XYDiagram2D.BeforeScroll Event
Occurs before the diagram is scrolled.
Namespace: DevExpress.Xpf.Charts
Assembly: DevExpress.Xpf.Charts.v24.1.dll
NuGet Package: DevExpress.Wpf.Charts
Declaration
Event Data
The BeforeScroll event's data class is XYDiagram2DBeforeScrollEventArgs. The following properties provide information specific to this event:
Property | Description |
---|---|
Axis | Returns the scrolled axis. |
Cancel | Gets or sets the value that specifies whether scrolling is canceled. |
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. |
NewRange | Returns information about the zoomed axis’s new visual range. |
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. |
The event data class exposes the following methods:
Method | Description |
---|---|
InvokeEventHandler(Delegate, Object) | When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs. |
OnSetSource(Object) | When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs. |
Remarks
You can handle the XYDiagram2D.BeforeScroll
event to cancel a scroll operation. Set the e.Cancel property to true for this purpose.
private void XYDiagram2D_BeforeScroll(object sender, XYDiagram2DBeforeScrollEventArgs e) {
if (e.Axis is AxisY2D) {
e.Cancel = true;
}
}
See Also