TdxChartCustomSeries.ViewType Property

Specifies the active series View type.

Declaration

property ViewType: string read; write;

Property Value

Type	Description
string	The name of the active series View type. Refer to the Remarks section for details.

Remarks

Use the ViewType or ViewClass property to switch between View types available for the series. Different TdxChartCustomSeries class descendants support different View types:

TdxChartXYSeries

An XY series supports the following Area, Bar, and Line Views:

ViewType^[1] Value	ViewClass^[2] Value	Example^[3]
`'Area'`	TdxChartXYSeriesAreaView
`'StackedArea'`	TdxChartXYSeriesStackedAreaView
`'FullStackedArea'`	TdxChartXYSeriesFullStackedAreaView
`'Bar'`	TdxChartXYSeriesBarView
`'StackedBar'`	TdxChartXYSeriesStackedBarView
`'FullStackedBar'`	TdxChartXYSeriesFullStackedBarView
`'Line'`	TdxChartXYSeriesLineView
`'StackedLine'`	TdxChartXYSeriesStackedLineView
`'FullStackedLine'`	TdxChartXYSeriesFullStackedLineView

TdxChartSimpleSeries

A simple series supports the following Pie and Doughnut Views:

ViewType^[1] Value	ViewClass^[2] Value	Example^[3]
`'Pie'`	TdxChartSimpleSeriesPieView
`'Doughnut'`	TdxChartSimpleSeriesDoughnutView

Code Example: Bound Mode

The following code example creates three line series with identical appearance settings in bound mode:

Delphi
C++

var
  AXYDiagram: TdxChartXYDiagram;
  AXYSeriesAmericas, AXYSeriesEurope, AXYSeriesAfrica: TdxChartXYSeries;
  ALineView: TdxChartXYSeriesLineView;
  ADataBinding: TdxChartXYSeriesDBDataBinding;
begin
  dxChartControl1.BeginUpdate;  // Initiates the following batch change
  try
    dxChartControl1.Titles.Add.Text := 'Historic, Current, and Future Population Projection';
    AXYDiagram := dxChartControl1.AddDiagram<TdxChartXYDiagram>;
    AXYDiagram.Axes.AxisY.Title.Text := 'Population mid-year, millions';
    AXYDiagram.Axes.AxisX.Interlaced := True;
    AXYSeriesEurope := AXYDiagram.AddSeries('Europe');  // Creates a new series with the caption "Europe"
    AXYSeriesEurope.ShowInLegend := TdxChartSeriesShowInLegend.Diagram;
    ADataBinding := AXYSeriesEurope.DataBinding as TdxChartXYSeriesDBDataBinding;
    ADataBinding.DataSource := dsPopulation;  // Assigns a data source
    ADataBinding.DataSource.DataSet := mdPopulation;  // Assigns a dataset
    ADataBinding.DataSource.DataSet.Active := True;  // Enables the assigned dataset
    ADataBinding.ArgumentField.FieldName := 'Year';  // Specifies the source dataset field for arguments
    ADataBinding.ValueField.FieldName := 'Europe';  // Specifies the source dataset field for values
    AXYSeriesEurope.ViewType := 'Line';  // Selects the Line series View
    ALineView := TdxChartXYSeriesLineView(AXYSeriesEurope.View);
    ALineView.Markers.Visible := True;  // Displays value markers
    ALineView.ValueLabels.Visible := True;  // Displays value labels
    ALineView.Appearance.StrokeOptions.Width := 2;  // Increases line width
    AXYSeriesAmericas := AXYDiagram.AddSeries;  // Creates a new series with the default settings
    AXYSeriesAmericas.AssignFrom(AXYSeriesEurope);  // Copies all settings from the "Europe" series
    AXYSeriesAmericas.Caption := 'Americas';  // Defines a different series caption
    // Specifies a different source dataset field for values
    TdxChartXYSeriesDBDataBinding(AXYSeriesAmericas).ValueField.FieldName := 'Americas';
    AXYSeriesAfrica := AXYDiagram.AddSeries;  // Creates a new series with the default settings
    AXYSeriesAfrica.AssignFrom(AXYSeriesEurope);  // Copies all settings from the "Europe" series
    AXYSeriesAfrica.Caption := 'Africa';  // Defines a different series caption
    // Specifies a different source dataset field for values
    TdxChartXYSeriesDBDataBinding(AXYSeriesAfrica).ValueField.FieldName := 'Africa';
  finally
    dxChartControl1.EndUpdate;  // Calls EndUpdate regardless of the batch operation's success
  end;
end;

