooseAdjustType(const FixedSize: TSize): TAdjustType; virtual;
    procedure DoStyleChanged; virtual;
    procedure StyleLookupChanged; virtual;
    procedure RecycleResourceLink;
    procedure KillResourceLink;
    procedure DoDeleteChildren; override;
    /// <summary>Generate style lookup name based on AClassName string.</summary>
    function GenerateStyleName(const AClassName: string): string;
    function GetStyleObject: TFmxObject; overload; virtual;
    function GetStyleObject(const Clone: Boolean): TFmxObject; overload; virtual;
    procedure SetAdjustSizeValue(const Value: TSizeF); virtual;
    procedure SetAdjustType(const Value: TAdjustType); virtual;
    /// <summary>Gets style resource for this control as TFmxObject</summary>
    function GetResourceLink: TFmxObject; virtual;
    /// <summary>Gets style resource for this control as TControl</summary>
    function GetResourceControl: TControl;
    property IsNeedStyleLookup: Boolean read FIsNeedStyleLookup;
    property ResourceLink: TFmxObject read GetResourceLink;
    property ResourceControl: TControl read GetResourceControl;
    { IAlignableObject }
    function GetAdjustSizeValue: TSizeF; override;
    function GetAdjustType: TAdjustType; override;
  public
    constructor Create(AOwner: TComponent); overload; override;
    procedure BeforeDestruction; override;
    destructor Destroy; override;
    property AdjustType: TAdjustType read GetAdjustType;
    property AdjustSizeValue: TSizeF read GetAdjustSizeValue;
    /// <summary> This property allows you to define the current state of style. It is changed when calling virtual
    /// methods <see cref="FMX.Controls|TStyledControl.FreeStyle">FreeStyle</see>,
    /// <see cref="FMX.Controls|TStyledControl.ApplyStyle">ApplyStyle</see>,
    /// <see cref="FMX.Controls|TStyledControl.DoApplyStyleLookup">DoApplyStyleLookup</see>
    /// </summary>
    property StyleState: TStyleState read FStyleState;
    procedure RecalcSize; override;
    function FindStyleResource(const AStyleLookup: string; const Clone: Boolean = False): TFmxObject; overload; override;
    /// <summary>Try find resource of specified type T by name <c>AStyleLookup</c>. If resource is not of type T or
    /// is not found, it returns false and doesn't change value of <c>AResource</c> param</summary>
    function FindStyleResource<T: TFmxObject>(const AStyleLookup: string; var AResource: T): Boolean; overload;
    /// <summary>Try find resource of specified type T by name <c>AStyleLookup</c> and makes a copy of original resource.
    /// If resource is not of type T, it returns nil</summary>
    function FindAndCloneStyleResource<T: TFmxObject>(const AStyleLookup: string; var AResource: T): Boolean;
    procedure SetNewScene(AScene: IScene); override;
    procedure ApplyStyleLookup; virtual;
    procedure NeedStyleLookup; virtual;
    procedure Inflate; virtual;
    procedure PrepareForPaint; override;
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string); override;
    procedure StartTriggerAnimationWait(const AInstance: TFmxObject; const ATrigger: string); override;
    property AutoTranslate: Boolean read FAutoTranslate write FAutoTranslate;
    property DefaultStyleLookupName: string read GetDefaultStyleLookupName;
    /// <summary>Return default StyleLookup name for parent class</summary>
    property ParentClassStyleLookupName: string read GetParentClassStyleLookupName;
    property HelpType: THelpType read FHelpType write FHelpType default htContext;
    property HelpKeyword: string read FHelpKeyword write SetHelpKeyword stored IsHelpContextStored;
    property HelpContext: THelpContext read FHelpContext write SetHelpContext stored IsHelpContextStored default 0;
    property StylesData[const Index: string]: TValue read GetStyleData write SetStyleData;
    property StyleLookup: string read FStyleLookup write SetStyleLookup;
    /// <summary>Style that currently used to load style object</summary>
    class property LoadableStyle: TFmxObject read FLoadableStyle write FLoadableStyle;
    /// <summary>Lookup style object in scene StyleBook, active style and global pool.</summary>
    class function LookupStyleObject(const Instance: TFmxObject; const Context: TFmxObject; const Scene: IScene;
      const StyleLookup, DefaultStyleLookup, ParentClassStyleLookup: string; const Clone: Boolean;
      const UseGlobalPool: Boolean = True): TFmxObject;
  end;

  TStyleChangedMessage = class(TMessage<TStyleBook>)
  private
    FScene: IScene;
  public
    constructor Create(const StyleBook: TStyleBook; const Scene: IScene); overload;
    /// <summary>Scene where the style has been changed, nil if the change is global</summary>
    property Scene: IScene read FScene;
  end;

  TBeforeStyleChangingMessage = class(TMessage)
  end;

{ TStyleContainer }

  TStyleContainer = class(TControl, IBinaryStyleContainer)
  private
    FBinaryDict: TDictionary<string, TMemoryStream>;
    function CreateStyleResource(const AStyleLookup: string): TFmxObject;
    { IBinaryStyleContainer }
    procedure ClearContainer;
    procedure UnpackAllBinaries;
    procedure AddBinaryFromStream(const Name: string; const SourceStream: TStream; const Size: Int64);
    procedure AddObjectFromStream(const Name: string; const SourceStream: TStream; const Size: Int64);
    function LoadStyleResource(const AStream: TStream): TFmxObject;
  protected
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function FindStyleResource(const AStyleLookup: string; const Clone: Boolean = False): TFmxObject; override;
  end;

{ TStyleBook }

  /// <summary>Represents an item in an instance of TStyleCollection that holds
  /// a style for a platform.</summary>
  TStyleCollectionItem = class(TCollectionItem)
  public const
    DefaultItem = 'Default';
  private
    [Weak] FStyleBook: TStyleBook;
    FBinary: TMemoryStream;
    FStyle: TFmxObject;
    FPlatform: string;
    FUnsupportedPlatform: Boolean;
    FNeedLoadFromBinary: Boolean;
    procedure SetPlatform(const Value: string);
    procedure SetResource(const Value: string);
    function GetResource: string;
    function GetStyle: TFmxObject;
    procedure ReadResources(Stream: TStream);
    procedure WriteResources(Stream: TStream);
    function StyleStored: Boolean;
    function GetIsEmpty: Boolean;
  protected
    procedure DefineProperties(Filer: TFiler); override;
    function GetDisplayName: string; override;
  public
    constructor Create(Collection: TCollection); override;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    /// <summary>Reload style from binary stream</summary>
    procedure LoadFromBinary;
    /// <summary>Save style to binary stream</summary>
    procedure SaveToBinary;
    /// <summary>Clear style and binary stream</summary>
    procedure Clear;
    /// <summary>Return true is style is empty</summary>
    property IsEmpty: Boolean read GetIsEmpty;
    /// <summary>Load style from stream</summary>
    procedure LoadFromStream(const Stream: TStream);
    /// <summary>Load style from file</summary>
    procedure LoadFromFile(const FileName: string);
    /// <summary>Save style to stream</summary>
    procedure SaveToStream(const Stream: TStream; const Format: TStyleFormat = TStyleFormat.Indexed);
    /// <summary>Link to owner StyleBook</summary>
    property StyleBook: TStyleBook read FStyleBook;
    /// <summary>Style that stored on this item</summary>
    property Style: TFmxObject read GetStyle;
    /// <summary>If style can not be load on current platform tihs property is True and Style is empty</summary>
    property UnsupportedPlatform: Boolean read FUnsupportedPlatform;
  published
    /// <summary>Name used to idenity style in collection</summary>
    property Platform: string read FPlatform write SetPlatform;
    /// <summary>Design-time only property used to show Style Designer</summary>
    property Resource: string read GetResource write SetResource stored False;
  end;

  /// <summary>Collection of  items that store styles for different
  /// platforms.</summary>
  TStyleCollection = class(TOwnedCollection)
  private
    [Weak] FStyleBook: TStyleBook;
    function GetItem(Index: Integer): TStyleCollectionItem;
    procedure SetItem(Index: Integer; const Value: TStyleCollectionItem);
  protected
    procedure Notify(Item: TCollectionItem; Action: TCollectionNotification); override;
  public
    constructor Create(AOwner: TPersistent);
    /// <summary>Create and add new item</summary>
    function Add: TStyleCollectionItem;
    /// <summary>Access property for style collection items</summary>
    property Items[Index: Integer]: TStyleCollectionItem read GetItem write SetItem; default;
  end;

  /// <summary>Record type that contains design-time information for the Form
  /// Designer.</summary>
  TStyleBookDesignInfo = record
    /// <summary>ClassName of selected control</summary>
    ClassName: string;
    /// <summary>If True that edit custom style mode is active</summary>
    CustomStyle: Boolean;
    /// <summary>Default StyleLookup for selected control</summary>
    DefaultStyleLookup: string;
    /// <summary>Name of selected control</summary>
    Name: string;
    /// <summary>StyleLookup of selected control</summary>
    StyleLookup: string;
    /// <summary>Selected control itself</summary>
    Control: TStyledControl;
    /// <summary>True if StyleBook just created</summary>
    JustCreated: Boolean;
  end;

  TStyleBook = class(TFmxObject)
  private
    FStyles: TStyleCollection;
    FStylesDic: TDictionary<string, TStyleCollectionItem>;
    FCurrentItemIndex: Integer;
    FFileName: string;
    FDesignInfo: TStyleBookDesignInfo;
    FUseStyleManager: Boolean;
    FBeforeStyleChangingId: TMessageSubscriptionId;
    FStyleChangedId: TMessageSubscriptionId;
    FResource: TStrings;
    procedure SetFileName(const Value: string);
    procedure SetUseStyleManager(const Value: Boolean);
    procedure SetStyles(const Value: TStyleCollection);
    function GetStyle: TFmxObject; overload;
    procedure SetCurrentItemIndex(const Value: Integer);
    procedure BeforeStyleChangingHandler(const Sender: TObject; const Msg: TMessage);
    procedure StyleChangedHandler(const Sender: TObject; const Msg: TMessage);
    function GetCurrentItem: TStyleCollectionItem;
    function GetUnsupportedPlatform: Boolean;
    procedure RebuildDictionary;
    procedure ResourceChanged(Sender: TObject);
    function StyleIndexByContext(const Context: TFmxObject): Integer;
    procedure CollectionChanged;
    procedure ReadStrings(Reader: TReader);
  protected
    /// <summary>Used when looking style in global pool</summary>
    function CustomFindStyleResource(const AStyleLookup: string; const Clone: Boolean): TFmxObject; virtual;
    /// <summary>Choose style depends on context</summary>
    procedure ChooseStyleIndex; virtual;
    /// <summary>Create empty item on demand</summary>
    procedure CreateDefaultItem; virtual;
    procedure Loaded; override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure ReadResources(Stream: TStream);
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    /// <summary>Integration property used with Style Designer</summary>
    property DesignInfo: TStyleBookDesignInfo read FDesignInfo write FDesignInfo;
    /// <summary>Clear style collection</summary>
    procedure Clear;
    /// <summary>Get Style by Context</summary>
    function GetStyle(const Context: TFmxObject): TFmxObject; overload;
    /// <summary>Load style from stream</summary>
    procedure LoadFromStream(const Stream: TStream);
    /// <summary>Load style from file</summary>
    procedure LoadFromFile(const AFileName: string);
    /// <summary>Current Style</summary>
    property Style: TFmxObject read GetStyle;
    /// <summary>Item index of current style in style's collection</summary>
    property CurrentItemIndex: Integer read FCurrentItemIndex write SetCurrentItemIndex;
    /// <summary>Current style in style's collection</summary>
    property CurrentItem: TStyleCollectionItem read GetCurrentItem;
    property Resource: TStrings read FResource;
    /// <summary>If style can not be load on current platform tihs property is True and Style is empty</summary>
    property UnsupportedPlatform: Boolean read GetUnsupportedPlatform;
  published
    /// <summary>Used to load style from file instead of storing style in form resource</summary>
    property FileName: string read FFileName write SetFileName;
    /// <summary>If UseStyleManager is True component use TStyleManager to replace default style for whole application</summary>
    property UseStyleManager: Boolean read FUseStyleManager write SetUseStyleManager default False;
    /// <summary>Collection of styles stored in StyleBook </summary>
    property Styles: TStyleCollection read FStyles write SetStyles;
  end;

  TTextSettingsInfo = class (TPersistent)
  public type
    TBaseTextSettings = class (TTextSettings)
    private
      [Weak] FInfo: TTextSettingsInfo;
      [Weak] FControl: TControl;
    public
      constructor Create(const AOwner: TPersistent); override;
      property Info: TTextSettingsInfo read FInfo;
      property Control: TControl read FControl;
    end;
    TCustomTextSettings = class (TBaseTextSettings)
    public
      constructor Create(const AOwner: TPersistent); override;
      property WordWrap default True;
      property Trimming default TTextTrimming.None;
    end;
    TCustomTextSettingsClass = class of TCustomTextSettings;
    TTextPropLoader = class
    private
      FInstance: TPersistent;
      FFiler: TFiler;
      FITextSettings: ITextSettings;
      FTextSettings: TTextSettings;
    protected
      procedure ReadSet(const Instance: TPersistent; const Reader: TReader; const PropertyName: string);
      procedure ReadEnumeration(const Instance: TPersistent; const Reader: TReader; const PropertyName: string);
      procedure ReadFontFillColor(Reader: TReader);
      procedure ReadFontFamily(Reader: TReader);
      procedure ReadFontFillKind(Reader: TReader);
      procedure ReadFontStyle(Reader: TReader);
      procedure ReadFontSize(Reader: TReader);
      procedure ReadTextAlign(Reader: TReader);
      procedure ReadTrimming(Reader: TReader);
      procedure ReadVertTextAlign(Reader: TReader);
      procedure ReadWordWrap(Reader: TReader);
    public
      constructor Create(const AInstance: TComponent; const AFiler: TFiler);
      procedure ReadProperties; virtual;
      property Instance: TPersistent read FInstance;
      property Filer: TFiler read FFiler;
      property TextSettings: TTextSettings read FTextSettings;
    end;
  private
    FDefaultTextSettings: TTextSettings;
    FTextSettings: TTextSettings;
    FResultingTextSettings: TTextSettings;
    FOldTextSettings: TTextSettings;
    [Weak] FOwner: TPersistent;
    FDesign: Boolean;
    FStyledSettings: TStyledSettings;
    procedure SetDefaultTextSettings(const Value: TTextSettings);
    procedure SetStyledSettings(const Value: TStyledSettings);
    procedure SetTextSettings(const Value: TTextSettings);
    procedure OnDefaultChanged(Sender: TObject);
    procedure OnTextChanged(Sender: TObject);
    procedure OnCalculatedTextSettings(Sender: TObject);
  protected
    procedure RecalculateTextSettings; virtual;
    procedure DoDefaultChanged; virtual;
    procedure DoTextChanged; virtual;
    procedure DoCalculatedTextSettings; virtual;
    procedure DoStyledSettingsChanged; virtual;
  public
    constructor Create(AOwner: TPersistent; ATextSettingsClass: TTextSettingsInfo.TCustomTextSettingsClass); virtual;
    destructor Destroy; override;
    property Design: Boolean read FDesign write FDesign;
    property StyledSettings: TStyledSettings read FStyledSettings write SetStyledSettings;
    property DefaultTextSettings: TTextSettings read FDefaultTextSettings write SetDefaultTextSettings;
    property TextSettings: TTextSettings read FTextSettings write SetTextSettings;
    property ResultingTextSettings: TTextSettings read FResultingTextSettings;
    property Owner: TPersistent read FOwner;
  end;

{ TTextControl }

  TTextControl = class(TStyledControl, ITextSettings, ICaption, IAcceleratorKeyReceiver)
  public const
    DefaultPrefixStyle = TPrefixStyle.HidePrefix;
  private
    FTextSettingsInfo: TTextSettingsInfo;
    FTextObject: TControl;
    FITextSettings: ITextSettings;
    FObjectState: IObjectState;
    FText: string;
    FIsChanging: Boolean;
    FPrefixStyle: TPrefixStyle;
    FAcceleratorKey: Char;
    FAcceleratorKeyIndex: Integer;
    function GetFont: TFont;
    function GetText: string;
    function TextStored: Boolean;
    procedure SetFont(const Value: TFont);
    function GetTextAlign: TTextAlign;
    procedure SetTextAlign(const Value: TTextAlign);
    function GetVertTextAlign: TTextAlign;
    procedure SetVertTextAlign(const Value: TTextAlign);
    function GetWordWrap: Boolean;
    procedure SetWordWrap(const Value: Boolean);
    function GetFontColor: TAlphaColor;
    procedure SetFontColor(const Value: TAlphaColor);
    function GetTrimming: TTextTrimming;
    procedure SetTrimming(const Value: TTextTrimming);
    procedure SetPrefixStyle(const Value: TPrefixStyle);
    { ITextSettings }
    function GetDefaultTextSettings: TTextSettings;
    function GetTextSettings: TTextSettings;
    function GetStyledSettings: TStyledSettings;
    function GetResultingTextSettings: TTextSettings;
  protected
    /// <summary>A TTextControl can respond to an accelerator key, so TControl.DoRootChanging is overriden to register/unregister
    /// this control to/from a form when the control is added to a form, or when this control is moved from a form to another
    /// one.</summary>
    procedure DoRootChanging(const NewRoot: IRoot); override;
    /// <summary>This function is invoked to filter the text that is going to be displayed. This function doesn't modify the string
    /// stored by the control used as Text property.</summary>
    function DoFilterControlText(const AText: string): string; virtual;
    procedure DefineProperties(Filer: TFiler); override;
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    procedure DoStyleChanged; override;
    procedure SetText(const Value: string); virtual;
    procedure SetTextInternal(const Value: string); virtual;
    procedure SetName(const Value: TComponentName); override;
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    procedure Loaded; override;
    function FindTextObject: TFmxObject; virtual;
    procedure UpdateTextObject(const TextControl: TControl; const Str: string);
    property TextObject: TControl read FTextObject;
    procedure DoTextChanged; virtual;
    procedure DoEndUpdate; override;
    function CalcTextObjectSize(const MaxWidth: Single; var Size: TSizeF): Boolean;
    { ITextSettings }
    procedure SetTextSettings(const Value: TTextSettings); virtual;
    procedure SetStyledSettings(const Value: TStyledSettings); virtual;
    procedure DoChanged; virtual;
    function StyledSettingsStored: Boolean; virtual;
    function GetTextSettingsClass: TTextSettingsInfo.TCustomTextSettingsClass; virtual;
    { IAcceleratorKeyReceiver }
    /// <summary>Implements IAcceleratorKeyReceiver.TriggerAcceleratorKey by setting focus to this control.</summary>
    procedure TriggerAcceleratorKey; virtual;
    /// <summary>Implements IAcceleratorKeyReceiver.CanTriggerAcceleratorKey by returning True if this control and all
    /// of its parent controls are visible.</summary>
    function CanTriggerAcceleratorKey: Boolean; virtual;
    /// <summary>Implements IAcceleratorKeyReceiver.GetAcceleratorChar by returning the value stored in FAcceleratorKey.</summary>
    function GetAcceleratorChar: Char;
    /// <summary>Implements IAcceleratorKeyReceiver.GetAcceleratorCharIndex by returning the value stored in
    /// FAcceleratorKeyIndex. This indicates the position within the text string of the accelerator character.</summary>
    function GetAcceleratorCharIndex: Integer;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure AfterConstruction; override;
    function ToString: string; override;

    property Text: string read GetText write SetText stored TextStored;

    property DefaultTextSettings: TTextSettings read GetDefaultTextSettings;
    property TextSettings: TTextSettings read GetTextSettings write SetTextSettings;
    property StyledSettings: TStyledSettings read GetStyledSettings write SetStyledSettings stored StyledSettingsStored nodefault;
    property ResultingTextSettings: TTextSettings read GetResultingTextSettings;

    procedure Change;
    property Font: TFont read GetFont write SetFont;
    property FontColor: TAlphaColor read GetFontColor write SetFontColor default TAlphaColorRec.Black;
    property VertTextAlign: TTextAlign read GetVertTextAlign write SetVertTextAlign default TTextAlign.Center;
    property TextAlign: TTextAlign read GetTextAlign write SetTextAlign default TTextAlign.Leading;
    property WordWrap: Boolean read GetWordWrap write SetWordWrap default False;
    property Trimming: TTextTrimming read GetTrimming write SetTrimming default TTextTrimming.None;
    /// <summary> Determine the way portraying a single character "&amp;" </summary>
    property PrefixStyle: TPrefixStyle read FPrefixStyle write SetPrefixStyle default DefaultPrefixStyle;
  end;

{ TContent }

  TContent = class(TControl, IContent)
  private
    FParentAligning: Boolean;
  protected
    function GetTabStopController: ITabStopController; override;
    procedure DoRealign; override;
    procedure IContent.Changed = ContentChanged;
    procedure ContentChanged; virtual;
  public
    constructor Create(AOwner: TComponent); override;
    function GetTabListClass: TTabListClass; override;
  published
    property Align;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Visible;
    property Width;
    property Size;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TPopup }

  TPlacement = (Bottom, Top, Left, Right, Center, BottomCenter, TopCenter, LeftCenter, RightCenter, Absolute, Mouse, MouseCenter);

  TPopup = class(TStyledControl)
  public const
    DefaultUseParentScale = True;
  private
    [Weak] FSaveParent: TFmxObject;
    FSaveScale: TPointF;
    FPopupForm: TFmxObject;
    FIsOpen: Boolean;
    FStaysOpen: Boolean;
    FPlacement: TPlacement;
    [Weak] FPlacementTarget: TControl;
    FPlacementRectangle: TBounds;
    FHorizontalOffset: Single;
    FVerticalOffset: Single;
    FDragWithParent: Boolean;
    FHideWhenPlacementTargetInvisible: Boolean;
    FClosingAnimation: Boolean;
    FStyleBook: TStyleBook;
    FModalResult: TModalResult;
    FModal: Boolean;
    FBorderWidth: Single;
    FAniDuration: Single;
    FPopupFormSize: TSizeF;
    FPreferedDisplayIndex: Integer;
    FUseParentScale: Boolean;
    FOnClosePopup: TNotifyEvent;
    FOnPopup: TNotifyEvent;
    FOnAniTimer: TNotifyEvent;
    procedure SetIsOpen(const Value: Boolean);
    procedure SetPlacementRectangle(const Value: TBounds);
    procedure SetModalResult(const Value: TModalResult);
    procedure SetPlacementTarget(const Value: TControl);
    procedure SetStyleBook(const Value: TStyleBook);
    procedure SetPlacement(const Value: TPlacement);
    procedure SetDragWithParent(const Value: Boolean);
    procedure SetHideWhenPlacementTargetInvisible(const Value: Boolean);
    procedure SetBorderWidth(const Value: Single);
    procedure BeforeShowProc(Sender: TObject);
    procedure BeforeCloseProc(Sender: TObject);
    procedure CloseProc(Sender: TObject; var Action: TCloseAction);
    procedure SetAniDuration(const Value: Single);
    procedure ReadLeft(Reader: TReader);
    procedure ReadTop(Reader: TReader);
    procedure SetPopupFormSize(const Value: TSizeF);
    procedure UpdatePopupSize;
    procedure SetOnAniTimer(const Value: TNotifyEvent);
    procedure SetUseParentScale(const Value: Boolean);
  protected
    procedure ApplyStyle; override;
    procedure Paint; override;
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure DialogKey(var Key: Word; Shift: TShiftState); override;
    procedure DoClosePopup; virtual;
    procedure DoPopup; virtual;
    procedure RecalculateAbsoluteMatrices; override;
    procedure ClosePopup; virtual;
    function CreatePopupForm: TFmxObject; virtual;
    property PopupForm: TFmxObject read FPopupForm;
    function VisibleStored: Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure Popup(const AShowModal: Boolean = False); virtual;
    function PopupModal: TModalResult; virtual;
    function HasPopupForm: Boolean;
    procedure BringToFront; override;
    property AniDuration: Single read FAniDuration write SetAniDuration;
    property BorderWidth : Single read FBorderWidth write SetBorderWidth;
    property ModalResult: TModalResult read FModalResult write SetModalResult;
    property IsOpen: Boolean read FIsOpen write SetIsOpen;
    property ClosingAnimation: Boolean read FClosingAnimation;
    property PopupFormSize: TSizeF read FPopupFormSize write SetPopupFormSize;
    property PreferedDisplayIndex: Integer read FPreferedDisplayIndex write FPreferedDisplayIndex;
    ///<summary> This event is called periodically (for the AniDuration time) after emergence and before the
    /// disappearance of the pop-up </summary>
    property OnAniTimer: TNotifyEvent read FOnAniTimer write SetOnAniTimer;
  published
    property Align;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property DragWithParent: Boolean read FDragWithParent write SetDragWithParent default False;
    /// <summary>True - if popup form have to be closed, if <c>PlacementTarget</c> is not visible on the screen.</summary>
    /// <remarks>It works only, when <c>PlacementTarget</c> is specified.</remarks>
    property HideWhenPlacementTargetInvisible: Boolean read FHideWhenPlacementTargetInvisible write SetHideWhenPlacementTargetInvisible default True;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property HitTest default True;
    property HorizontalOffset: Single read FHorizontalOffset write FHorizontalOffset;
    /// <summary>
    ///   Whether to take into account the scaling factor of the parent when displaying the pop-up or not?
    /// </summary>
    property UseParentScale: Boolean read FUseParentScale write SetUseParentScale default DefaultUseParentScale;
    property Padding;
    property Opacity;
    property Margins;
    property Placement: TPlacement read FPlacement write SetPlacement default TPlacement.Bottom;
    property PlacementRectangle: TBounds read FPlacementRectangle write SetPlacementRectangle;
    property PlacementTarget: TControl read FPlacementTarget write SetPlacementTarget;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleBook: TStyleBook read FStyleBook write SetStyleBook;
    property StyleLookup;
    property TabOrder;
    property VerticalOffset: Single read FVerticalOffset write FVerticalOffset;
    property Visible stored VisibleStored;
    property Width;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnClosePopup: TNotifyEvent read FOnClosePopup write FOnClosePopup;
    property OnPopup: TNotifyEvent read FOnPopup write FOnPopup;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TPathAnimation }

  TPathAnimation = class(TAnimation)
  private
    FPath: TPathData;
    FPolygon: TPolygon;
    FObj: TControl;
    FStart: TPointF;
    FRotate: Boolean;
    FSpline: TSpline;
    procedure SetPath(const Value: TPathData);
    function EnabledStored: Boolean;
  protected
    procedure ProcessAnimation; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure Start; override;
  published
    property AnimationType default TAnimationType.In;
    property AutoReverse default False;
    property Enabled stored EnabledStored;
    property Delay;
    property Duration nodefault;
    property Interpolation default TInterpolationType.Linear;
    property Inverse default False;
    property Loop default False;
    property OnProcess;
    property OnFinish;
    property Path: TPathData read FPath write SetPath;
    property Rotate: Boolean read FRotate write FRotate default False;
    property Trigger;
    property TriggerInverse;
  end;

  IInflatableContent<T: TStyledControl> = interface
    function GetInflatableItems: TList<T>;
    procedure NotifyInflated;
  end;

  TContentInflater<T: TStyledControl> = class(TInterfacedObject, IInterface)
  strict private
    FInflatable: IInflatableContent<T>;
    FBusy: Boolean;
    procedure ReceiveIdleMessage(const Sender : TObject; const M : System.Messaging.TMessage);
  public
    constructor Create(const Inflatable: IInflatableContent<T>);
    destructor Destroy; override;
    procedure Inflate(Total: Boolean);
  end;

  TControlsFilter<T: TFmxObject> = class(TEnumerableFilter<TControl,T>)
  end;

  ISearchResponder = interface
    ['{C73631F4-5AD7-48b9-92D2-CC808B911B5E}']
    procedure SetFilterPredicate(const Predicate: TPredicate<string>);
  end;

  IListBoxHeaderTrait = interface
    ['{C7BDF195-C1E2-48f9-9376-1382C60A6BCC}']
  end;

procedure CloseAllPopups;
function IsPopup(const Wnd: TFmxObject): Boolean;
function CanClosePopup(const Wnd: TFmxObject): Boolean;
procedure PopupBringToFront;
procedure ClosePopup(const AIndex: Integer); overload;
procedure ClosePopup(Wnd: TFmxObject); overload;

function GetPopup(const AIndex: Integer): TFmxObject;
function GetPopupCount: Integer;

procedure FreeControls;

type
  TPropertyApplyProc = reference to procedure(Instance: TObject; Prop: TRttiProperty);

function FindProperty(var O: TObject; Path: string; const Apply: TPropertyApplyProc): Boolean;

//== INTERFACE END: FMX.Controls
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Memo.Types (from FMX.Memo.Types.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  TInsertOption = FMX.Text.TInsertOption deprecated 'use FMX.Text.TInsertOption instead';
  TInsertOptions = FMX.Text.TInsertOptions deprecated 'use FMX.Text.TInsertOptions instead';

  TDeleteOption = FMX.Text.TDeleteOption deprecated 'use FMX.Text.TDeleteOption instead';
  TDeleteOptions = FMX.Text.TDeleteOptions deprecated 'use FMX.Text.TDeleteOptions instead';

  TActionType = FMX.Text.UndoManager.TActionType deprecated 'use FMX.Text.UndoManager.TActionType instead';
  TFragmentInserted = FMX.Text.UndoManager.TFragmentInserted deprecated 'use FMX.Text.UndoManager.TFragmentInserted instead';
  TFragmentDeleted = FMX.Text.UndoManager.TFragmentDeleted deprecated 'use FMX.Text.UndoManager.TFragmentDeleted instead';

  TSelectionPointType = (Left, Right);

  // Type alias for backward compatibility
  TCaretPosition = FMX.Text.TCaretPosition;

//== INTERFACE END: FMX.Memo.Types
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.ImgList (from FMX.ImgList.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  TMultiResBitmap = class;
  TCustomSourceItem = class;
  TSourceCollection = class;
  TLayer = class;
  TLayers = class;
  TCustomDestinationItem = class;
  TDestinationCollection = class;
  TCustomImageList = class;
  TImageListClass = class of TCustomImageList;
  TSourceItemClass = class of TCustomSourceItem;
  TDestinationItemClass = class of TCustomDestinationItem;
  TLayerClass = class of TLayer;

  /// <summary>A bitmap item in a TMultiResBitmap multi-resolution
  /// bitmap.</summary>
  TBitmapItem = class(TCustomBitmapItem)
  private
    function GetImageList: TCustomImageList;
  public
    /// <summary> A reference to the list of images to whom belongs to an instance of this class </summary>
    property ImageList: TCustomImageList read GetImageList;
    /// <exception>EArgumentException is raised in case Collection is not <b>TMultiResBitmap</b></exception>
    constructor Create(Collection: TCollection); override;
  published
    property Bitmap;
    property Scale;
  end;

  /// <summary> A multi-resolution bitmap is a collection of bitmap which is used in <b>TCustomSourceItem</b> and
  /// <b>TImageList</b></summary>
  TMultiResBitmap = class(TCustomMultiResBitmap)
  private
    [Weak] FSourceItem: TCustomSourceItem;
    function GetImageList: TCustomImageList;
  protected
    function GetDefaultSize: TSize; override;
    procedure Update(Item: TCollectionItem); override;
    procedure Notify(Item: TCollectionItem; Action: TCollectionNotification); override;
  public
    /// <exception>EArgumentException is raised in case AOwner is not <b>TCustomSourceItem</b></exception>
    constructor Create(AOwner: TPersistent; ItemClass: TCustomBitmapItemClass);
    function GetDefaultSizeKind: TSizeKind; override;
    /// <summary> A reference to the item of collection to whom belongs to an instance of this class </summary>
    property SourceItem: TCustomSourceItem read FSourceItem;
    property ImageList: TCustomImageList read GetImageList;
  end;

  /// <summary> The item collection (without published properties) contains the original graphical data, which can be
  /// used to obtain images in the image list <b>TCustomImageList</b>. See <b>TSourceCollection</b> </summary>
  /// <remarks> Note that the data stored in fmx, dfm file, even if they are not used </remarks>
  TCustomSourceItem = class(TCollectionItem)
  public const
    DefaultName = 'Item 0';                  // do not localize
    TemporaryName = 'Tmp_' + DefaultName;    // do not localize
    DefaultDesktopSize = 16;
  private
    [Weak] FSource: TSourceCollection;
    FMultiResBitmap: TMultiResBitmap;
    FOldName: string;
    FName: string;
    procedure SetMultiResBitmap(const Value: TMultiResBitmap);
    procedure SetName(const Value: string);
    function UniqueName(const AName: string; const Collection: TCollection): string;
    procedure CheckName(const Name: string; SourceCollection: TSourceCollection);
  protected
    /// <summary> This virtual method must create a instance of TMultiResBitmap. Override this method if you want to
    /// create <b>MultiResBitmap</b> property of your own type </summary>
    function CreateMultiResBitmap: TMultiResBitmap; virtual;
    procedure SetCollection(Value: TCollection); override;
    function GetDisplayName: string; override;
  public
    /// <exception>EArgumentException is raised in case Collection is not <b>TSourceCollection</b></exception>
    constructor Create(Collection: TCollection); override;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    /// <summary> Collection of identical images are optimized for different scales </summary>
    property MultiResBitmap: TMultiResBitmap read FMultiResBitmap write SetMultiResBitmap;
    /// <summary> The case-insensitive name of the item in the collection. This field cannot be empty and must be
    /// unique for his collection. See also <b>TLayer.Name</b> </summary>
    property Name: string read FName write SetName;
    /// <summary> A reference to the Collection to whom belongs to an instance of this class </summary>
    property Source: TSourceCollection read FSource;
  end;

  /// <summary>Represents an item in a TSourceCollection collection.</summary>
  TSourceItem = class (TCustomSourceItem)
  published
    property MultiResBitmap;
    property Name;
  end;

  /// <summary> The collection that contains original graphical data. See <b>TCustomSourceItem</b> </summary>
  TSourceCollection = class(TOwnedCollection)
  private
    [Weak] FImageList: TCustomImageList;
    function GetItem(Index: Integer): TCustomSourceItem;
    procedure SetItem(Index: Integer; const Value: TCustomSourceItem);
  protected
    procedure Update(Item: TCollectionItem); override;
  public
    /// <exception>EArgumentException is raised in case AOwner is not <b>TCustomImageList</b></exception>
    constructor Create(AOwner: TPersistent; ItemClass: TSourceItemClass);
    property ImageList: TCustomImageList read FImageList;
    property Items[Index: Integer]: TCustomSourceItem read GetItem write SetItem; default;
    function Add: TCustomSourceItem;
    /// <summary> Adds or replaces several files into the collection </summary>
    /// <param name="SourceName"> The name of the collection element. If specified name is not found, a new element will
    /// be created. Otherwise, the found element will be changed. If empty, a new element with default
    /// name will be created
    /// <para> See also <b>TCustomMultiResBitmap.AddOrSet</b></para> </param>
    /// <param name="Scales"> The array that contains the scales of added pictures </param>
    /// <param name="FileNames"> The array that contains the file names of added pictures. <b>Scales</b> and
    /// <b>FileNames</b> must have equal lengths </param>
    /// <param name="TransparentColor"> The color that will be substituted with fully transparent color. If set to
    /// <b>TColors.SysNone</b>, no subsitution will be performed.</param>
    /// <param name="Width"> The width (in pixels) of the added image (at a scale of 1) </param>
    /// <param name="Height"> The height (in pixels) of the added image (at a scale of 1). If Width and Height
    ///  parameters are zero (the default), the width and the height of the image specified by FileNames[0] will be used</param>
    /// <returns> New or updated element of the collection</returns>
    function AddOrSet(const SourceName: string; const Scales: array of Single; const FileNames: array of string;
      const TransparentColor: TColor = TColors.SysNone; const Width: Integer = 0;
      const Height: Integer = 0): TCustomSourceItem;
    /// <summary> This method creates a new item in the collection and inserts before the element with the specified
    /// number </summary>
    function Insert(Index: Integer): TCustomSourceItem;
    /// <summary> Case-insensitive search of item by name</summary>
    /// <returns> if successful then the number of the found item, <c>-1</c> otherwise </returns>
    function IndexOf(const Name: string): Integer;
  end;

  /// <summary> The item of collection <b>TLayers</b>, used in <b>TImageList</b> for obtaining graphical data from
  /// <b>TSourceCollection</b>. See <b>TCustomImageList.Source</b>, <b>TCustomImageList.Destination</b> </summary>
  TLayer = class (TCollectionItem)
  private
    [Weak] FLayers: TLayers;
    [Weak] FMultiResBitmap: TMultiResBitmap;
    FMultiResBitmapIsValid: Boolean;
    FName: string;
    FSourceRect: TBounds;
    procedure SetName(const Value: string);
    function GetImageList: TCustomImageList;
    procedure SetSourceRect(const Value: TBounds);
    function GetMultiResBitmap: TMultiResBitmap;
  protected
    procedure SetCollection(Value: TCollection); override;
    function GetDisplayName: string; override;
  public
    constructor Create(Collection: TCollection); override;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    /// <summary> A reference to the collection to whom belongs to an instance of this class </summary>
    property Layers: TLayers read FLayers;
    property ImageList: TCustomImageList read GetImageList;
    /// <summary> Reference to property <b>MultiResBitmap</b> of found item <b>TCustomImageList.Source</b>. The search
    /// is done by property <b>Name</b>. Can be nil.</summary>
    property MultiResBitmap: TMultiResBitmap read GetMultiResBitmap stored False;
  published
    /// <summary> The case-insensitive name of the item in collection Source </summary>
    property Name: string read FName write SetName;
    /// <summary> The coordinates of the rectangular region in the original image <b>MultiResBitmap</b> that will be used to
    /// obtain the final image. Always specify the coordinates for the scale 1. For other scales, these coordinates will
    /// be automatically recalculated. </summary>
    property SourceRect: TBounds read FSourceRect write SetSourceRect;
  end;

  /// <summary> The collection <b>TLayer</b> items, used in <b>TImageList</b> for obtaining graphical data from
  /// <b>TSourceCollection</b>. See <b>TCustomImageList.Source</b>, <b>TCustomImageList.Destination</b> </summary>
  TLayers = class (TOwnedCollection)
  private
    FDestinationItem: TCustomDestinationItem;
    function GetImageList: TCustomImageList;
    function GetItem(Index: Integer): TLayer;
    procedure SetItem(Index: Integer; const Value: TLayer);
  protected
    procedure Update(Item: TCollectionItem); override;
    procedure Notify(Item: TCollectionItem; Action: TCollectionNotification); override;
  public
    constructor Create(AOwner: TPersistent; ItemClass: TLayerClass);
    /// <summary> A reference to the item to whom belongs to this collection </summary>
    property DestinationItem: TCustomDestinationItem read FDestinationItem;
    /// <summary> A reference to the list of images to whom belongs to this collection </summary>
    property ImageList: TCustomImageList read GetImageList;
    function Add: TLayer;
    function Insert(Index: Integer): TLayer;
    property Items[Index: Integer]: TLayer read GetItem write SetItem; default;
  end;

  /// <summary> The item of collection (without published properties) which contains the data to form the final images
  /// in <b>TImageList</b>. To obtain image, sequentially drawn regions of <b>Source</b> which specified in the
  /// collection <b>Layers</b>. Also performs selection the image with the most appropriate scale for the current scene
  /// and the size of the final image </summary>
  TCustomDestinationItem = class (TCollectionItem)
  public const
    StrDestinationDisplay = '%d (%s)';
  private
    FLayers: TLayers;
    [Weak] FDestination: TDestinationCollection;
    FIsChanged: Boolean;
    procedure SetLayers(const Value: TLayers);
  protected
    /// <summary> This virtual method must create a collection of layers. Override this method if you want to create a
    /// collection of your own type </summary>
    function CreateLayers: TLayers; virtual;
    procedure SetCollection(Value: TCollection); override;
    function GetDisplayName: string; override;
  public
    constructor Create(Collection: TCollection); override;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    /// <summary> The number of <i>not empty</i> items in the <b>Layers</b> collection </summary>
    function LayersCount: Integer;
    /// <summary> This property evaluates to True if there have been some changes, but the notification about redrawing
    /// has not yet been sent </summary>
    property IsChanged: Boolean read FIsChanged;
    /// <summary> The collection that contains references to <b>Source</b> for drawing image. Can be one or more layers
    /// which will drawn sequentially</summary>
    property Layers: TLayers read FLayers write SetLayers;
    /// <summary> A reference to the Collection to whom belongs to this item </summary>
    property Destination: TDestinationCollection read FDestination;
  end;

  /// <summary> The item of collection (with published properties) which contains the data to form the final images
  /// in <b>TImageList</b></summary>
  TDestinationItem = class (TCustomDestinationItem)
  published
    property Layers;
  end;

  /// <summary> The collection which contains the data to form the final images in <b>TImageList</b> </summary>
  TDestinationCollection = class (TOwnedCollection)
  private
    [Weak] FImageList: TCustomImageList;
    function GetItem(Index: Integer): TCustomDestinationItem;
    procedure SetItem(Index: Integer; const Value: TCustomDestinationItem);
  protected
    procedure Update(Item: TCollectionItem); override;
  public
    constructor Create(AOwner: TPersistent; ItemClass: TDestinationItemClass);
    property ImageList: TCustomImageList read FImageList;
    function Add: TCustomDestinationItem;
    function Insert(Index: Integer): TCustomDestinationItem;
    property Items[Index: Integer]: TCustomDestinationItem read GetItem write SetItem; default;
  end;

  /// <summary> List of images. Base class that used in fire monkey without published properties </summary>
  TCustomImageList = class(TBaseImageList)
  private type
    TItemRec = record
      Item: TCustomBitmapItem;
      SourceRect, ItemRect: TRectF;
    end;
  strict private
    FTmpBitmap1: TBitmap;
    FTmpBitmap2: TBitmap;
  private
    FSource: TSourceCollection;
    FDestination: TDestinationCollection;
    FChangedList: TDictionary<Integer, TCustomDestinationItem>;
    FCache: TObject;
    FTimerHandle: TFmxHandle;
    FPlatformTimer: IFMXTimerService;
    FOnChange: TNotifyEvent;
    FOnChanged: TNotifyEvent;
    procedure SetSource(const Value: TSourceCollection);
    procedure SetDestination(const Value: TDestinationCollection);
    procedure SetCacheSize(const Value: Word);
    function GetCacheSize: Word;
    procedure StartTimer;
    procedure StopTimer;
    procedure TimerProc;
    function GetDormant: Boolean;
    procedure SetDormant(const Value: Boolean);
    function GetItemList(const Size: TSize; const Index: Integer): TList<TItemRec>;
    function InvalidateDestination(const Name: string): Boolean;
    function IsIgnoreIndex: Boolean;
  protected
    /// <summary> Creates a <b>Source</b> collection. Override this method if you want to create your own collection
    /// </summary>
    function CreateSource: TSourceCollection; virtual;
    /// <summary> Creates a <b>Destination</b> collection. Override this method if you want to create your own
    /// collection </summary>
    function CreateDestination: TDestinationCollection; virtual;
    procedure DoChange; override;
    /// <summary> This method called after changes and before notification of all instances of TImageLink. This method
    /// is executing event handler of OnChanged </summary>
    procedure DoChanged; virtual;
    procedure Loaded; override;
    /// <summary> This method is createing instance of TBitmap and drawing all <b>Layers</b> </summary>
    /// <param name="Size"> The size of created Bitmap </param>
    /// <param name="Index"> The zero-based number of item in the collection <b>Destination</b> that used for painting
    /// image</param>
    /// <returns> New instance of TBitmap. If the collection isn't contains the item with specified number or the
    /// item does not contain data then it returns zero</returns>
    function DoBitmap(Size: TSize; const Index: Integer): TBitmap; virtual;
    /// <summary> This method is trying find a bitmap in cache. If successful then returns a bitmap otherwise nil </summary>
    function FindInCache(const Size: TSize; const Index: Integer): TBitmap;
    /// <summary> Adding bitmap into end of cache. If the count of images more than CacheSize, then the first
    /// (the oldest) image will removed </summary>
    procedure AddToCache(const Size: TSize; const Index: Integer; const Bitmap: TBitmap);
    function GetCount: Integer; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure BeforeDestruction; override;
    procedure Assign(Source: TPersistent); override;
    /// <summary> Adds or replaces several files in the <b>Source</b> collection, and adds the item to the
    /// <b>Destination</b> collection if it does not exist </summary>
    /// <returns> The number of the new element of <b>Destination</b> or <c>-1</c> if it already exists </returns>
    /// <remarks> See also <b>TSourceCollection.AddOrSet</b></remarks>
    function AddOrSet(const SourceName: string; const Scales: array of Single;
      const FileNames: array of string; const TransparentColor: TColor = TColors.SysNone; const Width: Integer = 0;
      const Height: Integer = 0): TImageIndex;
    /// <summary> Tries to find, in the <b>Source</b> collection, the bitmap item specified by <b>Name</b></summary>
    /// <param name="Name">The name of the item. See <b>TCustomSourceItem.Name</b></param>
    /// <param name="Item">If succed, contains the found bitmap item for scale 1, otherwise is not changed</param>
    /// <param name="Size">If succed, contains the size of the found item, otherwise is not changed</param>
    /// <returns> <c>True</c> if the item is found</returns>
    function BitmapItemByName(const Name: string; var Item: TCustomBitmapItem; var Size: TSize): Boolean;
    /// <summary>Returns the TBitmap object containing the image pointed by <b>Index</b>. Returns <c>nil</c> if the
    /// <b>Index</b> image does not exist.
    /// <para>See also BitmapExists, ClearCache, TBitmap.Assign</para>
    /// <para>The returned bitmap is stored by TCustomImageList in the cache.
    /// Therefore, you must not store references to such bitmaps and must not destroy such bitmaps exolicitly. </para>
    /// </summary>
    function Bitmap(Size: TSizeF; const Index: Integer): TBitmap;
    /// <summary> Returns <c>True</c> if the <b>Index</b> element in the <b>Source</b> collection contains some
    /// graphical data that can be used to create an image </summary>
    function BitmapExists(const Index: Integer): Boolean;
    /// <summary> This method trying to determine the maximum size of layer, which less than input size. If
    /// <b>TLayer.MultiResBitmap</b> has multiple images for different scales, then the search is performed among all
    /// images </summary>
    /// <param name="Index"> The index of item in <b>Destination</b> collection. For this image it determines suitable
    /// size </param>
    /// <param name="Size"> Before executing it contains the original size, after you do this the most suitable size or
    /// source value</param>
    /// <returns> <c>True</c> in case of success, otherwise <c>False</c>. If <c>False</c> then <b>Size</b> does not
    /// change </returns>
    /// <remarks> This method is called from TGlyph if the property <b>Stretch</b> is <c>False</c> </remarks>
    function BestSize(const Index: Integer; var Size: TSize): Boolean; overload;
    function BestSize(const Index: Integer; var Size: TSizeF): Boolean; overload;
    /// <summary> Draws a single picture on the specified canvas </summary>
    ///  <param name="Canvas">The canvas on which will be painted picture</param>
    ///  <param name="Rect">The rectangle in which will be inscribed picture</param>
    ///  <param name="Index">Zero based ordinal number of image</param>
    ///  <param name="Opacity">The transparency of the drawing pictures. By default 1 (completely not transparency)
    /// </param>
    ///  <returns> True if the picture was drawn </returns>
    function Draw(const Canvas: TCanvas; const Rect: TRectF; const Index: Integer; const Opacity: Single = 1): Boolean;
    /// <summary> Helper method for drawing some bitmap. This method used in <b>DoBitmap</b> </summary>
    procedure DrawBitmapToCanvas(const Canvas: TCanvas; const Bitmap: TBitmap; SrcRect, DstRect: TRect;
      const Fast: Boolean = False);
    /// <summary> Removing bitmaps from the internal cache </summary>
    /// <param name="Index">With the default <c>-1</c> value, it removes all bitmaps. Otherwise removes from cache
    /// bitmaps with all sizes but only for the specified <b>Index</b></param>
    procedure ClearCache(const Index: Integer = -1);
    /// <summary> Performs immediate notification about the change of images if there are changes. <para>See also
    /// <b>OnChanged</b>, <b>DoChanged</b>, <b>TImageLink</b>, <b>ImagesChanged</b></para></summary>
    /// <remarks> By default, notifications are sent shortly after the changes. If there are several changes, the count
    /// of notifications isn't increased in order to reduce the number of redrawing of the controls </remarks>
    procedure UpdateImmediately;
    /// <summary> The maximum number of images that can be stored in the cache. If the new image does not fit in the
    /// cache then automatically is deleted the oldest image. If a image has changed, it is automatically removed from
    /// the cache. See ClearCache </summary>
    property CacheSize: Word read GetCacheSize write SetCacheSize;
    /// <summary> Set property <b>Dormant</b> to all items of <b>Source</b>. See TCustomBitmapItem.Dormant </summary>
    property Dormant: Boolean read GetDormant write SetDormant;
    /// <summary> The collection which contains source graphical data. This data used in items of <b>Destination</b> for
    /// produce images. See BitmapItemByName </summary>
    property Source: TSourceCollection read FSource write SetSource;
    /// <summary> The items of this collection contains links to sources. When you specify a certain index of images,
    /// it is formed on the basis of data from this collection. See Bitmap, BitmapExists, Draw </summary>
    property Destination: TDestinationCollection read FDestination write SetDestination;
    /// <summary> If the component isn't in the update state, then event handler is executed immediately after any
    /// change, else after the <b>EndUpdate</b> method. <para>See also <b>DoChange</b>, <b>Change</b></para> </summary>
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    /// <summary> This event handler is invoked shortly after one or more changes were done and before sending the
    /// notification to all of the controls that use the modified image from this image list
    /// <para>See also <b>DoChanged</b>, <b>TImageLink</b></para> </summary>
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
  end;

  /// <summary>FireMonkey image lists are collections of multi-resolution
  /// bitmaps.</summary>
  TImageList = class(TCustomImageList)
  published
    property Source;
    property Destination;
    property OnChange;
    property OnChanged;
  end;

  /// <summary>A TGlyphImageLink object is used to install connection between an
  /// Images image list assigned to the TGlyph control and a component owning
  /// this TGlyph control.</summary>
  TGlyphImageLink = class(TImageLink)
  private
    [Weak] FOwner: TComponent;
    FGlyph: IGlyph;
  public
    ///<summary>Default constructor. If AOwner unsupported IGlyph then raised EArgumentException. If AOwner = nil then
    /// raised EArgumentNilException</summary>
    ///<param name="AOwner">The reference to the control with which it interacts. Can't be nil. Must supported
    /// interface IGlyph</param>
    constructor Create(AOwner: TComponent); reintroduce;
    procedure Change; override;
    /// <summary>Control that was defined at calling constructor <b>Create</b> </summary>
    property Owner: TComponent read FOwner;
    /// <summary>Interface of <b>Owner</b> that was defined at calling constructor <b>Create</b> </summary>
    property Glyph: IGlyph read FGlyph;
  end;

  /// <summary>Each TGlyph control has the Images reference to a
  /// TCustomImageList image list and displays the image identified by the
  /// ImageIndex property. The image is scaled to fully fit into the control
  /// area. TGlyph element is included in most styled controls.</summary>
  TGlyph = class(TControl, IGlyph)
  public const
    DesignBorderColor = $A080D080;
  private
    FImageLink: TImageLink;
    FIsChanging: Boolean;
    FIsChanged: Boolean;
    FAutoHide: Boolean;
    FOnChanged: TNotifyEvent;
    FBitmapExists: Boolean;
    FStretch: Boolean;
    FDisableInterpolation: Boolean;
    function GetImages: TCustomImageList;
    procedure SetImages(const Value: TCustomImageList);
    { IGlyph }
    function GetImageIndex: TImageIndex;
    procedure SetImageIndex(const Value: TImageIndex);
    function GetImageList: TBaseImageList; inline;
    procedure SetImageList(const Value: TBaseImageList);
    function IGlyph.GetImages = GetImageList;
    procedure IGlyph.SetImages = SetImageList;
    procedure SetAutoHide(const Value: Boolean);
    procedure SetStretch(const Value: Boolean);
    procedure SetDisableInterpolation(const Value: Boolean);
  protected
    procedure Paint; override;
    procedure Loaded; override;
    procedure DoEndUpdate; override;
    /// <summary> This vitrual method is calling event <b>OnChanged</b> and method <b>Repaint</b>. <b>DoChanged</b>
    /// method is called in <b>ImagesChanged</b>. You shouldn't call this method manually </summary>
    procedure DoChanged; virtual;
    /// <summary> This method is updating properties <b>BitmapExists</b>, and <b>Visible</b> in case if <b>AutoHide</b>
    /// is true </summary>
    procedure UpdateVisible;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    /// <summary> Determines whether the <b>ImageIndex</b> property needs to be stored in the fmx-file</summary>
    /// <returns> <c>True</c> if the <b>ImageIndex</b> property needs to be stored in the fmx-file</returns>
    function ImageIndexStored: Boolean; virtual;
    /// <summary> Determines whether the <b>Images</b> property needs to be stored in the fmx-file </summary>
    /// <returns> <c>True</c> if the <b>Images</b> property needs to be stored in the fmx-file</returns>
    function ImagesStored: Boolean; virtual;
    procedure SetVisible(const Value: Boolean); override;
    function VisibleStored: Boolean; override;
    function GetDefaultSize: TSizeF; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure AfterConstruction; override;
    /// <summary> Should be called when you change an instance or reference to instance of <b>TBaseImageList</b> or the
    /// <b>ImageIndex</b> property
    /// <para>See also <b>FMX.ActnList.IGlyph</b></para></summary>
    /// <remarks> This method is executed after change list of images. If TGlyph not in state Loading, Destroying,
    /// Updating then this method call <b>DoChanged</b>, otherwise only set property <b>IsChanged</b> to true</remarks>
    procedure ImagesChanged;
    /// <summary> Is <c>True</c> if <b>Images</b> is not <c>nil</c> and <b>ImageIndex</b> points to an existing picture.
    /// <para>See also <b>UpdateVisible</b>, <b>TCustomImageList.BitmapExists</b></para></summary>
    property BitmapExists: Boolean read FBitmapExists;
    /// <summary> If there have been some changes (which needed to paint) but not executed method DoChanged yet, then
    /// this property is set to True, otherwise False</summary>
    property IsChanged: Boolean read FIsChanged write FIsChanged;
  published
    property Action;
    /// <summary> If <c>True</c>, then: at run time <b>Visible</b> property depends only on <b>BitmapExists</b>'s value;
    /// at designtime <b>Visible</b> is always <c>True</c>. Otherwise, <b>Visible</b>'s value can be set
    /// programmatically</summary>
    property AutoHide: Boolean read FAutoHide write SetAutoHide default True;
    property DisableInterpolation: Boolean read FDisableInterpolation write SetDisableInterpolation default False;
    property Enabled;
    property Padding;
    property Margins;
    property Align;
    property Anchors;
    property Position;
    property Width;
    property Height;
    property Opacity;
    property Visible;
    property Size;
    /// <summary> Specifies whether to stretch the image shown in the glyph control </summary>
    property Stretch: Boolean read FStretch write SetStretch default True;
    ///<summary> Zero based index of an image. The default is <c>-1</c>.
    ///<para> See also <b>FMX.ActnList.IGlyph</b></para></summary>
    ///<remarks> If non-existing index is specified, an image is not drawn and no exception is raised</remarks>
    property ImageIndex: TImageIndex read GetImageIndex write SetImageIndex stored ImageIndexStored;
    ///<summary> The list of images. Can be <c>nil</c>. <para>See also <b>FMX.ActnList.IGlyph</b></para></summary>
    property Images: TCustomImageList read GetImages write SetImages stored ImagesStored;
    /// <summary> This event handler is called after some changes in list of images and before painting </summary>
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
    property OnPaint;
    property OnPainting;
  end;

//== INTERFACE END: FMX.ImgList
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Forms (from FMX.Forms.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


const
  // This value indicates that the auto-update action will not be performed.
  ActionUpdateDelayNever: Integer = -1;
  DefaultFormStyleLookup = 'backgroundstyle';

type
  TCommonCustomForm = class;

  { Application }

  TExceptionEvent = procedure(Sender: TObject; E: Exception) of object;
  TIdleEvent = procedure(Sender: TObject; var Done: Boolean) of object;

  TDeviceKind = (Desktop, iPhone, iPad);
  TDeviceKinds = set of TDeviceKind;

  TFormOrientations = TScreenOrientations;
  TFormOrientation = TScreenOrientation;

  TFormFactor = class(TPersistent)
  private
    FSize: TSize;
    FOrientations: TFormOrientations;
    FDevices: TDeviceKinds;
    procedure SetSupportedOrientations(AOrientations: TFormOrientations); virtual;
    procedure SetHeight(const Value: Integer);
    procedure SetWidth(const Value: Integer);
    function GetWidth: Integer;
    function GetHeight: Integer;
  public
    constructor Create;
    procedure AdjustToScreenSize;
  published
    property Width: Integer read GetWidth write SetWidth stored True;
    property Height: Integer read GetHeight write SetHeight stored True;
    property Orientations: TFormOrientations read FOrientations write SetSupportedOrientations stored True
      default [TFormOrientation.Portrait, TFormOrientation.Landscape];
    property Devices: TDeviceKinds read FDevices write FDevices stored True;
  end;

  TApplicationFormFactor = class(TFormFactor)
  protected
    procedure SetSupportedOrientations(AOrientations: TFormOrientations); override;
  end;

{$IFDEF MSWINDOWS}
  /// <summary>IDesignerHook is an interface that allows component writers to
  /// interact with the form designer in the IDE.</summary>
  IDesignerHook = interface(IDesignerNotify)
  ['{65A688CA-60DD-4038-AAFF-8F56A8B6AB69}']
    function IsDesignMsg(Sender: TFmxObject; var Message: Winapi.Messages.TMessage): Boolean;
    procedure UpdateBorder;
    procedure PaintGrid;
    procedure DrawSelectionMarks(AControl: TFMXObject);
    function IsSelected(Instance: TPersistent): Boolean;
    function IsView: Boolean;
    function GetHasFixedSize: Boolean;
    procedure DesignerModified(Activate: Boolean = False);
    procedure ValidateRename(AComponent: TComponent; const CurName, NewName: string);
    function UniqueName(const BaseName: string): string;
    function GetRoot: TComponent;
    procedure FormFamilyChanged(const OldFormFamilyName, NewFormFamilyName, FormClassName: string);
    procedure SelectComponent(Instance: TPersistent);
    /// <summary>Called after the form has been completely painted, so additional painting can be performed on top on it</summary>
    procedure Decorate(Context: TObject);

    property HasFixedSize: Boolean read GetHasFixedSize;
  end;

  /// <summary>Deprecated, only kept for backwards compatibility</summary>
  IDesignerStorage = interface
  ['{ACCC9241-07E2-421B-8F4C-B70D1E4050AE}']
    function GetDesignerMobile: Boolean;
    function GetDesignerWidth: Integer;
    function GetDesignerHeight: Integer;
    function GetDesignerDeviceName: string;
    function GetDesignerOrientation: TFormOrientation;
    function GetDesignerOSVersion: string;
    function GetDesignerMasterStyle: Integer;
    procedure SetDesignerMasterStyle(Value: Integer);

    property Mobile: Boolean read GetDesignerMobile;
    property Width: Integer read GetDesignerWidth;
    property Height: Integer read GetDesignerHeight;
    property DeviceName: string read GetDesignerDeviceName;
    property Orientation: TFormOrientation read GetDesignerOrientation;
    property OSVersion: string read GetDesignerOSVersion;
    property MasterStyle: Integer read GetDesignerMasterStyle write SetDesignerMasterStyle;
  end;
{$ELSE}
  IDesignerHook = interface
  end;
  IDesignerStorage = interface
  end;
{$ENDIF}

  { TApplication }

  TApplicationState = (None, Running, Terminating, Terminated);
  /// <summary>Notification about terminating application</summary>
  TApplicationTerminatingMessage = class(System.Messaging.TMessage);

  TApplicationStateEvent = function: TApplicationState;

  TFormsCreatedMessage = class(System.Messaging.TMessage);
  /// <summary>Notification about showing form</summary>
  TFormBeforeShownMessage = class(System.Messaging.TMessage<TCommonCustomForm>);
  /// <summary>Notification about activating specified form</summary>
  TFormActivateMessage = class(System.Messaging.TMessage<TCommonCustomForm>);
  /// <summary>Notification about deactivating specified form</summary>
  TFormDeactivateMessage = class(System.Messaging.TMessage<TCommonCustomForm>);
  TFormReleasedMessage = class(System.Messaging.TMessage);

  TApplication = class(TComponent)
  private type
    TFormRegistryItem = class
    public
      InstanceClass: TComponentClass;
      Instance: TComponent;
      Reference: Pointer;
    end;
    TFormRegistryItems = TList<TFormRegistryItem>;
    TFormRegistry = TObjectDictionary<String,TFormRegistryItems>;
  private
    FOnException: TExceptionEvent;
    FTerminate: Boolean;
    FOnIdle: TIdleEvent;
    FDefaultTitleReceived: Boolean;
    FDefaultTitle: string;
    FMainForm: TCommonCustomForm;
    FCreateForms: array of TFormRegistryItem;
    FBiDiMode: TBiDiMode;
    FTimerActionHandle: TFmxHandle;
    FActionUpdateDelay: Integer;
    FActionClientsList: TList<TComponent>;
    FOnActionUpdate: TActionEvent;
    FIdleDone: Boolean;
    FIsRealCreateFormsCalled: Boolean;
    FFormFactor: TApplicationFormFactor;
    FFormRegistry: TFormRegistry;
    FMainFormFamily: string;
    FLastKeyPress: TDateTime;
    FLastUserActive: TDateTime;
    FIdleMessage: TIdleMessage;
    FOnActionExecute: TActionEvent;
    FApplicationStateQuery: TApplicationStateEvent;
    FAnalyticsManager: TAnalyticsManager;
    FHint: string;
    FShowHint: Boolean;
    FOnHint: TNotifyEvent;
    FSharedHint: THint;
    FIsControlHint: Boolean;
    FHintShortCuts: Boolean;
    FTimerService: IFMXTimerService;
    procedure Idle;
    procedure DoUpdateActions;
    procedure UpdateActionTimerProc;
    function GetFormRegistryItem(const FormFamily: string; const FormFactor: TFormFactor): TFormRegistryItem;
    function GetDefaultTitle: string;
    function GetTitle: string;
    procedure SetTitle(const Value: string);
    procedure SetMainForm(const Value: TCommonCustomForm);
    function GetAnalyticsManager: TAnalyticsManager;
    procedure SetShowHint(const AValue: Boolean);
    procedure SetHint(const AHint: string);
    procedure SetHintShortCuts(const Value: Boolean);
    function GetTimerService: IFMXTimerService;
    property TimerService: IFMXTimerService read GetTimerService;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure FormDestroyed(const AForm: TCommonCustomForm);
    procedure RealCreateForms;
    procedure CreateForm(const InstanceClass: TComponentClass; var Reference);
    procedure CreateMainForm;
    procedure RegisterFormFamily(const AFormFamily: string; const AForms: array of TComponentClass);
    procedure ProcessMessages;
    property LastKeyPress: TDateTime read FLastKeyPress;
    property LastUserActive: TDateTime read FLastUserActive;
    procedure DoIdle(var Done: Boolean);
    function HandleMessage: Boolean;
    procedure Run;
    function Terminate: Boolean;
    procedure Initialize;
    /// <summary> Perform method <b>TComponent.ExecuteAction</b> for current active control or active form or
    /// <b>Application</b></summary>
    /// <returns> <c>True</c> if the method <b>ExecuteTarget</b> of <b>Action</b> was performed</returns>
    /// <remarks> This method is analogous to the CM_ACTIONEXECUTE handler's in VCL </remarks>
    function ActionExecuteTarget(Action: TBasicAction): Boolean;
    function ExecuteAction(Action: TBasicAction): Boolean; reintroduce;
    function UpdateAction(Action: TBasicAction): Boolean; override;
    ///  <summary>Provides a mechanism for checking if application analytics has been enabled without accessing the
    ///  AnalyticsManager property (which will create an instance of an application manager if one does not already
    ///  exist). Returns True if an instance of TAnalyticsManager is assigned to the application. Returns False
    ///  otherwise.</summary>
    function TrackActivity: Boolean;
    property ActionUpdateDelay: Integer read FActionUpdateDelay write FActionUpdateDelay;
    procedure HandleException(Sender: TObject);
    procedure ShowException(E: Exception);
    /// <summary>Cancels the display of a hint for a control.</summary>
    procedure CancelHint;
    /// <summary>Hides the current hint.</summary>
    procedure HideHint;
    /// <summary>Determines whether Help Hints are enabled or disabled for the entire application.</summary>
    property ShowHint: Boolean read FShowHint write SetShowHint;
    /// <summary>Occurs when the mouse pointer moves over a control or menu item that can display a Help Hint.</summary>
    property OnHint: TNotifyEvent read FOnHint write FOnHint;
    property BiDiMode: TBiDiMode read FBiDiMode write FBiDiMode default bdLeftToRight;
    property Terminated: Boolean read FTerminate write FTerminate;
    property OnIdle: TIdleEvent read FOnIdle write FOnIdle;
    property MainForm: TCommonCustomForm read FMainForm write SetMainForm;
    property Title: string read GetTitle write SetTitle;
    property DefaultTitle: string read GetDefaultTitle;
    property OnActionExecute: TActionEvent read FOnActionExecute write FOnActionExecute;
    property OnActionUpdate: TActionEvent read FOnActionUpdate write FOnActionUpdate;
    property OnException: TExceptionEvent read FOnException write FOnException;
    property ApplicationStateQuery: TApplicationStateEvent read FApplicationStateQuery write FApplicationStateQuery;
    /// <summary>Returns true if RealCreateForms was invoked; otherwise, false.</summary>
    property IsRealCreateFormsCalled: Boolean read FIsRealCreateFormsCalled;

    procedure RegisterActionClient(const ActionClient: TComponent);
    procedure UnregisterActionClient(const ActionClient: TComponent);
    function GetActionClients: TEnumerable<TComponent>;
    function GetDeviceForm(const FormFamily: string; const FormFactor: TFormFactor): TCommonCustomForm; overload;
    function GetDeviceForm(const FormFamily: string): TCommonCustomForm; overload;
    procedure OverrideScreenSize(W, H: Integer);
    property FormFactor: TApplicationFormFactor read FFormFactor;
    /// <summary>Returns an instance of TAnalyticsManager. An instance will be created if one does not already exist.
    /// There should only be one AnalyticsManager per application.</summary>
    property AnalyticsManager: TAnalyticsManager read GetAnalyticsManager;
    /// <summary>Specifies the text string that appears in the Help Hint box.</summary>
    property Hint: string read FHint write SetHint;
    /// <summary>Enables the display of keyboard shortcuts.</summary>
    property HintShortCuts: Boolean read FHintShortCuts write SetHintShortCuts;
  end;

  /// <summary>Links an action object to a client (generic form).</summary>
  TFormActionLink = class(FMX.ActnList.TActionLink)
  private
    FForm: TCommonCustomForm;
    function ActionCustomViewComponent: Boolean;
  protected
    property Form: TCommonCustomForm read FForm;
    procedure AssignClient(AClient: TObject); override;
    function IsCheckedLinked: Boolean; override;
    function IsEnabledLinked: Boolean; override;
    function IsGroupIndexLinked: Boolean; override;
    function IsHelpLinked: Boolean;  override;
    function IsHintLinked: Boolean; override;
    function IsVisibleLinked: Boolean; override;
    function IsOnExecuteLinked: Boolean; override;
    procedure SetVisible(Value: Boolean); override;
  end;

  { Forms }

  TCloseEvent = procedure(Sender: TObject; var Action: TCloseAction) of object;
  TCloseQueryEvent = procedure(Sender: TObject; var CanClose: Boolean) of object;

  TFmxFormBorderStyle = (None, Single, Sizeable, ToolWindow, SizeToolWin);

  TFmxFormState = (Recreating, Modal, Released, InDesigner, WasNotShown, Showing, UpdateBorder, Activation, Closing,
    Engaged);

  TFmxFormStates = set of TFmxFormState;

  TFormPosition = (Designed, Default, DefaultPosOnly, DefaultSizeOnly, ScreenCenter, DesktopCenter, MainFormCenter, OwnerFormCenter);

  IFMXWindowService = interface(IInterface)
    ['{26C42398-9AFC-4D09-9541-9C71E769FC35}']
    function FindForm(const AHandle: TWindowHandle): TCommonCustomForm;
    function CreateWindow(const AForm: TCommonCustomForm): TWindowHandle;
    procedure DestroyWindow(const AForm: TCommonCustomForm);
    procedure ReleaseWindow(const AForm: TCommonCustomForm);
    procedure SetWindowState(const AForm: TCommonCustomForm; const AState: TWindowState);
    procedure ShowWindow(const AForm: TCommonCustomForm);
    procedure HideWindow(const AForm: TCommonCustomForm);
    function ShowWindowModal(const AForm: TCommonCustomForm): TModalResult;
    procedure InvalidateWindowRect(const AForm: TCommonCustomForm; R: TRectF);
    procedure InvalidateImmediately(const AForm: TCommonCustomForm);
    procedure SetWindowRect(const AForm: TCommonCustomForm; ARect: TRectF);
    function GetWindowRect(const AForm: TCommonCustomForm): TRectF;
    function GetClientSize(const AForm: TCommonCustomForm): TPointF;
    procedure SetClientSize(const AForm: TCommonCustomForm; const ASize: TPointF);
    procedure SetWindowCaption(const AForm: TCommonCustomForm; const ACaption: string);
    procedure SetCapture(const AForm: TCommonCustomForm);
    procedure ReleaseCapture(const AForm: TCommonCustomForm);
    function ClientToScreen(const AForm: TCommonCustomForm; const AFormPoint: TPointF): TPointF;
    function ScreenToClient(const AForm: TCommonCustomForm; const AScreenPoint: TPointF): TPointF;
    procedure BringToFront(const AForm: TCommonCustomForm);
    procedure SendToBack(const AForm: TCommonCustomForm);
    procedure Activate(const AForm: TCommonCustomForm);
    function GetWindowScale(const AForm: TCommonCustomForm): Single; deprecated; // Use THandle.Scale instead
    function CanShowModal: Boolean;
  end;

  /// <summary>A service for working with form size constraints.</summary>
  IFMXWindowConstraintsService = interface
  ['{030E519F-3D99-422C-9978-798EA04AF14B}']
    procedure SetConstraints(const AForm: TCommonCustomForm; const AMinWidth, AMinHeight, AMaxWidth, AMaxHeight: Single);
  end;

  IFMXFullScreenWindowService = interface(IInterface)
  ['{103EB4B7-E899-4684-8174-2EEEE24F1E58}']
    procedure SetFullScreen(const AForm: TCommonCustomForm; const AValue: Boolean);
    function GetFullScreen(const AForm: TCommonCustomForm): Boolean;
    procedure SetShowFullScreenIcon(const AForm: TCommonCustomForm; const AValue: Boolean);
  end;

  TWindowBorder = class(TFmxObject)
  private
    [Weak] FForm: TCommonCustomForm;
  protected
    function GetSupported: Boolean; virtual; abstract;
    procedure Resize; virtual; abstract;
    procedure Activate; virtual; abstract;
    procedure Deactivate; virtual; abstract;
    /// <summary>Notifies when form changed style.</summary>
    procedure StyleChanged; virtual; abstract;
    procedure ScaleChanged; virtual; abstract;
    procedure EnableChanged; virtual;
  public
    constructor Create(const AForm: TCommonCustomForm); reintroduce; virtual;
    property Form: TCommonCustomForm read FForm;
    property IsSupported: Boolean read GetSupported;
  end;

  IFMXWindowBorderService = interface(IInterface)
  ['{F3FC3133-CEF0-446F-B3C6-7820989DDFC6}']
    function CreateWindowBorder(const AForm: TCommonCustomForm): TWindowBorder;
  end;

  TFormBorder = class(TPersistent)
  private
    FWindowBorder: TWindowBorder;
    [Weak] FForm: TCommonCustomForm;
    FStyling: Boolean;
    procedure SetStyling(const Value: Boolean);
  protected
    function GetSupported: Boolean;
    procedure Recreate;
    procedure EnableChanged;
  public
    constructor Create(const AForm: TCommonCustomForm);
    destructor Destroy; override;
    procedure StyleChanged;
    procedure ScaleChanged;
    procedure Resize;
    procedure Activate;
    procedure Deactivate;
    property WindowBorder: TWindowBorder read FWindowBorder;
    property IsSupported: Boolean read GetSupported;
  published
    property Styling: Boolean read FStyling write SetStyling default True;
  end;

  TVKStateChangeMessage = class(System.Messaging.TMessage)
  private
    FKeyboardShown: Boolean;
    FBounds: TRect;
  public
    constructor Create(AKeyboardShown: Boolean; const Bounds: TRect);
    property KeyboardVisible: Boolean read FKeyboardShown;
    property KeyboardBounds: TRect read FBounds;
  end;

  TScaleChangedMessage = class(System.Messaging.TMessage<TCommonCustomForm>);
  TMainCaptionChangedMessage = class(System.Messaging.TMessage<TCommonCustomForm>);
  TMainFormChangedMessage = class(System.Messaging.TMessage<TCommonCustomForm>);
  /// <summary>Notification about destoying real form</summary>
  TBeforeDestroyFormHandle = class(System.Messaging.TMessage<TCommonCustomForm>);
  /// <summary>Notification about creating real form</summary>
  TAfterCreateFormHandle = class(System.Messaging.TMessage<TCommonCustomForm>);
  TOrientationChangedMessage = class(System.Messaging.TMessage);
  TSizeChangedMessage = class(System.Messaging.TMessage<TSize>);
  TSaveStateMessage = class(System.Messaging.TMessage);
  /// <summary>Notification about changing focus control.</summary>
  TFormChangingFocusControl = class(System.Messaging.TMessage)
  public
    /// <summary>Previous focused control.</summary>
    [Weak] PreviousFocusedControl: IControl;
    /// <summary>New control, which are going to have focus.</summary>
    [Weak] NewFocusedControl: IControl;
    /// <summary>Does focus changing finished? True - <c>NewFocusedControl</c> received focus, False - otherwise.</summary>
    IsChanged: Boolean;
    constructor Create(const APreviousFocusedControl: IControl; const ANewFocusedControl: IControl; const AIsChanged: Boolean);
  end;

  TFormSaveState = class
  strict private const
    UniqueNameSeparator = '_';
    UniqueNamePrefix = 'FM';
    UniqueNameExtension = '.TMP';
  strict private
    [Weak] FOwner: TCommonCustomForm;
    FStream: TMemoryStream;
    FName: string;
    procedure UpdateFromSaveState;
    function GetStream: TMemoryStream;
    function GenerateUniqueName: string;
  private
    procedure UpdateToSaveState;
    function GetStoragePath: string;
    procedure SetStoragePath(const AValue: string);
  protected
    function GetUniqueName: string;
  public
    constructor Create(const AOwner: TCommonCustomForm);
    destructor Destroy; override;
    property Owner: TCommonCustomForm read FOwner;
    property Stream: TMemoryStream read GetStream;
    property Name: string read FName write FName;
    property StoragePath: string read GetStoragePath write SetStoragePath;
  end;

{ TCommonCustomForm }

  TWindowStyle = (GPUSurface);

  TWindowStyles = set of TWindowStyle;

