ChartControl.CustomDrawCrosshair Event

Occurs before crosshair items are drawn when the chart's contents are being drawn.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v14.2.dll

Declaration

C#

public event CustomDrawCrosshairEventHandler CustomDrawCrosshair

VB.NET

Public Event CustomDrawCrosshair As CustomDrawCrosshairEventHandler

Event Data

The CustomDrawCrosshair event's handler receives an argument of the CustomDrawCrosshairEventArgs type. The following properties provide information specific to this event:

Property	Description
CrosshairAxisLabelElements	Gets the settings of crosshair axis label elements to customize their appearance.
CrosshairElementGroups
CrosshairLineElement	Gets the settings of a crosshair line element to customize its appearance (color, line style).
Handled	Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs.
OriginalSource	Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
RoutedEvent	Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs.
Source	Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.

Remarks

Use the CustomDrawCrosshair event to create a custom appearance for crosshair items.

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 CrosshairOptions.ShowValueLine properties to true.

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