///<summary>
/// Broadcast Unloaded event starting at this node
/// </summary>
internal void FireUnloadedOnDescendentsInternal()
{
// This is to prevent duplicate Broadcasts for the Unloaded event
if (UnloadedPending == null)
{
DependencyObject parent = Parent;
if (parent == null)
{
parent = VisualTreeHelper.GetParent(this);
}
// Check if this Unloaded cancels against a previously queued Loaded event
// Note that if the Loaded and the Unloaded do not change the position of
// the node within the loagical tree they are considered to cancel each other out.
object[] loadedPending = LoadedPending;
if (loadedPending == null)
{
// Add a callback to the MediaContext which will be called
// before the first render after this point
BroadcastEventHelper.AddUnloadedCallback(this, parent);
}
else
{
// Dequeue Loaded
BroadcastEventHelper.RemoveLoadedCallback(this, loadedPending);
}
}
}
// Token: 0x06000308 RID: 776 RVA: 0x000086A8 File Offset: 0x000068A8
internal static object BroadcastLoadedEvent(object root)
{
DependencyObject dependencyObject = (DependencyObject)root;
object[] loadedPending = (object[])dependencyObject.GetValue(FrameworkElement.LoadedPendingProperty);
bool isLoaded = BroadcastEventHelper.IsLoadedHelper(dependencyObject);
BroadcastEventHelper.RemoveLoadedCallback(dependencyObject, loadedPending);
BroadcastEventHelper.BroadcastLoadedSynchronously(dependencyObject, isLoaded);
return(null);
}
// Token: 0x0600030D RID: 781 RVA: 0x000087B8 File Offset: 0x000069B8
private static bool OnBroadcastCallback(DependencyObject d, BroadcastEventHelper.BroadcastEventData data, bool visitedViaVisualTree)
{
DependencyObject root = data.Root;
RoutedEvent routedEvent = data.RoutedEvent;
List <DependencyObject> eventRoute = data.EventRoute;
if (FrameworkElement.DType.IsInstanceOfType(d))
{
FrameworkElement frameworkElement = (FrameworkElement)d;
if (frameworkElement != root && routedEvent == FrameworkElement.LoadedEvent && frameworkElement.UnloadedPending != null)
{
frameworkElement.FireLoadedOnDescendentsInternal();
}
else if (frameworkElement != root && routedEvent == FrameworkElement.UnloadedEvent && frameworkElement.LoadedPending != null)
{
BroadcastEventHelper.RemoveLoadedCallback(frameworkElement, frameworkElement.LoadedPending);
}
else
{
if (frameworkElement != root)
{
if (routedEvent == FrameworkElement.LoadedEvent && frameworkElement.LoadedPending != null)
{
BroadcastEventHelper.RemoveLoadedCallback(frameworkElement, frameworkElement.LoadedPending);
}
else if (routedEvent == FrameworkElement.UnloadedEvent && frameworkElement.UnloadedPending != null)
{
BroadcastEventHelper.RemoveUnloadedCallback(frameworkElement, frameworkElement.UnloadedPending);
}
}
if (frameworkElement.SubtreeHasLoadedChangeHandler)
{
frameworkElement.IsLoadedCache = (routedEvent == FrameworkElement.LoadedEvent);
eventRoute.Add(frameworkElement);
return(true);
}
}
}
else
{
FrameworkContentElement frameworkContentElement = (FrameworkContentElement)d;
if (frameworkContentElement != root && routedEvent == FrameworkElement.LoadedEvent && frameworkContentElement.UnloadedPending != null)
{
frameworkContentElement.FireLoadedOnDescendentsInternal();
}
else if (frameworkContentElement != root && routedEvent == FrameworkElement.UnloadedEvent && frameworkContentElement.LoadedPending != null)
{
BroadcastEventHelper.RemoveLoadedCallback(frameworkContentElement, frameworkContentElement.LoadedPending);
}
else
{
if (frameworkContentElement != root)
{
if (routedEvent == FrameworkElement.LoadedEvent && frameworkContentElement.LoadedPending != null)
{
BroadcastEventHelper.RemoveLoadedCallback(frameworkContentElement, frameworkContentElement.LoadedPending);
}
else if (routedEvent == FrameworkElement.UnloadedEvent && frameworkContentElement.UnloadedPending != null)
{
BroadcastEventHelper.RemoveUnloadedCallback(frameworkContentElement, frameworkContentElement.UnloadedPending);
}
}
if (frameworkContentElement.SubtreeHasLoadedChangeHandler)
{
frameworkContentElement.IsLoadedCache = (routedEvent == FrameworkElement.LoadedEvent);
eventRoute.Add(frameworkContentElement);
return(true);
}
}
}
return(false);
}
