/// <summary>
/// Registers an predefined event handler that works with a weak reference to the target object.
/// Access to the event and to the real event handler is done through lambda expressions.
/// The code holds strong references to these expressions, so they must not capture any
/// variables!
/// </summary>
/// </example>
public static WeakEventHandler Register <TEventSource, TEventListener>(
TEventSource senderObject,
Action <TEventSource, TEventHandler> registerEvent,
Action <TEventSource, TEventHandler> deregisterEvent,
TEventListener listeningObject,
Action <TEventListener, object, TEventArgs> forwarderAction
)
where TEventSource : class
where TEventListener : class
{
if (senderObject == null)
{
throw new ArgumentNullException("senderObject");
}
if (listeningObject == null)
{
throw new ArgumentNullException("listeningObject");
}
WeakEventHandler.VerifyDelegate(registerEvent, "registerEvent");
WeakEventHandler.VerifyDelegate(deregisterEvent, "deregisterEvent");
WeakEventHandler.VerifyDelegate(forwarderAction, "forwarderAction");
WeakEventHandler weh = new WeakEventHandler(listeningObject);
TEventHandler eh = MakeDeregisterCodeAndWeakEventHandler(weh, senderObject, deregisterEvent, forwarderAction);
registerEvent(senderObject, eh);
return(weh);
}
