CustomDrawCrosshairEventArgs.IndicatorLegendElements Property

Returns all indicator elements that the Crosshair Cursor shows in a legend.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v23.2.dll

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public List<CrosshairIndicatorLegendElement> IndicatorLegendElements { get; }

VB.NET

Public ReadOnly Property IndicatorLegendElements As List(Of CrosshairIndicatorLegendElement)

Property Value

Type	Description
List<CrosshairIndicatorLegendElement>	A collection of CrosshairIndicatorLegendElement objects. These objects represent indicator elements that the Crosshair Cursor shows in a legend.

Example

This example shows how to modify the Crosshair Cursor indicator elements’ appearance using the CustomDrawCrosshair event.

In this sample, crosshair content is displayed in a legend. For this, set the ContentShowMode property to Legend. Note that you can specify the crosshair’s content show mode for a specified indicator using the CrosshairContentShowMode property.

Use the IndicatorLegendElements property to obtain a collection of indicator elements.

The following properties allow you to modify indicator element appearance:

Property	Description
IndicatorPoint	Returns information about an indicator point under a crosshair.
CrosshairLegendElementBase.LineElement	Returns the crosshair line settings.
CrosshairLegendElementBase.AxisLabelElement	Returns the crosshair axis label settings.

XAML

<dxc:ChartControl x:Name="chartControl" 
                  CustomDrawCrosshair="chartControl_CustomDrawCrosshair">
    <dxc:ChartControl.CrosshairOptions>
        <dxc:CrosshairOptions ShowOnlyInFocusedPane="False" 
                              ShowValueLine="True"
                              ShowValueLabels="True"
                              ContentShowMode="Legend"/>
    </dxc:ChartControl.CrosshairOptions>
    <!--...-->
</dxc:ChartControl>    

C#

private void chartControl_CustomDrawCrosshair(object sender, CustomDrawCrosshairEventArgs e) {
    Brush brush = new SolidColorBrush(Colors.Green);
    foreach(CrosshairIndicatorLegendElement indicatorLegendElement in e.IndicatorLegendElements) {
        if(indicatorLegendElement.IndicatorPoint.GetNumericValue(IndicatorValueLevel.Value) > 0) {
            indicatorLegendElement.LineElement.Brush = brush;            
            indicatorLegendElement.LineElement.LineStyle.DashStyle = new DashStyle(new double[] {5, 2}, 2);
            indicatorLegendElement.AxisLabelElement.Background = brush;
        }
    }
}

VB.NET

Private Sub chartControl_CustomDrawCrosshair(ByVal sender As Object, ByVal e As CustomDrawCrosshairEventArgs)
    Dim brush As Brush = New SolidColorBrush(Colors.Green)

    For Each indicatorLegendElement As CrosshairIndicatorLegendElement In e.IndicatorLegendElements

        If indicatorLegendElement.IndicatorPoint.GetNumericValue(IndicatorValueLevel.Value) > 0 Then
            indicatorLegendElement.LineElement.Brush = brush
            indicatorLegendElement.LineElement.LineStyle.DashStyle = New DashStyle(New Double() {5, 2}, 2)
            indicatorLegendElement.AxisLabelElement.Background = brush
        End If
    Next
End Sub