  /// <summary>Settings of system status bar</summary>
  TFormSystemStatusBar = class(TPersistent)
  public type
    TVisibilityMode = (Visible, Invisible, VisibleAndOverlap);
  public const
    DefaultBackgroundColor = TAlphaColorRec.Null;
    DefaultVisibility = TVisibilityMode.Visible;
  private
    [Weak] FForm: TCommonCustomForm;
    FBackgroundColor: TAlphaColor;
    FVisibility: TVisibilityMode;
    procedure SetBackgroundColor(const Value: TAlphaColor);
    procedure SetVisibility(const Value: TVisibilityMode);
  protected
    procedure AssignTo(Dest: TPersistent); override;
  public
    constructor Create(const AForm: TCommonCustomForm);
  published
    /// <summary>Background color of system status bar</summary>
    property BackgroundColor: TAlphaColor read FBackgroundColor write SetBackgroundColor default DefaultBackgroundColor;
    /// <summary>Different modes of showing system status bar</summary>
    property Visibility: TVisibilityMode read FVisibility write SetVisibility default DefaultVisibility;
  end;

  /// <summary>Service for working with native system status bar</summary>
  IFMXWindowSystemStatusBarService = interface(IInterface)
  ['{06258F45-98C5-4F8F-9A77-01F2BD892A5B}']
    /// <summary>Sets background color of system status bar</summary>
    procedure SetBackgroundColor(const AForm: TCommonCustomForm; const AColor: TAlphaColor);
    /// <summary>Sets how system status bar will be shown. See TVisibilityMode</summary>
    procedure SetVisibility(const AForm: TCommonCustomForm; const AMode: TFormSystemStatusBar.TVisibilityMode);
  end;

  /// <summary>
  ///   The service is designed to position the form on the screen depending on the selected position mode.
  /// </summary>
  /// <remarks>You can use the default implementation, see the class <c>TDefaultFormPositioner</c>.</remarks>
  IFMXFormPositionerService = interface
  ['{7624844E-3F50-4C51-A742-BA1379EB7D5F}']
    procedure PlaceOnScreen(const AForm: TCommonCustomForm; const APosition: TFormPosition);
  end;

  /// <summary>
  ///   The default implementation of <c>IFMXFormPositionerService</c> for all platforms. It uses Density-Independent
  ///   Pixel for calculation positions.
  /// </summary>
  TDefaultFormPositionerService = class(TInterfacedObject, IFMXFormPositionerService)
  protected
    class function FitInRect(const AValue: TRectF; const AMaxRect: TRectF): TRectF;
    function GetOwnerForm(const AForm: TCommonCustomForm): TCommonCustomForm;
    function GetMainForm(const AForm: TCommonCustomForm): TCommonCustomForm;
    function DefineTargetPosition(const AForm: TCommonCustomForm; const APosition: TFormPosition): TFormPosition;
    { Alignment }
    procedure PlaceDesigned(const AForm: TCommonCustomForm); virtual;
    procedure PlaceDefaultPosOnly(const AForm: TCommonCustomForm); virtual;
    procedure PlaceDefaultSizeOnly(const AForm: TCommonCustomForm); virtual;
    procedure PlaceScreenCenter(const AForm: TCommonCustomForm); virtual;
    procedure PlaceDesktopCenter(const AForm: TCommonCustomForm); virtual;
    procedure PlaceMainFormCenter(const AForm: TCommonCustomForm); virtual;
    procedure PlaceOwnerFormCenter(const AForm: TCommonCustomForm); virtual;
  public
    class procedure PlaceByDefault(const AForm: TCommonCustomForm; const APosition: TFormPosition);

    { IFMXFormPositionerService }
    procedure PlaceOnScreen(const AForm: TCommonCustomForm; const APosition: TFormPosition);
  end;

  TConstraintSize = Single;

  TSizeConstraints = class(TPersistent)
  private type
    TDimension = (MaxHeight, MaxWidth, MinHeight, MinWidth);
  private
    FOwner: TComponent;
    FMaxHeight: TConstraintSize;
    FMaxWidth: TConstraintSize;
    FMinHeight: TConstraintSize;
    FMinWidth: TConstraintSize;
    FOnChange: TNotifyEvent;
    procedure SetConstraints(const Index: TDimension; Value: TConstraintSize);
    function GetMaxSize: TSizeF;
    function GetMinSize: TSizeF;
    function IsValueStored(const Index: TDimension): Boolean;
  protected
    procedure Change; virtual;
    procedure AssignTo(Dest: TPersistent); override;
    function GetOwner: TPersistent; override;
  public
    constructor Create(const AOwner: TComponent); virtual;
    property MinSize: TSizeF read GetMinSize;
    property MaxSize: TSizeF read GetMaxSize;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
  published
    property MaxHeight: TConstraintSize index TDimension.MaxHeight read FMaxHeight write SetConstraints stored IsValueStored nodefault;
    property MaxWidth: TConstraintSize index TDimension.MaxWidth read FMaxWidth write SetConstraints stored IsValueStored nodefault;
    property MinHeight: TConstraintSize index TDimension.MinHeight read FMinHeight write SetConstraints stored IsValueStored nodefault;
    property MinWidth: TConstraintSize index TDimension.MinWidth read FMinWidth write SetConstraints stored IsValueStored nodefault;
  end;

  TConstrainedResizeEvent = procedure(Sender: TObject; var MinWidth, MinHeight, MaxWidth, MaxHeight: Single) of object;

  TCommonCustomForm = class(TFmxObject, IRoot, IContainerObject, IAlignRoot, IPaintControl, IStyleBookOwner,
    IDesignerStorage, IOriginalContainerSize, ITabStopController, IGestureControl, IMultiTouch,
    ICaption, IHintRegistry, IFlipContainer)
  private type
    THandleState = (Normal, NeedRecreate, Changed);
    TBoundChange = (Location, Size);
    TBoundChanges = set of TBoundChange;
  private
    FDesigner: IDesignerHook;
    FCaption: string;
    { Size and Position }
    FBounds: TRectF; // dp
    FBoundChanges: TBoundChanges;
    FDefaultWindowRect: TRectF; // dp
    FDefaultClientSize: TSizeF; // dp
    FConstraints: TSizeConstraints; // dp
    FPosition: TFormPosition;
    FTransparency: Boolean;
    FHandle: TWindowHandle;
    FContextHandle: THandle;
    FBorderStyle: TFmxFormBorderStyle;
    FBorderIcons: TBorderIcons;
    FVisible: Boolean;
    FExplicitVisible: Boolean;
    FModalResult: TModalResult;
    FFormState: TFmxFormStates;
    FBiDiMode: TBiDiMode;
    FActive: Boolean;
    FTarget: IControl;
    FHovered, FCaptured, FFocused: IControl;
    FMousePos, FDownPos, FResizeSize, FDownSize: TPointF;
    FDragging, FResizing: Boolean;
    FCursor: TCursor;
    FWindowState: TWindowState;
    FShowFullScreenIcon : Boolean;
    FFullScreen : Boolean;
    FPadding: TBounds;
    FFormFactor : TFormFactor;
    FFormFamily : string;
    FOldActiveForm: TCommonCustomForm;
    FChangingFocusGuard: Boolean;
    FBorder: TFormBorder;
    FStateChangeMessageId: TMessageSubscriptionId;
    FOnClose: TCloseEvent;
    FOnCloseQuery: TCloseQueryEvent;
    FOnActivate: TNotifyEvent;
    FOnDeactivate: TNotifyEvent;
    FOnCreate: TNotifyEvent;
    FOnDestroy: TNotifyEvent;
    FOnResize: TNotifyEvent;
    FOnConstrainedResize: TConstrainedResizeEvent;
    FOnMouseDown: TMouseEvent;
    FOnMouseMove: TMouseMoveEvent;
    FOnMouseUp: TMouseEvent;
    FOnMouseWheel: TMouseWheelEvent;
    FOnKeyDown: TKeyEvent;
    FOnKeyUp: TKeyEvent;
    FOnShow: TNotifyEvent;
    FOnHide: TNotifyEvent;
    FOnFocusChanged: TNotifyEvent;
    FOnVirtualKeyboardShown: TVirtualKeyboardEvent;
    FOnVirtualKeyboardHidden: TVirtualKeyboardEvent;
    FOnTap: TTapEvent;
    FOnTouch: TTouchEvent;
    [Weak] FStyleBook: TStyleBook;
    FScaleChangedId: TMessageSubscriptionId;
    FStyleChangedId: TMessageSubscriptionId;
    FStyleBookChanged: Boolean;
    FPreloadedBorderStyling: Boolean;
    FOriginalContainerSize: TPointF;
    [Weak] FMainMenu: TComponent;
    FMainMenuNative: INativeControl;
    FFormStyle: TFormStyle;
    [Weak] FParentForm: TCommonCustomForm;
    FHandleState: THandleState;
    FGestureRecognizers: array [TInteractiveGesture] of Integer;
    FResultProc: TProc<TModalResult>;
    FTabList: TTabList;
    FTouchManager: TTouchManager;
    FOnGesture: TGestureEvent;
    FOnSaveState: TNotifyEvent;
    FSaveState: TFormSaveState;
    FSaveStateMessageId: TMessageSubscriptionId;
    FEngageCount: Integer;
    FSharedHint: THint;
    FLastHinted: IControl;
    FHintReceiverList: TList<IHintReceiver>;
    FHint: string;
    FShowHint: Boolean;
    FSystemStatusBar: TFormSystemStatusBar;
    {$IFDEF MSWINDOWS}
    FDesignerDeviceName: string;
    FDesignerMasterStyle: Integer;
    function GetDesignerMobile: Boolean;
    function GetDesignerWidth: Integer;
    function GetDesignerHeight: Integer;
    function GetDesignerDeviceName: string;
    function GetDesignerOrientation: TFormOrientation;
    function GetDesignerOSVersion: string;
    function GetDesignerMasterStyle: Integer;
    procedure SetDesignerMasterStyle(Value: Integer);
    {$ENDIF}
    procedure ReadDesignerMobile(Reader: TReader);
    procedure ReadDesignerWidth(Reader: TReader);
    procedure ReadDesignerHeight(Reader: TReader);
    procedure ReadDesignerDeviceName(Reader: TReader);
    procedure ReadDesignerOrientation(Reader: TReader);
    procedure ReadDesignerOSVersion(Reader: TReader);
    procedure ReadDesignerMasterStyle(Reader: TReader);
    procedure WriteDesignerMasterStyle(Writer: TWriter);
    procedure SetDesigner(const ADesigner: IDesignerHook);
    procedure SetLeft(const Value: Integer);
    procedure SetTop(const Value: Integer);
    procedure SetHeight(const Value: Integer);
    function GetHeight: Integer;
    procedure SetWidth(const Value: Integer);
    function GetWidth: Integer;
    procedure SetCaption(const Value: string);
    function GetClientHeight: Integer;
    function GetClientWidth: Integer;
    procedure SetBorderStyle(const Value: TFmxFormBorderStyle);
    procedure SetBorderIcons(const Value: TBorderIcons);
    procedure SetVisible(const Value: Boolean);
    procedure SetClientHeight(const Value: Integer);
    procedure SetClientWidth(const Value: Integer);
    procedure SetBiDiMode(const Value: TBiDiMode);
    procedure SetCursor(const Value: TCursor);
    procedure SetPosition(const Value: TFormPosition);
    procedure SetWindowState(const Value: TWindowState);
    function GetLeft: Integer;
    function GetTop: Integer;
    procedure ShowCaret(const Control: IControl);
    procedure HideCaret(const Control: IControl);
    procedure AdvanceTabFocus(const MoveForward: Boolean);
    procedure SaveStateHandler(const Sender: TObject; const Msg: System.Messaging.TMessage);
    function GetFullScreen: Boolean;
    procedure SetFullScreen(const AValue: Boolean);
    function GetShowFullScreenIcon: Boolean;
    procedure SetShowFullScreenIcon(const AValue: Boolean);
    procedure PreloadProperties;
    procedure SetPadding(const Value: TBounds);
    function GetOriginalContainerSize: TPointF;
    procedure SetBorder(const Value: TFormBorder);
    function FullScreenSupported: Boolean;
    procedure SetFormStyle(const Value: TFormStyle);
    procedure ReadTopMost(Reader: TReader);
    function ParentFormOfIControl(Value: IControl): TCommonCustomForm;
    function CanTransparency: Boolean;
    function CanFormStyle(const NewValue: TFormStyle): TFormStyle;
    procedure ReadShowActivated(Reader: TReader);
    procedure DesignerUpdateBorder;
    procedure ReadStaysOpen(Reader: TReader);
    function SetMainMenu(Value: TComponent): Boolean;
    procedure SetSystemStatusBar(const Value: TFormSystemStatusBar);
    function GetVisible: Boolean;
    procedure SetModalResult(Value: TModalResult);
    procedure CreateTouchManagerIfRequired;
    function GetTouchManager: TTouchManager;
    procedure SetTouchManager(const Value: TTouchManager);
    function GetSaveState: TFormSaveState;
    function SharedHint: THint;
    procedure ReleaseLastHinted;
    procedure SetLastHinted(const AControl: IControl);
    { ICaption }
    procedure ICaption.SetText = SetCaption;
    function GetText: string;
    function ICaption.TextStored = CaptionStore;
    procedure ClearFocusedControl(const IgnoreExceptions: Boolean = False);
    procedure SetFocusedControl(const NewFocused: IControl);
    procedure FocusedControlExited;
    procedure FocusedControlEntered;
    procedure TriggerFormHint;
    procedure TriggerControlHint(const AControl: IControl);
    procedure SetShowHint(const Value: Boolean);
    { interactive gesture recognizers }
    procedure RestoreGesturesRecognizer;
    { Constraints }
    procedure SetConstraints(const Value: TSizeConstraints);
    procedure ConstraintsChanged(Sender: TObject);
  protected
    FActiveControl: IControl;
    FUpdating: Integer;
    FLastWidth, FLastHeight: single;
    FDisableAlign: Boolean;
    FWinService: IFMXWindowService;
    FCursorService: IFMXCursorService;
    FFullScreenWindowService: IFMXFullScreenWindowService;
    procedure ReleaseForm;
    function GetBackIndex: Integer; override;
    procedure InvalidateRect(R: TRectF);
    procedure Recreate; virtual;
    procedure Resize; virtual;
    /// <summary>
    ///   The method is called when form need to apply size constraints. You can overload this method to adjust
    ///   the constraint values.
    /// </summary>
    procedure ConstrainedResize(var AMinWidth, AMinHeight, AMaxWidth, AMaxHeight: Single); virtual;
    procedure AdjustSize(var ASize: TSizeF); virtual;
    procedure SetActive(const Value: Boolean); virtual;
    procedure DefineProperties(Filer: TFiler); override;
    function FindTarget(P: TPointF; const Data: TDragObject): IControl; virtual;
    procedure SetFormFamily(const Value: string);
    procedure UpdateStyleBook; virtual;
    procedure SetStyleBookWithoutUpdate(const StyleBook: TStyleBook);
    procedure ShowInDesigner;
    procedure DoFlipChildren; virtual;
    function CanFlipChild(const AChild: TFmxObject): Boolean; virtual;
    { IInterface }
    function QueryInterface(const IID: TGUID; out Obj): HResult; override;
    { IAlignRoot }
    procedure Realign; virtual;
    procedure ChildrenAlignChanged;
    { Preload }
    procedure AddPreloadPropertyNames(const PropertyNames: TList<string>); virtual;
    procedure SetPreloadProperties(const PropertyStore: TDictionary<string, Variant>); virtual;
    { Handle }
    procedure CreateHandle; virtual;
    procedure DestroyHandle; virtual;
    procedure ResizeHandle; virtual;
    { IRoot }
    function GetObject: TFmxObject;
    function GetActiveControl: IControl;
    procedure SetActiveControl(const AControl: IControl);
    procedure SetCaptured(const Value: IControl);
    function NewFocusedControl(const Value: IControl): IControl;
    procedure SetFocused(const Value: IControl);
    procedure SetHovered(const Value: IControl);
    procedure SetTransparency(const Value: Boolean); virtual;
    function GetCaptured: IControl;
    function GetFocused: IControl;
    function GetBiDiMode: TBiDiMode;
    function GetHovered: IControl;
    procedure BeginInternalDrag(const Source: TObject; const ABitmap: TObject);
    { IStyleBookOwner }
    function GetStyleBook: TStyleBook;
    procedure SetStyleBook(const Value: TStyleBook);
    { IPaintControl }
    procedure PaintRects(const UpdateRects: array of TRectF); virtual;
    function GetContextHandle: THandle;
    procedure SetContextHandle(const AContextHandle: THandle);
    property ContextHandle: THandle read FContextHandle;
    { Border }
    function CreateBorder: TFormBorder; virtual;
    { TFmxObject }
    procedure Loaded; override;
    procedure FreeNotification(AObject: TObject); override;
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    procedure DoDeleteChildren; override;
    procedure Updated; override;
    { TComponent }
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
    procedure ValidateRename(AComponent: TComponent; const CurName, NewName: string); override;
    procedure GetChildren(Proc: TGetChildProc; Root: TComponent); override;
    procedure GetDeltaStreams(Proc: TGetStreamProc); override;
    { IContainerObject }
    function GetContainerWidth: Single;
    function GetContainerHeight: Single;
    procedure UpdateActions; virtual;
    function GetActionLinkClass: TActionLinkClass; override;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    function CaptionStore: boolean;
    procedure VirtualKeyboardChangeHandler(const Sender: TObject; const Msg: System.Messaging.TMessage); virtual;
    procedure IsDialogKey(const Key: Word; const KeyChar: WideChar; const Shift: TShiftState;
                          var IsDialog: Boolean); virtual;
    { Events }
    procedure DoShow; virtual;
    procedure DoHide; virtual;
    procedure DoClose(var CloseAction: TCloseAction); virtual;
    procedure DoScaleChanged; virtual;
    procedure DoStyleChanged; virtual;
    procedure DoMouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); virtual;
    procedure DoMouseMove(Shift: TShiftState; X, Y: Single); virtual;
    procedure DoMouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); virtual;
    procedure DoMouseWheel(Shift: TShiftState; WheelDelta: Integer; var Handled: Boolean); virtual;
    procedure DoFocusChanged; virtual;
    procedure DoPaddingChanged; virtual;
    procedure DoTap(const Point: TPointF); virtual;
    procedure DoKeyDown(var AKeyCode: Word; var AKeyChar: WideChar; const AShiftState: TShiftState); virtual;
    procedure DoKeyUp(var AKeyCode: Word; var AKeyChar: WideChar; const AShiftState: TShiftState); virtual;
    { Window style }
    function GetWindowStyle: TWindowStyles; virtual;
    procedure DoParentFormChanged; virtual;
    procedure DoRootChanged; override;
    property MainMenu: TComponent read FMainMenu;
    procedure DoGesture(const EventInfo: TGestureEventInfo; var Handled: Boolean); virtual;
    { IGestureControl }
    procedure BroadcastGesture(EventInfo: TGestureEventInfo);
    procedure CMGesture(var EventInfo: TGestureEventInfo); virtual;
    function TouchManager: TTouchManager;
    function GetFirstControlWithGesture(AGesture: TInteractiveGesture): TComponent;
    function GetFirstControlWithGestureEngine: TComponent;
    function GetListOfInteractiveGestures: TInteractiveGestures;
    procedure Tap(const Location: TPointF); virtual;
    { IMultiTouch }
    procedure MultiTouch(const Touches: TTouches; const Action: TTouchAction);
    procedure Engage;
    procedure Disengage;
    /// <summary>Handler for event that happend when window's scale factor is changed, for example move window from retina to non-retina screen on OS X.</summary>
    procedure ScaleChangedHandler(const Sender: TObject; const Msg: System.Messaging.TMessage); virtual;
    /// <summary>Style changeing event handler</summary>
    procedure StyleChangedHandler(const Sender: TObject; const Msg: System.Messaging.TMessage); virtual;
    { IHintRegistry }
    procedure TriggerHints;
    procedure RegisterHintReceiver(const AReceiver: IHintReceiver);
    procedure UnregisterHintReceiver(const AReceiver: IHintReceiver);
  public
    constructor Create(AOwner: TComponent); override;
    constructor CreateNew(AOwner: TComponent; Dummy: NativeInt = 0); virtual;
    destructor Destroy; override;
    procedure InitializeNewForm; virtual;
    procedure AfterConstruction; override;
    procedure BeforeDestruction; override;
    { children }
    function ObjectAtPoint(AScreenPoint: TPointF): IControl; virtual;
    procedure CreateChildFormList(Parent: TFmxObject; var List: TList<TCommonCustomForm>);
    {$REGION 'Mouse events'}
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; AFormX, AFormY: Single); virtual;
    procedure MouseMove(Shift: TShiftState; AFormX, AFormY: Single); virtual;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; AFormX, AFormY: Single; DoClick: Boolean = True); virtual;
    procedure MouseWheel(Shift: TShiftState; WheelDelta: Integer; var Handled: Boolean); virtual;
    procedure MouseLeave; virtual;
    procedure MouseCapture;
    procedure ReleaseCapture;
    {$ENDREGION}

    {$REGION 'Keys events'}
    /// <summary>
    ///   Starting the processing of the Key Down event. The method performs full processing and delivery of the event
    ///   to consumers.
    /// </summary>
    procedure KeyDown(var Key: Word; var KeyChar: System.WideChar; Shift: TShiftState); virtual;
    /// <summary>
    ///   Starting the processing of the Key Up event. The method performs full processing and delivery of the event
    ///   to consumers.
    /// </summary>
    procedure KeyUp(var Key: Word; var KeyChar: System.WideChar; Shift: TShiftState); virtual;
    /// <summary>
    ///   Performs accelerator keys processing. If the keys are processed, it returns True and this means that
    ///   no more keys will be processed by the next consumers.
    /// </summary>
    function DispatchAcceleratorKey(const AKey: Word; const AKeyChar: WideChar; const AShift: TShiftState): Boolean; virtual;
    /// <summary>
    ///   Performs dialog keys processing. If the keys are processed, it returns True and this means that
    ///   no more keys will be processed by the next consumers.
    /// </summary>
    function DispatchDialogKey(const AKey: Word; const AKeyChar: WideChar; const AShift: TShiftState): Boolean; virtual;
    {$ENDREGION}

    /// <summary>Force recreating form resources lie Canvas or Context.</summary>
    procedure RecreateResources; virtual;
    procedure HandleNeed; deprecated 'Use HandleNeeded.';
    /// <summary> Requests the form to create its handle at this moment and all associated resources with it.
    /// This replaces HandleNeed method, which has been deprecated. </summary>
    procedure HandleNeeded;
//    function GetImeWindowRect: TRectF; virtual;
    procedure Activate;
    procedure Deactivate;
    procedure DragEnter(const Data: TDragObject; const Point: TPointF); virtual;
    procedure DragOver(const Data: TDragObject; const Point: TPointF; var Operation: TDragOperation); virtual;
    procedure DragDrop(const Data: TDragObject; const Point: TPointF); virtual;
    procedure DragLeave; virtual;
    procedure EnterMenuLoop;
    { manully start }
    procedure StartWindowDrag; virtual;
    procedure StartWindowResize; virtual;
    {interactive gesture recognizers}
    procedure AddRecognizer(const Recognizer: TInteractiveGesture);
    procedure RemoveRecognizer(const Recognizer: TInteractiveGesture);
    function GetRecognizers: TInteractiveGestures;
    { settings }
    procedure SetBounds(ALeft, ATop, AWidth, AHeight: Integer); overload; virtual;
    procedure SetBounds(const ARect: TRect); overload;
    /// <summary>Sets new form frame in DP.</summary>
    procedure SetBoundsF(const ALeft, ATop, AWidth, AHeight: Single); overload; virtual;
    /// <summary>Sets new form frame in DP.</summary>
    procedure SetBoundsF(const ARect: TRectF); overload;
    function GetBounds: TRect; virtual;
    function GetBoundsF: TRectF; virtual;
    function ClientToScreen(const AFormPoint: TPointF): TPointF;
    function ScreenToClient(const AScreenPoint: TPointF): TPointF;
    function CanShow: Boolean; virtual;
    function CloseQuery: Boolean; virtual;
    function ClientRect: TRectF;
    procedure RecreateOsMenu;
    {$WARN SYMBOL_DEPRECATED OFF}
    procedure Release; override; deprecated;
    {$WARN SYMBOL_DEPRECATED DEFAULT}
    /// <summary>Closes the form and returns the actual TCloseAction performed.</summary>
    function Close: TCloseAction;
    procedure Show;
    procedure Hide;
    procedure BringToFront; override;
    procedure SendToBack; override;
    function ShowModal: TModalResult; overload;
    procedure ShowModal(const ResultProc: TProc<TModalResult>); overload;
    /// <summary>Closes a modal form and returns the actual TCloseAction performed.</summary>
    function CloseModal: TCloseAction;
    function IsPopupForm: Boolean; overload; virtual;
    class function IsPopupForm(const AForm: TCommonCustomForm): Boolean; overload;
    procedure Invalidate;
    procedure BeginUpdate; virtual;
    procedure EndUpdate; virtual;
    { ITabStopController }
    function GetTabList: ITabList;
    { IFlipContainer }
    procedure FlipChildren(const AAllLevels: Boolean);
    /// <summary>Returns true if the handle is allocated; otherwise, false. </summary>
    function IsHandleAllocated: Boolean;
    property Handle: TWindowHandle read FHandle;
    property ParentForm: TCommonCustomForm read FParentForm;
    property FormStyle: TFormStyle read FFormStyle write SetFormStyle default TFormStyle.Normal;
    property ModalResult: TModalResult read FModalResult write SetModalResult;
    property FormState: TFmxFormStates read FFormState;
    property Designer: IDesignerHook read FDesigner write SetDesigner;
    property Captured: IControl read FCaptured;
    property Focused: IControl read FFocused write SetFocused;
    property Hovered: IControl read FHovered;
    property Active: Boolean read FActive write SetActive;
    property BiDiMode: TBiDiMode read GetBiDiMode write SetBiDiMode default bdLeftToRight;
    property Caption: string read FCaption write SetCaption stored CaptionStore;
    property Cursor: TCursor read FCursor write SetCursor default crDefault;
    property Border: TFormBorder read FBorder write SetBorder;
    property BorderStyle: TFmxFormBorderStyle read FBorderStyle write SetBorderStyle
      default TFmxFormBorderStyle.Sizeable;
    property BorderIcons: TBorderIcons read FBorderIcons write SetBorderIcons
      default [TBorderIcon.biSystemMenu, TBorderIcon.biMinimize, TBorderIcon.biMaximize];
    /// <summary>Bounds of form - position and size (dp).</summary>
    property Bounds: TRect read GetBounds write SetBounds;
    /// <summary>Bounds of form - position and size (dp).</summary>
    property BoundsF: TRectF read GetBoundsF write SetBoundsF;
    property ClientHeight: Integer read GetClientHeight write SetClientHeight;
    property ClientWidth: Integer read GetClientWidth write SetClientWidth;
    property OriginalContainerSize: TPointF read GetOriginalContainerSize;
    property Padding: TBounds read FPadding write SetPadding;
    property Position: TFormPosition read FPosition write SetPosition default TFormPosition.DefaultPosOnly;
    property StyleBook: TStyleBook read FStyleBook write SetStyleBook;
    /// <summary>Settings of system status bar on mobile platforms</summary>
    property SystemStatusBar: TFormSystemStatusBar read FSystemStatusBar write SetSystemStatusBar;
    property Transparency: Boolean read FTransparency write SetTransparency default False;
    property Width: Integer read GetWidth write SetWidth stored False;
    property Height: Integer read GetHeight write SetHeight stored False;
    property Constraints: TSizeConstraints read FConstraints write SetConstraints;
    property Visible: Boolean read GetVisible write SetVisible default False;
    property WindowState: TWindowState read FWindowState write SetWindowState default TWindowState.wsNormal;
    property WindowStyle: TWindowStyles read GetWindowStyle;
    property FullScreen : Boolean read GetFullScreen write SetFullScreen default False;
    property ShowFullScreenIcon : Boolean read GetShowFullScreenIcon write SetShowFullScreenIcon default True;
    property FormFactor: TFormFactor read FFormFactor write FFormFactor;
    property FormFamily : string read FFormFamily write SetFormFamily;
    property SaveState: TFormSaveState read GetSaveState;
    /// <summary>Determines whether Help Hints are enabled or disabled for the entire application.</summary>
    property ShowHint: Boolean read FShowHint write SetShowHint default True;
    property OnCreate: TNotifyEvent read FOnCreate write FOnCreate;
    property OnDestroy: TNotifyEvent read FOnDestroy write FOnDestroy;
    property OnClose: TCloseEvent read FOnClose write FOnClose;
    property OnCloseQuery: TCloseQueryEvent read FOnCloseQuery write FOnCloseQuery;
    property OnActivate: TNotifyEvent read FOnActivate write FOnActivate;
    property OnDeactivate: TNotifyEvent read FOnDeactivate write FOnDeactivate;
    property OnKeyDown: TKeyEvent read FOnKeyDown write FOnKeyDown;
    property OnKeyUp: TKeyEvent read FOnKeyUp write FOnKeyUp;
    property OnMouseDown: TMouseEvent read FOnMouseDown write FOnMouseDown;
    property OnMouseMove: TMouseMoveEvent read FOnMouseMove write FOnMouseMove;
    property OnMouseUp: TMouseEvent read FOnMouseUp write FOnMouseUp;
    property OnMouseWheel: TMouseWheelEvent read FOnMouseWheel write FOnMouseWheel;
    property OnResize: TNotifyEvent read FOnResize write FOnResize;
    property OnConstrainedResize: TConstrainedResizeEvent read FOnConstrainedResize write FOnConstrainedResize;
    property OnShow: TNotifyEvent read FOnShow write FOnShow;
    property OnHide: TNotifyEvent read FOnHide write FOnHide;
    property OnFocusChanged: TNotifyEvent read FOnFocusChanged write FOnFocusChanged;
    property OnVirtualKeyboardShown: TVirtualKeyboardEvent read FOnVirtualKeyboardShown write FOnVirtualKeyboardShown;
    property OnVirtualKeyboardHidden: TVirtualKeyboardEvent read FOnVirtualKeyboardHidden write FOnVirtualKeyboardHidden;
    property OnSaveState: TNotifyEvent read FOnSaveState write FOnSaveState;
    property Touch: TTouchManager read GetTouchManager write SetTouchManager;
    property OnGesture: TGestureEvent read FOnGesture write FOnGesture;
    property OnTap: TTapEvent read FOnTap write FOnTap;
    property OnTouch: TTouchEvent read FOnTouch write FOnTouch;
  published
    // do not move this
    property Left: Integer read GetLeft write SetLeft;
    property Top: Integer read GetTop write SetTop;
  end;

  { TCustomForm }

  TCustomForm = class(TCommonCustomForm, IScene)
  private
    FCanvas: TCanvas;
    FTempCanvas: TCanvas;
    FFill: TBrush;
    FDrawing: Boolean;
    FUpdateRects: array of TRectF;
    FStyleLookup: string;
    FNeedStyleLookup: Boolean;
    FResourceLink: TFmxObject;
    FOnPaint: TOnPaintEvent;
    FControls: TControlList;
    FQuality: TCanvasQuality;
    FDisableUpdating: Integer;
    procedure SetFill(const Value: TBrush);
    procedure FillChanged(Sender: TObject);
    { IScene }
    function GetCanvas: TCanvas;
    function GetUpdateRectsCount: Integer;
    function GetUpdateRect(const Index: Integer): TRectF;
    function GetSceneScale: Single;
    function LocalToScreen(const P: TPointF): TPointF;
    function ScreenToLocal(const P: TPointF): TPointF;
    procedure SetStyleLookup(const Value: string);
    procedure AddUpdateRect(const R: TRectF);
    procedure DisableUpdating;
    procedure EnableUpdating;
    procedure ChangeScrollingState(const AControl: TControl; const Active: Boolean);
    function IsStyleLookupStored: Boolean;
    function GetActiveHDControl: TControl;
    procedure SetActiveHDControl(const Value: TControl);
    procedure SetQuality(const Value: TCanvasQuality);
    procedure AddUpdateRects(const UpdateRects: array of TRectF);
    procedure PrepareForPaint;
  protected
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    procedure DoDeleteChildren; override;
    procedure ChangeChildren; override;
    procedure UpdateStyleBook; override;
    { TForm }
    function CanFlipChild(const AChild: TFmxObject): Boolean; override;
    procedure ApplyStyleLookup; virtual;
    { Preload }
    procedure AddPreloadPropertyNames(const PropertyNames: TList<string>); override;
    procedure SetPreloadProperties(const PropertyStore: TDictionary<string, Variant>); override;
    { }
    procedure DoPaint(const Canvas: TCanvas; const ARect: TRectF); virtual;
    { resources }
    function GetStyleObject: TFmxObject;
    procedure PaintBackground; virtual;
    { Handle }
    procedure CreateHandle; override;
    procedure DestroyHandle; override;
    procedure ResizeHandle; override;
    procedure PaintRects(const UpdateRects: array of TRectF); override;
    procedure RecreateCanvas;
    { inherited }
    procedure RecalcControlsUpdateRect;
    procedure Realign; override;
    procedure DoScaleChanged; override;
    procedure DoStyleChanged; override;
    { Window style }
    function GetWindowStyle: TWindowStyles; override;
    procedure StyleChangedHandler(const Sender: TObject; const Msg: System.Messaging.TMessage); override;
    property ResourceLink: TFmxObject read FResourceLink;
  public
    constructor Create(AOwner: TComponent); override;
    constructor CreateNew(AOwner: TComponent; Dummy: NativeInt = 0); override;
    destructor Destroy; override;
    procedure InitializeNewForm; override;
    procedure EndUpdate; override;
    procedure PaintTo(const Canvas: TCanvas);
    procedure RecreateResources; override;
    property Action;
    property Canvas: TCanvas read GetCanvas;
    property Fill: TBrush read FFill write SetFill;
    property Quality: TCanvasQuality read FQuality write SetQuality;
    property ActiveControl: TControl read GetActiveHDControl write SetActiveHDControl;
    property StyleLookup: string read FStyleLookup write SetStyleLookup stored IsStyleLookupStored;
    property OnPaint: TOnPaintEvent read FOnPaint write FOnPaint;
  end;

  TCustomPopupForm = class (TCustomForm)
  private type
    TAniState =  (asNone, asShow, asClose);
  private
    FAutoFree: Boolean;
    FPlacement: TPlacement;
    FRealPlacement: TPlacement;
    [Weak] FPlacementTarget: TControl;
    FOffset: TPointF;
    FSize: TSizeF;
    FPlacementRectangle: TBounds;
    FScreenPlacementRect: TRectF;
    FPlacementChanged: Boolean;
    FTimer: TTimer;
    FAniState: TAniState;
    FAniDuration: Single;
    FMaxAniPosition: Single;
    FAniPosition: Single;
    FShowTime: TDateTime;
    FCloseTime: TDateTime;
    FOnAniTimer: TNotifyEvent;
    FFirstShow: Boolean;
    FDragWithParent: Boolean;
    FHideWhenPlacementTargetInvisible: Boolean;
    FBeforeClose: TNotifyEvent;
    FBeforeShow: TNotifyEvent;
    FScreenContentRect: TRectF;
    FContentPadding: TBounds;
    FContentControl: TControl;
    FOnRealPlacementChanged: TNotifyEvent;
    FPreferedDisplayIndex: Integer;
    procedure SetOffset(const Value: TPointF);
    procedure SetSize(const Value: TSizeF);
    procedure SetPlacementRectangle(const Value: TBounds);
    procedure SetPlacement(const Value: TPlacement);
    procedure TimerProc(Sender: TObject);
    procedure SetPlacementTarget(const Value: TControl);
    procedure SetDragWithParent(const Value: Boolean);
    procedure SetContentPadding(const Value: TBounds);
    procedure SetContentControl(const Value: TControl);
    procedure SetPreferedDisplayIndex(const Value: Integer);
  protected
    procedure DoBeforeShow; virtual;
    procedure DoBeforeClose; virtual;
    procedure DoClose(var CloseAction: TCloseAction); override;
    procedure DoPaddingChanged; override;
    procedure DoApplyPlacement; virtual;
    procedure Loaded; override;
    procedure Updated; override;
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
    procedure DoAniTimer; virtual;
    procedure Realign; override;
    procedure DoRealPlacementChanged; virtual;
    function IsVisibleOnScreen(const AControl: TControl): Boolean;
  public
    constructor CreateNew(AOwner: TComponent; Dummy: NativeInt = 0); override;
    constructor Create(AOwner: TComponent; AStyleBook: TStyleBook = nil; APlacementTarget: TControl = nil;
      AutoFree: Boolean = True); reintroduce;
    destructor Destroy; override;
    procedure ApplyPlacement;
    function CanShow: Boolean; override;
    function CloseQuery: Boolean; override;
    property AniDuration: Single read FAniDuration write FAniDuration;
    property AniPosition: Single read FAniPosition;
    property AutoFree: Boolean read FAutoFree;
    property ContentControl: TControl read FContentControl write SetContentControl;
    property ContentPadding: TBounds read FContentPadding write SetContentPadding;
    /// <summary>True - if popup form have to be relocated, when parent changes his position on screen.</summary>
    property DragWithParent: Boolean read FDragWithParent write SetDragWithParent;
    /// <summary>True - if popup form have to be closed, if <c>PlacementTarget</c> is not visible on the screen.</summary>
    /// <remarks>It works only, when <c>PlacementTarget</c> is specified.</remarks>
    property HideWhenPlacementTargetInvisible: Boolean read FHideWhenPlacementTargetInvisible write FHideWhenPlacementTargetInvisible;
    property Offset: TPointF read FOffset write SetOffset;
    property Placement: TPlacement read FPlacement write SetPlacement;
    property PlacementRectangle: TBounds read FPlacementRectangle write SetPlacementRectangle;
    property PlacementTarget: TControl read FPlacementTarget write SetPlacementTarget;
    property PreferedDisplayIndex: Integer read FPreferedDisplayIndex write SetPreferedDisplayIndex;
    property RealPlacement: TPlacement read FRealPlacement;
    property ScreenContentRect: TRectF read FScreenContentRect;
    property ScreenPlacementRect: TRectF read FScreenPlacementRect;
    property Size: TSizeF read FSize write SetSize;
    property OnAniTimer: TNotifyEvent read FOnAniTimer write FOnAniTimer;
    property BeforeShow: TNotifyEvent read FBeforeShow write FBeforeShow;
    property BeforeClose: TNotifyEvent read FBeforeClose write FBeforeClose;
    property OnRealPlacementChanged: TNotifyEvent read FOnRealPlacementChanged write FOnRealPlacementChanged;
  end;

  TForm = class(TCustomForm)
  published
    property Action;
    property ActiveControl;
    property BiDiMode;
    property Border;
    property BorderIcons default [TBorderIcon.biSystemMenu, TBorderIcon.biMinimize, TBorderIcon.biMaximize];
    property BorderStyle default TFmxFormBorderStyle.Sizeable;
    property Caption;
    property ClientHeight;
    property ClientWidth;
    property Cursor default crDefault;
    property Fill;
    property Height;
    property Left;
    property Padding;
    property Position default TFormPosition.DefaultPosOnly;
    property Quality default TCanvasQuality.SystemDefault;
    property SystemStatusBar;
    property StyleBook;
    property StyleLookup;
    property Transparency default False;
    property Top;
    property FormStyle default TFormStyle.Normal;
    property Visible;
    property WindowState default TWindowState.wsNormal;
    property Width;
    property Constraints;
    property FormFactor;
    property FormFamily;
    property FullScreen default False;
    property ShowFullScreenIcon default False;
    property ShowHint;
    {events}
    property OnActivate;
    property OnCreate;
    property OnClose;
    property OnCloseQuery;
    property OnDeactivate;
    property OnDestroy;
    property OnKeyDown;
    property OnKeyUp;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnResize;
    property OnConstrainedResize;
    property OnPaint;
    property OnShow;
    property OnHide;
    property OnFocusChanged;
    property OnVirtualKeyboardShown;
    property OnVirtualKeyboardHidden;
    property Touch;
    property OnGesture;
    property OnSaveState;
    property OnTap;
    property OnTouch;
  end;

  { TFrame }

  TFrame = class(TControl, IControl)
  private
    FInLoaded: Boolean;
  protected
    procedure Paint; override;
    procedure Loaded; override;
    procedure Resize; override;
    procedure DoResized; override;
    function CheckHitTest(const AHitTest: Boolean): Boolean; override;
    { IControl }
    function GetVisible: Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
    procedure AfterConstruction; override;
    procedure GetChildren(Proc: TGetChildProc; Root: TComponent); override;
    function ShouldTestMouseHits: Boolean; override;
  published
    property Action;
    property Align;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Locked default False;
    property Height;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property Visible default True;
    property Width;
    property TabStop;
    property TabOrder;
    property ParentShowHint;
    property ShowHint;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

  { TScreen }

  TScreen = class(TComponent)
  private
    FManagingDataModules: Boolean;
    FForms: TList<Pointer>;
    FDataModules: TList<Pointer>;
    FPopupForms: TList<Pointer>;
    FSaveForm: TCommonCustomForm;
    FMouseSvc: IFMXMouseService;
    FMultiDisplaySvc: IInterface;
    FPopupList: TList<TCommonCustomForm>;
    FClosingPopupList: Boolean;
    procedure AddDataModule(DataModule: TDataModule);
    procedure AddForm(const AForm: TCommonCustomForm);
    function GetForm(Index: Integer): TCommonCustomForm;
    function GetFormCount: Integer;
    procedure RemoveDataModule(DataModule: TDataModule);
    procedure RemoveForm(const AForm: TCommonCustomForm);
    function GetDataModule(Index: Integer): TDataModule;
    function GetDataModuleCount: Integer;
    function GetPopupForms(Index: Integer): TCommonCustomForm;
    function GetPopupFormCount: Integer;
    function GetActiveForm: TCommonCustomForm;
    procedure SetActiveForm(const Value: TCommonCustomForm);
    function GetFocusControl: IControl;
    function GetFocusObject: TFmxObject;
    function GetDesktopRect: TRectF;
    function GetWorkAreaRect: TRectF;
    function GetDisplayCount: Integer;
    function GetDisplay(const Index: Integer): TDisplay;
    function GetDesktopHeight: Single;
    function GetDesktopLeft: Single;
    function GetDesktopTop: Single;
    function GetDesktopWidth: Single;
    function GetWorkAreaHeight: Single;
    function GetWorkAreaLeft: Single;
    function GetWorkAreaTop: Single;
    function GetWorkAreaWidth: Single;
    function GetHeight: Single;
    function GetWidth: Single;
  protected
    property FocusObject: TFmxObject read GetFocusObject;
    procedure CloseFormList(const List: TList<TCommonCustomForm>);
    function CreatePopupList(const SaveForm: TCommonCustomForm): TList<TCommonCustomForm>;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function IndexFormOfObject(const AObject: TFmxObject; const VisibleOnly: Boolean = True): Integer;
    function NextActiveForm(const OldActiveForm: TCommonCustomForm): TCommonCustomForm;
    function MousePos: TPointF;
    /// <summary>The size of primary display.</summary>
    function Size: TSizeF;
    property Height: Single read GetHeight;
    property Width: Single read GetWidth;
    function MultiDisplaySupported: Boolean;
    procedure UpdateDisplayInformation;
    /// <summary> Tries to return a rectangular having the specified Size and positioned in the center of the desktop.
    /// See also IFMXMultiDisplayService.GetDesktopCenterRect </summary>
    function GetDesktopCenterRect(const Size: TSizeF): TRectF;
    property DisplayCount: Integer read GetDisplayCount;
    property Displays[const Index: Integer]: TDisplay read GetDisplay;
    function DisplayFromPoint(const Point: TPoint): TDisplay; overload;
    function DisplayFromPoint(const Point: TPointF): TDisplay; overload;
    function DisplayFromRect(const Rect: TRect): TDisplay; overload;
    function DisplayFromRect(const Rect: TRectF): TDisplay; overload;
    function DisplayFromForm(const Form: TCommonCustomForm): TDisplay; overload;
    function DisplayFromForm(const Form: TCommonCustomForm; const Point: TPoint): TDisplay; overload;
    function DisplayFromForm(const Form: TCommonCustomForm; const Point: TPointF): TDisplay; overload;
    property DesktopRect: TRectF read GetDesktopRect;
    property DesktopTop: Single read GetDesktopTop;
    property DesktopLeft: Single read GetDesktopLeft;
    property DesktopHeight: Single read GetDesktopHeight;
    property DesktopWidth: Single read GetDesktopWidth;
    property WorkAreaRect: TRectF read GetWorkAreaRect;
    property WorkAreaHeight: Single read GetWorkAreaHeight;
    property WorkAreaLeft: Single read GetWorkAreaLeft;
    property WorkAreaTop: Single read GetWorkAreaTop;
    property WorkAreaWidth: Single read GetWorkAreaWidth;

    property FormCount: Integer read GetFormCount;
    property Forms[Index: Integer]: TCommonCustomForm read GetForm;
    property DataModuleCount: Integer read GetDataModuleCount;
    property DataModules[Index: Integer]: TDataModule read GetDataModule;

    property PopupFormCount: Integer read GetPopupFormCount;
    property PopupForms[Index: Integer]: TCommonCustomForm read GetPopupForms;

    function Contains(const AComponent: TComponent): Boolean;
    function IsParent(AForm, AParent: TCommonCustomForm): Boolean;
    function PrepareClosePopups(const SaveForm: TCommonCustomForm): Boolean;
    function ClosePopupForms: Boolean;

    property ActiveForm: TCommonCustomForm read GetActiveForm write SetActiveForm;
    property FocusControl: IControl read GetFocusControl;
    function GetObjectByTarget(const Target: TObject): TFmxObject;
  end;

  { IDesignerForm: Form implementing this interface is part of the designer }
  IDesignerForm = interface
    ['{5D785E12-F0A8-416B-AC6A-20747833CE5D}']
  end;

var
  Screen: TScreen;
  Application: TApplication;

function ApplicationState: TApplicationState;

{$IFDEF MSWINDOWS}
procedure FinalizeForms;
{$ENDIF}

//== INTERFACE END: FMX.Forms
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Controls.Presentation (from FMX.Controls.Presentation.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


const
  PM_BASE                 = $400;
  PM_INIT                 = PM_BASE + 1;
  PM_UNLOAD               = PM_BASE + 2;
  PM_SET_VISIBLE          = PM_BASE + 6;
  PM_GET_VISIBLE          = PM_BASE + 7;
  PM_SET_ABSOLUTE_OPACITY = PM_BASE + 8;
  PM_GET_ABSOLUTE_OPACITY = PM_BASE + 9;
  PM_SET_SIZE             = PM_BASE + 10;
  PM_GET_SIZE             = PM_BASE + 11;
  PM_SET_ABSOLUTE_ENABLED = PM_BASE + 12;
  PM_GET_ABSOLUTE_ENABLED = PM_BASE + 13;
  PM_SET_CLIP_CHILDREN    = PM_BASE + 14;
  PM_GET_CLIP_CHILDREN    = PM_BASE + 15;
  PM_SET_STYLE_LOOKUP     = PM_BASE + 16;
  PM_GET_STYLE_LOOKUP     = PM_BASE + 17;
  PM_GET_NATIVE_OBJECT    = PM_BASE + 20;
  PM_GET_RECOMMEND_SIZE   = PM_BASE + 22;
  PM_IS_FOCUSED           = PM_BASE + 25;
  PM_RESET_FOCUS          = PM_BASE + 26;
  PM_DO_ENTER             = PM_BASE + 33;
  PM_DO_EXIT              = PM_BASE + 34;
  PM_REALIGN              = PM_BASE + 28;
  PM_REFRESH_PARENT       = PM_BASE + 29;
  PM_PARENT_CHANGED       = PM_BASE + 30;
  PM_ANCESSTOR_VISIBLE_CHANGED = PM_BASE + 31;
  PM_KEYDOWN              = PM_BASE + 32;
  PM_KEYUP                = PM_BASE + 35;
  PM_ACTION_CLIENT_CHANGED= PM_BASE + 36;
  PM_ACTION_CHANGE        = PM_BASE + 37;
  PM_APPLY_STYLE_LOOKUP   = PM_BASE + 38;
  PM_SET_STYLES_DATA      = PM_BASE + 39;
  PM_GET_STYLES_DATA      = PM_BASE + 40;
  PM_ABSOLUTE_CHANGED     = PM_BASE + 41;
  PM_HITTEST_CHANGED      = PM_BASE + 42;
  PM_GET_ADJUST_TYPE      = PM_BASE + 43;
  PM_GET_ADJUST_SIZE      = PM_BASE + 44;
  PM_SET_ADJUST_SIZE      = PM_BASE + 45;
  PM_NEED_STYLE_LOOKUP    = PM_BASE + 46;
  PM_ANCESTOR_PRESENTATION_LOADED = PM_BASE + 47;
  PM_FIND_STYLE_RESOURCE  = PM_BASE + 48;
  PM_OBJECT_AT_POINT      = PM_BASE + 49;
  PM_POINT_IN_OBJECT_LOCAL = PM_BASE + 50;
  PM_CHANGE_ORDER         = PM_BASE + 51;
  PM_START_TRIGGER_ANIMATION = PM_BASE + 52;
  PM_APPLY_TRIGGER_EFFECT = PM_BASE + 53;
  PM_GET_RESOURCE_LINK    = PM_BASE + 54;
  PM_SET_ADJUST_TYPE      = PM_BASE + 55;
  PM_ROOT_CHANGED         = PM_BASE + 56;
  PM_MOUSE_WHEEL          = PM_BASE + 57;
  PM_GET_FIRST_CONTROL_WITH_GESTURE = PM_BASE + 58;
  PM_ANCESTOR_PRESENTATION_UNLOADING = PM_BASE + 59;
  PM_DO_BEFORE_EXIT       = PM_BASE + 60;
  PM_PAINT_CHILDREN       = PM_BASE + 61;
  PM_GET_SCENE            = PM_BASE + 62;
  PM_USER                 = $1000;

type

{ TPresentationProxy }

  /// <summary>Information about key pressed by user. Used for sending message from <c>TPresentedControl</c>
  /// to presentation</summary>
  TKeyInfo = record
    /// <summary>Scan code of the pressed keyboard key, or $0.</summary>
    Key: Word;
    /// <summary>Pressed character or digit, or #0.</summary>
    KeyChar: System.WideChar;
    /// <summary>Combination of modifier keys that were pressed when the specified key (Key, KeyChar) was pressed.</summary>
    Shift: TShiftState;
  end;

  /// <summary>Information about action. Is used for sending message from <b>TPresentedControl</b> to presentation</summary>
  TActionInfo = record
    /// <summary>Data of the ASender argument of TPresentedControl.ActionChange.</summary>
    Sender: TBasicAction;
    /// <summary>Data of the ACheckDefaults argument of TPresentedControl.ActionChange.</summary>
    CheckDefaults: Boolean;
  end;

  /// <summary>Information about requesting style resource from presentation. Used for sending message from
  /// <b>TPresentedControl</b> to presentation. The |<b>Resource</b>| is filled by presentation</summary>
  TFindStyleResourceInfo = record
    /// <summary>Whether the returned style resource object should be the original style object (False) or a copy of 
    /// the original (True).</summary>
    Clone: Boolean;
    /// <summary>Name of the style resource object to return.</summary>
    ResourceName: string;
    /// <summary>Property to hold the returned style resource object.</summary>
    Resource: TFmxObject;
  end;

  /// <summary>Information about searching of control at specified point. |<b>Control</b>| contains instance of found
  /// the control</summary>
  TObjectAtPointInfo = record
    /// <summary>Hit-Test Point.</summary>
    Point: TPointF;
    /// <summary>Returned Control if it found.</summary>
    Control: IControl;
  end;

  /// <summary>Information about hit-testing point in local control at specified point.</summary>
  TPointInObjectLocalInfo = record
    /// <summary>Hit-Test Point.</summary>
    Point: TPointF;
    /// <summary>Returned true, if presentation layer contains specified point.</summary>
    Result: Boolean;
  end;

  /// <summary>Information used for staring trigger animation or effect.</summary>
  TTriggerInfo = record
    /// <summary>Link to Instance object that has triggered property</summary>
    Instance: TFmxObject;
    /// <summary>Trigger property name</summary>
    Trigger: string;
    /// <summary>Hold application before trigger animation completed</summary>
    Wait: Boolean;
  end;

  /// <summary>Information used for transfering mouse wheel event into presentation in design time.</summary>
  TMouseWheelInfo = record
    /// <summary>Indicates which shift keys--SHIFT, CTRL, ALT, and CMD (only for Mac)--were down when the pressed
    /// mouse button is released.</summary>
    Shift: TShiftState;
    /// <summary>Indicates the distance the wheel was rotated. WheelDelta is positive if the mouse was rotated upward,
    /// negative if the mouse was rotated downward.</summary>
    WheelDelta: Integer;
    /// <summary>Indicates whether the scroll bar was already moved, depending on the WheelDelta value. If one of the
    /// scrolls bars (vertical or horizontal) was already handled or it does not exist, MouseWheel tries to apply
    /// the rolling on the other scroll bar, if it exists.</summary>
    Handled: Boolean
  end;

  /// <summary>Information used for requesting control, which supports specified gestures</summary>
  TFirstControlWithGestureInfo = record
    /// <summary>Interactive gestures</summary>
    Gestures: TInteractiveGesture;
    /// <summary>Returned control, which supports specified Gestures</summary>
    Control: TComponent;
  end;

  /// <summary>Raised, when presentation received a model of the wrong class</summary>
  EPresentationWrongModel = class(Exception);

  /// <summary><para>Some composit controls like a <b>TListBox</b>, <b>TScrollBox</b>, <b>TMenu</b> and etc, have a
  /// special content for storing and moving items. </para>
  /// <para>When we embeds native control into native scrollbox, we calculate absolute position of native control by
  /// using chain of ancestors until native scrollbox. But we don't need to use <b>TContent</b> in this case, because native
  /// <b>TScrollBox</b> already considered offset of content. So for this purpose we need to use this interface.</para>
  /// <para>We will add to control this interface for asking them About need to consider its line item in case of
  /// computation of absolute coordinates for native controls.</para>
  /// </summary>
  IIgnoreControlPosition = interface
  ['{6C5DA960-D0E0-457B-9464-D489034510B7}']
    /// <summary>See description of <c>IIgnoreControlPosition</c></summary>
    function GetIgnoreControlPosition: Boolean;
  end;

  /// <summary> Proxy. Mediator. Base class for linking a <b>TPresentatedControl</b> control with a presentation.
  /// Successors of it must create presentation in <c>FMX.Presentation.Messages.TMessageSender.CreateReceiver</c>.
  /// </summary>
  TPresentationProxy = class(TMessageSender)
  private
    FNativeObject: IInterface;
    [Weak] FControl: TControl;
    [Weak] FModel: TDataModel;
  public
    /// <summary>Default constructor, requests native control by presentation by sending <b>PM_GET_NATIVE_OBJECT</b>
    /// message to presentation (<b>Receiver</b>).</summary>
    constructor Create; override;
    /// <summary>Initializes proxy by control and model and create link with presentation by using
    /// <c>FMX.Presentation.Messages.TMessageSender.CreateReceiver</c></summary>
    /// <param name="AModel">Model instance of |<b>AControl</b>|</param>
    /// <param name="AControl">Control, which supports using of presentation (usually <b>TPresentedControl</b>)</param>
    constructor Create(const AModel: TDataModel; const AControl: TControl); overload; virtual;
    /// <summary>Releases presentation, if presentation was created by using
    /// <c>FMX.Presentation.Messages.TMessageSender.CreateReceiver</c></summary>
    destructor Destroy; override;
    /// <summary>Returns True if proxy has native control. Returns False otherwise.</summary>
    function HasNativeObject: Boolean;
  public
    /// <summary>Returns presented control</summary>
    property PresentedControl: TControl read FControl;
    /// <summary>Returns model</summary>
    property Model: TDataModel read FModel;
    /// <summary>If presentation has native control, this property will contains reference on Instance of native control.
    /// Proxy send request on getting native control by using <b>PM_GET_NATIVE_OBJECT</b> message</summary>
    /// <remarks>You can use it for directly access to native control by casting to required type, if presentation uses
    /// native control</remarks>
    property NativeObject: IInterface read FNativeObject;
  end;
  /// <summary>Class of <b>TPresentationProxy</b></summary>
  TPresentationProxyClass = class of TPresentationProxy;

{ TPresentedControl }

  /// <summary>Event type for choosing presentation name by <b>TPresentedControl</b></summary>
  TPresenterNameChoosingEvent = procedure (Sender: TObject; var PresenterName: string) of object;

  /// <summary>States of presentation</summary>
  TPresentationState = (NotLoaded, Loading, Loaded, Unloading);

  ISceneChildrenObserver = interface
  ['{FD2EF8F6-EFF5-40EF-84A1-2850C42B3554}']
    procedure ChildWasRemoved(const AChild: TFmxObject);
  end;

  /// <summary>Control, which supports working with <b>Model</b> and <b>Presentations</b>. Control can has instance of
  /// <b>Model</b> for storing data of control. <b>TPresentedControl</b> provide mechanism for choosing, creating,
  /// loading, using and unloading presentations. For communication with presentation <b>TPresentedControl</b> uses
  /// <b>TPresentationProxy</b>.</summary>
  TPresentedControl = class(TStyledControl, IMessageSendingCompatible, IControlTypeSupportable, ISceneChildrenObserver)
  public type
    /// <summary>Defines whether the control should use styled or native presentation. This type has been deprecated,
    /// and TControlType from "FMX.Controls.pas" unit should be used instead.</summary>
    TControlType = FMX.Controls.TControlType deprecated 'Use TControlType declared in FMX.Controls.pas';
  private
    FModel: TDataModel;
    FControlType: TControlType;
    FPresentationProxy: TPresentationProxy;
    FState: TPresentationState;
    FSceneObjects: TFmxObjectList;
    FCanUseDefaultPresentation: Boolean;
    FOnPresenterNameChoosing: TPresenterNameChoosingEvent;
    function GetPresentation: TObject;
    function GetPresentationScene: TFmxObject;
    function CreateModel: TDataModel;
    procedure DoPresentationNameChoosing(var APresentationName: string);
    procedure RemoveStyleResource;
    { IMessageSendingCompatible }
    function GetMessageSender: TMessageSender;
    { IControlTypeSupportable }
    function GetControlType: TControlType;
    procedure SetControlType(const Value: TControlType);
    { ISceneChildrenObserver }
    procedure ChildWasRemoved(const AChild: TFmxObject);
  protected
    procedure Loaded; override;
    procedure PaintChildren; override;
    { Notifications }
    /// <summary>Notifies about changed <c>ControlType</c></summary>
    procedure ControlTypeChanged; virtual;
    /// <summary>Notifies about changed <c>ClipChildren</c></summary>
    procedure ClipChildrenChanged; override;
    /// <summary>Notifies about changed <c>HitTest</c></summary>
    procedure HitTestChanged; override;
    { Styles }
    function GetDefaultStyleLookupName: string; override;
    procedure StyleLookupChanged; override;
    procedure StyleDataChanged(const Index: string; const Value: TValue); override;
    function RequestStyleData(const Index: string): TValue; override;
    function GetResourceLink: TFmxObject; override;
    { Controls Tree Structure }
    procedure AncestorParentChanged; override;
    procedure AncestorVisibleChanged(const AVisible: Boolean); override;
    procedure SetVisible(const Value: Boolean); override;
    function ObjectAtPoint(P: TPointF): IControl; override;
    procedure ChangeOrder; override;
    procedure ParentChanged; override;
    { Children }
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoInsertObject(Index: Integer; const AObject: TFmxObject); override;
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    procedure DoDeleteChildren; override;
    procedure DoRootChanged; override;
    { Size and Position }
    function DoSetSize(const ASize: TControlSize; const NewPlatformDefault: Boolean; ANewWidth, ANewHeight: Single;
       var ALastWidth: Single; var ALastHeight: Single): Boolean; override;
    procedure DoAbsoluteChanged; override;
    procedure DoRealign; override;
    /// <summary>Defines recommended size for specified size <c>AWishedSize</c></summary>
    function RecommendSize(const AWishedSize: TSizeF): TSizeF; virtual;
    { Keyboard }
    procedure KeyDown(var AKey: Word; var AKeyChar: System.WideChar; AShift: TShiftState); override;
    procedure KeyUp(var AKey: Word; var AKeyChar: Char; AShift: TShiftState); override;
    { Focus }
    procedure DoEnter; override;
    procedure DoExit; override;
    procedure AfterPaint; override;
    { IGestureControl }
    function GetFirstControlWithGesture(AGesture: TInteractiveGesture): TComponent; override;
    { IAlignableObject }
    procedure SetAdjustSizeValue(const Value: TSizeF); override;
    function GetAdjustSizeValue: TSizeF; override;
    function GetAdjustType: TAdjustType; override;
    procedure SetAdjustType(const Value: TAdjustType); override;
    { Actions }
    procedure ActionChange(ASender: TBasicAction; ACheckDefaults: Boolean); override;
    procedure DoActionClientChanged; override;
    { Presentations }
    /// <summary>Returns presentation name for current control.</summary>
    /// <remarks>By default presentation name is generated as <b>"ClassName (Without prefix T)"</b>-<c>GetPresentationSuffix</c> </remarks>
    function DefinePresentationName: string; virtual;
    /// <summary><para>Returns presentation suffix for <c>DefinePresentationName</c>, which depends on <c>ControlType</c> value.</para>
    /// <para>If <c>ControlType</c> equals <b>Styled</b>, return <b>styled</b></para>
    /// <para>If <c>ControlType</c> equals <b>Platform</b>, return <b>native</b></para></summary>
    function GetPresentationSuffix: string;
    /// <summary>Initializes a presentation through <c>PresentationProxy</c>. Allows users to set custom data for
    /// presentation</summary>
    procedure InitPresentation(APresentation: TPresentationProxy); virtual;
    /// <summary>Notify all child controls, that <c>AControl</c> changed presentation.</summary>
    procedure AncestorPresentationLoaded(const AControl: TPresentedControl);
    /// <summary>Notify all child controls, that <c>AControl</c> is unloading presentation.</summary>
    procedure AncestorPresentationUnloading(const AControl: TPresentedControl);
    { Model }
    /// <summary>Tries to cast current model to type <c>T</c>. If specified type <c>T</c> is not compatible with
    /// <c>Model</c>, return nil.</summary>
    function GetModel<T: TDataModel>: T;
    /// <summary>Returns class of controls model. By default it is <c>TDataModel</c>. User can return nil. In this case
    /// <c>TPresentedControl</c> will not have Model.</summary>
    function DefineModelClass: TDataModelClass; virtual;
    /// <summary>If control cannot find presentation, control will try to load default presentation <c>'default-' +
    /// GetPresentationSuffix</c> only if this property is true.</summary>
    property CanUseDefaultPresentation: Boolean read FCanUseDefaultPresentation write FCanUseDefaultPresentation;
    /// <summary>Query interface from current control. If <c>TPresentedControl</c> doesn't support specified interface, it will
    /// query it from presentation.</summary>
    function QueryInterface(const IID: TGUID; out Obj): HRESULT; override; stdcall;
    /// <summary>Returns native presentation scene, which is used for rendering nested controls. Can be nil.</summary>
    property PresentationScene: TFmxObject read GetPresentationScene;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function HasPresentationProxy: Boolean;
    procedure RecalcEnabled; override;
    procedure RecalcOpacity; override;
    procedure AfterConstruction; override;
    procedure BeforeDestruction; override;
    procedure ApplyStyleLookup; override;
    procedure NeedStyleLookup; override;
    function FindStyleResource(const AStyleLookup: string; const AClone: Boolean = False): TFmxObject; override;
    function PointInObjectLocal(X: Single; Y: Single): Boolean; override;
    procedure ApplyTriggerEffect(const AInstance: TFmxObject; const ATrigger: string); override;
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string); override;
    procedure StartTriggerAnimationWait(const AInstance: TFmxObject; const ATrigger: string); override;
    { Presentations }
    /// <summary><para>Finds presentation proxy class from <c>TPresentationProxyFactory</c>, creates instance of presentation
    /// proxy and attaches to itself.</para><para>Also notifies all child controls about new loaded presentation.</para></summary>
    /// <remarks>If current presentation has the same class as a found new a presentation proxy class, this method
    /// doesn't replace current presentation. Unloads and releases current presentation otherwise.</remarks>
    procedure LoadPresentation; virtual;
    /// <summary>Unloads and releases current presentation proxy.</summary>
    procedure UnloadPresentation; virtual;
    /// <summary>Unloads existing presentation proxy and tries to load new instead.</summary>
    procedure ReloadPresentation;
  public
    property ControlType: TControlType read GetControlType write SetControlType default TControlType.Styled;
    /// <summary>Returns instance of presentation object</summary>
    property Presentation: TObject read GetPresentation;
    /// <summary>Returns intermediary between presentation and PresentedControl. Can be used for sending messages to
    /// presentation</summary>
    property PresentationProxy: TPresentationProxy read FPresentationProxy;
    /// <summary>State of presentation: <c>NotLoaded</c>, <c>Loading</c>, <c>Loaded</c> or <c>Unloading.</c></summary>
    property PresentationState: TPresentationState read FState;
    /// <summary>Returns instance of control's model</summary>
    property Model: TDataModel read FModel;
    /// <summary>Event handler allows to change presentation name. And replace default presentation name on another. It can be used for
    /// replacing default FMX presentation on the user's presentation without creating custom component.</summary>
    property OnPresentationNameChoosing: TPresenterNameChoosingEvent read FOnPresenterNameChoosing write FOnPresenterNameChoosing;
  end;

//== INTERFACE END: FMX.Controls.Presentation
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.BehaviorManager (from FMX.BehaviorManager.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  IStyleBehavior = interface
    ['{665EC261-3E3C-41F1-9964-ADCB39B47662}']
    procedure GetSystemStyle(const Context: TFmxObject; var Style: TFmxObject);
  end;

  IDeviceBehavior = interface
    ['{820055FF-2005-4160-8751-6BCD492C117E}']
    procedure GetName(const Context: TFmxObject; var DeviceName: string);
    function GetDeviceClass(const Context: TFmxObject): TDeviceInfo.TDeviceClass;
    /// <summary>Returns current device, which's view is selected in IDE</summary>
    function GetDevice(const Context: TFmxObject): TDeviceInfo;
    function GetOSPlatform(const Context: TFmxObject): TOSPlatform;
    function GetDisplayMetrics(const Context: TFmxObject): TDeviceDisplayMetrics;
  end;

  IOSVersionForStyleBehavior = interface
    ['{F55F7580-3E67-4916-8D16-A33AFC171888}']
    procedure GetMajorOSVersion(const Context: TFMXObject; var OSVersion: Integer);
  end;

  IFontBehavior = interface
    ['{25D83842-FF28-4748-90C0-7E8610141190}']
    procedure GetDefaultFontFamily(const Context: TFmxObject; var FontFamily: string);
    procedure GetDefaultFontSize(const Context: TFmxObject; var FontSize: Single);
  end;

  IListener = interface
    ['{9D325387-E1F1-4B3F-A9FB-BAFF9CE03B8C}']
    procedure GetBehaviorService(const AServiceGUID: TGUID;
      var AService: IInterface; const Context: TFmxObject);
    procedure SupportsBehaviorService(const AServiceGUID: TGUID;
      const Context: TFmxObject; var Found: Boolean); overload;
    procedure SupportsBehaviorService(const AServiceGUID: TGUID;
      var AService: IInterface; const Context: TFmxObject; var Found: Boolean); overload;
  end;

  /// <summary>Used by <c>TPresentedControl</c> for getting overlay icon. This icon is used to point that
  /// <c>TPresentedControl</c> uses platform presentation (ControlType = Platform)</summary>
  IPresentedControlBehavior = interface
    ['{B98B1B59-C1AF-4D53-8D81-1A429460A11C}']
    /// <summary>Returns overlay icon. See description of <c>IPresentedControlBehavior</c></summary>
    function GetOverlayIcon: TBitmap;
  end;

  TBehaviorServices = class
  protected type
    TServicesList = TDictionary<TGUID, IInterface>;
    TListenerList = TList<IListener>;
  private
    FServicesList: TServicesList;
    FListenerList: TListenerList;
    function GetServicesList: TServicesList;
    function GetListenerList: TListenerList;
  private
    class var FCurrent: TBehaviorServices;
    class destructor DestroyCurrent;
    class function GetCurrent: TBehaviorServices; static;
  protected
    property ServicesList: TServicesList read GetServicesList;
    property ListenerList: TListenerList read GetListenerList;
  public
    destructor Destroy; override;
    procedure AddBehaviorListener(const Listener: IListener);
    procedure AddBehaviorService(const AServiceGUID: TGUID; const AService: IInterface);
    function GetBehaviorService(const AServiceGUID: TGUID;
      const Context: TFmxObject): IInterface;
    procedure RemoveBehaviorListener(const Listener: IListener);
    procedure RemoveBehaviorService(const AServiceGUID: TGUID);
    function SupportsBehaviorService(const AServiceGUID: TGUID;
      const Context: TFmxObject): Boolean; overload;
    function SupportsBehaviorService(const AServiceGUID: TGUID;
      out AService; const Context: TFmxObject): Boolean; overload;
    class property Current: TBehaviorServices read GetCurrent;
  end;

  /// <summary>Type of Boolean value, which has third value, which is depended on target platform</summary>
  TBehaviorBoolean = (True, False, PlatformDefault);

function BehaviorServices: TBehaviorServices; inline; deprecated 'Use TBehaviorServices.Current';

//== INTERFACE END: FMX.BehaviorManager
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Dialogs (from FMX.Dialogs.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type

{ TCommonDialog }

  TCommonDialog = class(TFmxObject)
  private
    FHelpContext: THelpContext;
    FOnClose: TNotifyEvent;
    FOnShow: TNotifyEvent;
  protected
    procedure DoClose; dynamic;
    procedure DoShow; dynamic;
    function DoExecute: Boolean; virtual; abstract;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function Execute: Boolean; overload; virtual;
  published
    property HelpContext: THelpContext read FHelpContext write FHelpContext default 0;
    property OnClose: TNotifyEvent read FOnClose write FOnClose;
    property OnShow: TNotifyEvent read FOnShow write FOnShow;
  end;

{ TOpenDialog }

  [ComponentPlatformsAttribute(pfidWindows or pfidOSX or pfidLinux)]
  TOpenDialog = class(TCommonDialog)
  private
    FHistoryList: TStrings;
    FOptions: TOpenOptions;
    FOptionsEx: TOpenOptionsEx;
    FFilter: string;
    FFilterIndex: Integer;
    FInitialDir: string;
    FTitle: string;
    FDefaultExt: string;
    FFileName: TFileName;
    FFiles: TStrings;
    FOnSelectionChange: TNotifyEvent;
    FOnFolderChange: TNotifyEvent;
    FOnTypeChange: TNotifyEvent;
    FOnCanClose: TCloseQueryEvent;
    function GetFileName: TFileName;
    function GetFiles: TStrings;
    function GetFilterIndex: Integer;
    function GetInitialDir: string;
    function GetTitle: string;
    procedure ReadFileEditStyle(Reader: TReader);
    procedure SetFileName(const Value: TFileName);
    procedure SetHistoryList(const Value: TStrings);
    procedure SetInitialDir(const Value: string);
    procedure SetTitle(const Value: string);
  protected
    function DoCanClose: Boolean; dynamic;
    procedure DoSelectionChange; dynamic;
    procedure DoFolderChange; dynamic;
    procedure DoTypeChange; dynamic;
    procedure DefineProperties(Filer: TFiler); override;
    function DoExecute: Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    property Files: TStrings read GetFiles;
    property HistoryList: TStrings read FHistoryList write SetHistoryList;
  published
    property DefaultExt: string read FDefaultExt write FDefaultExt;
    property FileName: TFileName read GetFileName write SetFileName;
    property Filter: string read FFilter write FFilter;
    property FilterIndex: Integer read GetFilterIndex write FFilterIndex default 1;
    property InitialDir: string read GetInitialDir write SetInitialDir;
    property Options: TOpenOptions read FOptions write FOptions
      default [TOpenOption.ofHideReadOnly, TOpenOption.ofEnableSizing];
    property OptionsEx: TOpenOptionsEx read FOptionsEx write FOptionsEx default [];
    property Title: string read GetTitle write SetTitle;
    property OnCanClose: TCloseQueryEvent read FOnCanClose write FOnCanClose;
    property OnFolderChange: TNotifyEvent read FOnFolderChange write FOnFolderChange;
    property OnSelectionChange: TNotifyEvent read FOnSelectionChange write FOnSelectionChange;
    property OnTypeChange: TNotifyEvent read FOnTypeChange write FOnTypeChange;
  end;

{ TSaveDialog }

  [ComponentPlatformsAttribute(pfidWindows or pfidOSX or pfidLinux)]
  TSaveDialog = class(TOpenDialog)
  protected
    function DoExecute: Boolean; override;
  end;

const
  mbYesNo = [TMsgDlgBtn.mbYes, TMsgDlgBtn.mbNo];
  mbYesNoCancel = [TMsgDlgBtn.mbYes, TMsgDlgBtn.mbNo, TMsgDlgBtn.mbCancel];
  mbYesAllNoAllCancel = [TMsgDlgBtn.mbYes, TMsgDlgBtn.mbYesToAll, TMsgDlgBtn.mbNo,
    TMsgDlgBtn.mbNoToAll, TMsgDlgBtn.mbCancel];
  mbOKCancel = [TMsgDlgBtn.mbOK, TMsgDlgBtn.mbCancel];
  mbAbortRetryIgnore = [TMsgDlgBtn.mbAbort, TMsgDlgBtn.mbRetry, TMsgDlgBtn.mbIgnore];
  mbAbortIgnore = [TMsgDlgBtn.mbAbort, TMsgDlgBtn.mbIgnore];

  MsgTitles: array[TMsgDlgType] of string = (SMsgDlgWarning, SMsgDlgError, SMsgDlgInformation, SMsgDlgConfirm, '');
  ModalResults: array[TMsgDlgBtn] of Integer = (mrYes, mrNo, mrOk, mrCancel, mrAbort, mrRetry, mrIgnore, mrAll,
    mrNoToAll, mrYesToAll, 0, mrClose);
  ButtonCaptions: array[TMsgDlgBtn] of string = (SMsgDlgYes, SMsgDlgNo, SMsgDlgOK, SMsgDlgCancel, SMsgDlgAbort,
    SMsgDlgRetry, SMsgDlgIgnore, SMsgDlgAll, SMsgDlgNoToAll, SMsgDlgYesToAll, SMsgDlgHelp, SMsgDlgClose);

type
  TInputCloseQueryEvent = procedure(Sender: TObject; const Values: array of string; var CanClose: Boolean) of object;
  TInputCloseQueryFunc = reference to function(const Values: array of string): Boolean;
  TInputCloseQueryProc = reference to procedure(const AResult: TModalResult; const AValues: array of string);
  TInputCloseBoxProc = reference to procedure(const AResult: TModalResult; const AValue: string);
  TInputCloseDialogProc = reference to procedure(const AResult: TModalResult);
  TInputCloseDialogEvent = procedure(Sender: TObject; const AResult: TModalResult) of object;
  TInputCloseQueryWithResultEvent = procedure(Sender: TObject; const AResult: TModalResult; const AValues: array of string) of object;
  TInputCloseBoxEvent = procedure(Sender: TObject; const AResult: TModalResult; const AValue: string) of object;

