Leadtools.Windows.Controls Namespace > ImageViewer Class : OnGeometryFrameTypeChanged Method |
protected virtual void OnGeometryFrameTypeChanged( RoutedPropertyChangedEventArgs<GeometryFrameType> e )
'Declaration Protected Overridable Sub OnGeometryFrameTypeChanged( _ ByVal e As RoutedPropertyChangedEventArgs(Of GeometryFrameType) _ )
'Usage Dim instance As ImageViewer Dim e As RoutedPropertyChangedEventArgs(Of GeometryFrameType) instance.OnGeometryFrameTypeChanged(e)
protected: virtual void OnGeometryFrameTypeChanged( RoutedPropertyChangedEventArgs<GeometryFrameType>^ e )
Raising an event invokes the event handler through a delegate.
The OnGeometryFrameTypeChanged method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
Notes to Inheritors: When overriding OnGeometryFrameTypeChanged in a derived class, be sure to call the base class's OnGeometryFrameTypeChanged method so that registered delegates receive the event.