private static void InvokeEventHandlers(UIElement source, RoutedEventArgs args)
{
args.Source = source;
foreach (var handler in GlobalEventManager.GetTypedClassEventHandlers(source.GetType(), args.RoutedEvent))
{
handler.InvokeHandler(source, args);
}
List<RoutedEventHandlerInfo> handlers;
if (source._eventHandlerDictionary.TryGetValue(args.RoutedEvent, out handlers))
{
foreach (var handler in handlers)
{
handler.InvokeHandler(source, args);
}
}
}
private static void RaiseEventImpl(UIElement sender, RoutedEventArgs args)
{
args.Source = sender;
Visual visual;
switch (args.RoutedEvent.RoutingStrategy)
{
case RoutingStrategy.Direct:
InvokeEventHandlers(sender, args);
break;
case RoutingStrategy.Bubble:
visual = sender;
while (visual != null)
{
var uiElement = visual as UIElement;
if (uiElement != null)
InvokeEventHandlers(uiElement, args);
visual = visual.VisualParent;
}
break;
case RoutingStrategy.Tunnel:
var stack = new List<UIElement>();
visual = sender;
while (visual != null)
{
var uiElement = visual as UIElement;
if (uiElement != null)
stack.Add(uiElement);
visual = visual.VisualParent;
}
for (int n = stack.Count - 1; n >= 0; --n)
{
InvokeEventHandlers(stack[n], args);
}
break;
}
}
public void RaiseEvent(RoutedEventArgs args)
{
if (args == null) throw new ArgumentNullException("args");
RaiseEventImpl(this, args);
}
protected static void ReRaiseEventAs(UIElement sender, RoutedEventArgs args, RoutedEvent newEvent)
{
if(sender == null)
return;
if (args == null) throw new ArgumentNullException("args");
if (newEvent == null) throw new ArgumentNullException("newEvent");
var oldEvent = args.RoutedEvent;
try
{
args.RoutedEvent = newEvent;
RaiseEventImpl(sender, args);
}
finally
{
args.RoutedEvent = oldEvent;
}
}
internal void InvokeHandler(object target, RoutedEventArgs routedEventArgs)
{
if (routedEventArgs.Handled && !HandledEventsToo)
return;
if (CommandStencilHandler != null)
{
CommandStencilHandler.Execute(new Object[] { target, routedEventArgs });
}
else
{
var handler = Handler as RoutedEventHandler;
if (handler != null)
{
handler(target, routedEventArgs);
}
else
{
Handler.DynamicInvoke(target, routedEventArgs);
}
}
}