/// <summary>Message dialogs must be shown in the UI thread. This procedure chacks that and raises an exception if is not in the UI thread.</summary>
procedure MessageDialogCheckInUIThread;

function MessageDlg(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext): Integer; overload; inline; deprecated 'Use FMX.DialogService methods';
procedure MessageDlg(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const ACloseDialogProc: TInputCloseDialogProc); overload; inline; deprecated 'Use FMX.DialogService methods';
procedure MessageDlg(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const ACloseDialogEvent: TInputCloseDialogEvent; const AContext: TObject = nil); overload; inline;
  deprecated 'Use FMX.DialogService methods';

function MessageDlg(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const ADefaultButton: TMsgDlgBtn): Integer; overload; inline; deprecated 'Use FMX.DialogService methods';
procedure MessageDlg(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const ADefaultButton: TMsgDlgBtn;
  const ACloseDialogProc: TInputCloseDialogProc); overload; inline; deprecated 'Use FMX.DialogService methods';
procedure MessageDlg(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const ADefaultButton: TMsgDlgBtn; const ACloseDialogEvent: TInputCloseDialogEvent;
  const AContext: TObject = nil); overload; inline; deprecated 'Use FMX.DialogService methods';

function MessageDlgPos(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const AX, AY: Integer): Integer; overload; inline; deprecated 'Use FMX.DialogService methods';
procedure MessageDlgPos(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const AX, AY: Integer; const ACloseDialogProc: TInputCloseDialogProc); overload; inline;
  deprecated 'Use FMX.DialogService methods';
procedure MessageDlgPos(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const AX, AY: Integer; const ACloseDialogEvent: TInputCloseDialogEvent;
  const AContext: TObject = nil); overload; inline; deprecated 'Use FMX.DialogService methods';

function MessageDlgPos(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const AX, AY: Integer; const ADefaultButton: TMsgDlgBtn): Integer; overload; inline;
  deprecated 'Use FMX.DialogService methods';
procedure MessageDlgPos(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const AX, AY: Integer; const ADefaultButton: TMsgDlgBtn;
  const ACloseDialogProc: TInputCloseDialogProc); overload; inline; deprecated 'Use FMX.DialogService methods';
procedure MessageDlgPos(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const AX, AY: Integer; const ADefaultButton: TMsgDlgBtn;
  const ACloseDialogEvent: TInputCloseDialogEvent; const AContext: TObject = nil); overload; inline;
   deprecated 'Use FMX.DialogService methods';

function MessageDlgPosHelp(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const AX, AY: Integer; const AHelpFileName: string): Integer; overload;
  deprecated 'Use FMX.DialogService methods';
procedure MessageDlgPosHelp(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const AX, AY: Integer; const AHelpFileName: string;
  const ACloseDialogProc: TInputCloseDialogProc); overload; deprecated 'Use FMX.DialogService methods';
procedure MessageDlgPosHelp(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const AX, AY: Integer; const AHelpFileName: string;
  const ACloseDialogEvent: TInputCloseDialogEvent; const AContext: TObject = nil); overload;
  deprecated 'Use FMX.DialogService methods';

function MessageDlgPosHelp(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const AX, AY: Integer; const AHelpFileName: string;
  const ADefaultButton: TMsgDlgBtn): Integer; overload; deprecated 'Use FMX.DialogService methods';
procedure MessageDlgPosHelp(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const AX, AY: Integer; const AHelpFileName: string;
  const ADefaultButton: TMsgDlgBtn; const ACloseDialogProc: TInputCloseDialogProc); overload;
  deprecated 'Use FMX.DialogService methods';
procedure MessageDlgPosHelp(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
  const AHelpContext: THelpContext; const AX, AY: Integer; const AHelpFileName: string;
  const ADefaultButton: TMsgDlgBtn; const ACloseDialogEvent: TInputCloseDialogEvent; const AContext: TObject = nil); overload;
  deprecated 'Use FMX.DialogService methods';

procedure ShowMessage(const AMessage: string);
procedure ShowMessageFmt(const AMessage: string; const AParams: array of const);
procedure ShowMessagePos(const AMessage: string; const AX, AY: Integer); deprecated 'Use FMX.DialogService methods';

function SelectDirectory(const Caption: string; const Root: string;
  var Directory: string): Boolean;

{ Input dialog }

function InputBox(const ACaption, APrompt, ADefault: string): string; overload; deprecated 'Use FMX.DialogService methods';
procedure InputBox(const ACaption, APrompt, ADefault: string; const ACloseBoxProc: TInputCloseBoxProc); overload;
  deprecated 'Use FMX.DialogService methods';
procedure InputBox(const ACaption, APrompt, ADefault: string; const ACloseBoxEvent: TInputCloseBoxEvent;
  const AContext: TObject = nil); overload; deprecated 'Use FMX.DialogService methods';

function InputQuery(const ACaption: string; const APrompts: array of string; var AValues: array of string;
  const ACloseQueryFunc: TInputCloseQueryFunc = nil): Boolean; overload; deprecated 'Use FMX.DialogService methods';
function InputQuery(const ACaption: string; const APrompts: array of string; var AValues: array of string;
  const ACloseQueryEvent: TInputCloseQueryEvent; const AContext: TObject = nil): Boolean; overload; deprecated 'Use FMX.DialogService methods';
function InputQuery(const ACaption, APrompt: string; var Value: string): Boolean; overload; deprecated 'Use FMX.DialogService methods';

procedure InputQuery(const ACaption: string; const APrompts: array of string; const ADefaultValues: array of string;
  const ACloseQueryProc: TInputCloseQueryProc); overload; deprecated 'Use FMX.DialogService methods';
procedure InputQuery(const ACaption: string; const APrompts: array of string; const ADefaultValues: array of string;
  const ACloseQueryEvent: TInputCloseQueryWithResultEvent; const AContext: TObject = nil); overload;
  deprecated 'Use FMX.DialogService methods';
procedure InputQuery(const ACaption, APrompt, ADefaultValue: string; const ACloseBoxProc: TInputCloseBoxProc); overload;
  deprecated 'Use FMX.DialogService methods';
procedure InputQuery(const ACaption, APrompt, ADefaultValue: string;
  const ACloseQueryEvent: TInputCloseQueryWithResultEvent; const AContext: TObject = nil); overload;
  deprecated 'Use FMX.DialogService methods';

{ Localization }

function LocalizedButtonCaption(const AButton: TMsgDlgBtn): string; inline;
function LocalizedMessageDialogTitle(const ADialogType: TMsgDlgType): string; inline;

//== INTERFACE END: FMX.Dialogs
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Platform (from FMX.Platform.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  EInvalidFmxHandle = class(Exception);
  EUnsupportedPlatformService = class(Exception)
    constructor Create(const Msg: string);
  end;
  EUnsupportedOSVersion = class(Exception);

  TPlatformServices = class
  private
    FServicesList: TDictionary<TGUID, IInterface>;
    FGlobalFlags: TDictionary<string, Boolean>;
    class var FCurrent: TPlatformServices;
    class var FCurrentReleased: Boolean;
    class procedure ReleaseCurrent;
    class function GetCurrent: TPlatformServices; static;
  public
    constructor Create;
    destructor Destroy; override;
    procedure AddPlatformService(const AServiceGUID: TGUID; const AService: IInterface);
    procedure RemovePlatformService(const AServiceGUID: TGUID);
    function GetPlatformService(const AServiceGUID: TGUID): IInterface;
    function SupportsPlatformService(const AServiceGUID: TGUID): Boolean; overload;
    function SupportsPlatformService(const AServiceGUID: TGUID; out AService): Boolean; overload;
    property GlobalFlags: TDictionary<string, Boolean> read FGlobalFlags;
    class property Current: TPlatformServices read GetCurrent;
  end;

  IFMXApplicationService = interface
    ['{EFBE3310-D103-4E9E-A8E1-4E45AB46D0D8}']
    procedure Run;
    function HandleMessage: Boolean;
    procedure WaitMessage;
    function GetDefaultTitle: string;
    function GetTitle: string;
    procedure SetTitle(const Value: string);
    ///  <summary>Gets a string representing the version number of the application</summary>
    function GetVersionString: string;
    procedure Terminate;
    function Terminating: Boolean;
    function Running: Boolean;

    property DefaultTitle: string read GetDefaultTitle;
    property Title: string read GetTitle write SetTitle;
    ///  <summary>Returns the version of the application as specified in Project/Options</summary>
    property AppVersion: string read GetVersionString;
  end;

  { Application events }

  TApplicationEvent = (FinishedLaunching, BecameActive, WillBecomeInactive, EnteredBackground, WillBecomeForeground, WillTerminate, LowMemory, TimeChange, OpenURL);

  TApplicationEventHelper = record helper for TApplicationEvent
  const
    aeFinishedLaunching = TApplicationEvent.FinishedLaunching deprecated 'Use TApplicationEvent.FinishedLaunching';
    aeBecameActive = TApplicationEvent.BecameActive deprecated 'Use TApplicationEvent.BecameActive';
    aeWillBecomeInactive = TApplicationEvent.WillBecomeInactive deprecated 'Use TApplicationEvent.WillBecomeInactive';
    aeEnteredBackground = TApplicationEvent.EnteredBackground deprecated 'Use TApplicationEvent.EnteredBackground';
    aeWillBecomeForeground = TApplicationEvent.WillBecomeForeground deprecated 'Use TApplicationEvent.WillBecomeForeground';
    aeWillTerminate = TApplicationEvent.WillTerminate deprecated 'Use TApplicationEvent.WillTerminate';
    aeLowMemory = TApplicationEvent.LowMemory deprecated 'Use TApplicationEvent.LowMemory';
    aeTimeChange = TApplicationEvent.TimeChange deprecated 'Use TApplicationEvent.TimeChange';
    aeOpenURL = TApplicationEvent.OpenURL deprecated 'Use TApplicationEvent.OpenURL';
  end;

  TApplicationEventData = record
    Event: TApplicationEvent;
    Context: TObject;
    constructor Create(const AEvent: TApplicationEvent; AContext: TObject);
  end;
  TApplicationEventMessage = class (System.Messaging.TMessage<TApplicationEventData>)
  public
    constructor Create(const AData: TApplicationEventData);
  end;

  TApplicationEventHandler = function (AAppEvent: TApplicationEvent; AContext: TObject): Boolean of object;

  IFMXApplicationEventService = interface(IInterface)
    ['{F3AAF11A-1678-4CC6-A5BF-721A24A676FD}']
    procedure SetApplicationEventHandler(AEventHandler: TApplicationEventHandler);
  end;

  { Application appearance }

  /// <summary>System theme type.</summary>
  TSystemThemeKind = (Unspecified, Light, Dark);
  /// <summary>System color type.</summary>
  TSystemColorType = (Accent);

  /// <summary>Operation system appearance information.</summary>
  TSystemAppearance = class
  private
    function GetSystemColor(const Index: TSystemColorType): TAlphaColor;
    function GetThemeKind: TSystemThemeKind;
  public
    /// <summary>System accent color, usually used for emphasis controls elements.</summary>
    property AccentColor: TAlphaColor index TSystemColorType.Accent read GetSystemColor;
    /// <summary>System theme kind.</summary>
    property ThemeKind: TSystemThemeKind read GetThemeKind;
  end;

  /// <summary>Notification about changing operation system appearance.</summary>
  TSystemAppearanceChangedMessage = class(TObjectMessage<TSystemAppearance>);

  /// <summary>Service provides information about operation system theme.</summary>
  IFMXSystemAppearanceService = interface
  ['{AB6A83D9-0118-4C5F-95CC-351DBB5EA943}']
    /// <summary>Returns system theme kind.</summary>
    function GetSystemThemeKind: TSystemThemeKind;
    /// <summary>Returns system color for specified type.</summary>
    function GetSystemColor(const AType: TSystemColorType): TAlphaColor;
    /// <summary>System theme kind.</summary>
    property ThemeKind: TSystemThemeKind read GetSystemThemeKind;
  end;

  { Application hide service }

  IFMXHideAppService = interface(IInterface)
    ['{D9E49FCB-6A8B-454C-B11A-CEB3CEFAD357}']
    function GetHidden: Boolean;
    procedure SetHidden(const Value: Boolean);
    procedure HideOthers;
    property Hidden: Boolean read GetHidden write SetHidden;
  end;

  TDeviceFeature = (HasTouchScreen);
  TDeviceFeatures = set of TDeviceFeature;

  IFMXDeviceService = interface(IInterface)
    ['{9419B3C0-379A-4556-B5CA-36C975462326}']
    function GetModel: string;
    function GetFeatures: TDeviceFeatures;
    function GetDeviceClass: TDeviceInfo.TDeviceClass;
  end;

  IFMXDeviceMetricsService = interface(IInterface)
    ['{CCC4D351-BA3A-4884-B4F6-4F020600F15F}']
    function GetDisplayMetrics: TDeviceDisplayMetrics;
  end;

  IFMXDragDropService = interface(IInterface)
    ['{73133536-5868-44B6-B02D-7364F75FAD0E}']
    procedure BeginDragDrop(AForm: TCommonCustomForm; const Data: TDragObject; ABitmap: TBitmap);
  end;

  IFMXClipboardService = interface(IInterface)
    ['{CC9F70B3-E5AE-4E01-A6FB-E3FC54F5C54E}']
    /// <summary>
    ///   Gets current clipboard value
    /// </summary>
    function GetClipboard: TValue;
    /// <summary>
    ///   Sets new clipboard value
    /// </summary>
    procedure SetClipboard(Value: TValue);
  end;

  IFMXScreenService = interface(IInterface)
    ['{BBA246B6-8DEF-4490-9D9C-D2CBE6251A24}']
    /// <summary>Returns logical size (dp) of primary monitor.</summary>
    function GetScreenSize: TPointF;
    /// <summary>Returns scale of primary monitor.</summary>
    function GetScreenScale: Single;
    /// <summary>Returns current screen orientation.</summary>
    /// <remarks>It's not applicable for desktop platforms.</remarks>
    function GetScreenOrientation: TScreenOrientation;
    procedure SetSupportedScreenOrientations(const AOrientations: TScreenOrientations);
  end;

  IFMXMultiDisplayService = interface(IInterface)
    ['{133A6050-AC29-4233-9EE2-D49082C33BBF}']
    /// <summary>Returns count of displays in system.</summary>
    function GetDisplayCount: Integer;
    /// <summary>Returns region on main screen allocated for showing application (dp).</summary>
    function GetWorkAreaRect: TRectF;
    /// <summary>Returns region on main screen allocated for showing application (px).</summary>
    function GetPhysicalWorkAreaRect: TRect;
    /// <summary>Returns union of all displays (dp).</summary>
    function GetDesktopRect: TRectF;
    /// <summary>Returns union of all displays (px).</summary>
    function GetPhysicalDesktopRect: TRect;
    /// <summary>Returns display information by specified display index.</summary>
    function GetDisplay(const Index: Integer): TDisplay;
    /// <summary>Returns a rectangle having the specified Size and positioned in the center of desktop.</summary>
    function GetDesktopCenterRect(const Size: TSizeF): TRectF;
    /// <summary>Refreshes current information about all displays in system.</summary>
    procedure UpdateDisplayInformation;
    property DisplayCount: Integer read GetDisplayCount;
    property WorkAreaRect: TRectF read GetWorkAreaRect;
    property DesktopRect: TRectF read GetDesktopRect;
    property PhysicalWorkAreaRect: TRect read GetPhysicalWorkAreaRect;
    property PhysicalDesktopRect: TRect read GetPhysicalDesktopRect;
    property Displays[const Index: Integer]: TDisplay read GetDisplay;
    /// <summary>Returns display, which is related with specified form <c>AHandle</c>.</summary>
    function DisplayFromWindow(const Handle: TWindowHandle): TDisplay;
    /// <summary>Returns display, which is related with specified form <c>AHandle</c> and <c>APoint</c>.</summary>
    /// <remarks>Form can be placed on two displays at the same time (on a border of two displays), but not on iOS.
    /// So <c>APoint</c> parameter is not supported on iOS. It works like a <c>DisplayFromWindow</c>.</remarks>
    function DisplayFromPoint(const Handle: TWindowHandle; const Point: TPoint): TDisplay;
  end;

  IFMXLocaleService = interface(IInterface)
    ['{311A40D4-3D5B-40CC-A201-78465760B25E}']
    function GetCurrentLangID: string;
    /// <summary>Returns first day of week in current locale.</summary>
    /// <remarks>Result is platform depended. Each platform counts Monday by different int number.</remarks>
    function GetLocaleFirstDayOfWeek: string; deprecated 'Use GetFirstWeekday instead';
    /// <summary>Returns first day of week in current locale.</summary>
    /// <remarks>Result is platform-independent value. 1 - Monday</remarks>
    function GetFirstWeekday: Byte;
  end;

  IFMXDialogService = interface(IInterface)
    ['{CF7DCC1C-B5D6-4B24-92E7-1D09768E2D6B}']
    function DialogOpenFiles(const ADialog: TOpenDialog; var AFiles: TStrings; AType: TDialogType = TDialogType.Standard): Boolean;
    function DialogPrint(var ACollate, APrintToFile: Boolean;
      var AFromPage, AToPage, ACopies: Integer; AMinPage, AMaxPage: Integer; var APrintRange: TPrintRange;
      AOptions: TPrintDialogOptions): Boolean;
    function PageSetupGetDefaults(var AMargin, AMinMargin: TRect; var APaperSize: TPointF;
      AUnits: TPageMeasureUnits; AOptions: TPageSetupDialogOptions): Boolean;
    function DialogPageSetup(var AMargin, AMinMargin: TRect; var APaperSize: TPointF;
      var AUnits: TPageMeasureUnits; AOptions: TPageSetupDialogOptions): Boolean;
    function DialogSaveFiles(const ADialog: TOpenDialog; var AFiles: TStrings): Boolean;
    function DialogPrinterSetup: Boolean;
    function MessageDialog(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
      const ADefaultButton: TMsgDlgBtn; const AX, AY: Integer; const AHelpCtx: THelpContext;
      const AHelpFileName: string): Integer; overload; deprecated 'Use FMX.DialogService methods';
    procedure MessageDialog(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
      const ADefaultButton: TMsgDlgBtn; const AX, AY: Integer; const AHelpCtx: THelpContext; const AHelpFileName: string;
      const ACloseDialogProc: TInputCloseDialogProc); overload; deprecated 'Use FMX.DialogService methods';
    function InputQuery(const ACaption: string; const APrompts: array of string;
      var AValues: array of string; const ACloseQueryFunc: TInputCloseQueryFunc = nil): Boolean; overload;
      deprecated 'Use FMX.DialogService methods';
    procedure InputQuery(const ACaption: string; const APrompts, ADefaultValues: array of string;
      const ACloseQueryProc: TInputCloseQueryProc); overload; deprecated 'Use FMX.DialogService methods';
  end;

  /// <summary>Interface for Synchronous message dialogs and input queries. See TDialogServiceSync for more information.</summary>
  /// <remarks>Android does not support this inteface.</remarks>
  IFMXDialogServiceSync = interface(IInterface)
    ['{7E6B3966-C08E-466F-B4A0-7996A1C3BA04}']
    /// <summary>Show a simple message box with an 'Ok' button to close it.</summary>
    procedure ShowMessageSync(const AMessage: string);
    /// <summary>Shows custom message dialog with specified buttons on it.</summary>
    function  MessageDialogSync(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
      const ADefaultButton: TMsgDlgBtn; const AHelpCtx: THelpContext): Integer;
    /// <summary>Shows an input message dialog with the specified promps and values on it. Values are modified within it.</summary>
    function  InputQuerySync(const ACaption: string; const APrompts: array of string; var AValues: array of string): Boolean; overload;
  end;

  /// <summary>Interface for Asynchronous message dialogs and input queries.</summary>
  IFMXDialogServiceAsync = interface(IInterface)
    ['{BB65E682-1F27-42E1-90DE-6FA006E09EA5}']
    /// <summary>Show a simple message box with an 'Ok' button to close it.</summary>
    procedure ShowMessageAsync(const AMessage: string); overload;
    /// <summary>Show a simple message box with an 'Ok' button to close it.</summary>
    procedure ShowMessageAsync(const AMessage: string; const ACloseDialogProc: TInputCloseDialogProc); overload;
    /// <summary>Show a simple message box with an 'Ok' button to close it.</summary>
    procedure ShowMessageAsync(const AMessage: string; const ACloseDialogEvent: TInputCloseDialogEvent;
      const AContext: TObject = nil); overload;

    /// <summary>Shows custom message dialog with specified buttons on it.</summary>
    procedure MessageDialogAsync(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
      const ADefaultButton: TMsgDlgBtn; const AHelpCtx: THelpContext; const ACloseDialogProc: TInputCloseDialogProc); overload;
    /// <summary>Shows custom message dialog with specified buttons on it.</summary>
    procedure MessageDialogAsync(const AMessage: string; const ADialogType: TMsgDlgType; const AButtons: TMsgDlgButtons;
      const ADefaultButton: TMsgDlgBtn; const AHelpCtx: THelpContext; const ACloseDialogEvent: TInputCloseDialogEvent;
      const AContext: TObject = nil); overload;

    /// <summary>Shows an input message dialog with the specified promps and values on it. Values are modified within it.</summary>
    procedure InputQueryAsync(const ACaption: string; const APrompts: array of string; const ADefaultValues: array of string;
      const ACloseDialogProc: TInputCloseQueryProc); overload;
    /// <summary>Shows an input message dialog with the specified promps and values on it. Values are modified within it.</summary>
    procedure InputQueryAsync(const ACaption: string; const APrompts: array of string; const ADefaultValues: array of string;
      const ACloseQueryEvent: TInputCloseQueryWithResultEvent; const AContext: TObject = nil); overload;
 end;

  IFMXLoggingService = interface(IInterface)
    ['{01BFC200-0493-4b3b-9D7E-E3CDB1242795}']
    procedure Log(const AFormat: string; const AParams: array of const);
  end;

  IFMXTextService = interface(IInterface)
    ['{A5FECE29-9A9C-4E8A-8794-89271EC71F1A}']
    function GetTextServiceClass: TTextServiceClass;
  end;

  IFMXCanvasService = interface(IInterface)
    ['{476E5E53-A77A-4ADA-93E3-CA66A8956059}']
    procedure RegisterCanvasClasses;
    procedure UnregisterCanvasClasses;
  end;

  IFMXContextService = interface(IInterface)
    ['{EB6C9074-48B9-4A99-ABF4-BFB6FCF9C385}']
    procedure RegisterContextClasses;
    procedure UnregisterContextClasses;
  end;

  IFMXGestureRecognizersService = interface(IInterface)
    ['{5EFE3EC8-FF73-4275-A52A-43B3FCC628D8}']
    procedure AddRecognizer(const ARec: TInteractiveGesture; const AForm: TCommonCustomForm);
    procedure RemoveRecognizer(const ARec: TInteractiveGesture; const AForm: TCommonCustomForm);
  end;

  /// <summary>Reference to a procedure (an anonymous method) that the rendering
  /// setup platform service uses to update rendering parameters.</summary>
  TRenderingSetupCallback = reference to procedure(const Sender, Context: TObject; var ColorBits, DepthBits: Integer;
    var Stencil: Boolean; var Multisamples: Integer);

  /// <summary>Platform service that provides a mechanism to override Direct3D
  /// and OpenGL rendering parameters, which are set before the actual window is
  /// created.</summary>
  IFMXRenderingSetupService = interface(IInterface)
    ['{CFF9D71C-5188-422F-BE5F-DC968D1BFD02}']
    /// <summary> Subscribes callback function to be invoked when Direct3D and OpenGL rendering parameters are being
    /// configured. </summary>
    /// <param name="Callback">Callback function to be registered.</param>
    /// <param name="Context">User-defined context parameter, which will be passed to callback function upon
    /// invocation.</param>
    procedure Subscribe(const Callback: TRenderingSetupCallback; const Context: TObject = nil);
    /// <summary> Removes currently subscribed callback from registry. </summary>
    procedure Unsubscribe;
    /// <summary> Invokes the callback function to configure Direct3D and OpenGL rendering parameters. Before the
    /// callback is invoked, parameters are set to some default values; they are also validated and corrected as needed
    /// after invocation. </summary>
    procedure Invoke(var ColorBits, DepthBits: Integer; var Stencil: Boolean; var Multisamples: Integer);
  end;

  IFMXWindowsTouchService = interface(IInterface)
    ['{216EFB8E-6275-4AE3-BC82-85BEC00C3F5B}']
    procedure HookTouchHandler(const AForm: TCommonCustomForm);
    procedure UnhookTouchHandler(const AForm: TCommonCustomForm);
  end;

{ Listing service (ListBox / ListView) }

  TListingHeaderBehavior = (Sticky);
  TListingHeaderBehaviors = set of TListingHeaderBehavior;

  TListingSearchFeature = (StayOnTop, AsFirstItem);
  TListingSearchFeatures = set of TListingSearchFeature;

  TListingTransitionFeature = (EditMode, DeleteButtonSlide, PullToRefresh, ScrollGlow);
  TListingTransitionFeatures = set of TListingTransitionFeature;

  TListingEditModeFeature = (Delete);
  TListingEditModeFeatures = set of TListingEditModeFeature;

  IFMXListingService = interface(IInterface)
    ['{942C2800-D66E-4094-9B77-BA88A1FBC788}']
    function GetHeaderBehaviors: TListingHeaderBehaviors;
    function GetSearchFeatures: TListingSearchFeatures;
    function GetTransitionFeatures: TListingTransitionFeatures;
    function GetEditModeFeatures: TListingEditModeFeatures;
  end;

  IFMXSaveStateService = interface
    ['{34CB784A-E262-4E2C-B3B6-C3A41B722D7A}']
    function GetBlock(const ABlockName: string; const ABlockData: TStream): Boolean;
    function SetBlock(const ABlockName: string; const ABlockData: TStream): Boolean;
    function GetStoragePath: string;
    procedure SetStoragePath(const ANewPath: string);
    function GetNotifications: Boolean;
    property Notifications: Boolean read GetNotifications;
  end;

{ System Information service }

  TScrollingBehaviour = (BoundsAnimation, Animation, TouchTracking, AutoShowing);

  TScrollingBehaviourHelper = record helper for TScrollingBehaviour
  const
    sbBoundsAnimation = TScrollingBehaviour.BoundsAnimation deprecated 'Use TScrollingBehaviour.BoundsAnimation';
    sbAnimation = TScrollingBehaviour.Animation deprecated 'Use TScrollingBehaviour.Animation';
    sbTouchTracking = TScrollingBehaviour.TouchTracking deprecated 'Use TScrollingBehaviour.TouchTracking';
    sbAutoShowing = TScrollingBehaviour.AutoShowing deprecated 'Use TScrollingBehaviour.AutoShowing';
  end;
  TScrollingBehaviours = set of TScrollingBehaviour;

  IFMXSystemInformationService = interface(IInterface)
    ['{2E01A60B-E297-4AC0-AA24-C5F52289EC1E}']
    { Scrolling information }
    function GetScrollingBehaviour: TScrollingBehaviours;
    function GetMinScrollThumbSize: Single;
    { Caret information }
    function GetCaretWidth: Integer;
    { Menu information }
    function GetMenuShowDelay: Integer;
  end;

  IFMXListViewPresentationService = interface
    ['{2D5DA8DF-BC91-4956-93BA-F4BCE5FB38A0}']
    function AttachPresentation(const Parent: IInterface): IInterface;
    procedure DetachPresentation(const Parent: IInterface);
  end;

  TComponentKind = (Button, &Label, Edit, ScrollBar, ListBoxItem, RadioButton, CheckBox, Calendar);

  TComponentKindHelper = record helper for TComponentKind
  const
    ckButton = TComponentKind.Button deprecated 'Use TComponentKind.Button';
    ckLabel = TComponentKind.Label deprecated 'Use TComponentKind.Label';
    ckEdit = TComponentKind.Edit deprecated 'Use TComponentKind.Edit';
    ckScrollBar = TComponentKind.ScrollBar deprecated 'Use TComponentKind.ScrollBar';
    ckListBoxItem = TComponentKind.ListBoxItem deprecated 'Use TComponentKind.ListBoxItem';
    ckRadioButton = TComponentKind.RadioButton deprecated 'Use TComponentKind.RadioButton';
    ckCheckBox = TComponentKind.CheckBox deprecated 'Use TComponentKind.CheckBox';
  end;

  { Default metrics }

  IFMXDefaultMetricsService = interface(IInterface)
    ['{216841F5-C089-45F1-B350-E9B018B73441}']
    function SupportsDefaultSize(const AComponent: TComponentKind): Boolean;
    function GetDefaultSize(const AComponent: TComponentKind): TSize;
  end;

  { Platform-specific property defaults }

  IFMXDefaultPropertyValueService = interface(IInterface)
    ['{7E8A25A0-5FCF-49FA-990C-CEDE6ABEAE50}']
    function GetDefaultPropertyValue(const AClassName: string; const APropertyName: string): TValue;
  end deprecated 'Use FMX.Platform.Metrics.IFMXPlatformPropertiesService.GetValue instead';

  TCaretBehavior = (DisableCaretInsideWords);
  TCaretBehaviors = set of TCaretBehavior;

  IFMXTextEditingService = interface(IInterface)
    ['{E6CF2889-1403-4853-AFF5-F69DEE8301C1}']
    function GetCaretBehaviors: TCaretBehaviors;
  end deprecated 'Use FMX.Platform.Metrics.IFMXPlatformPropertiesService.GetValue(''DisableCaretInsideWords'') instead';

  { Push notification messages }

  TPushNotificationData = record
    Notification: string;
    constructor Create(const ANotification: string);
  end;
  TPushNotificationMessageBase = class (System.Messaging.TMessage<TPushNotificationData>);

  TPushStartupNotificationMessage = class (TPushNotificationMessageBase);
  TPushRemoteNotificationMessage = class (TPushNotificationMessageBase);

  /// <summary>Data associated to the <c>TPushDeviceTokenMessage</c> message type.</summary>
  /// <remarks>Used only for the iOS platform.</remarks>
  TPushDeviceTokenData = record
    /// <summary>Device token.</summary>
    Token: string;
    /// <summary>Handle to the <c>NSData</c> object (from the Objective-C side) that stores the device token.</summary>
    RawToken: Pointer;
    constructor Create(const AToken: string; ARawToken: Pointer = nil);
  end;
  TPushDeviceTokenMessage = class (System.Messaging.TMessage<TPushDeviceTokenData>);

  TPushFailToRegisterData = record
    ErrorMessage: string;
    constructor Create(const AErrorMessage: string);
  end;
  TPushFailToRegisterMessage = class (System.Messaging.TMessage<TPushFailToRegisterData>);

//== INTERFACE END: FMX.Platform
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.DialogService (from FMX.DialogService.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  /// <summary>Service for managing platform differences in behaviours when showing dialogs. It has a PreferredMode that
  /// can have three values:
  /// Platform  Sync methods for Desktop OS's (Windows and OSX) and ASync for Mobile (Android adn IOS)
  /// Sync      Sync methods are preferred. Used when available (All but Android)
  /// Async     Async methods are preferred. Used when available (All platforms)
  /// </summary>
  TDialogService = class
  public type
    TPreferredMode = (Platform, Async, Sync);

  strict private
    class var FPreferredMode: TPreferredMode;
    class var FInSyncMode: Boolean;
    class procedure SetPreferredMode(const PreferredMode: TPreferredMode); static;

  public
    class constructor ClassCreate;

    /// <summary>Show a simple message box with an 'Ok' button to close it.</summary>
    class procedure ShowMessage(const AMessage: string); overload;
    class procedure ShowMessage(const AMessage: string; const ACloseDialogProc: TInputCloseDialogProc); overload;
    class procedure ShowMessage(const AMessage: string; const ACloseDialogEvent: TInputCloseDialogEvent;
      const AContext: TObject = nil); overload;

    /// <summary>Shows custom message dialog with specified buttons on it.</summary>
    class procedure MessageDialog(const AMessage: string; const ADialogType: TMsgDlgType;
      const AButtons: TMsgDlgButtons; const ADefaultButton: TMsgDlgBtn; const AHelpCtx: THelpContext;
      const ACloseDialogProc: TInputCloseDialogProc); overload;
    class procedure MessageDialog(const AMessage: string; const ADialogType: TMsgDlgType;
      const AButtons: TMsgDlgButtons; const ADefaultButton: TMsgDlgBtn; const AHelpCtx: THelpContext;
      const ACloseDialogEvent: TInputCloseDialogEvent; const AContext: TObject = nil); overload;

    /// <summary>Shows an input message dialog with the specified prompts and values in it.
    /// Values are returned in the callback.</summary>
    class procedure InputQuery(const ACaption: string; const APrompts: array of string; const AValues: array of string;
      const ACloseQueryProc: TInputCloseQueryProc); overload;
    /// <summary>Shows an input message dialog with the specified prompts and values in it.
    /// Values are returned in the callback.</summary>
    class procedure InputQuery(const ACaption: string; const APrompts: array of string; const AValues: array of string;
      const ACloseQueryEvent: TInputCloseQueryWithResultEvent; const AContext: TObject = nil); overload;

    /// <summary>Sets the default presentation mode for dialogs.</summary>
    class property PreferredMode: TPreferredMode read FPreferredMode write SetPreferredMode;
  end;

//== INTERFACE END: FMX.DialogService
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Clipboard (from FMX.Clipboard.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  /// <summary>
  ///   Clipboard support service
  /// </summary>
  IFMXExtendedClipboardService = interface(IFMXClipboardService)
    ['{E96E4776-8234-49F9-B15F-301074E23F70}']
    /// <summary>
    ///   Returns True is clipboard containter text data
    /// </summary>
    function HasText: Boolean;
    /// <summary>
    ///   Gets text data from then clipboard
    /// </summary>
    function GetText: string;
    /// <summary>
    ///   Sets text as a clipboard data
    /// </summary>
    /// <param name="Value">
    ///   Text data to be added to the clipboard.
    /// </param>
    /// <param name="IsSensitive">
    ///   Indicates whether or not the text contains sensitive content, such as password or credit card number.
    ///   Its default value is <c>False</c>.
    /// </param>
    /// <remarks>
    ///   The <c>IsSensitive</c> parameter is only relevant for Android applications that allow users to copy sensitive
    ///   content. Its use is recommended to prevent sensitive content from appearing in the clipboard editor overlay
    ///   introduced in Android 13.
    /// </remarks>
    procedure SetText(const Value: string; IsSensitive: Boolean = False);
    /// <summary>
    ///   Returns True is clipboard containter image data
    /// </summary>
    function HasImage: Boolean;
    /// <summary>
    ///   Gets image data from the clipboard
    /// </summary>
    function GetImage: TBitmapSurface;
    /// <summary>
    ///   Sets image as a clipboard data
    /// </summary>
    procedure SetImage(const Value: TBitmapSurface);
    /// <summary>
    ///   Registers custom clipboard format with <c>AFormatName</c> name
    /// </summary>
    /// <param name="AFormatName">
    ///   Specify the name for the custom format
    /// </param>
    /// <remarks>
    ///   Methods throws <c>EClipboardFormatRegisterError</c> in case format with <c>AFormatName</c> name had already
    ///  registered or thare was a platform error while registration
    /// </remarks>
    procedure RegisterCustomFormat(const AFormatName: string);
    /// <summary>
    ///   Checks wherever custom format is registered
    /// </summary>
    /// <param name="AFormatName">
    ///   Specify the name for the custom format
    /// </param>
    function IsCustomFormatRegistered(const AFormatName: string): Boolean;
    /// <summary>
    ///   Unregister custom clipboard format with <c>AFormatName</c> name
    /// </summary>
    /// <param name="AFormatName">
    ///   Specify the name for the custom format
    /// </param>
    /// <remarks>
    ///   Method throws <c>EClipboardFormatNotRegistered</c> in case format with <c>AFormatName</c> was not registered
    /// </remarks>
    procedure UnregisterCustomFormat(const AFormatName: string);
    /// <summary>
    ///   Checks wherever clipboard contains custom format
    /// </summary>
    /// <param name="AFormatName">
    ///   Specify the name for the custom format
    /// </param>
    /// <returns>
    ///   Returns <c>True</c> if clipboard contains custom format
    /// </returns>
    /// <remarks>
    ///   Method throws <c>EArgumentException</c> in case <c>AFormatName</c> is empty
    ///   Method throws <c>EClipboardFormatNotRegistered</c> in case format with <c>AFormatName</c> was not registered
    /// </remarks>
    function HasCustomFormat(const AFormatName: string): Boolean;
    /// <summary>
    ///   Get data stream for the custom clipboard format
    /// </summary>
    /// <param name="AFormatName">
    ///   Specify the name for the custom format
    /// </param>
    /// <param name="AStream">
    ///   Specify the stream that will get custom format data
    /// </param>
    /// <returns>
    ///   Returns <c>True</c> in case custom format was succesfuly written in <c>AStream</c>
    ///  <c>AFormatName</c> data
    /// </returns>
    /// <remarks>
    ///   Method throws <c>EArgumentException</c> in case <c>AFormatName</c> is empty
    ///   Method throws <c>EArgumentNilException</c> in case <c>AStream</c> is nil
    ///   Method throws <c>EClipboardFormatNotRegistered</c> in case format with <c>AFormatName</c> was not registered
    /// </remarks>
    function GetCustomFormat(const AFormatName: string; const AStream: TStream): Boolean;
    /// <summary>
    ///   Set clipboard data with custom format specified by <c>AFormatName</c> name and data in the <c>AStream</c>
    /// </summary>
    /// <param name="AFormatName">
    ///   Specify the name for the custom format
    /// </param>
    /// <param name="AStream">
    ///   Specify the stream that contains data for the custom format
    /// </param>
    /// <remarks>
    ///   Method throws <c>EArgumentException</c> in case <c>AFormatName</c> is empty
    ///   Method throws <c>EArgumentNilException</c> in case <c>AStream</c> is nil
    ///   Method throws <c>EClipboardFormatNotRegistered</c> in case format with <c>AFormatName</c> was not registered
    /// </remarks>
    procedure SetCustomFormat(const AFormatName: string; const AStream: TStream);
  end;

  /// <summary>
  ///   Basic exception that can be thrown by the methods of the <c>IFMXClipboardService</c>
  /// </summary>
  EClipboardError = class(Exception);
  /// <summary>
  ///   Throws when there was some error while registering custom format
  /// </summary>
  EClipboardFormatRegisterError = class(EClipboardError);
  /// <summary>
  ///   Throws when trying to use custom format methods with format name that wasn't registered
  /// </summary>
  EClipboardFormatNotRegistered = class(EClipboardError);

//== INTERFACE END: FMX.Clipboard
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Objects (from FMX.Objects.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type

{ TShape }

  TShape = class(TControl)
  private
    FFill: TBrush;
    FStroke: TStrokeBrush;
    procedure SetFill(const Value: TBrush);
    procedure SetStroke(const Value: TStrokeBrush);
  protected
    procedure Painting; override;
    procedure FillChanged(Sender: TObject); virtual;
    procedure StrokeChanged(Sender: TObject); virtual;
    function GetShapeRect: TRectF;
    function DoGetUpdateRect: TRectF; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    property Fill: TBrush read FFill write SetFill;
    property Stroke: TStrokeBrush read FStroke write SetStroke;
    property ShapeRect: TRectF read GetShapeRect;
  end;

{ TLine }

  TLineType = (Diagonal, Top, Left, Bottom, Right);

  /// <summary>Specifies the way a line is drawn.</summary>
  TLineLocation = (Boundary, Inner, InnerWithin);

  TLine = class(TShape)
  private
    FLineType: TLineType;
    FShortenLine: Boolean;
    FLineLocation: TLineLocation;
    procedure SetLineType(const Value: TLineType);
    procedure SetShortenLine(const AValue: Boolean);
    procedure SetLineLocation(const AValue: TLineLocation);
  protected
    function DoGetUpdateRect: TRectF; override;
    function IsControlRectEmpty: Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
    procedure Paint; override;
  published
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Locked default False;
    property Height;
    property Hint;
    property HitTest default True;
    /// <summary>Location of th drawing line, see TLineLocation for more information.</summary>
    property LineLocation: TLineLocation read FLineLocation write SetLineLocation default TLineLocation.Boundary;
    property LineType: TLineType read FLineType write SetLineType;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    /// <summary>If True, the line will be shortened its thickness divided by two.</summary>
    property ShortenLine: Boolean read FShortenLine write SetShortenLine default False;
    property Size;
    property Stroke;
    property Visible default True;
    property Width;
    property ParentShowHint;
    property ShowHint;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Mouse events}
    property OnClick;
    property OnDblClick;

    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TRectangle }

  TRectangle = class(TShape)
  private
    FYRadius: Single;
    FXRadius: Single;
    FCorners: TCorners;
    FCornerType: TCornerType;
    FSides: TSides;
    function IsCornersStored: Boolean;
    function IsSidesStored: Boolean;
  protected
    procedure SetXRadius(const Value: Single); virtual;
    procedure SetYRadius(const Value: Single); virtual;
    procedure SetCorners(const Value: TCorners); virtual;
    procedure SetCornerType(const Value: TCornerType); virtual;
    procedure SetSides(const Value: TSides); virtual;
    procedure Paint; override;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property Corners: TCorners read FCorners write SetCorners
      stored IsCornersStored;
    property CornerType: TCornerType read FCornerType write SetCornerType
      default TCornerType.Round;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Fill;
    property Locked default False;
    property Height;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Sides: TSides read FSides write SetSides stored IsSidesStored;
    property Size;
    property Stroke;
    property Visible default True;
    property XRadius: Single read FXRadius write SetXRadius;
    property YRadius: Single read FYRadius write SetYRadius;
    property Width;
    property ParentShowHint;
    property ShowHint;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Mouse events}
    property OnClick;
    property OnDblClick;

    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

  TCaretRectangle = class(TRectangle, IFlasher)
  private
    FFlashTimer: TTimer;
    [weak]FCaret: TCustomCaret;
    FColor: TAlphaColor;
    FPos: TPointF;
    FSize: TSizeF;
    FInterval: TFlasherInterval;
    FSystemInformation: IFMXSystemInformationService;
    procedure FlashTimerProc(Sender: TObject);
    function GetColor: TAlphaColor;
    function GetPos: TPointF;
    function GetSize: TSizeF;
    { IFlasher }
    function GetInterval: TFlasherInterval;
    function GetCaret: TCustomCaret;
    function GetOpacity: Single;
    procedure SetCaret(const Value: TCustomCaret);
  protected
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
    function GetVisible: Boolean; override;
    function DefaultWidth: Integer; virtual;
    function DefaultColor: TAlphaColor; virtual;
    function UseFontColor: Boolean; virtual;
    function DefaultInterval: TFlasherInterval; virtual;
    function GetDefaultSize: TSizeF; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure UpdateState;
    property Caret: TCustomCaret read GetCaret write SetCaret;
  end;

{ TRoundRect }

  TRoundRect = class(TShape)
  private
    FCorners: TCorners;
    function IsCornersStored: Boolean;
  protected
    procedure SetCorners(const Value: TCorners); virtual;
    procedure Paint; override;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property Corners: TCorners read FCorners write SetCorners stored IsCornersStored;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Fill;
    property Locked default False;
    property Height;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property Stroke;
    property Visible default True;
    property Width;
    property ParentShowHint;
    property ShowHint;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Mouse events}
    property OnClick;
    property OnDblClick;

    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TCalloutRectangle }

  TCalloutPosition = (Top, Left, Bottom, Right);

  TCalloutRectangle = class(TRectangle)
  private
    FPath: TPathData;
    FFillPath: TPathData;
    FCalloutWidth: Single;
    FCalloutLength: Single;
    FCalloutPosition: TCalloutPosition;
    FCalloutOffset: Single;
    procedure SetCalloutWidth(const Value: Single);
    procedure SetCalloutLength(const Value: Single);
    procedure SetCalloutPosition(const Value: TCalloutPosition);
    procedure SetCalloutOffset(const Value: Single);
  protected
    procedure RebuildPaths;
    { inherited }
    procedure SetXRadius(const Value: Single); override;
    procedure SetYRadius(const Value: Single); override;
    procedure SetCorners(const Value: TCorners); override;
    procedure SetCornerType(const Value: TCornerType); override;
    procedure SetSides(const Value: TSides); override;
    procedure Resize; override;
    procedure Loaded; override;
    { Building Path }
    function GetCalloutRectangleRect: TRectF;
    procedure AddCalloutToPath(APath: TPathData; const ARect: TRectF; const ACornerRadiuses: TSizeF);
    procedure AddRoundCornerToPath(APath: TPathData; const ARect: TRectF; const ACornerSize: TSizeF; const ACorner: TCorner);
    procedure AddRectCornerToPath(APath: TPathData; const ARect: TRectF; const ACornerSize: TSizeF; const ACorner: TCorner;
      const ASkipEmptySide: Boolean = True);
    procedure CreatePath;
    procedure CreateFillPath;
    { Painting }
    procedure Paint; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Fill;
    property CalloutWidth: Single read FCalloutWidth write SetCalloutWidth;
    property CalloutLength: Single read FCalloutLength write SetCalloutLength;
    property CalloutPosition: TCalloutPosition read FCalloutPosition  write SetCalloutPosition
      default TCalloutPosition.Top;
    property CalloutOffset: Single read FCalloutOffset write SetCalloutOffset;
    property Stroke;
  end;

{ TEllipse }

  TEllipse = class(TShape)
  protected
    procedure Paint; override;
  published
    function PointInObjectLocal(X, Y: Single): Boolean; override;
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Fill;
    property Locked default False;
    property Height;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property Stroke;
    property Visible default True;
    property Width;
    property ParentShowHint;
    property ShowHint;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TCircle }

  TCircle = class(TEllipse)
  protected
    procedure Paint; override;
  end;

{ TPie }

  TPie = class(TEllipse)
  private
    FStartAngle: Single;
    FEndAngle: Single;
    procedure SetEndAngle(const Value: Single);
    procedure SetStartAngle(const Value: Single);
  protected
    procedure Paint; override;
  public
    function PointInObject(X, Y: Single): Boolean; override;
    constructor Create(AOwner: TComponent); override;
  published
    property StartAngle: Single read FStartAngle write SetStartAngle;
    property EndAngle: Single read FEndAngle write SetEndAngle;
  end;

{ TArc }

  TArc = class(TEllipse)
  public const
    DefaultStartAngle = 0;
    DefaultEndAngle = -90;
  private
    FStartAngle: Single;
    FEndAngle: Single;
    procedure SetEndAngle(const Value: Single);
    procedure SetStartAngle(const Value: Single);
  protected
    procedure Paint; override;
    function IsStartAngleStored: Boolean; virtual;
    function IsEndAngleStored: Boolean; virtual;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property StartAngle: Single read FStartAngle write SetStartAngle stored IsStartAngleStored nodefault;
    property EndAngle: Single read FEndAngle write SetEndAngle stored IsEndAngleStored nodefault;
  end;

  TPathWrapMode = (Original, Fit, Stretch, Tile);

{ TCustomPath }

  TCustomPath = class(TShape, IPathObject)
  private
    FData: TPathData;
    FCurrent: TPathData;
    FWrapMode: TPathWrapMode;
    FNeedUpdate: Boolean;
    procedure SetWrapMode(const Value: TPathWrapMode);
    procedure SetPathData(const Value: TPathData);
    { IPathObject }
    function GetPath: TPathData;
  protected
    procedure StrokeChanged(Sender: TObject); override;
    procedure DoChanged(Sender: TObject);
    procedure Paint; override;
    procedure Resize; override;
    procedure Loaded; override;
    procedure UpdateCurrent;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function PointInObject(X, Y: Single): Boolean; override;
    property Data: TPathData read FData write SetPathData;
    property WrapMode: TPathWrapMode read FWrapMode write SetWrapMode default TPathWrapMode.Stretch;
  end;

{ TPath }

  TPath = class(TCustomPath)
  published
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property Data;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Fill;
    property Locked default False;
    property Height;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property Stroke;
    property Visible default True;
    property Width;
    property WrapMode;
    property ParentShowHint;
    property ShowHint;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TText }

  TText = class(TControl, ITextSettings, IObjectState, ICaption)
  protected type
    /// <summary>Accelerator key drawing information.</summary>
    TAcceleratorInfo = class
    private
      FBrush: TStrokeBrush;
      function GetBrush: TStrokeBrush;
    strict private
      FKeyIndex: Integer;
      FIsUnderlineValid: Boolean;
      FUnderlineBeginPoint: TPointF;
      FUnderlineEndPoint: TPointF;
      procedure SetKeyIndex(const Value: Integer);
      function ValidateUnderlinePoints(const AnOwnerControl: TControl; const ACanvas: TCanvas;
        const ALayout: TTextLayout): Boolean;
    public
      destructor Destroy; override;
      /// <summary>Method to indicate that the underline needs to be redrawn.</summary>
      procedure InvalidateUnderline;
      /// <summary>Draws the underline unside the character that holds the accelerator.</summary>
      function DrawUnderline(const AnOwnerControl: TControl; const ACanvas: TCanvas; const ALayout: TTextLayout;
        const AColor: TAlphaColor; const AnOpacity: Single): Boolean;
      /// <summary>Index of the accelerator key.</summary>
      property KeyIndex: Integer read FKeyIndex write SetKeyIndex;
      /// <summary>True if the underline is already generated.</summary>
      property IsUnderlineValid: Boolean read FIsUnderlineValid;
      /// <summary>This brush is used to draw the underline down the accelerator key character.</summary>
      property Brush: TStrokeBrush read GetBrush;
    end;

  private
    FTextSettings: TTextSettings;
    FDefaultTextSettings: TTextSettings;
    FStyledSettings: TStyledSettings;
    FSavedTextSettings: TTextSettings;
    FLayout: TTextLayout;
    FAutoSize: Boolean;
    FStretch: Boolean;
    FIsChanging: Boolean;
    FPrefixStyle: TPrefixStyle;
    FAcceleratorKeyInfo: TAcceleratorInfo;
    procedure SetText(const Value: string);
    procedure DoSetText(const Value: string);
    procedure SetFont(const Value: TFont);
    procedure SetHorzTextAlign(const Value: TTextAlign);
    procedure SetVertTextAlign(const Value: TTextAlign);
    procedure SetWordWrap(const Value: Boolean);
    procedure SetAutoSize(const Value: Boolean);
    procedure SetStretch(const Value: Boolean);
    procedure SetColor(const Value: TAlphaColor);
    procedure SetTrimming(const Value: TTextTrimming);
    procedure SetPrefixStyle(const Value: TPrefixStyle);
    procedure OnFontChanged(Sender: TObject);
    { ITextSettings }
    function GetDefaultTextSettings: TTextSettings;
    function GetTextSettings: TTextSettings;
    function ITextSettings.GetResultingTextSettings = GetTextSettings;
    procedure SetTextSettings(const Value: TTextSettings);
    procedure SetStyledSettings(const Value: TStyledSettings);
    function GetStyledSettings: TStyledSettings;
    function GetColor: TAlphaColor;
    function GetFont: TFont;
    function GetHorzTextAlign: TTextAlign;
    function GetTrimming: TTextTrimming;
    function GetVertTextAlign: TTextAlign;
    function GetWordWrap: Boolean;
    function GetText: string;
    { ICaption }
    function TextStored: Boolean;
  protected
    procedure DefineProperties(Filer: TFiler); override;
    procedure FontChanged; virtual;
    function ConvertText(const Value: string): string; virtual;
    function SupportsPaintStage(const Stage: TPaintStage): Boolean; override;
    function GetTextSettingsClass: TTextSettingsClass; virtual;
    procedure Paint; override;
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    procedure DoRealign; override;
    procedure AdjustSize;
    procedure Resize; override;
    procedure Loaded; override;
    property Layout: TTextLayout read FLayout;
    procedure UpdateDefaultTextSettings; virtual;
    { IObjectState }
    function SaveState: Boolean; virtual;
    function RestoreState: Boolean; virtual;
    /// <summary>Remove the accelerator key information in the control.</summary>
    procedure RemoveAcceleratorKeyInfo;
    /// <summary>Accelerator key underline drawing information.</summary>
    property AcceleratorKeyInfo: TAcceleratorInfo read FAcceleratorKeyInfo;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure AfterConstruction; override;
    procedure SetBounds(X, Y, AWidth, AHeight: Single); override;
    property Font: TFont read GetFont write SetFont;
    property Color: TAlphaColor read GetColor write SetColor;
    property HorzTextAlign: TTextAlign read GetHorzTextAlign write SetHorzTextAlign;
    property Trimming: TTextTrimming read GetTrimming write SetTrimming;
    property VertTextAlign: TTextAlign read GetVertTextAlign write SetVertTextAlign;
    property WordWrap: Boolean read GetWordWrap write SetWordWrap;
  published
    property Align;
    property Anchors;
    property AutoSize: Boolean read FAutoSize write SetAutoSize default False;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Locked default False;
    property Height;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property Stretch: Boolean read FStretch write SetStretch default False;
    property Text: string read GetText write SetText;
    property TextSettings: TTextSettings read GetTextSettings write SetTextSettings;
    /// <summary> Determine the way portraying a single character "&amp;" </summary>
    property PrefixStyle: TPrefixStyle read FPrefixStyle write SetPrefixStyle default TPrefixStyle.HidePrefix;
    property Visible default True;
    property Width;
    property ParentShowHint;
    property ShowHint;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Mouse events}
    property OnClick;
    property OnDblClick;

    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TImage }

  TImage = class;

  TImageMultiResBitmap = class (TFixedMultiResBitmap)
  private
    [Weak] FImage: TImage;
  protected
    procedure Update(Item: TCollectionItem); override;
    function GetDefaultSize: TSize; override;
  end;

  /// <summary> Specifies whether and how to resize, replicate, and position the image for rendering the control surface.</summary>
  TImageWrapMode = (
    /// <summary> Display the image with its original dimensions. </summary>
    Original,
    /// <summary> Stretches image into the LocalRect, preserving aspect ratio. When LocalRect
    /// is bigger than image, the last one will be stretched to fill LocalRect </summary>
    Fit,
    /// <summary> Stretch the image to fill the entire control's rectangle.</summary>
    Stretch,
    /// <summary> Tile (multiply) the image to cover the entire control's rectangle. </summary>
    Tile,
    /// <summary> Center the image to the control's rectangle. </summary>
    Center,
    /// <summary> Places the image inside the LocalRect. If the image is greater
    /// than the LocalRect then the source rectangle is scaled with aspect ratio.
    /// </summary>
    Place
  );

  TImage = class(TControl, IBitmapObject, IMultiResBitmapObject)
  private
    FData: TValue;
    FBitmapMargins: TBounds;
    FWrapMode: TImageWrapMode;
    FDisableInterpolation: Boolean;
    FMarginWrapMode: TImageWrapMode;
    FScaleChangedId: TMessageSubscriptionId;
    FMultiResBitmap: TFixedMultiResBitmap;
    FScreenScale: Single;
    FCurrentScale: Single;
    [weak] FCurrentBitmap: TBitmap;
    FCurrentBitmapUpdating: Boolean;
    procedure SetBitmap(const Value: TBitmap);
    procedure SetWrapMode(const Value: TImageWrapMode);
    procedure SetBitmapMargins(const Value: TBounds);
    procedure SetMarginWrapMode(const Value: TImageWrapMode);
    procedure SetDisableInterpolation(const Value: Boolean);
    procedure ScaleChangedHandler(const Sender: TObject; const Msg: TMessage);
    { IBitmapObject }
    function GetBitmap: TBitmap;
    procedure ReadBitmap(Stream: TStream);
    procedure ReadHiBitmap(Stream: TStream);
    procedure SetMultiResBitmap(const Value: TFixedMultiResBitmap);
    procedure UpdateCurrentBitmap;
    { IMultiResBitmapObject }
    function GetMultiResBitmap: TCustomMultiResBitmap;
  protected
    procedure DoChanged; virtual;
    procedure Paint; override;
    procedure DrawWithMargins(const Canvas: TCanvas; const ARect: TRectF; const ABitmap: TBitmap;
      const AOpacity: Single = 1.0);
    /// <summary> This function tries to find the item in <b>MultiResBitmap</b>, which have the most suitable scale
    /// (see Scene.GetSceneScale).
    /// If <b>IncludeEmpty</b> is true then then returned item can be empty otherwise the empty items are ignored
    /// </summary>
    /// <returns> If successful, the item from the property <b>MultiResBitmap</b> otherwise <c>nil</c> </returns>
    function ItemForCurrentScale(const IncludeEmpty: Boolean): TCustomBitmapItem;
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    function CreateMultiResBitmap: TFixedMultiResBitmap; virtual;
    procedure DefineProperties(Filer: TFiler); override;
    function MultiResBitmapStored: Boolean; virtual;
    function CanObserve(const ID: Integer): Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure DrawBitmap(const Canvas: TCanvas; const ARect: TRectF; const ABitmap: TBitmap; const AOpacity: Single = 1.0);
    property Bitmap: TBitmap read GetBitmap write SetBitmap;
  published
    property MultiResBitmap: TFixedMultiResBitmap read FMultiResBitmap write SetMultiResBitmap stored MultiResBitmapStored;
    property Align;
    property Anchors;
    property BitmapMargins: TBounds read FBitmapMargins write SetBitmapMargins;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DisableInterpolation: Boolean read FDisableInterpolation write SetDisableInterpolation default False;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Locked default False;
    property Height;
    property Hint;
    property HitTest default True;
    property Padding;
    property MarginWrapMode: TImageWrapMode read FMarginWrapMode write SetMarginWrapMode default TImageWrapMode.Stretch;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property Visible default True;
    property Width;
    property WrapMode: TImageWrapMode read FWrapMode write SetWrapMode default TImageWrapMode.Fit;
    property ParentShowHint;
    property ShowHint;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Mouse events}
    property OnClick;
    property OnDblClick;

    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TPaintBox }

  TPaintEvent = procedure(Sender: TObject; Canvas: TCanvas) of object;

  TPaintBox = class(TControl)
  private
    FOnPaint: TPaintEvent;
  protected
    procedure Paint; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Locked default False;
    property Height;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property Visible default True;
    property Width;
    property ParentShowHint;
    property ShowHint;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Mouse events}
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint: TPaintEvent read FOnPaint write FOnPaint;
    property OnResize;
    property OnResized;
  end;

{ TSelection }

  TSelection = class(TControl)
  public const
    DefaultColor = $FF1072C5;
  public type
    TGrabHandle = (None, LeftTop, RightTop, LeftBottom, RightBottom);
  private
    FParentBounds: Boolean;
    FOnChange: TNotifyEvent;
    FHideSelection: Boolean;
    FMinSize: Integer;
    FOnTrack: TNotifyEvent;
    FProportional: Boolean;
    FGripSize: Single;
    FRatio: Single;
    FActiveHandle: TGrabHandle;
    FHotHandle: TGrabHandle;
    FDownPos: TPointF;
    FShowHandles: Boolean;
    FColor: TAlphaColor;
    procedure SetHideSelection(const Value: Boolean);
    procedure SetMinSize(const Value: Integer);
    procedure SetGripSize(const Value: Single);
    procedure ResetInSpace(const ARotationPoint: TPointF; ASize: TPointF);
    function GetProportionalSize(const ASize: TPointF): TPointF;
    function GetHandleForPoint(const P: TPointF): TGrabHandle;
    procedure GetTransformLeftTop(AX, AY: Single; var NewSize: TPointF; var Pivot: TPointF);
    procedure GetTransformLeftBottom(AX, AY: Single; var NewSize: TPointF; var Pivot: TPointF);
    procedure GetTransformRightTop(AX, AY: Single; var NewSize: TPointF; var Pivot: TPointF);
    procedure GetTransformRightBottom(AX, AY: Single; var NewSize: TPointF; var Pivot: TPointF);
    procedure MoveHandle(AX, AY: Single);
    procedure SetShowHandles(const Value: Boolean);
    procedure SetColor(const Value: TAlphaColor);
  protected
    function DoGetUpdateRect: TRectF; override;
    procedure Paint; override;
    ///<summary>Draw grip handle</summary>
    procedure DrawHandle(const Canvas: TCanvas; const Handle: TGrabHandle; const Rect: TRectF); virtual;
    ///<summary>Draw frame rectangle</summary>
    procedure DrawFrame(const Canvas: TCanvas; const Rect: TRectF); virtual;
  public
    function PointInObjectLocal(X, Y: Single): Boolean; override;
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure DoMouseLeave; override;
    ///<summary>Grip handle where mouse is hovered</summary>
    property HotHandle: TGrabHandle read FHotHandle;
  published
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    ///<summary>Selection frame and handle's border color</summary>
    property Color: TAlphaColor read FColor write SetColor default DefaultColor;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property GripSize: Single read FGripSize write SetGripSize;
    property Locked default False;
    property Height;
    property HideSelection: Boolean read FHideSelection write SetHideSelection;
    property Hint;
    property HitTest default True;
    property Padding;
    property MinSize: Integer read FMinSize write SetMinSize default 15;
    property Opacity;
    property Margins;
    property ParentBounds: Boolean read FParentBounds write FParentBounds default True;
    property Proportional: Boolean read FProportional write FProportional;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    ///<summary>Indicates visibility of handles</summary>
    property ShowHandles: Boolean read FShowHandles write SetShowHandles;
    property Visible default True;
    property Width;
    property ParentShowHint;
    property ShowHint;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Mouse events}
    property OnClick;
    property OnDblClick;

    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    property OnTrack: TNotifyEvent read FOnTrack write FOnTrack;
  end;

{ TSelectionPoint }

  TOnChangeTracking = procedure (Sender: TObject; var X, Y: Single) of object;

  TSelectionPoint = class(TStyledControl)
  private
    FParentBounds: Boolean;
    FGripSize: Single;
    FGripCenter: TPosition;
    FPressed: Boolean;
    FStylized: Boolean;
    FAutodetectPointLocation: Boolean;
    FBackgroundRect: TRectF;
    FOnChange: TNotifyEvent;
    FOnChangeTrack: TOnChangeTracking;
    procedure SetGripSize(const Value: Single);
    procedure SetGripCenter(const Value: TPosition);
    function GetBackgroundRectForNonStyle: TRectF;
  protected
    procedure Paint; override;
    procedure SetHeight(const Value: Single); override;
    procedure SetWidth(const Value: Single); override;
    function DoGetUpdateRect: TRectF; override;
    procedure DoGesture(const EventInfo: TGestureEventInfo; var Handled: Boolean); override;
    procedure DoMouseEnter; override;
    procedure DoMouseLeave; override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure DoChangeTracking(var X, Y: Single);
    procedure DoChange;
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function PointInObjectLocal(X, Y: Single): Boolean; override;
    property BackgroundRect: TRectF read FBackgroundRect;
  published
    property Align;
    property Anchors;
    /// <summary></summary>
    /// <remarks>Relevant only when control uses style.</remarks>
    property AutodetectPointLocation: Boolean read FAutodetectPointLocation write FAutodetectPointLocation default False;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property GripSize: Single read FGripSize write SetGripSize;
    property GripCenter: TPosition read FGripCenter write SetGripCenter;
    property Locked default False;
    property Height;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property ParentBounds: Boolean read FParentBounds write FParentBounds default True;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TouchTargetExpansion;
    property Visible default True;
    property Width;
    property ParentShowHint;
    property ShowHint;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Mouse events}
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    property OnTrack: TOnChangeTracking read FOnChangeTrack write FOnChangeTrack;
  end;

//== INTERFACE END: FMX.Objects
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.StdActns (from FMX.StdActns.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


const
  DefaultMaxValue = 100.0;

type
  /// <summary>This action executes in order to trigger the OnHint event on all
  /// the hint receivers in the active form.</summary>
  THintAction = class(TCustomAction)
  public
    /// <summary>Default constructor.</summary>
    constructor Create(AOwner: TComponent); override;
    /// <summary>This execution causes all the hint receivers registered in the active form to be triggered.</summary>
    function Execute: Boolean; override;
  published
    property Hint;
  end;

  TSysCommonAction = class (TCustomAction)
  private
    FOnCanActionExec: TCanActionExecEvent;
  protected
    function GetDefaultText(const Template: string): string;
    function CanActionExec: Boolean; virtual;
  public
    function Update: Boolean; override;
  published
    property CustomText;
    property Enabled;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property ImageIndex;
    property ShortCut;
    property SecondaryShortCuts;
    property Visible;
    property UnsupportedArchitectures;
    property OnCanActionExec: TCanActionExecEvent read FOnCanActionExec write FOnCanActionExec;
    property OnUpdate;
    property OnHint;
  end;

  TFileExit = class(TSysCommonAction)
  protected
    function IsSupportedInterface: Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
    function HandlesTarget(Target: TObject): Boolean; override;
    procedure ExecuteTarget(Target: TObject); override;
    procedure CustomTextChanged; override;
  published
    property ShortCut default scCommand or vkQ;
    property UnsupportedPlatforms default [TOSVersion.TPlatform.pfiOS];
  end;

  TWindowClose = class(TSysCommonAction)
  public
    function HandlesTarget(Target: TObject): Boolean; override;
    procedure ExecuteTarget(Target: TObject); override;
    procedure CustomTextChanged; override;
    function Update: Boolean; override;
    constructor Create(AOwner: TComponent); override;
  published
    property ShortCut default scCommand or vkW;
    property UnsupportedPlatforms;
    property OnExecute;
  end;

  TFileHideApp = class(TSysCommonAction)
  private
    FHideAppService: IFMXHideAppService;
  protected
    function IsSupportedInterface: Boolean; override;
  public
    function HandlesTarget(Target: TObject): Boolean; override;
    procedure ExecuteTarget(Target: TObject); override;
    procedure CustomTextChanged; override;
    function Update: Boolean; override;
    constructor Create(AOwner: TComponent); override;
  published
    property ShortCut default scCommand or vkH;
    property UnsupportedPlatforms default TOSVersion.AllPlatforms - [TOSVersion.TPlatform.pfMacOS];
    property OnExecute;
  end;

  TFileHideAppOthers = class(TFileHideApp)
  private
  public
    procedure ExecuteTarget(Target: TObject); override;
    procedure CustomTextChanged; override;
    constructor Create(AOwner: TComponent); override;
  published
    property ShortCut default scAlt or scCommand or vkH;
  end;

  TObjectViewAction = class (TCustomViewAction)
  private
    procedure SetFmxObject(const Value: TFmxObject);
    function GetFmxObject: TFmxObject;
  protected
    procedure SetComponent(const Value: TComponent); override;
    function ComponentText: string; override;
    procedure DoCreateComponent(var NewComponent: TComponent); override;
  public
    property FmxObject: TFmxObject read GetFmxObject write SetFmxObject;
  end;

  TVirtualKeyboard = class(TObjectViewAction)
  private
    FService: IFMXVirtualKeyboardService;
  protected
  public
    function IsSupportedInterface: Boolean; override;
    procedure ExecuteTarget(Target: TObject); override;
    function Update: Boolean; override;
  published
    property Text;
    property Enabled;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property ImageIndex;
    property ShortCut;
    property SecondaryShortCuts;
    property Visible;
    property UnsupportedArchitectures;
    property UnsupportedPlatforms;
    property OnUpdate;
    property FmxObject;
  end;

{ TViewAction }

  TViewAction = class (TObjectViewAction)
  private
  protected
    procedure SetComponent(const Value: TComponent); override;
  public
    procedure ExecuteTarget(Target: TObject); override;
    function Update: Boolean; override;
  published
    property Text;
    property Enabled;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property ImageIndex;
    property ShortCut;
    property SecondaryShortCuts;
    property Visible;
    property UnsupportedArchitectures;
    property UnsupportedPlatforms;
    property OnUpdate;
    property FmxObject;
    property OnCreateComponent;
    property OnBeforeShow;
    property OnAfterShow;
  end;

  /// <summary>This class associates a floating-point number Value with methods
  /// and properties used for handling Value between the values specified by Min
  /// and Max.</summary>
  TBaseValueRange = class (TPersistent)
  private
    FMax: Double;
    FMin: Double;
    FViewportSize: Double;
    FFrequency: Double;
    FValue: Double;
  protected
  public
    property Min: Double read FMin write FMin;
    property Max: Double read FMax write FMax;
    property Value: Double read FValue write FValue;
    property Frequency: Double read FFrequency write FFrequency;
    property ViewportSize: Double read FViewportSize write FViewportSize;
    procedure Assign(Source: TPersistent); override;
    function Equals(Obj: TObject): Boolean; override;
    function Same(Obj: TBaseValueRange): Boolean; virtual;

  end;

  TCustomValueRangeClass = class of TCustomValueRange;

  /// <summary>Extends the TBaseValueRange class providing methods and
  /// properties used to control the correctness of the Value handling within
  /// its Min to Max range.</summary>
  TCustomValueRange = class (TBaseValueRange)
  private
    FInitialized: Boolean;
    [Weak] FOwner: TComponent;
    FOwnerAction: TCustomAction;
    FNew: TBaseValueRange;
    FOld: TBaseValueRange;
    FTmp: TBaseValueRange;
    FRelativeValue: Double;
    FUpdateCount: Integer;
    FChanging: Boolean;
    FIsChanged: Boolean;
    FBeforeChange: TNotifyEvent;
    FAfterChange: TNotifyEvent;
    FOnChanged: TNotifyEvent;
    FTracking: Boolean;
    FOnTrackingChange: TNotifyEvent;
    FIncrement: Double;
    FLastValue: Double;
    procedure IntChanged;
    function GetMax: Double; inline;
    procedure SetMax(const AValue: Double);
    function GetMin: Double; inline;
    procedure SetMin(const AValue: Double);
    function GetValue: Double; inline;
    procedure SetValue(const AValue: Double);
    function GetFrequency: Double; inline;
    procedure SetFrequency(const AValue: Double);
    function GetViewportSize: Double; inline;
    procedure SetViewportSize(const AValue: Double);
    procedure SetRelativeValue(const AValue: Double);
    procedure SetTracking(const Value: Boolean);
    procedure SetIncrement(const Value: Double);
  protected
    procedure DoBeforeChange; virtual;
    procedure DoChanged; virtual;
    procedure DoAfterChange; virtual;
    procedure DoTrackingChange; virtual;
    property Initialized: Boolean read FInitialized;
    function GetOwner: TPersistent; override;

    function MaxStored: Boolean; virtual;
    function MinStored: Boolean; virtual;
    function ValueStored: Boolean; virtual;
    function FrequencyStored: Boolean; virtual;
    function ViewportSizeStored: Boolean; virtual;
  public
    constructor Create(AOwner: TComponent); virtual;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    function GetNamePath: string; override;
    /// <summary>
    /// This function returns True, if all the properties (Min, Max, Value, etc.) have default values.
    /// </summary>
    function IsEmpty: Boolean; virtual;
    /// <summary>
    ///   Sets default values to all properties (Min, Max, Value, etc.).
    /// </summary>
    procedure Clear; virtual;
    /// <summary>
    ///  If this property is true, the event BeforeChange, AfterChange occur with any change.
    ///  Otherwise, they occur only after the property is accept the truth.
    /// </summary>
    property Tracking: Boolean read FTracking write SetTracking;
    /// <summary>
    ///  This method is caused after property Min, Max, Value, etc. set new values.
    ///  If the owner is loading, or UpdateCount > 0 then events calling, else IsChanged property accepts value true.
    /// </summary>
    /// <param name="IgnoreLoading">
    ///  If this parameter is set to True, then the state csLoading ignored
    /// </param>
    /// <remarks>
    ///  After loading, the owner shall check value of IsChanged property and call the Changed method
    ///  </remarks>
    procedure Changed(const IgnoreLoading: Boolean = false);
    property IsChanged: Boolean read FIsChanged;
    /// <summary>
    /// The new values. see <see cref="BeforeChange"/>
    /// </summary>
    property New: TBaseValueRange read FNew;
    property Min: Double read GetMin write SetMin stored MinStored nodefault;
    property Max: Double read GetMax write SetMax stored MaxStored nodefault;
    property Value: Double read GetValue write SetValue stored ValueStored nodefault;
    property Frequency: Double read GetFrequency write SetFrequency stored FrequencyStored nodefault;
    property ViewportSize: Double read GetViewportSize write SetViewportSize stored ViewportSizeStored nodefault;
    property RelativeValue: Double read FRelativeValue write SetRelativeValue stored False nodefault;

    property LastValue: Double read FLastValue write FLastValue;
    property Increment: Double read FIncrement write SetIncrement;
    function Inc: Boolean;
    function Dec: Boolean;

    property Owner: TComponent read FOwner;
    procedure BeginUpdate;
    procedure EndUpdate;
    property UpdateCount: Integer read FUpdateCount;
    /// <summary>
    /// This property indicates that the class is in a state where is being processed change.
    /// </summary>
    property Changing: Boolean read FChanging;
    /// <summary>
    /// This event is raised before the changes take effect.
    /// Value property, and others contain the old values.
    /// To receive new values, see <see cref="New"/>
    /// </summary>
    /// <remarks>
    ///  This event occurs only if the property Tracking is set to true
    /// </remarks>
    property BeforeChange: TNotifyEvent read FBeforeChange write FBeforeChange;
    /// <summary>
    /// This event is raised after the changes take effect, and before AfterChange.
    /// </summary>
    /// <remarks>
    ///  This event always occurs, even if the property Tracking is set to false
    /// </remarks>
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
    /// <summary>
    /// This event is raised after the changes take effect.
    /// Value property, and others contain the new values.
    /// </summary>
    /// <remarks>
    ///  This event occurs only if the property Tracking is set to true
    /// </remarks>
    property AfterChange: TNotifyEvent read FAfterChange write FAfterChange;
    /// <summary>
    /// This event is raised after the property Tracking has changed
    /// </summary>
    property OnTrackingChange: TNotifyEvent read FOnTrackingChange write FOnTrackingChange;
  end;

  /// <summary>Extends the TCustomValueRange class declaring Value, Min, Max,
  /// and some other properties to be published.</summary>
  TValueRange = class (TCustomValueRange)
  published
    property Min;
    property Max;
    property Value;
    property Frequency;
    property ViewportSize;
    property RelativeValue;
  end;

  /// <summary>The base class for actions (without published properties) that
  /// can be used by controls having ValueRange-type properties.</summary>
  TCustomValueRangeAction = class (TCustomControlAction)
  private
    FValueRange: TCustomValueRange;
    function GetValueRange: TCustomValueRange;
    procedure SetValueRange(const Value: TCustomValueRange);
  protected
    function CreateValueRange: TCustomValueRange; virtual;
    procedure Loaded; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    property ValueRange: TCustomValueRange read GetValueRange write SetValueRange;
  end;

  /// <summary>Class that can be used by controls having ValueRange-type
  /// properties.</summary>
  TValueRangeAction = class (TCustomValueRangeAction)
  protected
    function CreateValueRange: TCustomValueRange; override;
  published
    property AutoCheck;
    property Text;
    property Checked;
    property Enabled;
    property GroupIndex;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property ShortCut;
    property SecondaryShortCuts;
    property Visible;
    property UnsupportedArchitectures;
    property UnsupportedPlatforms;
    property OnExecute;
    property OnUpdate;
    property PopupMenu;
    property ValueRange;
  end;

  /// <summary>Class responsible for the communication between an action of type
  /// TValueRangeAction and a control that implements the IValueRange
  /// interface.</summary>
  TValueRangeActionLink = class (TControlActionLink)
  protected
    function IsValueRangeLinked: Boolean;
    procedure SetValueRange(const AValue: TBaseValueRange); virtual;
  end;

  /// <summary>This interface declares methods for setting and getting the
  /// ValueRange property.</summary>
  IValueRange = interface
    ['{6DFA65EF-A8BF-4D58-9655-664B50C30312}']
    function GetValueRange: TCustomValueRange;
    procedure SetValueRange(const AValue: TCustomValueRange);
    property ValueRange: TCustomValueRange read GetValueRange write SetValueRange;
  end;


