internal void OnSourcePropertyChanged(object o, string propName)
{
int level;
// ignore changes that don't affect this binding.
// This test must come before any marshalling to the right context (bug 892484)
if (!IgnoreSourcePropertyChange && (level = PW.LevelForPropertyChange(o, propName)) >= 0)
{
// if notification was on the right thread, just do the work (normal case)
if (Dispatcher.Thread == Thread.CurrentThread)
{
PW.OnPropertyChangedAtLevel(level);
}
else
{
// otherwise invoke an operation to do the work on the right context
SetTransferIsPending(true);
if (ParentBindingExpression.TargetWantsCrossThreadNotifications)
{
LiveShapingItem lsi = TargetElement as LiveShapingItem;
if (lsi != null)
{
lsi.OnCrossThreadPropertyChange(TargetProperty);
}
}
Engine.Marshal(
new DispatcherOperationCallback(ScheduleTransferOperation),
null);
}
}
}