  TdxChartXYDiagram *AXYDiagram;
  TdxChartXYSeries *AXYSeriesEurope, *AXSeriesAmericas, *AXYSeriesAfrica;
  TdxChartXYSeriesLineView *ALineView;
  TdxChartXYSeriesDBDataBinding *ADataBinding;
  // ...
  dxChartControl1->BeginUpdate();  // Initiates the following batch change
  try
  {
    dxChartControl1->Titles->Add()->Text = "Historic, Current, and Future Population Projection";
    AXYDiagram = dxChartControl1->AddDiagram<TdxChartXYDiagram>();
    AXYDiagram->Axes->AxisY->Title->Text = "Population mid-year, millions";
    AXYDiagram->Axes->AxisX->Interlaced = true;
    AXYSeriesEurope = AXYDiagram->AddSeries("Europe"); // Creates a new series with the caption "Europe"
    AXYSeriesEurope->ShowInLegend = TdxChartSeriesShowInLegend::Diagram;
    ADataBinding = dynamic_cast<TdxChartXYSeriesDBDataBinding*>(AXYSeriesEurope->DataBinding);
    ADataBinding->DataSource = dsPopulation;  // Assigns a data source
    ADataBinding->DataSource->DataSet = mdPopulation; // Assigns a dataset
    ADataBinding->DataSource->DataSet->Active = true; // Enables the assigned dataset
    ADataBinding->ArgumentField->FieldName = "Year";  // Specifies the source dataset field for arguments
    ADataBinding->ValueField->FieldName = "Europe";  // Specifies the source dataset field for values
    AXYSeriesEurope->ViewType = "Line";  // Selects the Line series View
    ALineView := dynamic_cast<TdxChartXYSeriesLineView*>(AXYSeriesEurope->View);
    ALineView->Markers->Visible := true;  // Displays value markers
    ALineView->ValueLabels->Visible = true;  // Displays value labels
    ALineView->Appearance->StrokeOptions->Width = 2; // Increases line width
    AXYSeriesAmericas = AXYDiagram->AddSeries();  // Creates a new series with the default settings
    AXYSeriesAmericas->AssignFrom(AXYSeriesEurope);  // Copies all settings from the "Europe" series
    ADataBinding = dynamic_cast<TdxChartXYSeriesDBDataBinding*>(AXYSeriesAmericas->DataBinding);
    ADataBinding->ValueField->FieldName = "Americas"; // Specifies a different source dataset field for values
    AXYSeriesAmericas->Caption = "Americas";  // Defines a different series caption
    AXYSeriesAfrica = AXYDiagram->AddSeries();  // Creates a new series with the default settings
    AXYSeriesAfrica->AssignFrom(AXYSeriesEurope);  // Copies all settings from the "Europe" series
    ADataBinding = dynamic_cast<TdxChartXYSeriesDBDataBinding*>(AXYSeriesAfrica->DataBinding);
    ADataBinding->ValueField->FieldName = "Africa";  // Specifies a different source dataset field for values
    AXYSeriesAfrica->Caption = "Africa";  // Defines a different series caption
  }
  __finally
    dxChartControl1->EndUpdate(); // Calls EndUpdate regardless of the batch operation's success
  // ...

The VCL Chart Control with Three Line Series

Code Example: Unbound Mode

The following code example creates three stacked bar series with identical appearance settings in unbound data access mode:

Delphi
C++

var
  AXYDiagram: TdxChartXYDiagram;
  AXY2018Series, AXY2019Series, AXY2020Series: TdxChartXYSeries;
  AStackedBarView: TdxChartXYSeriesStackedBarView;
begin
  dxChartControl1.BeginUpdate;  // Initiates the following batch change
  try
    AXYDiagram := dxChartControl1.AddDiagram<TdxChartXYDiagram>('DevAV Sales By Region');
    AXYDiagram.Title.Appearance.FontOptions.Size := 20;
    AXYDiagram.Axes.AxisY.Title.Text := 'Millions of Dollars';
    AXYDiagram.Axes.AxisY.Title.Appearance.FontOptions.Size := 14;
    AXY2018Series := AXYDiagram.AddSeries('2018');  // Creates a new series with the caption "2018"
    AXY2018Series.DataBindingType := 'Unbound';  // Selects the unbound data access mode
    // Changes the argument field type to "string"
    TdxChartXYSeriesUnboundDataBinding(AXY2018Series.DataBinding).ArgumentField.ValueType := 'string';
    AXY2018Series.ViewType := 'StackedBar';  // Selects the Stacked Bar series View
    AStackedBarView := AXY2018Series.View as TdxChartXYSeriesStackedBarView;
    AStackedBarView.ValueLabels.Visible := True;  // Displays value labels on bars
    AStackedBarView.ValueLabels.NumberFormat := '0.000';  // Changes the number display format
    AStackedBarView.ValueLabels.Appearance.FontOptions.Bold := True;
    AXY2018Series.Points.Add('Asia', 4.2372);
    AXY2018Series.Points.Add('Australia', 1.7871);
    AXY2018Series.Points.Add('Europe', 3.0884);
    AXY2018Series.Points.Add('North America', 3.4855);
    AXY2018Series.Points.Add('South America', 1.6027);
    AXY2019Series := AXYDiagram.AddSeries;  // Creates a new series with the default settings
    AXY2019Series.AssignFrom(AXY2018Series);  // Copies all settings from the "2018" series
    AXY2019Series.Caption := '2019';  // Defines a different series caption
    AXY2019Series.Points.Add('Asia', 4.7685);
    AXY2019Series.Points.Add('Australia', 1.9576);
    AXY2019Series.Points.Add('Europe', 3.3579);
    AXY2019Series.Points.Add('North America', 3.7477);
    AXY2019Series.Points.Add('South America', 1.8237);
    AXY2020Series := AXYDiagram.AddSeries('2020');  // Creates a new series with the default settings
    AXY2020Series.AssignFrom(AXY2018Series);  // Copies all settings from the "2018" series
    AXY2020Series.Caption := '2020';  // Defines a different series caption
    AXY2020Series.Points.Add('Asia', 5.289);
    AXY2020Series.Points.Add('Australia', 2.2727);
    AXY2020Series.Points.Add('Europe', 3.7257);
    AXY2020Series.Points.Add('North America', 4.1825);
    AXY2020Series.Points.Add('South America', 2.1172);
  finally
    dxChartControl1.EndUpdate;  // Calls EndUpdate regardless of the batch operation's success
  end;
end;

