<?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"

               applicationComplete="onApplicationComplete(event)">

    <fx:Script>

        <![CDATA[

            import mx.controls.Alert;

            import mx.events.FlexEvent;

            private var timer:Timer = new Timer(10,0);

            protected function onApplicationComplete(event:FlexEvent):void{

                stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDown1);

                timer.addEventListener(TimerEvent.TIMER,ballMover);

            }

            protected function ballMover(event:TimerEvent):void{

                circle.x += 5;

                if(circle.x+100 >=stage.stageWidth){

                    trace('finished');

                    timer.stop();

                    Alert.show('Finished','PoweredCircle');

                }

            }

            protected function keyDown1(event:KeyboardEvent):void{

                // 必须点击主页面，获取焦点之后，才能捕获键盘事件；

                trace(event.toString());

                if(event.keyCode == 13){

                    timer.start();

                }

            }

        ]]>

    </fx:Script>

    <fx:Declarations>

        <!-- 将非可视元素（例如服务、值对象）放在此处 -->

    </fx:Declarations>

    <s:Group id="circle">

        <s:Ellipse width="100" height="100">

            <s:fill>

                <s:SolidColor color="#009900">

                </s:SolidColor>

            </s:fill>

            <s:stroke>

                <s:SolidColorStroke color="#000000" weight="2">

                </s:SolidColorStroke>

            </s:stroke>

        </s:Ellipse>

    </s:Group>

</s:Application>