//== INTERFACE END: FMX.StdActns
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Styles.Objects (from FMX.Styles.Objects.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  TStyleTrigger = (MouseOver, Pressed, Selected, Focused, Checked, Active);

{ Image Objects }

  TBitmapLink = class(TCollectionItem)
  private
    FCapInsetsChanged: Boolean;
    FCapInsets: TBounds;
    FSourceRect: TBounds;
    FScale: Single;
    procedure SetCapInsets(const Value: TBounds);
    procedure SetSourceRect(const Value: TBounds);
    procedure SetScale(const Value: Single);
    procedure DoCapInsetsChanged(Sender: TObject);
    function IsScaleStored: Boolean;
  public
    constructor Create(Collection: TCollection); override;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    property CapInsetsChanged: Boolean read FCapInsetsChanged;
  published
    property CapInsets: TBounds read FCapInsets write SetCapInsets;
    property Scale: Single read FScale write SetScale stored IsScaleStored;
    property SourceRect: TBounds read FSourceRect write SetSourceRect;
  end;

  TCapWrapMode = (Stretch, Tile);

  TBitmapLinks = class(TCollection)
  public type
    TPropertyLoader = class
    private
      FFiler: TFiler;
      FInstance: TBitmapLinks;
      FPropertyName: string;
      procedure ReadBitmapMargin(Reader: TReader);
      procedure ReadSourceRect(Reader: TReader);
      procedure ReadBitmapMargin15x(Reader: TReader);
      procedure ReadSourceRect15x(Reader: TReader);
      procedure ReadBitmapMargin20x(Reader: TReader);
      procedure ReadSourceRect20x(Reader: TReader);
      procedure ReadBitmapMargin30x(Reader: TReader);
      procedure ReadSourceRect30x(Reader: TReader);
      function FindOrCreateBitmapLink(const Scale: Single): TBitmapLink;
      procedure ReadBitmapLinkSourceRect(Reader: TReader; const Scale: Single);
      procedure ReadBitmapLinkCapInsets(Reader: TReader; const Scale: Single);
    public
      constructor Create(const AInstance: TBitmapLinks; const AFiler: TFiler; const APropertyName: string = '');
      procedure ReadSourceRects;
      procedure ReadCapInsets;
      property Instance: TBitmapLinks read FInstance;
      property PropertyName: string read FPropertyName;
      property Filer: TFiler read FFiler;
    end;
  private
    function GetLink(AIndex: Integer): TBitmapLink;
    function GetEmpty: Boolean;
  public
    constructor Create;
    procedure AssignCapInsets(const Source: TBitmapLinks);
    function LinkByScale(const AScale: Single; const ExactMatch: Boolean): TBitmapLink;
    property Links[AIndex: Integer]: TBitmapLink read GetLink;
    property Empty: Boolean read GetEmpty;
  end;

  TCustomStyleObject = class(TControl, IDrawableObject)
  public type
    TTintStage = (Undefined, Shadow, Mask, Shine);
  private
    FOpaque: Boolean;
    FSource: TImage;
    FSourceLookup: string;
    FCapMode: TCapWrapMode;
    FWrapMode: TImageWrapMode;
    FTintColor: TAlphaColor;
    FTintBuffer: TBitmap;
    FNeedsUpdateTintBuffer: Boolean;
    FTintStage: TTintStage;
    procedure SetCapMode(const Value: TCapWrapMode);
    procedure SetWrapMode(const Value: TImageWrapMode);
    procedure ReadOpaque(Reader: TReader);
    procedure WriteOpaque(Writer: TWriter);
    procedure SetOpaque(const Value: Boolean);
    procedure SetSource(const Value: TImage);
    procedure SetSourceLookup(const Value: string);
    procedure ReadMarginWrapMode(Reader: TReader);
  class var
    FAlignToPixels: Boolean;
  protected
    procedure DefineProperties(Filer: TFiler); override;
    procedure Paint; override;
    procedure FreeNotification(AObject: TObject); override;
    procedure DoDrawToCanvas(const Canvas: TCanvas; const ARect: TRectF; const AOpacity: Single = 1.0);
    function DoGetUpdateRect: TRectF; override;
  protected
    function GetCurrentLink: TBitmapLinks; virtual; abstract;
    function GetCanBeTinted: Boolean; virtual;
    procedure PrepareTintBuffer(const Canvas: TCanvas; const ATintColor: TAlphaColor);
    procedure NeedsUpdateTintBuffer;
    procedure SetTintColor(const ATintColor: TAlphaColor);
    property CanBeTinted: Boolean read GetCanBeTinted;
    property TintColor: TAlphaColor read FTintColor write SetTintColor;
    property TintStage: TTintStage read FTintStage;
    property TintBuffer: TBitmap read FTintBuffer;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure DrawToCanvas(const Canvas: TCanvas; const ARect: TRectF; const AOpacity: Single = 1.0); overload; inline;
    procedure DrawToCanvas(const Canvas: TCanvas; const ARect: TRectF; const ATintColor: TAlphaColor;
      const AOpacity: Single = 1.0); overload;
    function IsEmpty: Boolean;
    property Opaque: Boolean read FOpaque write SetOpaque;
    property Source: TImage read FSource write SetSource;
    class function ScreenScaleToStyleScale(const ScreenScale: Single): Single;
    class property AlignToPixels: Boolean read FAlignToPixels write FAlignToPixels;
  published
    property Align;
    property Anchors;
    property CapMode: TCapWrapMode read FCapMode write SetCapMode default TCapWrapMode.Stretch;
    property CanParentFocus;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Locked default False;
    property Height;
    property HitTest default False;
    property Padding;
    property Opacity;
    property Margins;
    property SourceLookup: string read FSourceLookup write SetSourceLookup;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Size;
    property Scale;
    property WrapMode: TImageWrapMode read FWrapMode write SetWrapMode default TImageWrapMode.Stretch;
    property Visible default True;
    property Width;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnKeyDown;
    property OnKeyUp;
    property OnCanFocus;
    property OnClick;
    property OnDblClick;
    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

  TStyleObject = class(TCustomStyleObject)
  private
    FSourceLink: TBitmapLinks;
    procedure SetSourceLink(const Value: TBitmapLinks);
  protected
    function GetCurrentLink: TBitmapLinks; override;
    procedure DefineProperties(Filer: TFiler); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property SourceLink: TBitmapLinks read FSourceLink write SetSourceLink;
  end;

  ///<summary>Helpers class that incapsulated touch animation behavior, that should be attached to other style object.</summary>
  TTouchAnimationAdapter = class(TPersistent)
  public type
    TAnimationKind = (Pressed, Unpressed);
    TCustomPaint = procedure of object;
  public const
    DefaultUnpressingDuration = 0.3;
    DefaultPressingDuration = 1;
  type
    TTouchAnimation = class(TAnimation)
    private
      [Weak] FAdapter: TTouchAnimationAdapter;
    protected
      procedure ProcessAnimation; override;
    end;
    TTouchAnimationObject = class(TCustomStyleObject)
    private
      [Weak] FAdapter: TTouchAnimationAdapter;
    protected
      function GetCurrentLink: TBitmapLinks; override;
    end;
  private
    [Weak] FStyleObject: TCustomStyleObject;
    FTouchAnimation: TTouchAnimation;
    FTouchAnimationObject: TTouchAnimationObject;
    FLink: TBitmapLinks;
    FPressedPosition: TPointF;
    FPressingDuration: Single;
    FUnpressingDuration: Single;
    FPadding: TBounds;
    FCustomPaint: TCustomPaint;
    procedure SetLink(const Value: TBitmapLinks);
    function PressingDurationStored: Boolean;
    function UnpressingDurationStored: Boolean;
    procedure SetPadding(const Value: TBounds);
    procedure ReadPaddingRect(Reader: TReader);
    procedure CreateTouchAnimation;
  public
    constructor Create(const AStyleObject: TCustomStyleObject); virtual;
    destructor Destroy; override;
    ///<summary>Manually start animation.</summary>
    procedure StartAnimation(const Control: TControl; const Kind: TAnimationKind);
    ///<summary>Manually stop animation.</summary>
    procedure StopAnimation;
    ///<summary>Draw touch animation stage.</summary>
    procedure DrawTouchAnimation(const Canvas: TCanvas; const Rect: TRectF);
    ///<summary>Helpers that used in Owner's StartTriggerAnimation in order to activate touch animation.</summary>
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string);
    ///<summary>Helpers that used in Owner's DefineProperty</summary>
    procedure DefineTouchAnimationProperty(Filer: TFiler);
    ///<summary>Return True if touch animation is available in the style</summary>
    function LinkExists: Boolean;
    ///<summary>Link to Owner</summary>
    property TouchAnimation: TTouchAnimation read FTouchAnimation;
    ///<summary>Callback property called when touch animation runs.</summary>
    property CustomPaint: TCustomPaint read FCustomPaint write FCustomPaint;
  published
    /// <summary>Part of bitmap which used to draw touch animation</summary>
    property Link: TBitmapLinks read FLink write SetLink;
    /// <summary>Duration of animation that started after touch is down</summary>
    property PressingDuration: Single read FPressingDuration write FPressingDuration stored PressingDurationStored;
    /// <summary>Duration of animation that started after touch is up</summary>
    property UnpressingDuration: Single read FUnpressingDuration write FUnpressingDuration
      stored UnpressingDurationStored;
    /// <summary>Size of the border that decreases animation painting rectangle.</summary>
    property Padding: TBounds read FPadding write SetPadding;
  end;

  TTintedStages = class(TPersistent)
  private
    [Weak] FStyleObject: TCustomStyleObject;
    FShadow: TBitmapLinks;
    FMask: TBitmapLinks;
    FShine: TBitmapLinks;
    procedure SetMask(const Value: TBitmapLinks);
    procedure SetShadow(const Value: TBitmapLinks);
    procedure SetShine(const Value: TBitmapLinks);
  public
    constructor Create(const AStyleObject: TCustomStyleObject);
    destructor Destroy; override;
    /// <summary>Link to owner style object</summary>
    property StyleObject: TCustomStyleObject read FStyleObject;
  published
    property Shadow: TBitmapLinks read FShadow write SetShadow;
    property Mask: TBitmapLinks read FMask write SetMask;
    property Shine: TBitmapLinks read FShine write SetShine;
  end;

  TTintedStyleObject = class(TStyleObject, ITintedObject)
  private
    FTint: TTintedStages;
    procedure SetTint(const Value: TTintedStages);
  protected
    function GetCurrentLink: TBitmapLinks; override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure Loaded; override;
    { ITintedObject }
    function GetCanBeTinted: Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Tint: TTintedStages read FTint write SetTint;
  end;

  /// <summary>Interface to access to touch animation adapter</summary>
  ITouchAnimationObject = interface
  ['{75657913-BED4-45CA-A394-B27BF7B2225F}']
    function GetTouchAnimation: TTouchAnimationAdapter;
    /// <summary>Access property to touch animation adapter</summary>
    property TouchAnimation: TTouchAnimationAdapter read GetTouchAnimation;
  end;

  // XE3 Compatible
  TSubImage = class(TStyleObject);

  TActiveStyleObject = class(TCustomStyleObject, ITouchAnimationObject)
  private
    FSourceLink: TBitmapLinks;
    FActive: Boolean;
    FActiveLink: TBitmapLinks;
    FActiveAnimation: TAnimation;
    FTrigger: TStyleTrigger;
    FOnTriggered: TNotifyEvent;
    FTouchAnimation: TTouchAnimationAdapter;
    procedure SetActive(const Value: Boolean);
    procedure SetActiveLink(const Value: TBitmapLinks);
    procedure SetTrigger(const Value: TStyleTrigger);
    procedure SetSourceLink(const Value: TBitmapLinks);
    procedure Triggered(Sender: TObject);
    procedure SetTouchAnimation(const Value: TTouchAnimationAdapter);
    { ITouchAnimationObject }
    function GetTouchAnimation: TTouchAnimationAdapter;
  protected
    procedure DoTriggered; virtual;
    procedure SetupAnimations; virtual;
    function GetCurrentLink: TBitmapLinks; override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure Loaded; override;
    procedure Paint; override;
    property OnTriggered: TNotifyEvent read FOnTriggered write FOnTriggered;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string); override;
    procedure SetNewScene(AScene: IScene); override;
    property Active: Boolean read FActive write SetActive;
  published
    property ActiveTrigger: TStyleTrigger read FTrigger write SetTrigger;
    property ActiveLink: TBitmapLinks read FActiveLink write SetActiveLink;
    property SourceLink: TBitmapLinks read FSourceLink write SetSourceLink;
    ///<summary>Used to add touch animation to the style object</summary>
    property TouchAnimation: TTouchAnimationAdapter read FTouchAnimation write SetTouchAnimation;
  end;

  TTabStyleObject = class(TCustomStyleObject)
  private type
    TTransitionRec = record
      Animation: TAnimation;
      Event: TNotifyEvent;
    end;
  protected type
    TLink = (Active, Source, Hot, ActiveHot, Focused, ActiveFocused);
    TState = (Active, Hot, Focused);
  private
    FBitmapLinks: array [TLink] of TBitmapLinks;
    FTransitions: array [TState] of TTransitionRec;
    FActiveTrigger: TStyleTrigger;
    FState: set of TState;
    procedure SetActiveTrigger(const Value: TStyleTrigger);
    function GetLink(Index: TLink): TBitmapLinks;
    procedure SetLink(Index: TLink; const Value: TBitmapLinks);
    function GetEvent(Index: TState): TNotifyEvent;
    procedure SetEvent(Index: TState; const Value: TNotifyEvent);
    procedure InvokeEvent(Index: TState);

    procedure HotTriggered(Sender: TObject);
    procedure FocusedTriggered(Sender: TObject);
    procedure ActiveTriggered(Sender: TObject);
  protected
    procedure SetupAnimations; virtual;
    function GetCurrentLink: TBitmapLinks; override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure Loaded; override;
    property OnHotTriggered: TNotifyEvent index TLink.Hot read GetEvent write SetEvent;
    property OnFocusedTriggered: TNotifyEvent index TLink.Focused read GetEvent write SetEvent;
    property OnActiveTriggered: TNotifyEvent index TLink.Active read GetEvent write SetEvent;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string); override;
  published
    property ActiveTrigger: TStyleTrigger read FActiveTrigger write SetActiveTrigger;
    property ActiveLink: TBitmapLinks index TLink.Active read GetLink write SetLink;
    property SourceLink: TBitmapLinks index TLink.Source read GetLink write SetLink;
    property HotLink: TBitmapLinks index TLink.Hot read GetLink write SetLink;
    property ActiveHotLink: TBitmapLinks index TLink.ActiveHot read GetLink write SetLink;
    property FocusedLink: TBitmapLinks index TLink.Focused read GetLink write SetLink;
    property ActiveFocusedLink: TBitmapLinks index TLink.ActiveFocused read GetLink write SetLink;
  end;

  TCheckStyleObject = class(TTabStyleObject)
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  end;

  TButtonAnimation = (Normal, Hot, Pressed, Focused);  // Don't change order for compatibility with TFontColorForState.TIndex

  TButtonStyleObject = class(TCustomStyleObject)
  private type
    TTriggerAndLink = record
      Animation: TAnimation;
      Link: TBitmapLinks;
    end;
  private
    FCurrent: TButtonAnimation;
    FTriggerSources: array [TButtonAnimation] of TTriggerAndLink;
    FOnNormalTriggered: TNotifyEvent;
    FOnHotTriggered: TNotifyEvent;
    FOnFocusedTriggered: TNotifyEvent;
    FOnPressedTriggered: TNotifyEvent;
    FTouchAnimation: TTouchAnimationAdapter;
    procedure NormalTriggered(Sender: TObject);
    procedure HotTriggered(Sender: TObject);
    procedure PressedTriggered(Sender: TObject);
    procedure FocusedTriggered(Sender: TObject);
    function GetLink(Index: TButtonAnimation): TBitmapLinks;
    procedure SetLink(Index: TButtonAnimation; const Value: TBitmapLinks);
    procedure SetTouchAnimation(const Value: TTouchAnimationAdapter);
  protected
    procedure DoNormalTriggered;
    procedure DoHotTriggered;
    procedure DoPressedTriggered;
    procedure DoFocusedTriggered;
    function GetCurrentLink: TBitmapLinks; override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure Loaded; override;
    procedure Paint; override;
    property OnNormalTriggered: TNotifyEvent read FOnNormalTriggered write FOnNormalTriggered;
    property OnHotTriggered: TNotifyEvent read FOnHotTriggered write FOnHotTriggered;
    property OnPressedTriggered: TNotifyEvent read FOnPressedTriggered write FOnPressedTriggered;
    property OnFocusedTriggered: TNotifyEvent read FOnFocusedTriggered write FOnFocusedTriggered;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string); override;
  published
    property HotLink: TBitmapLinks index TButtonAnimation.Hot read GetLink write SetLink;
    property FocusedLink: TBitmapLinks index TButtonAnimation.Focused read GetLink write SetLink;
    property NormalLink: TBitmapLinks index TButtonAnimation.Normal read GetLink write SetLink;
    property PressedLink: TBitmapLinks index TButtonAnimation.Pressed read GetLink write SetLink;
    ///<summary>Used to add touch animation to the style object</summary>
    property TouchAnimation: TTouchAnimationAdapter read FTouchAnimation write SetTouchAnimation;
  end;

  TTintedButtonStyleObject = class(TButtonStyleObject, ITintedObject)
  private
    FTintSources: array [TButtonAnimation] of TTintedStages;
    function GetTintStage(const Index: TButtonAnimation): TTintedStages;
    procedure SetTintStage(const Index: TButtonAnimation; const Value: TTintedStages);
  protected
    procedure Loaded; override;
    procedure DefineProperties(Filer: TFiler); override;
    function GetCurrentLink: TBitmapLinks; override;
    { ITintedObject }
    function GetCanBeTinted: Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property HotTint: TTintedStages index TButtonAnimation.Hot read GetTintStage write SetTintStage;
    property NormalTint: TTintedStages index TButtonAnimation.Normal read GetTintStage write SetTintStage;
    property FocusedTint: TTintedStages index TButtonAnimation.Focused read GetTintStage write SetTintStage;
    property PressedTint: TTintedStages index TButtonAnimation.Pressed read GetTintStage write SetTintStage;
  end;

  TSystemButtonObject = class(TButtonStyleObject)
  private
    FInactive: Boolean;
    FInactiveAnimation: TAnimation;
    FInactiveLink: TBitmapLinks;
    procedure SetInactiveLink(const Value: TBitmapLinks);
    procedure InactiveTriggered(Sender: TObject);
  protected
    function GetCurrentLink: TBitmapLinks; override;
    procedure DefineProperties(Filer: TFiler); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string); override;
  published
    property InactiveLink: TBitmapLinks read FInactiveLink write SetInactiveLink;
  end;

  TMaskedImage = class(TImage)
  private
    FContentObject: TCustomStyleObject;
    FBuffer: TBitmap;
    FNeedsUpdate: Boolean;
    procedure PrepareBuffer;
    function GetSourceLookup: string;
    procedure SetSourceLookup(const Value: string);
    procedure ReadMarginWrapMode(Reader: TReader);
    procedure ReadWrapMode(Reader: TReader);
  protected
    function CreateContentObject: TCustomStyleObject; virtual;
    procedure DefineProperties(Filer: TFiler); override;
    procedure DoChanged; override;
    procedure Paint; override;
    procedure NeedsUpdate;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string); override;
  published
    property ContentObject: TCustomStyleObject read FContentObject;
    property SourceLookup: string read GetSourceLookup write SetSourceLookup stored False;
  end;

  TActiveMaskedImage = class(TMaskedImage)
  private
    function GetTrigger: TStyleTrigger;
    procedure SetTrigger(const Value: TStyleTrigger);
    procedure DoTriggered(Sender: TObject);
  protected
    function CreateContentObject: TCustomStyleObject; override;
    procedure DefineProperties(Filer: TFiler); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property ActiveTrigger: TStyleTrigger read GetTrigger write SetTrigger stored False;
  end;

{ Text Objects }

  TStyleShadow = class(TPersistent)
  private
    FColor: TAlphaColor;
    FOnChanged: TNotifyEvent;
    FOffset: TPosition;
    procedure SetColor(const Value: TAlphaColor);
    procedure SetOffset(const Value: TPosition);
  protected
    procedure DoChanged; virtual;
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
  public
    constructor Create;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    function Equals(Obj: TObject): Boolean; override;
  published
    property Color: TAlphaColor read FColor write SetColor default claNull;
    property Offset: TPosition read FOffset write SetOffset;
  end;

  TStyleTextObject = class(TText, IDrawableObject)
  private
    FSavedShadow: TStyleShadow;
    FShadow: TStyleShadow;
    FShadowVisible: Boolean;
    FCharCase: TEditCharCase;
    FCurrentColor: TAlphaColor;
    FCurrentShadow: TStyleShadow;
    procedure SetShadow(const Value: TStyleShadow);
    procedure SetShadowVisible(const Value: Boolean);
    procedure SetCharCase(const Value: TEditCharCase);
    function GetSavedColor: TAlphaColor;
  protected
    procedure Paint; override;
    function ConvertText(const Value: string): string; override;
    procedure ShadowChanged;
    procedure FontChanged; override;
    procedure UpdateDefaultTextSettings; override;
    function UpdateCurrentProperties: Boolean; virtual;
    function SetCurrentProperties(const AColor: TAlphaColorRec; const AShadow: TStyleShadow): Boolean;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure DrawToCanvas(const Canvas: TCanvas; const ARect: TRectF; const AOpacity: Single = 1.0);
    property SavedColor: TAlphaColor read GetSavedColor;
    property SavedShadow: TStyleShadow read FSavedShadow;
    property CurrentColor: TAlphaColor read FCurrentColor;
    property CurrentShadow: TStyleShadow read FCurrentShadow;
  published
    property CharCase: TEditCharCase read FCharCase write SetCharCase default TEditCharCase.ecNormal;
    property Color stored False;
    property Shadow: TStyleShadow read FShadow write SetShadow;
    property ShadowVisible: Boolean read FShadowVisible write SetShadowVisible;
    property HitTest default False;
  end;

  TStyleTextAnimation = class(TAnimation)
  private
    FColor: TAlphaColor;
    FShadow: TStyleShadow;
    procedure SetShadow(const Value: TStyleShadow);
  protected
    procedure ProcessAnimation; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    class function CreateAnimation(const Trigger: string; const Event: TNotifyEvent): TStyleTextAnimation;
    procedure AssignIfEmpty(const StyleTextObject: TStyleTextObject);
    property Color: TAlphaColor read FColor write FColor;
    property Shadow: TStyleShadow read FShadow write SetShadow;
  end;

  TActiveStyleTextObject = class(TStyleTextObject)
  private
    FTrigger: TStyleTrigger;
    FActiveAnimation: TStyleTextAnimation;
    FActive: Boolean;
    FSavedActive: Boolean;
    procedure SetTrigger(const Value: TStyleTrigger);
    function GetActiveColor: TAlphaColor;
    function GetActiveShadow: TStyleShadow;
    procedure SetActiveColor(const Value: TAlphaColor);
    procedure SetActiveShadow(const Value: TStyleShadow);
    procedure SetActive(const Value: Boolean);
  protected
    procedure Triggered(Sender: TObject);
    procedure SetupAnimations; virtual;
    function UpdateCurrentProperties: Boolean; override;
    procedure Loaded; override;
    function SaveState: Boolean; override;
    function RestoreState: Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string); override;
    procedure SetNewScene(AScene: IScene); override;
    property Active: Boolean read FActive write SetActive;
  published
    property ActiveTrigger: TStyleTrigger read FTrigger write SetTrigger;
    property ActiveColor: TAlphaColor read GetActiveColor write SetActiveColor;
    property ActiveShadow: TStyleShadow read GetActiveShadow write SetActiveShadow;
  end;

  TTabStyleTextObject = class(TActiveStyleTextObject)
  private
    FHotAnimation: TStyleTextAnimation;
    FHot: Boolean;
    FSavedHot: Boolean;
    procedure SetHotColor(const Value: TAlphaColor);
    procedure SetHotShadow(const Value: TStyleShadow);
    function GetHotColor: TAlphaColor;
    function GetHotShadow: TStyleShadow;
    procedure SetHot(const Value: Boolean);
  protected
    procedure HotTriggered(Sender: TObject);
    procedure SetupAnimations; override;
    procedure Loaded; override;
    function UpdateCurrentProperties: Boolean; override;
    function SaveState: Boolean; override;
    function RestoreState: Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string); override;
    property Hot: Boolean read FHot write SetHot;
  published
    property HotColor: TAlphaColor read GetHotColor write SetHotColor default claNull;
    property HotShadow: TStyleShadow read GetHotShadow write SetHotShadow;
  end;

  TButtonStyleTextObject = class(TStyleTextObject)
  private
    FTriggerSources: array [TButtonAnimation] of TStyleTextAnimation;
    FButtonState: TButtonAnimation;
    FSavedButtonState: TButtonAnimation;
    procedure NormalTriggered(Sender: TObject);
    procedure HotTriggered(Sender: TObject);
    procedure PressedTriggered(Sender: TObject);
    procedure FocusedTriggered(Sender: TObject);
    function GetColor(Index: TButtonAnimation): TAlphaColor;
    procedure SetColor(Index: TButtonAnimation; const Value: TAlphaColor);
    function GetShadow(Index: TButtonAnimation): TStyleShadow;
    procedure SetShadow(Index: TButtonAnimation; const Value: TStyleShadow);
    procedure SetButtonState(const Value: TButtonAnimation);
    procedure GetFontColors(var AColors, ADefColors: TFontColorForState);
  protected
    procedure Loaded; override;
    procedure UpdateDefaultTextSettings; override;
    function UpdateCurrentProperties: Boolean; override;
    function GetTextSettingsClass: TTextSettingsClass; override;
    function SaveState: Boolean; override;
    function RestoreState: Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string); override;
    property ButtonState: TButtonAnimation read FButtonState write SetButtonState;
  published
    property HotColor: TAlphaColor index TButtonAnimation.Hot read GetColor write SetColor default claNull;
    property HotShadow: TStyleShadow index TButtonAnimation.Hot read GetShadow write SetShadow;
    property FocusedColor: TAlphaColor index TButtonAnimation.Focused read GetColor write SetColor default claNull;
    property FocusedShadow: TStyleShadow index TButtonAnimation.Focused read GetShadow write SetShadow;
    property NormalColor: TAlphaColor index TButtonAnimation.Normal read GetColor write SetColor default claNull;
    property NormalShadow: TStyleShadow index TButtonAnimation.Normal read GetShadow write SetShadow;
    property PressedColor: TAlphaColor index TButtonAnimation.Pressed read GetColor write SetColor default claNull;
    property PressedShadow: TStyleShadow index TButtonAnimation.Pressed read GetShadow write SetShadow;
  end;

  TActiveOpacityObject = class(TControl)
  private
    FTrigger: TStyleTrigger;
    FActiveAnimation: TAnimation;
    FActiveOpacity: Single;
    FSavedOpacity: Single;
    function IsActiveOpacityStored: Boolean;
    procedure SetTrigger(const Value: TStyleTrigger);
    procedure Triggered(Sender: TObject);
  protected
    procedure SetupAnimation; virtual;
    procedure Loaded; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure StartTriggerAnimation(const AInstance: TFmxObject; const ATrigger: string); override;
  published
    property ActiveTrigger: TStyleTrigger read FTrigger write SetTrigger;
    property ActiveOpacity: Single read FActiveOpacity write FActiveOpacity stored IsActiveOpacityStored;
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Locked default False;
    property Height;
    property HitTest default False;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property TouchTargetExpansion;
    property Visible default True;
    property Width;
    { Events }
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    { Drag and Drop events }
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    { Mouse events }
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
  end;

//== INTERFACE END: FMX.Styles.Objects
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.StdCtrls (from FMX.StdCtrls.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type

{ TPresentedTextControl }

  /// <summary>Base class for all presented text controls such as
  /// TLabel.</summary>
  TPresentedTextControl = class(TPresentedControl, ITextSettings, ICaption, IAcceleratorKeyReceiver)
  private
    FTextSettingsInfo: TTextSettingsInfo;
    FTextObject: TControl;
    FITextSettings: ITextSettings;
    FObjectState: IObjectState;
    FText: string;
    FIsChanging: Boolean;
    FPrefixStyle: TPrefixStyle;
    FAcceleratorKey: Char;
    FAcceleratorKeyIndex: Integer;
    function TextStored: Boolean;
    function GetFont: TFont;
    function GetText: string;
    procedure SetFont(const Value: TFont);
    function GetTextAlign: TTextAlign;
    procedure SetTextAlign(const Value: TTextAlign);
    function GetVertTextAlign: TTextAlign;
    procedure SetVertTextAlign(const Value: TTextAlign);
    function GetWordWrap: Boolean;
    procedure SetWordWrap(const Value: Boolean);
    function GetFontColor: TAlphaColor;
    procedure SetFontColor(const Value: TAlphaColor);
    function GetTrimming: TTextTrimming;
    procedure SetTrimming(const Value: TTextTrimming);
    procedure SetPrefixStyle(const Value: TPrefixStyle);
    { ITextSettings }
    function GetDefaultTextSettings: TTextSettings;
    function GetTextSettings: TTextSettings;
    function GetStyledSettings: TStyledSettings;
    function GetResultingTextSettings: TTextSettings;
  protected
    /// <summary>Overrides the TControl.DoRootChanging to register/unregister the control in the form as a
    /// IAcceleratorKeyReceiver if the control has an accelerator key.</summary>
    procedure DoRootChanging(const NewRoot: IRoot); override;
    /// <summary>This function is invoked to filter the text that is going to be displayed. This function doesn't modify the string
    /// stored by the control used as Text property.</summary>
    function DoFilterPresentedText(const AText: string): string; virtual;
    procedure DefineProperties(Filer: TFiler); override;
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    procedure DoStyleChanged; override;
    procedure SetText(const Value: string); virtual;
    /// <summary>Set new value to text property without calling DoTextChanged.</summary>
    procedure SetTextInternal(const Value: string); virtual;
    procedure SetName(const Value: TComponentName); override;
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    procedure Loaded; override;
    /// <summary>Retrieves the resource object linked to the style of the current TextObject.</summary>
    function FindTextObject: TFmxObject; virtual;
    /// <summary>Copy text releated properties to TextObject.</summary>
    procedure UpdateTextObject(const TextControl: TControl; const Str: string);
    /// <summary>Link to object in style that actually displays control's data.</summary>
    property TextObject: TControl read FTextObject;
    /// <summary>Called when text is changed.</summary>
    procedure DoTextChanged; virtual;
    procedure DoEndUpdate; override;
    /// <summary>Return TextObject bounds using current text alignment values.</summary>
    function CalcTextObjectSize(const MaxWidth: Single; var Size: TSizeF): Boolean;
    { ITextSettings }
    procedure SetTextSettings(const Value: TTextSettings); virtual;
    procedure SetStyledSettings(const Value: TStyledSettings); virtual;
    /// <summary>Updates the representation of the text on the control.</summary>
    procedure DoChanged; virtual;
    /// <summary>Retrieves whether any of the default values of font properties that are stored in the StyledSettings property is changed</summary>
    function StyledSettingsStored: Boolean; virtual;
    /// <summary>Use to create new instance of TextSettings object</summary>
    function GetTextSettingsClass: TTextSettingsInfo.TCustomTextSettingsClass; virtual;
    { IAcceleratorKeyReceiver }
    /// <summary>Implements IAcceleratorKeyReceiver.TriggerAcceleratorKey by setting focus to this control.</summary>
    procedure TriggerAcceleratorKey; virtual;
    /// <summary>Implements IAcceleratorKeyReceiver.CanTriggerAcceleratorKey by returning True if this control and all
    /// of its parent controls are visible.</summary>
    function CanTriggerAcceleratorKey: Boolean; virtual;
    /// <summary>Implements IAcceleratorKeyReceiver.GetAcceleratorChar by returning the value stored in FAcceleratorKey.</summary>
    function GetAcceleratorChar: Char;
    /// <summary>Implements IAcceleratorKeyReceiver.GetAcceleratorCharIndex by returning the value stored in
    /// FAcceleratorKeyIndex. This indicates the position within the text string of the accelerator character.</summary>
    function GetAcceleratorCharIndex: Integer;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure AfterConstruction; override;
    function ToString: string; override;
    /// <summary>Specifies the text that will be rendered over the surface of this control</summary>
    property Text: string read GetText write SetText stored TextStored;
    /// <summary>Stores a TTextSettings type object keeping the default values of the text representation properties</summary>
    property DefaultTextSettings: TTextSettings read GetDefaultTextSettings;
    /// <summary>Stores a TTextSettings type object, which handles the text representation properties to be used for drawing the text in this control</summary>
    property TextSettings: TTextSettings read GetTextSettings write SetTextSettings;
    /// <summary>Defines the values of the styled text representation properties</summary>
    property StyledSettings: TStyledSettings read GetStyledSettings write SetStyledSettings stored StyledSettingsStored nodefault;
    /// <summary>Returns a TTextSettings object that declares the text control representation properties</summary>
    property ResultingTextSettings: TTextSettings read GetResultingTextSettings;
    /// <summary>Calls DoChanged when any of the styled text representation properties of the control is changed.</summary>
    procedure Change;
    /// <summary>Specifies the font to use when rendering the text</summary>
    property Font: TFont read GetFont write SetFont;
    /// <summary>Specifies the font color of the text</summary>
    property FontColor: TAlphaColor read GetFontColor write SetFontColor default TAlphaColorRec.Black;
    /// <summary>Specifies how the text will be displayed in terms of vertical alignment.</summary>
    property VertTextAlign: TTextAlign read GetVertTextAlign write SetVertTextAlign default TTextAlign.Center;
    /// <summary>Specifies how the text will be displayed in terms of horizontal alignment.</summary>
    property TextAlign: TTextAlign read GetTextAlign write SetTextAlign default TTextAlign.Leading;
    /// <summary>Specifies whether the text inside the control wraps when it is longer than the width of the control</summary>
    property WordWrap: Boolean read GetWordWrap write SetWordWrap default False;
    /// <summary>Specifies the behavior of the text, when it overflows the area for drawing the text.</summary>
    property Trimming: TTextTrimming read GetTrimming write SetTrimming default TTextTrimming.None;
    /// <summary> Determine the way portraying a single character "&amp;"</summary>
    property PrefixStyle: TPrefixStyle read FPrefixStyle write SetPrefixStyle default TPrefixStyle.HidePrefix;
  end;

{ TPanel }

  TPanel = class(TPresentedControl)
  protected
    function GetDefaultSize: TSizeF; override;
    procedure DefineProperties(Filer: TFiler); override;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Action;
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property TabOrder;
    property TabStop;
    property ParentShowHint;
    property ShowHint;
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnKeyDown;
    property OnKeyUp;
    property OnCanFocus;
    property OnEnter;
    property OnExit;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TCalloutPanel }

  TCalloutPanel = class(TPanel)
  public const
    DefaultCalloutPosition = TCalloutPosition.Top;
    DefaultCalloutWidth = 23;
    DefaultCalloutLength = 11;
  private
    FCalloutRect: TCalloutRectangle;
    FCalloutLength: Single;
    FCalloutWidth: Single;
    FCalloutPosition: TCalloutPosition;
    FCalloutOffset: Single;
    FSavedPadding: TRectF;
    FUpdatingPadding: Boolean;
    procedure SetCalloutLength(const Value: Single);
    procedure SetCalloutPosition(const Value: TCalloutPosition);
    procedure SetCalloutWidth(const Value: Single);
    procedure SetCalloutOffset(const Value: Single);
  protected
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    /// <summary>Updates values: <c>CalloutLength</c>, <c>CalloutWidth</c>, <c>CalloutPosition</c> and
    /// <c>CalloutOffset</c> of <c>CalloutRect</c> object in style</summary>
    procedure UpdateCallout;
    /// <summary>Updates padding based on value of <c>CalloutLength</c> and <c>CalloutPosition</c></summary>
    procedure UpdatePadding;
    /// <summary>Saves current values of padding, which are not equaled to <c>CalloutLength</c></summary>
    procedure SavePadding;
    /// <summary>Restores previous saved value of padding</summary>
    procedure RestorePadding;
    procedure PaddingChanged; override;
  public
    constructor Create(AOwner: TComponent); override;
    /// <summary>Access to style object <c>TCalloutRectangle</c></summary>
    property CalloutRectangle: TCalloutRectangle read FCalloutRect write FCalloutRect;
  published
    property CalloutWidth: Single read FCalloutWidth write SetCalloutWidth;
    property CalloutLength: Single read FCalloutLength write SetCalloutLength;
    property CalloutPosition: TCalloutPosition read FCalloutPosition write SetCalloutPosition
      default DefaultCalloutPosition;
    property CalloutOffset: Single read FCalloutOffset write SetCalloutOffset;
  end;

{ TLabel }

  TLabel = class(TPresentedTextControl)
  private
    FAutoSize: Boolean;
    FPressing: Boolean;
    FIsPressed: Boolean;
    FInFitSize: Boolean;
    FNeedFitSize: Boolean;
    [Weak] FFocusControl: TControl;
    procedure SetAutoSize(const Value: Boolean);
    procedure FitSize;
    procedure SetFocusControl(const Value: TControl);
  protected
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure DefineProperties(Filer: TFiler); override;
    function GetDefaultSize: TSizeF; override;
    procedure Resize; override;
    procedure DoChanged; override;
    procedure ApplyStyle; override;
    function GetTextSettingsClass: TTextSettingsInfo.TCustomTextSettingsClass; override;
    { IAcceleratorKeyReceiver }
    /// <summary>Overrides TPresentedTextControl.TriggerAcceleratorKey</summary>
    procedure TriggerAcceleratorKey; override;
  public
    constructor Create(AOwner: TComponent); override;
    procedure SetNewScene(AScene: IScene); override;
    { triggers }
    property IsPressed: Boolean read FIsPressed;
    property Font;
    property FontColor;
    property TextAlign;
    property VertTextAlign;
    property WordWrap;
    property Trimming;
  published
    property Action;
    property Align;
    property Anchors;
    property AutoSize: Boolean read FAutoSize write SetAutoSize default False;
    property AutoTranslate default True;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property StyledSettings;
    property Locked default False;
    /// <summary>This property is used if the labbel has an accelerator key. If FocusControls supports IAcceleratorKeyReceiver
    /// calls the FocusControl default trigger action. If the IAcceleratorKeyReceiver is not supported, only sets the focus to
    /// FocusControl when the label catches the accelerator key.</summary>
    property FocusControl: TControl read FFocusControl write SetFocusControl;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default False;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TextSettings;
    property Text;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    property TabOrder;
    property TabStop;
    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TCustomButton }

  TCustomButton = class(TPresentedTextControl, IGlyph)
  private
    FPressing: Boolean;
    FIsPressed: Boolean;
    FModalResult: TModalResult;
    FStaysPressed: Boolean;
    FRepeatTimer: TTimer;
    FRepeat: Boolean;
    FTintColor: TAlphaColor;
    FTintObject: ITintedObject;
    FIconTintColor: TAlphaColor;
    FIconTintObject: ITintedObject;
    FIcon: TControl;
    FOldIconVisible: Boolean;
    FGlyph: TGlyph;
    FGlyphSize: TSizeF;
    FImageLink: TGlyphImageLink;
    procedure SetTintColor(const Value: TAlphaColor);
    function IsTintColorStored: Boolean;
    function IsIconTintColorStored: Boolean;
    procedure SetIconTintColor(const Value: TAlphaColor);
    function GetImages: TCustomImageList;
    procedure SetImages(const Value: TCustomImageList);
    { IGlyph }
    function GetImageIndex: TImageIndex;
    procedure SetImageIndex(const Value: TImageIndex);
    function GetImageList: TBaseImageList; inline;
    procedure SetImageList(const Value: TBaseImageList);
    function IGlyph.GetImages = GetImageList;
    procedure IGlyph.SetImages = SetImageList;
    function UpdateGlyphSize: Boolean;
  protected
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    function IsPressedStored: Boolean; virtual;
    procedure RestoreButtonState; virtual;
    procedure ApplyTriggers; virtual;
    procedure SetIsPressed(const Value: Boolean); virtual;
    procedure SetStaysPressed(const Value: Boolean); virtual;
    procedure Click; override;
    procedure DblClick; override;
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    procedure ToggleStaysPressed; virtual;
    procedure DoRealign; override;
    procedure DoRepeatTimer(Sender: TObject);
    procedure DoRepeatDelayTimer(Sender: TObject);
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure KeyDown(var Key: Word; var KeyChar: System.WideChar; Shift: TShiftState); override;
    function GetDefaultSize: TSizeF; override;
    function GetDefaultTouchTargetExpansion: TRectF; override;
    function GetTextSettingsClass: TTextSettingsInfo.TCustomTextSettingsClass; override;
    property TintColor: TAlphaColor read FTintColor write SetTintColor stored IsTintColorStored;
    property TintObject: ITintedObject read FTintObject;
    property IconTintColor: TAlphaColor read FIconTintColor write SetIconTintColor stored IsIconTintColorStored;
    property IconTintObject: ITintedObject read FIconTintObject;
    procedure ImagesChanged; virtual;
    /// <summary> Determines whether the <b>ImageIndex</b> property needs to be stored in the fmx-file</summary>
    /// <returns> <c>True</c> if the <b>ImageIndex</b> property needs to be stored in the fmx-file</returns>
    function ImageIndexStored: Boolean; virtual;
    { IAcceleratorKeyReceiver }
    /// <summary>Overrides the TPresentedTextControl.TriggerAcceleratorKey</summary>
    procedure TriggerAcceleratorKey; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure SetNewScene(AScene: IScene); override;
    property Action;
    property StaysPressed: Boolean read FStaysPressed write SetStaysPressed stored IsPressedStored default False;
    { triggers }
    property IsPressed: Boolean read FIsPressed write SetIsPressed default False;
    property ModalResult: TModalResult read FModalResult write FModalResult default mrNone;
    property RepeatClick: Boolean read FRepeat write FRepeat default False;
    ///<summary> The list of images. Can be <c>nil</c>. <para>See also <b>FMX.ActnList.IGlyph</b></para></summary>
    property Images: TCustomImageList read GetImages write SetImages;
    ///<summary> Zero based index of an image. The default is <c>-1</c>.
    ///<para> See also <b>FMX.ActnList.IGlyph</b></para></summary>
    ///<remarks> If non-existing index is specified, an image is not drawn and no exception is raised</remarks>
    property ImageIndex: TImageIndex read GetImageIndex write SetImageIndex stored ImageIndexStored;
  end;

{ TButton }

  TButton = class(TCustomButton)
  private
    FDefault: Boolean;
    FCancel: Boolean;
  public
    property TintObject;
    property IconTintObject;
  protected
    procedure AfterDialogKey(var Key: Word; Shift: TShiftState); override;
    property Font;
    property TextAlign;
    property Trimming;
    property WordWrap;
  published
    property StaysPressed default False;
    property Action;
    property Align default TAlignLayout.None;
    property Anchors;
    property AutoTranslate default True;
    property Cancel: Boolean read FCancel write FCancel default False;
    property CanFocus default True;
    property CanParentFocus;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Cursor default crDefault;
    property Default: Boolean read FDefault write FDefault default False;
    property DisableFocusEffect;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property StyledSettings;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property IconTintColor;
    property Images;
    property ImageIndex;
    property IsPressed default False;
    property Locked default False;
    property Padding;
    property ModalResult default mrNone;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RepeatClick default False;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property Text;
    property TextSettings;
    property TintColor;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnKeyDown;
    property OnKeyUp;
    property OnCanFocus;
    property OnClick;
    property OnDblClick;
    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

  TSpeedButtonGroupMessage = class(TMessage<string>);

  TSpeedButton = class(TCustomButton, IGroupName, IIsChecked)
  private
    FGroupName: string;
    { IIsChecked }
    function GetIsChecked: Boolean;
    procedure SetIsChecked(const Value: Boolean);
    function IsCheckedStored: Boolean;
    procedure GroupMessageCall(const Sender : TObject; const M : TMessage);
    { IGroupName }
    function GetGroupName: string;
    function GroupNameStored: Boolean;
    procedure SetGroupName(const Value: string);
  protected
    function IsPressedStored: Boolean; override;
    procedure ToggleStaysPressed; override;
    procedure SetIsPressed(const Value: Boolean); override;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    procedure RestoreButtonState; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    property Font;
    property IconTintObject;
    property TextAlign;
    property TintObject;
    property Trimming;
    property WordWrap;
  published
    // do not move this line
    property StaysPressed default False;
    property Action;
    property Align default TAlignLayout.None;
    property Anchors;
    property AutoTranslate default True;
    property CanFocus default False;
    property CanParentFocus;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property GroupName: string read GetGroupName write SetGroupName stored GroupNameStored nodefault;
    property StyledSettings;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property IsPressed default False;
    property IconTintColor;
    property Images;
    property ImageIndex;
    property Locked default False;
    property Padding;
    property ModalResult default mrNone;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RepeatClick default False;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property ParentShowHint;
    property ShowHint;
    property StyleLookup;
    property Text;
    property TextSettings;
    property TintColor;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TCustomCornerButton }

  TCustomCornerButton = class(TCustomButton)
  private
    FYRadius: Single;
    FXRadius: Single;
    FCorners: TCorners;
    FCornerType: TCornerType;
    FSides: TSides;
    function IsCornersStored: Boolean;
    procedure SetXRadius(const Value: Single);
    procedure SetYRadius(const Value: Single);
    procedure SetCorners(const Value: TCorners);
    procedure SetCornerType(const Value: TCornerType);
    procedure SetSides(const Value: TSides);
    function IsSidesStored: Boolean;
  protected
    procedure ApplyStyle; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    property XRadius: Single read FXRadius write SetXRadius;
    property YRadius: Single read FYRadius write SetYRadius;
    property Corners: TCorners read FCorners write SetCorners stored IsCornersStored;
    property CornerType: TCornerType read FCornerType write SetCornerType default TCornerType.Round;
    property Sides: TSides read FSides write SetSides stored IsSidesStored;
  end;

{ TCornerButton }

  TCornerButton = class(TCustomCornerButton)
  public
    property Font;
    property TextAlign default TTextAlign.Center;
    property WordWrap default False;
  published
    property StaysPressed default False;
    property Action;
    property Align;
    property Anchors;
    property AutoTranslate default True;
    property CanFocus default True;
    property CanParentFocus;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Corners;
    property CornerType;
    property Cursor default crDefault;
    property DisableFocusEffect;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property StyledSettings;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Images;
    property ImageIndex;
    { triggers }
    property IsPressed default False;

    property Locked default False;
    property Padding;
    property ModalResult default mrNone;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RepeatClick default False;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Sides;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property Text;
    property TextSettings;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property XRadius;
    property YRadius;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TCheckBox }

  TCheckBox = class(TPresentedTextControl, IIsChecked)
  private
    FPressing: Boolean;
    FOnChange: TNotifyEvent;
    FIsPressed: Boolean;
    FIsChecked: Boolean;
    FIsPan: Boolean;
    function GetIsChecked: Boolean;
    procedure SetIsChecked(const Value: Boolean);
    function IsCheckedStored: Boolean;
  protected
    procedure DoExit; override;
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    function CanObserve(const ID: Integer): Boolean; override;
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    function GetDefaultSize: TSizeF; override;
    function GetTextSettingsClass: TTextSettingsInfo.TCustomTextSettingsClass; override;
    function TryValueIsChecked(const Value: TValue; out IsChecked: Boolean): Boolean;
    { IAcceleratorKeyReceiver }
    /// <summary>Overrides TPresentedTextControl.TriggerAcceleratorKey. The behaviour is to check/uncheck the
    /// box control.</summary>
    procedure TriggerAcceleratorKey; override;
  public
    constructor Create(AOwner: TComponent); override;
    procedure SetNewScene(AScene: IScene); override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure KeyDown(var Key: Word; var KeyChar: System.WideChar; Shift: TShiftState); override;
    property IsPressed: Boolean read FIsPressed default False;
    property Font;
    property TextAlign;
    property WordWrap;
  published
    property Action;
    property Align;
    property Anchors;
    property AutoTranslate default True;
    property CanFocus default True;
    property CanParentFocus;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Cursor default crDefault;
    property DisableFocusEffect;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property StyledSettings;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property IsChecked: Boolean read GetIsChecked write SetIsChecked stored IsCheckedStored default False;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property Text;
    property TextSettings;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TRadioButton }

  TRadioButtonGroupMessage = class(TMessage)
  private
    FGroupName: string;
  public
    constructor Create(const AGroupName: string);
    property GroupName: string read FGroupName;
  end;

  TRadioButton = class(TPresentedTextControl, IGroupName, IIsChecked)
  private
    FPressing: Boolean;
    FOnChange: TNotifyEvent;
    FIsPressed: Boolean;
    FIsChecked: Boolean;
    FGroupName: string;
    function GetIsChecked: Boolean;
    procedure SetIsChecked(const Value: Boolean);
    function IsCheckedStored: Boolean;
    function GetGroupName: string;
    procedure SetGroupName(const Value: string);
    function GroupNameStored: Boolean;
    procedure GroupMessageCall(const Sender : TObject; const M : TMessage);
  protected
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    function GetDefaultSize: TSizeF; override;
    function GetTextSettingsClass: TTextSettingsInfo.TCustomTextSettingsClass; override;
    { IAcceleratorKeyReceiver }
    /// <summary>Overrides TPresentedTextControl.TriggerAcceleratorKey. The behavior is to check the
    /// radio control.</summary>
    procedure TriggerAcceleratorKey; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure SetNewScene(AScene: IScene); override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure KeyDown(var Key: Word; var KeyChar: System.WideChar; Shift: TShiftState); override;
    property IsPressed: Boolean read FIsPressed;
    property TextAlign;
    property Font;
    property WordWrap;
  published
    property Action;
    property Align;
    property Anchors;
    property AutoTranslate default True;
    property CanFocus default True;
    property CanParentFocus;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Cursor default crDefault;
    property DisableFocusEffect;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property StyledSettings;
    property GroupName: string read GetGroupName write SetGroupName stored GroupNameStored nodefault;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    { triggers }
    property IsChecked: Boolean read GetIsChecked write SetIsChecked stored IsCheckedStored default False;

    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property Text;
    property TextSettings;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TGroupBox }

  TGroupBox = class(TPresentedTextControl)
  protected
    procedure DefineProperties(Filer: TFiler); override;
    function GetDefaultSize: TSizeF; override;
    function StyledSettingsStored: Boolean; override;
    function GetTextSettingsClass: TTextSettingsInfo.TCustomTextSettingsClass; override;
  public
    constructor Create(AOwner: TComponent); override;
    property Font;
  published
    property Action;
    property Align;
    property Anchors;
    property AutoTranslate default True;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property StyledSettings;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property Text;
    property TextSettings;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property TabOrder;
    property TabStop;
    property ParentShowHint;
    property ShowHint;
    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;
    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TStatusBar }

  TStatusBar = class(TPresentedControl, IHintReceiver)
  private
    FShowSizeGrip: Boolean;
    FOnHint: TNotifyEvent;
    FAutoHint: Boolean;
    procedure SetShowSizeGrip(const Value: Boolean);
  protected
    procedure ApplyStyle; override;
    procedure DefineProperties(Filer: TFiler); override;
    function GetDefaultSize: TSizeF; override;
    /// <summary>Reimplementation of changing root in order the control to be unregistered from the old root
    /// and registered to the new one. This is useful for the control to be registered on unregistered as a hint
    /// receiver.</summary>
    procedure DoRootChanging(const NewRoot: IRoot); override;
    { IHintReceiver }
    /// <summary>Implementation of IHintReceiver.TriggerOnHint.</summary>
    procedure TriggerOnHint;
    /// <summary>Method to trigger the OnHint event.</summary>
    function DoHint: Boolean; virtual;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Action;
    property Align default TAlignLayout.Bottom;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property ShowSizeGrip: Boolean read FShowSizeGrip write SetShowSizeGrip;
    property Size;
    property StyleLookup;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property TabOrder;
    property TabStop;
    property ParentShowHint;
    property ShowHint;
    /// <summary>Use this property to enable/disable the OnHint event.</summary>
    property AutoHint: Boolean read FAutoHint write FAutoHint default False;
    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;

    /// <summary>Event to be triggered when the application catches a hint.</summary>
    property OnHint: TNotifyEvent read FOnHint write FOnHint;
  end;

{ TToolBar }

  TToolBar = class(TPresentedControl)
  private
    FTintColor: TAlphaColor;
    FTintObject: ITintedObject;
    procedure SetTintColor(const Value: TAlphaColor);
    function IsTintColorStored: Boolean;
  protected
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    procedure DefineProperties(Filer: TFiler); override;
    function GetDefaultSize: TSizeF; override;
  public
    constructor Create(AOwner: TComponent); override;
    property TintObject: ITintedObject read FTintObject;
  published
    property Action;
    property Align default TAlignLayout.Top;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TintColor: TAlphaColor read FTintColor write SetTintColor  stored IsTintColorStored;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnKeyDown;
    property OnKeyUp;
    property OnCanFocus;
    property OnClick;
    property OnDblClick;
    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TSizeGrip }

  TSizeGrip = class(TStyledControl, ISizeGrip)
  protected
    procedure DefineProperties(Filer: TFiler); override;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Action;
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TSplitter }

  TSplitter = class(TStyledControl)
  private
    FPressed: Boolean;
    FControl: TControl;
    FDownPos: TPointF;
    FMinSize: Single;
    FMaxSize: Single;
    FNewSize, FOldSize: Single;
    FSplit: Single;
    FShowGrip: Boolean;
    procedure SetShowGrip(const Value: Boolean);
  protected
    procedure ApplyStyle; override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure Paint; override;
    procedure SetAlign(const Value: TAlignLayout); override;
    function FindObject: TControl;
    procedure CalcSplitSize(X, Y: Single; var NewSize, Split: Single);
    procedure UpdateSize(X, Y: Single);
    function DoCanResize(var NewSize: Single): Boolean;
    procedure UpdateControlSize;
    function GetDefaultSize: TSizeF; override;
  public
    constructor Create(AOwner: TComponent); override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
  published
    property Action;
    property Align;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property MinSize: Single read FMinSize write FMinSize;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property ShowGrip: Boolean read FShowGrip write SetShowGrip default True ;
    property Size;
    property StyleLookup;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property TabStop;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TProgressBar }

  TProgressBar = class(TPresentedControl, IValueRange)
  private
    FOrientation: TOrientation;
    FValueRange: TValueRange;
    FDefaultValueRange: TBaseValueRange;
    procedure SetOrientation(const Value: TOrientation);
    function GetMax: Double;
    function GetMin: Double;
    function GetValue: Double;
    procedure SetMax(const Value: Double);
    procedure SetMin(const Value: Double);
    procedure SetValue(const Value: Double);
    function GetValueRange: TCustomValueRange;
    procedure SetValueRange(const AValue: TCustomValueRange);
    function DefStored: Boolean;
    procedure ChangedProc(Sender: TObject);
    function MaxStored: Boolean;
    function MinStored: Boolean;
    function ValueStored: Boolean;
  protected
    function ChooseAdjustType(const FixedSize: TSize): TAdjustType; override;
    procedure ApplyStyle; override;
    procedure DefineProperties(Filer: TFiler); override;
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    procedure DoRealign; override;
    function GetActionLinkClass: TActionLinkClass; override;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    procedure AfterChangeProc(Sender: TObject); virtual;
    property DefaultValueRange: TBaseValueRange read FDefaultValueRange;
    procedure Loaded; override;
    function GetDefaultSize: TSizeF; override;
  public
    constructor Create(AOwner: TComponent); override;
    procedure AfterConstruction; override;
    destructor Destroy; override;
  published
    property Action;
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property Max: Double read GetMax write SetMax stored MaxStored nodefault;
    property Min: Double read GetMin write SetMin stored MinStored nodefault;
    property Opacity;
    property Orientation: TOrientation read FOrientation write SetOrientation;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TouchTargetExpansion;
    property Value: Double read GetValue write SetValue stored ValueStored nodefault;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TThumb }

  TCustomTrack = class;

  TThumb = class(TStyledControl)
  private
    [Weak] FTrack: TCustomTrack;
    FDownOffset: TPointF;
    FPressed: Boolean;
    function PointToValue(X, Y: Single): Double;
  public
    constructor Create(AOwner: TComponent); override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    function GetDefaultTouchTargetExpansion: TRectF; override;
    property IsPressed: Boolean read FPressed;
  published
    property Action;
    property Align;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

  TMouseDownAction = (&Goto, None);

{ TCustomTrack }

  TCustomTrack = class(TPresentedControl, IValueRange)
  private const
    FirstInterval = 10;
    SecondInterval = 500;
    OtherInterval = 20;
  private
    FValueRange: TValueRange;
    FDefaultValueRange: TBaseValueRange;
    [Weak] FThumb: TThumb;
    FMouseDownAction: TMouseDownAction;
    FPushedValue: Double;
    FPushedSign: TValueSign;
    FPushedShift: TShiftState;
    FPushedTimer: TTimer;
    FSmallChange: Double;
    function GetIsTracking: Boolean;
    procedure SetMax(const Value: Double);
    procedure SetMin(const Value: Double);
    procedure SetValue(Value: Double);
    procedure SetFrequency(const Value: Double);
    procedure SetViewportSize(const Value: Double);
    function GetFrequency: Double;
    function GetMax: Double;
    function GetMin: Double;
    function GetValue: Double;
    function GetViewportSize: Double;
    function GetValueRange: TCustomValueRange;
    procedure SetValueRange(const AValue: TCustomValueRange);
    procedure SetValueRange_(const Value: TValueRange);
    function DefStored: Boolean;
    procedure SetNewValue(const LValue: Double);
    procedure UpdateHighlight;
    function FrequencyStored: Boolean;
    function MaxStored: Boolean;
    function MinStored: Boolean;
    function ValueStored: Boolean;
    function ViewportSizeStored: Boolean;
    procedure ObserversValueUpdate;
    function GetIncrement: Double;
    function DoSmallChange(N: Integer; const TargetValue: Double): Boolean;
    function MousePosToValue(const MousePos: TPointF): Single;
    procedure TimerProc(Sender: TObject);
  protected
    FOnChange, FOnTracking: TNotifyEvent;
    FIgnoreViewportSize: Boolean;
    FOrientation: TOrientation;
    FTracking: Boolean;
    FTrack: TControl;
    FTrackHighlight: TControl;
    FThumbSize: Single;
    FMinThumbSize: Single;
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    function CanObserve(const ID: Integer): Boolean; override;
    procedure SetOrientation(const Value: TOrientation); virtual;
    function GetThumbRect(Value: single): TRectF; overload; virtual;
    function GetThumbRect: TRectF; overload;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure DoMouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single; LValue: Single); virtual;
    procedure KeyDown(var Key: Word; var KeyChar: System.WideChar; Shift: TShiftState); override;
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    function ChooseAdjustType(const FixedSize: TSize): TAdjustType; override;
    function GetDefaultTouchTargetExpansion: TRectF; override;
    procedure DoThumbClick(Sender: TObject); virtual;
    procedure DoThumbDblClick(Sender: TObject); virtual;
    function GetThumbSize(var IgnoreViewportSize: Boolean): Integer; virtual;
    procedure DoRealign; override;
    function GetActionLinkClass: TActionLinkClass; override;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    procedure Loaded; override;
    procedure DoChanged; virtual;
    procedure DoTracking; virtual;
    function GetDefaultSize: TSizeF; override;
    function CreateValueRangeTrack : TValueRange; virtual;
    property MouseDownAction: TMouseDownAction read FMouseDownAction write FMouseDownAction;
    property DefaultValueRange: TBaseValueRange read FDefaultValueRange;
    procedure Resize; override;
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure AfterConstruction; override;
    property ValueRange: TValueRange read FValueRange write SetValueRange_ stored ValueStored;
    property IsTracking: Boolean read GetIsTracking;
    property Min: Double read GetMin write SetMin stored MinStored nodefault;
    property Max: Double read GetMax write SetMax stored MaxStored nodefault;
    property Frequency: Double read GetFrequency write SetFrequency stored FrequencyStored nodefault;
    ///<summary>Controls the number of positions this track bar's thumb moves on each pressing of the free area</summary>
    property SmallChange: Double read FSmallChange write FSmallChange;
    property Value: Double read GetValue write SetValue stored ValueStored nodefault;
    property ViewportSize: Double read GetViewportSize write SetViewportSize stored ViewportSizeStored nodefault;
    property Orientation: TOrientation read FOrientation write SetOrientation;
    property Tracking: Boolean read FTracking write FTracking default True;
    property Thumb: TThumb read FThumb;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    property OnTracking: TNotifyEvent read FOnTracking write FOnTracking;
  end;

{ TTrack }

  TTrack = class(TCustomTrack)
  published
    property Action;
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Frequency;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property Max;
    property Min;
    property Opacity;
    property Orientation;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Tracking;
    property Value;
    property ViewportSize;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnChange;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TTrackBar }

  TTrackBar = class(TCustomTrack)
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Action;
    property Align;
    property Anchors;
    property CanFocus default True;
    property CanParentFocus;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property ControlType;
    property DisableFocusEffect;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Frequency;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property Max;
    property Min;
    property Orientation;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Tracking;
    property Value;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnChange;
    property OnTracking;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TBitmapTrackBar }

  TBitmapTrackBar = class(TTrackBar)
  protected
    FBitmap: TBitmap;
    FBackground: TShape;
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    procedure DoRealign; override;
    function GetDefaultStyleLookupName: string; override;
    procedure UpdateBitmap;
    procedure FillBitmap; virtual;
    procedure SetOrientation(const Value: TOrientation); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  end;

{ TSwitch }

const
  MM_VALUE_CHANGED = MM_USER + 1;

type

  /// <summary>Data model for the TSwitch control.</summary>
  TSwitchModel = class(TDataModel)
  private
    FValue: Boolean;
    FOnSwitch: TNotifyEvent;
    procedure SetValue(AValue: Boolean);
  protected
    /// <summary>Invokes OnSwitch event handler</summary>
    procedure DoChanged; virtual;
  public
    /// <summary>Invokes OnSwitch event handler</summary>
    procedure Change;
  public
    /// <summary>Property representing the boolean value of the switch. When the switch is On, the boolean value is
    /// True. When the switch is Off, the boolean value is False.</summary>
    property Value: Boolean read FValue write SetValue;
    /// <summary>Event handler is called, when <c>TSwitch</c> changed <c>IsChecked</c></summary>
    property OnSwitch: TNotifyEvent read FOnSwitch write FOnSwitch;
  end;

  /// <summary>Represents a two-way on/off switch for use in
  /// applications.</summary>
  TCustomSwitch = class(TPresentedControl, IIsChecked)
  private type
    TNeededToDo = set of (SetChecked, CallClick);
  private
    FNeededToDo: TNeededToDo;
    function GetModel: TSwitchModel; overload;
    procedure SetOnSwitch(const Value: TNotifyEvent);
    function GetOnSwitch: TNotifyEvent;
    { IIsChecked }
    procedure SetIsChecked(const AValue: Boolean);
    function GetIsChecked: Boolean;
    function IsCheckedStored: Boolean;
  protected
    { Actions }
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    function GetActionLinkClass: TActionLinkClass; override;
    { Live Binding }
    function CanObserve(const ID: Integer): Boolean; override;
    procedure SetData(const Value: TValue); override;
    function GetData: TValue; override;
    { Mouse Events }
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure Click; override;
    function GetDefaultTouchTargetExpansion: TRectF; override;
    function DefineModelClass: TDataModelClass; override;
    /// <summary>This virtual method is performed after changing the IsChecked property. By default, it executes the
    /// event handler OnSwitch </summary>
    procedure DoSwitch; virtual;
    function GetDefaultSize: TSizeF; override;
  public
    constructor Create(AOwner: TComponent); override;
    /// <summary>Property to retrieve the data model of the switch control.</summary>
    property Model: TSwitchModel read GetModel;
  public
    /// <summary>True if switch is turned on. Returns False otherwise.</summary>
    property IsChecked: Boolean read GetIsChecked write SetIsChecked stored IsCheckedStored;
    /// <summary>Event handler is being invoked, when switch changes value <c>IsChecked</c>.</summary>
    property OnSwitch: TNotifyEvent read GetOnSwitch write SetOnSwitch;
  end;

  TSwitch = class(TCustomSwitch)
  published
    property Action;
    property Align;
    property Anchors;
    property CanFocus default True;
    property CanParentFocus;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property Hint;
    property HitTest default True;
    property IsChecked;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnKeyDown;
    property OnKeyUp;
    property OnCanFocus;
    property OnClick;
    property OnDblClick;
    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    property OnSwitch;
  end;

{ TScrollBar }

  TScrollBar = class(TStyledControl)
  private
    FValueRange: TValueRange;
    FTrackChanging: Boolean;
    FOnChange: TNotifyEvent;
    FOrientation: TOrientation;
    FTrack: TCustomTrack;
    FMinButton: TCustomButton;
    FMaxButton: TCustomButton;
    FSmallChange: Double;
    FDefaultValueRange: TBaseValueRange;
    procedure SetMax(const Value: Double);
    procedure SetMin(const Value: Double);
    procedure SetValue(const Value: Double);
    procedure SetViewportSize(const Value: Double);
    function GetMax: Double;
    function GetMin: Double;
    function GetValue: Double;
    function GetViewportSize: Double;
    function GetValueRange: TValueRange;
    procedure SetValueRange(const Value: TValueRange);
    procedure SetOrientation(const Value: TOrientation);
    function DefStored: Boolean;
    procedure TrackChangedProc(Sender: TObject);
    procedure FreeTrack;
    function GetSmallChange: Double;
    procedure SetSmallChange(const Value: Double);
    function SmallChangeStored: Boolean;
    function GetIncrement: Double;
    procedure DoSmallChange(N: Integer);
    function MaxStored: Boolean;
    function MinStored: Boolean;
    function ValueStored: Boolean;
    function ViewportSizeStored: Boolean;
  protected
    procedure DoMinButtonClick(Sender: TObject);
    procedure DoMaxButtonClick(Sender: TObject);
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    function CanObserve(const ID: Integer): Boolean; override;
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    procedure KeyDown(var Key: Word; var KeyChar: System.WideChar; Shift: TShiftState); override;
    function GetActionLinkClass: TActionLinkClass; override;
    procedure DoActionClientChanged; override;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    property Track: TCustomTrack read FTrack;
    property MinButton: TCustomButton read FMinButton;
    property MaxButton: TCustomButton read FMaxButton;
    procedure DoChanged; virtual;
    procedure DefineProperties(Filer: TFiler); override;
    function GetDefaultSize: TSizeF; override;
    procedure Loaded; override;
    property DefaultValueRange: TBaseValueRange read FDefaultValueRange;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure AfterConstruction; override;
    property ValueRange: TValueRange read GetValueRange write SetValueRange;
  published
    property Action;
    property Align;
    property Anchors;
    property CanFocus default False;
    property CanParentFocus default False;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property Max: Double read GetMax write SetMax stored MaxStored nodefault;
    property Min: Double read GetMin write SetMin stored MinStored nodefault;
    property Value: Double read GetValue write SetValue stored ValueStored nodefault;
    property ViewportSize: Double read GetViewportSize write SetViewportSize stored ViewportSizeStored nodefault;
    property SmallChange: Double read GetSmallChange write SetSmallChange stored SmallChangeStored nodefault;
    property Orientation: TOrientation read FOrientation write SetOrientation;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TSmallScrollBar }

  TSmallScrollBar = class(TScrollBar)
  protected
    procedure ApplyStyle; override;
    function GetDefaultSize: TSizeF; override;
  public
    constructor Create(AOwner: TComponent); override;
  end;

{ TAniIndicator }

  TAniIndicatorStyle = (Linear, Circular);

  TAniIndicator = class(TStyledControl)
  public const
    DefaultEnabled = False;
  private type
    TRotationControl = class(TControl)
    public
      property RotationAngle;
    end;
  private
    FLayout: TControl;
    FAni: TAnimation;
    FStyle: TAniIndicatorStyle;
    FFill: TBrush;
    procedure SetStyle(const Value: TAniIndicatorStyle);
  protected
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    procedure SetEnabled(const Value: Boolean); override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure Paint; override;
    function EnabledStored: Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Action;
    property Align;
    property Anchors;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled stored EnabledStored default DefaultEnabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property StyleLookup;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property Style: TAniIndicatorStyle read FStyle write SetStyle default TAniIndicatorStyle.Linear;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TArcDial }

  TArcDial = class(TPresentedControl, IValueRange)
  private
    FValueRange: TValueRange;
    FValueChanged: Boolean;
    FPressing: Boolean;
    FOnChange: TNotifyEvent;
    FSaveValue: Double;
    FTracking: Boolean;
    FShowValue: Boolean;
    FOldValue: Double;
    FDefaultValueRange: TBaseValueRange;
    procedure SetValue(const Value: Double);
    procedure SetShowValue(const Value: Boolean);
    function DefStored: Boolean;
    function GetValueRange: TCustomValueRange;
    procedure SetValueRange(const AValue: TCustomValueRange);
    procedure SetValueRange_(const Value: TValueRange);
    function GetValue: Double;
    function GetFrequency: Double;
    procedure SetFrequency(const Value: Double);
    function FrequencyStored: Boolean;
    function ValueStored: Boolean;
  protected
    function Tick: TControl;
    function Text: TText;
    procedure ApplyStyle; override;
    function CanObserve(const ID: Integer): Boolean; override;
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    procedure Loaded; override;
    function GetActionLinkClass: TActionLinkClass; override;
    procedure ActionChange(Sender: TBasicAction; CheckDefaults: Boolean); override;
    procedure BeforeChangeProc(Sender: TObject);
    procedure ValueRangeChangeProc(Sender: TObject);
    procedure AfterChangedProc(Sender: TObject); virtual;
    function GetDefaultSize: TSizeF; override;
    property DefaultValueRange: TBaseValueRange read FDefaultValueRange;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure AfterConstruction; override;
    property ValueRange: TValueRange read FValueRange write SetValueRange_;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
  published
    { props }
    property Action;
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property ControlType;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property ShowValue: Boolean read FShowValue write SetShowValue default False;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Tracking: Boolean read FTracking write FTracking default True;
    property Value: Double read GetValue write SetValue stored ValueStored nodefault;
    property Frequency: Double read GetFrequency write SetFrequency stored FrequencyStored nodefault;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TExpanderButton }

  TExpanderButton = class(TCustomButton)
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Action;
    property Align;
    property Anchors;
    property AutoTranslate default True;
    property CanFocus default False;
    property CanParentFocus;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DisableFocusEffect;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Font;
    property StyledSettings;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    { triggers }
    property StaysPressed default False;
    property IsPressed default False;

    property Locked default False;
    property Padding;
    property ModalResult default mrNone;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RepeatClick default False;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property Text;
    property TextAlign default TTextAlign.Center;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property WordWrap default False;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

  TExpander = class(TTextControl)
  public const
    /// <summary>Default header height</summary>
    cDefaultHeaderHeight = 25;
  private
    FShowCheck: Boolean;
    FIsChecked: Boolean;
    FOnCheckChange: TNotifyEvent;
    FContentHeight: Integer;
    FHeader: TControl;
    FHeaderHeight: Integer;
    FStyleHeaderHeight: Integer;
    FOnExpandedChanging: TNotifyEvent;
    FOnExpandedChanged: TNotifyEvent;
    FChangingState: Boolean;
    procedure HandleButtonClick(Sender: TObject);
    procedure HandleCheckChange(Sender: TObject);
    procedure SetIsChecked(const Value: Boolean);
    procedure SetIsExpanded(const Value: Boolean);
    procedure SetShowCheck(const Value: Boolean);
    procedure UpdateControlSize(const ChangingState: Boolean);
    procedure ExpandedChanging;
    procedure ExpandedChanged;
  protected
    FIsExpanded: Boolean;
    FContent: TContent;
    FButton: TCustomButton;
    FCheck: TCheckBox;
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    procedure DoRealign; override;
    procedure DoStyleChanged; override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure ReadContentSize(Reader: TReader);
    procedure WriteContentSize(Writer: TWriter);
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure UpdateContentSize;
    procedure DoResized; override;
    function DoSetSize(const ASize: TControlSize; const NewPlatformDefault: Boolean; ANewWidth, ANewHeight: Single;
      var ALastWidth, ALastHeight: Single): Boolean; override;
    function GetDefaultSize: TSizeF; override;
    /// <summary>Called when expanded state is going to change</summary>
    procedure DoExpandedChanging; virtual;
    /// <summary>Called when expanded state just has changed</summary>
    procedure DoExpandedChanged; virtual;
    /// <summary>Called when checked state just has changed</summary>
    procedure DoCheckedChanged; virtual;
    function GetTextSettingsClass: TTextSettingsInfo.TCustomTextSettingsClass; override;
    procedure SetHeaderHeight(const Value: Integer);
    function GetHeaderHeight: Integer;
    /// <summary>Evaluate header height that will be used based on style availability and property value</summary>
    function EffectiveHeaderHeight: Integer;
    /// <summary>Evaluate default header height based on style availability</summary>
    function DefaultHeaderHeight: Integer;
  public
    constructor Create(AOwner: TComponent); override;
    function GetTabList: ITabList; override;
  published
    property Action;
    property Align;
    property Anchors;
    property AutoTranslate default True;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property StyledSettings;
    property TextSettings;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    /// <summary>Allows to customize header height. Default value is -1.
    /// <para>When the value is -1, if the style defines a <c>header</c> element style element height will be taken
    /// for a default. If no such style element is defined, the value of
    /// <see cref="FMX.StdCtrls|TExpander.cDefaultHeaderHeight "/> will be taken in</para></summary>
    property HeaderHeight: Integer read GetHeaderHeight write SetHeaderHeight default -1;
    /// <summary>True if the checkbox is used and is checked (the content is enabled).
    /// <para>See <see cref="FMX.StdCtrls|TExpander.OnCheckChange"/>,
    /// <see cref="FMX.StdCtrls|TExpander.ShowCheck"/></para>
    /// </summary>
    property IsChecked: Boolean read FIsChecked write SetIsChecked default True;
    /// <summary><c>True</c> if expanded
    /// <para>Setting this property to <c>True</c> will expand the control,
    /// <c>False</c> will collapse. Before the state is changed,
    /// <see cref="FMX.StdCtrls|TExpander.OnExpandedChanging"/> event will be called. User can
    /// abort this operation by invoking <see cref="System.SysUtils|Abort"/> in the handler.
    /// <see cref="FMX.StdCtrls|TExpander.OnExpandedChanged"/> event will be invoked after the state change.
    /// </para></summary>
    property IsExpanded: Boolean read FIsExpanded write SetIsExpanded default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    /// <summary>Setting to <c>True</c> will show a check box that enables or disables the content</summary>
    property ShowCheck: Boolean read FShowCheck write SetShowCheck;
    property Size;
    property StyleLookup;
    property Text;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property TabOrder;
    property TabStop;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    /// <summary>Called when checkbox state is changed</summary>
    property OnCheckChange: TNotifyEvent read FOnCheckChange write FOnCheckChange;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    /// <summary>Called when checkbox state is about to change. Can be aborted by EAbort</summary>
    property OnExpandedChanging: TNotifyEvent read FOnExpandedChanging write FOnExpandedChanging;
    /// <summary>Called when checkbox state has changed</summary>
    property OnExpandedChanged: TNotifyEvent read FOnExpandedChanged write FOnExpandedChanged;
  end;

  TImageLoadedEvent = procedure (Sender: TObject; const FileName: string) of object;

