private static void OnInputSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
VertexManipulator instance = (VertexManipulator)d;
UIElement oldInputSource = e.OldValue as UIElement;
UIElement newInputSource = e.NewValue as UIElement;
if (oldInputSource != null)
{
instance.UnregisterInputSource(oldInputSource);
}
if (newInputSource != null)
{
instance.RegisterInputSource();
}
}
