MycLib/AuraTrader/MainForm.pas

unit MainForm;

interface

uses
    System.SysUtils,
    System.Types,
    System.UITypes,
    System.Classes,
    System.Variants,
    System.DateUtils,
    System.Generics.Collections,
    FMX.Types,
    FMX.Controls,
    FMX.Forms,
    FMX.Graphics,
    FMX.Dialogs,
    FMX.Controls.Presentation,
    FMX.StdCtrls,
    FMX.ListView.Types,
    FMX.ListView.Appearances,
    FMX.ListView.Adapters.Base,
    FMX.ListView,
    FMX.Memo.Types,
    FMX.ScrollBox,
    FMX.Memo,
    FMX.Objects,
    Myc.Futures,
    Myc.Trade.DataStream,
    Myc.Trade.DataPoint,
    Myc.Trade.DataProvider,
    Myc.Signals,
    Myc.Lazy,
    Myc.Signals.FMX,
    Myc.TaskManager,
    FMX.ListBox,
    FMX.Layouts;

type
    TForm1 = class(TForm)
        LogMemo: TMemo;
        Panel1: TPanel;
        RandomButton: TButton;
        Path1: TPath;
        SymbolsComboBox: TComboBox;
        LoadButton: TButton;
        FlowLayout: TFlowLayout;
        Button1: TButton;
        Button2: TButton;
        procedure RandomButtonClick(Sender: TObject);
        procedure FormCreate(Sender: TObject);
        procedure FormDestroy(Sender: TObject);
        procedure LoadButtonClick(Sender: TObject);
        procedure Button1Click(Sender: TObject);
        procedure Button2Click(Sender: TObject);
    private
        const
            cnt = 20;
        type
            TRndItem = record
                Stream: IDataStream<TAskBidItem>;
                Data: TMutable<TDataSeries<TAskBidItem>>;
                Labl: TLabel;
            end;
    private
        FOnEvent: TNotifyEvent;
        { Private declarations }
        FServer: IDataServer<TAskBidItem>;
        FSymbols: TFuture<TArray<String>>;
        FRandom: TList<TRndItem>;
        FTerminate: TEvent;
        FLoadDone: TState;
    public
    { Public declarations }
    published
        property OnEvent: TNotifyEvent read FOnEvent write FOnEvent;
    end;

var
    Form1: TForm1;

implementation

{$R *.fmx}

procedure TForm1.Button1Click(Sender: TObject);
begin
    if SymbolsComboBox.ItemIndex < 0 then
        exit;

    var curr := TWriteable<TDataSeries<TAskBidItem>>.CreateProtected;
    var Symbol := FSymbols.WaitFor[SymbolsComboBox.ItemIndex];

    var currPathData := TWriteable<IObjectRef<TPathData>>.CreateProtected;

    LogMemo.AddIdleHandler(curr.Changed, procedure begin LogMemo.Lines.Add(Symbol + ': ' + curr.Value.TotalCount.ToString); end);

    var arr := TDataSeries<TAskBidItem>.CreateArray(3000);
    var done :=
        FServer.ProcessData(
            Symbol,
            FTerminate.Signal,
            procedure(const Values: TArray<TDataPoint<TAskBidItem>>; const Terminated: TState)
            begin
                arr.Add(Values);
                curr.Value := arr.Copy;

                var PathData := TPathData.Create;
                var Prices := arr;
                if Prices.Count > 0 then
                begin
                    PathData.MoveTo(PointF(Prices.Count - 1, Prices[0].Data.Ask));
                    for var i := 1 to Prices.Count - 1 do
                        PathData.LineTo(PointF(Prices.Count - i - 1, Prices[i].Data.Ask));
                end;

                currPathData.Value := TObjectRef<TPathData>.Create(PathData);
            end
        );

    FLoadDone := TState.All([FLoadDone, done]);

    Path1.AddIdleHandler(
        currPathData.Changed,
        procedure
        begin
            if currPathData.Value<>nil then
            begin
                Path1.Data.Assign( currPathData.Value.Obj );
                currPathData.Value := nil;
            end;
        end );


(*
    FLoadDone := TState.All([FLoadDone, done]);