  TImageControl = class(TStyledControl)
  private
    FImage: TImage;
    FOnChange: TNotifyEvent;
    FBitmap: TBitmap;
    FEnableOpenDialog: Boolean;
    FOnLoaded: TImageLoadedEvent;
    procedure SetBitmap(const Value: TBitmap);
    procedure UpdateImage;
  protected
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    function CanObserve(const ID: Integer): Boolean; override;
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    procedure Click; override;
    procedure DragOver(const Data: TDragObject; const Point: TPointF; var Operation: TDragOperation); override;
    procedure DragDrop(const Data: TDragObject; const Point: TPointF); override;
    procedure DoBitmapChanged(Sender: TObject); virtual;
    procedure DoLoadFromFile(const FileName: string); virtual;
    function GetDefaultSize: TSizeF; override;
    property Image: TImage read FImage;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure LoadFromFile(const FileName: string);
    function ShowOpenDialog: Boolean;
  published
    property Action;
    property Align;
    property Anchors;
    property Bitmap: TBitmap read FBitmap write SetBitmap;
    property CanFocus default True;
    property CanParentFocus;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DisableFocusEffect;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property EnableOpenDialog: Boolean read FEnableOpenDialog write FEnableOpenDialog default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    property OnLoaded: TImageLoadedEvent read FOnLoaded write FOnLoaded;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TPathLabel }

  TPathLabel = class(TStyledControl)
  private
    FPath: TCustomPath;
    function GetWrapMode: TPathWrapMode;
    procedure SetWrapMode(const Value: TPathWrapMode);
    function GetPathData: TPathData;
    procedure SetPathData(const Value: TPathData);
  protected
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    procedure DefineProperties(Filer: TFiler); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Action;
    property Align;
    property Anchors;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property Data: TPathData read GetPathData write SetPathData;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled;
    property Locked default False;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property Hint;
    property HitTest default False;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property WrapMode: TPathWrapMode read GetWrapMode write SetWrapMode
      default TPathWrapMode.Stretch;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;
    property OnClick;
    property OnDblClick;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

//== INTERFACE END: FMX.StdCtrls
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.ListView.Types (from FMX.ListView.Types.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


{$IF DEFINED(IOS) OR DEFINED(ANDROID)}
{$DEFINE LISTVIEW_TOUCH}
{$ENDIF}

{.$DEFINE PIXEL_ALIGNMENT}
{.$DEFINE DRAW_ITEM_MARGINS}

type
  TListItemAlign = (Leading, Center, Trailing);
  TListItemPurpose = (None, Header, Footer);
  TListItemPurposes = set of TListItemPurpose;

  TListItemPurposeHelper = record helper for TListItemPurpose
    function ToString: string;
  end;

  TListItem = class;
  IListViewAdapter = interface;
  IListViewController = interface;

  TListItemStyleResources = class;

  TListItemDrawState = (Selected, Deleting, EditMode);
  TListItemDrawStates = set of TListItemDrawState;

  TListItemDrawable = class;
  TListItemView = class;
  TListItemCallbackOp = (CreateDrawables, InvalidateOwner, Click);
  TListItemCallback = TProc<TListItemView, TListItemDrawable, TListItemCallbackOp>;

  /// <summary>TListItem view is comprised of TListViewDrawables. These are the actual
  /// view elements that are being painted in the item cells.</summary>
  TListItemDrawable = class(TInterfacedPersistent)
  public type
    TParams = record
      AbsoluteOpacity: Single;
      ItemSelectedAlpha: Single;
      DeletingUnwantedOpacity: Single;
      EditModeTransitionAlpha: Single;
      ParentAbsoluteRect: TRectF;
      Images: TCustomImageList;
    end;
  strict private
    FPlaceOffsetX: TPosition;
  protected type
    TStyleResource = (FontSize, FontFamily, FontStyle, TextColor, SelectedTextColor,
      TextShadowColor, PressedTextColor);
    TStyleResources = set of TStyleResource;
  protected const
    TextResources: set of TStyleResource = [TStyleResource.FontFamily,
      TStyleResource.FontSize, TStyleResource.FontStyle, TStyleResource.TextColor,
      TStyleResource.TextShadowColor, TStyleResource.SelectedTextColor, TStyleResource.PressedTextColor];
  private
    FAlign: TListItemAlign;
    FVertAlign: TListItemAlign;
    FVisible: Boolean;
    FWidth: Single;
    FHeight: Single;
    FOpacity: Single;
    FUpdating: Integer;
    NeedRepaint: Boolean;
    FOnSelect: TNotifyEvent;
    FName: string;
    [Weak] FTagObject: TObject;
    FTagFloat: Single;
    FTagString: string;
    FLocalRect: TRectF;
    FStyleValuesNeedUpdate: TStyleResources;
    FController: IListViewController;
    FCallback: TListItemCallback;

    procedure SetOneDimension(const Index: Integer; const Value: Single);
    procedure SetSize(const Value: TPointF);
    function GetSize: TPointF;
    procedure SetOpacity(const Value: Single);
    procedure SetAlign(const Value: TListItemAlign);
    procedure SetVertAlign(const Value: TListItemAlign);
    procedure SetVisible(const Value: Boolean);
    function GetData: TValue; virtual;
    procedure SetData(const Value: TValue); virtual;
    function GetPlaceOffset: TPosition; inline;
    procedure SetInvalidateCallback(const Callback: TListItemCallback); virtual;
    procedure PlaceOffsetChanged(Sender: TObject);

  protected
    /// <summary>Called when the <see cref='Size'>Size</see> of this drawable changes</summary>
    procedure DoResize; virtual;
    /// <summary>Called when the <see cref='Opacity'>Opacity</see> of this drawable changes</summary>
    procedure DoOpacityChange; virtual;
    /// <summary>Called when <see cref='FMX.ListView.Types.TListItem'>TListItem</see> comprising
    /// this drawable is selected.</summary>
    procedure DoSelect; virtual;
    /// <summary>Called when <see cref='PlaceOffset'>PlaceOffset</see> changes</summary>
    procedure DoPlaceOffsetChanged; virtual;
    /// <summary>Called when <see cref='Align'>Align</see> or <see cref='VertAlign'>VertAlign</see> changes</summary>
    procedure DoAlignChanged; virtual;
    /// <summary>Finds an embedded <see cref='FMX.Controls.TControl'>TControl</see> at given <c>Point</c></summary>
    function ObjectAtPoint(const Point: TPointF): TControl; virtual;

    /// <summary>Handle MouseDown event. Called by
    /// <see cref='FMX.ListView.Types.TListItem.MouseDown'>TListItem.MouseDown</see> </summary>
    function MouseDown(const Button: TMouseButton; const Shift: TShiftState; const MousePos: TPointF): Boolean; virtual;
    /// <summary>Handle MouseMove event. Called by host
    /// <see cref='FMX.ListView.Types.TListItem.MouseMove'>TListItem.MouseMove</see></summary>
    procedure MouseMove(const Shift: TShiftState; const MousePos: TPointF); virtual;
    /// <summary>Handle MouseUp event. Called by
    /// <see cref='FMX.ListView.Types.TListItem.MouseUp'>TListItem.MouseUp</see> </summary>
    procedure MouseUp(const Button: TMouseButton; const Shift: TShiftState; const MousePos: TPointF); virtual;
    /// <summary>Called by <see cref='UpdateValuesFromResources'>UpdateValuesFromResources</see>.
    /// Updates default parameters defined by style in descendants such as font, font syle and colors.</summary>
    procedure DoUpdateValuesFromResources(const Resources: TListItemStyleResources; const Purpose: TListItemPurpose); virtual;
  public
    constructor Create(const AOwner: TListItem); virtual;
    destructor Destroy; override;
    function ToString: string; override;

    /// <summary>Return amount of rendering passes. See TListViewBase.DrawListItems</summary>
    function GetRenderPassCount: Integer; virtual;
    /// <summary>Align and calculate this drawable's local rectangle for given item's DestRect and DrawStates</summary>
    procedure CalculateLocalRect(const DestRect: TRectF; const SceneScale: Single;
      const DrawStates: TListItemDrawStates; const Item: TListItem); virtual;
    /// <summary>Return True if Point is inside local rect</summary>
    function InLocalRect(const Point: TPointF): Boolean;
    /// <summary>Request repaint. When between <c>BeginUpdate</c>/<c>EndUpdate</c> the request will be held back until the
    /// update cycle is finished</summary>
    procedure Invalidate;
    /// <summary>Render this drawable
    ///  <param><c>Canvas</c> destination canvas</param>
    ///  <param><c>DrawItemIndex</c> index within parent <c>TListView</c> of item being rendered</param>
    ///  <param><c>DrawStates</c> which of the item states to render: <c>Selected</c>, <c>Deleting</c>, <c>EditMode</c>;
    ///   see <see cref='TListItemDrawStates'>TListItemDrawStates</see></param>
    ///  <param><c>Resources</c> default style resources to use for rendering;
    ///   <see cref='TListItemStyleResources'>TListItemStyleResources</see></param>
    ///  <param><c>Params</c> extra rendering parameters; see
    ///   <see cref='TListItemDrawable.TParams'>TListItemDrawable.TParams</see></param>
    /// </summary>
    procedure Render(const Canvas: TCanvas; const DrawItemIndex: Integer; const DrawStates: TListItemDrawStates;
      const Resources: TListItemStyleResources; const Params: TParams; const SubPassNo: Integer = 0); virtual; abstract;
    /// <summary>Begin update. During update calling <see cref='InvalidateCallback'>InvalidateCallback</see>
    /// will be held back until <see cref='EndUpdate'>EndUpdate</see></summary>
    procedure BeginUpdate;
    /// <summary>End update. If invalidation was required during the update cycle,
    /// <see cref='InvalidateCallback'>InvalidateCallback</see> will be invoked</summary>
    procedure EndUpdate;
    /// <summary>Initializes or updates default parameters defined by style in descendants such as font, font syle
    /// and colors.</summary>
    procedure UpdateValuesFromResources(const Resources: TListItemStyleResources; const Purpose: TListItemPurpose);
    /// <summary>Set flag that enables UpdateValuesFromResources</summary>
    procedure UpdateValuesFromStyle;
    /// <summary>Local width of list item inside its designated area</summary>
    property Width: Single index 0 read FWidth write SetOneDimension;
    /// <summary>Local height of list item inside its designated area</summary>
    property Height: Single index 1 read FHeight write SetOneDimension;
    /// <summary>Size of this drawable</summary>
    property Size: TPointF read GetSize write SetSize;
    /// <summary>Horizontal alignment of drawable inside its designated area</summary>
    property Align: TListItemAlign read FAlign write SetAlign;
    /// <summary>Vertical alignment of drawable inside its designated area</summary>
    property VertAlign: TListItemAlign read FVertAlign write SetVertAlign;
    /// <summary>Determines whether the current drawable is visible or not</summary>
    property Visible: Boolean read FVisible write SetVisible;
    /// <summary>The offset in logical units regarding aligned location for finer placement control</summary>
    property PlaceOffset: TPosition read GetPlaceOffset;
    /// <summary>Name of this drawable</summary>
    property Name: string read FName write FName;
    /// <summary>Drawing opacity</summary>
    property Opacity: Single read FOpacity write SetOpacity;
    /// <summary>LocalRect of this drawable</summary>
    property LocalRect: TRectF read FLocalRect;
    /// <summary>Invoked when owner TListItem is selected</summary>
    property OnSelect: TNotifyEvent read FOnSelect write FOnSelect;
    // <summary>Polymorphic property access</summary>
    property Data: TValue read GetData write SetData;
    /// <summary>User-defined object reference for this drawable</summary>
    property TagObject: TObject read FTagObject write FTagObject;
    /// <summary>User-defined floating-point number for this drawable</summary>
    property TagFloat: Single read FTagFloat write FTagFloat;
    /// <summary>User-defined string for this drawable</summary>
    property TagString: string read FTagString write FTagString;
    /// <summary>Callback invoked when item is being invalidated
    /// <see cref='FMX.ListView.Types.TListItemCallback'>TListItemCallback</see>
    /// </summary>
    property InvalidateCallback: TListItemCallback write SetInvalidateCallback;
  end;

  /// <summary>Declared for compatibility</summary>
  TListItemObject = class(TListItemDrawable)
  end;

  /// <summary>Represents a text drawable in ListView items</summary>
  TListItemText = class(TListItemDrawable)
  private const
    DefaultFontFamily = 'Helvetica'; // do not localize
    DefaultFontSize = 14;
    ShadowOffset: TPointF = (X: 0; Y: 1);
  private type
    TFontSettings = record
      Family: string;
      Size: Single;
      Style: TFontStyles;
    end;
  strict private
    FFontX: TFont;
    FFontSettings: TFontSettings;
  private
    FTextLayout: TTextLayout;
    FText: string;
    FTextAlign: TTextAlign;
    FTextVertAlign: TTextAlign;
    FWordWrap: Boolean;
    LayoutChanged: Boolean;
    FTextColor: TAlphaColor;
    FSelectedTextColor: TAlphaColor;
    FTrimming: TTextTrimming;
    FTextShadowOffsetX: TPosition;
    FTextShadowColor: TAlphaColor;
    FIsDetailText: Boolean;

    procedure FontChanged(Sender: TObject);
    procedure TextShadowOffsetChanged(Sender: TObject);
    procedure SetText(const Value: string);
    procedure SetTextAlign(const Value: TTextAlign);
    procedure SetTextVertAlign(const Value: TTextAlign);
    procedure SetWordWrap(const Value: Boolean);
    procedure SetTextColor(const Value: TAlphaColor);
    procedure SetTrimming(const Value: TTextTrimming);
    procedure SetSelectedTextColor(const Value: TAlphaColor);
    procedure SetTextShadowColor(const Value: TAlphaColor);
    procedure SetIsDetailText(const Value: Boolean);
    procedure SetData(const AValue: TValue); override;
    function GetData: TValue; override;
    function GetShadowOffset: TPosition; inline;
    function GetFont: TFont;
    function FontSettingsSnapshot: TFontSettings;
  protected
    procedure DoResize; override;
    procedure DoUpdateValuesFromResources(const Resources: TListItemStyleResources; const Purpose: TListItemPurpose); override;
  public
    constructor Create(const AOwner: TListItem); override;
    destructor Destroy; override;

    procedure CalculateLocalRect(const DestRect: TRectF; const SceneScale: Single;
      const DrawStates: TListItemDrawStates; const Item: TListItem); override;
    procedure Render(const Canvas: TCanvas; const DrawItemIndex: Integer; const DrawStates: TListItemDrawStates;
      const Resources: TListItemStyleResources; const Params: TListItemDrawable.TParams; const SubPassNo: Integer = 0); override;
    /// <summary>Font used to drawing text in this drawable</summary>
    property Font: TFont read GetFont;
    /// <summary>Text displayed in this drawable</summary>
    property Text: string read FText write SetText;
    /// <summary>Horizontal text alignment inside local item rectangle</summary>
    property TextAlign: TTextAlign read FTextAlign write SetTextAlign;
    /// <summary>Vertical text alignment inside local item rectangle</summary>
    property TextVertAlign: TTextAlign read FTextVertAlign write SetTextVertAlign;
    /// <summary>Wrap the text it does not fit in the available width</summary>
    property WordWrap: Boolean read FWordWrap write SetWordWrap;
    /// <summary>Text color in neutral state</summary>
    property TextColor: TAlphaColor read FTextColor write SetTextColor;
    /// <summary>Text color in selected state</summary>
    property SelectedTextColor: TAlphaColor read FSelectedTextColor write SetSelectedTextColor;
    /// <summary>Text shadow color. The text shadow will appear behind normal text only when its color is
    /// set to non-zero value (default)</summary>
    property TextShadowColor: TAlphaColor read FTextShadowColor write SetTextShadowColor;
    /// <summary>Text shadow offset. The text shadow will appear behind normal text only when its color is
    /// set to non-zero value (default)</summary>
    property TextShadowOffset: TPosition read GetShadowOffset;
    /// <summary>Text trimming
    /// <see cref='FMX.Types.TTextTrimming'>TTextTrimming</see>
    /// </summary>
    property Trimming: TTextTrimming read FTrimming write SetTrimming;
    /// <summary>Hints regarding the contents of this text object, which affecs visual style</summary>
    property IsDetailText: Boolean read FIsDetailText write SetIsDetailText;
  end;

  /// <summary>An empty drawable</summary>
  TListItemDummy = class(TListItemDrawable)
  public
    procedure Render(const Canvas: TCanvas; const DrawItemIndex: Integer; const DrawStates: TListItemDrawStates;
      const Resources: TListItemStyleResources; const Params: TListItemDrawable.TParams;
      const SubPassNo: Integer = 0); override;
  end;

  /// <summary>Image scaling modes for TListItemImage
  /// <see cref='FMX.ListView.Types.TListItemImage.ScalingMode'>TListItemImage.ScalingMode</see>
  /// <param><c>StretchWithAspect</c></param> stretch while preserving aspect ratio
  /// <param><c>Original</c></param> keep original size and proportion
  /// <param><c>Stretch</c></param> stertch to fill available area disregarding proportions
  /// </summary>
  TImageScalingMode = (StretchWithAspect, Original, Stretch);

  /// <summary>A TListItemDrawable representing an image</summary>
  TListItemImage = class(TListItemDrawable)
  public type
    /// <summary>Image source:
    /// <para><b>None</b> no image source</para>
    /// <para><b>Bitmap</b> bitmap or bitmap reference</para>
    /// <para><b>ImageList</b> bitmap is specified by an index in an ImageList</para>
    /// </summary>
    TImageSource = (None, Bitmap, ImageList);
  private
    FStaticBitmap: TBitmap;
    [Weak]FReferBitmap: TBitmap;
    FSrcRect: TRectF;
    FOwnsBitmap: Boolean;
    FImageScalingMode: TImageScalingMode;
    FImageIndex: TImageIndex;
    FImageSource: TImageSource;
    function GetBitmap: TBitmap;
    procedure SetBitmap(const Value: TBitmap);
    procedure SetOwnsBitmap(const Value: Boolean);
    procedure SetSrcRect(const Value: TRectF);
    procedure SetImageScalingMode(const Value: TImageScalingMode);
    procedure SetImageIndex(const Value: TImageIndex);
    function GetImageSource: TImageSource; inline;
    procedure SetData(const Value: TValue); override;
  public
    constructor Create(const AOwner: TListItem); override;
    destructor Destroy; override;
    procedure CalculateLocalRect(const DestRect: TRectF; const SceneScale: Single;
      const DrawStates: TListItemDrawStates; const Item: TListItem); override;
    procedure Render(const Canvas: TCanvas; const DrawItemIndex: Integer; const DrawStates: TListItemDrawStates;
      const Resources: TListItemStyleResources; const Params: TListItemDrawable.TParams;
      const SubPassNo: Integer = 0); override;
    /// <summary>Bitmap, used if <b>ImageSource</b> equals <b>TImageSource.Bitmap</b></summary>
    property Bitmap: TBitmap read GetBitmap write SetBitmap;
    /// <summary>Determines whether this list owns and maintains the bitmap, or whether it is a reference only.
    /// It is must faster and memory efficient to have multiple references to a single bitmap rather than multiple
    /// copies of the same bitmap copied across the items</summary>
    property OwnsBitmap: Boolean read FOwnsBitmap write SetOwnsBitmap;
    /// <summary>Fit InputRect part of Bitmap into DestinationRect according to current ScalingMode
    /// <para><b>Bitmap</b> TBitmap being fit</para>
    /// <para><b>InputRect</b> source rectangle</para>
    /// <para><b>DestinationRect</b> destination rectangle where the bitmap is to be placed</para>
    /// </summary>
    procedure FitInto(const Bitmap: TBitmap; var InputRect, DestinationRect: TRectF);
    /// <summary>Source rectangle in ImageSource</summary>
    property SrcRect: TRectF read FSrcRect write SetSrcRect;
    /// <summary>Scaling mode used for fitting the bitmap into destination rectangle</summary>
    property ScalingMode: TImageScalingMode read FImageScalingMode write SetImageScalingMode
      default TImageScalingMode.StretchWithAspect;
    /// <summary>Indicates whether the images are obtained from TImageList or directly by using Bitmap property.</summary>
    property ImageSource: TImageSource read GetImageSource;
    ///<summary> Zero based index of an image. The default is <c>-1</c>.
    ///<para> See also <b>FMX.ActnList.IGlyph</b></para></summary>
    ///<remarks> If non-existing index is specified, an image is not drawn and no exception is raised</remarks>
    property ImageIndex: TImageIndex read FImageIndex write SetImageIndex default -1;
  end;

  TListItemEmbeddedControl = class;
  /// <summary>IScene implementation for TListItemEmbeddedControl</summary>
  TListItemControlScene = class(TFmxObject, IStyleBookOwner, IScene)
  strict private
    FCanvas: TCanvas;
    [Weak] FContainer: TControl;
    [Weak] FOwnerItem: TListItem;
    FDrawing: Boolean;
    FDisableUpdating: Integer;
  private
    FLayoutSize: TPoint;
    function GetRealScene: IScene;
  protected
    // TFmxObject
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    // IStyleBookOwner
    function GetStyleBook: TStyleBook;
    procedure SetStyleBook(const Value: TStyleBook);
    // IScene
    function GetCanvas: TCanvas;
    function GetSceneScale: Single;
    function GetObject: TFmxObject;
    procedure AddUpdateRect(const R: TRectF);
    function GetUpdateRectsCount: Integer;
    function GetUpdateRect(const Index: Integer): TRectF;
    function LocalToScreen(const P: TPointF): TPointF;
    function ScreenToLocal(const P: TPointF): TPointF;
    procedure ChangeScrollingState(const AControl: TControl; const Active: Boolean);
    procedure DisableUpdating;
    procedure EnableUpdating;
    /// <summary>Set item that contains this scene</summary>
    procedure SetOwnerItem(const Item: TListItem);
    /// <summary>Set container control</summary>
    procedure SetContainer(const Container: TControl);
    /// <summary>Get IScene of the parent control, i.e. TListView</summary>
    property RealScene: IScene read GetRealScene;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    /// <summary>Repaint scene on canvas Canvas</summary>
    procedure RepaintScene(const Canvas: TCanvas);
    /// <summary>Container control</summary>
    property Container: TControl read FContainer;
  end;

  /// <summary>A dummy TControl that contains a TListItemEmbeddedControl</summary>
  TListItemControlContainer = class(TControl)
  private
    [weak]FItemOwner: TListItemEmbeddedControl;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  end;

  /// <summary>Base class for TListItem embedded controls</summary>
  TListItemEmbeddedControl = class(TListItemDrawable)
  private
    FScene: TListItemControlScene;
    FContainer: TListItemControlContainer;
  protected
    /// <summary>Return TControl located at given Point</summary>
    function ObjectAtPoint(const Point: TPointF): TControl; override;
  public
    constructor Create(const AOwner: TListItem); override;
    destructor Destroy; override;
    procedure Render(const Canvas: TCanvas; const DrawItemIndex: Integer; const DrawStates: TListItemDrawStates;
      const Resources: TListItemStyleResources; const Params: TListItemDrawable.TParams;
      const SubPassNo: Integer = 0); override;
    /// <summary>TListItemControlContainer of this embedded control</summary>
    property Container: TListItemControlContainer read FContainer;
  end;

  /// <summary>Simple embedded control base class</summary>
  TListItemSimpleControl = class(TListItemDrawable)
  private const
    DisabledOpacity = 0.6;
  private
    FEnabled: Boolean;
    FPressed: Boolean;
    FMouseOver: Boolean;
    FTouchExpand: Single;
    procedure SetEnabled(const Value: Boolean);
  protected
    /// <summary>Shall intercept clicks</summary>
    function IsClickOpaque: Boolean; virtual;
    function MouseDown(const Button: TMouseButton; const Shift: TShiftState; const MousePos: TPointF): Boolean;
      override;
    procedure MouseMove(const Shift: TShiftState; const MousePos: TPointF); override;
    procedure MouseUp(const Button: TMouseButton; const Shift: TShiftState; const MousePos: TPointF); override;
    /// <summary>Handle click</summary>
    procedure DoClick; virtual;
    /// <summary>Handle change of Enabled</summary>
    procedure DoEnabledChange; virtual;
  public
    constructor Create(const AOwner: TListItem); override;
    /// <summary>Test if point Pos belongs to local rectangle of this control</summary>
    function PointInLocalRect(const Pos: TPointF): Boolean;
    /// <summary>This method is called when click event is sent to the control to handle any actions associated
    /// with this item</summary>
    procedure Click;
    /// <summary>Control state: Enabled</summary>
    property Enabled: Boolean read FEnabled write SetEnabled;
    /// <summary>Control state: Pressed</summary>
    property Pressed: Boolean read FPressed;
    /// <summary>Control state: MouseOver</summary>
    property MouseOver: Boolean read FMouseOver;
    /// <summary>Additional area (in logical units) around the control that is sensitive to touch</summary>
    property TouchExpand: Single read FTouchExpand write FTouchExpand;
  end;

  /// <summary>Accessory type for <b>TListItemAccessory</b>
  ///  <para><c>More</c> more</para>
  ///  <para><c>Checkmark</c> checkmark</para>
  ///  <para><c>Detail</c> detail disclosure</para>
  /// </summary>
  TAccessoryType = (More, Checkmark, Detail);

  /// <summary>List item accessory, a glyph typically displayed at the right edge of the list item</summary>
  TListItemAccessory = class(TListItemDrawable)
  private
    FAccessoryType: TAccessoryType;
  protected
    /// <summary>Set accessory type: <c>More</c>, <c>Checkmark</c> or <c>Detail</c></summary>
    procedure SetAccessoryType(Value: TAccessoryType);
  public
    constructor Create(const AOwner: TListItem); override;

    procedure CalculateLocalRect(const DestRect: TRectF; const SceneScale: Single;
      const DrawStates: TListItemDrawStates; const Item: TListItem); override;
    procedure Render(const Canvas: TCanvas; const DrawItemIndex: Integer; const DrawStates: TListItemDrawStates;
      const Resources: TListItemStyleResources; const Params: TListItemDrawable.TParams;
      const SubPassNo: Integer = 0); override;

    /// <summary>Accessory type, <see cref='FMX.ListView.Types.TAccessoryType'>TAccessoryType</see></summary>
    property AccessoryType: TAccessoryType read FAccessoryType write SetAccessoryType;
  end;

  /// <summary>Glyph type for <b>TListItemGlyphButton</b>
  ///  <para><b>Add</b> plus button</para>
  ///  <para><b>Delete</b> delete button</para>
  ///  <para><b>Checkbox</b> selection checkbox</para>
  /// </summary>
  TGlyphButtonType = (Add, Delete, Checkbox);

  /// <summary>Glyph button is an additional control usually used in Edit mode. It can be an Add/Plus sign,
  /// a Delete button or a Checkbox</summary>
  TListItemGlyphButton = class(TListItemSimpleControl)
  private const
    CheckedAnimationFrameRate = 60;
    CheckedAnimationDuration = 0.15; // in seconds
  private
    FButtonType: TGlyphButtonType;
    FClickOnSelect: Boolean;
    FChecked: Boolean;
    FTransitionEnabled: Boolean;
    FTransitionAlpha: Single;
    FTransitionTimer: TTimer;
    FTransitionStartTicks: Double;
    FTimerService: IFMXTimerService;
    procedure SetButtonType(const Value: TGlyphButtonType);
    procedure SetChecked(const Value: Boolean);
    procedure InitCheckedTransition;
    procedure ResetCheckedTransition;
    procedure TransitionTimerNotify(Sender: TObject);
  protected
    procedure DoSelect; override;
    procedure DoClick; override;
    function MouseDown(const Button: TMouseButton; const Shift: TShiftState; const MousePos: TPointF): Boolean;
      override;
    procedure SetData(const AValue: TValue); override;
  public
    constructor Create(const AOwner: TListItem); override;
    destructor Destroy; override;
    procedure CalculateLocalRect(const DestRect: TRectF; const SceneScale: Single;
      const DrawStates: TListItemDrawStates; const Item: TListItem); override;
    procedure Render(const Canvas: TCanvas; const DrawItemIndex: Integer; const DrawStates: TListItemDrawStates;
      const Resources: TListItemStyleResources; const Params: TListItemDrawable.TParams;
      const SubPassNo: Integer = 0); override;
    /// <summary>Button type, <see cref='FMX.ListView.Types.TGlyphButtonType'>TGlyphButtonType</see></summary>
    property ButtonType: TGlyphButtonType read FButtonType write SetButtonType;
    /// <summary>If set to True, this button will receive click events from entire list by using of selection</summary>
    property ClickOnSelect: Boolean read FClickOnSelect write FClickOnSelect;
    /// <summary>Determines whether checkbox is checked, has no effect for other button types</summary>
    property Checked: Boolean read FChecked write SetChecked;
  end;

  /// <summary>Type of TListItemTextButton
  ///  <para><b>Normal</b> a regular button</para>
  ///  <para><b>Delete</b> a delete button</para>
  /// </summary>
  TTextButtonType = (Normal, Delete);

  /// <summary>A button with text that can be clicked inside of a TListItem</summary>
  TListItemTextButton = class(TListItemSimpleControl)
  private
    FTextDrawable: TListItemText;
    FButtonType: TTextButtonType;
    FTintColor: TAlphaColor;
    FPressedTextColor: TAlphaColor;
    FTextColor: TAlphaColor;

    // getters routing to FTextDrawable
    function GetFont: TFont;
    function GetText: string;
    procedure SetText(const Value: string);
    procedure SetTextAlign(const Value: TTextAlign);
    function GetTextAlign: TTextAlign;
    procedure SetTextVertAlign(const Value: TTextAlign);
    function GetTextVertAlign: TTextAlign;
    procedure SetWordWrap(const Value: Boolean);
    function GetWordWrap: Boolean;
    procedure SetTextColor(const Value: TAlphaColor);
    function GetTextColor: TAlphaColor;
    procedure SetTrimming(const Value: TTextTrimming);
    function GetTrimming: TTextTrimming;
    procedure SetTextShadowColor(const Value: TAlphaColor);
    function GetTextShadowColor: TAlphaColor;

    // button-specific text properties
    procedure SetPressedTextColor(const Value: TAlphaColor);
    function GetTextShadowOffset: TPosition; inline;
    procedure SetButtonType(const Value: TTextButtonType);
    procedure SetTintColor(const Value: TAlphaColor);
    procedure SetInvalidateCallback(const Callback: TListItemCallback); override;
  protected
    function IsClickOpaque: Boolean; override;
    procedure DoResize; override;
    procedure DoOpacityChange; override;
    procedure DoPlaceOffsetChanged; override;
    procedure DoAlignChanged; override;
    procedure SetData(const AValue: TValue); override;
  public
    constructor Create(const AOwner: TListItem); override;
    destructor Destroy; override;

    procedure DoUpdateValuesFromResources(const Resources: TListItemStyleResources;
      const Purpose: TListItemPurpose); override;
    function GetRenderPassCount: Integer; override;
    procedure CalculateLocalRect(const DestRect: TRectF; const SceneScale: Single;
      const DrawStates: TListItemDrawStates; const Item: TListItem); override;
    procedure Render(const Canvas: TCanvas; const DrawItemIndex: Integer; const DrawStates: TListItemDrawStates;
      const Resources: TListItemStyleResources; const Params: TListItemDrawable.TParams;
      const SubPassNo: Integer = 0); override;

    /// <summary>Button type, <see cref='FMX.ListView.Types.TTextButtonType'>TTextButtonType</see></summary>
    property ButtonType: TTextButtonType read FButtonType write SetButtonType;
    /// <summary>Button tint color</summary>
    property TintColor: TAlphaColor read FTintColor write SetTintColor;
    /// <summary>Font used to draw button text</summary>
    property Font: TFont read GetFont;
    /// <summary>Button text</summary>
    property Text: string read GetText write SetText;
    /// <summary>Horizontal alignment of text within the button area</summary>
    property TextAlign: TTextAlign read GetTextAlign write SetTextAlign;
    /// <summary>Vertical alignment of text within the button area</summary>
    property TextVertAlign: TTextAlign read GetTextVertAlign write SetTextVertAlign;
    /// <summary>If true, the text that does not fit in button width will be wrapped</summary>
    property WordWrap: Boolean read GetWordWrap write SetWordWrap;
    /// <summary>Text color in neutral state</summary>
    property TextColor: TAlphaColor read GetTextColor write SetTextColor;
    /// <summary>Text color in pressed state</summary>
    property PressedTextColor: TAlphaColor read FPressedTextColor write SetPressedTextColor;
    /// <summary>Text shadow color</summary>
    property TextShadowColor: TAlphaColor read GetTextShadowColor write SetTextShadowColor;
    /// <summary>Text shadow offset</summary>
    property TextShadowOffset: TPosition read GetTextShadowOffset;
    /// <summary>Text trimming
    /// <see cref='FMX.Types.TTextTrimming'>TTextTrimming</see>
    /// </summary>
    property Trimming: TTextTrimming read GetTrimming write SetTrimming;
  end;

  /// <summary>TListItemView is a collection of drawables that comprise the view of a TListItem</summary>
  TListItemView = class
  private type
    TViewList = TObjectList<TListItemDrawable>;
  private
    FCallback: TListItemCallback;
    FViewList: TListItemView.TViewList;
    FInitialized: Boolean;

    function GetCount: Integer;
    function GetObject(const Index: Integer): TListItemDrawable;
    function GetViewList: TViewList; inline;
  protected
    procedure Include(const AItem: TListItemDrawable);
    procedure Exclude(const AItem: TListItemDrawable);
    function GetInitialized: Boolean;
    procedure SetInitialized(const Value: Boolean);
  public
    constructor Create(const AOwner: TListItem);
    destructor Destroy; override;
    /// <summary>Add a drawable to view</summary>
    function Add(const AItem: TListItemDrawable): Integer;
    /// <summary>Insert a drawable at a position indicated by Index</summary>
    procedure Insert(const Index: Integer; const Value: TListItemDrawable);
    /// <summary>Clear the view</summary>
    procedure Clear; virtual;
    /// <summary>Delete drawable at index Index</summary>
    procedure Delete(Index: Integer);
    /// <summary>Find <see cref='FMX.ListView.Types.TListItemDrawable'>TListItemDrawable</see>
    /// specified by name AName</summary>
    function FindDrawable(const AName: string): TListItemDrawable;
    /// <summary>Find TListItemDrawable specified by name AName</summary>
    function FindObject(const AName: string): TListItemDrawable; deprecated 'Use FindDrawable';

                                                                                                                          
    /// <summary>Find TListItemDrawable specified by name AName and throw an error if not found</summary>
    function DrawableByName(const AName: string): TListItemDrawable;
    /// <summary>Find TListItemDrawable specified by name AName and throw an error if not found</summary>
    function ObjectByName(const AName: string): TListItemDrawable; deprecated 'Use DrawableByName';
    /// <summary>Number of drawables in this view</summary>
    property Count: Integer read GetCount;
    /// <summary>TListItemDrawable by index</summary>
    property Drawables[const Index: Integer]: TListItemDrawable read GetObject; default;
    /// <summary>Get TViewList that contains the drawables</summary>
    property ViewList: TViewList read GetViewList;
    /// <summary>Used internally to notify owner about changes</summary>
    property Callback: TListItemCallback write FCallback;
    /// <summary>Used internally</summary>
    property Initialized: Boolean read GetInitialized write SetInitialized;
  end;

  /// <summary>Compatibility class for TListItemView</summary>
  TListItemObjects = class(TListItemView)
  end;

  /// <summary>TListItem is an element that comprises TListView. Each individual item contains a View,
  /// which in turn is comprised of instances of TListItemDrawable</summary>
  TListItem = class
  public type
    TListItemViewType = class of TListItemView;
    TListItemNotifyEvent = procedure(const Item: TListItem) of object;
  strict private
    FHeaderRef: Integer;
    FAdapter: IListViewAdapter;
    FController: IListViewController;
  private
    FIndex: Integer;
    FHeight: Integer;
    FPurpose: TListItemPurpose;
    FUpdating: Integer;
    FNeedRepaint: Boolean;
    FView: TListItemView;
    [Weak] FTagObject: TObject;
    FTag: NativeInt;
    FTagFloat: Single;
    FTagString: string;
    function GetCount: Integer;
    procedure SetHeight(const Value: Integer);
    function GetController: IListViewController;
  protected
    /// <summary>Invoked when item height changes and heights of all items need to be recounted</summary>
    procedure InvalidateHeights; virtual;
    /// <summary>Setter for Purpose property</summary>
    procedure SetPurpose(const AValue: TListItemPurpose); virtual;
    /// <summary>Require repaint, notify the controller that the item is invalid</summary>
    procedure Repaint; virtual;
    /// <summary>Return class of TListItemView</summary>
    function ListItemObjectsClass: TListItemViewType; virtual;
    /// <summary>Getter for Index property</summary>
    function GetIndex: Integer; virtual;
    /// <summary>Setter for Index property</summary>
    procedure SetIndex(const Value: Integer); virtual;
  public
    constructor Create(const AAdapter: IListViewAdapter; const AController: IListViewController = nil);
    destructor Destroy; override;
    function ToString: string; override;
    /// <summary>Invalidate item, request repainting</summary>
    procedure Invalidate;
    /// <summary>Begin update. Invalidation request will not cause immediate action during update.</summary>
    procedure BeginUpdate;
    /// <summary>End update</summary>
    procedure EndUpdate;
    /// <summary>Called when the view drawables need to be created</summary>
    procedure CreateObjects; virtual;
    /// <summary>Called when the item is about to be painted</summary>
    procedure WillBePainted; virtual;
    /// <summary>Locate a control at a point, used with embedded controls</summary>
    function ObjectAtPoint(const Point: TPointF): TControl;
    /// <summary>Handle MouseDown event</summary>
    function MouseDown(const Button: TMouseButton; const Shift: TShiftState; const MousePos: TPointF): Boolean;
    /// <summary>Handle MouseMove event</summary>
    procedure MouseMove(const Shift: TShiftState; const MousePos: TPointF);
    /// <summary>Handle MouseUp event</summary>
    procedure MouseUp(const Button: TMouseButton; const Shift: TShiftState; const MousePos: TPointF);
    /// <summary>Handle selection</summary>
    procedure MouseSelect;
    /// <summary>True if there are items inside that react as clicked when the item is selected</summary>
    function HasClickOnSelectItems: Boolean;
    /// <summary>Adapter that observes this item</summary>
    property Adapter: IListViewAdapter read FAdapter;
    /// <summary>Number of drawables in the View, shorthand for View.Count</summary>
    property Count: Integer read GetCount;
    /// <summary>The view, drawables that comprise the visual of this item</summary>
    property View: TListItemView read FView;
    /// <summary>Height of this item</summary>
    property Height: Integer read FHeight write SetHeight;
    /// <summary>Reference to IListViewController</summary>
    property Controller: IListViewController read GetController;
    /// <summary>Which purpose item serves for: normal item (none), header or footer.
    /// <see cref='FMX.ListView.Types.TListItemPurpose'>TListItemPurpose</see></summary>
    property Purpose: TListItemPurpose read FPurpose write SetPurpose;
    /// <summary>Reference to header of the group this item belongs to, for grouped views</summary>
    property HeaderRef: Integer read FHeaderRef write FHeaderRef;
    /// <summary>Index of this item in TListView.Adapter</summary>
    property Index: Integer read GetIndex write SetIndex;
    /// <summary>User-defined integer tag for this item</summary>
    property Tag: NativeInt read FTag write FTag;
    /// <summary>User-defined object reference for this item</summary>
    property TagObject: TObject read FTagObject write FTagObject;
    /// <summary>User-defined floating-point number for this drawable</summary>
    property TagFloat: Single read FTagFloat write FTagFloat;
    /// <summary>User-defined string tag for this item</summary>
    property TagString: string read FTagString write FTagString;
  end;

  /// <summary>A container used for passing various style-defined properties used in <c>TListView</c></summary>
  TListItemStyleResources = class
  private
    FOwnsObjects: Boolean;
  public type
    /// <summary>References to <c>TStyleObject</c>s used for rendering of <c>TListItemAccessory</c></summary>
    TAccessoryStyleObject = record
      /// <summary>Accessory <c>TStyleObject</c> in neutral state</summary>
      [Weak] Normal: TStyleObject;
      /// <summary>Accessory <c>TStyleObject</c> in selected state</summary>
      [Weak] Selected: TStyleObject;
    end;

    /// <summary>Style objects used for button rendering</summary>
    TButtonStyleObject = record
      /// <summary>Button <c>TStyleObject</c> in neutral state</summary>
      [Weak] Normal: TStyleObject;
      /// <summary>Button <c>TStyleObject</c> in pressed state</summary>
      [Weak] Pressed: TStyleObject;
    end;
  public
    /// <summary>Style references used for Accessory rendering</summary>
    AccessoryImages: array [TAccessoryType] of TAccessoryStyleObject;
    /// <summary>Font used in header items</summary>
    HeaderTextFont: TFont;
    /// <summary>Color of header text</summary>
    HeaderTextColor: TAlphaColor;
    /// <summary>Color of header text shadow</summary>
    HeaderTextShadowColor: TAlphaColor;
    /// <summary>Default font for text drawables</summary>
    DefaultTextFont: TFont;
    /// <summary>Default color for text drawables</summary>
    DefaultTextColor: TAlphaColor;
    /// <summary>Default font for detail text</summary>
    DetailTextFont: TFont;
    /// <summary>Default color for detail text</summary>
    DetailTextColor: TAlphaColor;
    /// <summary>Default color for text in selected state</summary>
    DefaultTextSelectedColor: TAlphaColor;
    /// <summary>Style objects for Add Item <c>TListItemGlyphButton</c></summary>
    ButtonAddItemStyleImage: TButtonStyleObject;
    /// <summary>Style objects for Delete Item <c>TListItemGlyphButton</c></summary>
    ButtonDeleteItemStyleImage: TButtonStyleObject;
    /// <summary>Background image for regular <c>TListItemTextButton</c></summary>
    ButtonNormalStyleImage: TButtonStyleObject;
    /// <summary>Background image for delete-themed <c>TListItemTextButton</c></summary>
    ButtonDeleteStyleImage: TButtonStyleObject;
    /// <summary>Style objects for Checkbox <c>TListItemGlyphButton</c></summary>
    ButtonCheckboxStyleImage: TButtonStyleObject;
    /// <summary>Font for <c>TListItemTextButton</c></summary>
    ButtonTextFont: TFont;
    /// <summary>Text color for neutral state <c>TListItemTextButton</c></summary>
    ButtonTextColor: TAlphaColor;
    /// <summary>Text color for pressed state <c>TListItemTextButton</c></summary>
    ButtonTextPressedColor: TAlphaColor;
    /// <summary>Font for delete-themed <c>TListItemTextButton</c></summary>
    DeleteButtonTextFont: TFont;
    /// <summary>Text color for neutral state delete-themed <c>TListItemTextButton</c></summary>
    DeleteButtonTextColor: TAlphaColor;
    /// <summary>Text color for pressed state delete-themed <c>TListItemTextButton</c></summary>
    DeleteButtonTextPressedColor: TAlphaColor;
    /// <summary>Glow color that appears at the top or the bottom of screen when scrolling
    /// is being stretched out</summary>
    ScrollingStretchGlowColor: TAlphaColor;
    /// <summary>Indicator color for drawing Pull Refresh indicator</summary>
    PullRefreshIndicatorColor: TAlphaColor;
    /// <summary>Stroke color for drawing Pull Refresh indicator</summary>
    PullRefreshStrokeColor: TAlphaColor;
    constructor Create; overload;
    constructor Create(const Source: TListItemStyleResources); overload;
    destructor Destroy; override;
  end;

  /// <summary>Interface providing access to style resources. Implemented by <c>TListViewBase</c></summary>
  IListItemStyleResources = interface
    ['{0328C6F1-432C-4F8B-994B-7AB2543CD172}']
    /// <summary>Getter for StyleResources property</summary>
    function GetStyleResources: TListItemStyleResources;
    /// <summary><c>TListView</c> style resources</summary>
    property StyleResources: TListItemStyleResources read GetStyleResources;
    /// <summary><c>True</c> if style resources should be reloaded</summary>
    function StyleResourcesNeedUpdate: Boolean;
  end;

  /// <summary>Interface providing loose coupling between <c>TListView</c> and <c>TListItem</c>. Implemented by
  /// <c>TListViewBase</c></summary>
  IListViewController = interface
    ['{3855EF72-3B32-41BE-9068-7B109B2DD8E5}']
    function GetEditModeTransitionAlpha: Single;
    function GetDeleteModeTransitionAlpha: Single;
    function GetImages: TCustomImageList;
    /// <summary><c>True</c> if delete mode is enabled</summary>
    function IsDeleteModeAllowed: Boolean;
    /// <summary>Left offset of item rectangle in edit mode</summary>
    function GetItemEditOffset(const Item: TListItem): Single;
    /// <summary>Right cutoff of item rectangle in delete mode</summary>
    function GetItemDeleteCutoff(const Item: TListItem): Single;
    /// <summary>Item selection alpha</summary>
    function GetItemSelectionAlpha(const Item: TListItem): Single;
    /// <summary>Client area margins</summary>
    function GetClientMargins: TRectF;
    /// <summary>IScene of the <c>TListView</c> control</summary>
    function GetScene: IScene;
    /// <summary>Request <c>TListView</c> to initialize item indices; see "FMX.ListView.Appearances.TListViewItem"</summary>
    procedure RequestReindexing(const Item: TListItem);
    /// <summary>Notify <c>TListView</c> that item size has changed; see "TListViewItem.InvalidateHeights"</summary>
    procedure ItemResized(const Item: TListItem);
    /// <summary>Notify <c>TListView</c> that item requires repainting</summary>
    procedure ItemInvalidated(const Item: TListItem);
    /// <summary>Notify <c>TListView</c> that a control inside of an item has been clicked</summary>
    procedure ControlClicked(const Item: TListItem; const Control: TListItemDrawable);
    /// <summary>Notify <c>TListView</c> that a control inside of an item has been clicked</summary>
    procedure CheckStateChanged(const Item: TListItem; const Control: TListItemDrawable);
    /// <summary>Item alpha during edit mode transition</summary>
    property EditModeTransitionAlpha: Single read GetEditModeTransitionAlpha;
    /// <summary>Item alpha during delete transition</summary>
    property DeleteModeTransitionAlpha: Single read GetDeleteModeTransitionAlpha;
    ///<summary>TImageList used when ImageSource = ImageList; can be <c>nil</c></summary>
    property Images: TCustomImageList read GetImages;
  end;

  /// <summary>Presentation of <c>TPresentedListView</c>. The control passes messages to the
  /// presentation layer by the means of this interface.</summary>
  IListViewPresentation = interface
    ['{85C07617-2BB7-44DC-BBCB-2E3FE422B006}']
    /// <summary>Called when ancestor's visible property is changed</summary>
    procedure AncestorVisibleChanged(const Visible: Boolean);
    /// <summary>Called when Parent is changed</summary>
    procedure ParentChanged;
    /// <summary>Called when position in parent list is changed</summary>
    procedure OrderChanged;
    /// <summary>Called when control size has changed</summary>
    procedure SizeChanged;
    /// <summary>Called when edit mode has changed</summary>
    procedure EditModeChanged;
    /// <summary>Called when visibility status has changed</summary>
    procedure StatusChanged;
    /// <summary>Called when item presentation requires update</summary>
    procedure ItemsUpdated;
    /// <summary>Item has been invalidated, presentation should reinitialize its view</summary>
    procedure ItemInvalidated(const Item: TListItem);
    /// <summary>Item has been selected by the control, presentation should update its selection</summary>
    procedure SetItemSelected(const ItemIndex: Integer; const Value: Boolean);
    /// <summary>Selected item index has been changed by the control, presentation should update selection</summary>
    procedure SetItemIndex(const ItemIndex: Integer);
    /// <summary>Force stop pull refresh</summary>
    procedure StopPullRefresh;
  end;

  /// <summary>Base interface from presented control to presentation</summary>
  IListViewCustomPresentationParent = interface
    ['{EBBE5FAA-F2B3-4606-AE32-8027DB97EC92}']
    /// <summary>Get root object, normally Root.GetObject</summary>
    function GetRootObject: TObject;
    /// <summary>Get content frame of the presented control</summary>
    function GetContentFrame: TRect;
    /// <summary>Get opacity of the presented control</summary>
    function GetControlOpacity: Single;
  end;

  /// <summary>Enumeration of internally used boolean flags</summary>
  TListViewModeFlag = (Edit, Enabled, Visible, Deletion, PullRefresh, Buttons, Search, SearchOnTop, PullRefreshWait,
    SwipeDelete);
  /// <summary>Set of boolean flags used internally</summary>
  TListViewModeFlags = set of TListViewModeFlag;

  /// <summary>View options specific to native iOS presentation</summary>
  TListViewNativeOption = (Grouped, Indexed, Styled);
  /// <summary>View options specific to native iOS presentation.
  /// <see cref='IListViewPresentationParent'>IListViewPresentationParent</see></summary>
  TListViewNativeOptions = set of TListViewNativeOption;

  /// <summary>Interface from presented control to presentation</summary>
  IListViewPresentationParent = interface(IListViewCustomPresentationParent)
    ['{F5657E45-0955-4A9F-9FE6-6C5E019846E4}']
    /// <summary>Obtains <c>IListViewAdapter</c></summary>
    function GetAdapter: IListViewAdapter;
    /// <summary>Obtains client rectangle for item with index <c>ItemIndex</c></summary>
    function GetItemClientRect(const ItemIndex: Integer): TRectF;
    /// <summary>Obtains item count</summary>
    function GetItemCount: Integer;
    /// <summary>Obtains height of item <c>ItemIndex</c></summary>
    function GetItemHeight(const ItemIndex: Integer): Integer;
    /// <summary>Guess item height before exact values can be calculated</summary>
    function GetEstimatedItemHeight: Single;
    /// <summary>Guess header height before exact values can be calculated</summary>
    function GetEstimatedHeaderHeight: Single;
    /// <summary>Guess footer height before exact values can be calculated</summary>
    function GetEstimatedFooterHeight: Single;
    /// <summary>Get main text of item <c>ItemIndex</c></summary>
    function GetItemText(const ItemIndex: Integer): string;
    /// <summary>Get index title for item <c>ItemIndex</c></summary>
    function GetItemIndexTitle(const ItemIndex: Integer): string;
    /// <summary>Query if item <c>ItemIndex</c> is selectable</summary>
    function CanSelectItem(const ItemIndex: Integer): Boolean;
    /// <summary>Notify control when item <c>ItemIndex</c> was selected</summary>
    procedure DidSelectItem(const ItemIndex: Integer);
    /// <summary>Query if item <c>ItemIndex</c> can be unselected</summary>
    function CanUnselectItem(const ItemIndex: Integer): Boolean;
    /// <summary>Notify control that item <c>ItemIndex</c> was unselected</summary>
    procedure DidUnselectItem(const ItemIndex: Integer);
    /// <summary>Notify control that an item button was clicked</summary>
    procedure ItemButtonClicked(const ItemIndex: Integer);
    /// <summary>Obtain presentation-specific boolean flags</summary>
    function GetFlags: TListViewModeFlags;
    /// <summary>Obtain native presentation-specific boolean flags</summary>
    function GetOptions: TListViewNativeOptions;
    /// <summary>Commit deletion of item <c>ItemIndex</c></summary>
    function DeleteItem(const ItemIndex: Integer): Boolean;
    /// <summary>Invoke pull refresh</summary>
    procedure InvokePullRefresh;
    /// <summary>Set search filter string</summary>
    procedure SetSearchFilter(const Filter: string);
    /// <summary>Pass scroll view position to the control</summary>
    procedure SetScrollViewPos(const Value: Single);
    /// <summary>Require rebuild of the list</summary>
    procedure RebuildList;
    /// <summary>Set boolean flag that indicates that native view is being created. It is used
    /// as a guard condition to prevent TListView logic from interfering with the presentation
    /// while a view is being initialized</summary>
    procedure SetCreatingNativeView(const Value: Boolean);
    /// <summary><c>True</c> if TListView is transparent</summary>
    function GetIsTransparent: Boolean;
    /// <summary>Obtain control opacity</summary>
    function GetOpacity: Single;
    /// <summary>Obtain background color defined by TListView style</summary>
    function GetBackgroundStyleColor: TAlphaColor;
    /// <summary>Request complete recreation of presentation</summary>
    procedure RecreateNativePresentation;
  end;

  /// <summary>Used to check if there is a design presentation attached to ListView</summary>
  IListViewDesignPresentationParent = interface
    ['{C62F3FE5-FE96-47A7-99CB-2EEBC85664FA}']
    ///<summary>True if design presentation is attached</summary>
    function HasDesignPresentationAttached: Boolean;
  end;

  /// <summary>A drawable shim extension to apply bounds changes from 
  /// the designer.</summary>
  IListViewDrawableShim = interface
    ['{9FB67E2A-37B9-473B-A95A-13EDD19ED91B}']
    ///<summary>Calculate appearance PlaceOffset, Width, Height for given rect from designer</summary>
    function CalcAppearanceBounds(const AValue: TRect; const CurrentBounds: TRectF): TRectF;
  end;

  /// <summary>Predicate used for item filtering.
  /// <see cref='IListViewFilterable'></see></summary>
  TFilterPredicate = TPredicate<string>;

  TListItemsList = TList<TListItem>;

  /// <summary>IListViewAdapter provides interface between the data and their representation.
  /// The essential part of this interface is implemented in FMX.ListView.Adapters.Base.TAbstractListViewAdapter
  /// </summary>
  IListViewAdapter = interface
    ['{6E850F76-BABD-4756-BF05-A30C66A692AD}']
    /// <summary>Return number of items that this Adapter represents. See Item[Index]. </summary>
    function GetCount: Integer;
    /// <summary>Get TListItem by index Index</summary>
    function GetItem(const Index: Integer): TListItem;
    /// <summary>Get index of given TListItem</summary>
    function IndexOf(const AItem: TListItem): Integer;
    /// <summary>Return TEnumerator&lt;TListItem&gt;</summary>
    function GetEnumerator: TEnumerator<TListItem>;
    /// <summary>Height of items that do not have it explicitly defined</summary>
    function GetDefaultViewHeight: Integer;
    /// <summary>Subscribe to OnChanged event</summary>
    procedure SetOnChanged(const Value: TNotifyEvent);
    /// <summary>Subscribe to OnItemsMayChange event</summary>
    procedure SetOnItemsMayChange(const Value: TNotifyEvent);
    /// <summary>Subscribe to OnItemsCouldHaveChanged event</summary>
    procedure SetOnItemsCouldHaveChanged(const Value: TNotifyEvent);
    /// <summary>Subscribe to OnItemsInvalidate event</summary>
    procedure SetOnItemsInvalidate(const Value: TNotifyEvent);
    /// <summary>Subscribe to OnItemsResize event</summary>
    procedure SetOnItemsResize(const Value: TNotifyEvent);
    /// <summary>Subscribe to OnResetView event</summary>
    procedure SetOnResetView(const Value: TNotifyEvent);
    /// <summary>Notifies adapter about item's changes.</summary>
    procedure Changed;
    /// <summary>Sort data</summary>
    procedure Sort(AComparer: IComparer<TListItem>);
    /// <summary>Called by TListView every time it needs to paint. In dynamic adapters this is where
    /// new TListItems should be created for data.</summary>
    procedure CreateNewViews;
    /// <summary>Recreate views for items that have specified purposes. May be called when item
    /// views may need update, for example when host TListView is being resized</summary>
    procedure ResetViews(const Purposes: TListItemPurposes);
    // <summary>Called by ResetViews to invoke OnResetView event for each ListItem</summary>
    procedure ResetView(const Item: TListItem);
    /// <summary>Get item by Index. Items would normally be already created by CreateNewViews by the time
    ///  this property is accessed. Index should be in range of [0, Count)</summary>
    property Item[const Index: Integer]: TListItem read GetItem; default;
    /// <summary>Count of items</summary>
    property Count: Integer read GetCount;
    /// <summary>Invoked when items have changed</summary>
    property OnChanged: TNotifyEvent write SetOnChanged;
    /// <summary>Invoked before an edit operation, items or their contents may change</summary>
    property OnItemsMayChange: TNotifyEvent write SetOnItemsMayChange;
    /// <summary>Invoked after an edit operation, items could have been changed</summary>
    property OnItemsCouldHaveChanged: TNotifyEvent write SetOnItemsCouldHaveChanged;
    /// <summary>Invoked when items are invalidated and a repaint is necessary</summary>
    property OnItemsInvalidate: TNotifyEvent write SetOnItemsInvalidate;
    /// <summary>Item sizes were changed, notify the view that the sizes of items need recalculation</summary>
    property OnItemsResize: TNotifyEvent write SetOnItemsResize;
    /// <summary>View has been reset</summary>
    property OnResetView: TNotifyEvent write SetOnResetView;
  end;

  IListViewEditor = interface;
  TBeforeItemAddedNotify = procedure(Sender: IListViewEditor) of object;
  TAfterItemAddedNotify = procedure(Sender: IListViewEditor; const Item: TListItem) of object;
  TBeforeItemDeletedNotify = procedure(Sender: IListViewEditor; const Index: Integer) of object;
  TAfterItemDeletedNotify = procedure(Sender: IListViewEditor) of object;

  /// <summary>Extension of IListViewAdapter for editable content. Implemented by TAppearanceListViewItems</summary>
  IListViewEditor = interface
    ['{19A0606B-8C8E-49B2-A6B3-A708B7B8AD46}']
    /// <summary>Create a new Item and append at end</summary>
    function Add: TListItem;
    /// <summary>Delete Item at Index</summary>
    procedure Delete(const Index: Integer);
    /// <summary>Create a new Item and insert at Index</summary>
    function Insert(const Index: Integer): TListItem;
    /// <summary>Delete all items</summary>
    procedure Clear;
    /// <summary>Set OnBeforeItemAdded handler</summary>
    procedure SetBeforeItemAdded(const AHandler: TBeforeItemAddedNotify);
    /// <summary>Set OnAfterItemAdded handler</summary>
    procedure SetAfterItemAdded(const AHandler: TAfterItemAddedNotify);
    /// <summary>Set OnBeforeItemDeleted handler</summary>
    procedure SetBeforeItemDeleted(const AHandler: TBeforeItemDeletedNotify);
    /// <summary>Set OnAfterItemDeleted handler</summary>
    procedure SetAfterItemDeleted(const AHandler: TAfterItemDeletedNotify);
    /// <summary>Notification before item is added</summary>
    property OnBeforeItemAdded: TBeforeItemAddedNotify write SetBeforeItemAdded;
    /// <summary>Notification after item is added</summary>
    property OnAfterItemAdded: TAfterItemAddedNotify write SetAfterItemAdded;
    /// <summary>Notification before item is deleted</summary>
    property OnBeforeItemDeleted: TBeforeItemDeletedNotify write SetBeforeItemDeleted;
    /// <summary>Notification after item is deleted</summary>
    property OnAfterItemDeleted: TAfterItemDeletedNotify write SetAfterItemDeleted;
  end;

  /// <summary>Extension of IListViewAdapter for items with checkboxes.
  /// Implemented by TAppearanceListViewItems</summary>
  IListViewCheckProvider = interface
    ['{032EB974-1C25-4B5E-BB07-01FA82554748}']
    /// <summary>Index of first checked item</summary>
    function FirstChecked(const Checked: Boolean = True): Integer;
    /// <summary>A quick query to see if one or all of the items are in checked state.</summary>
    /// <returns><para>If AChecked = True, True if at least one item is checked</para>
    /// <para> If AChecked = False, True if every item is checked</para>
    /// </returns>
    function AnyChecked(const AChecked: Boolean = True): Boolean;
    /// <summary>Change check state of all items</summary>
    procedure CheckAll(const NewState: Boolean = True);
    /// <summary>Get checked state for item at Index</summary>
    function GetChecked(const Index: Integer): Boolean;
    /// <summary>Set checked state for item at Index</summary>
    procedure SetChecked(const Index: Integer; const Value: Boolean);
    /// <summary>Get/set checked state of item at Index</summary>
    property Checked[const Index: Integer]: Boolean read GetChecked write SetChecked; default;
  end;

  /// <summary>Extension of IListViewAdapter for items with text and indexes.
  /// Implemented by TAppearanceListViewItems</summary>
  IListViewTextProvider = interface
    ['{C6D52C15-423D-4B2F-AC87-7D7D47A9C7CC}']
    /// <summary>Get primary text of item at Index</summary>
    function GetText(const Index: Integer): string;
    /// <summary>Get index title at Index</summary>
    function GetIndexTitle(const Index: Integer): string;
    /// <summary>Primary text of item at Index</summary>
    property Text[const Index: Integer]: string read GetText;
    /// <summary>Index title of item at Index</summary>
    property IndexTitle[const Index: Integer]: string read GetIndexTitle;
  end;

  /// <summary>Extension of IListViewAdapter for items with embedded text buttons.
  /// Implemented by TAppearanceListViewItems</summary>
  IListViewTextButtonProvider = interface
    ['{42CC3926-0A23-465B-9ECE-229C60B3BA8E}']
    /// <summary>Get drawable of text button for item at Index</summary>
    function GetTextButtonDrawable(const Index: Integer): TListItemTextButton;
    /// <summary>Drawable of text button for item at Index</summary>
    property TextButtonDrawable[const Index: Integer]: TListItemTextButton read GetTextButtonDrawable;
  end;

  /// <summary>Extension of IListViewAdapter for items with glyph buttons.
  /// Implemented by TAppearanceListViewItems</summary>
  IListViewGlyphButtonProvider = interface
    ['{64FF4B01-E378-4F40-A9A5-E4C1A7C942D6}']
    /// <summary>Get drawable of button for item at Index</summary>
    function GetGlyphButtonDrawable(const Index: Integer): TListItemGlyphButton;
    /// <summary>Drawable of button for item at Index</summary>
    property GlyphButtonDrawable[const Index: Integer]: TListItemGlyphButton read GetGlyphButtonDrawable;
  end;

  /// <summary>Extension of IListViewAdapter for items with data.
  /// Implemented by TAppearanceListViewItems</summary>
  IListViewExtrasProvider = interface
    ['{0BCFB611-3763-4C49-974F-1104F6116D6E}']
    /// <summary>Get indexed data DataIndex for item at Index</summary>
    function GetItemData(const Index: Integer; const DataIndex: string): TValue;
    /// <summary>Set indexed data DataIndex for item at Index</summary>
    procedure SetItemData(const Index: Integer; const DataIndex: string; const AValue: TValue);
    /// <summary>True if item at Index has indexed data DataIndex</summary>
    function GetHasData(const Index: Integer; const DataIndex: string): Boolean;
    /// <summary>Get tag of item at Index</summary>
    function GetItemTag(const Index: Integer): NativeInt;
    /// <summary>Set tag of item at Index</summary>
    procedure SetItemTag(const Index: Integer; const AValue: NativeInt);

    /// <summary>Indexed data DataIndex of item at Index</summary>
    property Data[const Index: Integer; const DataIndex: string]: TValue read GetItemData write SetItemData;
    /// <summary>Tag of item at Index</summary>
    property Tag[const Index: Integer]: NativeInt read GetItemTag write SetItemTag;
    /// <summary>True if item at Index has Indexed data DataIndex</summary>
    property HasData[const Index: Integer; const DataIndex: string]: Boolean read GetHasData;
  end;

  /// <summary>Extension of IListViewAdapter items of which can be filtered by a search box.
  /// Implemented by TAppearanceListViewItems</summary>
  IListViewFilterable = interface
    ['{02F85899-8787-4378-9622-105820EB4577}']
    /// <summary>Get filter predicate</summary>
    function GetFilterPredicate: TFilterPredicate;
    /// <summary>Set filter predicate</summary>
    procedure SetFilterPredicate(const Value: TFilterPredicate);
    /// <summary>Return a complete list of all items regardless of filter state</summary>
    function GetUnfilteredItems: TListItemsList;
    /// <summary>True if filter is applied</summary>
    function GetFiltered: Boolean;

    /// <summary>Notifies the adapter that all items have been deleted</summary>
    procedure ItemsCleared;
    /// <summary>Notifies the adapter that item at Index have been deleted</summary>
    procedure ItemDeleted(const Index: Integer);
    /// <summary>Notifies the adapter that item at Index have been added</summary>
    procedure ItemAdded(const Index: Integer; const Item: TListItem);

    /// <summary>Complete list of all items regardless of filter state</summary>
    property UnfilteredItems: TListItemsList read GetUnfilteredItems;
    /// <summary>True if filter is applied</summary>
    property Filtered: Boolean read GetFiltered;
    /// <summary>Filter predicate</summary>
    property Filter: TFilterPredicate read GetFilterPredicate write SetFilterPredicate;
  end;

//== INTERFACE END: FMX.ListView.Types
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Edit (from FMX.Edit.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


const
  MM_EDIT_SELSTART_CHANGED = MM_USER + 1;
  MM_EDIT_SELLENGTH_CHANGED = MM_USER + 2;
  MM_EDIT_READONLY_CHANGED = MM_USER + 3;
  MM_EDIT_MAXLENGTH_CHANGED = MM_USER + 4;
  MM_EDIT_ISPASSWORD_CHANGED = MM_USER + 5;
  MM_EDIT_IMEMODE_CHANGED = MM_USER + 6;
  MM_EDIT_KEYBOARDTYPE_CHANGED = MM_USER + 7;
  MM_EDIT_RETURNKEYTYPE_CHANGED = MM_USER + 8;
  MM_EDIT_KILLFOCUSBYRETURN_CHANGED = MM_USER + 9;
  MM_EDIT_CHECKSPELLING_CHANGED = MM_USER + 10;
  MM_EDIT_PROMPTTEXT_CHANGED = MM_USER + 11;
  MM_EDIT_CARETPOSITION_CHANGED = MM_USER + 15;
  MM_EDIT_CARETCHANGED = MM_USER + 16;
  MM_EDIT_TYPING_CHANGED = MM_USER + 17;
  MM_EDIT_TEXT_SETTINGS_CHANGED = MM_USER + 18;
  MM_EDIT_TEXT_CHANGED = MM_USER + 19;
  MM_EDIT_EDITBUTTONS_CHANGED = MM_USER + 21;
  MM_EDIT_TEXT_CHANGING = MM_USER + 22;
  MM_EDIT_CHARCASE_CHANGED = MM_USER + 23;
  MM_EDIT_FILTERCHAR_CHANGED = MM_USER + 24;
  MM_EDIT_GET_CARET_POSITION_BY_POINT = MM_USER + 25;
  MM_EDIT_CAN_SET_FOCUS = MM_USER + 26;
  MM_EDIT_AUTOSELECT_CHANGED = MM_USER + 27;
  MM_EDIT_HIDESELECTIONONEXIT_CHANGED = MM_USER + 28;
  MM_EDIT_USER = MM_USER + 29;

  PM_EDIT_REALIGN_BUTTONS_CONTAINER = PM_USER + 1;
  PM_EDIT_GET_TEXT_CONTENT_RECT = PM_USER + 2;
  PM_EDIT_UNDO_MANAGER_INSERT_TEXT = PM_USER + 3;
  PM_EDIT_UNDO_MANAGER_DELETE_TEXT = PM_USER + 4;
  PM_EDIT_UNDO_MANAGER_UNDO = PM_USER + 5;
  PM_EDIT_USER = PM_USER + 6;

type

{ TCustomEdit }

  TCustomEditModel = class(TDataModel, ITextLinesSource)
  public const
    DefaultSelectionColor = $802A8ADF;
    DefaultHorzAlign = TTextAlign.Leading;
    DefaultFontColor = TAlphaColorRec.Black;
    DefaultInputSupport = True;
    DefaultCharCase = TEditCharCase.ecNormal;
    DefaultAutoSelect = False;
    DefaultHideSelectionOnExit = True;
  public type
    /// <summary>Data for requesting caret position by HitTest point.</summary>
    TGetCaretPositionInfo = record
      HitPoint: TPointF;
      CaretPosition: Integer;
    end;
  private
    FChanged: Boolean;
    FText: string;
    FSelStart: Integer;
    FSelLength: Integer;
    FReadOnly: Boolean;
    FMaxLength: Integer;
    FPassword: Boolean;
    FKeyboardType : TVirtualkeyboardType;
    FReturnKeyType: TReturnKeyType;
    FImeMode: TImeMode;
    FHideSelectionOnExit: Boolean;
    FKillFocusByReturn: Boolean;
    FCheckSpelling: Boolean;
    FTextPrompt: string;
    FCaretPosition: Integer;
    FCaret: TCustomCaret;
    FTyping: Boolean;
    FFilterChar: string;
    FInputSupport: Boolean;
    FTextSettingsInfo: TTextSettingsInfo;
    FSelectionFill: TBrush;
    FOnChange: TNotifyEvent;
    FOnChangeTracking: TNotifyEvent;
    FOnTyping: TNotifyEvent;
    FOnValidating: TValidateTextEvent;
    FOnValidate: TValidateTextEvent;
    FValidating: Boolean;
    FCharCase: TEditCharCase;
    FAutoSelect: Boolean;
    procedure SetAutoSelect(const Value: Boolean);
    procedure SetSelStart(const Value: Integer);
    procedure SetSelLength(const Value: Integer);
    procedure SetMaxLength(const Value: Integer);
    procedure SetReadOnly(const Value: Boolean);
    procedure SetPassword(const Value: Boolean);
    procedure SetImeMode(const Value: TImeMode);
    procedure SetKeyboardType(const Value: TVirtualKeyboardType);
    procedure SetReturnKeyType(const Value: TReturnKeyType);
    procedure SetKillFocusByReturn(const Value: Boolean);
    procedure SetCheckSpelling(const Value: Boolean);
    procedure SetTextPrompt(const Value: string);
    procedure SetCaretPosition(const Value: Integer);
    procedure SetCaret(const Value: TCustomCaret);
    procedure SetTyping(const Value: Boolean);
    /// <remarks>
    ///   Invokes sequence: DoFiltering -> DoTruncating -> DoValidating
    /// </remarks>
    procedure SetText(const Value: string);
    procedure SetSelectionFill(const Value: TBrush);
    procedure SetFilterChar(const Value: string);
    procedure SetCharCase(const Value: TEditCharCase);
    function CanSetFocus: Boolean;
    procedure SetHideSelectionOnExit(const Value: Boolean);
    { ITextLinesSource }
    function GetLine(const ALineIndex: Integer): string;
    function GetLineBreak: string;
    function GetCount: Integer;
    function TextPosToPos(const APos: Integer): TCaretPosition;
    function PosToTextPos(const APosition: TCaretPosition): Integer;
    function GetText: string;
  protected
    ///<summary>Initial text filtering before calling <c>DoTruncating</c></summary>
    function DoFiltering(const Value: string): string; virtual;
    ///<summary>Maximum available text length filtering before calling <c>DoValidating</c></summary>
    function DoTruncating(const Value: string): string; virtual;
    ///<summary>Validate inputing text. Calling before OnChangeTracking</summary>
    function DoValidating(const Value: string): string; virtual;
    function DoValidate(const Value: string): string; virtual;
    procedure DoChangeTracking; virtual;
    procedure DoChange; virtual;
    procedure ResultTextSettingsChanged; virtual;
    function GetTextSettingsClass: TTextSettingsInfo.TCustomTextSettingsClass; virtual;
    /// <summary>
    ///   This property indicates that the control is in validate value mode. See DoValidate, Change
    /// </summary>
    property Validating: Boolean read FValidating;
  public
    constructor Create; override;
    destructor Destroy; override;
    function HasSelection: Boolean;
    function SelectedText: string;
    procedure Change;
    ///<summary>Set text in model without text validation and sending notification to presenter</summary>
    procedure SetTextWithoutValidation(const Value: string);

    { Editing }
    ///<summary>Insert text in memo after defined position</summary>
    procedure InsertAfter(const APosition: Integer; const AFragment: string; const Options: TInsertOptions);
    ///<summary>Delete fragment of the text from the memo after defined position</summary>
    procedure DeleteFrom(const APosition: Integer; const ALength: Integer; const Options: TDeleteOptions);
    /// <summary>Replace fragment of text from the memo in the specifeid range.</summary>
    procedure Replace(const APosition: Integer; const ALength: Integer; const AFragment: string);

    function GetPositionShift(const APosition: Integer; const ADelta: Integer): Integer;
    function GetNextWordBegin(const APosition: Integer): Integer;
    function GetPrevWordBegin(const APosition: Integer): Integer;
    { Caret position }
    procedure MoveCaretHorizontal(const ADelta: Integer);
    procedure MoveCaretLeft;
    procedure MoveCaretRight;
    /// <summary>Returns caret position by specified hittest point.</summary>
    /// <remarks>Works only for <c>TEdit.ControlType=Styled</c>.</remarks>
    function GetCaretPositionByPoint(const AHitPoint: TPointF): Integer;
  public
    ///<summary>Select all text when control getting focus</summary>
    property AutoSelect: Boolean read FAutoSelect write SetAutoSelect;
    property CaretPosition: Integer read FCaretPosition write SetCaretPosition;
    property Caret: TCustomCaret read FCaret write SetCaret;
    property CheckSpelling: Boolean read FCheckSpelling write SetCheckSpelling;
    property FilterChar: string read FFilterChar write SetFilterChar;
    ///<summary>Do not draw selected text region when component not in focus</summary>
    property HideSelectionOnExit: Boolean read FHideSelectionOnExit write SetHideSelectionOnExit default True;
    ///<summary>Text control is in read-only mode</summary>
    property ReadOnly: Boolean read FReadOnly write SetReadOnly;
    property ImeMode: TImeMode read FImeMode write SetImeMode;
    property InputSupport: Boolean read FInputSupport write FInputSupport;
    property KeyboardType : TVirtualkeyboardType read FKeyboardType write SetKeyboardType;
    property KillFocusByReturn: Boolean read FKillFocusByReturn write SetKillFocusByReturn;
    property MaxLength: Integer read FMaxLength write SetMaxLength;
    property Password: Boolean read FPassword write SetPassword;
    property ReturnKeyType: TReturnKeyType read FReturnKeyType write SetReturnKeyType;
    property SelectionFill: TBrush read FSelectionFill write SetSelectionFill;
    property SelStart: Integer read FSelStart write SetSelStart;
    property SelLength: Integer read FSelLength write SetSelLength;
    property Text: string read FText write SetText;
    property TextSettingsInfo: TTextSettingsInfo read FTextSettingsInfo;
    property TextPrompt: string read FTextPrompt write SetTextPrompt;
    property Typing: Boolean read FTyping write SetTyping;
    ///<summary>Defines character case for text in component</summary>
    property CharCase: TEditCharCase read FCharCase write SetCharCase;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    property OnChangeTracking: TNotifyEvent read FOnChangeTracking write FOnChangeTracking;
    property OnTyping: TNotifyEvent read FOnTyping write FOnTyping;
    property OnValidating: TValidateTextEvent read FOnValidating write FOnValidating;
    property OnValidate: TValidateTextEvent read FOnValidate write FOnValidate;
  end;

  TCustomEdit = class;

  TContentEdit = class(TContent)
  private
    function GetEdit: TCustomEdit;
  protected
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoInsertObject(Index: Integer; const AObject: TFmxObject); override;
  public
    constructor Create(AOwner: TComponent); override;
    property Edit: TCustomEdit read GetEdit;
  end;

