actionscript 绘制环形(中空)图形

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:supportClasses="com.esri.ags.skins.supportClasses.*"
		
			   minWidth="955" minHeight="600">
	<s:layout>
		<s:BasicLayout />
	</s:layout>
	<fx:Script>
		<![CDATA[
			import mx.events.FlexEvent;
			

			protected function application1_creationCompleteHandler(event:FlexEvent):void
			{
				// 利用flex 的缠绕规则 做中空多边形 相见《flash_as3_中文帮助》278页
				
				var commands:Vector.<int>=new Vector.<int>(); 
				var lineto:int=GraphicsPathCommand.LINE_TO; //命令：画线到 
				var moveto:int=GraphicsPathCommand.MOVE_TO; //命令：移动到
				commands.push(moveto,lineto,lineto,lineto,lineto); 
				commands.push(moveto,lineto,lineto,lineto,lineto); 
				
				var datas:Vector.<Number>=new Vector.<Number>(); 
				datas.push(50,50, 50,400, 400,400, 400,50, 50,50); //图形1 逆时针描述路径
				
				datas.push(200,200, 200,100, 300,100, 300,300, 200,300); //图形2 顺时针描述路径
				  
				apn. graphics.beginFill(0xff0000); 
				//GraphicsPathWinding.NON_ZERO 相交处不填充
				apn. graphics.drawPath(commands,datas,GraphicsPathWinding.NON_ZERO); 
				apn. graphics.endFill(); 
				
				  
				 
			}

		]]>
	</fx:Script>
	<fx:Declarations>
		<!-- 将非可视元素（例如服务、值对象）放在此处 -->
		<s:SolidColorStroke color="0xff0000" weight="2" id="stroke" />
	</fx:Declarations>
	<!--<s:Path data="M0 0 60 0 60 60 0 60Z" stroke="{stroke}"/>-->
	<s:Group  width="200" height="200" id="apn"  	   creationComplete="application1_creationCompleteHandler(event)"/>
	<mx:Text text="测试" x="250" y="250" />
</s:Application>