private static void AutoLayoutContentPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
VisualBrush target = ((VisualBrush)d);
target.PropertyChanged(AutoLayoutContentProperty);
}
//------------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
private static void VisualPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
VisualBrush target = ((VisualBrush)d);
Visual oldV = (Visual)e.OldValue;
//
// If the Visual required layout but it is changed before we do Layout
// on that Visual, then we dont want the async LayoutCallback method to run,
// nor do we want the LayoutUpdated handler to run. So we abort/remove them.
//
if (target._pendingLayout)
{
//
// Visual has to be a UIElement since _pendingLayout flag is
// true only if we added the LayoutUpdated handler which can
// only be done on UIElement.
//
UIElement element = (UIElement)oldV;
Debug.Assert(element != null);
element.LayoutUpdated -= target.OnLayoutUpdated;
Debug.Assert(target._DispatcherLayoutResult != null);
Debug.Assert(target._DispatcherLayoutResult.Status == System.Windows.Threading.DispatcherOperationStatus.Pending);
bool abortStatus = target._DispatcherLayoutResult.Abort();
Debug.Assert(abortStatus);
target._pendingLayout = false;
}
Visual newV = (Visual)e.NewValue;
System.Windows.Threading.Dispatcher dispatcher = target.Dispatcher;
if (dispatcher != null)
{
DUCE.IResource targetResource = (DUCE.IResource)target;
using (CompositionEngineLock.Acquire())
{
int channelCount = targetResource.GetChannelCount();
for (int channelIndex = 0; channelIndex < channelCount; channelIndex++)
{
DUCE.Channel channel = targetResource.GetChannel(channelIndex);
Debug.Assert(!channel.IsOutOfBandChannel);
Debug.Assert(!targetResource.GetHandle(channel).IsNull);
target.ReleaseResource(oldV, channel);
target.AddRefResource(newV, channel);
}
}
}
target.PropertyChanged(VisualProperty);
}