  TCustomEdit = class(TPresentedControl, ITextActions, IVirtualKeyboardControl, IItemsContainer, ITextSettings,
    IReadOnly, ICaret)
  private
    FButtonsContent: TContentEdit;
    FSavedReadOnly: Boolean;
    FSavedMaxLength: Integer;
    FSavedTextAlign: TTextAlign;
    function GetAutoSelect: Boolean;
    procedure SetAutoSelect(const Value: Boolean);
    function GetOriginCaretPosition: Integer;
    procedure SetSelText(const Value: string);
    function GetSelText: string;
    procedure SetSelLength(const Value: Integer);
    function GetSelLength: Integer;
    procedure SetSelStart(const Value: Integer);
    function GetSelStart: Integer;
    procedure SetCaretPosition(const Value: Integer);
    function GetCaretPosition: Integer;
    procedure SetCaret(const Value: TCustomCaret);
    function GetCaret: TCustomCaret;
    procedure SetPromptText(const Prompt: string);
    function GetPromptText: string;
    procedure SetOnChange(const Value: TNotifyEvent);
    function GetOnChange: TNotifyEvent;
    procedure SetOnChangeTracking(const Value: TNotifyEvent);
    function GetOnChangeTracking: TNotifyEvent;
    procedure SetMaxLength(const Value: Integer);
    function GetMaxLength: Integer;
    procedure SetPassword(const Value: Boolean);
    function GetPassword: Boolean;
    procedure SetOnTyping(const Value: TNotifyEvent);
    function GetOnTyping: TNotifyEvent;
    procedure SetKillFocusByReturn(const Value: Boolean);
    function GetKillFocusByReturn: Boolean;
    procedure SetCheckSpelling(const Value: Boolean);
    function GetCheckSpelling: Boolean;
    function GetSelectionFill: TBrush;
    function GetCharCase: TEditCharCase;
    procedure SetCharCase(const Value: TEditCharCase);
    { ITextSettings }
    function GetDefaultTextSettings: TTextSettings;
    function GetTextSettings: TTextSettings;
    function GetResultingTextSettings: TTextSettings;
    function GetStyledSettings: TStyledSettings;
    procedure SetTextAlign(const Value: TTextAlign);
    function GetTextAlign: TTextAlign;
    procedure SetVertTextAlign(const Value: TTextAlign);
    function GetVertTextAlign: TTextAlign;
    procedure SetFont(const Value: TFont);
    function GetFont: TFont;
    procedure SetFontColor(const Value: TAlphaColor);
    function GetFontColor: TAlphaColor;
    function GetTyping: Boolean;
    procedure SetTyping(const Value: Boolean);
    function GetFilterChar: string;
    procedure SetFilterChar(const Value: string);
    function GetInputSupport: Boolean;
    function GetModel: TCustomEditModel; overload;
    function GetTextContentRect: TRectF;
    function GetOnValidate: TValidateTextEvent;
    function GetOnValidating: TValidateTextEvent;
    procedure SetOnValidate(const Value: TValidateTextEvent);
    procedure SetOnValidating(const Value: TValidateTextEvent);
    procedure ReadReadOnly(Reader: TReader);
    function GetHideSelectionOnExit: Boolean;
    procedure SetHideSelectionOnExit(const Value: Boolean);
    { IReadOnly }
    procedure SetReadOnly(const Value: Boolean);
    function GetReadOnly: Boolean;
    { ICaret }
    function ICaret.GetObject = GetCaret;
    procedure ShowCaret;
    procedure HideCaret;
  protected
    FClipboardSvc: IFMXExtendedClipboardService;
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;
    procedure Loaded; override;
    function GetText: string; virtual;
    procedure SetText(const Value: string); virtual;
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoInsertObject(Index: Integer; const AObject: TFmxObject); override;
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    function GetImeMode: TImeMode; virtual;
    procedure SetImeMode(const Value: TImeMode); virtual;
    procedure SetInputSupport(const Value: Boolean); virtual;
    procedure DefineProperties(Filer: TFiler); override;
    function GetDefaultSize: TSizeF; override;
    procedure Resize; override;
    procedure RealignButtonsContainer; virtual;
    function GetCanFocus: Boolean; override;
    { Live Binding }
    function CanObserve(const ID: Integer): Boolean; override;
    procedure ObserverAdded(const ID: Integer; const Observer: IObserver); override;
    procedure ObserverToggle(const AObserver: IObserver; const Value: Boolean);
    { ITextSettings }
    procedure SetTextSettings(const Value: TTextSettings); virtual;
    procedure SetStyledSettings(const Value: TStyledSettings); virtual;
    function StyledSettingsStored: Boolean; virtual;
    { IVirtualKeyboardControl }
    procedure SetKeyboardType(Value: TVirtualKeyboardType);
    function GetKeyboardType: TVirtualKeyboardType;
    procedure SetReturnKeyType(Value: TReturnKeyType);
    function GetReturnKeyType: TReturnKeyType;
    function IVirtualKeyboardControl.IsPassword = GetPassword;
    property InputSupport: Boolean read GetInputSupport write SetInputSupport;
    { IItemsContainer }
    function GetItemsCount: Integer;
    function GetItem(const AIndex: Integer): TFmxObject;
    procedure ButtonsChanged; virtual;
  protected
    function DefineModelClass: TDataModelClass; override;
    function DefinePresentationName: string; override;
  public
    property ControlType;
    property Model: TCustomEditModel read GetModel;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure SelectAll(const AKeepCaretPosition: Boolean); overload;
    { ITextActions }
    procedure DeleteSelection;
    procedure CopyToClipboard;
    procedure CutToClipboard;
    procedure PasteFromClipboard;
    procedure SelectAll; overload;
    procedure SelectWord;
    procedure ResetSelection;
    procedure GoToTextEnd;
    procedure GoToTextBegin;
    procedure Replace(const AStartPos: Integer; const ALength: Integer; const AStr: string);
    function HasSelection: Boolean;
    procedure Undo;
  public
    ///<summary>Determines whether all the text in the edit is automatically selected when the control gets
    ///focus</summary>
    property AutoSelect: Boolean read GetAutoSelect write SetAutoSelect;
    property ButtonsContent: TContentEdit read FButtonsContent;
    property Caret: TCustomCaret read GetCaret write SetCaret;
    property CaretPosition: Integer read GetCaretPosition write SetCaretPosition;
    property TextContentRect: TRectF read GetTextContentRect;
    property CheckSpelling: Boolean read GetCheckSpelling write SetCheckSpelling default False;
    property DefaultTextSettings: TTextSettings read GetDefaultTextSettings;
    property Font: TFont read GetFont write SetFont;
    property FontColor: TAlphaColor read GetFontColor write SetFontColor default TAlphaColorRec.Black;
    property FilterChar: string read GetFilterChar write SetFilterChar;
    property ImeMode: TImeMode read GetImeMode write SetImeMode default TImeMode.imDontCare;
    property KeyboardType: TVirtualKeyboardType read GetKeyboardType write SetKeyboardType default TVirtualKeyboardType.Default;
    property KillFocusByReturn: Boolean read GetKillFocusByReturn write SetKillFocusByReturn default False;
    property MaxLength: Integer read GetMaxLength write SetMaxLength default 0;
    ///<summary>Determines whether to cancel the visual indication of the selected text when the focus moves to another
    ///control.</summary>
    property HideSelectionOnExit: Boolean read GetHideSelectionOnExit write SetHideSelectionOnExit;
    property Password: Boolean read GetPassword write SetPassword default False;
    property ReadOnly: Boolean read GetReadOnly write SetReadOnly default False;
    property ReturnKeyType: TReturnKeyType read GetReturnKeyType write SetReturnKeyType default TReturnKeyType.Default;
    property ResultingTextSettings: TTextSettings read GetResultingTextSettings;
    property SelectionFill: TBrush read GetSelectionFill;
    property SelStart: Integer read GetSelStart write SetSelStart;
    property SelLength: Integer read GetSelLength write SetSelLength;
    property SelText: string read GetSelText write SetSelText;
    property StyledSettings: TStyledSettings read GetStyledSettings write SetStyledSettings stored StyledSettingsStored nodefault;
    property Text: string read GetText write SetText;
    property TextAlign: TTextAlign read GetTextAlign write SetTextAlign default TTextAlign.Leading;
    property TextSettings: TTextSettings read GetTextSettings write SetTextSettings;
    property TextPrompt: string read GetPromptText write SetPromptText;
    property Typing: Boolean read GetTyping write SetTyping default False;
    property VertTextAlign: TTextAlign read GetVertTextAlign write SetVertTextAlign default TTextAlign.Center;
    ///<summary>Defines whether to implement the 'UPPER' or 'lower' case conversion to the memo's text</summary>
    property CharCase: TEditCharCase read GetCharCase write SetCharCase;
    property OnChange: TNotifyEvent read GetOnChange write SetOnChange;
    property OnChangeTracking: TNotifyEvent read GetOnChangeTracking write SetOnChangeTracking;
    property OnTyping: TNotifyEvent read GetOnTyping write SetOnTyping;
    property OnValidating: TValidateTextEvent read GetOnValidating write SetOnValidating;
    property OnValidate: TValidateTextEvent read GetOnValidate write SetOnValidate;
  published
    property Align;
    property Anchors;
    property StyleLookup;
    property TabOrder;
    property TabStop;
  end;

{ TEditButton }

  IEditControl = interface
    ['{4C7EE0A7-06EC-4515-B843-B608FB984468}']
    function BoundsRect: TRectF;
    function GetControl: TControl;
  end;

  TEditButton = class(TCustomButton, IEditControl)
  protected
    function GetDefaultStyleLookupName: string; override;
    procedure SetName(const NewName: TComponentName); override;
    function GetDefaultSize: TSizeF; override;
    { IEditControl }
    function IEditControl.BoundsRect = GetBoundsRect;
    function GetControl: TControl;
  public
    constructor Create(AOwner: TComponent); override;
    function GetEdit: TCustomEdit;
  published
    property Action;
    property Anchors;
    property AutoTranslate default True;
    property CanFocus default True;
    property CanParentFocus;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DisableFocusEffect;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property TextSettings;
    property Font;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property IsPressed default False;
    property Locked default False;
    property Padding;
    property ModalResult default mrNone;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RepeatClick default False;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StaysPressed default False;
    property StyleLookup;
    property TabOrder;
    property Text;
    property TextAlign default TTextAlign.Center;
    property TouchTargetExpansion;
    property Visible default True;
    property Width;
    property WordWrap default False;
    property ParentShowHint;
    property ShowHint;
    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnKeyDown;
    property OnKeyUp;
    property OnCanFocus;
    property OnClick;
    property OnDblClick;
    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TClearEditButton }

  TClearEditButton = class(TEditButton)
  protected
    procedure Click; override;
    function GetDefaultStyleLookupName: string; override;
  end;

{ TPasswordEditButton }

  TPasswordEditButton = class(TEditButton)
  protected
    function GetDefaultStyleLookupName: string; override;
  public
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X: Single; Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X: Single; Y: Single); override;
  end;

{ TSearchEditButton }

  TSearchEditButton = class(TEditButton)
  protected
    function GetDefaultStyleLookupName: string; override;
  end;

{ TEllipsesEditButton }

  TEllipsesEditButton = class(TEditButton)
  protected
    function GetDefaultStyleLookupName: string; override;
  end;

{ TDropDownEditButton }

  TDropDownEditButton = class(TEditButton)
  protected
    function GetDefaultStyleLookupName: string; override;
  end;

{ TSpinEditButton }

  TSpinEditButton = class(TStyledControl, IEditControl)
  private
    FRepeatClick: Boolean;
    { Style }
    FUpButton: TCustomButton;
    FDownButton: TCustomButton;
    { Events }
    FOnUpClick: TNotifyEvent;
    FOnDownClick: TNotifyEvent;
    procedure SetRepeatClick(const Value: Boolean);
  protected
    { Style }
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    function GetDefaultStyleLookupName: string; override;
    function GetDefaultSize: TSizeF; override;
    { Events }
    procedure DoUpButtonClick(Sender: TObject);
    procedure DoDownButtonClick(Sender: TObject);
    { IEditControl }
    function IEditControl.BoundsRect = GetBoundsRect;
    function GetControl: TControl;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Anchors;
    property AutoTranslate default True;
    property CanFocus default True;
    property CanParentFocus;
    property ClipChildren default False;
    property ClipParent default False;
    property Cursor default crDefault;
    property DisableFocusEffect;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest default True;
    property Locked default False;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RepeatClick: Boolean read FRepeatClick write SetRepeatClick default False;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TouchTargetExpansion;
    property Visible default True;
    property Width;
    property ParentShowHint;
    property ShowHint;
    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnKeyDown;
    property OnKeyUp;
    property OnDownClick: TNotifyEvent read FOnDownClick write FOnDownClick;
    property OnUpClick: TNotifyEvent read FOnUpClick write FOnUpClick;
    property OnCanFocus;
    property OnClick;
    property OnDblClick;
    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TEdit }

  TEdit = class(TCustomEdit)
  public
    property Action;
  published
    property ControlType;
    property OnPresentationNameChoosing;
    { inherited }
    property AutoSelect default TCustomEditModel.DefaultAutoSelect;
    property Cursor default crIBeam;
    property CanFocus default True;
    property CanParentFocus;
    property DisableFocusEffect;
    property KeyboardType;
    property ReturnKeyType;
    property Password;
    property ReadOnly;
    ///<summary>Maxmimum length of text that can be input in the edit field.</summary>
    ///<remarks>On Android due to platform limitations text is truncated only after pressing ENTER key or after losing
    ///focus.</remarks>
    property MaxLength;
    property HideSelectionOnExit default TCustomEditModel.DefaultHideSelectionOnExit;
    ///<summary>Defines characters which can be input in the edit field. All characters not in FilterChar will be
    ///ignored. Empty FilterChar value means no filtering.</summary>
    ///<remarks>On Android due to platform limitations text is filtered only after pressing ENTER key or after control
    ///losing focus.</remarks>
    property FilterChar;
    property Text;
    property TextSettings;
    property ImeMode;
    property Position;
    property Width;
    property Height;
    property ClipChildren default False;
    property ClipParent default False;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Locked default False;
    property Hint;
    property HitTest default True;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property TextPrompt;
    property StyleLookup;
    property StyledSettings;
    property TouchTargetExpansion;
    property Visible default True;
    property Caret;
    property KillFocusByReturn;
    property CheckSpelling;
    property ParentShowHint;
    property ShowHint;
    property CharCase default TCustomEditModel.DefaultCharCase;
    { events }
    property OnChange;
    property OnChangeTracking;
    property OnTyping;
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnValidating;
    property OnValidate;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnKeyDown;
    property OnKeyUp;
    property OnCanFocus;
    property OnClick;
    property OnDblClick;
    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TClearingEdit }

  TClearingEdit = class(TEdit)
  protected
    function DefinePresentationName: string; override;
    function GetDefaultStyleLookupName: string; override;
  public
    constructor Create(AOwner: TComponent); override;
  end deprecated 'Use TEdit with TClearEditButton';

//== INTERFACE END: FMX.Edit
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Layouts (from FMX.Layouts.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type

{ TLayout }

  TLayout = class(TControl)
  protected
    procedure Paint; override;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Align;
    property Anchors;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DragMode;
    property EnableDragHighlight;
    property Enabled;
    property Locked;
    property Height;
    property Hint;
    property HitTest default False;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    property TabOrder;
    property TabStop;
    { Events }
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    { Drag and Drop events }
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    { Mouse events }
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
  end;

{ TScaledLayout }

  TScaledLayout = class(TControl)
  private
    FOriginalWidth: Single;
    FOriginalHeight: Single;
    procedure SetOriginalWidth(const Value: Single);
    procedure SetOriginalHeight(const Value: Single);
  protected
    procedure DoRealign; override;
    function GetChildrenMatrix(var Matrix: TMatrix; var Simple: Boolean): Boolean; override;
    procedure SetHeight(const Value: Single); override;
    procedure SetWidth(const Value: Single); override;
    procedure Paint; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Align;
    property Anchors;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DragMode;
    property EnableDragHighlight;
    property Enabled;
    property Locked;
    property Height;
    property Hint;
    property HitTest default False;
    property Padding;
    property Opacity;
    property OriginalWidth: Single read FOriginalWidth write SetOriginalWidth;
    property OriginalHeight: Single read FOriginalHeight write SetOriginalHeight;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    { Events }
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    { Drag and Drop events }
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    { Mouse events }
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
  end;

  TCustomScrollBox = class;

{ TScrollContent }

  TScrollContent = class(TContent)
  private
    [Weak] FScrollBox: TCustomScrollBox;
    FIsContentChanged: Boolean;
  protected
    function GetClipRect: TRectF; override;
    function GetChildrenRect: TRectF; override;
    function ObjectAtPoint(P: TPointF): IControl; override;
    function DoGetUpdateRect: TRectF; override;
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoInsertObject(Index: Integer; const AObject: TFmxObject); override;
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    procedure DoRealign; override;
    procedure ContentChanged; override;
    /// <summary> This flag is set in the method ContentChanged. Used to optimize ScrollBox </summary>
    property IsContentChanged: Boolean read FIsContentChanged write FIsContentChanged;
  public
    constructor Create(AOwner: TComponent); override;
    property ScrollBox: TCustomScrollBox read FScrollBox;
    function PointInObjectLocal(X, Y: Single): Boolean; override;
  end;

  TScrollCalculations = class (TAniCalculations)
  private
    [Weak] FScrollBox: TCustomScrollBox;
  protected
    procedure DoChanged; override;
    procedure DoStart; override;
    procedure DoStop; override;
  public
    constructor Create(AOwner: TPersistent); override;
    property ScrollBox: TCustomScrollBox read FScrollBox;
  end;

{ TCustomScrollBox }

  TPositionChangeEvent = procedure (Sender: TObject; const OldViewportPosition, NewViewportPosition: TPointF;
                                    const ContentSizeChanged: Boolean) of object;

  TOnCalcContentBoundsEvent = procedure (Sender: TObject; var ContentBounds: TRectF) of object;

  TCustomScrollBox = class(TStyledControl)
  private
  const
    SmallChangeFraction = 5;
    DesignBorderColor: TAlphaColor = $80A070A0;
  type
    TScrollInfo = record
      [Weak] Scroll: TScrollBar;
      Align: TAlignLayout;
      Margins: TRectF;
    end;
  var
    FSystemInfoSrv: IFMXSystemInformationService;
    FDisableMouseWheel: Boolean;

    FAniCalculations: TScrollCalculations;
    FLastViewportPosition: TPointF;
    FInInternalAlign: Boolean;

    FBackground: TControl;
    FContent: TScrollContent;
    FContentLayout: TControl;
    FContentBounds: TRectF;
    FCachedContentSize: TSizeF;
    FCachedAutoShowing: Boolean;
    FOriginalContentLayoutSize: TSizeF;

    FShowScrollBars: Boolean;
    FAutoHide: Boolean;
    FHScrollInfo: array of TScrollInfo;
    FVScrollInfo: array of TScrollInfo;
    FContentMargins: TRectF;
    FVDisablePaint: Boolean;
    FHDisablePaint: Boolean;
    FGDisablePaint: Boolean;

    FSizeGripContent: TControl;
    FSizeGripParent: TControl;
    FSizeGrip: TControl;
    FShowSizeGrip: Boolean;
    FOnViewportPositionChange: TPositionChangeEvent;
    FOnHScrollChange: TNotifyEvent;
    FOnVScrollChange: TNotifyEvent;
    FOnCalcContentBounds: TOnCalcContentBoundsEvent;
    FMouseEvents: Boolean;
    FContentCalculated: Boolean;
    function HScrollIndex: Integer;
    function VScrollIndex: Integer;
    function GetHScrollAlign: TAlignLayout;
    function GetVScrollAlign: TAlignLayout;
    function GetHScrollMargins: TRectF;
    function GetVScrollMargins: TRectF;
    function GetSceneScale: Single;
    procedure SetShowScrollBars(const Value: Boolean);
    procedure SetShowSizeGrip(const Value: Boolean);
    function GetVScrollBar: TScrollBar;
    function GetHScrollBar: TScrollBar;
    procedure UpdateSizeGrip;
    procedure UpdateVScrollBar(const Value: Single; const ViewportSize: Single);
    procedure UpdateHScrollBar(const Value: Single; const ViewportSize: Single);
    procedure InternalAlign;
    procedure HScrollChangeProc(Sender: TObject);
    procedure VScrollChangeProc(Sender: TObject);
    procedure MousePosToAni(var X, Y: Single);
    procedure SetAutoHide(const Value: Boolean);
    procedure SaveDisablePaint;
    procedure RestoreDisablePaint;
    procedure SetDisablePaint;
    function GetViewportPosition: TPointF;
    procedure SetViewportPosition(const Value: TPointF);
    procedure StartScrolling;
    procedure StopScrolling;
    procedure UpdateOriginalContentLayoutSize(const Force: Boolean);
    procedure ReadPartSize(Reader: TReader; var Size: Single);
    procedure ReadContentLayoutHeight(Reader: TReader);
    procedure ReadContentLayoutWidth(Reader: TReader);
    procedure WriteContentLayoutHeight(Writer: TWriter);
    procedure WriteContentLayoutWidth(Writer: TWriter);
  protected
    //Animation mouse events
    procedure AniMouseDown(const Touch: Boolean; const X, Y: Single); virtual;
    procedure AniMouseMove(const Touch: Boolean; const X, Y: Single); virtual;
    procedure AniMouseUp(const Touch: Boolean; const X, Y: Single); virtual;

    function GetScrollingBehaviours: TScrollingBehaviours;
    procedure Loaded; override;
    procedure PaddingChanged; override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoRealign; override;
    function IsAddToContent(const AObject: TFmxObject): Boolean; virtual;
    procedure ContentAddObject(const AObject: TFmxObject); virtual;
    procedure ContentInsertObject(Index: Integer; const AObject: TFmxObject); virtual;
    procedure ContentBeforeRemoveObject(AObject: TFmxObject); virtual;
    procedure ContentRemoveObject(const AObject: TFmxObject); virtual;
    procedure HScrollChange; virtual;
    procedure VScrollChange; virtual;
    procedure ViewportPositionChange(const OldViewportPosition, NewViewportPosition: TPointF;
                                     const ContentSizeChanged: boolean); virtual;
    procedure CMGesture(var EventInfo: TGestureEventInfo); override;
    procedure Painting; override;
    procedure AfterPaint; override;
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    function IsOpaque: Boolean; virtual;
    function ContentRect: TRectF;
    function VScrollBarValue: Single;
    function HScrollBarValue: Single;
    function CreateScrollContent: TScrollContent; virtual;
    function CreateAniCalculations: TScrollCalculations; virtual;
    procedure DoUpdateAniCalculations(const AAniCalculations: TScrollCalculations); virtual;
    procedure UpdateAniCalculations;
    function DoCalcContentBounds: TRectF; virtual;
    procedure DoRealignContent(R: TRectF); virtual;
    function GetContentBounds: TRectF;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure DoMouseLeave; override;
    procedure MouseWheel(Shift: TShiftState; WheelDelta: Integer; var Handled: Boolean); override;
    property ContentLayout: TControl read FContentLayout;
    property Content: TScrollContent read FContent;
    property HScrollAlign: TAlignLayout read GetHScrollAlign;
    property VScrollAlign: TAlignLayout read GetVScrollAlign;
    property HScrollMargins: TRectF read GetHScrollMargins;
    property VScrollMargins: TRectF read GetVScrollMargins;
    property InInternalAlign: Boolean read FInInternalAlign;
    property HScrollBar: TScrollBar read GetHScrollBar;
    property VScrollBar: TScrollBar read GetVScrollBar;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    property AniCalculations: TScrollCalculations read FAniCalculations;
    property ViewportPosition: TPointF read GetViewportPosition write SetViewportPosition;
    procedure Sort(Compare: TFmxObjectSortCompare); override;
    procedure Center;
    procedure ScrollTo(const Dx, Dy: Single); deprecated 'use ScrollBy(const Dx, Dy: Single)';
    procedure ScrollBy(const Dx, Dy: Single);
    procedure InViewRect(const Rect: TRectF);
    function ClientWidth: Single;
    function ClientHeight: Single;
    function GetTabList: ITabList; override;
    property ContentBounds: TRectF read GetContentBounds;
    procedure InvalidateContentSize;
    procedure RealignContent;

    property AutoHide: Boolean read FAutoHide write SetAutoHide default True;
    property DisableMouseWheel: Boolean read FDisableMouseWheel write FDisableMouseWheel default False;
    property ShowScrollBars: Boolean read FShowScrollBars write SetShowScrollBars default True;
    property ShowSizeGrip: Boolean read FShowSizeGrip write SetShowSizeGrip default False;
    property OnViewportPositionChange: TPositionChangeEvent read FOnViewportPositionChange write FOnViewportPositionChange;
    property OnHScrollChange: TNotifyEvent read FOnHScrollChange write FOnHScrollChange;
    property OnVScrollChange: TNotifyEvent read FOnVScrollChange write FOnVScrollChange;
    property OnCalcContentBounds: TOnCalcContentBoundsEvent read FOnCalcContentBounds write FOnCalcContentBounds;
  published
    property Align;
    property Anchors;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DragMode;
    property EnableDragHighlight;
    property Enabled;
    property Locked;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    { Events }
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    { Drag and Drop events }
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    { Mouse events }
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
  end;

{ TScrollBox }

  TScrollBox = class(TCustomScrollBox)
  protected
    procedure Paint; override;
  public
    property Content;
  published
    property Align;
    property Anchors;
    property AutoHide;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DisableMouseWheel;
    property DragMode;
    property Enabled;
    property EnableDragHighlight;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest;
    property Locked;
    property Margins;
    property Opacity;
    property Padding;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property ShowScrollBars;
    property ShowSizeGrip;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    { Events }
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    { Drag and Drop events }
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    { Mouse events }
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    { ScrollBox events }
    property OnViewportPositionChange;
    property OnHScrollChange;
    property OnVScrollChange;
    property OnCalcContentBounds;
  end;

{ TVertScrollBox }

  TVertScrollBox = class(TCustomScrollBox)
  protected
    function GetDefaultStyleLookupName: string; override;
    function DoCalcContentBounds: TRectF; override;
    procedure Paint; override;
    procedure DoUpdateAniCalculations(const AAniCalculations: TScrollCalculations); override;
  public
    property Content;
  published
    property Align;
    property Anchors;
    property AutoHide;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DisableMouseWheel;
    property DragMode;
    property Enabled;
    property EnableDragHighlight;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest;
    property Locked;
    property Margins;
    property Opacity;
    property Padding;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property ShowScrollBars;
    property ShowSizeGrip;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    { Events }
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    { Drag and Drop events }
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    { Mouse events }
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    { ScrollBox events }
    property OnViewportPositionChange;
    property OnVScrollChange;
    property OnCalcContentBounds;
  end;

{ THorzScrollBox }

  THorzScrollBox = class(TCustomScrollBox)
  protected
    function GetDefaultStyleLookupName: string; override;
    function DoCalcContentBounds: TRectF; override;
    procedure Paint; override;
    procedure DoUpdateAniCalculations(const AAniCalculations: TScrollCalculations); override;
  public
    property Content;
  published
    property Align;
    property Anchors;
    property AutoHide;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DisableMouseWheel;
    property DragMode;
    property Enabled;
    property EnableDragHighlight;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest;
    property Locked;
    property Margins;
    property Opacity;
    property Padding;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property ShowScrollBars;
    property ShowSizeGrip;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    { Events }
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    { Drag and Drop events }
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    { Mouse events }
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    { ScrollBox events }
    property OnViewportPositionChange;
    property OnHScrollChange;
    property OnCalcContentBounds;
  end;

{ TFramedScrollBox }

  TFramedScrollBox = class(TCustomScrollBox)
  protected
    function IsOpaque: Boolean; override;
  public
    property Content;
  published
    property Align;
    property Anchors;
    property AutoHide;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DisableMouseWheel;
    property DragMode;
    property Enabled;
    property EnableDragHighlight;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest;
    property Locked;
    property Margins;
    property Opacity;
    property Padding;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property ShowScrollBars;
    property ShowSizeGrip;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    { Events }
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    { Drag and Drop events }
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    { Mouse events }
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    { ScrollBox events }
    property OnViewportPositionChange;
    property OnHScrollChange;
    property OnVScrollChange;
    property OnCalcContentBounds;
  end;

{ TFramedVertScrollBox }

  TFramedVertScrollBox = class(TVertScrollBox)
  protected
    function IsOpaque: Boolean; override;
    function GetDefaultStyleLookupName: string; override;
  end;

{ TGridLayout }

  TGridLayout = class(TControl)
  private
    FItemWidth: Single;
    FItemHeight: Single;
    FOrientation: TOrientation;
    procedure SetItemHeight(const Value: Single);
    procedure SetItemWidth(const Value: Single);
    procedure SetOrientation(const Value: TOrientation);
  protected
    procedure DoRealign; override;
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    procedure Paint; override;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Align;
    property Anchors;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DragMode;
    property EnableDragHighlight;
    property Enabled;
    property Locked;
    property Height;
    property Hint;
    property HitTest;
    property ItemHeight: Single read FItemHeight write SetItemHeight;
    property ItemWidth: Single read FItemWidth write SetItemWidth;
    property Padding;
    property Opacity;
    property Orientation: TOrientation read FOrientation write SetOrientation;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property TabOrder;
    property TabStop;
    property ParentShowHint;
    property ShowHint;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnCanFocus;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

{ TGridPanelLayout }

  TGridPanelLayout = class(TControl)
  public type
    TSizeStyle = (Absolute, Percent, Auto, Weight);

    EGridLayoutException = class(Exception);

    TCellItem = class(TCollectionItem)
    private
      FSizeStyle: TSizeStyle;
      FValue: Double;
      FSize: Single;
      FAutoAdded: Boolean;
    protected
      procedure AssignTo(Dest: TPersistent); override;
      procedure SetSizeStyle(Value: TSizeStyle);
      procedure SetValue(Value: Double);
      property Size: Single read FSize write FSize;
      property AutoAdded: Boolean read FAutoAdded write FAutoAdded;
    public
      constructor Create(Collection: TCollection); override;
    published
      property SizeStyle: TSizeStyle read FSizeStyle write SetSizeStyle default TSizeStyle.Percent;
      property Value: Double read FValue write SetValue;
    end;

    TRowItem = class(TCellItem);

    TColumnItem = class(TCellItem);

    TCellCollection = class(TOwnedCollection)
    protected
      function GetAttrCount: Integer; override;
      function GetAttr(Index: Integer): string; override;
      function GetItemAttr(Index, ItemIndex: Integer): string; override;
      function GetItem(Index: Integer): TCellItem;
      procedure SetItem(Index: Integer; Value: TCellItem);
      procedure Update(Item: TCollectionItem); override;
    public
      function Owner: TGridPanelLayout;
      property Items[Index: Integer]: TCellItem read GetItem write SetItem; default;
    end;

    TCellSpan = 1..MaxInt;

    TRowCollection = class(TCellCollection)
    protected
      function GetItemAttr(Index, ItemIndex: Integer): string; override;
      procedure Notify(Item: TCollectionItem; Action: System.Classes.TCollectionNotification); override;
    public
      constructor Create(AOwner: TPersistent);
      function Add: TRowItem;
    end;

    TColumnCollection = class(TCellCollection)
    protected
      function GetItemAttr(Index, ItemIndex: Integer): string; override;
      procedure Notify(Item: TCollectionItem; Action: System.Classes.TCollectionNotification); override;
    public
      constructor Create(AOwner: TPersistent);
      function Add: TColumnItem;
    end;

    TControlItem = class(TCollectionItem)
    private
      [Weak] FControl: TControl;
      FColumn, FRow: Integer;
      FColumnSpan, FRowSpan: TCellSpan;
      FPushed: Integer;
      function GetGridPanelLayout: TGridPanelLayout;
      function GetPushed: Boolean;
      procedure SetColumn(Value: Integer);
      procedure SetColumnSpan(Value: TCellSpan);
      procedure SetControl(Value: TControl);
      procedure SetRow(Value: Integer);
      procedure SetRowSpan(Value: TCellSpan);
    protected
      procedure AssignTo(Dest: TPersistent); override;
      procedure InternalSetLocation(AColumn, ARow: Integer; APushed: Boolean; MoveExisting: Boolean);
      property GridPanelLayout: TGridPanelLayout read GetGridPanelLayout;
      property Pushed: Boolean read GetPushed;
    public
      constructor Create(Collection: TCollection); override;
      destructor Destroy; override;
      procedure SetLocation(AColumn, ARow: Integer; APushed: Boolean = False);
    published
      property Column: Integer read FColumn write SetColumn;
      property ColumnSpan: TCellSpan read FColumnSpan write SetColumnSpan default 1;
      property Control: TControl read FControl write SetControl;
      property Row: Integer read FRow write SetRow;
      property RowSpan: TCellSpan read FRowSpan write SetRowSpan default 1;
    end;

    TControlCollection = class(TOwnedCollection)
    protected
      function GetControl(AColumn, ARow: Integer): TControl;
      function GetControlItem(AColumn, ARow: Integer): TControlItem;
      function GetItem(Index: Integer): TControlItem;
      procedure SetControl(AColumn, ARow: Integer; Value: TControl);
      procedure SetItem(Index: Integer; Value: TControlItem);
      procedure Update(Item: TCollectionItem); override;
    public
      constructor Create(AOwner: TPersistent);
      function Add: TControlItem;
      procedure AddControl(AControl: TControl; AColumn: Integer = -1; ARow: Integer = -1);
      procedure RemoveControl(AControl: TControl);
      function IndexOf(AControl: TControl): Integer;
      function Owner: TGridPanelLayout;
      property Controls[AColumn, ARow: Integer]: TControl read GetControl write SetControl;
      property ControlItems[AColumn, ARow: Integer] : TControlItem read GetControlItem;
      property Items[Index: Integer]: TControlItem read GetItem write SetItem; default;
    end;

    TLayoutManager = class
    private type
      TCollectionInfo = record
        FlexibleSize: Single;
        WeightSum: Single;
        WeightCount: Integer;
        PercentageSum: Single;
        PercentageCount: Integer;
      end;
    private
      FOwner: TGridPanelLayout;
      function CalculateMaxWidth(const AColumn: Integer): Single;
      function CalculateMaxHeight(const ARow: Integer): Single;
      function CollectColumnsInfo(const AWidth: Single): TCollectionInfo;
      function CollectRowsInfo(const AHeight: Single): TCollectionInfo;
      procedure NormalizePercentages(const ACollection: TCellCollection; const AInfo: TCollectionInfo; const ABaseCell: TCellItem = nil);
      function ShouldNormalizePercentages(const ACollectionInfo: TCollectionInfo): Boolean;
      procedure RealignItems(const ACollection: TCellCollection; const AInfo: TCollectionInfo; const ABaseCell: TCellItem = nil);
    public
      constructor Create(const AOwner: TGridPanelLayout);
      procedure RecalcCellDimensions(const ARect: TRectF; const ABasedRow: TRowItem = nil; const ABasedColumn: TColumnItem = nil);
    end;

    TExpandStyle = (AddRows, AddColumns, FixedSize);

    TState = (NeedRecalculateCellSizes, RecalculatingCellSizes);
    TStates = set of TState;
  private
    FState: TStates;
    FExpandStyle: TExpandStyle;
    FRowCollection: TRowCollection;
    FColumnCollection: TColumnCollection;
    FControlCollection: TControlCollection;
    FLayoutManager: TLayoutManager;
    procedure SetColumnCollection(const Value: TColumnCollection);
    procedure SetControlCollection(const Value: TControlCollection);
    procedure SetRowCollection(const Value: TRowCollection);
    function GetCellCount: Integer;
    function GetCellSizes(AColumn, ARow: Integer): TPointF;
    function GetCellRect(AColumn, ARow: Integer): TRectF;
    function GetColumnSpanIndex(AColumn, ARow: Integer): Integer;
    function GetRowSpanIndex(AColumn, ARow: Integer): Integer;
    procedure NeedRecalculateCellSizes;
    procedure RecalcCellDimensions(const ABasedRow: TRowItem = nil; const ABasedColumn: TColumnItem = nil); overload;
    procedure RecalcCellDimensions(const ARect: TRectF; const ABasedRow: TRowItem = nil; const ABasedColumn: TColumnItem = nil); overload;
  protected
    procedure DoRealign; override;
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    procedure DoDeleteChildren; override;
    function AutoAddColumn: TColumnItem;
    function AutoAddRow: TRowItem;
    procedure RemoveEmptyAutoAddColumns;
    procedure RemoveEmptyAutoAddRows;
    function CellToCellIndex(AColumn, ARow: Integer): Integer;
    procedure CellIndexToCell(AIndex: Integer; var AColumn, ARow: Integer);
    procedure DoPaint; override;
    procedure Resize; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;

    function IsColumnEmpty(AColumn: Integer): Boolean;
    function IsRowEmpty(ARow: Integer): Boolean;
    procedure UpdateControlsColumn(AColumn: Integer);
    procedure UpdateControlsRow(ARow: Integer);
    property ColumnSpanIndex[AColumn, ARow: Integer]: Integer read GetColumnSpanIndex;
    property CellCount: Integer read GetCellCount;
    property CellSize[AColumn, ARow: Integer]: TPointF read GetCellSizes;
    property CellRect[AColumn, ARow: Integer]: TRectF read GetCellRect;
    property RowSpanIndex[AColumn, ARow: Integer]: Integer read GetRowSpanIndex;
  published
    property Align;
    property Anchors;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DragMode;
    property EnableDragHighlight;
    property Enabled;
    property Locked;
    property Height;
    property Hint;
    property HitTest;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property TabOrder;
    property TabStop;
    property ParentShowHint;
    property ShowHint;
    { Columns and rows }
    property ColumnCollection: TColumnCollection read FColumnCollection write SetColumnCollection;
    property ControlCollection: TControlCollection read FControlCollection write SetControlCollection;
    property ExpandStyle: TExpandStyle read FExpandStyle write FExpandStyle default TExpandStyle.AddRows;
    property RowCollection: TRowCollection read FRowCollection write SetRowCollection;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnCanFocus;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

  TFlowJustify = (Left, Right, Center, Justify);

  TFlowDirection = (LeftToRight, RightToLeft);

  TFlowLayoutRules = record
    Justify: TFlowJustify;
    JustifyLast: TFlowJustify;
    Direction: TFlowDirection;
    HorizontalGap: Single;
    VerticalGap: Single;
  end;

  TFlowLayoutBreak = class(TControl)
  private
    FRules: TFlowLayoutRules;
    FChangesRules: Boolean;
  protected
    procedure SetChangesRules(AChangesRules: Boolean);
    procedure Paint; override;
    function VisibleStored: Boolean; override;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property ChangesRules: Boolean read FChangesRules write SetChangesRules;
    property Justify: TFlowJustify read FRules.Justify write FRules.Justify;
    property JustifyLastLine: TFlowJustify read FRules.JustifyLast write FRules.JustifyLast;
    property FlowDirection: TFlowDirection read FRules.Direction write FRules.Direction;
    property HorizontalGap: Single read FRules.HorizontalGap write FRules.HorizontalGap;
    property VerticalGap: Single read FRules.VerticalGap write FRules.VerticalGap;
    property Visible;
  end;

  TFlowLayout = class(TControl, IContentObserver)
  private
    FRules: TFlowLayoutRules;
  protected
    procedure DoRealign; override;
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    procedure Paint; override;
    procedure SetJustify(AJustify: TFlowJustify);
    procedure SetJustifyLast(AJustify: TFlowJustify);
    procedure SetFlowDirection(ADirection: TFlowDirection);
    procedure SetHGap(AHGap: Single);
    procedure SetVGap(AVGap: Single);
    { IContentObserver }
    procedure IContentObserver.Changed = ContentChanged;
    procedure ContentChanged(const AChild: TFmxObject); virtual;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Align;
    property Anchors;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DragMode;
    property EnableDragHighlight;
    property Enabled;
    property Locked;
    property Height;
    property Hint;
    property HitTest;
    property Padding;
    property Opacity;
    property Margins;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property TabOrder;
    property TabStop;
    property Justify : TFlowJustify read FRules.Justify write SetJustify;
    property JustifyLastLine : TFlowJustify read FRules.JustifyLast write SetJustifyLast;
    property FlowDirection : TFlowDirection read FRules.Direction write SetFlowDirection;
    property HorizontalGap : Single read FRules.HorizontalGap write SetHGap;
    property VerticalGap : Single read FRules.VerticalGap write SetVGap;
    property ParentShowHint;
    property ShowHint;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Mouse events}
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
  end;

//== INTERFACE END: FMX.Layouts
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.ScrollBox (from FMX.ScrollBox.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


const
  MM_AUTOHIDE_CHANGED = MM_USER + 1;
  MM_BOUNCES_CHANGED = MM_USER + 2;
  MM_DISABLE_MOUSE_WHEEL_CHANGED = MM_USER + 3;
  MM_ENABLED_SCROLL_CHANGED = MM_USER + 4;
  MM_SCROLLBAR_VISIBLE_CHANGED = MM_USER + 5;
  MM_SHOW_SIZE_GRIP_CHANGED = MM_USER + 6;
  MM_SHOW_SCROLLBAR_CHANGED = MM_USER + 7;
  MM_GET_VIEWPORT_POSITION = MM_USER + 8;
  MM_SET_VIEWPORT_POSITION = MM_USER + 9;
  MM_GET_VIEWPORT_SIZE = MM_USER + 10;
  MM_SCROLL_ANIMATION_CHANGED = MM_USER + 11;
  MM_SCROLL_DIRECTIONS_CHANGED = MM_USER + 12;
  MM_SET_CONTENT_BOUNDS = MM_USER + 13;
  MM_TOUCH_TRACKING_CHANGED = MM_USER + 14;
  MM_SCROLLBOX_USER = MM_USER + 15;

  PM_SCROLL_BY = PM_USER + 1;
  PM_SCROLL_IN_RECT = PM_USER + 2;
  PM_SET_CONTENT = PM_USER + 3;
  PM_GET_CONTENT_LAYOUT = PM_USER + 4;
  PM_GET_VSCROLLBAR = PM_USER + 5;
  PM_GET_HSCROLLBAR = PM_USER + 6;
  PM_GET_ANICALCULATIONS = PM_USER + 7;
  PM_BEGIN_PAINT_CHILDREN = PM_USER + 8;
  PM_END_PAINT_CHILDREN = PM_USER + 9;
  PM_USER_SCROLLBOX = PM_USER + 10;

type

  { TScrollBox }

  TCustomPresentedScrollBox = class;

  /// <summary>Event type for notification about ScrollBox changed position of content</summary>
  TPositionChangeEvent = procedure (Sender: TObject; const OldViewportPosition, NewViewportPosition: TPointF;
    const ContentSizeChanged: Boolean) of object;
  /// <summary>Event type for correcting content size, which was calculated automatically.</summary>
  TOnCalcContentBoundsEvent = procedure (Sender: TObject; var ContentBounds: TRectF) of object;

  /// <summary>Stores the settings of scrolling behavior of ScrollBox's content.</summary>
  TScrollOptions = class(TPersistent)
  public const
    DefaultAutoHideScrollBars = TBehaviorBoolean.PlatformDefault;
    DefaultBounces = TBehaviorBoolean.PlatformDefault;
    DefaultEnabledScroll = True;
    DefaultShowScrollBars = True;
    DefaultScrollAnimation = TBehaviorBoolean.PlatformDefault;
    DefaultTouchTracking = TBehaviorBoolean.PlatformDefault;
  private
    FScrollBox: TCustomPresentedScrollBox;
    FAutoHideScrollBars: TBehaviorBoolean;
    FBounces: TBehaviorBoolean;
    FEnabledScroll: Boolean;
    FScrollAnimation: TBehaviorBoolean;
    FTouchTracking: TBehaviorBoolean;
    FOnInternalChange: TNotifyEvent;
    procedure SetAutoHideScrollBars(const Value: TBehaviorBoolean);
    procedure SetBounces(const Value: TBehaviorBoolean);
    procedure SetEnabledScroll(const Value: Boolean);
    procedure SetScrollAnimation(const Value: TBehaviorBoolean);
    procedure SetTouchTracking(const Value: TBehaviorBoolean);
  protected
    /// <summary>Notifies abount changes properties.</summary>
    procedure DoChanged; virtual;
    /// <summary>Copies the data to destination <c>TScrollContentSize</c>.</summary>
    procedure AssignTo(Dest: TPersistent); override;
    /// <summary>Returns option's owner.</summary>
    function GetOwner: TPersistent; override;
  public
    /// <summary>Constructs object, extract from <c>AOwner</c> TCustomScrollBox and sets internal event handler
    /// <c>OnChange</c></summary>
    constructor Create(AOwner: TComponent; const AOnChange: TNotifyEvent);
    /// <summary>Event, which is invoked, when size was changed</summary>
    property OnChange: TNotifyEvent read FOnInternalChange;
  published
    ///<summary>Defines that scrollbars are automatically hiding when scroll is done</summary>
    property AutoHideScrollBars: TBehaviorBoolean read FAutoHideScrollBars write SetAutoHideScrollBars default DefaultAutoHideScrollBars;
    ///<summary>Whether it is possible to scroll of content abroad</summary>
    property Bounces: TBehaviorBoolean read FBounces write SetBounces;
    ///<summary>Enable or disabled scroll</summary>
    property EnabledScroll: Boolean read FEnabledScroll write SetEnabledScroll;
    ///<summary>Enable or disabled scrolling animation</summary>
    property ScrollAnimation: TBehaviorBoolean read FScrollAnimation write SetScrollAnimation default DefaultScrollAnimation;
    ///<summary>Defines that control reacts on touch events</summary>
    property TouchTracking: TBehaviorBoolean read FTouchTracking write SetTouchTracking default DefaultTouchTracking;
  end;

  /// <summary>Stores the size of the ScrollBox content.</summary>
  TScrollContentSize = class(TPersistent)
  private
    [Weak] FScrollBox: TCustomPresentedScrollBox;
    FWidth: Single;
    FHeight: Single;
    FOnInternalChange: TNotifyEvent;
    procedure SetHeight(const Value: Single);
    procedure SetWidth(const Value: Single);
    function GetSize: TSizeF;
    procedure SetSize(const Value: TSizeF);
    function StoreWidthHeight: Boolean;
  protected
    /// <summary>Notifies abount changed size (Width, Height)</summary>
    procedure DoChanged; virtual;
    /// <summary>Copies the data to destination <c>TScrollContentSize</c></summary>
    procedure AssignTo(Dest: TPersistent); override;
    /// <summary>Returns owenr of the Data</summary>
    function GetOwner: TPersistent; override;
    /// <summary>Sets size without checks on <c>AutoCalculateContentSize</c>. Ignores <c>IsReadOnly</c></summary>
    procedure SetSizeWithoutChecks(const Value: TSizeF);
  public
    /// <summary>Constructs object, extract from <c>AOwner</c> TCustomScrollBox and sets internal event handler
    /// <c>OnChange</c></summary>
    constructor Create(AOwner: TComponent; const AOnChange: TNotifyEvent);
    /// <summary>Checks can we set size or not. It depends on <c>TPresentedScrollBox.AutoCalculateContentSize</c></summary>
    function IsReadOnly: Boolean;
    /// <summary>Link on Owner ScrollBox</summary>
    property ScrollBox: TCustomPresentedScrollBox read FScrollBox;
    /// <summary>Size of content</summary>
    property Size: TSizeF read GetSize write SetSize;
    /// <summary>Event, which is invoked, when size was changed</summary>
    property OnChange: TNotifyEvent read FOnInternalChange;
  published
    /// <summary>Width of content</summary>
    property Width: Single read FWidth write SetWidth stored StoreWidthHeight;
    /// <summary>Height of content</summary>
    property Height: Single read FHeight write SetHeight stored StoreWidthHeight;
  end;

  /// <summary>Directions of content scroll</summary>
  TScrollDirections = (Both, Horizontal, Vertical);

  /// <summary>Model of TScrollBox data.</summary>
  TCustomScrollBoxModel = class(TDataModel)
  public const
    DefaultAutoHide = TBehaviorBoolean.PlatformDefault;
    DefaultAutoCalculateContentSize = True;
    DefaultBounces = TBehaviorBoolean.PlatformDefault;
    DefaultEnabledScroll = True;
    DefaultShowScrollBars = True;
    DefaultScrollAnimation = TBehaviorBoolean.PlatformDefault;
    DefaultScrollDirections = TScrollDirections.Both;
    DefaultTouchTracking = TBehaviorBoolean.PlatformDefault;
  public type
    TScrollByInfo = record
      Vector: TPointF;
      Animated: Boolean;
    end;
    TInViewRectInfo = record
      Rect: TRectF;
      Animated: Boolean;
    end;
  private
    FAutoHide: TBehaviorBoolean;
    FAutoCalculateContentSize: Boolean;
    FBounces: TBehaviorBoolean;
    FContentSize: TScrollContentSize;
    FDisableMouseWheel: Boolean;
    FEnabledScroll: Boolean;
    FScrollAnimation: TBehaviorBoolean;
    FScrollDirections: TScrollDirections;
    FShowScrollBars: Boolean;
    FShowSizeGrip: Boolean;
    FViewportPosition: TPointF;
    FTouchTracking: TBehaviorBoolean;
    FOnCalcContentBounds: TOnCalcContentBoundsEvent;
    FOnViewportPositionChange:TPositionChangeEvent;
    procedure SetAutoHide(const Value: TBehaviorBoolean);
    procedure SetBounces(const Value: TBehaviorBoolean);
    procedure SetContentBounds(const Value: TRectF);
    function GetContentBounds: TRectF;
    procedure SetContentSize(const Value: TScrollContentSize);
    procedure SetDisableMouseWheel(const Value: Boolean);
    procedure SetEnabledScroll(const Value: Boolean);
    procedure SetScrollAnimation(const Value: TBehaviorBoolean);
    procedure SetScrollDirections(const Value: TScrollDirections);
    procedure SetShowScrollBars(const Value: Boolean);
    procedure SetShowSizeGrip(const Value: Boolean);
    procedure SetTouchTracking(const Value: TBehaviorBoolean);
    function GetViewportSize: TSizeF;
    procedure SetViewportPosition(const Value: TPointF);
    function GetViewportPosition: TPointF;
    procedure DoContentSizeChanged(Sender: TObject);
  public
    constructor Create(const AOwner: TComponent); override;
    destructor Destroy; override;
    ///<summary>Invoked, when ScrollBox changed content position or size</summary>
    procedure DoViewportPositionChange(const OldViewportPosition, NewViewportPosition: TPointF; const ContentSizeChanged: Boolean); virtual;
    /// <summary>Need ScrollBox updates effects, when content is scrolled? (False by default)</summary>
    function IsOpaque: Boolean;
    ///<summary>Returns current content bounds. If content bounds size is calculati</summary>
    property ContentBounds: TRectF read GetContentBounds write SetContentBounds;
    ///<summary>Defines that scrollbars are automatically hiding when scroll is done</summary>
    property AutoHide: TBehaviorBoolean read FAutoHide write SetAutoHide;
    ///<summary>Indicates that the size of scrolling content calculates automatically according to the size of
    ///components in content. Otherwise content size defines by the value of <c>ContentSize</c> property</summary>
    property AutoCalculateContentSize: Boolean read FAutoCalculateContentSize write FAutoCalculateContentSize;
    ///<summary>Whether it is possible to scroll of content abroad</summary>
    property Bounces: TBehaviorBoolean read FBounces write SetBounces;
    ///<summary>Current content size</summary>
    property ContentSize: TScrollContentSize read FContentSize write SetContentSize;
    ///<summary>Defines that control has no reaction on <c>MouseWheel</c> event</summary>
    property DisableMouseWheel: Boolean read FDisableMouseWheel write SetDisableMouseWheel;
    ///<summary>Enable or disabled scroll</summary>
    property EnabledScroll: Boolean read FEnabledScroll write SetEnabledScroll;
    ///<summary>Enable or disabled scrolling animation</summary>
    property ScrollAnimation: TBehaviorBoolean read FScrollAnimation write SetScrollAnimation;
    ///<summary>Defines avaiable scroll directions</summary>
    property ScrollDirections: TScrollDirections read FScrollDirections write SetScrollDirections;
    ///<summary>Defines scrollbars visibility</summary>
    property ShowScrollBars: Boolean read FShowScrollBars write SetShowScrollBars;
    ///<summary>Shows small control in the right-bottom corner that represent size changin control</summary>
    property ShowSizeGrip: Boolean read FShowSizeGrip write SetShowSizeGrip;
    ///<summary>Defines that control reacts on touch events</summary>
    property TouchTracking: TBehaviorBoolean read FTouchTracking write SetTouchTracking;
    ///<summary>Position of top-left point of view port at the ScrollBox's content. It is set in local coordinates of <c>Content</c></summary>
    property ViewportPosition: TPointF read GetViewportPosition write SetViewportPosition;
    ///<summary>Returns the size of displaing area</summary>
    property ViewportSize: TSizeF read GetViewportSize;
    ///<summary>Event that raises after control calculates its content size</summary>
    ///<remarks>Raises only when <c>AutoCalculateContentSize</c> is true</remarks>
    property OnCalcContentBounds: TOnCalcContentBoundsEvent read FOnCalcContentBounds write FOnCalcContentBounds;
    ///<summary>Raises when the value of ViewportPosition was changed</summary>
    property OnViewportPositionChange: TPositionChangeEvent read FOnViewportPositionChange write FOnViewportPositionChange;
  end;

  /// <summary>Container for the child controls of the scroll box.</summary>
  TScrollContent = class(TContent, IIgnoreControlPosition)
  private
    [Weak] FScrollBox: TCustomPresentedScrollBox;
    FOnGetClipRect: TOnCalcContentBoundsEvent;
  protected
    function GetClipRect: TRectF; override;
    function ObjectAtPoint(P: TPointF): IControl; override;
    function DoGetUpdateRect: TRectF; override;
    procedure DoAddObject(const AObject: TFmxObject); override;
    procedure DoInsertObject(Index: Integer; const AObject: TFmxObject); override;
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    procedure ContentChanged; override;
    { IIgnoreControlPosition }
    function GetIgnoreControlPosition: Boolean;
  public
    constructor Create(AOwner: TComponent); override;
    function PointInObjectLocal(X, Y: Single): Boolean; override;
  public
    ///<summary>Link to the ScrollBox that owns currect content instance</summary>
    property ScrollBox: TCustomPresentedScrollBox read FScrollBox;
    /// <summary> The handler for this event should return the clip rectangle </summary>
    property OnGetClipRect: TOnCalcContentBoundsEvent read FOnGetClipRect write FOnGetClipRect;
  end;

  ///<summary>Component allows view large content within a smaller visible area</summary>
  TCustomPresentedScrollBox = class(TPresentedControl)
  private
    FContent: TScrollContent;
    function GetModel: TCustomScrollBoxModel; overload;
    procedure SetAutoHide(const Value: TBehaviorBoolean);
    function GetAutoHide: TBehaviorBoolean;
    procedure SetBounces(const Value: TBehaviorBoolean);
    function GetBounces: TBehaviorBoolean;
    procedure SetCalculateContentSize(const Value: Boolean);
    function GetCalculateContentSize: Boolean;
    procedure SetContentBounds(const Value: TRectF);
    function GetContentBounds: TRectF;
    procedure SetContentSize(const Value: TScrollContentSize);
    function GetContentSize: TScrollContentSize;
    procedure SetDisableMouseWheel(const Value: Boolean);
    function GetDisableMouseWheel: Boolean;
    procedure SetEnabledScroll(const Value: Boolean);
    function GetEnabledScroll: Boolean;
    procedure SetScrollAnimation(const Value: TBehaviorBoolean);
    function GetScrollAnimation: TBehaviorBoolean;
    procedure SetScrollDirections(const Value: TScrollDirections);
    function GetScrollDirections: TScrollDirections;
    procedure SetShowScrollBars(const Value: Boolean);
    function GetShowScrollBars: Boolean;
    procedure SetShowSizeGrip(const Value: Boolean);
    function GetShowSizeGrip: Boolean;
    procedure SetTouchTracking(const Value: TBehaviorBoolean);
    function GetTouchTracking: TBehaviorBoolean;
    procedure SetViewportPosition(const Value: TPointF);
    function GetViewportPosition: TPointF;
    function GetViewportSize: TSizeF;
    procedure SetOnCalcContentBounds(const Value: TOnCalcContentBoundsEvent);
    function GetOnCalcContentBounds: TOnCalcContentBoundsEvent;
    procedure SetOnViewportPositionChange(const Value: TPositionChangeEvent);
    function GetOnViewportPositionChange: TPositionChangeEvent;
    { Streaming }
    procedure ReadSizeValue(AReader: TReader; var ASize: Single);
    procedure ReadViewportHeight(Reader: TReader);
    procedure ReadViewportWidth(Reader: TReader);
    procedure WriteViewportHeight(Writer: TWriter);
    procedure WriteViewportWidth(Writer: TWriter);
    function GetContentLayout: TControl;
    function GetHScrollBar: TScrollBar;
    function GetVScrollBar: TScrollBar;
    function GetAniCalculations: TAniCalculations;
  protected
    procedure Loaded; override;
    procedure PaddingChanged; override;
    { Structure }
    /// <summary>Create scroll content. Successors can override it for creating custom content. It allows add custom
    /// information to content.</summary>
    function CreateScrollContent: TScrollContent; virtual;
    /// <summary>Performs filtering of adding objects and redirects adding of object to <c>Content</c>, if AObject is not
    /// Effect, Animation or Style Object</summary>
    /// <remarks>It uses <c>IsObjectForContent</c> for defining content's object</remarks>
    procedure DoAddObject(const AObject: TFmxObject); override;
    /// <summary>Performs filtering of inserting objects and redirects inserting of object to <c>Content</c>, if AObject
    /// is not Effect, Animation or Style Object</summary>
    /// <remarks>It uses <c>IsObjectForContent</c> for defining content's object</remarks>
    procedure DoInsertObject(Index: Integer; const AObject: TFmxObject); override;
    /// <summary>Remove object from <c>Content</c> or <c>Children</c> list</summary>
    procedure DoRemoveObject(const AObject: TFmxObject); override;
    { Painting }
    procedure PaintChildren; override;
    { Content }
    /// <summary>Calculates content bounds by building convex shell of all children controls of <c>Content</c></summary>
    /// <remarks>If ScrollBox uses Horizontal or Vertical <c>ScrollDirections</c> mode, It restricts the content size by
    /// height or width</remarks>
    function DoCalcContentBounds: TRectF; virtual;                                                                                         
    /// <summary>Defines, need to add AObject to Content or not.</summary>
    function IsAddToContent(const AObject: TFmxObject): Boolean; virtual;
    /// <summary>Invoked, when new Object was added into Content's childrens list.</summary>
    procedure ContentAddObject(const AObject: TFmxObject); virtual;
    /// <summary>Invoked, when new Object was inserted into Content's childrens list.</summary>
    procedure ContentInsertObject(Index: Integer; const AObject: TFmxObject); virtual;
    /// <summary>Invoked before removing Object from Content's childrens list.</summary>
    procedure ContentBeforeRemoveObject(AObject: TFmxObject); virtual;
    /// <summary>Invoked, when Object was removed from Content's childrens list.</summary>
    procedure ContentRemoveObject(const AObject: TFmxObject); virtual;
    { Events }
    /// <summary>Need ScrollBox updates effects, when content is scrolled? (False by default)</summary>
    function IsOpaque: Boolean; virtual;
    /// <summary>Defines custom readers and writers for control properties for backward compatibility</summary>
    procedure DefineProperties(Filer: TFiler); override;
    ///<summary>Returns instance of class that provide scrolling physics calculations</summary>
    ///<remarks>Exists only for style presentation. For native presentation returns nil.</remarks>
    property AniCalculations: TAniCalculations read GetAniCalculations;
    { Design Time Only }
    /// <summary>Scrolls content in design time only</summary>
    procedure MouseWheel(Shift: TShiftState; WheelDelta: Integer; var Handled: Boolean); override;
  protected
    /// <summary>Defines a Model class (<c>TDataModelClass</c> by default) of <c>TScrollBox</c></summary>
    function DefineModelClass: TDataModelClass; override;
    /// <summary>Initializes presentation</summary>
    procedure InitPresentation(APresentation: TPresentationProxy); override;
  public
    constructor Create(AOwner: TComponent); override;
    ///<summary>Change scroll position by offset defined in <c>ADX</c> and <c>ADY</c></summary>
    procedure ScrollBy(const ADX, ADY: Single; const AAnimated: Boolean = True);
    ///<summary>Change scroll position to value defined in <c>AX</c> and <c>AY</c></summary>
    procedure ScrollTo(const AX, AY: Single; const AAnimated: Boolean = True);
    ///<summary>Change scroll position to the top</summary>
    procedure ScrollToTop(const AAnimated: Boolean = True);
    ///<summary>Change scroll position to the center of content size</summary>
    procedure ScrollToCenter(const AAnimated: Boolean = True);
    ///<summary>Scrolls content to rectange defined in <c>ARect</c></summary>
    procedure InViewRect(const ARect: TRectF; const AAnimated: Boolean = True);
    /// <summary>Sorts children of <c>Content</c></summary>
    procedure Sort(Compare: TFmxObjectSortCompare); override;
    /// <summary>Returns <c>TabList</c> of <c>Content</c></summary>
    function GetTabList: ITabList; override;
    { Update Content Size }
    /// <summary>Recalculates content bounds. If you use the manual calcualting of <c>ContentBounds</c>, you need to set
    /// through <c>ContentBounds</c></summary>
    /// <remarks>This method doesn't calculate content bounds, if we don't use mode of auto calculating
    /// (<c>AutoCalculateContentSize = False</c>) or control is being loaded or destroyed
    /// (ComponentState = csLoading or csDestroying)</remarks>
    procedure UpdateContentSize;
    ///<summary>Force content size calculation update</summary>
    procedure RealignContent;
    /// <summary>Content of ScrollBox. Contains controls placed into TScrollBox</summary>
    /// <remarks>Doesn't contain Style object, any kinds of Animation's and effect's objects</remarks>
    property Content: TScrollContent read FContent;
    /// <summary>Returns current content bounds</summary>
    property ContentBounds: TRectF read GetContentBounds write SetContentBounds;
    /// <summary>Removes all controls from content</summary>
    procedure ClearContent;
    /// <summary>Model of TScrollBox</summary>
    property Model: TCustomScrollBoxModel read GetModel;
    ///<summary>Position of view port of the ScrollBox's content. It is set in local coordinates of <c>Content</c></summary>
    property ViewportPosition: TPointF read GetViewportPosition write SetViewportPosition;
    /// <summary>Size of view port of the ScrollBox's content.</summary>
    property ViewportSize: TSizeF read GetViewportSize;
    { Deprecated }
    ///<summary>Returns vertical scrollbar component</summary>
    ///<remarks>Available only for styled presentation. For native presentation returns <c>nil</c></remarks>
    property VScrollBar: TScrollBar read GetVScrollBar;
    ///<summary>Returns horisontal scrollbar component</summary>
    ///<remarks>Available only for styled presentation. For native presentation returns <c>nil</c></remarks>
    property HScrollBar: TScrollBar read GetHScrollBar;
    ///<summary>Returns control from style that is a surface for content in the scrollbox</summary>
    property ContentLayout: TControl read GetContentLayout;
  public
    ///<summary>Indicates that the size of scrolling content calculates automatically according to the size of
    ///components in content. Otherwise content size defines by the value of <c>ContentSize</c> property</summary>
    property AutoCalculateContentSize: Boolean read GetCalculateContentSize write SetCalculateContentSize default True;
    ///<summary>Defines that scrollbars are automatically hiding when scroll is done</summary>
    property AutoHide: TBehaviorBoolean read GetAutoHide write SetAutoHide default TBehaviorBoolean.PlatformDefault;
    ///<summary>Whether it is possible to scroll of content abroad</summary>
    property Bounces: TBehaviorBoolean read GetBounces write SetBounces default TBehaviorBoolean.PlatformDefault;
    ///<summary>Current content size</summary>
    property ContentSize: TScrollContentSize read GetContentSize write SetContentSize;
    ///<summary>Defines that control has no reaction on <c>MouseWheel</c> event</summary>
    property DisableMouseWheel: Boolean read GetDisableMouseWheel write SetDisableMouseWheel default False;
    ///<summary>Enable or disabled scroll</summary>
    property EnabledScroll: Boolean read GetEnabledScroll write SetEnabledScroll default True;
    ///<summary>Enable or disabled scrolling animation</summary>
    property ScrollAnimation: TBehaviorBoolean read GetScrollAnimation write SetScrollAnimation default TBehaviorBoolean.PlatformDefault;
    ///<summary>Defines avaiable scroll directions</summary>
    property ScrollDirections: TScrollDirections read GetScrollDirections write SetScrollDirections default TScrollDirections.Both;
    ///<summary>Defines scrollbars visibility</summary>
    property ShowScrollBars: Boolean read GetShowScrollBars write SetShowScrollBars default True;
    ///<summary>Shows small control in the right-bottom corner that represent size changin control</summary>
    property ShowSizeGrip: Boolean read GetShowSizeGrip write SetShowSizeGrip default False;
    ///<summary>Defines that control reacts on touch events</summary>
    property TouchTracking: TBehaviorBoolean read GetTouchTracking write SetTouchTracking default TBehaviorBoolean.PlatformDefault;
    ///<summary>Event that raises after control calculates its content size</summary>
    ///<remarks>Raises only when <c>AutoCalculateContentSize</c> is true</remarks>
    property OnCalcContentBounds: TOnCalcContentBoundsEvent read GetOnCalcContentBounds write SetOnCalcContentBounds;
    ///<summary>Raises when the value of ViewportPosition was changed</summary>
    property OnViewportPositionChange: TPositionChangeEvent read GetOnViewportPositionChange write SetOnViewportPositionChange;
  end;

  /// <summary>A base scrollbox component available at design time.</summary>
  TPresentedScrollBox = class(TCustomPresentedScrollBox)
  published
    property AutoCalculateContentSize;
    property AutoHide;
    property Bounces;
    property ContentSize;
    property ControlType;
    property DisableMouseWheel;
    property EnabledScroll;
    property ScrollAnimation;
    property ScrollDirections;
    property ShowScrollBars;
    property ShowSizeGrip;
    property TouchTracking;
    property OnViewportPositionChange;
    property OnCalcContentBounds;
    { Inherited }
    property Align;
    property Anchors;
    property ClipChildren default True;
    property ClipParent;
    property Cursor;
    property DragMode;
    property Enabled;
    property EnableDragHighlight;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest;
    property Locked;
    property Margins;
    property Opacity;
    property Padding;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    { Events }
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
  end;

{ TVertScrollBox }

  /// <summary>Scrollbox with vertical scroll support only.</summary>
  TCustomPresentedVertScrollBox = class(TCustomPresentedScrollBox)
  protected
    function GetDefaultStyleLookupName: string; override;
  public
    constructor Create(AOwner: TComponent); override;
  end;

  /// <summary>Scrollbox without border, with vertical scroll only.</summary>
  TPresentedVertScrollBox = class(TCustomPresentedVertScrollBox)
  published
    property AutoCalculateContentSize;
    property AutoHide;
    property Bounces;
    property ContentSize;
    property ControlType;
    property DisableMouseWheel;
    property EnabledScroll;
    property ScrollDirections default TScrollDirections.Vertical;
    property ShowScrollBars;
    property ShowSizeGrip;
    property OnViewportPositionChange;
    property OnCalcContentBounds;
    { inhertied }
    property Align;
    property Anchors;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DragMode;
    property Enabled;
    property EnableDragHighlight;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest;
    property Locked;
    property Margins;
    property Opacity;
    property Padding;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    { Events }
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
  end;

{ THorzScrollBox }

  /// <summary>Scrollbox with horizontal scroll support only.</summary>
  TCustomPresentedHorzScrollBox = class(TCustomPresentedScrollBox)
  protected
    function GetDefaultStyleLookupName: string; override;
  public
    constructor Create(AOwner: TComponent); override;
  end;

  /// <summary>Scrollbox without border, with horizontal scroll only</summary>
  TPresentedHorzScrollBox = class(TCustomPresentedHorzScrollBox)
  published
    property AutoCalculateContentSize;
    property AutoHide;
    property Bounces;
    property ContentSize;
    property ControlType;
    property DisableMouseWheel;
    property EnabledScroll;
    property ScrollDirections default TScrollDirections.Horizontal;
    property ShowScrollBars;
    property ShowSizeGrip;
    property OnViewportPositionChange;
    property OnCalcContentBounds;
    { inhertied }
    property Align;
    property Anchors;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DragMode;
    property Enabled;
    property EnableDragHighlight;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest;
    property Locked;
    property Margins;
    property Opacity;
    property Padding;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    { Events }
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
  end;

{ TFramedScrollBox }

  /// <summary>Scrollbox without border.</summary>
  TCustomPresentedFramedScrollBox = class(TCustomPresentedScrollBox)
  protected
    function IsOpaque: Boolean; override;
  end;

  /// <summary>Desing-time scrollbox without border.</summary>
  TPresentedFramedScrollBox = class(TCustomPresentedFramedScrollBox)
  published
    property AutoCalculateContentSize;
    property AutoHide;
    property Bounces;
    property ContentSize;
    property ControlType;
    property DisableMouseWheel;
    property EnabledScroll;
    property ScrollDirections;
    property ShowScrollBars;
    property ShowSizeGrip;
    property OnViewportPositionChange;
    property OnCalcContentBounds;
    { inhertied }
    property Align;
    property Anchors;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DragMode;
    property Enabled;
    property EnableDragHighlight;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest;
    property Locked;
    property Margins;
    property Opacity;
    property Padding;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    { Events }
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
  end;

{ TFramedVertScrollBox }

  /// <summary>Design-time scrollbox that only supports vertical scrolling.</summary>
  TCustomPresentedFramedVertScrollBox = class(TCustomPresentedVertScrollBox)
  protected
    function IsOpaque: Boolean; override;
    function GetDefaultStyleLookupName: string; override;
  end;

  /// <summary>Scrollbox with vertical scroll only.</summary>
  TPresentedFramedVertScrollBox = class(TCustomPresentedFramedVertScrollBox)
  published
    property AutoCalculateContentSize;
    property AutoHide;
    property Bounces;
    property ContentSize;
    property ControlType;
    property DisableMouseWheel;
    property EnabledScroll;
    property ScrollDirections default TScrollDirections.Vertical;
    property ShowScrollBars;
    property ShowSizeGrip;
    property OnViewportPositionChange;
    property OnCalcContentBounds;
    { inhertied }
    property Align;
    property Anchors;
    property ClipChildren;
    property ClipParent;
    property Cursor;
    property DragMode;
    property Enabled;
    property EnableDragHighlight;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest;
    property Locked;
    property Margins;
    property Opacity;
    property Padding;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    { Events }
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
  end;

/// <summary>Normalizes the target rectangle AContentRect.</summary>
function NormalizeInViewRect(const AContentRect: TRectF; const AViewportSize: TSizeF; const AWishedViewPortRect: TRectF): TRectF;

//== INTERFACE END: FMX.ScrollBox
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.ListView.Adapters.Base (from FMX.ListView.Adapters.Base.pas)
//==================================================================================================


type
  TAbstractListViewAdapter = class abstract (TInterfacedPersistent)
  strict private
    FUpdatingCount: Integer;
    FOnChanged: TNotifyEvent;
    FOnItemsMayChange: TNotifyEvent;
    FOnItemsCouldHaveChanged: TNotifyEvent;
    FOnItemsInvalidate: TNotifyEvent;
    FOnItemsResize: TNotifyEvent;
    FOnResetView: TNotifyEvent;
  strict protected
    procedure CreateNewViews;
    procedure DoCreateNewViews; virtual;

    procedure ResetViews(const APurposes: TListItemPurposes);
    procedure DoResetViews(const APurposes: TListItemPurposes); virtual;

    procedure ResetView(const Item: TListItem);
    procedure DoResetView(const Item: TListItem); virtual;
    procedure DoSort(AComparer: IComparer<TListItem>); virtual;

    procedure SetOnChanged(const Value: TNotifyEvent);
    procedure SetOnItemsMayChange(const Value: TNotifyEvent);
    procedure SetOnItemsCouldHaveChanged(const Value: TNotifyEvent);
    procedure SetOnItemsInvalidate(const Value: TNotifyEvent);
    procedure SetOnItemsResize(const Value: TNotifyEvent);
    procedure SetOnResetView(const Value: TNotifyEvent);
    /// <summary>It's invoked when updating process is finished.</summary>
    procedure DoEndUpdate; virtual;
  public
    procedure Changed; virtual;
    procedure ItemsMayChange;
    procedure ItemsCouldHaveChanged;
    procedure ItemsInvalidate;
    procedure ItemsResize;
    procedure BeginUpdate;
    procedure EndUpdate;
    function IsUpdating: Boolean;
    procedure Sort(AComparer: IComparer<TListItem>);
    property OnChanged: TNotifyEvent write SetOnChanged;
    property OnItemsMayChange: TNotifyEvent write SetOnItemsMayChange;
    property OnItemsCouldHaveChanged: TNotifyEvent write SetOnItemsCouldHaveChanged;
    /// notify the view that repaint is necessary
    property OnItemsInvalidate: TNotifyEvent write SetOnItemsInvalidate;
    /// notify the view that the sizes of items need recalculation
    property OnItemsResize: TNotifyEvent write SetOnItemsResize;
    property OnResetView: TNotifyEvent write SetOnResetView;
  end;

  /// <summary>Minimal concrete implementation of IListViewAdapter</summary>
  TListViewItems = class(TAbstractListViewAdapter, IListViewAdapter)
  public type
    TOrder = (FirstToLast, LastToFirst);
  strict private
    FActiveItems: TListItemsList;
    FOnNotify: TCollectionNotifyEvent<TListItem>;

    { IListViewAdapter }
    function GetDefaultViewHeight: Integer;
  strict protected
    function GetCount: Integer; virtual;
    function GetItem(const Index: Integer): TListItem; virtual;
    procedure ResetIndexes;
    procedure ObjectsNotify(Sender: TObject; const Item: TListItem; Action: TCollectionNotification);
    property ActiveItems: TListItemsList read FActiveItems write FActiveItems;
    procedure DoSort(AComparer: IComparer<TListItem>); override;
  public
    constructor Create;
    destructor Destroy; override;
    /// <summary>Return index of AItem</summary>
    function IndexOf(const AItem: TListItem): Integer;
    /// <summary>Return TEnumerator&lt;TListItem&gt; of items in this adapter</summary>
    function GetEnumerator: TEnumerator<TListItem>;
    /// <summary>Access TListItem by Index</summary>
    property Item[const Index: Integer]: TListItem read GetItem; default;
    /// <summary>Count of items</summary>
    property Count: Integer read GetCount;
    /// <summary>Collection notify event, used internally</summary>
    property OnNotify: TCollectionNotifyEvent<TListItem> read FOnNotify write FOnNotify;
  end;

  /// <summary>Implementation of IListViewAdapter and IListViewFilterable</summary>
  TFilterableListViewItems = class(TListViewItems, IListViewFilterable)
  strict private
    FUnfilteredItems: TListItemsList;
    FFilteredItems: TListItemsList;
    FFilterPredicate: TFilterPredicate;
    FNeedApplyFilter: Boolean;
    FIsFiltering: Boolean;

    procedure ItemsCleared;
    procedure ItemDeleted(const Index: Integer);
    procedure ItemAdded(const Index: Integer; const Item: TListItem);
    { IListViewFilterable }
    function GetFilterPredicate: TFilterPredicate;
    function GetUnfilteredItems: TListItemsList;
    procedure SetFilterPredicate(const Value: TFilterPredicate);
    function GetFiltered: Boolean;
  strict protected
    /// <summary>Return True if item should be shown</summary>
    function DoFilterItem(const Item: TListItem): Boolean; virtual; abstract;
    /// <summary>Return unfiltered items. FFilteredItems by default.</summary>
    function DoGetUnfilteredItems: TListItemsList; virtual;
    procedure DoEndUpdate; override;
  public
    constructor Create;
    destructor Destroy; override;
    procedure Changed; override;
    /// <summary>Filters items if the adapter is not in the process of batch updating data.</summary>
    procedure ApplyFilter;
    /// <summary>Filter predicate</summary>
    property Filter: TFilterPredicate read GetFilterPredicate write SetFilterPredicate;
    /// <summary>A complete list of all items, regardless of state of Filtered</summary>
    property UnfilteredItems: TListItemsList read GetUnfilteredItems;
    ///<summary>Filtered is True if some items are not displayed</summary>
    property Filtered: Boolean read GetFiltered;
  end;

