wpf-devexpress-dot-xpf-dot-docking-dot-docklayoutmanager-f0e550a3.md
Fires after a visible auto-hidden dock panel has slid away.
Namespace : DevExpress.Xpf.Docking
Assembly : DevExpress.Xpf.Docking.v25.2.dll
NuGet Package : DevExpress.Wpf.Docking
public event DockItemCollapsedEventHandler DockItemCollapsed
Public Event DockItemCollapsed As DockItemCollapsedEventHandler
The DockItemCollapsed event's data class is DockItemCollapsedEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| 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. |
| Item | Gets the currently processed item. Inherited from ItemEventArgs. |
| 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. |
To expand and collapse an auto-hidden panel in code, use the DockController.Activate and DockLayoutManager.Collapse method, respectively.
See Also