CrosshairLabelElementBase Class

The base class for classes that provide functionality for crosshair label elements.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v20.1.dll

Declaration

[NonCategorized]
public abstract class CrosshairLabelElementBase
<NonCategorized>
Public MustInherit Class CrosshairLabelElementBase

Remarks

The CrosshairLabelElementBase class serves as a base for classes that provide the crosshair label element functionality of the crosshair cursor.

Use the properties of the CrosshairLabelElementBase when custom drawing the crosshair cursor using the ChartControl.CustomDrawCrosshair event handler.

For more information, refer to Tooltip and Crosshair Cursor.

Examples

This example shows how to provide a custom appearance for the crosshair cursor using the ChartControl.CustomDrawCrosshair event. This event is invoked when you click the Custom Draw Crosshair Cursor button on the form.

If you wish to display crosshair axis lines and labels on a chart before custom drawing the crosshair cursor, set the CrosshairOptions.ShowArgumentLabels, CrosshairOptions.ShowArgumentLine, CrosshairOptions.ShowValueLabels and CrosshairOptionsBase.ShowValueLine properties to true.

Note that the customization of the crosshair cursor is provided for the CrosshairOptions.SnapMode property set to NearestArgument.

<Window x:Class="CrosshairCustomDraw.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525" xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts">
    <Grid>
        <StackPanel>
            <dxc:ChartControl Height="269"  Name="chartControl1" CustomDrawCrosshair="chartControl1_CustomDrawCrosshair">
                <dxc:ChartControl.CrosshairOptions>
                    <dxc:CrosshairOptions ShowArgumentLabels="True" ShowArgumentLine="True" 
                        ShowValueLabels="True" ShowValueLine="True"/>
                </dxc:ChartControl.CrosshairOptions>
                <dxc:XYDiagram2D>
                <dxc:LineSeries2D DisplayName="Series1">
                    <dxc:SeriesPoint Argument="1" Value="50"/>
                    <dxc:SeriesPoint Argument="2" Value="44"/>
                    <dxc:SeriesPoint Argument="3" Value="55"/>
                    <dxc:SeriesPoint Argument="4" Value="77"/>
                </dxc:LineSeries2D>
                <dxc:LineSeries2D DisplayName="Series2">
                    <dxc:SeriesPoint Argument="1" Value="22"/>
                    <dxc:SeriesPoint Argument="2" Value="11"/>
                    <dxc:SeriesPoint Argument="3" Value="9"/>
                    <dxc:SeriesPoint Argument="4" Value="8"/>
                </dxc:LineSeries2D>
                </dxc:XYDiagram2D>
            </dxc:ChartControl>
            <Button Height="35" Content="Custom Draw Crosshair Cursor" Click="Button_Click"></Button>
        </StackPanel>
    </Grid>
</Window>

Inheritance

Object
CrosshairLabelElementBase
See Also