implements IEventDispatcher, for when you can't subclass EventDispatcher directly

ComposedEventDispatcher.as

///// IN IMPORTS
import flash.events.IEventDispatcher;
import flash.events.EventDispatcher;
/////

///// IN CLASS DECLARATION:
implements IEventDispatcher
/////

///// IN CONSTRUCTOR:
this.dispatcher = new EventDispatcher(this);    
/////	

private var dispatcher:EventDispatcher;

public function willTrigger(type:String):Boolean
{
    return dispatcher.willTrigger(type);
}

public function dispatchEvent(event:Event):Boolean
{
    return dispatcher.dispatchEvent(event);
}

public function addEventListener(type:String, listener:Function, useCapture:Boolean=false, priority:int=0, useWeakReference:Boolean=false):void
{
    dispatcher.addEventListener(type, listener, useCapture, priority, useWeakReference);
}

public function hasEventListener(type:String):Boolean
{
    return dispatcher.hasEventListener(type);	
}

public function removeEventListener(type:String, listener:Function, useCapture:Boolean=false):void
{
    dispatcher.removeEventListener(type, listener, useCapture);		
}