flex(入门)之timer的使用,键盘,鼠标的监听

package
{
	import flash.display.Shape;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.KeyboardEvent;
	import flash.events.MouseEvent;
	import flash.events.TimerEvent;
	import flash.utils.Timer;
	
	import mx.controls.Label;
	//窗体大小，绘制帧率
	[SWF(width="400", height="300", frameRate="60")]
	public class MyDemo extends Sprite
	{
		private var circle:Shape;
		private var label:Label;
		private var timer:Timer;
		public function MyDemo()
		{
			label = new Label();
			label.x = 30;
			label.y = 30;
			addChild(label);
			circle = new Shape();
			circle.x = 50;
			circle.y = 100;
			addChild(circle);
			circle.graphics.beginFill(0xee2f2f);
			circle.graphics.drawCircle(circle.x,circle.y,40);
			circle.addEventListener(Event.ENTER_FRAME,changePos);//每帧调用changePos函数
			stage.addEventListener(MouseEvent.CLICK,onClick); //舞台上添加鼠标点击监听事件
			stage.addEventListener(KeyboardEvent.KEY_DOWN,keyDown);//舞台添加键盘监听
			timer = new Timer(1000,5); //设置延迟时间是1秒，循环执行5次timerExcute()
			timer.addEventListener(TimerEvent.TIMER,timerExcute);
			timer.addEventListener(TimerEvent.TIMER_COMPLETE,timerComplete);//执行完成后调用timerComplete
			timer.start();//启动timer
		}
		
		public function changePos(event:Event):void
		{
			if(circle.y >= 300)
			{
				circle.y = 1;
			}else if(0<circle.y && circle.y < 300)
			{	
				circle.y+=5;
			}
		}
		
		//在点击的地方产生绿色方形
		public function onClick(event:MouseEvent):void
		{
			var rect:Shape = new Shape();
			addChild(rect);
			rect.graphics.beginFill(0x11ff00);
			rect.graphics.drawRect(event.stageX,event.stageY,20,20);
		}
		
		
		public function keyDown(event:KeyboardEvent):void
		{
			var count:int = 0
			if(event.keyCode == 13) //监听Enter键
			{	
				var rect:Shape = new Shape();
				addChild(rect);
				rect.graphics.beginFill(0x00f1f0);
				rect.graphics.drawRect(Math.random()*400,Math.random()*300,10,10);
			}
		}
		
		public function timerExcute(event:TimerEvent)
		{
			var rect:Shape = new Shape();
			addChild(rect);
			rect.graphics.beginFill(0x0f11f0);
			rect.graphics.drawRect(Math.random()*400,Math.random()*300,10,10);
		}
		
		public function timerComplete(event:TimerEvent)
		{
			var rect:Shape = new Shape();
			addChild(rect);
			rect.graphics.beginFill(0x000000);
			rect.graphics.drawRect(Math.random()*400,Math.random()*300,30,60);
		}
	}
}

桌面程序Air效果图：