public static RoutedEvent RegisterRoutedEvent(string name, RoutingStrategy routingStrategy, Type handlerType, Type ownerType)
{
if (string.IsNullOrEmpty(name))
{
throw new ArgumentException("name");
}
if (null == handlerType)
{
throw new ArgumentNullException("handlerType");
}
if (null == ownerType)
{
throw new ArgumentNullException("ownerType");
}
//
RoutedEventKey key = new RoutedEventKey(name, ownerType);
if (routedEvents.ContainsKey(key))
{
throw new InvalidOperationException("This routed event is already registered.");
}
RoutedEvent routedEvent = new RoutedEvent(handlerType, name, ownerType, routingStrategy);
RoutedEventInfo routedEventInfo = new RoutedEventInfo(routedEvent);
routedEvents.Add(key, routedEventInfo);
return(routedEvent);
}
public static void AddHandler(object target, RoutedEvent routedEvent, Delegate handler, bool handledEventsToo)
{
if (null == target)
{
throw new ArgumentNullException("target");
}
if (null == routedEvent)
{
throw new ArgumentNullException("routedEvent");
}
if (null == handler)
{
throw new ArgumentNullException("handler");
}
//
RoutedEventKey key = routedEvent.Key;
if (!routedEvents.ContainsKey(key))
{
throw new ArgumentException("Specified routed event is not registered.", "routedEvent");
}
RoutedEventInfo routedEventInfo = routedEvents[key];
bool needAddTarget = true;
if (routedEventInfo.targetsList != null)
{
RoutedEventTargetInfo targetInfo = routedEventInfo.targetsList.FirstOrDefault(info => info.target == target);
if (null != targetInfo)
{
if (targetInfo.handlersList == null)
{
targetInfo.handlersList = new List <DelegateInfo>();
}
targetInfo.handlersList.Add(new DelegateInfo(handler, handledEventsToo));
needAddTarget = false;
}
}
if (needAddTarget)
{
RoutedEventTargetInfo targetInfo = new RoutedEventTargetInfo(target);
targetInfo.handlersList = new List <DelegateInfo>();
targetInfo.handlersList.Add(new DelegateInfo(handler, handledEventsToo));
if (routedEventInfo.targetsList == null)
{
routedEventInfo.targetsList = new List <RoutedEventTargetInfo>();
}
routedEventInfo.targetsList.Add(targetInfo);
}
}
/// <summary>
/// Возвращает список таргетов, подписанных на указанное RoutedEvent.
/// </summary>
private static List <RoutedEventTargetInfo> getTargetsSubscribedTo(RoutedEvent routedEvent)
{
if (null == routedEvent)
{
throw new ArgumentNullException("routedEvent");
}
RoutedEventKey key = routedEvent.Key;
if (!routedEvents.ContainsKey(key))
{
throw new ArgumentException("Specified routed event is not registered.", "routedEvent");
}
RoutedEventInfo routedEventInfo = routedEvents[key];
return(routedEventInfo.targetsList);
}
public static void RemoveHandler(object target, RoutedEvent routedEvent, Delegate handler)
{
if (null == target)
{
throw new ArgumentNullException("target");
}
if (null == routedEvent)
{
throw new ArgumentNullException("routedEvent");
}
if (null == handler)
{
throw new ArgumentNullException("handler");
}
//
RoutedEventKey key = routedEvent.Key;
if (!routedEvents.ContainsKey(key))
{
throw new ArgumentException("Specified routed event is not registered.", "routedEvent");
}
RoutedEventInfo routedEventInfo = routedEvents[key];
if (routedEventInfo.targetsList == null)
{
throw new InvalidOperationException("Targets list is empty.");
}
RoutedEventTargetInfo targetInfo = routedEventInfo.targetsList.FirstOrDefault(info => info.target == target);
if (null == targetInfo)
{
throw new ArgumentException("Target not found in targets list of specified routed event.", "target");
}
if (null == targetInfo.handlersList)
{
throw new InvalidOperationException("Handlers list is empty.");
}
int findIndex = targetInfo.handlersList.FindIndex(info => info.@delegate == handler);
if (-1 == findIndex)
{
throw new ArgumentException("Specified handler not found.", "handler");
}
targetInfo.handlersList.RemoveAt(findIndex);
}