  TdxChartXYDiagram *AXYDiagram;
  TdxChartXYSeries *AXY2018Series, *AXY2019Series, *AXY2020Series;
  TdxChartXYSeriesStackedBarView *AStackedBarView;
  TdxChartXYSeriesUnboundDataBinding *ADataBinding;
  // ...
  dxChartControl1->BeginUpdate();  // Initiates the following batch change
  try
  {
    AXYDiagram = dxChartControl1->AddDiagram<TdxChartXYDiagram>("DevAV Sales by Region");
    AXYDiagram->Title->Appearance->FontOptions->Size = 20;
    AXYDiagram->Axes->AxisY->Title->Text = "Millions of Dollars";
    AXYDiagram->Axes->AxisY->Title->Appearance->FontOptions->Size = 14;
    AXYSeries = AXYDiagram->AddSeries("2018"); // Creates a new series with the caption "2018"
    AXYSeries->DataBindingType = "Unbound";  // Selects the unbound data access mode
    ADataBinding = dynamic_cast<TdxChartXYSeriesUnboundDataBinding*>(AXY2018Series->DataBinding);
    ADataBinding->ArgumentField->ValueType = "string"; // Changes the argument field type to "string"
    AXYSeries->ViewType = "StackedBar";  // Selects the Stacked Bar series View
    AStackedBarView = dynamic_cast<TdxChartXYSeriesStackedBarView*>(AXY2018Series->View);
    AStackedBarView->ValueLabels->Visible = true; // Displays value labels on bars
    AStackedBarView->ValueLabels->NumberFormat = "0.000"; // Changes the number display format
    AStackedBarView->ValueLabels->Appearance->FontOptions->Bold = true;
    AXY2018Series->Points->Add("Asia", 4.2372);
    AXY2018Series->Points->Add("Australia", 1.7871);
    AXY2018Series->Points->Add("Europe", 3.0884);
    AXY2018Series->Points->Add("North America", 3.4855);
    AXY2018Series->Points->Add("South America", 1.6027);
    AXY2019Series = AXYDiagram->AddSeries();  // Creates a new series with the default settings
    AXY2019Series->AssignFrom(AXY2018Series); // Copies all settings from the "2018" series
    AXY2019Series->Caption = "2019"; // Defines a different series caption
    AXY2019Series->Points->Add("Asia", 4.7685);
    AXY2019Series->Points->Add("Australia", 1.9576);
    AXY2019Series->Points->Add("Europe", 3.3579);
    AXY2019Series->Points->Add("North America", 3.7477);
    AXY2019Series->Points->Add("South America", 1.8237);
    AXY2020Series = AXYDiagram->AddSeries();  // Creates a new series with the default settings
    AXY2020Series->AssignFrom(XY2018Series); // Copies all settings from the "2018" series
    AXY2020Series->Caption = "2020";  // Defines a different series caption
    AXY2020Series->Points->Add("Asia", 5.289);
    AXY2020Series->Points->Add("Australia", 2.2727);
    AXY2020Series->Points->Add("Europe", 3.7257);
    AXY2020Series->Points->Add("North America", 4.1825);
    AXY2020Series->Points->Add("South America", 2.1172);
  }
  __finally
    dxChartControl1->EndUpdate(); // Calls EndUpdate regardless of the batch operation's success
  // ...

The VCL Chart Control with Three Stacked Bar Series

The ViewType property setter updates the ViewClass and View properties according to the selected series View type.
The ViewClass property setter updates the ViewType and View property values according to the selected series View type.
The Example column demonstrates the same series when different Views are active.

Controls

Tools

Controls and Extensions

Tools

Maintenance Mode

Controls

Tools

Controls and Extensions

Tools

Maintenance Mode

TdxChartCustomSeries.ViewType Property

Declaration

Property Value

Remarks

Code Example: Bound Mode

Code Example: Unbound Mode