    Path1.AddIdleHandler(
        curr.Changed,
        procedure
        begin
            var Prices := curr.Value;

            if Prices.Count > 0 then
            begin
                Path1.BeginUpdate;
                try
                    Path1.Data.Clear;
                    Path1.Data.MoveTo(PointF(Path1.Width - 1, Prices[0].Data.Ask));
                    for var i := 1 to Prices.Count - 1 do
                    begin
                        Path1.Data.LineTo(PointF(Path1.Width - i - 1, Prices[i].Data.Ask));
                    end;
                finally
                    Path1.EndUpdate;
                end;
            end;
        end
    );
*)
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
    FTerminate.Notify;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
    FTerminate := TEvent.CreateEvent;
    FRandom := TList<TRndItem>.Create;

    // Create an instance of the TAuraTABFileServer. The server can be reused for multiple stream creations. [364]
    FServer := TAuraTABFileServer.Create('\\COFFEE\TickData\Pepperstone');

    SymbolsComboBox.Enabled := false;

    FSymbols := FServer.EnumerateSymbols;

    SymbolsComboBox.AddIdleHandler(
        FSymbols.Done.Signal,
        procedure
        begin
            SymbolsComboBox.BeginUpdate;
            try
                SymbolsComboBox.Items.Clear;
                SymbolsComboBox.Items.AddStrings(FSymbols.WaitFor);
                if SymbolsComboBox.Items.Count > 0 then
                begin
                    if SymbolsComboBox.ItemIndex < 0 then
                        SymbolsComboBox.ItemIndex := SymbolsComboBox.Items.IndexOf('GER40');
                    SymbolsComboBox.Enabled := true;
                end;
            finally
                SymbolsComboBox.EndUpdate;
            end;
        end
    );
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
    FTerminate.Notify;
    TaskManager.WaitFor(FLoadDone);
    Application.OnIdle := nil;
    FRandom.Free;
end;

procedure TForm1.LoadButtonClick(Sender: TObject);
begin
    if SymbolsComboBox.ItemIndex < 0 then
        exit;

    var Stream := FServer.CreateStream(FSymbols.WaitFor[SymbolsComboBox.ItemIndex]);
    var Data := TDataStreamProvider.Create<TAskBidItem>(30000, 10000, Stream);

    Path1.AddIdleHandler(
        Data.Changed,
        procedure
        begin
            var Prices := Data.Value;

            if Prices.Count > 0 then
            begin
                Path1.BeginUpdate;
                try
                    Path1.Data.Clear;
                    Path1.Data.MoveTo(PointF(Path1.Width - 1, Prices[0].Data.Ask));
                    for var i := 1 to Prices.Count - 1 do
                        Path1.Data.LineTo(PointF(Path1.Width - i - 1, Prices[i].Data.Ask));
                finally
                    Path1.EndUpdate;
                end;
            end;
        end
    );
end;

procedure TForm1.RandomButtonClick(Sender: TObject);
begin
    var rnd: TRndItem;

    var ass := FSymbols.WaitFor;
    rnd.Stream := FServer.CreateStream(ass[Random(Length(FSymbols.WaitFor))]);
    rnd.Data := TDataStreamProvider.Create<TAskBidItem>(3000, 1000, rnd.Stream);

    rnd.Labl := TLabel.Create(Self);
    rnd.Labl.Parent := FlowLayout;
    rnd.Labl.Align := TAlignLayout.None;
    rnd.Labl.WordWrap := false;
    rnd.Labl.Width := 300;
    rnd.Labl.Text := rnd.Stream.Symbol + ' loading...';
    FRandom.Add(rnd);

    var Proc :=
        procedure(idx: Integer)
        begin
            FRandom[idx]
                .Labl
                .AddIdleHandler(
                    FRandom[idx].Data.Changed,
                    procedure
                    begin
                        var data := FRandom[idx].Data.Value;
                        if data.Count > 0 then
                        begin
                            var dp := data[0];
                            FRandom[idx].Labl.Text :=
                                FRandom[idx].Stream.Symbol
                                    + ' '
                                    + dp.Time.ToString
                                    + ' '
                                    + data.TotalCount.ToString
                                    + '  '
                                    + dp.Data.Ask.ToString;
                        end;
                    end);
        end;
    Proc(FRandom.Count - 1);
end;

end.