NavBarViewBase.ActiveGroupChanging Event
Fires before the active group is changed.
Namespace: DevExpress.Xpf.NavBar
Assembly: DevExpress.Xpf.NavBar.v21.2.dll
NuGet Package: DevExpress.Wpf.NavBar
Declaration
Event Data
The ActiveGroupChanging event's data class is NavBarActiveGroupChangingEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| Cancel | Gets or sets a value indicating whether the operation which raised an event should be 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. |
| NewGroup | Gets a group object that is going to be activated. |
| OriginalSource | Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs. |
| PrevGroup | Gets the previously activated group. |
| 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
The ActiveGroupChanging event occurs when the active group is going to be changed within the NavBarControl. This event allows you to cancel active group changing, if required.
See Also