private static void OnIDChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if ((e.NewValue == null) || !(d is UIElement))
{
return;
}
SwitchPresenter parentPresenter = VisualTreeHelperEx.FindAncestorByType <SwitchPresenter>(d);
if (parentPresenter != null)
{
parentPresenter.RegisterID(e.NewValue as string, d as FrameworkElement);
}
else
{
d.Dispatcher.BeginInvoke(DispatcherPriority.Loaded,
(ThreadStart) delegate()
{
parentPresenter = VisualTreeHelperEx.FindAncestorByType <SwitchPresenter>(d);
if (parentPresenter != null)
{
parentPresenter.RegisterID(e.NewValue as string, d as FrameworkElement);
}
});
}
}
internal void UnregisterPresenter(SwitchPresenter presenter, DependencyObject container)
{
if (container != null)
{
_presenters.Remove(presenter);
presenter.SwapTheTemplate(null, false);
}
}
private static void OnLoaded(object sender, RoutedEventArgs e)
{
SwitchPresenter sp = sender as SwitchPresenter;
if (sp._switchRoot == null)
{
sp.SwitchParent = VisualTreeHelperEx.FindAncestorByType(sp, typeof(SwitchPanel), false) as SwitchPanel;
}
}
protected override Size MeasureOverride(Size constraint)
{
// if first pass, resolve SwitchParent
if (!_isMeasured && _switchRoot == null)
{
SwitchPresenter.OnLoaded(this, null);
_isMeasured = true;
}
_contentPresenter.Measure(constraint);
return(_contentPresenter.DesiredSize);
}
internal UIElement RegisterPresenter(SwitchPresenter presenter)
{
UIElement result = null;
AnimationPanel ignore;
result = AnimationPanel.FindAncestorChildOfAnimationPanel(presenter, out ignore);
if (result != null)
{
_presenters.Add(presenter);
presenter.SwapTheTemplate(ActiveSwitchTemplate, false);
}
return(result);
}
internal void UnregisterPresenter( SwitchPresenter presenter, DependencyObject container )
{
if( container != null )
{
_presenters.Remove( presenter );
presenter.SwapTheTemplate( null, false );
}
}
internal UIElement RegisterPresenter( SwitchPresenter presenter )
{
UIElement result = null;
AnimationPanel ignore;
result = AnimationPanel.FindAncestorChildOfAnimationPanel( presenter, out ignore );
if( result != null )
{
_presenters.Add( presenter );
presenter.SwapTheTemplate( ActiveSwitchTemplate, false );
}
return result;
}
internal Dictionary<string, Rect> GetNewLocationsBasedOnTargetPlacement( SwitchPresenter presenter, UIElement parent )
{
ChildState state = AnimationPanel.GetChildState( parent );
// if necessary, temporarily arrange the element at its final placement
bool rearrange = ( state.CurrentPlacement != state.TargetPlacement && state.IsAnimating );
if( rearrange )
{
parent.Arrange( state.TargetPlacement );
}
// now create a dictionary of locations for ID'd elements
Dictionary<string, Rect> result = new Dictionary<string, Rect>();
foreach( KeyValuePair<string, FrameworkElement> entry in presenter._knownIDs )
{
Size size = entry.Value.RenderSize;
Point[] points = { new Point(), new Point( size.Width, size.Height ) };
( entry.Value.TransformToAncestor( VisualTreeHelper.GetParent( entry.Value ) as Visual ) as MatrixTransform ).Matrix.Transform( points );
result[ entry.Key ] = new Rect( points[ 0 ], points[ 1 ] );
}
// restore the current placement
if( rearrange )
{
parent.Arrange( state.CurrentPlacement );
}
return result;
}
