Occurs when the current auto-hide DockPanel is about to be displayed.
public event DockPanelCancelEventHandler Expanding
Public Event Expanding As DockPanelCancelEventHandler
The Expanding event's data class is DockPanelCancelEventArgs. The following properties provide information specific to this event:
|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 Expanding event occurs. Afterwards, when the panel is shown, the DockPanel.Expanded event is raised. The DockPanel.Collapsing and DockPanel.Collapsed events are opposite events , fired when a panel is auto-hidden.