几个不同颜色方框——事件流

package {
	import flash.display.Sprite;
	import flash.events.MouseEvent;
	public class Main extends Sprite {
		public function Main():void {
			var a:Sprite=new Sprite();
			drawSprite(a,200,200,0x00ff00,0,0);
			a.name="外层";
			var b:Sprite=new Sprite();
			drawSprite(b,100,100,0xff0000,50,50);
			b.name="中层";
			var c:Sprite=new Sprite();
			drawSprite(c,50,50,0x0000ff,75,75);
			c.name="内层";
			addChild(a);
			a.addChild(b);
			b.addChild(c);
			a.addEventListener(MouseEvent.CLICK,look);
			b.addEventListener(MouseEvent.CLICK,look);
			c.addEventListener(MouseEvent.CLICK,look);
		}
		private function look(evt:MouseEvent):void {
			trace("发生事件的对象："+evt.target.name);
			trace("正在侦听事件的目标："+evt.currentTarget.name);
			trace("当前帧听的阶段："+evt.eventPhase);
			trace("================");
		}
		private function drawSprite(obj:Sprite,w:uint,h:uint,color:uint,X:uint,Y:uint) {
			obj.graphics.beginFill(color);
			obj.graphics.drawRect(X,Y,w,h);
			obj.graphics.endFill();
		}
	}
}