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Occurs right before the  Foreground is drawn. Use the OnDrawingForeground event to paint behind the Foreground before it is drawn over top. By setting the DoDraw parameter to False, you can also prevent the Foreground from drawing. The Canvas parameter contains the canvas where the Foreground will be drawn, and the ARect parameter specifies where on the canvas the Foreground will be drawn.

Namespace: FMX.RS.ChartPanel

expandingSyntax

Delphi

public
  property OnDrawingForeground: TRSChartDrawingEvent read GetOnDrawingForeground write SetOnDrawingForeground;
 

Value

Type: TRSChartDrawingEvent

expandingExamples

The following code uses the OnDrawingGradient event handler to prevent the gradient from being drawn. The same principle applies here:

Delphi

procedure TForm1.RSChartPanel1DrawingGradient(Sender: TObject;
   const Canvas: TCanvas; ARect: TRect; var DoDraw: Boolean);
 begin
      DoDraw := False;
 end;

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