private void AddToEventRouteImpl(EventRoute route, RoutedEventArgs args)
{
//
// add class listeners then instance listeners.
//
Hashtable store = _classEventHandlersStore;
RoutedEvent evt = args._routedEvent;
for (int repeat = 0; repeat < 2; repeat++)
{
if (store != null)
{
ArrayList eventListeners = (ArrayList)store[evt];
// Add all listeners for this UIElement
if (eventListeners != null)
{
for (int i = 0, count = eventListeners.Count; i < count; i++)
{
RoutedEventHandlerInfo eventListener = (RoutedEventHandlerInfo)eventListeners[i];
route.Add(this, eventListener._handler, eventListener._handledEventsToo);
}
}
}
store = _instanceEventHandlersStore;
}
}
/// <summary>
/// Add the event handlers for this element to the route.
/// </summary>
// REFACTOR -- do we need this to be public?
public void AddToEventRoute(EventRoute route, RoutedEventArgs args)
{
if (route == null || args == null)
throw new ArgumentNullException();
AddToEventRouteImpl(route, args);
}
/// <summary>
/// Raise the events specified by
/// <see cref="RoutedEventArgs.RoutedEvent"/>
/// </summary>
/// <remarks>
/// This method is a shorthand for
/// This method walks up the visual tree, calling
/// <see cref="UIElement.BuildRouteCore"/>
/// on every <see cref="UIElement"/> <para/>
/// <para/>
///
/// NOTE: The RoutedEvent in RoutedEventArgs
/// and EventRoute must be matched
///
/// Once the route is built, it calls InvokeHandlers()
/// </remarks>
/// <param name="args">
/// <see cref="RoutedEventArgs"/> for the event to
/// be raised
/// </param>
public void RaiseEvent(RoutedEventArgs args)
{
if (args == null)
throw new ArgumentNullException();
EventRoute route = new EventRoute(args._routedEvent);
// Set Source
args.Source = this;
// direct.
if (args._routedEvent._routingStrategy == RoutingStrategy.Direct)
{
AddToEventRouteImpl(route, args);
}
else
{
int cElements = 0;
UIElement uiElement = this;
do
{
// Protect against infinite loops by limiting the number of elements
// that we will process.
if (cElements++ > MAX_ELEMENTS_IN_ROUTE)
{
throw new InvalidOperationException(/*SR.Get(SRID.TreeLoop) */);
}
uiElement.AddToEventRouteImpl(route, args);
uiElement = uiElement._parent;
} while (uiElement != null);
}
route.InvokeHandlers(this, args);
// Reset Source to OriginalSource
args.Source = args.OriginalSource;
}