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Leadtools.Windows.Annotations Namespace > AnnProtractorObject Class : OnMeasurementUnitChanged Method |
protected virtual void OnMeasurementUnitChanged( RoutedPropertyChangedEventArgs<AnnUnit> e )
'Declaration Protected Overridable Sub OnMeasurementUnitChanged( _ ByVal e As RoutedPropertyChangedEventArgs(Of AnnUnit) _ )
'Usage Dim instance As AnnProtractorObject Dim e As RoutedPropertyChangedEventArgs(Of AnnUnit) instance.OnMeasurementUnitChanged(e)
protected: virtual void OnMeasurementUnitChanged( RoutedPropertyChangedEventArgs<AnnUnit>^ e )
Raising an event invokes the event handler through a delegate.
The OnMeasurementUnitChanged 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 OnMeasurementUnitChanged in a derived class, be sure to call the base class's OnMeasurementUnitChanged method so that registered delegates receive the event.