Gets or sets whether the pop-up pane displaying the contents of the active group is opened. This property is in effect if the NavigationPaneView is collapsed. This is a dependency property.
true, if the pop-up pane is opened; otherwise, false.
The IsPopupOpen property is in effect for the collapsed Navigation Pane.
The pop-up pane allows you to display the contents of the active group without expanding the collapsed Navigation Pane. Depending on the NavBarGroup.NavPaneShowMode property of the active group, the pop-up pane can be invoked by a click on the Active Group Button or the predefined All Folders button. The pop-up pane cannot be invoked if the NavBarGroup.NavPaneShowMode property equals Items. The following image shows the pop-up pane opened by a click on the Active Group Button.
Read the IsPopupOpen property to obtain whether the pop-up pane is currently opened. You can also use this property to programmatically open or close the pop-up pane.