/// <summary>
/// Unsubscribes from an event.
/// </summary>
/// <typeparam name="T">The event type to unsubscribe from</typeparam>
/// <param name="del">The delegate to remove</param>
public static void Unsubscribe <T>(GenericEventDelegate <T> del) where T : BaseEvent
{
if (del == null)
{
return;
}
//Get the non-generic subscribed delegate
EventDelegate internalDelegate;
if (subscriberDelegates.TryGetValue(del, out internalDelegate))
{
//Get the corresponding multicast delegate and remove the non-generic delegate from it
EventDelegate tempDel;
if (dispatchDelegates.TryGetValue(typeof(T), out tempDel))
{
tempDel -= internalDelegate;
if (tempDel == null)
{
dispatchDelegates.Remove(typeof(T));
}
else
{
dispatchDelegates[typeof(T)] = tempDel;
}
}
//Remove the non-generic subscribed delegate
subscriberDelegates.Remove(del);
}
}
/// <summary>
/// Subscribes to an event.
/// </summary>
/// <typeparam name="T">The event type to subscribe to</typeparam>
/// <param name="del">The delegate to add to the event's callbacks</param>
public static void Subscribe <T>(GenericEventDelegate <T> del) where T : BaseEvent
{
if (del == null)
{
return;
}
if (subscriberDelegates.ContainsKey(del))
{
return;
}
// Create a new non-generic delegate which calls our generic one
EventDelegate internalDelegate = (e) => del(( T )e);
subscriberDelegates[del] = internalDelegate;
//Add the non-generic delegate to the dispatch delegates
EventDelegate tempDel;
if (dispatchDelegates.TryGetValue(typeof(T), out tempDel))
{
dispatchDelegates[typeof(T)] = tempDel += internalDelegate;
}
else
{
dispatchDelegates[typeof(T)] = internalDelegate;
}
}