//== INTERFACE END: FMX.ListView.Adapters.Base
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.SearchBox (from FMX.SearchBox.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type

  /// <summary>Type of event handler for filtering of string value. If value is filtered by the filter condition,
  /// <c>Accept</c> should be True, Otherwise - false</summary>
  TFilterEvent = procedure (Sender: TObject; const AFilter: string; const AValue: string; var Accept: Boolean) of object;

{ TSearchBox }

  TSearchBoxModel = class(TCustomEditModel)
  private
    [Weak] FSearchResponder: ISearchResponder;
    FOnFilter: TFilterEvent;
  protected
    procedure DoChangeTracking; override;
  public
    property SearchResponder: ISearchResponder read FSearchResponder write FSearchResponder;
    /// <summary>Event handler for setting custom filter on text of <c>TSearchBox</c>.</summary>
    property OnFilter: TFilterEvent read FOnFilter write FOnFilter;
  end;

  TSearchBox = class(TEdit, IListBoxHeaderTrait)
  private
    function GetOnFilter: TFilterEvent;
    procedure SetOnFilter(const Value: TFilterEvent);
    function GetModel: TSearchBoxModel; overload;
  protected
    function DefinePresentationName: string; override;
    function DefineModelClass: TDataModelClass; override;
    procedure ParentChanged; override;
  public
    constructor Create(AOwner: TComponent); override;
    property Model: TSearchBoxModel read GetModel;
  published
    /// <summary>Event handler for setting custom filter on text of <c>TSearchBox</c>.</summary>
    property OnFilter: TFilterEvent read GetOnFilter write SetOnFilter;
  end;

//== INTERFACE END: FMX.SearchBox
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.Memo (from FMX.Memo.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


const
  MM_MEMO_CARETCHANGED = MM_SCROLLBOX_USER + 1;
  MM_MEMO_READONLY_CHANGED = MM_SCROLLBOX_USER + 2;
  MM_MEMO_CHECKSPELLING_CHANGED = MM_SCROLLBOX_USER + 3;
  MM_MEMO_IMEMODE_CHANGED = MM_SCROLLBOX_USER + 4;
  MM_MEMO_KEYBOARDTYPE_CHANGED = MM_SCROLLBOX_USER + 5;
  MM_MEMO_TEXT_SETTINGS_CHANGED = MM_SCROLLBOX_USER + 6;
  MM_MEMO_AUTOSELECT_CHANGED = MM_SCROLLBOX_USER + 7;
  MM_MEMO_CHARCASE_CHANGED = MM_SCROLLBOX_USER + 8;
  MM_MEMO_HIDESELECTIONONEXIT_CHANGED = MM_SCROLLBOX_USER + 9;
  MM_MEMO_MAXLENGTH_CHANGED = MM_SCROLLBOX_USER + 10;
  MM_MEMO_LINES_CHANGED = MM_SCROLLBOX_USER + 11;
  MM_MEMO_TEXT_CHANGING = MM_SCROLLBOX_USER + 12;
  MM_MEMO_GET_CARET_POSITION = MM_SCROLLBOX_USER + 13;
  MM_MEMO_SET_CARET_POSITION = MM_SCROLLBOX_USER + 14;
  MM_MEMO_SELSTART_CHANGED = MM_SCROLLBOX_USER + 15;
  MM_MEMO_SELLENGTH_CHANGED = MM_SCROLLBOX_USER + 16;
  MM_MEMO_DATADETECTORTYPES_CHANGED = MM_SCROLLBOX_USER + 17;
  MM_MEMO_LINES_INSERT_LINE = MM_SCROLLBOX_USER + 18;
  MM_MEMO_LINES_PUT_LINE = MM_SCROLLBOX_USER + 19;
  MM_MEMO_LINES_DELETE_LINE = MM_SCROLLBOX_USER + 20;
  MM_MEMO_LINES_EXCHANGE_LINES = MM_SCROLLBOX_USER + 21;
  MM_MEMO_LINES_CLEAR = MM_SCROLLBOX_USER + 22;
  MM_MEMO_UPDATE_STATE_CHANGED = MM_SCROLLBOX_USER + 23;
  MM_MEMO_CAN_SET_FOCUS = MM_SCROLLBOX_USER + 31;
  MM_MEMO_GET_CARET_POSITION_BY_POINT = MM_SCROLLBOX_USER + 32;
  MM_MEMO_USER = MM_SCROLLBOX_USER + 33;

  PM_MEMO_GOTO_LINE_BEGIN = PM_USER_SCROLLBOX + 1;
  PM_MEMO_GOTO_LINE_END = PM_USER_SCROLLBOX + 2;
  PM_MEMO_GOTO_TEXT_BEGIN = PM_USER_SCROLLBOX + 3 deprecated;
  PM_MEMO_GOTO_TEXT_END = PM_USER_SCROLLBOX + 4 deprecated;
  PM_MEMO_UNDO_MANAGER_INSERT_TEXT = PM_USER_SCROLLBOX + 5;
  PM_MEMO_UNDO_MANAGER_DELETE_TEXT = PM_USER_SCROLLBOX + 6;
  PM_MEMO_UNDO_MANAGER_UNDO = PM_USER_SCROLLBOX + 7;
  PM_MEMO_SELECT_TEXT = PM_USER_SCROLLBOX + 8;
  PM_MEMO_USER = PM_USER_SCROLLBOX + 9;

type

  { TMemo }

  TDataDetectorType = (PhoneNumber, Link, Address, CalendarEvent);
  TDataDetectorTypes = set of TDataDetectorType;

  /// <summary>Data model for the TMemo control.</summary>
  TCustomMemoModel = class(TCustomScrollBoxModel, ITextLinesSource)
  public type
    ///<summary>Record to notify presenter about changes in test lines.</summary>
    TLineInfo = record
      Index: Integer;
      Text: string;
      ExtraIndex: Integer;
      class function Create(const Index: Integer; const Text: string): TLineInfo; overload; static; inline;
      class function Create(const Index, ExtraIndex: Integer): TLineInfo; overload; static; inline;
    end;
    /// <summary>Data for requesting caret position by HitTest point.</summary>
    TGetCaretPositionInfo = record
      HitPoint: TPointF;
      RoundToWord: Boolean;
      CaretPosition: TCaretPosition;
    end;
  public const
    DefaultAutoSelect = False;
    DefaultCharCase = TEditCharCase.ecNormal;
    DefaultHideSelectionOnExit = True;
    DefaultKeyboardType = TVirtualKeyboardType.Default;
    DefaultMaxLength = 0;
    DefaultReadOnly = False;
    DefaultSelectionColor = $802A8ADF;
  private
    FAutoSelect: Boolean;
    FCaret: TCaret;
    FChanged: Boolean;
    FCharCase: TEditCharCase;
    FCheckSpelling: Boolean;
    FDataDetectorTypes: TDataDetectorTypes;
    FHideSelectionOnExit: Boolean;
    FImeMode: TImeMode;
    FKeyboardType: TVirtualKeyboardType;
    FLines: TStrings;
    FMaxLength: Integer;
    FReadOnly: Boolean;
    FSelectionFill: TBrush;
    FSelStart: Integer;
    FSelLength: Integer;
    FTextSettingsInfo: TTextSettingsInfo;
    FOnChange: TNotifyEvent;
    FOnChangeTracking: TNotifyEvent;
    FOnValidating: TValidateTextEvent;
    FOnValidate: TValidateTextEvent;
    procedure SetCaret(const Value: TCaret);
    procedure SetCheckSpelling(const Value: Boolean);
    procedure SetReadOnly(const Value: Boolean);
    procedure SetImeMode(const Value: TImeMode);
    procedure SetKeyboardType(const Value: TVirtualKeyboardType);
    procedure SetAutoSelect(const Value: Boolean);
    procedure SetCharCase(const Value: TEditCharCase);
    procedure SetHideSelectionOnExit(const Value: Boolean);
    procedure SetMaxLength(const Value: Integer);
    procedure SetLines(const Value: TStrings);
    procedure SetSelectionFill(const Value: TBrush);
    procedure SetSelLength(const Value: Integer);
    procedure SetSelStart(const Value: Integer);
    procedure SetTextSettingsInfo(const Value: TTextSettingsInfo);
    procedure SetDataDetectorTypes(const Value: TDataDetectorTypes);
    function GetCaretPosition: TCaretPosition;
    procedure SetCaretPosition(const Value: TCaretPosition);
    function CanSetFocus: Boolean;
    { ITextLinesSource }
    function GetLine(const ALineIndex: Integer): string;
    function GetLineBreak: string;
    function GetCount: Integer;
    function GetText: string;
  protected
    ///<summary>Validate inputing text. Calling before OnChangeTracking</summary>
    function DoValidating(const Value: string): string; virtual;
    ///<summary>Validate inputed text. Calling before OnChange</summary>
    function DoValidate(const Value: string): string; virtual;
    ///<summary>Call OnChangeTracking event</summary>
    procedure DoChangeTracking; virtual;
    ///<summary>Call OnChange event</summary>
    procedure DoChange; virtual;
    ///<summary>Method is calling when some parameter of text settings was changed</summary>
    procedure TextSettingsChanged; virtual;
    ///<summary>Returns class type that represent used text settings. Could be overridden  in descendants to modify
    ///default behavior</summary>
    function GetTextSettingsClass: TTextSettingsInfo.TCustomTextSettingsClass; virtual;
  public
    constructor Create(const AOwner: TComponent); override;
    destructor Destroy; override;
    ///<summary>Does memo has selected text</summary>
    function HasSelection: Boolean;
    ///<summary>Returns current selected text</summary>
    function SelectedText: string;
    ///<summary>If there were made any changes in text OnChange will be raised</summary>
    procedure Change;
    ///<summary>Convert absolute platform-dependent position in text to platform independent value in format
    ///(line_number, position_in_line)</summary>
    function TextPosToPos(const APos: Integer): TCaretPosition;
    ///<summary>Convert platform-independent position to absolute platform-dependent position</summary>
    function PosToTextPos(const APostion: TCaretPosition): Integer;
    ///<summary>Insert text in memo after defined position</summary>
    procedure InsertAfter(const APosition: TCaretPosition; const AFragment: string; const Options: TInsertOptions);
    ///<summary>Delete fragment of the text from the memo after defined position</summary>
    procedure DeleteFrom(const APosition: TCaretPosition; const ALength: Integer; const Options: TDeleteOptions);
    /// <summary>Replace fragment of text from the memo in the specifeid range.</summary>
    procedure Replace(const APosition: TCaretPosition; const ALength: Integer; const AFragment: string);
    ///<summary>Select <c>ALength</c> characters in memo's text starting from <c>AStartPosition</c></summary>
    procedure SelectText(const AStartPosition: TCaretPosition; const ALength: Integer);

    function GetNextWordBegin(const APosition: TCaretPosition): TCaretPosition;
    function GetPrevWordBegin(const APosition: TCaretPosition): TCaretPosition;
    function GetPositionShift(const APosition: TCaretPosition; const ADelta: Integer): TCaretPosition;
    { Caret position }
    procedure MoveCaretHorizontal(const ADelta: Integer);
    procedure MoveCaretLeft;
    procedure MoveCaretRight;
    /// <summary>Returns caret position by specified hittest point.</summary>
    /// <remarks>Works only for <c>TMemo.ControlType=Styled</c>.</remarks>
    function GetCaretPositionByPoint(const AHitPoint: TPointF; const ARoundToWord: Boolean = False): TCaretPosition;
  public
    ///<summary>Select all text when control getting focus</summary>
    property AutoSelect: Boolean read FAutoSelect write SetAutoSelect;
    ///<summary>Contains component that represent current caret for control</summary>
    property Caret: TCaret read FCaret write SetCaret;
    ///<summary>Defines character case for text in component</summary>
    property CharCase: TEditCharCase read FCharCase write SetCharCase;
    ///<summary>Switch on/off spell checking feature</summary>
    property CheckSpelling: Boolean read FCheckSpelling write SetCheckSpelling;
    ///<summary>Defines the types of information that can be detected in text
    ///(for native presentation on iOS only)</summary>
    property DataDetectorTypes: TDataDetectorTypes read FDataDetectorTypes write SetDataDetectorTypes;
    ///<summary>Do not draw selected text region when component not in focus</summary>
    property HideSelectionOnExit: Boolean read FHideSelectionOnExit write SetHideSelectionOnExit default True;
    ///<summary>Text is in read-only mode</summary>
    property ReadOnly: Boolean read FReadOnly write SetReadOnly;
    ///<summary>Default IME text input mode</summary>
    property ImeMode: TImeMode read FImeMode write SetImeMode;
    ///<summary>Defines visual type of on-screen-keyboard</summary>
    property KeyboardType: TVirtualKeyboardType read FKeyboardType write SetKeyboardType;
    ///<summary>Lines of text</summary>
    property Lines: TStrings read FLines write SetLines;
    ///<summary>Available maximum length of text (0 - no length limitation).</summary>
    property MaxLength: Integer read FMaxLength write SetMaxLength;
    ///<summary>Brush that is using to draw text selection region</summary>
    property SelectionFill: TBrush read FSelectionFill write SetSelectionFill;
    ///<summary>Current position of cursor in the text</summary>
    property CaretPosition: TCaretPosition read GetCaretPosition write SetCaretPosition;
    ///<summary>Text selection starting position</summary>
    property SelStart: Integer read FSelStart write SetSelStart;
    ///<summary>Length of selected text</summary>
    property SelLength: Integer read FSelLength write SetSelLength;
    ///<summary>Container for current text visualization attributes</summary>
    property TextSettingsInfo: TTextSettingsInfo read FTextSettingsInfo write SetTextSettingsInfo;
    ///<summary>Event that raises when control losing focus or user pressing ENTER key (but onlt if some changes were
    ///made)</summary>
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    ///<summary>Event that raises on any change in text</summary>
    property OnChangeTracking: TNotifyEvent read FOnChangeTracking write FOnChangeTracking;
    ///<summary>Event that raises to validate any change in text (raises before OnChangeTracking event)</summary>
    property OnValidating: TValidateTextEvent read FOnValidating write FOnValidating;
    ///<summary>Event that raises to validate changes in text (raises before OnChange event)</summary>
    property OnValidate: TValidateTextEvent read FOnValidate write FOnValidate;
  end;

  /// <summary>TCustomMemo is the base class from which all FireMonkey multiline
  /// text editing controls, providing text scrolling, are derived.</summary>
  TCustomMemo = class(TCustomPresentedScrollBox, ITextSettings, ITextActions, IVirtualKeyboardControl, ICaret,
    IReadOnly)
  private
    FSaveReadOnly: Boolean;
    procedure ReadTextData(Reader: TReader);
    procedure ReadHideSelectionData(Reader: TReader);
    function GetModel: TCustomMemoModel; overload;
    function GetLines: TStrings;
    procedure SetLines(const Value: TStrings);
    function GetCheckSpelling: Boolean;
    procedure SetCheckSpelling(const Value: Boolean);
    function GetAutoSelect: Boolean;
    procedure SetAutoSelect(const Value: Boolean);
    function GetCaret: TCaret;
    procedure SetCaret(const Value: TCaret);
    function GetCharCase: TEditCharCase;
    procedure SetCharCase(const Value: TEditCharCase);
    function GetHideSelectionOnExit: Boolean;
    procedure SetHideSelectionOnExit(const Value: Boolean);
    function GetMaxLength: Integer;
    procedure SetMaxLength(const Value: Integer);
    function GetImeMode: TImeMode;
    procedure SetImeMode(const Value: TImeMode);
    function GetSelLength: Integer;
    procedure SetSelLength(const Value: Integer);
    function GetSelStart: Integer;
    procedure SetSelStart(const Value: Integer);
    function GetDataDetectorTypes: TDataDetectorTypes;
    procedure SetDataDetectorTypes(const Value: TDataDetectorTypes);
    function GetText: string;
    procedure SetText(const Value: string);
    function GetOnChange: TNotifyEvent;
    procedure SetOnChange(const Value: TNotifyEvent);
    function GetOnChangeTracking: TNotifyEvent;
    procedure SetOnChangeTracking(const Value: TNotifyEvent);
    function GetOnValidate: TValidateTextEvent;
    procedure SetOnValidate(const Value: TValidateTextEvent);
    function GetOnValidating: TValidateTextEvent;
    procedure SetOnValidating(const Value: TValidateTextEvent);
    { ITextSettings }
    function GetDefaultTextSettings: TTextSettings;
    function GetResultingTextSettings: TTextSettings;
    function GetTextSettings: TTextSettings;
    procedure SetTextSettings(const Value: TTextSettings);
    function GetStyledSettings: TStyledSettings;
    procedure SetStyledSettings(const Value: TStyledSettings);
    function StyledSettingsStored: Boolean;
    { IVirtualKeyboardControl }
    function GetKeyboardType: TVirtualKeyboardType;
    procedure SetKeyboardType(Value: TVirtualKeyboardType);
    procedure SetReturnKeyType(Value: TReturnKeyType);
    function GetReturnKeyType: TReturnKeyType;
    function IsPassword: Boolean;
    { ICaret }
    function GetObject: TCustomCaret;
    procedure ShowCaret;
    procedure HideCaret;
    function GetCaretPosition: TCaretPosition; cdecl;
    procedure SetCaretPosition(const Value: TCaretPosition);
    function GetSelText: string;
    function GetFont: TFont;
    function GetFontColor: TAlphaColor;
    function GetSelectionFill: TBrush;
    function GetTextAlign: TTextAlign;
    function GetWordWrap: Boolean;
    procedure SetFont(const Value: TFont);
    procedure SetFontColor(const Value: TAlphaColor);
    procedure SetTextAlign(const Value: TTextAlign);
    procedure SetWordWrap(const Value: Boolean);
    procedure ObserverToggle(const AObserver: IObserver; const Value: Boolean);
    { IReadOnly }
    function GetReadOnly: Boolean;
    procedure SetReadOnly(const Value: Boolean);
  protected
    procedure DefineProperties(Filer: TFiler); override;
    function DefineModelClass: TDataModelClass; override;
    function DefinePresentationName: string; override;
    function GetData: TValue; override;
    procedure SetData(const Value: TValue); override;

    procedure DoBeginUpdate; override;
    procedure DoEndUpdate; override;

    function GetCanFocus: Boolean; override;

    function IsAddToContent(const AObject: TFmxObject): Boolean; override;

    { Live Binding }
    ///<summary>Retruns True if the control could be handled by live binding</summary>
    function CanObserve(const ID: Integer): Boolean; override;
    ///<summary>Registering observer handler after binding link was creaded</summary>
    procedure ObserverAdded(const ID: Integer; const Observer: IObserver); override;
  public
    constructor Create(AOwner: TComponent); override;
    ///<summary>Delete selected text</summary>
    procedure ClearSelection; deprecated 'Use DeleteSelection method instead';
    { ITextActions }
    ///<summary>Removes the selected text from the memo control</summary>
    procedure DeleteSelection;
    ///<summary>Copies the selected text to the clipboard</summary>
    procedure CopyToClipboard;
    ///<summary>Cuts the selected text to the clipboard</summary>
    procedure CutToClipboard;
    ///<summary>Pastes the text from the clipboard to the current caret position</summary>
    procedure PasteFromClipboard;
    ///<summary>Select all text</summary>
    procedure SelectAll;
    ///<summary>Selects the word containing the insertion point</summary>
    procedure SelectWord;
    ///<summary>Cancel the selection if it exists</summary>
    procedure ResetSelection;
    ///<summary>Moves the cursor to the end of the text in the memo</summary>
    procedure GoToTextEnd;
    ///<summary>Moves the cursor to the beginning of the text in the memo</summary>
    procedure GoToTextBegin;
    ///<summary>Replaces the <c>ALength</c> number of characters, beginning from the <c>AStartPos</c> position,
    ///with the the <c>AStr</c> string</summary>
    procedure Replace(const AStartPos: Integer; const ALength: Integer; const AStr: string);
    ///<summary>Moves the cursor to the end of the current line</summary>
    ///<remarks>When <c>WordWrap</c> is True the text line could be separated into several visual lines.
    ///Exactly those lines are considering to find end of the visible line at the insertion point.</remarks>
    procedure GoToLineEnd;
    ///<summary>Moves the cursor to the beginning of the current line</summary>
    ///<remarks>When <c>WordWrap</c> is True the text line could be separated into several visual lines.
    ///Exactly those lines are considering to find begin of the visible line at the insertion point.</remarks>
    procedure GoToLineBegin;
    ///<summary>Undoing the latest text change made in the memo</summary>
    procedure UnDo;

    ///<summary>Converts an absolute platform-specific position in text to a platform-independent position in the
    ///(line_number, position_in_line) format</summary>
    function TextPosToPos(const APos: Integer): TCaretPosition;
    ///<summary>Converts a platform-independent position in text to an absolute platform-specific position</summary>
    function PosToTextPos(const APostion: TCaretPosition): Integer;
    ///<summary>Inserts the <c>AFragment</c> string in the memo's text, after <c>APosition</c></summary>
    procedure InsertAfter(const APosition: TCaretPosition; const AFragment: string; const Options: TInsertOptions);
    ///<summary>Deletes the <c>ALength</c> number of characters, after the <c>APosition</c> position, from the memo's
    ///text</summary>
    procedure DeleteFrom(const APosition: TCaretPosition; const ALength: Integer; const Options: TDeleteOptions);

    ///<summary>The model handling the internal data of the memo control</summary>
    property Model: TCustomMemoModel read GetModel;
    ///<summary>The entire text in the memo</summary>
    property Text: string read GetText write SetText;
  public
    ///<summary>Determines whether all the text in the memo is automatically selected when the control gets
    ///focus</summary>
    property AutoSelect: Boolean read GetAutoSelect write SetAutoSelect;
    ///<summary>Provides access to the caret attached to the memo</summary>
    property Caret: TCaret read GetCaret write SetCaret;
    ///<summary>Defines whether to implement the 'UPPER' or 'lower' case conversion to the memo's text</summary>
    property CharCase: TEditCharCase read GetCharCase write SetCharCase;
    ///<summary>Defines whether the spell checking feature of the memo component is on or off</summary>
    property CheckSpelling: Boolean read GetCheckSpelling write SetCheckSpelling;
    ///<summary>Defines the types of information that can be detected in the memo's text
    ///(for native presentation on iOS only)</summary>
    property DataDetectorTypes: TDataDetectorTypes read GetDataDetectorTypes write SetDataDetectorTypes;
    ///<summary>Determines whether to cancel the visual indication of the selected text when the focus moves to another
    ///control.</summary>
    property HideSelectionOnExit: Boolean read GetHideSelectionOnExit write SetHideSelectionOnExit;
    ///<summary>Default IME text input mode</summary>
    property ImeMode: TImeMode read GetImeMode write SetImeMode;
    ///<summary>Defines the type of the on-screen keyboard to be displayed</summary>
    property KeyboardType: TVirtualKeyboardType read GetKeyboardType write SetKeyboardType;
    ///<summary>Provides access to individual lines of the memo's text</summary>
    property Lines: TStrings read GetLines write SetLines;
    ///<summary>The maximum number of characters that can be entered in the memo (0 - no explicit limitation)</summary>
    property MaxLength: Integer read GetMaxLength write SetMaxLength;
    ///<summary>Specifies whether the user can change the memo's text</summary>
    property ReadOnly: Boolean read GetReadOnly write SetReadOnly;
    ///<summary>The current cursor position in the text</summary>
    property CaretPosition: TCaretPosition read GetCaretPosition write SetCaretPosition;
    ///<summary>The brush that is used to draw a text selection region</summary>
    property SelectionFill: TBrush read GetSelectionFill;
    ///<summary>Text font</summary>
    property Font: TFont read GetFont write SetFont;
    ///<summary>The font color of the text in this memo</summary>
    property FontColor: TAlphaColor read GetFontColor write SetFontColor;
    ///<summary>Horizontal text alignment</summary>
    property TextAlign: TTextAlign read GetTextAlign write SetTextAlign;
    ///<summary>Specifies whether to wrap the text when its length is greater than the memo width</summary>
    property WordWrap: Boolean read GetWordWrap write SetWordWrap;
    ///<summary>The number of the first character selected in the memo's text</summary>
    property SelStart: Integer read GetSelStart write SetSelStart;
    ///<summary>The number of characters selected in the memo's text</summary>
    property SelLength: Integer read GetSelLength write SetSelLength;
    ///<summary>The currently selected fragment in the memo's text</summary>
    property SelText: string read GetSelText;
    ///<summary>The text representation properties that are applied from the current style</summary>
    property StyledSettings: TStyledSettings read GetStyledSettings write SetStyledSettings
      stored StyledSettingsStored nodefault;
    ///<summary>The container for the current text visualization properties</summary>
    property TextSettings: TTextSettings read GetTextSettings write SetTextSettings;
    ///<summary>Raises when the memo has lost the focus or the user has pressed ENTER (but only if some changes in the
    ///text have been made)</summary>
    property OnChange: TNotifyEvent read GetOnChange write SetOnChange;
    ///<summary>Raises when any change has been made in the text</summary>
    property OnChangeTracking: TNotifyEvent read GetOnChangeTracking write SetOnChangeTracking;
    ///<summary>Raises to validate any change has been made in the text
    ///(raises before the OnChangeTracking event)</summary>
    property OnValidating: TValidateTextEvent read GetOnValidating write SetOnValidating;
    ///<summary>Raises to validate changes have been made in the text when the memo has lost the focus or the user
    ///has pressed ENTER (raises before OnChange event)</summary>
    property OnValidate: TValidateTextEvent read GetOnValidate write SetOnValidate;
  end;

  TMemo = class(TCustomMemo)
  published
    property AutoHide;
    property AutoSelect default False;
    property Caret;
    property CharCase default TCustomMemoModel.DefaultCharCase;
    property CheckSpelling default False;
    property DataDetectorTypes;
    property DisableMouseWheel;
    property HideSelectionOnExit default True;
    property ImeMode default TImeMode.imDontCare;
    property KeyboardType default TVirtualKeyboardType.Default;
    property Lines;
    property MaxLength default 0;
    property ReadOnly default False;
    property ShowScrollBars default True;
    property ShowSizeGrip;
    property StyledSettings;
    property TextSettings;
    property OnChange;
    property OnChangeTracking;
    property OnValidating;
    property OnValidate;
    { inherited }
    property Align;
    property Anchors;
    property Bounces;
    property CanFocus default True;
    property CanParentFocus;
    property ClipChildren;
    property ClipParent;
    property ControlType;
    property Cursor default crIBeam;
    property DisableFocusEffect;
    property DragMode;
    property Enabled;
    property EnabledScroll;
    property EnableDragHighlight;
    property Height;
    property HelpContext;
    property HelpKeyword;
    property HelpType;
    property Hint;
    property HitTest;
    property Locked;
    property Margins;
    property Opacity;
    property Padding;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property StyleLookup;
    property TabOrder;
    property TabStop;
    property TouchTargetExpansion;
    property Visible;
    property Width;
    property ParentShowHint;
    property ShowHint;
    { Events }
    property OnApplyStyleLookup;
    property OnFreeStyle;
    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;
    property OnEnter;
    property OnExit;
    property OnKeyUp;
    property OnKeyDown;
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnViewportPositionChange;
    property OnPresentationNameChoosing;
  end;

//== INTERFACE END: FMX.Memo
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.ListView.Appearances (from FMX.ListView.Appearances.pas)
//==================================================================================================


type
  TItemControlEvent = procedure(const Sender: TObject; const AItem: TListItem; const AObject: TListItemSimpleControl) of object;

  TListViewItem = class;
  TItemAppearanceProperties = class;
  TPublishedObjects = class;

  /// <summary>An extension of TListView that uses appearance-based items.
  /// </summary>
  IAppearanceItemOwner = interface
    ['{A3CAF8E2-ECD5-4989-9B03-B3E79B02DFBC}']
    /// <summary>Return array of TItemAppearanceProperties specific for this ListView.
    /// The array includes appearances for various item purposes and state, namely
    /// Item, ItemEdit, Header and Footer.
    /// </summary>
    function GetAppearanceProperties: TArray<TItemAppearanceProperties>;
    /// <summary>Begin control update. Uses the same semantics as TControl.BeginUpdate</summary>
    procedure BeginUpdate;
    /// <summary>End  control update. Uses the same semantics as TControl.EndUpdate</summary>
    procedure EndUpdate;
  end;

  /// <summary>Interface from TPublishedAppearance and TItemAppearanceProperties
  /// to its owner (TAppearanceListView).</summary>
  IPublishedAppearanceOwner = interface
    ['{990AB866-92AB-4552-BB12-223F44CFD062}']
    /// <summary>Notify the owner of appearance change</summary>
    procedure ItemAppearanceChange(const Sender: TItemAppearanceProperties);
    /// <summary>Notify the owner of appearance view change</summary>
    procedure ItemAppearanceChangeObjects(const Sender: TItemAppearanceProperties);
    /// <summary>Notify the owner of appearance height change</summary>
    procedure ItemAppearanceChangeHeight(const Sender: TItemAppearanceProperties);
    /// <summary>Query owner if it's currently in edit mode</summary>
    function IsEditMode: Boolean;
    /// <summary>Get header height</summary>
    function GetHeaderHeight: Integer;
    /// <summary>Set header height</summary>
    procedure SetHeaderHeight(const Value: Integer);
    /// <summary>Get footer height</summary>
    function GetFooterHeight: Integer;
    /// <summary>Set footer height</summary>
    procedure SetFooterHeight(const Value: Integer);
    /// <summary>Get regular item height</summary>
    function GetItemHeight: Integer;
    /// <summary>Set regular item height</summary>
    procedure SetItemHeight(const Value: Integer);
    /// <summary>Get regular item edit mode height</summary>
    function GetItemEditHeight: Integer;
    /// <summary>Set regular item edit mode height</summary>
    procedure SetItemEditHeight(const Value: Integer);

    /// <summary>Get footer apperance name</summary>
    function GetFooterAppearanceName: string;
    /// <summary>Set footer apperance name</summary>
    procedure SetFooterAppearanceName(const Value: string);
    /// <summary>Get header appearance name</summary>
    function GetHeaderAppearanceName: string;
    /// <summary>Set header appearance name</summary>
    procedure SetHeaderAppearanceName(const Value: string);
    /// <summary>Get regular item appearance name</summary>
    function GetItemAppearanceName: string;
    /// <summary>Set regular item appearance name</summary>
    procedure SetItemAppearanceName(const Value: string);
    /// <summary>Get regular item appearance name in edit mode</summary>
    function GetItemEditAppearanceName: string;
    /// <summary>Set regular item appearance name in edit mode</summary>
    procedure SetItemEditAppearanceName(const Value: string);

    /// <summary>Get footer appearance properties</summary>
    function GetFooterAppearanceProperties: TItemAppearanceProperties;
    /// <summary>Get header appearance properties</summary>
    function GetHeaderAppearanceProperties: TItemAppearanceProperties;
    /// <summary>Get regular item appearance properties</summary>
    function GetItemAppearanceProperties: TItemAppearanceProperties;
    /// <summary>Get regular item appearance properties in edit mode</summary>
    function GetItemEditAppearanceProperties: TItemAppearanceProperties;
    /// <summary>Setter for ItemAppearanceObjects property</summary>
    procedure SetItemAppearanceObjects(const Value: TPublishedObjects);
    /// <summary>Getter for ItemAppearanceObjects property</summary>
    function GetItemAppearanceObjects: TPublishedObjects;

    /// <summary>Footer height</summary>
    property FooterHeight: Integer read GetFooterHeight write SetFooterHeight;
    /// <summary>Header height</summary>
    property HeaderHeight: Integer read GetHeaderHeight write SetHeaderHeight;
    /// <summary>Regular item height</summary>
    property ItemHeight: Integer read GetItemHeight write SetItemHeight;
    /// <summary>Regular item height in edit mode</summary>
    property ItemEditHeight: Integer read GetItemEditHeight write SetItemEditHeight;

    /// <summary>Footer appearance name</summary>
    property FooterAppearanceName: string read GetFooterAppearanceName write SetFooterAppearanceName;
    /// <summary>Header appearance name</summary>
    property HeaderAppearanceName: string read GetHeaderAppearanceName write SetHeaderAppearanceName;
    /// <summary>Regular item appearance name</summary>
    property ItemAppearanceName: string read GetItemAppearanceName write SetItemAppearanceName;
    /// <summary>Regular appearance name in edit mode</summary>
    property ItemEditAppearanceName: string read GetItemEditAppearanceName write SetItemEditAppearanceName;

    /// <summary>Footer appearance properties</summary>
    property FooterAppearanceProperties: TItemAppearanceProperties read GetFooterAppearanceProperties;
    /// <summary>Header appearance properties</summary>
    property HeaderAppearanceProperties: TItemAppearanceProperties read GetHeaderAppearanceProperties;
    /// <summary>Regular item appearance properties</summary>
    property ItemAppearanceProperties: TItemAppearanceProperties read GetItemAppearanceProperties;
    /// <summary>Regular item appearance properties in edit mode</summary>
    property ItemEditAppearanceProperties: TItemAppearanceProperties read GetItemEditAppearanceProperties;
    /// <summary>Access instance of TPublishedObjects used by ListView</summary>
    property ItemAppearanceObjects: TPublishedObjects read GetItemAppearanceObjects write SetItemAppearanceObjects;
  end;

  TAppearanceNamePair = TPair<string (*Identifier*), string (*displayname*)>;
  TAppearanceType = (Item, ItemEdit, Header, Footer);

  TItemAppearanceObjects = class;

  /// <summary>Standard appearance names</summary>
  TAppearanceNames = class
  public const
    Empty = '';
    Null = 'Null';
    Custom = 'Custom';
    ListHeader = 'ListHeader';
    // ListItem group
    ListItem = 'ListItem';
    ListItemDelete = 'ListItemDelete';
    ListItemShowCheck = 'ListItemShowCheck';
    // ListItemRightDetail group
    ListItemRightDetail = 'ListItemRightDetail';
    ListItemRightDetailDelete = 'ListItemRightDetailDelete';
    ListItemRightDetailShowCheck = 'ListItemRightDetailShowCheck';
    // ImageListItemgec group
    ImageListItem = 'ImageListItem';
    ImageListItemDelete = 'ImageListItemDelete';
    ImageListItemShowCheck = 'ImageListItemShowCheck';
    ImageListItemBottomDetail = 'ImageListItemBottomDetail';
    ImageListItemBottomDetailShowCheck = 'ImageListItemBottomDetailShowCheck';
    ImageListItemBottomDetailRightButton = 'ImageListItemBottomDetailRightButton';
    ImageListItemBottomDetailRightButtonShowCheck = 'ImageListItemBottomDetailRightButtonShowCheck';
    // ListItemRightButton group
    ImageListItemRightButton = 'ImageListItemRightButton';
    ImageListItemRightButtonDelete = 'ImageListItemRightButtonDelete';
    ImageListItemRightButtonShowCheck = 'ImageListItemRightButtonShowCheck';
  end;

  /// <summary>Extended items adapter that supports item appearances. This is the default adapter used by
  /// TAppearanceListView. It implements all extensions supported by TAppearanceListView.
  ///</summary>
  TAppearanceListViewItems = class(TFilterableListViewItems, IListViewAdapter, IListViewCheckProvider, IListViewEditor,
    IListViewFilterable, IListViewTextProvider, IListViewTextButtonProvider, IListViewGlyphButtonProvider,
    IListViewExtrasProvider)
  strict private
    [Weak] FOwnerControl: TControl;
    FIsDelayedChanged: Boolean;
    FNewItems: TListItemsList;
    FAsFilterable: IListViewFilterable;
    FPresentationParent: IListViewPresentationParent;
    FListViewController: IListViewController;
    { IListViewEditor }
    FBeforeItemAdded: TBeforeItemAddedNotify;
    FAfterItemAdded: TAfterItemAddedNotify;
    FBeforeItemDeleted: TBeforeItemDeletedNotify;
    FAfterItemDeleted: TAfterItemDeletedNotify;
    FCheckedCount: Integer;

    { IListViewEditor }
    function EditorAdd: TListItem;
    function EditorInsert(const Index: Integer): TListItem;

    procedure SetBeforeItemAdded(const AHandler: TBeforeItemAddedNotify);
    procedure SetAfterItemAdded(const AHandler: TAfterItemAddedNotify);
    procedure SetBeforeItemDeleted(const AHandler: TBeforeItemDeletedNotify);
    procedure SetAfterItemDeleted(const AHandler: TAfterItemDeletedNotify);

    { IListViewTextProvider }
    function GetText(const Index: Integer): string;
    function GetIndexTitle(const Index: Integer): string;

    { IListViewGlyphButtonProvider }
    function GetGlyphButtonDrawable(const Index: Integer): TListItemGlyphButton;

    { IListViewTextButtonProvider }
    function GetTextButtonDrawable(const Index: Integer): TListItemTextButton;

    { IListViewExtrasProvider }
    function GetItemData(const Index: Integer; const DataIndex: string): TValue;
    procedure SetItemData(const Index: Integer; const DataIndex: string; const AValue: TValue);
    function GetHasData(const Index: Integer; const DataIndex: string): Boolean;
    function GetItemTag(const Index: Integer): NativeInt;
    procedure SetItemTag(const Index: Integer; const AValue: NativeInt);

  strict private
    function GetAppearanceItem(const Index: Integer): TListViewItem;
  strict protected
    /// <summary>Create drawables for newly added items.</summary>
    procedure DoCreateNewViews; override;
    /// <summary>Apply filter to given item</summary>
    function DoFilterItem(const Item: TListItem): Boolean; override;
    /// <summary>Recreate drawables for items with given purposes.</summary>
    procedure DoResetViews(const APurposes: TListItemPurposes); override;
    /// <summary>Clear the list of items.</summary>
    procedure DoClear; virtual;
    /// <summary>Add new item at index Index and return it.</summary>
    function DoAddItem(const Index: Integer = -1): TListViewItem; virtual;
    procedure DoEndUpdate; override;
  protected
    /// <summary>Owner control, <c>TAppearanceListView</c></summary>
    property OwnerControl: TControl read FOwnerControl;
    /// <summary>Owner control as <c>IAppearanceItemOwner</c></summary>
    function AppearanceItemOwner: IAppearanceItemOwner;
  public
    constructor Create(const Owner: TControl);
    destructor Destroy; override;
    function IListViewEditor.Add = EditorAdd;
    function IListViewEditor.Insert = EditorInsert;
    /// <summary>Sort items using given AComparer</summary>
    procedure Sort(AComparer: IComparer<TListViewItem>); overload;
    { IListViewCheckable }
    /// <summary>True if there is an item such that Item.Checked = AChecked</summary>
    function AnyChecked(const AChecked: Boolean = True): Boolean;
    /// <summary>Index of the first item where Item.Checked = AChecked</summary>
    function FirstChecked(const AChecked: Boolean = True): Integer;
    /// <summary>Count items where Item.Checked = AChecked</summary>
    function CheckedCount(const AChecked: Boolean = True): Integer;
    /// <summary>Change check state of all items</summary>
    procedure CheckAll(const AChecked: Boolean = True); overload;
    /// <summary>Change check state of all items. If ACallback is not nil, it should return True
    /// for items state of which should be changed. Callback argument is Item Index, return value is
    /// a Boolean which enables or disables state change for given index.</summary>
    procedure CheckAll(const ACallback: TFunc<Integer, Boolean>; const AChecked: Boolean = True); overload;
    function GetChecked(const Index: Integer): Boolean;
    procedure SetChecked(const Index: Integer; const Value: Boolean);
    /// <summary>Get/set checked state of item at Index</summary>
    property Checked[const Index: Integer]: Boolean read GetChecked write SetChecked;
    /// <summary>Return indexes of all checked (if AChecked = True) or unchecked (AChecked = False) items.</summary>
    function CheckedIndexes(const AChecked: Boolean): TArray<Integer>; overload;
    /// <summary>Return indexes of all checked (if AChecked = True) or unchecked (AChecked = False) items.
    /// AOrder specifies order of returned items, TListViewItems.TOrder.FirstToLast or
    /// TListViewItems.TOrder.LastToFirst.</summary>
    function CheckedIndexes(const AOrder: TListViewItems.TOrder; const AChecked: Boolean): TArray<Integer>; overload;
    /// <summary>Obtain TEnumerator<TListViewItem> for this adapter</summary>
    function GetEnumerator: TEnumerator<TListViewItem>; reintroduce;
    /// <summary>Perform recounting of all items, find AItem and return its index or -1 if not found.
    /// This method is called by implementation <c>IListViewController.RequestReindexing</c> in
    /// <c>TListViewBase</c></summary>
    function ReindexAndFindItem(const AItem: TListViewItem): Integer; // item reindexer, formerly in ListView

    { IListViewEditor }
    /// <summary>Create a new TListViewItem and append it at the end of list of items</summary>
    /// <returns>New item instance</returns>
    function Add: TListViewItem;
    /// <summary>Create a new TListViewItem and insert it before position specified by Index</summary>
    /// <returns>New item instance</returns>
    function Insert(const Index: Integer): TListViewItem;
    /// <summary>Delete an item with index Index</summary>
    procedure Delete(const Index: Integer);
    /// <summary>Dispose of all items at once</summary>
    procedure Clear;
    /// <summary>Same as Insert(Index)</summary>
    function AddItem(const Index: Integer = -1): TListViewItem;
    /// <summary>Default index property. Get a TListViewItem at index.</summary>
    property AppearanceItem[const Index: Integer]: TListViewItem read GetAppearanceItem; default;
    /// <summary>Return this adapter as IListViewFilterable</summary>
    property AsFilterable: IListViewFilterable read FAsFilterable;
  end;

  /// <summary>Extension of <c>TListItem</c> that supports Appearances.
  /// Forms content of <c>TAppearanceListViewItems</c></summary>
  TListViewItem = class(TListItem)
  private type
    TFlag = (HasButtonText, HasCheck);
    TFlags = set of TFlag;
  public type
    /// <summary>Standard appearance object names</summary>
    TObjectNames = class
    public const
      Text = 'T'; // do not localize
      Detail = 'D'; // do not localize
      Accessory = 'A'; // do not localize
      TextButton = 'B'; // do not localize
      GlyphButton = 'G'; // do not localize
      Image = 'I'; // do not localize
    end;
    /// <summary>Standard appearance object data members</summary>
    TMemberNames = class
    public const
      Text = 'Text'; // do not localize
      Detail = 'Detail'; // do not localize
      ButtonText = 'ButtonText'; // do not localize
      Bitmap = 'Bitmap'; // do not localize
      ImageIndex = 'ImageIndex'; // do not localize
    end;

    /// <summary>Extension of <c>TListItemView</c> which defines public properties for commonly used drawables</summary>
    TListViewItemObjects = class(TListItemView)
    strict private
      FAppearance: TItemAppearanceObjects;
      function GetDetailObject: TListItemText;
      function GetGlyphButton: TListItemGlyphButton;
      function GetImageObject: TListItemImage;
      function GetTextButton: TListItemTextButton;
      function GetTextObject: TListItemText;
      function GetAccessoryObject: TListItemAccessory;
    public
      procedure Clear; override;
      /// <summary>Find <c>TListItemDrawable</c> object of type <c>T</c> with the name <c>AName</c></summary>
      function FindObjectT<T: TListItemDrawable>(const AName: string): T;
      /// <summary>Text drawable object</summary>
      property TextObject: TListItemText read GetTextObject;
      /// <summary>Detail text drawable object</summary>
      property DetailObject: TListItemText read GetDetailObject;
      /// <summary>Image drawable object</summary>
      property ImageObject: TListItemImage read GetImageObject;
      /// <summary>Text button drawable object</summary>
      property TextButton: TListItemTextButton read GetTextButton;
      /// <summary>Glyph button drawable object</summary>
      property GlyphButton: TListItemGlyphButton read GetGlyphButton;
      /// <summary>Accessory drawable object</summary>
      property AccessoryObject: TListItemAccessory read GetAccessoryObject;
      /// <summary>Reference to <c>TItemAppearanceObjects</c> that serve as prototypes
      /// for the drawables in this view</summary>
      property Appearance: TItemAppearanceObjects read FAppearance write FAppearance;
    end;

  private type
    TDirtyDrawable = (Text, Detail, Check, ButtonText, Accessory, ImageIndex, BitmapValue, BitmapRef);
    TDirtyDrawables = set of TDirtyDrawable;

  private
    FData: TDictionary<string, TValue>;
    FDataBitmaps: TDictionary<string, TBitmap>;
    FFlags: TFlags;
    FText: string;
    FDetail: string;
    FIndexTitle: string;
    FButtonText: string;
    FAccessory: TAccessoryType;
    FBitmap: TBitmap;
    FChecked: Boolean;
    FImageIndex: Integer;
    [Weak] FBitmapRef: TBitmap;
    FCreatingObjectsGuard: Boolean;
    FDirtyDrawables: TDirtyDrawables;
    FPresentationParent: IListViewPresentationParent;
    procedure SetText(const Value: string);
    function GetBitmap: TBitmap;
    procedure SetAccessory(const Value: TAccessoryType);
    procedure SetDetail(const Value: string);
    procedure SetButtonText(const Value: string);
    procedure SetImageIndex(Value: Integer);
    procedure SetBitmap(const Value: TBitmap);
    procedure OnBitmapChanged(Sender: TObject);
    procedure SetBitmapRef(const Value: TBitmap);
    procedure CheckBitmap;
    function GetChecked: Boolean;
    procedure SetChecked(const Value: Boolean);
    function GetViewObjects: TListViewItemObjects;
    function GetData(const AIndex: string): TValue;
    procedure SetData(const AIndex: string; const AValue: TValue);
    function GetIndexTitle: string;
    procedure SetIndexTitle(const Value: string);
    procedure UpdateDrawables;
  protected
    function GetIndex: Integer; override;
    /// <summary>True if user-specified button text is set for this item. If user text is not specified,
    /// the value defined by Text Button Appearance will be used.</summary>
    function GetHasButtonText: Boolean;
    function GetHasData(const AIndex: string): Boolean;
    function ListItemObjectsClass: TListItem.TListItemViewType; override;
    procedure SetPurpose(const AValue: TListItemPurpose); override;
    procedure InvalidateHeights; override;
    procedure ClearData(const AIndex: string);
  public
    constructor Create(const Owner: TAppearanceListViewItems; PresentationParent: IListViewPresentationParent;
      AController: IListViewController);
    destructor Destroy; override;
    procedure CreateObjects; override;
    procedure WillBePainted; override;
    /// <summary> Main text for the cell. </summary>
    property Text: string read FText write SetText;
    /// <summary> Detail (smaller) text for the cell. This may either appear below or to the right of main text,
    /// depending on currently selected appearance. It may also not appear at all. </summary>
    property Detail: string read FDetail write SetDetail;
    /// <summary>Shortcut letter that appears on the right of the list in native iOS presentations.</summary>
    property IndexTitle: string read GetIndexTitle write SetIndexTitle;
    /// <summary>Accessory type. Used if the appearance defines an accessory item.</summary>
    property Accessory: TAccessoryType read FAccessory write SetAccessory;
    /// <summary>Bitmap to be used by default Image Appearance Item. Assigning this property will
    /// create a bitmap copy stored in this item.</summary>
    property Bitmap: TBitmap read GetBitmap write SetBitmap;
    /// <summary>Bitmap reference to be used by default Image Appearance Item. The bitmap will not be
    /// copied to the item, the original TBitmap object should be managed by the user.</summary>
    property BitmapRef: TBitmap read FBitmapRef write SetBitmapRef;
    /// <summary>Text to be used by default TextButton Appearance Item.</summary>
    property ButtonText: string read FButtonText write SetButtonText;
    ///<summary>Zero based index of an image in the ImageList. The default is <c>-1</c>.
    ///<para> See also <b>FMX.ActnList.IGlyph</b></para></summary>
    ///<remarks>If non-existing index is specified, an image is not drawn and no exception is raised</remarks>
    property ImageIndex: Integer read FImageIndex write SetImageIndex;
    ///<summary>True if this item is checked. Only valid in EditMode</summary>
    property Checked: Boolean read GetChecked write SetChecked;
    ///<summary>An extension of TListItemView that has public references to the default set of drawables
    /// used by predefined appearances</summary>
    property Objects: TListViewItemObjects read GetViewObjects;
    /// <summary>Set or get arbitrary data values. Once set, the values will be stored in the item.
    /// Data values with AIndex matching AppearanceItem Name will be used to initialize
    /// that the Drawable created by that Appearance Item. For example, Data['Text'] := MyText will initialize
    /// the drawable managed by the appearance item called 'Text' using myText. </summary>
    property Data[const AIndex: string]: TValue read GetData write SetData;
    /// <summary>True if a value with index AIndex is stored in this item</summary>
    property HasData[const AIndex: string]: Boolean read GetHasData;
  end;

  /// <summary>Compatibility alias</summary>
  TAppearanceListViewItem = TListViewItem;

{$REGION 'Appearance object declarations'}
  /// <summary>Base object appearance class. Object appearance creates a <c>TListItemDrawable</c> in a given item,
  ///  thus serving as a kind of view constructor for item views.
  ///  When <c>TAppearanceListView</c> needs to create an item view, it gets TItemAppearanceObjects (Item Appearance)
  ///  and invokes <c>TObjectAppearance.ResetObject(TListViewItem)</c> on each of them
  /// </summary>
  TObjectAppearance = class abstract (TInterfacedPersistent, IDesignablePersistent)
  public type
    /// <summary>Display name :-&gt; Data member</summary>
    TDataMember = TPair<string, string>;
    TDataMembers = TArray<TDataMember>;
  private
    [Weak] FOwner: TItemAppearanceObjects;
    FName: string;
    FDefaultValues: TObjectAppearance;
    FVisible: Boolean;
    FOnChange: TNotifyEvent;
    FOnHeightChange: TNotifyEvent;
    FInitializing: Boolean;
    FDataMembers: TDataMembers;
    FUsingDefaultValues: Boolean;
    FShim: IPersistentShim;

    procedure SetDefaultValues(const Value: TObjectAppearance);
    function IgnoreChanges: Boolean;
    procedure SetVisible(const Value: Boolean);
    { IDesignablePersistent }
    function GetBoundsRect: TRect;
    function GetDesignParent: TPersistent;
    procedure BindShim(AShim: IPersistentShim);
    procedure UnbindShim;
    procedure IDesignablePersistent.Bind = BindShim;
    procedure IDesignablePersistent.Unbind = UnbindShim;
    function BeingDesigned: Boolean;
  protected
    /// <summary>Invoke <c>OnChange</c></summary>
    procedure DoChange; virtual;
    /// <summary>Invoke <c>OnHeightChange</c></summary>
    procedure DoHeightChange; virtual; deprecated;
    function IsActive: Boolean; virtual;
    function GetHeight: Integer; virtual;
    function CreateDefaultValues: TObjectAppearance; virtual;
  public
    constructor Create; overload; virtual;
    constructor Create(AIsDefaultValues: Boolean); overload;
    destructor Destroy; override;
    /// <summary>Initialize self using default values</summary>
    procedure RestoreDefaults; virtual;
    procedure AfterConstruction; override;
    /// <summary>BeginUpdate/EndUpdate delegates update cycle to the owner control</summary>
    procedure BeginUpdate;
    /// <summary>BeginUpdate/EndUpdate delegates update cycle to the owner control</summary>
    procedure EndUpdate;
    /// <summary>Create a drawable in the view after own image and initialize it with appearance properties.
    /// For example, TCustomTextObjectAppearance.CreateObject creates an instance of TListItemText </summary>
    procedure CreateObject(const AListViewItem: TListViewItem); virtual; abstract;
    /// <summary>Find drawable that matches type and name of self in AListViewItem.View, and initialize it.</summary>
    procedure ResetObject(const AListViewItem: TListViewItem); virtual; abstract;
    /// <summary>Default values</summary>
    property DefaultValues: TObjectAppearance read FDefaultValues write SetDefaultValues;
    /// <summary>Owner appearance</summary>
    property Owner: TItemAppearanceObjects read FOwner write FOwner;
    /// <summary>Name of object appearance</summary>
    property Name: string read FName write FName;
    /// <summary>Data members</summary>
    property DataMembers: TDataMembers read FDataMembers write FDataMembers;
    /// <summary>Invoked on change</summary>
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    /// <summary>Invoked on height change</summary>
    property OnHeightChange: TNotifyEvent read FOnHeightChange write FOnHeightChange;
    /// <summary>Height</summary>
    property Height: Integer read GetHeight;
    /// <summary>Determines whether the current item is visible or not</summary>
    property Visible: Boolean read FVisible write SetVisible;
  end;

  /// <summary>Compatibility alias</summary>
  TListItemObjectClass = class of TListItemDrawable;

  /// <summary>Common implementation of TObjectAppearance</summary>
  TCommonObjectAppearance = class(TObjectAppearance, IMovablePersistent)
  strict private
    FWidth: Single;
    FHeight: Single;
    FAlign: TListItemAlign;
    FVertAlign: TListItemAlign;
    FPlaceOffset: TPosition;
    FInternalPlaceOffset: TPosition;
    FInternalWidth: Single;
    FInternalHeight: Single;
    FOpacity: Single;
    procedure SetAlign(const Value: TListItemAlign);
    procedure SetPlaceOffset(const Value: TPosition);
    procedure SetVertAlign(const Value: TListItemAlign);
    procedure SetHeight(const Value: Single);
    procedure SetWidth(const Value: Single);
    procedure OnPlaceOffsetChange(Sender: TObject);
    procedure SetInternalPlaceOffset(const Value: TPosition);
    procedure SetOpacity(const Value: Single);
    procedure SetInternalWidth(const Value: Single);
    procedure SetInternalHeight(const Value: Single);
  private
    function GetActualHeight: Single;
    function GetActualPlaceOffset: TPointF;
    function GetActualWidth: Single;
    function GetWidthWhenVisible: Single;
    function GetHeightWhenVisible: Single;
    function GetSizeWhenVisible: TPointF;
  protected
    procedure AssignTo(ADest: TPersistent); override;
    /// <summary></summary>
    procedure InitDefaultValues(const ADefaults: TCommonObjectAppearance); virtual;
    /// <summary>Find or create new drawable object of type T named Name in item AListViewItem
    /// and initialize it by assigning self.</summary>
    procedure ResetObjectT<T: TListItemDrawable>(const AListViewItem: TListViewItem);
    function IsAlignStored: Boolean;
    function IsVertAlignStored: Boolean;
    function IsVisibleStored: Boolean;
    function IsPlaceOffsetStored: Boolean;
    function IsWidthStored: Boolean;
    function IsHeightStored: Boolean;
    function IsOpacityStored: Boolean;

    { IMovablePersistent }
    procedure SetBoundsRect(const AValue: TRect);
  public
    constructor Create; override;
    destructor Destroy; override;
    /// <summary>Get actual height of the Appearance Object. The return value is:
    ///  If Visible = True:
    ///    Value of property Height if it is not zero.
    ///    Value of property InternalHeight otherwise.
    ///  If Visible = False:
    ///    0
    /// </summary>
    property ActualHeight: Single read GetActualHeight;
    /// <summary>Get actual width of the Appearance Object. The return value is:
    ///  If Visible = True:
    ///    Value of property Width if it is not zero.
    ///    Value of property InternalWidth otherwise.
    ///  If Visible = False:
    ///    0
    /// </summary>
    property ActualWidth: Single read GetActualWidth;
    /// <summary>Width of this object appearance regardless of current visibility</summary>
    property WidthWhenVisible: Single read GetWidthWhenVisible;
    /// <summary>Height of this object appearance regardless of current visibility</summary>
    property HeightWhenVisible: Single read GetHeightWhenVisible;
    /// <summary>Size of this object appearance regardless of current visibility</summary>
    property SizeWhenVisible: TPointF read GetSizeWhenVisible;
    /// <summary>Actual offset from the calculated position: PlaceOffset if nonzero, InternalPlaceOffset otherwise.</summary>
    property ActualPlaceOffset: TPointF read GetActualPlaceOffset;
    /// <summary>Internal width</summary>
    property InternalWidth: Single read FInternalWidth write SetInternalWidth;
    /// <summary>Internal height</summary>
    property InternalHeight: Single read FInternalHeight write SetInternalHeight;
    /// <summary>Internal PlaceOffset</summary>
    property InternalPlaceOffset: TPosition read FInternalPlaceOffset write SetInternalPlaceOffset;
    // Local width of list item inside its designated area.
    property Width: Single read FWidth write SetWidth;
    // Local height of list item inside its designated area.
    property Height: Single read FHeight write SetHeight;
    /// <summary>Horizontal alignment of Appearance Object inside its designated area.</summary>
    property Align: TListItemAlign read FAlign write SetAlign;
    /// <summary>Vertical alignment of Appearance Object inside its designated area.</summary>
    property VertAlign: TListItemAlign read FVertAlign write SetVertAlign;
    /// <summary>Offset from aligned location for placement control</summary>
    property PlaceOffset: TPosition read FPlaceOffset write SetPlaceOffset;
    /// <summary>Opacity of this Appearance Object</summary>
    property Opacity: Single read FOpacity write SetOpacity;
  end;

  TTextShadowOptions = class(TPersistent)
  public const
    DefaultEnabled = True;
    DefaultColor = TAlphaColorRec.Null;
  private
    [Weak] FOwner: TPersistent;
    FEnabled: Boolean;
    FColor: TAlphaColor;
    FOnChanged: TNotifyEvent;
    procedure SetColor(const Value: TAlphaColor);
    procedure SetEnabled(const Value: Boolean);
  protected
    function GetOwner: TPersistent; override;
    procedure AssignTo(Dest: TPersistent); override;
    procedure Changed; virtual;
  public
    constructor Create(AOwner: TPersistent);
    destructor Destroy; override;
    function Equals(Obj: TObject): Boolean; override;
    property OnChanged: TNotifyEvent read FOnChanged write FOnChanged;
  published
    property Color: TAlphaColor read FColor write SetColor default DefaultColor;
    property Enabled: Boolean read FEnabled write SetEnabled default DefaultEnabled;
  end;

  /// <summary>Text object appearance: main item text or detail text</summary>
  TCustomTextObjectAppearance = class(TCommonObjectAppearance)
  private
    FFont: TFont;
    FFontDirty: Boolean;
    FTextLayout: TTextLayout;

    FTextAlign: TTextAlign;
    FTextVertAlign: TTextAlign;
    FWordWrap: Boolean;

    FTextColor: TAlphaColor;
    FTextShadow: TTextShadowOptions;
    FTrimming: TTextTrimming;
    FIsDetailText: Boolean;

    procedure FontChanged(Sender: TObject);
    procedure TextShadowChanged(Sender: TObject);

    procedure SetTextAlign(const Value: TTextAlign);
    procedure SetTextVertAlign(const Value: TTextAlign);
    procedure SetWordWrap(const Value: Boolean);
    procedure SetTextColor(const Value: TAlphaColor);
    procedure SetTrimming(const Value: TTextTrimming);
    procedure SetFont(const Value: TFont);
    function GetDefaultValues: TCustomTextObjectAppearance;
    procedure SetIsDetailText(const Value: Boolean);
    procedure SetTextShadow(const Value: TTextShadowOptions);
  protected
    procedure AssignTo(ADest: TPersistent); override;
    function CreateDefaultValues: TObjectAppearance; override;

    function IsFontStored: Boolean;
    function IsTextAlignStored: Boolean;
    function IsTextVertAlignStored: Boolean;
    function IsWordWrapStored: Boolean;
    function IsDetailTextStored: Boolean;
    function IsTextColorStored: Boolean;
    function IsTextShadowStored: Boolean;
    function IsOpacityStored: Boolean;
    function IsTrimmingStored: Boolean;
  public
    constructor Create; override;
    destructor Destroy; override;
    procedure CreateObject(const AListViewItem: TListViewItem); override;
    procedure ResetObject(const AListViewItem: TListViewItem); override;
    /// <summary>Text font</summary>
    property Font: TFont read FFont write SetFont;
    /// <summary>Horizontal text alignment inside local item rectangle</summary>
    property TextAlign: TTextAlign read FTextAlign write SetTextAlign;
    /// <summary>Vertical text alignment inside local item rectangle</summary>
    property TextVertAlign: TTextAlign read FTextVertAlign write SetTextVertAlign;
    /// <summary>Word wrap</summary>
    property WordWrap: Boolean read FWordWrap write SetWordWrap;
    /// <summary>Text color</summary>
    property TextColor: TAlphaColor read FTextColor write SetTextColor;
    /// <summary>Shadow text color</summary>
    property TextShadow: TTextShadowOptions read FTextShadow write SetTextShadow;
    /// <summary>Text trimming</summary>
    property Trimming: TTextTrimming read FTrimming write SetTrimming;
    /// <summary>Is this regular or detail text</summary>
    property IsDetailText: Boolean read FIsDetailText write SetIsDetailText;
    /// <summary>Default appearance</summary>
    property DefaultValues: TCustomTextObjectAppearance read GetDefaultValues;
  end;

  /// <summary>Published text object appearance</summary>
  TTextObjectAppearance = class(TCustomTextObjectAppearance)
  published
    property Font stored IsFontStored nodefault;
    property TextAlign stored IsTextAlignStored nodefault;
    property TextVertAlign stored IsTextVertAlignStored nodefault;
    property WordWrap stored IsWordWrapStored nodefault;
    property TextShadow stored IsTextShadowStored nodefault;
    property TextColor stored IsTextColorStored nodefault;
    property Trimming stored IsTrimmingStored nodefault;
    // Common
    property Width stored IsWidthStored nodefault;
    property Height stored IsHeightStored nodefault;
    property Align stored IsAlignStored nodefault;
    property VertAlign stored IsVertAlignStored nodefault;
    property Visible stored IsVisibleStored nodefault;
    property PlaceOffset stored IsPlaceOffsetStored nodefault;
    property Opacity stored IsOpacityStored nodefault;
  end;

  /// <summary>Image object appearance, e.g. item bitmap</summary>
  TCustomImageObjectAppearance = class(TCommonObjectAppearance)
  strict private var
    FScalingMode: TImageScalingMode;
    procedure SetScalingMode(const Value: TImageScalingMode);
  private
    function GetDefaultValues: TCustomImageObjectAppearance;
  protected
    procedure AssignTo(ADest: TPersistent); override;
    function CreateDefaultValues: TObjectAppearance; override;
    function IsOpacityStored: Boolean;
    function IsScalingModeStored: Boolean;
  public
    constructor Create; override;
    procedure CreateObject(const AListViewItem: TListViewItem); override;
    procedure ResetObject(const AListViewItem: TListViewItem); override;
    property ScalingMode: TImageScalingMode read FScalingMode write SetScalingMode;
    property DefaultValues: TCustomImageObjectAppearance read GetDefaultValues;
  end;

  /// <summary>Published image object appearance</summary>
  TImageObjectAppearance = class(TCustomImageObjectAppearance)
  published
    property ScalingMode stored IsScalingModeStored nodefault;
    // Common
    property Width stored IsWidthStored nodefault;
    property Height stored IsHeightStored nodefault;
    property Align stored IsAlignStored nodefault;
    property VertAlign stored IsVertAlignStored nodefault;
    property Visible stored IsVisibleStored nodefault;
    property PlaceOffset stored IsPlaceOffsetStored nodefault;
    property Opacity stored IsOpacityStored nodefault;
  end;

  /// <summary>Accessory object appearance: more, disclosure, checkmark</summary>
  TCustomAccessoryObjectAppearance = class(TCommonObjectAppearance)
  strict private var
    FAccessoryType: TAccessoryType;
    procedure SetAccessoryType(const Value: TAccessoryType);
  private
    function GetDefaultValues: TCustomAccessoryObjectAppearance;
  protected
    procedure AssignTo(ADest: TPersistent); override;
    function CreateDefaultValues: TObjectAppearance; override;
    function IsAccessoryTypeStored: Boolean;
  public
    constructor Create; override;
    procedure CreateObject(const AListViewItem: TListViewItem); override;
    procedure ResetObject(const AListViewItem: TListViewItem); override;
    property AccessoryType: TAccessoryType read FAccessoryType write SetAccessoryType;
    property DefaultValues: TCustomAccessoryObjectAppearance read GetDefaultValues;
  end;

  /// <summary>Published accessory object appearance</summary>
  TAccessoryObjectAppearance = class(TCustomAccessoryObjectAppearance)
  published
    property AccessoryType  stored IsAccessoryTypeStored nodefault;
    // Common
    property Width stored IsWidthStored nodefault;
    property Height stored IsHeightStored nodefault;
    property Align stored IsAlignStored nodefault;
    property VertAlign stored IsVertAlignStored nodefault;
    property Visible stored IsVisibleStored nodefault;
    property PlaceOffset stored IsPlaceOffsetStored nodefault;
    property Opacity stored IsOpacityStored nodefault;
  end;

  /// <summary>Text button object appearance: text button that can be embedded in <c>TListItem</c></summary>
  TCustomTextButtonObjectAppearance = class(TCommonObjectAppearance)
  strict private var
    FButtonType: TTextButtonType;
    procedure SetButtonType(const Value: TTextButtonType);
  private
    FOnControlClick: TNotifyEvent;
    FOnControlChange: TNotifyEvent;
    FText: string;
    FFont: TFont;
    FTrimming: TTextTrimming;
    FTextVertAlign: TTextAlign;
    FTextAlign: TTextAlign;
    FWordWrap: Boolean;
    FTextColor: TAlphaColor;
    FTintColor: TAlphaColor;
    FPressedTextColor: TAlphaColor;
    FTextShadowColor: TAlphaColor;
    FEnabled: Boolean;
    FHasButtonText: Boolean;
    function GetDefaultValues: TCustomTextButtonObjectAppearance;
    procedure SetText(const Value: string);
    procedure SetFont(const Value: TFont);
    procedure SetTextAlign(const Value: TTextAlign);
    procedure SetTextVertAlign(const Value: TTextAlign);
    procedure SetTrimming(const Value: TTextTrimming);
    procedure SetWordWrap(const Value: Boolean);
    procedure FontChanged(Sender: TObject);
    procedure SetPressedTextColor(const Value: TAlphaColor);
    procedure SetTextColor(const Value: TAlphaColor);
    procedure SetTintColor(const Value: TAlphaColor);
    procedure SetTextShadowColor(const Value: TAlphaColor);
    procedure SetEnabled(const Value: Boolean);
  protected
    procedure AssignTo(ADest: TPersistent); override;
    function CreateDefaultValues: TObjectAppearance; override;
    function IsButtonTypeStored: Boolean;
    function IsTextStored: Boolean;
    function IsTrimmingStored: Boolean;
    function IsFontStored: Boolean;
    function IsTextAlignStored: Boolean;
    function IsTextColorStored: Boolean;
    function IsTintColorStored: Boolean;
    function IsPressedTextColorStored: Boolean;
    function IsTextShadowColorStored: Boolean;
    function IsTextVertAlignStored: Boolean;
    function IsWordWrapStored: Boolean;
    function IsEnabledStored: Boolean;
    procedure DoControlClick(Sender: TObject); virtual;
    procedure DoControlChange(Sender: TObject); virtual;
  public
    constructor Create; override;
    destructor Destroy; override;
    procedure CreateObject(const AListViewItem: TListViewItem); override;
    procedure ResetObject(const AListViewItem: TListViewItem); override;
    property ButtonType: TTextButtonType read FButtonType write SetButtonType;
    property Enabled: Boolean read FEnabled write SetEnabled;
    property Text: string read FText write SetText;
    property Trimming: TTextTrimming read FTrimming write SetTrimming;
    property Font: TFont read FFont write SetFont;
    property TextColor: TAlphaColor read FTextColor write SetTextColor;
    property TintColor: TAlphaColor read FTintColor write SetTintColor;
    property PressedTextColor: TAlphaColor read FPressedTextColor write SetPressedTextColor;
    property TextShadowColor: TAlphaColor read FTextShadowColor write SetTextShadowColor;
    // Horizontal text alignment inside local item rectangle.
    property TextAlign: TTextAlign read FTextAlign write SetTextAlign;
    // Vertical text alignment inside local item rectangle.
    property TextVertAlign: TTextAlign read FTextVertAlign write SetTextVertAlign;
    property WordWrap: Boolean read FWordWrap write SetWordWrap;
    property DefaultValues: TCustomTextButtonObjectAppearance read GetDefaultValues;
    property OnControlClick: TNotifyEvent read FOnControlClick write FOnControlClick;
    property OnControlChange: TNotifyEvent read FOnControlChange write FOnControlChange;
  end;

  /// <summary>Text button object appearance: text button that can be embedded in <c>TListItem</c></summary>
  TTextButtonObjectAppearance = class(TCustomTextButtonObjectAppearance)
  published
    property ButtonType  stored IsButtonTypeStored nodefault;
    property Trimming stored IsTrimmingStored nodefault;
    property Font stored IsFontStored nodefault;
    property Enabled stored IsEnabledStored nodefault;
    property TextAlign stored IsTextAlignStored nodefault;
    property TextVertAlign stored IsTextVertAlignStored nodefault;
    property WordWrap stored IsWordWrapStored nodefault;
    property TextColor stored IsTextColorStored nodefault;
    property TintColor stored IsTintColorStored nodefault;
    property PressedTextColor stored IsPressedTextColorStored nodefault;
    property TextShadowColor stored IsTextShadowColorStored nodefault;
    // Common
    property Width stored IsWidthStored nodefault;
    property Height stored IsHeightStored nodefault;
    // property Height stored IsHeightStored nodefault;  // Not adjustable
    property Align stored IsAlignStored nodefault;
    property VertAlign stored IsVertAlignStored nodefault;
    property Visible stored IsVisibleStored nodefault;
    property PlaceOffset stored IsPlaceOffsetStored nodefault;
    property Opacity stored IsOpacityStored nodefault;
    property Text stored IsTextStored nodefault;
  end;

  /// <summary>Glyph button appearance: checkmark, add, delete</summary>
  TCustomGlyphButtonObjectAppearance = class(TCommonObjectAppearance)
  strict private var
    FButtonType: TGlyphButtonType;
    FEnabled: Boolean;
    procedure SetButtonType(const Value: TGlyphButtonType);
  private
    FOnControlClick: TNotifyEvent;
    FOnControlChange: TNotifyEvent;
    FClickOnSelect: Boolean;
    function GetDefaultValues: TCustomGlyphButtonObjectAppearance;
    procedure SetClickOnSelect(const AValue: Boolean);
    procedure SetEnabled(const Value: Boolean);
  protected
    procedure AssignTo(ADest: TPersistent); override;
    function CreateDefaultValues: TObjectAppearance; override;
    function IsButtonTypeStored: Boolean;
    function IsEnabledStored: Boolean;
    function IsClickOnSelectStored: Boolean;
    procedure DoControlClick(Sender: TObject); virtual;
    procedure DoControlChange(Sender: TObject); virtual;
  public
    constructor Create; override;
    procedure CreateObject(const AListViewItem: TListViewItem); override;
    procedure ResetObject(const AListViewItem: TListViewItem); override;
    property ButtonType: TGlyphButtonType read FButtonType write SetButtonType;
    property Enabled: Boolean read FEnabled write SetEnabled;
    property ClickOnSelect: Boolean read FClickOnSelect write SetClickOnSelect;
    property DefaultValues: TCustomGlyphButtonObjectAppearance read GetDefaultValues;
    property OnControlClick: TNotifyEvent read FOnControlClick write FOnControlClick;
    property OnControlChange: TNotifyEvent read FOnControlChange write FOnControlChange;
  end;

  /// <summary>Glyph button appearance: checkmark, add, delete</summary>
  TGlyphButtonObjectAppearance = class(TCustomGlyphButtonObjectAppearance)
  published
    property ButtonType  stored IsButtonTypeStored nodefault;
    property Enabled stored IsEnabledStored nodefault;
    property ClickOnSelect stored IsClickOnSelectStored nodefault;
    // Common
    property Width stored IsWidthStored nodefault;
    property Height stored IsHeightStored nodefault;
    property Align stored IsAlignStored nodefault;
    property VertAlign stored IsVertAlignStored nodefault;
    property Visible stored IsVisibleStored nodefault;
    property PlaceOffset stored IsPlaceOffsetStored nodefault;
    property Opacity stored IsOpacityStored nodefault;
  end;

  TAppearanceObjects = class abstract (TPersistent)
  public type
    TControlEvent = procedure(const Sender: TObject; const AControl: TListItemSimpleControl) of object;
    TCreatingObjectsEvent = procedure(const Sender: TObject; const AListViewItem: TListViewItem; var AHandled: Boolean) of object;
    TCreateObjectsEvent = procedure(const Sender: TObject; const AListViewItem: TListViewItem) of object;
  private const
    cDefaultHeight = 44;
    cDefaultHeaderHeight = 24;
  strict private
    [Weak] FOwnerControl: TControl;
    FResources: IListItemStyleResources;
  private
    FOnChange: TNotifyEvent;
    FOnChangeHeight: TNotifyEvent;
    FOnButtonClick: TItemControlEvent;
    FOnButtonChange: TItemControlEvent;
    function GetHeight: Integer; virtual;
    procedure SetHeight(Value: Integer); virtual;
    procedure TakeOwnership(const NewOwner: TControl);
  protected
    procedure ItemPropertyChange(Sender: TObject);
    procedure DoChange; virtual;
    procedure DoChangeHeight; virtual;
    procedure AssignTo(ADest: TPersistent); override;
    procedure UpdateSizes(const FinalSize: TSizeF); virtual;
    function DefaultHeight: Integer; virtual;
    function GetPublishedObjects: TArray<TCommonObjectAppearance>; virtual;
    function GetObjects: TArray<TCommonObjectAppearance>; virtual;
    // For custom appearances to read/write TAppearanceListViewItem.Data
    procedure SetObjectData(const AListViewItem: TListViewItem; const AIndex: string; const AValue: TValue; var AHandled: Boolean); virtual;
    function StyleResourcesNeedUpdate: Boolean;
    function GetStyleResources: TListItemStyleResources;
    property OwnerControl: TControl read FOwnerControl;
  public
    constructor Create(const Owner: TControl); virtual;
    /// <summary>Initialize view ("objects") of specified TListViewItem using objects of this Appearance. If
    /// the view is already initialized, it will be fully updated.</summary>
    procedure ResetObjects(const AListViewItem: TListViewItem; const FinalSize: TSizeF); virtual;
    property Height: Integer read GetHeight write SetHeight;
    procedure BeginUpdate;
    procedure EndUpdate;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    property OnChangeHeight: TNotifyEvent read FOnChangeHeight write FOnChangeHeight;
    property Objects: TArray<TCommonObjectAppearance> read GetObjects;
    property PublishedObjects: TArray<TCommonObjectAppearance> read GetPublishedObjects;
    property OnButtonClick: TItemControlEvent write FOnButtonClick;
    property OnButtonChange: TItemControlEvent write FOnButtonChange;
  end;

