ENTER_FRAME事件做进度条

package
{
/**
 * @author zoe
 *
 */
import flash.display.Sprite;
import flash.events.Event;

public class Main extends Sprite
{
    private var rect:Sprite;
    private var bar:Sprite;
    public function Main()
    {
        init();
    }
    
    private function init():void
    {
        rect = new Sprite();
        rect.graphics.lineStyle(1,0xff6699);
//        rect.graphics.beginFill(0x00ff00);
        rect.graphics.drawRect(0,0,200,30);
        rect.graphics.endFill();
        rect.x = 50;
        rect.y = 300;
        addChild(rect);
        
        bar = new Sprite();
        bar.graphics.beginFill(0x00ff00);
        bar.graphics.drawRect(0,0,1,29);
        bar.graphics.endFill();
        addChild(bar);
        bar.x = 51;
        bar.y = 301;
        
        addEventListener(Event.ENTER_FRAME,efHandler);
        
    
    }
    
    protected function efHandler(event:Event):void
    {
        // TODO Auto-generated method stub
        bar.width+= 2;
        if(bar.width >=rect.width-2)
        {
            bar.width = rect.width-2;
            removeEventListener(Event.ENTER_FRAME,efHandler);
        }
    }
}
}