flex 透明MenuBar效果的实现

MenuBarNoBorderFillSkin.as

import mx.skins.ProgrammaticSkin;
	import flash.display.Graphics;
	
	public class MenuBarNoBorderFillSkin extends ProgrammaticSkin{
		public function MenuBarNoBorderFillSkin(){
			super();
		}
	}

----实现无边框

MenuBarActiveSkin.as

import mx.skins.ProgrammaticSkin;
	
	public class MenuBarActiveSkin extends ProgrammaticSkin{
		public function MenuBarActiveSkin(){
			super();
		}
		override protected function updateDisplayList(w:Number,h:Number):void{
			var backgroundAlpha:Number = getStyle("backgroundAlpha");
			var rollOverColor:uint=getStyle("rollOverColor");
			graphics.clear();
			
			drawRoundRect(0,w,h,5,rollOverColor,backgroundAlpha);
		}
	}

---实现点击事件监听