public void AddListener <T>(EventHandler <T> listener) where T : EventArgs
{
var eventType = typeof(T);
var key = new BroadcastHandlerKey(eventType, listener);
if (_delegateLookup.ContainsKey(key))
{
return;
}
EventHandler internalDelegate = (s, e) => listener(s, (T)e);
_delegateLookup[key] = internalDelegate;
EventHandler invoker;
if (_delegates.TryGetValue(eventType, out invoker))
{
invoker += internalDelegate;
_delegates[eventType] = invoker;
}
else
{
_delegates[eventType] = internalDelegate;
}
}
public void RemoveListener <T>(EventHandler <T> listener) where T : EventArgs
{
var eventType = typeof(T);
var key = new BroadcastHandlerKey(eventType, listener);
EventHandler internalDelegate;
if (_delegateLookup.TryGetValue(key, out internalDelegate))
{
EventHandler invoker;
if (_delegates.TryGetValue(eventType, out invoker))
{
invoker -= internalDelegate;
if (invoker == null)
{
_delegates.Remove(eventType);
}
else
{
_delegates[eventType] = invoker;
}
}
_delegateLookup.Remove(key);
}
}
protected bool Equals(BroadcastHandlerKey other)
{
return(_eventType == other._eventType && _handler == other._handler);
}
