TdxChartBarSeriesPointDrawParameters.Appearance Property

Provides access to fill and outline settings of a bar that displays the currently processed series point.

Declaration

delphi

property Appearance: TdxChartXYSeriesBarAppearance read;

Property Value

Type	Description
TdxChartXYSeriesBarAppearance

Stores Bar series View appearance settings.

Remarks

Use Appearance.FillOptions and Appearance.StrokeOptions properties to change area fill and outline appearance of the bar that displays the currently processed series point in a Simple, Stacked, or Full-Stacked Bar View.

Refer to the TdxChartXYSeriesBarAppearance class description for detailed information on all available options.

Code Example: Customize Individual Series Bars

The following code example demonstrates a diagram’s OnGetSeriesPointDrawParameters event handler that changes the appearance settings of all bars that display peak values in a Simple Bar series.

Delphi
C++

delphi

procedure TMyForm.cdBarGetSeriesPointDrawParameters(Sender: TdxChartCustomDiagram;
  AArgs: TdxChartGetSeriesPointDrawParametersEventArgs);
var
  ABarDrawParameters: TdxChartBarSeriesPointDrawParameters;
  ASeries: TdxChartCustomSeries;
  AIndex: Integer;
begin
  if AArgs.SeriesPoint.Series.Caption = '2020' then
  begin
    if AArgs.DrawParameters.ClassType <> TdxChartBarSeriesPointDrawParameters then Exit;
    ABarDrawParameters := AArgs.DrawParameters as TdxChartBarSeriesPointDrawParameters;
    AIndex := AArgs.SeriesPoint.Index;
    ASeries := AArgs.SeriesPoint.Series;
    if ((AIndex = 0) and (ASeries.Points.Values[AIndex] > ASeries.Points.Values[AIndex + 1])) or
       ((AIndex > 0) and (AIndex < ASeries.Points.Count - 1) and
       (ASeries.Points.Values[AIndex] > ASeries.Points.Values[AIndex + 1]) and
        (ASeries.Points.Values[AIndex] > ASeries.Points.Values[AIndex - 1])) then
    begin
      ABarDrawParameters.Appearance.BeginUpdate;
      ABarDrawParameters.Appearance.FillOptions.Color := TdxAlphaColors.OrangeRed;
      ABarDrawParameters.Appearance.FillOptions.Mode := TdxFillOptionsMode.Hatch;
      ABarDrawParameters.Appearance.FillOptions.HatchStyle := TdxFillOptionsHatchStyle.ForwardDiagonal;
      ABarDrawParameters.Appearance.FillOptions.Color2 := TdxAlphaColors.Teal;
      ABarDrawParameters.Appearance.StrokeOptions.Color := TdxAlphaColors.Red;
      ABarDrawParameters.Appearance.StrokeOptions.Style := TdxStrokeStyle.Solid;
      ABarDrawParameters.Appearance.EndUpdate;
    end;
  end;
end;

cpp

void __fastcall TMyForm::cdBarGetSeriesPointDrawParameters(TdxChartCustomDiagram *Sender
   TdxChartGetSeriesPointDrawParametersEventArgs *AArgs)
{
  TdxChartBarSeriesPointDrawParameters *ABarDrawParameters;
  TdxChartCustomSeries *ASeries;
  int AIndex;
  // ...
  if(AArgs->SeriesPoint->Series->Caption == "2020")
  {
    if(AArgs->DrawParameters->ClassType() != __classid(TdxChartBarSeriesPointDrawParameters)) { return; }
    ABarDrawParameters = dynamic_cast<TdxChartBarSeriesPointDrawParameters*>(AArgs->DrawParameters);
    AIndex = AArgs->SeriesPoint->Index;
    ASeries = AArgs->SeriesPoint->Series;
    if(((AIndex == 0) && (ASeries->Points->Values[AIndex] > ASeries->Points->Values[AIndex + 1])) ||
      ((AIndex > 0) && (AIndex < ASeries->Points->Count - 1) &&
      (ASeries->Points->Values[AIndex] > ASeries->Points->Values[AIndex + 1]) &&
      (ASeries->Points->Values[AIndex] > ASeries->Points->Values[AIndex - 1])))
      {
        ABarDrawParameters->MarkerAppearance->FillOptions->Color = TdxAlphaColors::Red;
        ABarDrawParameters->Appearance->BeginUpdate();
        ABarDrawParameters->Appearance->FillOptions->Color = TdxAlphaColors::OrangeRed;
        ABarDrawParameters->Appearance->FillOptions->Color2 = TdxAlphaColors::Teal;
        ABarDrawParameters->Appearance->FillOptions->Mode = TdxFillOptionsMode::Hatch;
        ABarDrawParameters->Appearance->FillOptions->HatchStyle = TdxFillOptionsHatchStyle::ForwardDiagonal;
        ABarDrawParameters->Appearance->StrokeOptions->Color = TdxAlphaColors::Red;
        ABarDrawParameters->Appearance->StrokeOptions->Style = TdxStrokeStyle::Solid;
        ABarDrawParameters->Appearance->EndUpdate();
      }
  }
}