Fires after the expanded state of a group has been changed.
NuGet Package: DevExpress.Wpf.NavBar
The GroupExpandedChanged event's data class is NavBarGroupExpandedChangedEventArgs. The following properties provide information specific to this event:
|Group||Gets a group object related to the event.|
|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.|
|IsExpanded||Gets a value indicating whether the processed group is expanded.|
|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:
|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.|
Write an GroupExpandedChanged event handler to perform specific actions each time a group’s expanded state changes within the NavBarControl.
To learn more, see the Expand and Collapse Groups and Expanded Group topics.
This example demonstrates how to wrap an item’s text onto several lines, if this text is too long. To accomplish this, a template of the NavBarViewBase.ItemTemplate type is created at the view level. This template contains a standard TextBlock control whose TextBlock.TextWrapping property is set to Wrap.
<Application x:Class="LongNavBarItemText.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" StartupUri="Window1.xaml"> <Application.Resources> </Application.Resources> </Application>