private NonGenericEventDelegate AddDelegate <T>(EventDelegate <T> del) where T : GameEvent
{
// Early-out if we've already registered this delegate
if (delegateLookup.ContainsKey(del))
{
return(null);
}
// Create a new non-generic delegate which calls our generic one.
// This is the delegate we actually invoke.
NonGenericEventDelegate internalDelegate = (GameEvent evt) => {
del.Invoke(evt as T);
};
delegateLookup[del] = internalDelegate;
Type type = typeof(T);
NonGenericEventDelegate tempDel;
if (delegates.TryGetValue(type, out tempDel))
{
delegates[type] = tempDel += internalDelegate;
}
else
{
delegates[type] = internalDelegate;
}
return(internalDelegate);
}
public void AddListenerOnce <T>(EventDelegate <T> del) where T : GameEvent
{
NonGenericEventDelegate result = AddDelegate <T>(del);
if (result != null)
{
// remember this is only called once
onceLookups[result] = true;
}
}
public void AddListenerOnce <T>(EventDelegate <T> del) where T : GameEvent
{
EventDelegate <T> fn = null;
fn = (T evt) => {
del(evt);
RemoveListener(fn);
};
NonGenericEventDelegate result = AddDelegate(fn);
}