  // Includes Text, Detail, etc.
  TItemAppearanceObjects = class(TAppearanceObjects)
  private const
    cDefaultHeight = TAppearanceObjects.cDefaultHeight;
  strict private
    FText: TTextObjectAppearance;
    FDetail: TTextObjectAppearance;
    FImage: TImageObjectAppearance;
    FAccessory: TAccessoryObjectAppearance;
    FTextButton: TTextButtonObjectAppearance;
    FGlyphButton: TGlyphButtonObjectAppearance;
    FHeight: Integer;
    FObjects: TArray<TCommonObjectAppearance>;
    FPublishedObjects: TArray<TCommonObjectAppearance>;
    procedure SetAccessoryElement(const Value: TAccessoryObjectAppearance);
    procedure SetTextButtonElement(const Value: TTextButtonObjectAppearance);
    procedure SetGlyphButtonElement(const Value: TGlyphButtonObjectAppearance);
    procedure SetImageElement(const Value: TImageObjectAppearance);
    procedure SetTextElement(const Value: TTextObjectAppearance);
    procedure SetDetailElement(const Value: TTextObjectAppearance);
  protected
    procedure AssignTo(ADest: TPersistent); override;
    function GetHeight: Integer; override;
    procedure SetHeight(Value: Integer); override;
    function DefaultHeight: Integer; override;
    function GetPublishedObjects: TArray<TCommonObjectAppearance>; override;
    procedure AddObject(const AObjectAppearance: TCommonObjectAppearance; APublished: Boolean);
    /// <summary>Search Objects and PublishedObjects for an object with the same name as that of given
    /// AObjectAppearance and replace them with it. If not found, append.</summary>
    function UpdateObject(const AObjectAppearance: TCommonObjectAppearance; APublished: Boolean):
      TCommonObjectAppearance;
    /// <summary>Remove given AObjectAppearance from Objects and PublishedObjects</summary>
    procedure RemoveObject(const AObjectAppearance: TCommonObjectAppearance);
    function GetObjects: TArray<TCommonObjectAppearance>; override;
  public
    constructor Create(const Owner: TControl); overload; override;
    destructor Destroy; override;
    property Text: TTextObjectAppearance read FText write SetTextElement;
    property Detail: TTextObjectAppearance read FDetail write SetDetailElement;
    property Image: TImageObjectAppearance read FImage write SetImageElement;
    property Accessory: TAccessoryObjectAppearance read FAccessory write SetAccessoryElement;
    property TextButton: TTextButtonObjectAppearance read FTextButton write SetTextButtonElement;
    property GlyphButton: TGlyphButtonObjectAppearance read FGlyphButton write SetGlyphButtonElement;
  end;
  TItemAppearanceObjectsClass = class of TItemAppearanceObjects;
{$ENDREGION}

  TRegisterAppearanceOption = (Footer, Header, Item, ItemEdit, DefaultFooter, DefaultHeader, DefaultItem, DefaultItemEdit);
  TRegisterAppearanceOptions = set of TRegisterAppearanceOption;
  TRegisteredAppearance = record
    Name: string;
    Value: TItemAppearanceObjectsClass;
    UnitName: string;
    Options: TRegisterAppearanceOptions;
  end;

  ///<summary>Represents properties of Item Appearance that define geometric properties of the entire ListViewItem,
  /// specify AppearanceClass and AppearanceClassName that define Item Appearance Objects that comprise item's view.
  /// </summary>
  TItemAppearanceProperties = class(TInterfacedPersistent, IDesignablePersistent, ISpriggedPersistent)
  public type
    TControlEvent = TAppearanceObjects.TControlEvent;
    TItemAppearanceObjectsClass = TItemAppearanceObjectsClass;
    TAppearancePropertiesEvent = procedure(const Sender: TItemAppearanceProperties) of object;
  public const
    cDefaultHeight = TAppearanceObjects.cDefaultHeight;
  strict private
    FOwnerControl: TControl;
    FName: string;
    FAppearanceType: TAppearanceType;
    FAppearanceCache: TDictionary<TItemAppearanceObjectsClass, TItemAppearanceObjects>;
    FAppearance: TItemAppearanceObjects;
    FAppearanceClass: TItemAppearanceObjectsClass;
    FPurpose: TListItemPurpose;
    FPropertiesOwner: IPublishedAppearanceOwner;
    FOnChange: TNotifyEvent;
    FOnDestroy: TNotifyEvent;
    FSprig: TPersistent;
    FShim: IPersistentShim;

    procedure SetName(const Value: string);
    procedure SetObjects(const Value: TItemAppearanceObjects);
    procedure PropertiesChange(Sender: TObject);
    procedure PropertiesChangeHeight(Sender: TObject);
    function GetHeight: Integer;
    procedure SetHeight(AValue: Integer);
    procedure SetAppearanceClass(const Value: TItemAppearanceObjectsClass);
    function GetAppearanceClassName: string;
    procedure SetAppearanceClassName(const Value: string);
    function GetActive: Boolean;
    function PropertiesOwner: IPublishedAppearanceOwner;

    { IDesignableAppearance }
    function GetBoundsRect: TRect;
    function GetDesignParent: TPersistent;

    procedure BindShim(AShim: IPersistentShim);
    procedure UnbindShim;
    procedure IDesignablePersistent.Bind = BindShim;
    procedure IDesignablePersistent.Unbind = UnbindShim;
    function BeingDesigned: Boolean;

    procedure SetSprig(const APersistent: TPersistent);
    function GetSprig: TPersistent;
  protected
    /// <summary>Notify PropertiesOwner of change in its Item Appearance Properties and invoke
    /// FOnChange event if it is assigned.</summary>
    procedure DoChange; virtual;
    /// <summary>Notify PropertiesOwner of item height change</summary>
    procedure DoChangeHeight; virtual;
    /// <summary>Notify PropertiesOwner that the objects that comprise the appearance represented by these
    ///  properties have been changed</summary>
    procedure DoChangeObjects; virtual;
    /// <summary>True if the Height property is user modified</summary>
    function IsHeightStored: Boolean;
  public
    constructor Create(const Owner: TControl; AType: TAppearanceType);
    destructor Destroy; override;
    /// <summary>Owner control for property editors. The host TListView.</summary>
    property Owner: TControl read FOwnerControl;
    /// <summary>Item purpose: None (regular), Header, Footer.</summary>
    property Purpose: TListItemPurpose read FPurpose;
    /// <summary>The class that defines objects that comprise item appearance. E.g. TListItemAppearance. See also
    /// AppearanceClassName.</summary>
    property AppearanceClass: TItemAppearanceObjectsClass read FAppearanceClass write SetAppearanceClass;
    /// <summary>AppearanceClass name. The class with given name will be searched in TAppearancesRegistry
    /// and if found, used to intialize appearance.</summary>
    property AppearanceClassName: string read GetAppearanceClassName write SetAppearanceClassName;
    /// <summary>Indicates that this appearance is currently active. EditMode appearance will be inactive in regular
    /// mode and active when ListView is in Edit Mode. The opposite is true for regular Item Appearances.</summary>
    property Active: Boolean read GetActive;
    /// <summary>Display name for this Item Appearance</summary>
    property Name: string read FName write SetName stored False;
    /// <summary>Specifies Item Height.</summary>
    property Height: Integer read GetHeight write SetHeight;
    /// <summary>Appearance Item Objects that comprise this Item Appearance, e.g. 'Text', 'Image', etc</summary>
    property Objects: TItemAppearanceObjects read FAppearance write SetObjects;  // Objects is published name of Appearance
    /// <summary>Appearance type: (Item, ItemEdit, Header, Footer)</summary>
    property AppearanceType: TAppearanceType read FAppearanceType;
    /// <summary>Event to be invoked when these change</summary>
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    /// <summary>Event to be invoked when is instance is being destroyed</summary>
    property OnDestroy: TNotifyEvent read FOnDestroy write FOnDestroy;
  end;

  // Does not create objects
  TEmptyItemObjects = class(TItemAppearanceObjects)
  private const
    cDefaultHeight = TAppearanceObjects.cDefaultHeight;
  private var
    FHeight: Integer;
  protected
    procedure SetHeight(Value: Integer); override;
    function GetHeight: Integer; override;
    function DefaultHeight: Integer; override;
  public
    constructor Create(const Owner: TControl); override;
  end;

  // Disables all services for managing TAppearanceListViewItem.Objects, such as creating and resizing
  TNullItemObjects = class(TEmptyItemObjects)
  end;

  // Set some defaults on Text, Detail, etc.
  TCustomItemObjects = class(TItemAppearanceObjects)
  public const
    cDefaultHeight = TAppearanceObjects.cDefaultHeight;
    cDefaultButtonHeight = 31;
    cDefaultTextButtonWidth = 64;
    cDefaultImageWidth = 29;
    cDefaultImageHeight = 29;
    cDefaultImageTextPlaceOffsetX = 10;
    cDefaultGlyphPlaceOffsetX = -6;
  protected
    procedure UpdateSizes(const FinalSize: TSizeF); override;
    procedure SetInternalSize(const AGlyphButton: TGlyphButtonObjectAppearance;
      AStyleResources: TListItemStyleResources); overload;
    procedure SetInternalSize(const AAccessory: TAccessoryObjectAppearance;
      AStyleResources: TListItemStyleResources); overload;
    function DefaultHeight: Integer; override;
  public
    constructor Create(const Owner: TControl); override;
    property Text;
    property Detail;
    property Image;
    property Accessory;
    property TextButton;
    property GlyphButton;
  end;

  // Base class for item object presets
  TPresetItemObjects = class(TCustomItemObjects)
  public type
    TGroupClass = class of TPresetItemObjects;
  protected
    // Identify the ancestor class that supports resetobjects
    function GetGroupClass: TGroupClass; virtual;
    // Indicate if this is an itemedit appearance
    function GetIsItemEdit: Boolean; virtual;
    property IsItemEdit: Boolean read GetIsItemEdit;
    property GroupClass: TGroupClass read GetGroupClass;
  public
    procedure ResetObjects(const AListViewItem: TListViewItem; const FinalSize: TSizeF); override;
  end;

  /// <summary>Represents appearance in the object inspector: appearance names for all item purposes and
  /// item heights</summary>
  TPublishedAppearance = class(TPersistent)
  strict private
    FOwnerComponent: TComponent;
    FPropertiesOwner: IPublishedAppearanceOwner;

    function GetFooterAppearance: string;
    function GetFooterHeight: Integer;
    function GetHeaderAppearance: string;
    function GetHeaderHeight: Integer;
    function GetItemAppearance: string;
    function GetItemEditAppearance: string;
    function GetItemHeight: Integer;
    function GetItemEditHeight: Integer;
    procedure SetFooterAppearance(const Value: string);
    procedure SetFooterHeight(const Value: Integer);
    procedure SetHeaderAppearance(const Value: string);
    procedure SetHeaderHeight(const Value: Integer);
    procedure SetItemAppearance(const Value: string);
    procedure SetItemEditAppearance(const Value: string);
    procedure SetItemHeight(const Value: Integer);
    procedure SetItemEditHeight(const Value: Integer);
    function IsFooterHeightStored: Boolean;
    function IsHeaderHeightStored: Boolean;
    function IsItemEditHeightStored: Boolean;
    function IsItemHeightStored: Boolean;
  published
    constructor Create(const AOwner: TComponent);
    property Owner: TComponent read FOwnerComponent;
    property ItemHeight: Integer read GetItemHeight write SetItemHeight stored IsItemHeightStored nodefault;
    property ItemEditHeight: Integer read GetItemEditHeight write SetItemEditHeight stored IsItemEditHeightStored nodefault;
    property HeaderHeight: Integer read GetHeaderHeight write SetHeaderHeight stored IsHeaderHeightStored nodefault;
    property FooterHeight: Integer read GetFooterHeight write SetFooterHeight stored IsFooterHeightStored nodefault;
    property ItemAppearance: string read GetItemAppearance write SetItemAppearance stored False;
    property ItemEditAppearance: string read GetItemEditAppearance write SetItemEditAppearance stored False;
    property HeaderAppearance: string read GetHeaderAppearance write SetHeaderAppearance stored False;
    property FooterAppearance: string read GetFooterAppearance write SetFooterAppearance stored False;
  end;

  /// <summary>Represents appearance items (collections of objects comprising appearances)
  /// in the object inspector</summary>
  TPublishedObjects = class(TPersistent)
  private
    FOwner: IPublishedAppearanceOwner;

    function GetFooterObjects: TItemAppearanceObjects;
    function GetHeaderObjects: TItemAppearanceObjects;
    function GetItemEditObjects: TItemAppearanceObjects;
    function GetItemObjects: TItemAppearanceObjects;
    procedure SetFooterObjects(const Value: TItemAppearanceObjects);
    procedure SetHeaderObjects(const Value: TItemAppearanceObjects);
    procedure SetItemEditObjects(const Value: TItemAppearanceObjects);
    procedure SetItemObjects(const Value: TItemAppearanceObjects);
  published
    constructor Create(const AOwner: IPublishedAppearanceOwner);
    property ItemObjects: TItemAppearanceObjects read GetItemObjects write SetItemObjects;
    property ItemEditObjects: TItemAppearanceObjects read GetItemEditObjects write SetItemEditObjects;
    property HeaderObjects: TItemAppearanceObjects read GetHeaderObjects write SetHeaderObjects;
    property FooterObjects: TItemAppearanceObjects read GetFooterObjects write SetFooterObjects;
  end;

  /// <summary>Registered appearance descriptor used in TAppearancesRegistry</summary>
  TRegisterAppearanceValue = record
    /// <summary>Appearance name</summary>
    Name: string;
    /// <summary>Appearance unit name</summary>
    UnitName: string;
    /// <summary>Appearance options: Footer, Header, Item, ItemEdit, DefaultFooter,
    /// DefaultHeader, DefaultItem, DefaultItemEdit</summary>
    Options: TRegisterAppearanceOptions;
    constructor Create(const AName: string; AOptions: TRegisterAppearanceOptions; const AUnitName: string);
  end;

  /// <summary>Global registry of Item Appearances</summary>
  TAppearancesRegistry = class
    private class var
      FFactories: TDictionary<TItemAppearanceObjectsClass, TRegisterAppearanceValue>;
    public const
      cRegisterDefault = [TRegisterAppearanceOption.DefaultFooter, TRegisterAppearanceOption.DefaultHeader,
        TRegisterAppearanceOption.DefaultItem, TRegisterAppearanceOption.DefaultItemEdit];
      cRegisterAll = [
        TRegisterAppearanceOption.Footer, TRegisterAppearanceOption.Header,  TRegisterAppearanceOption.Item,
        TRegisterAppearanceOption.ItemEdit, TRegisterAppearanceOption.DefaultFooter,
        TRegisterAppearanceOption.DefaultHeader,  TRegisterAppearanceOption.DefaultItem,
        TRegisterAppearanceOption.DefaultItemEdit];
    class constructor Create;
    class destructor Destroy;
    /// <summary>Register appearances from an array</summary>
    class procedure RegisterAppearances(AFactories: TArray<TItemAppearanceObjectsClass>; ADisplayNames: TArray<string>;
      AOptions: TRegisterAppearanceOptions = [TRegisterAppearanceOption.Item]; const AUnitName: string = ''); overload;
    /// <summary>Register a single appearance</summary>
    class procedure RegisterAppearance(const AFactory: TItemAppearanceObjectsClass; const ADisplayName: string;
      AOptions: TRegisterAppearanceOptions = [TRegisterAppearanceOption.Item]; const AUnitName: string = ''); overload;
    /// <summary>Unregister an item appearance</summary>
    class procedure UnregisterAppearance(const AFactory: TItemAppearanceObjectsClass); overload;
    /// <summary>Unregister appearances from an array</summary>
    class procedure UnregisterAppearances(AFactories: TArray<TItemAppearanceObjectsClass>); overload;
    /// <summary>Get registered appearances, filtered by kind. See TRegisterAppearanceOption</summary>
    class function GetRegisteredAppearances(AFilter: TRegisterAppearanceOptions = []): TArray<TRegisteredAppearance>;
    /// <summary>Find TItemAppearanceObjectsClass by option.
    /// See TRegisterAppearanceOption, TItemAppearanceObjectsClass </summary>
    class function FindItemAppearanceObjectsClassByOption(AOption: TRegisterAppearanceOption): TItemAppearanceObjectsClass;
  end;

//== INTERFACE END: FMX.ListView.Appearances
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.ListView.DynamicAppearance (from FMX.ListView.DynamicAppearance.pas)
//==================================================================================================


type
  TDynamicAppearance = class;

  /// <summary>
  /// TAppearanceObjectItem is an item in TAppearanceObjectItemCollection with
  /// AppearanceObjectName, AppearanceObjectClassName and the object itself (Appearance).
  /// </summary>
  TAppearanceObjectItem = class(TCollectionItem)
  private const
    FObjectAppearanceClassNames: array [0..4] of TClass = (TTextObjectAppearance, TImageObjectAppearance,
      TTextButtonObjectAppearance, TGlyphButtonObjectAppearance, TAccessoryObjectAppearance);
  private
    [Weak] FOwner: TDynamicAppearance;
    FAppearance: TCommonObjectAppearance;
    FAppearanceClass: TClass;
    FObjectName: string;
    procedure SetAppearanceClass(Value: TClass);
    procedure SetAppearance(Value: TCommonObjectAppearance);

    function GetObjectName: string;
    procedure SetObjectName(Value: string);

    function GetClassName: string;
    procedure SetClassName(Value: string);
  public
    procedure Assign(Source: TPersistent); override;
    constructor Create(Collection: TCollection); override;
    destructor Destroy; override;
  published
    ///<summary>Name of this appearance object, e.g. 'text'</summary>
    property AppearanceObjectName: string read GetObjectName write SetObjectName nodefault;
    ///<summary>Class name of this appearance object, e.g. TTextObjectAppearance</summary>
    property AppearanceClassName: string read GetClassName write SetClassName nodefault;
    ///<summary>Object appearance itself</summary>
    property Appearance: TCommonObjectAppearance read FAppearance write SetAppearance;
  end;

  ///<summary>Collection of Items representing Appearance Objects that comprise a dynamic appearance.</summary>
  TAppearanceObjectItemCollection = class(TOwnedCollection)
  private
    [Weak] FDynamicAppearance: TDynamicAppearance;
  protected
    procedure Notify(Item: TCollectionItem; Action: TCollectionNotification); override;
    { Design }
    function GetAttrCount: Integer; override;
    function GetAttr(Index: Integer): string; override;
    function GetItemAttr(Index, ItemIndex: Integer): string; override;
  public
    ///<summary>Create new TAppearanceObjectItemCollection for specified DynamicAppearance</summary>
    constructor Create(Owner: TComponent; DynamicAppearance: TDynamicAppearance); reintroduce;
    procedure BeginUpdate; override;
    procedure EndUpdate; override;
  end;

  ///<summary>User-defined, designable ListView Item appearance. This class is one of the items
  ///that can be selected in the Object Inspector as an item appearance for Header, Item and Footer.
  ///
  ///Unlike static appearances, the objects in this one are stored in a collection. The collection can be
  ///filled with any combination of objects, which can then be edited in the designer to create fully
  ///customized item look.</summary>
  TDynamicAppearance = class(TPresetItemObjects)
  strict private
    FObjectsCollection: TCollection;
  protected
    function GetGroupClass: TPresetItemObjects.TGroupClass; override;

    function GetObjectsCollection: TCollection;
    procedure SetObjectsCollection(Value: TCollection);

    ///<summary>Create new Object Apperance specified by AppearanceClass and Name and initialize Item.Appearance
    ///with it.</summary>
    procedure CreateObjectAppearance(const AppearanceClass: TClass; const Name: string; const Item: TAppearanceObjectItem);
    ///<summary>Initialize DataMember for given ObjectAppearance. The expression is Data[ObjectAppearance.Name].</summary>
    procedure InitDataMember(const ObjectAppearance: TCommonObjectAppearance);
    ///<summary>Invoked when an appearance object is modified</summary>
    procedure ObjectPropertyChange(Sender: TObject);
    ///<summary>Invoked when an appearance object is renamed</summary>
    procedure ObjectRenamed(const Sender: TCommonObjectAppearance; const OldName: string);
    ///<summary>Propagate change notification up. Used by ObjectRemoving, ObjectAdded.</summary>
    procedure ItemAppearanceChange;
    ///<summary>Called when item is removed from the ObjectsCollection</summary>
    procedure ObjectRemoving(const Value: TCommonObjectAppearance);
    ///<summary>Called when item is added to the ObjectsCollection</summary>
    procedure ObjectAdded(const Value: TCommonObjectAppearance);
  public
    constructor Create(const Owner: TControl); override;
    destructor Destroy; override;
  published
    ///<summary>Collection of Object Appearances that comprise this Item Appearance</summary>
    property ObjectsCollection: TCollection read GetObjectsCollection write SetObjectsCollection;
  end;

//== INTERFACE END: FMX.ListView.DynamicAppearance
//==================================================================================================

//==================================================================================================
//== INTERFACE START: FMX.ListView (from FMX.ListView.pas)
//==================================================================================================

{$SCOPEDENUMS ON}


type
  /// <summary>List view class that provides members that subclasses may use to
  /// communicate with a list view adapter that contains the actual items of the
  /// list view.</summary>
  TAdapterListView = class(TStyledControl)
  strict private
    FAdapter: IListViewAdapter;
    FHeightSumsNeedUpdate: Boolean;

    procedure ItemsMayChange(Sender: TObject);
    procedure ItemsCouldHaveChanged(Sender: TObject);
    procedure ItemsChange(Sender: TObject);
    procedure ItemsResize(Sender: TObject);
    procedure ItemsInvalidate(Sender: TObject);
    procedure ResetView(Sender: TObject);
  protected
    /// <summary>Called after the adapter had been set, <see cref='SetAdapter'>SetAdapter</see></summary>
    procedure DoAdapterSet; virtual;
    /// <summary>Set <see cref='FMX.ListView.Types.IListViewAdapter'>IListViewAdapter</see></summary>
    procedure SetAdapter(Adapter: IListViewAdapter);
    /// <summary>Request update of item heights</summary>
    procedure InvalidateHeights;
    /// <summary>Handler of <see cref='IListViewAdapter.OnChanged>IListViewAdapter.OnChanged</see></summary>
    procedure DoItemsChange; virtual;
    /// <summary>Handler of
    /// <see cref='IListViewAdapter.OnItemsMayChange'>IListViewAdapter.OnItemsMayChange</see></summary>
    procedure DoItemsMayChange; virtual;
    /// <summary>Handler of
    /// <see cref='IListViewAdapter.OnItemsCouldHaveChanged'>IListViewAdapter.OnItemsCouldHaveChanged</see></summary>
    procedure DoItemsCouldHaveChanged; virtual;
    /// <summary>Handler of <see cref='IListViewAdapter.OnItemsResize'>IListViewAdapter.OnItemsResize</see></summary>
    procedure DoItemsResize; virtual;
    /// <summary>Handler of
    /// <see cref='IListViewAdapter.OnItemsInvalidate'>IListViewAdapter.OnItemsInvalidate</see></summary>
    procedure DoItemsInvalidate; virtual;
    /// <summary>Handler of
    /// <see cref='IListViewAdapter.OnResetView'>IListViewAdapter.OnResetView</see></summary>
    procedure DoResetView(const Sender: TListItem); virtual;
    /// <summary><c>True</c> if update of item height cache is required. Set by <c>InvalidateHeights</c></summary>
    property HeightSumsNeedUpdate: Boolean read FHeightSumsNeedUpdate write FHeightSumsNeedUpdate;
  public
    /// <summary><c>IListViewAdapter</c> providing contents of this <c>TAdapterListView</c></summary>
    property Adapter: IListViewAdapter read FAdapter write SetAdapter;
  end;

  /// <summary>The minimal ListView that's actually a real UI control. It implements all scrolling and drawing
  /// functionality. It needs a valid IListViewAdapter to provide item views;
  /// see <see cref='TAdapterListView.Adapter'>TAdapterListView.Adapter</see></summary>
  ///
  /// <remarks>
  /// Implements:
  ///  <para><c>ISearchResponder</c> enables setting a filter predicate</para>
  ///  <para><c>IListItemStyleResources</c> access to style resources</para>
  ///  <para><c>IListViewController</c> mediator protocol between <c>TListView</c> and <c>TListItem</c></para>
  ///  <para><c>IGlyph</c> interface to <c>TImageList</c></para>
  ///  <para><c>IMessageSendingCompatible</c> TMessageSender object for FMX.Presentation compatibility</para>
  /// </remarks>
  TListViewBase = class(TAdapterListView, ISearchResponder, IListItemStyleResources, IListViewController, IGlyph,
    IMessageSendingCompatible, IControlTypeSupportable)
  private const
    ChangeRepaintedIncidentDelay = 0.1; // seconds
    PhysicsProcessingInterval = 8; // 8 ms for ~120 frames per second
    RecurrentTimerInterval = 16; // 16 ms for ~60 frames per second
    AutoTapScrollingSpeed = 8; // pixels per frame
    AutoTapMaxScrollingTime = 1; // seconds
    TapSelectWaitTime = 0.25; // seconds
    SelectionFadeInTime = 0.125; // seconds
    SelectionFadeOutTime = 0.25; // seconds
    MinScrollThreshold = 10;
    MinSwypeThreshold = 40;

    DefaultDeleteButtonWidth = 72;

    ItemSeparatorTop = 1;
    ItemSeparatorBottom = 2;

    EditModeSelectionAlpha = 0.25; // how bright the checked items are in editmode

    EditModeAnimationDuration = 0.1; // in seconds
    DeleteModeAnimationDuration = 0.15; // in seconds
    DefaultDeleteButtonText = 'Delete';

    PullRefreshIndicatorStrengthStart = 16;
    PullRefreshIndicatorMaxSteps = 12;

    DefaultLeftMargin = 10;
    DefaultRightMargin = 11;

  public type
    /// <summary>Edit mode change event</summary>
    /// <param name="Sender">event source (TListViewBase)</param>
    /// <param name="AHandled">set to <c>True</c> if event was handled</param>
    THandleChangeEvent = procedure(const Sender: TObject; var AHandled: Boolean) of object;
    /// <summary>Generic TListItem event; used for <c>OnListItemClick</c>, <c>OnItemChange</c></summary>
    /// <param name="Sender">event source (TListViewBase)</param>
    /// <param name="AItem">item being acted upon</param>
    TListItemEvent = procedure(const Sender: TObject; const AItem: TListItem) of object;
    /// <summary>OnItemClickEx event</summary>
    /// <param name="Sender">event source</param>
    /// <param name="ItemIndex">index of item</param>
    /// <param name="LocalClickPos">click position in item local coordinates</param>
    /// <param name="ItemObject"><c>TListItemDrawable</c> that received the click</param>
    TListItemClickEventEx = procedure(const Sender: TObject; ItemIndex: Integer; const LocalClickPos: TPointF;
      const ItemObject: TListItemDrawable) of object;
    /// <summary><c>OnUpdateItemView</c> event</summary>
    TUpdateItemViewEvent = TListItemEvent;
    /// <summary><c>OnUpdatingItemView</c> event</summary>
    TUpdatingItemViewEvent = procedure(const Sender: TObject; const AItem: TListItem; var AHandled: Boolean) of object;
    /// <summary><c>OnDeletingItem</c> event</summary>
    TDeletingItemEvent = procedure(Sender: TObject; AIndex: Integer; var ACanDelete: Boolean) of object;
    /// <summary><c>OnDeleteItem</c> event</summary>
    TDeleteItemEvent = procedure(Sender: TObject; AIndex: Integer) of object;
    /// <summary><c>OnDeleteChangeVisible</c> event</summary>
    TDeleteChangeVisibilityEvent = procedure(Sender: TObject; AValue: Boolean) of object;

  private type
    TItemHeightSums = TList<Integer>;

    TDelayedIncident = (ChangeRepainted, Invalidate, SetItemIndex, ClickEvent);

    TDelayedIncidentEntry = record
      Incident: TDelayedIncident;
      Triggered: Boolean;
      StartTime: Double;
      TimeToWait: Double;
      CustomData: NativeInt;
    end;

    TDelayedIncidents = TList<TDelayedIncidentEntry>;

    TTransitionType = (None, EditMode, DeleteMode);

    TInternalDragMode = (None, Drag, Swype);

    TItemSelectionAlpha = record
      StartTime: Double;
      Alpha: Single;
      StartAlpha: Single;

      class function Create(const StartTime: Double; const Alpha, StartAlpha: Single): TItemSelectionAlpha; static; inline;
    end;

    TItemSelectionAlphas = TDictionary<Integer, TItemSelectionAlpha>;
    TPullRefreshAnimation = (NotPlaying, Playing, Finished);
    TStateFlag = (NeedsRebuild, NeedsScrollingLimitsUpdate, Invalid, Painting, ResettingObjects, ScrollingActive,
      ScrollingMouseTouch, NeedsScrollBarDisplay);
    TStateFlags = set of TStateFlag;
    TEstimatedHeights = record
      Item: Single;
      Header: Single;
      Footer: Single;
    end;

  private
    FTimerService: IFMXTimerService;
    FSystemInformationService: IFMXSystemInformationService;
    FListingService: IFMXListingService;
    FStateFlags: TStateFlags;
    FRecurrentTimerHandle: TFmxHandle;
    FDelayedIncidents: TDelayedIncidents;
    FSelectionAlphas: TItemSelectionAlphas;
    FItemIndex: Integer;
    FAniCalc: TAniCalculations;
    FScrollViewPos: Single;
    FBrush: TBrush;
    FStroke: TStrokeBrush;
    FMouseDownAt: TPointF;
    FMouseClickPrev: TPointF;
    FMouseClickDelta: TPointF;
    FMouseClicked: Boolean;
    FMouseClickIndex: Integer;
    FMouseEventIndex: Integer;
    FItemSpaces: TBounds;
    FMousePrevScrollPos: Single;
    FClickEventItemIndex: Integer;
    FClickEventMousePos: TPointF;
    [Weak] FClickEventControl: TListItemDrawable;
    FHeightSums: TItemHeightSums;
    FMaxKnownHeight: Integer;
    FSideSpace: Integer;
    FScrollScale: Single;
    FBackgroundStyleColor: TAlphaColor;
    FSelectionStyleColor: TAlphaColor;
    FItemStyleFillColor: TAlphaColor;
    FItemStyleFillAltColor: TAlphaColor;
    FItemStyleFrameColor: TAlphaColor;
    [Weak] FSelectionStyleImage: TStyleObject;
    [Weak] FHeaderStyleImage: TStyleObject;
    FTouchAnimationObject: ITouchAnimationObject;
    FScrollBar: TScrollBar;
    FTransparent: Boolean;
    FAllowSelection: Boolean;
    FAlternatingColors: Boolean;
    FTapSelectItemIndex: Integer;
    FTapSelectNewIndexApplied: Integer;
    FTapSelectStartTime: Double;
    FShowSelection: Boolean;
    FOnChange: TNotifyEvent;
    FOnChangeRepainted: TNotifyEvent;
    FOnItemsChange: TNotifyEvent;
    FOnScrollViewChange: TNotifyEvent;
    FOnSearchChange: TNotifyEvent;
    FOnFilter: TFilterEvent;
    FAutoTapScroll: Boolean;
    FAutoTapTreshold: Integer;
    FAutoTapDistance: Integer;
    FOnListItemClick: TListItemEvent;
    FOnItemClickEx: TListItemClickEventEx;
    FOnItemChange: TListItemEvent;
    FOnEditModeChanging: THandleChangeEvent;
    FOnEditModeChange: TNotifyEvent;
    FOnUpdateItemView: TUpdateItemViewEvent;
    FOnUpdatingItemView: TUpdatingItemViewEvent;
    FOnDeleteChange: TDeleteChangeVisibilityEvent;
    FOnDeletingItem: TDeletingItemEvent;
    FOnDeleteItem: TDeleteItemEvent;
    FOnPullRefresh: TNotifyEvent;
    FDeleteButtonText: string;
    FEditMode: Boolean;
    FCanSwipeDelete: Boolean;
    FDeleteButtonIndex: Integer;
    FPrevDeleteButtonIndex: Integer;
    FStyleResources: TListItemStyleResources;
    FUpdatingStyleResources: Boolean;
    FDisableMouseWheel: Boolean;
    FTransitionStartTime: Double;
    FTransitionType: TTransitionType;
    FEditModeTransitionAlpha: Single;
    FDeleteModeTransitionAlpha: Single;
    FDeleteLayout: TLayout;
    FDeleteButton: TSpeedButton;
    FDragListMode: TInternalDragMode;
    FSearchEdit: TSearchBox;
    FSearchVisible: Boolean;
    FSearchAlwaysOnTop: Boolean;
    FSelectionCrossfade: Boolean;
    FPullToRefresh: Boolean;
    FPullRefreshWait: Boolean;
    FPullRefreshTriggered: Boolean;
    FPullRefreshAnimation: TPullRefreshAnimation;
    FPullRefreshAnimationStartTime: Double;
    FPullRefreshAnimationStopTime: Double;
    FScrollStretchStrength: Single;
    FControlType: TControlType;
    FNativeOptions: TListViewNativeOptions;
    FImageLink: TGlyphImageLink;
    FMessageSender: TMessageSender;
    FItemSelectedBeforeChange: TListItem;
    FEstimatedHeights: TEstimatedHeights;

    function IsRunningOnDesktop: Boolean;
    function HasTouchTracking: Boolean;
    function HasSearchFeatures: Boolean;
    function HasSearchAsItem: Boolean;
    function IsDeleteModeAllowed: Boolean;
    function HasStretchyScrolling: Boolean;
    function HasPhysicsStretchyScrolling: Boolean;
    function HasScrollingStretchGlow: Boolean;
    function HasPullRefreshStroke: Boolean;

    function CanDisplaySelectionForItem(const Index: Integer; const Item: TListItem = nil;
      const IncludeMultiSelect: Boolean = False; const IncludeCrossFaded: Boolean = False): Boolean;
    function GetDefaultSelectionAlpha: Single;
    function GetItemSelectionAlpha(const Index: Integer): Single;
    procedure DestroyRecurrentTimer;
    procedure UpdateRecurrentTimer;
    function HasRecurrentTimerEvents: Boolean;
    procedure RecurrentTimerEvent;
    procedure StartIncident(const Incident: TDelayedIncident; const Triggered: Boolean = True;
      const TimeToWait: Single = 0; const CustomData: NativeInt = 0);
    procedure ProcessIncident(const Entry: TDelayedIncidentEntry);
    procedure TriggerIncidents(const Incident: TDelayedIncident; const ResetStartupTime: Boolean = True);
    procedure ProcessDelayedIncidents;
    procedure ProcessTransitionAnimation;
    procedure ProcessTapSelectItem;
    procedure ProcessSelectionAlphas;
    procedure InsertItemCrossFade(const Index: Integer; const ShowAnimation: Boolean);
    procedure RemoveItemCrossFade(const Index: Integer);
    procedure StartPullRefreshAnimation;
    procedure ProcessPullRefreshAnimation;
    function GetPullRefreshStrength: Single;
    function GetPullRefreshIndicatorSteps: Integer;
    function GetPullRefreshIndicatorAlpha: Single;
    function GetPullRefreshStrokeWidth: Single;
    procedure PaintPullRefreshIndicator(const ACanvas: TCanvas; const AStrength, AOpacity: Single);
    procedure PaintPullRefreshStroke(const ACanvas: TCanvas; const AStrength, AOpacity: Single);
    procedure PaintScrollingStretchGlow(const ACanvas: TCanvas; const AIntensity, AOpacity: Single);
    procedure UpdatePullRefreshState;
    procedure UpdateScrollStretchStrength(const NewValue: Single);
    procedure DeleteButtonClicked(Sender: TObject);
    procedure ScrollBarChange(Sender: TObject);
    procedure ItemSpacesChange(Sender: TObject);
    procedure AniCalcChange(Sender: TObject);
    procedure AniCalcStart(Sender: TObject);
    procedure AniCalcStop(Sender: TObject);
    function GetItemIndex: Integer;
    procedure SetItemIndex(const Value: Integer);
    procedure SetItemIndexInternal(const Value: Integer; const DisableSelection: Boolean = False;
      const DisableCrossfade: Boolean = False);
    function GetMaxScrollViewPos: Integer;
    procedure UpdateScrollViewPos(const Value: Single);
    procedure UpdateSearchEditPos;
    procedure SetScrollViewPos(const Value: Single);
    procedure UpdateScrollingLimits;
    procedure UpdateScrollBar;
    procedure GetNumberOfRenderingPasses(const StartItem, EndItem: Integer; var Passes, Subpasses: Integer);
    function GetItemHeight(const Index: Integer): Integer; overload; virtual;
    function GetItemRelRect(const Index: Integer; const LocRect: TRectF; const SideSpace: Integer = 0): TRectF; inline;
    function GetItemGroupSeparators(const Index: Integer): Integer; inline;
    function FindLocalItemObjectAtPosition(const ItemIndex: Integer; const Position: TPointF): TListItemDrawable;

    function GetSeparatorLineHeight: Single;
    function AlignValueToPixel(const Value: Single): Single;
    procedure DrawItemsFill(const StartItem, EndItem: Integer; const LocRect: TRectF; const Opacity: Single;
      const HeaderIndex: Integer = -1);
    procedure DrawIndexFill(const AIndex: Integer; const LocRect: TRectF; const Opacity: Single);
    procedure DrawTouchAnimation(const Index: Integer; const LocRect: TRectF; const Opacity: Single);

    function GetHeaderRelRect(const StartItem, HeaderIndex: Integer; const LocRect: TRectF;
      const SideSpace: Integer = 0): TRectF;
    procedure DrawHeaderItem(const LocRect: TRectF; const StartItem, HeaderIndex: Integer; const Opacity: Single);

    procedure DrawListItems(const AbsOpacity: Single);

    procedure UpdateItemLookups;
    function FindItemAbsoluteAt(const ViewAt: Integer): Integer;
    function FindItemAbsoluteAtWithCheck(const ViewAt: Integer): Integer;
    procedure SetSideSpace(const Value: Integer);
    procedure SetTransparent(const Value: Boolean);
    procedure SetAlternatingColors(const Value: Boolean);
    procedure SetShowSelection(const Value: Boolean);
    procedure RecreateNativePresentation; virtual;

    procedure SetEditMode(const Value: Boolean);
    procedure SetCanSwipeDelete(const Value: Boolean);

    procedure SelectItem(const ItemIndex: Integer); virtual;
    procedure UnselectItem(const ItemIndex: Integer); virtual;
    function GetSelected: TListItem;
    procedure SetSelected(const Value: TListItem);
    procedure SetNewItemIndex(const NewIndex: Integer);

    procedure SetSearchVisible(const Value: Boolean);
    procedure SetSearchAlwaysOnTop(const Value: Boolean);
    procedure SetOnFilter(const Value: TFilterEvent);
    procedure OnSearchEditResize(Sender: TObject);
    procedure OnSearchEditChange(Sender: TObject);
    function DeleteButtonTextStored: Boolean;
    // ISearchResponder
    procedure SetFilterPredicate(const Predicate: TPredicate<string>);
    // IMessageSendingCompatible
    function GetMessageSender: TMessageSender;
    // Custom readers
    procedure ReadCanSwipeDelete(Reader: TReader);
    procedure ReadIsSearchVisible(Reader: TReader);
    procedure ReadIsSearchAlwaysOnTop(Reader: TReader);
    procedure ReadEditModeOptions(Reader: TReader);

    function GetItemCount: Integer;

    { IListViewController }
    procedure RequestReindexing(const Item: TListItem);
    procedure ItemResized(const Item: TListItem);
    procedure ItemInvalidated(const Item: TListItem);
    procedure ControlClicked(const Item: TListItem; const Control: TListItemDrawable);
    procedure CheckStateChanged(const Item: TListItem; const Control: TListItemDrawable);
    function GetScene: IScene;
  protected
    procedure DefineProperties(Filer: TFiler); override;
    /// <summary><c>True</c> if in Edit Mode</summary>
    function IsEditMode: Boolean; virtual;
    /// <summary>Used internally by presentation hook</summary>
    procedure DoSetItemIndexInternal(const Value: Integer); virtual;
    /// <summary>Used internally by presentation hook</summary>
    procedure DoUpdateScrollViewPos(const Value: Single); virtual;
    /// <summary>Used internally by presentation hook</summary>
    procedure DoSetScrollViewPos(const Value: Single); virtual;
    /// <summary>Invoked when Edit Mode is being changed; if Edit Mode requires a different appearance, this
    /// is where update of appearances should be initiated</summary>
    procedure WillEnterEditMode(const Animated: Boolean); virtual;
    /// <summary>Used internally by presentation hook</summary>
    function HasButtonsInCells: Boolean; virtual;
    /// <summary>Used internally by presentation hook</summary>
    function HasDeletionEditMode: Boolean; virtual;
    /// <summary>Used internally by presentation hook</summary>
    function HasCheckboxMode: Boolean; virtual;

    /// <summary>Stop edit mode transition animation</summary>
    procedure ResetEditModeAnimation;
    /// <summary>Initialize edit mode transition animation</summary>
    procedure InitEditModeAnimation;
    /// <summary>Stop delete mode transition animation</summary>
    procedure ResetDeleteModeAnimation;
    /// <summary>Initialize delete mode transition animation</summary>
    procedure InitDeleteModeAnimation;
    /// <summary>Update layout to place a Delete button</summary>
    procedure UpdateDeleteButtonLayout;
    /// <summary>Perform item deletion</summary>
    procedure ProceedDeleteItem;

    /// <summary>Invokes Pull-to-Refresh when applicable</summary>
    procedure ScrollStretchChanged; virtual;
    /// <summary>Scroll stretch threshold value when Pull-to-Refresh is invoked</summary>
    property ScrollStretchStrength: Single read FScrollStretchStrength;

    procedure SetSelectionCrossfade(const Value: Boolean);
    function GetDeleteButtonText: string;
    procedure SetDeleteButtonText(const Value: string);
    procedure SetPullToRefresh(const Value: Boolean);
    { IControlTypeSupportable }
    procedure SetControlType(const Value: TControlType);
    function GetControlType: TControlType;
    procedure SetNativeOptions(const Value: TListViewNativeOptions);

    { IListViewController }
    function GetEditModeTransitionAlpha: Single;
    function GetDeleteModeTransitionAlpha: Single;
    procedure SetDeleteButtonIndex(const NewItemIndex: Integer);
    function GetItemEditOffset(const Item: TListItem): Single;
    function GetItemDeleteCutoff(const Item: TListItem): Single;
    function GetClientMargins: TRectF;
    function GetItemCurrentSelectionAlpha(const Item: TListItem): Single;
    function IListViewController.GetItemSelectionAlpha = GetItemCurrentSelectionAlpha;
    function GetImages: TCustomImageList;
    procedure SetImages(const Value: TCustomImageList);

    /// <summary>Hook for <c>IListViewController.RequestReindexing</c></summary>
    procedure DoRequestReindexing(const Item: TListItem); virtual;
    /// <summary>Hook for <c>IListViewController.ItemResized</c></summary>
    procedure DoItemResized(const Item: TListItem); virtual;
    /// <summary>Hook for <c>IListViewController.ItemInvalidated</c></summary>
    procedure DoItemInvalidated(const Item: TListItem); virtual;
    /// <summary>Hook for <c>IListViewController.CheckStateChanged</c></summary>
    procedure DoCheckStateChanged(const Item: TListItem; const Control: TListItemDrawable); virtual;
    /// <summary>Hook for <c>IListViewController.ControlClicked</c></summary>
    procedure DoControlClicked(const Item: TListItem; const Control: TListItemDrawable); virtual;

    { IGlyph }
    function GetImageIndex: TImageIndex;
    procedure SetImageIndex(const Value: TImageIndex);
    function GetImageList: TBaseImageList; inline;
    procedure SetImageList(const Value: TBaseImageList);
    function IGlyph.GetImages = GetImageList;
    procedure IGlyph.SetImages = SetImageList;   
    { IListItemStyleResources }
    function GetStyleResources: TListItemStyleResources;
    function StyleResourcesNeedUpdate: Boolean;

    procedure SetItemSpaces(const Value: TBounds);
    function GetItemClientRect(const Index: Integer): TRectF; // part of IListViewPresentationParent
    function GetEstimatedItemHeight: Single; // part of IListViewPresentationParent
    function GetEstimatedHeaderHeight: Single; // part of IListViewPresentationParent
    function GetEstimatedFooterHeight: Single; // part of IListViewPresentationParent

    /// <summary>Called when an instance or reference to instance of <b>TBaseImageList</b> or the
    /// <b>ImageIndex</b> property is changed.
    /// <para>See also <b>FMX.ActnList.IGlyph</b></para></summary>
    procedure ImagesChanged; virtual;
    procedure Paint; override;
    procedure AfterPaint; override;
    procedure Loaded; override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Single); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
    procedure MouseWheel(Shift: TShiftState; WheelDelta: Integer; var Handled: Boolean); override;
    procedure KeyDown(var Key: Word; var KeyChar: System.WideChar;  Shift: TShiftState); override;
    function ObjectAtPoint(P: TPointF): IControl; override;
    procedure DoMouseLeave; override;
    procedure Resize; override;
    function GetDefaultStyleLookupName: string; override;
    procedure ApplyStyle; override;
    procedure FreeStyle; override;
    procedure Invalidate;
    procedure DoRealign; override;
    procedure DoExit; override;
    /// <summary>General state change. Starts <c>TDelayedIncident.ChangeRepainted</c> incident and
    /// invokes <c>OnChange</c></summary>
    procedure DoChange; virtual;
    /// <summary>Handle <c>TDelayedIncident.ChangeRepainted</c> incident</summary>
    procedure DoChangeRepainted; virtual;
    /// <summary>Invoke <c>OnItemChange</c> handler</summary>
    procedure DoListItemChange(const AListItem: TListItem); virtual;
    /// <summary>Invoke <c>OnListItemClick</c> handler</summary>
    procedure DoListItemClick(const AListItem: TListItem); virtual;
    /// <summary>Invoke <c>OnEditModeChange</c> handler</summary>
    procedure DoEditModeChange; virtual;
    /// <summary>Invoke <c>OnEditModeChanging</c> handler</summary>
    procedure DoEditModeChanging(var AHandled: Boolean); virtual;
    /// <summary>Reset edit mode animation</summary>
    procedure DoResetEditModeAnimation; virtual;
    /// <summary>Update scrolling limits and animation boundaries</summary>
    procedure DoUpdateScrollingLimits; virtual;

    // Notifications from IListViewAdapter
    procedure DoItemsMayChange; override;
    procedure DoItemsCouldHaveChanged; override;
    procedure DoItemsInvalidate; override;
    /// <summary>This virtual method is called immediately after list of items has been changed. </summary>
    procedure DoItemsChange; override;
    procedure DoAdapterSet; override;
    /// <summary>Deletes an item</summary>
    /// <param name="ItemIndex"> index of item to be deleted</param>
    /// <returns><c>True</c> if deleted succesfully</returns>
    function DeleteItem(const ItemIndex: Integer): Boolean;
    /// <summary>Perform actual item deletion. Called from DeleteItem: Boolean</summary>
    procedure DoDeleteItem(const ItemIndex: Integer); virtual;
    /// <summary>Get area available to item layout</summary>
    function GetFinalItemSpaces(const ForceIncludeScrollBar: Boolean = True): TRectF; virtual;
    /// <summary>Get item size</summary>
    function GetFinalItemSize(const ForceIncludeScrollBar: Boolean = True): TSizeF; virtual;
    function CanObserve(const ID: Integer): Boolean; override;
    /// <summary>Notify observers about selection change</summary>
    procedure ObserversBeforeSelection(out LAllowSelection: Boolean);
    /// <summary>Return <c>True</c> if this item should handle input events</summary>
    function ShouldHandleEvents: Boolean; virtual;
    /// <summary>Invoke <c>OnUpdatingItemView</c> handler</summary>
    procedure DoUpdatingItemView(const AListItem: TListItem; var AHandled: Boolean); virtual;
    // <summary>Invoke <c>OnUpdateItemView</c> handler</summary>
    procedure DoUpdateItemView(const AListItem: TListItem); virtual;
    /// <summary>Get glyph button for item <c>Index</c></summary>
    function GetGlyphButton(const Index: Integer): TListItemGlyphButton;
    /// <summary>Invoked before item view will be updated (before calling ResetObjects)</summary>
    property OnUpdatingItemView: TUpdatingItemViewEvent read FOnUpdatingItemView write FOnUpdatingItemView;
    /// <summary>Invoked after item view has been updated (after calling ResetObjects)</summary>
    property OnUpdateItemView: TUpdateItemViewEvent read FOnUpdateItemView write FOnUpdateItemView;
    /// <summary>Invoked after EditMode has been changed</summary>
    property OnEditModeChange: TNotifyEvent read FOnEditModeChange write FOnEditModeChange;
    /// <summary>Invoked before changing EditMode</summary>
    property OnEditModeChanging: THandleChangeEvent read FOnEditModeChanging write FOnEditModeChanging;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    class function GetDefaultMargins: TRectF;
    procedure EndUpdate; override;
    /// <summary>When using native presentation, re-creates the list and updates visible item content</summary>
    procedure RebuildList; virtual;
    /// <summary>Scrolls the view (instantly) to the desired item placing it within the view</summary>
    procedure ScrollTo(const AItemIndex: Integer);
    /// <summary>Index of selected item</summary>
    property ItemIndex: Integer read GetItemIndex write SetItemIndex default -1;
    /// <summary>Selected item</summary>
    property Selected: TListItem read GetSelected write SetSelected;
    /// <summary>Scroll position in dimension units</summary>
    property ScrollViewPos: Single read FScrollViewPos write SetScrollViewPos;
    /// <summary>Get rectangle of item, relative control</summary>
    function GetItemRect(const AItemIndex: Integer): TRectF;
    /// <summary>This method should be called when "pull to refresh" mode has been triggered to stop spinning wheel
    /// </summary>
    /// <remarks>This has only effect in native iOS control and only when PullRefreshWait property is set to True
    /// </remarks>
    procedure StopPullRefresh; virtual;
    /// <summary>Space in logical units around the content of each list item</summary>
    property ItemSpaces: TBounds read FItemSpaces write SetItemSpaces;
    /// <summary>The list of images. Can be <c>nil</c>. <para>See also <b>FMX.ActnList.IGlyph</b></para></summary>
    property Images: TCustomImageList read GetImages write SetImages;
    /// <summary>Space in logical units on all sides around the list box encompassing the items</summary>
    property SideSpace: Integer read FSideSpace write SetSideSpace default 0;
    /// <summary>If the control is transparent, it will not draw its background</summary>
    property Transparent: Boolean read FTransparent write SetTransparent;
    /// <summary>Determines whether the items are selectable or not. If items are not selectable, user will still be
    /// able to click on embedded controls</summary>
    property AllowSelection: Boolean read FAllowSelection write FAllowSelection default True;
    // <summary>Enabling this will switch fill colors for odd and even elements</summary>
    property AlternatingColors: Boolean read FAlternatingColors write SetAlternatingColors default False;
    /// <summary>Determines whether the selection is visible when selecting items.
    /// It may be disabled when using list of checkboxes</summary>
    property ShowSelection: Boolean read FShowSelection write SetShowSelection default True;
    /// <summary>Enables swipe delete</summary>
    property CanSwipeDelete: Boolean read FCanSwipeDelete write SetCanSwipeDelete default True;
    /// <summary>Enable automatic scrolling to the top when tapped at the top edge</summary>
    property AutoTapScroll: Boolean read FAutoTapScroll write FAutoTapScroll default False;
    /// <summary>Threshold distance from the top edge at which the tap would initiate autoscroll to top</summary>
    property AutoTapTreshold: Integer read FAutoTapTreshold write FAutoTapTreshold default 8;
    /// <summary>Disables mouse wheel</summary>
    property DisableMouseWheel: Boolean read FDisableMouseWheel write FDisableMouseWheel default False;
    /// <summary>Item count</summary>
    property ItemCount: Integer read GetItemCount;
    /// <summary>Item click handler</summary>
    property OnListItemClick: TListItemEvent read FOnListItemClick write FOnListItemClick;
    /// <summary>Extended item click handler which gets click coordinates and clicked drawable</summary>
    property OnItemClickEx: TListItemClickEventEx read FOnItemClickEx write FOnItemClickEx;
    /// <summary>Reserved</summary>
    property OnItemChange: TListItemEvent read FOnItemChange write FOnItemChange;
    /// <summary>General OnChange event handler</summary>
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    /// <summary><c>TDelayedIncident.ChangeRepainted</c> delayed incident handler</summary>
    property OnChangeRepainted: TNotifyEvent read FOnChangeRepainted write FOnChangeRepainted;
    /// <summary>This event occurs after list of items has been changed. </summary>
    property OnItemsChange: TNotifyEvent read FOnItemsChange write FOnItemsChange;
    /// <summary>Called when ScrollViewPos has changed (manually or in code)</summary>
    property OnScrollViewChange: TNotifyEvent read FOnScrollViewChange write FOnScrollViewChange;
    /// <summary>Query before item deletion, see <see cref='TDeletingItemEvent'>TDeletingItemEvent</see>.
    ///  Application can veto deletion by returning <c>False</c> in handler Result</summary>
    ///  <remarks>Deletion is performed by <see cref='DoDeleteItem'>DoDeleteItem</see></remarks>
    property OnDeletingItem: TDeletingItemEvent read FOnDeletingItem write FOnDeletingItem;
    /// <summary>Invoked after item has been deleted</summary>
    property OnDeleteItem: TDeleteItemEvent read FOnDeleteItem write FOnDeleteItem;
    /// <summary>Invoked when Delete button changes visibility</summary>
    property OnDeleteChangeVisible: TDeleteChangeVisibilityEvent read FOnDeleteChange write FOnDeleteChange;
    /// <summary></summary>
    property OnSearchChange: TNotifyEvent read FOnSearchChange write FOnSearchChange;
    /// <summary>Event handler for setting custom filter on text of <c>TListView</c>.</summary>
    property OnFilter: TFilterEvent read FOnFilter write SetOnFilter;
    /// <summary>Invoked when pull refresh is triggered</summary>
    property OnPullRefresh: TNotifyEvent read FOnPullRefresh write FOnPullRefresh;
    /// <summary>Text to display in Delete button</summary>
    property DeleteButtonText: string read GetDeleteButtonText write SetDeleteButtonText stored
      DeleteButtonTextStored nodefault;
    /// <summary>Enable/disable Edit Mode</summary>
    property EditMode: Boolean read FEditMode write SetEditMode default False;
    /// <summary><c>True</c> if search bar is visible</summary>
    property SearchVisible: Boolean read FSearchVisible write SetSearchVisible default False;
    /// <summary>Always display search bar</summary>
    property SearchAlwaysOnTop: Boolean read FSearchAlwaysOnTop write SetSearchAlwaysOnTop default True;
    /// <summary>Enable selection crossfade animation</summary>
    property SelectionCrossfade: Boolean read FSelectionCrossfade write SetSelectionCrossfade default False;
    /// <summary>Enable pull to refresh</summary>
    property PullToRefresh: Boolean read FPullToRefresh write SetPullToRefresh default False;
    /// <summary>When set to True, the spinning wheel does not disappear automatically and StopPullRefresh method needs
    /// to be called after refresh operation is done. If this is set to False (default), then spinning wheel disappears
    /// automatically shortly after triggering the effect. This option works only in native iOS control and has no
    /// effect otherwise.</summary>
    property PullRefreshWait: Boolean read FPullRefreshWait write FPullRefreshWait default False;
    /// <summary>Control type: Styled or Native</summary>
    property ControlType: TControlType read FControlType write SetControlType default TControlType.Styled;
    /// <summary>Options for Native control; see <see cref='ControlType'>ControlType</see></summary>
    property NativeOptions: TListViewNativeOptions read FNativeOptions write SetNativeOptions default [];
  end;

  /// <summary>TListView that supports native presentation</summary>
  TPresentedListView = class(TListViewBase, IListViewPresentationParent, IListViewDesignPresentationParent)
  strict private
    FPresentation: IListViewPresentation;
    FPresentationLocked: Integer;
    FCreatingNativeView: Boolean;
  protected
    /// <summary>Lock presentation and execute <c>P</c></summary>
    procedure ExecuteInterlocked(const P: TProc);
    /// <summary><c>True</c> if item can be selected</summary>
    function CanSelectItem(const AItemIndex: Integer): Boolean;
    /// <summary><c>True</c> if item can be unselected</summary>
    function CanUnselectItem(const AItemIndex: Integer): Boolean;
    /// <summary>Called after item has been selected</summary>
    procedure DidSelectItem(const AItemIndex: Integer);
    /// <summary>Called after item has been unselected</summary>
    procedure DidUnselectItem(const AItemIndex: Integer);
    procedure ChangeOrder; override;
    procedure ParentChanged; override;
    procedure PaintChildren; override;
    procedure AncestorVisibleChanged(const Visible: Boolean); override;
    procedure DoSetItemIndexInternal(const Value: Integer); override;
    procedure DoEditModeChange; override;
    procedure DoItemsChange; override;
    procedure DoItemsInvalidate; override;
    procedure DoItemInvalidated(const Item: TListItem); override;
    procedure DoCheckStateChanged(const AItem: TListItem; const Control: TListItemDrawable); override;
    procedure DoUpdateScrollViewPos(const Value: Single); override;
    procedure DoSetScrollViewPos(const Value: Single); override;
    procedure DoDeleteItem(const ItemIndex: Integer); override;
    procedure DoResetEditModeAnimation; override;
    procedure DoUpdateScrollingLimits; override;
    procedure DoAbsoluteChanged; override;
    // Presentation
    /// <summary>Parent control has been loaded</summary>
    procedure PMAncesstorPresentationLoaded(var AMessage: TDispatchMessageWithValue<Boolean>); message PM_ANCESTOR_PRESENTATION_LOADED;
    procedure RecreateNativePresentation; override;
    function ShouldHandleEvents: Boolean; override;
    // IPresentationParent
    function GetRootObject: TObject;
    function GetContentFrame: TRect;
    function GetControlOpacity: Single;
    // IListViewPresentationParent
    function GetAdapter: IListViewAdapter;
    function GetItemText(const ItemIndex: Integer): string;
    function GetItemIndexTitle(const ItemIndex: Integer): string;
    procedure ItemButtonClicked(const ItemIndex: Integer);
    procedure InvokePullRefresh;
    procedure SetSearchFilter(const Filter: string);
    function GetTableViewFlags: TListViewModeFlags;
    function GetTableViewOptions: TListViewNativeOptions;
    function IListViewPresentationParent.GetFlags = GetTableViewFlags;
    function IListViewPresentationParent.GetOptions = GetTableViewOptions;
    procedure SetCreatingNativeView(const Value: Boolean);
    function GetIsTransparent: Boolean;
    function GetOpacity: Single;
    function GetBackgroundStyleColor: TAlphaColor;
    procedure DoItemsResize; override;
    // IListViewDesignPresentationParent
    function HasDesignPresentationAttached: Boolean;
  public
    destructor Destroy; override;
    procedure BeforeDestruction; override;
    procedure RecalcEnabled; override;
    procedure Show; override;
    procedure Hide; override;
    procedure Resize; override;
    procedure Paint; override;
    procedure RebuildList; override;
    procedure StopPullRefresh; override;
    procedure RecalcOpacity; override;
  end;

  /// <summary>TAppearanceListView supports Appearances. Appearances are templates used for dynamic creation
  ///  of item views. Normally all items of the same purpose in the List View share the same appearance, differing
  ///  only in data</summary>
  TAppearanceListView = class(TPresentedListView, IAppearanceItemOwner, IPublishedAppearanceOwner)
  public type
    /// <summary>Generic event invoked on <c>TListViewItem</c></summary>
    TItemEvent = procedure(const Sender: TObject; const AItem: TListViewItem) of object;
    /// <summary>See <c>DoUpdateItemView</c></summary>
    TUpdateObjectsEvent = TItemEvent;
    /// <summary>See <c>DoUpdatingItemView</c></summary>
    TUpdatingObjectsEvent = procedure(const Sender: TObject; const AItem: TListViewItem; var AHandled: Boolean) of object;

  strict private
    FAppearanceViewItems: TAppearanceListViewItems;
    FAppearanceProperties: TPublishedAppearance;
    FItemAppearanceObjects: TPublishedObjects;
    FItemAppearanceProperties: TItemAppearanceProperties;
    FItemEditAppearanceProperties: TItemAppearanceProperties;
    FHeaderAppearanceProperties: TItemAppearanceProperties;
    FFooterAppearanceProperties: TItemAppearanceProperties;
    FUpdatingAppearance: Integer;
    FChangedAppearanceObjects: TListItemPurposes;
    FChangedAppearanceHeights: TListItemPurposes;
    // See also FItemSelectedBeforeChange
    FItemSelectedBeforeEdit: TListItem;
    FOnButtonClick: TItemControlEvent;
    FOnButtonChange: TItemControlEvent;
    FAppearanceAllowsCheckboxes: Boolean;
    FAppearanceAllowsDeleteMode: Boolean;
    FOnItemClick: TItemEvent;
    FOnUpdatingObjects: TUpdatingObjectsEvent;
    FOnUpdateObjects: TUpdateObjectsEvent;

    function GetFooterAppearanceName: string;
    function GetFooterAppearanceClassName: string;
    function GetHeaderAppearanceName: string;
    function GetHeaderAppearanceClassName: string;
    function GetItemAppearanceName: string;
    function GetItemEditAppearanceName: string;
    function GetItemObjectsClassName: string;
    function GetItemEditObjectsClassName: string;
    procedure SetFooterAppearanceClassName(const Value: string);
    procedure SetHeaderAppearanceClassName(const Value: string);
    procedure SetItemObjectsClassName(const Value: string);
    procedure SetItemEditObjectsClassName(const Value: string);
    procedure SetFooterAppearanceName(const Value: string);
    procedure SetHeaderAppearanceName(const Value: string);
    procedure SetItemAppearanceName(const Value: string);
    procedure SetItemEditAppearanceName(const Value: string);

    procedure SetAppearanceProperties(const Value: TPublishedAppearance);
    procedure SetItemAppearanceObjects(const Value: TPublishedObjects);
    function GetItemAppearanceObjects: TPublishedObjects;
    procedure AppearanceResetObjects(APurposes: TListItemPurposes);
    procedure AppearanceResetHeights(APurposes: TListItemPurposes);

    { IPublishedAppearanceOwner }

    function GetFooterAppearanceProperties: TItemAppearanceProperties;
    function GetHeaderAppearanceProperties: TItemAppearanceProperties;
    function GetItemAppearanceProperties: TItemAppearanceProperties;
    function GetItemEditAppearanceProperties: TItemAppearanceProperties;

    procedure EditorBeforeItemAdded(Sender: IListViewEditor);
    procedure EditorAfterItemAdded(Sender: IListViewEditor; const Item: TListItem);
    procedure EditorBeforeItemDeleted(Sender: IListViewEditor; const Index: Integer);
    procedure EditorAfterItemDeleted(Sender: IListViewEditor);
    procedure ResetViewAppearance(const AItem: TListViewItem);

  protected
    procedure ApplyStyle; override;
    /// <summary>Handler of
    /// <see cref='TAppearanceListViewItems.OnNotify'>TAppearanceListViewItems.OnNotify</see></summary>
    procedure ObjectsNotify(Sender: TObject; const Item: TListItem; Action: TCollectionNotification);
    /// <summary>TAppearanceListView needs adapter to be TAppearanceListViewItems or derivative.
    /// If TAppearanceListView is used with a custom adapter, use <c>Items</c> property to set it
    /// instead of Adapter property of the base class</summary>
    procedure SetAppearanceListViewItems(const AItems: TAppearanceListViewItems);
    procedure DoResetView(const Item: TListItem); override;

    function HasButtonsInCells: Boolean; override;
    function HasDeletionEditMode: Boolean; override;
    function HasCheckboxMode: Boolean; override;
    procedure SetItemHeight(const Value: Integer); virtual;
    procedure SetItemEditHeight(const Value: Integer); virtual;
    procedure SetHeaderHeight(const Value: Integer); virtual;
    procedure SetFooterHeight(const Value: Integer); virtual;

    function GetAppearanceListViewItem(const Index: Integer): TListViewItem; virtual;
    /// <summary>Get height of a specific item</summary>
    function GetItemHeight(const Index: Integer): Integer; overload; override;
    // See respective properties
    function GetItemHeight: Integer; overload; virtual;
    function GetItemEditHeight: Integer; overload; virtual;
    function GetHeaderHeight: Integer; overload; virtual;
    function GetFooterHeight: Integer; overload; virtual;

    procedure WillEnterEditMode(const Animated: Boolean); override;
    procedure DoResetEditModeAnimation; override;

    procedure DoAdapterSet; override;
    // hooks from IListViewController
    procedure DoRequestReindexing(const Item: TListItem); override;
    procedure DoItemResized(const Item: TListItem); override;
    procedure DoCheckStateChanged(const AItem: TListItem; const Control: TListItemDrawable); override;
    procedure DoControlClicked(const Item: TListItem; const Control: TListItemDrawable); override;
    /// <summary>Returns an array of 4 elements comprised by
    /// <para><c>ItemEditAppearanceProperties</c></para>
    /// <para><c>ItemAppearanceProperties</c></para>
    /// <para><c>HeaderAppearanceProperties</c></para>
    /// <para><c>FooterAppearanceProperties</c></para></summary>
    function GetAppearanceProperties: TArray<TItemAppearanceProperties>;
    /// <summary>Refresh items with specified purposes; all items if the set is empty;
    ///  see also <see cref='IListViewAdapter.ResetViews'>IListViewAdapter.ResetViews</see></summary>
    procedure RefreshAppearances(const APurposes: TListItemPurposes = []);
    /// <summary>Same as RefreshAppearances</summary>
    procedure UpdateAppearanceStyleResources;
    /// <summary>Invoked when item appearance changes; resets all item views</summary>
    procedure ItemAppearanceChange(const Sender: TItemAppearanceProperties);
    /// <summary>Invoked when Appearance Objects (view prototype) change</summary>
    procedure ItemAppearanceChangeObjects(const Sender: TItemAppearanceProperties);
    /// <summary>Invoked when appearance height is changed</summary>
    procedure ItemAppearanceChangeHeight(const Sender: TItemAppearanceProperties);
    /// <summary>Resets all item views when entering edit mode</summary>
    procedure EditModeAppearances;
    /// <summary>Reset appearance. When TAppearanceListView is created, it creates appearances
    /// for Item, Edit mode Item, Header, Footer and initializes them by calling this virtual method.
    /// By contract it must select <c>TItemAppearanceProperties.AppearanceClass</c> by searching in
    /// appearances registry for item purpose specified during TItemAppearanceProperties creation</summary>
    /// <param name="AAppearance">instance of <c>TItemAppearanceProperties</c></param>
    /// <remarks>See implementation in
    ///  <see cref='TListView.InitializeItemAppearance'>TListView.InitializeItemAppearance</see>
    ///  <para>See also <see cref='TAppearancesRegistry'>TAppearancesRegistry</see></para>
    /// </remarks>
    procedure InitializeItemAppearance(const AAppearance: TItemAppearanceProperties); virtual;

    procedure DoListItemClick(const AItem: TListItem); override;
    procedure DoUpdatingItemView(const AListItem: TListItem; var AHandled: Boolean); override;
    procedure DoUpdateItemView(const AListItem: TListItem); override;

    // General compatibility properties
    /// <summary>Item height defined by appearance </summary>
    property ItemHeight: Integer read GetItemHeight write SetItemHeight;
    /// <summary>Item height in edit mode defined by appearance</summary>
    property ItemEditHeight: Integer read GetItemEditHeight write SetItemEditHeight;
    /// <summary>Header height defined by appearance</summary>
    property HeaderHeight: Integer read GetHeaderHeight write SetHeaderHeight;
    /// <summary>Footer height defined by appearance</summary>
    property FooterHeight: Integer read GetFooterHeight write SetFooterHeight;

    // Appearance related properties
    /// <summary>Item in edit mode appearance class name</summary>
    /// <remarks>Must be loaded prior to other Item, header and footer properties
    ///  <para>Changing class name will load new appearance and reinitialize all views</para>
    /// </remarks>
    property ItemEditAppearanceClassName: string read GetItemEditObjectsClassName write SetItemEditObjectsClassName;
    /// <summary>Item appearance class name</summary>
    /// <remarks>Must be loaded prior to other Item, header and footer properties
    ///  <para>Changing class name will load new appearance and reinitialize all views</para>
    /// </remarks>
    property ItemAppearanceClassName: string read GetItemObjectsClassName write SetItemObjectsClassName;
    /// <summary>Header appearance class name</summary>
    /// <remarks>Must be loaded prior to other Item, header and footer properties
    ///  <para>Changing class name will load new appearance and reinitialize all views</para>
    /// </remarks>
    property HeaderAppearanceClassName: string read GetHeaderAppearanceClassName write SetHeaderAppearanceClassName;
    /// <summary>Footer appearance class name</summary>
    /// <remarks>Must be loaded prior to other Item, header and footer properties
    ///  <para>Changing class name will load new appearance and reinitialize all views</para>
    /// </remarks>
    property FooterAppearanceClassName: string read GetFooterAppearanceClassName write SetFooterAppearanceClassName;

    /// <summary>Assign new appearance by name; this will effectively change <c>ItemAppearanceClassName</c> and reload
    /// all views</summary>
    property ItemAppearanceName: string read GetItemAppearanceName write SetItemAppearanceName stored False;
    /// <summary>Assign new appearance by name; this will effectively change <c>ItemEditAppearanceClassName</c> and reload
    /// all views</summary>
    property ItemEditAppearanceName: string read GetItemEditAppearanceName write SetItemEditAppearanceName stored False;
    /// <summary>Assign new appearance by name; this will effectively change <c>HeaderAppearanceClassName</c> and reload
    /// all views</summary>
    property HeaderAppearanceName: string read GetHeaderAppearanceName write SetHeaderAppearanceName stored False;
    /// <summary>Assign new appearance by name; this will effectively change <c>FooterAppearanceClassName</c> and reload
    /// all views</summary>
    property FooterAppearanceName: string read GetFooterAppearanceName write SetFooterAppearanceName stored False;
    // <summary><c>TPublishedAppearance</c> represents appearances in the object inspector</summary>
    property ItemAppearance: TPublishedAppearance read FAppearanceProperties write SetAppearanceProperties;
    /// <summary><c>TPublishedObjects</c> represents appearance items (collections of objects comprising appearances)
    /// in the object inspector</summary>
    property ItemAppearanceObjects: TPublishedObjects read GetItemAppearanceObjects write SetItemAppearanceObjects;
    /// <summary>Invoked on check button state change</summary>
    property OnButtonChange: TItemControlEvent read FOnButtonChange write FOnButtonChange;
    /// <summary>Invoked on embedded button click</summary>
    property OnButtonClick: TItemControlEvent read FOnButtonClick write FOnButtonClick;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure BeginUpdate; override;
    procedure EndUpdate; override;
    procedure Resize; override;
    /// <summary>Access to the extended adapter that supports appearances and works with extended
    /// items; see <see cref='TListViewItem'>TListViewItem</see></summary>
    property Items: TAppearanceListViewItems read FAppearanceViewItems write SetAppearanceListViewItems;
    /// <summary>Item click event handler</summary>
    property OnItemClick: TItemEvent read FOnItemClick write FOnItemClick;
    /// <summary>Invoked when view is being created by <c>TAppearanceListView.ResetViewAppearance</c> before
    /// calling <c>ResetObjects</c>. If not Handled, the view will be recreated</summary>
    ///  <remarks>Call sequence:
    /// <para><c>TAppearanceListView.ResetViewAppearance:</c></para>
    /// <para><c>OnUpdatingObjects</c> ->
    /// <c>TItemAppearanceObjects.ResetObjects</c> -> <c>OnUpdateObjects</c></para></remarks>
    property OnUpdatingObjects: TUpdatingObjectsEvent read FOnUpdatingObjects write FOnUpdatingObjects;
    /// <summary>Invoked when view is being created by <c>TAppearanceListView.ResetViewAppearance</c> after
    /// calling <c>ResetObjects</c></summary>
    ///  <remarks>Call sequence:
    /// <para><c>TAppearanceListView.ResetViewAppearance:</c></para>
    /// <para><c>OnUpdatingObjects</c> ->
    /// <c>TItemAppearanceObjects.ResetObjects</c> -> <c>OnUpdateObjects</c></para></remarks>
    property OnUpdateObjects: TUpdateObjectsEvent read FOnUpdateObjects write FOnUpdateObjects;
  end;

  TCustomListView = class(TAppearanceListView)
  end;

  TListView = class(TCustomListView)
  protected
    procedure InitializeItemAppearance(const AAppearance: TItemAppearanceProperties); override;
  public
    // Hoist protected appearance properties
    property ItemAppearanceName;
    property ItemEditAppearanceName;
    property HeaderAppearanceName;
    property FooterAppearanceName;
  published
    // Hoist protected appearance properties
    property ItemAppearanceClassName;
    property ItemEditAppearanceClassName;
    property HeaderAppearanceClassName;
    property FooterAppearanceClassName;

    property OnUpdatingObjects;
    property OnUpdateObjects;
    property OnEditModeChange;
    property OnEditModeChanging;
    property EditMode;

    property Transparent default false;
    property AllowSelection;
    property AlternatingColors;
    property ItemIndex;
    property Images;
    property ScrollViewPos;
    property ItemSpaces;
    property SideSpace;

    property Align;
    property Anchors;
    property CanFocus default True;
    property CanParentFocus;
    property ClipChildren default True;
    property ClipParent default False;
    property Cursor default crDefault;
    property DisableFocusEffect default True;
    property DragMode default TDragMode.dmManual;
    property EnableDragHighlight default True;
    property Enabled default True;
    property Locked default False;
    property Height;
    property Hint;
    property HitTest default True;
    property Margins;
    property Opacity;
    property Padding;
    property PopupMenu;
    property Position;
    property RotationAngle;
    property RotationCenter;
    property Scale;
    property Size;
    property TabOrder;
    property TabStop;
    property Visible default True;
    property Width;
    property ParentShowHint;
    property ShowHint;

    {events}
    property OnApplyStyleLookup;
    property OnFreeStyle;
    {Drag and Drop events}
    property OnDragEnter;
    property OnDragLeave;
    property OnDragOver;
    property OnDragDrop;
    property OnDragEnd;
    {Keyboard events}
    property OnKeyDown;
    property OnKeyUp;
    {Mouse events}
    property OnCanFocus;

    property OnEnter;
    property OnExit;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnMouseWheel;
    property OnMouseEnter;
    property OnMouseLeave;

    property OnPainting;
    property OnPaint;
    property OnResize;
    property OnResized;

    property ItemAppearance;
    property ItemAppearanceObjects;

    property HelpContext;
    property HelpKeyword;
    property HelpType;

    property StyleLookup;
    property TouchTargetExpansion;
    property OnClick;
    property OnDblClick;

    { ListView selection events }
    property CanSwipeDelete;

    property OnChange;
    property OnChangeRepainted;
    property OnItemsChange;
    property OnScrollViewChange;
    property OnItemClick;
    property OnItemClickEx;
    property OnButtonClick;
    property OnButtonChange;

    property OnDeletingItem;
    property OnDeleteItem;
    property OnDeleteChangeVisible;
    property OnSearchChange;
    property OnFilter;
    property OnPullRefresh;
    property DeleteButtonText;

    property AutoTapScroll;
    property AutoTapTreshold;
    property ShowSelection;
    property DisableMouseWheel;

    property SearchVisible;
    property SearchAlwaysOnTop;
    property SelectionCrossfade;
    property PullToRefresh;
    property PullRefreshWait;

    property ControlType;
    property NativeOptions;
  end;

  EListViewError = class(Exception);

//== INTERFACE END: FMX.ListView
//==================================================================================================