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);
}
