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DockManager.Expanding Event

Occurs when any auto-hide DockPanel within the current DockManager is about to be displayed.

Namespace: DevExpress.XtraBars.Docking

Assembly: DevExpress.XtraBars.v22.2.dll

NuGet Package: DevExpress.Win.Navigation


public event DockPanelCancelEventHandler Expanding

Event Data

The Expanding event's data class is DockPanelCancelEventArgs. The following properties provide information specific to this event:

Property Description
Cancel Gets or sets whether the operation performed on the processed panel should be cancelled.
Panel Gets the processed dock panel. Inherited from DockPanelEventArgs.


Use the BaseDockOptions.ShowAutoHideButton property to specify whether an end-user can enable/disable auto-hiding a panel at runtime. When an auto-hide DockPanel is about to be displayed, the DockPanel.Expanding event occurs. Afterwards, when the panel is shown, the DockPanel.Expanded event is raised. The same applies for panel hiding. The DockPanel.Collapsing and DockPanel.Collapsed events are raised in this case.

The Expanding event is the global version of the DockPanel.Expanding event and occurs when any auto-hide DockManager panel within the DockManager is about to be displayed.

See Also