Super Flex

package org.gl.geom.abstract 
{
	import flash.events.Event;
 
	/**
	 * ...
	 * @author Jonson
	 */
	public interface IBubbleDispatcher 
	{
		/**
		 * add to bubble tree
		 * 
		 * @param	child
		 * @param	father
		 */
		function registerAsMyChild(child:IBubbleDispatcher):void;
 
		/**
		 * dispatch event, then bubble
		 * 
		 * @param	event
		 */
		function bubble(event:Event):void;
 
		/**
		 * it's better to be override in subclass
		 * 
		 * @param	event
		 * @return	true means continue bubble
		 */
		function myBubbleEventHandler(event:Event):Boolean
	}
 
}

package org.gl.geom.abstract 
{
	import flash.events.Event;
 
	/**
	 * ...
	 * @author Jonson
	 */
	public class BubbleDispatcher implements IBubbleDispatcher
	{
		//////////////////////////////////////////////////
		// render event bubble
 
		private var __my_parent__:IBubbleDispatcher;
 
		/**
		 * add to bubble tree
		 * 
		 * @param	child
		 * @param	father
		 */
		public function registerAsMyChild(child:IBubbleDispatcher):void
		{
			if (child is BubbleDispatcher)
			{
				(child as BubbleDispatcher).__my_parent__ = this;
			}
		}
 
		/**
		 * dispatch event, then bubble
		 * 
		 * @param	event
		 */
		public function bubble(event:Event):void
		{
			if (__my_parent__)
			{
				var neve:Event = event.clone();
				if (__my_parent__.myBubbleEventHandler(neve))
				{
					__my_parent__.bubble(neve);
				}
			}
		}
 
		/**
		 * it's better to be override in subclass
		 * 
		 * @param	event
		 * @return	true means continue bubble
		 */
		public function myBubbleEventHandler(event:Event):Boolean
		{
			//it's better to be override in subclass
			return true;
		}
	}
}

class parent1Class extends CBubbleDispatcher
{
      public function parent1Class(){this.registerAsMyChild(_child);}
      private var _child:parent2Class = new parent2Class();
}
class parent2Class extends CBubbleDispatcher
{
      public function parent2Class(){this.registerAsMyChild(_child);}
      private var _child:childClass = new childClass();
}
class childClass extends CBubbleDispatcher
{
      public function try():void{this.bubble(new Event("UP"))};
}