2012、9、28 听课笔记

                                                                       事件流机制

首先，建立6个不同的元件，分别起元件名字为m1，m2，m3，m4，m5，m6，然后写下如下代码：

function childMCTrace(evt:MouseEvent)

{

          trace("childTrace",'我是:'+evt.currentTarget.name); 

          trace('事件所处阶段：'+evt.eventPhase);

          trace('----------------------------------------------------------');

}

function anotherMCTrace(evt:MouseEvent)

{

         trace("anotherTrace",'我是:'+evt.currentTarget.name); 

         trace('事件所处阶段：'+evt.eventPhase);

         trace('----------------------------------------------------------');

}

function parentMCTrace(evt:MouseEvent)

{

         trace("parentTrace",'我是:'+evt.currentTarget.name); 

         trace('事件所处阶段：'+evt.eventPhase);

         trace('----------------------------------------------------------');

}

function captureTrace(evt:MouseEvent)

{

            trace("captureTrace",'我是:'+evt.currentTarget.name); 

            trace('事件所处阶段：'+evt.eventPhase);

            trace('----------------------------------------------------------');

}

function stageTrace(evt:MouseEvent)

{

                trace("stageTrace",'我是:'+evt.currentTarget.name); 

                trace('事件所处阶段：'+evt.eventPhase);

                trace('----------------------------------------------------------');

}

function stageTrace1(evt:MouseEvent)

{

       trace("stageTrace",'我是:'+evt.currentTarget.name); 

       trace('事件所处阶段：'+evt.eventPhase);

       trace('----------------------------------------------------------');

}

function stageTrace2(evt:MouseEvent)

{

          trace("stageTrace",'我是:'+evt.currentTarget.name); 

          trace('事件所处阶段：'+evt.eventPhase);

          trace('----------------------------------------------------------');

}

function stageTrace3(evt:MouseEvent)

{

           trace("stageTrace",'我是:'+evt.currentTarget.name); 

           trace('事件所处阶段：'+evt.eventPhase);

           trace('----------------------------------------------------------');

}

m1.addEventListener(MouseEvent.MOUSE_DOWN,captureTrace,true);//捕获到

m1.addEventListener(MouseEvent.MOUSE_DOWN,parentMCTrace);

m1.m2.addEventListener(MouseEvent.MOUSE_DOWN,childMCTrace);

m1.m2.m3.addEventListener(MouseEvent.MOUSE_DOWN,anotherMCTrace);

m1.m2.m3.m4.addEventListener(MouseEvent.MOUSE_DOWN,stageTrace);

m1.m2.m3.m4.m5.addEventListener(MouseEvent.MOUSE_DOWN,stageTrace1);

m1.m2.m3.m4.m5.m6.addEventListener(MouseEvent.MOUSE_DOWN,stageTrace2);

stage.addEventListener(MouseEvent.MOUSE_DOWN,stageTrace3);

（这节课可以上我们懂得事件的触发顺序，以及什么是行为事件、目标事件、冒泡事件。）

                                                    启动上机时间的小程序

import flash.utils.Timer;

import flash.events.TimerEvent;

var timer:Timer=new Timer(50);

timer.start();

timer.addEventListener(TimerEvent.TIMER,onTimerHandler);

function onTimerHandler(e:TimerEvent):void

{

     var time:int=getTimer();

     var str:String=uint(time/1000/3600)+'小时'+uint(time/1000%3600/60)+'分钟'+time/1000%60+'秒'  txt.text=str

}

                               倒计时的制作（以系统时间作为基准）

package
{
 import flash.display.Sprite;
 import flash.events.TimerEvent;
 import flash.text.TextField;
 import flash.utils.Timer;
 import flash.display.Loader;
 import flash.net.URLRequest;
 import flash.events.Event;
 import flash.events.MouseEvent;
 
 public class Main2 extends Sprite
 {
  private var timer:Timer;
  private var num:Number;
  private var txt:TextField;
  private var txt1:TextField;
  private var loader:Loader;
  public function Main2()
  {
   num = 0;
   timer = new Timer(1);
   //trace(timer.running);
   timer.start();
   txt = new TextField();
   stage.addChild(txt);
   txt.x = 100;
   txt.y = 50;
   txt.width = 100;
   txt.height = 30;
   txt.border = true;
   txt.selectable = false;
   txt.text = "倒计时";
   loader = new Loader();
   loader.load(new URLRequest("001.jpg"));
   loader.contentLoaderInfo.addEventListener(Event.COMPLETE,onLoaderInfoHandler);
   
   txt1 = new TextField();
   stage.addChild(txt1);
   txt1.x = 100;
   txt1.y = 100;
   txt1.width = 350;
   txt1.height = 30;
   txt1.border = true;
   txt1.selectable = false;
   txt1.text = "倒计时：";
   timer.addEventListener(TimerEvent.TIMER,onTimerHandler);
   timer.addEventListener(TimerEvent.TIMER_COMPLETE,onTimerCompleteHandler);
  }
  private function onLoaderInfoHandler(event:Event):void
  {
    stage.addChild(loader);
    loader.addEventListener(MouseEvent.CLICK,onLoaderHandler);
  }
  
  private function onLoaderHandler(event:MouseEvent):void
  {
      txt1.appendText(txt.text + "/")
  }
  private function onTimerCompleteHandler(event:TimerEvent):void
  {
     trace("计时完成！");
  }
  protected function onTimerHandler(event:TimerEvent):void
  {
   txt.text = String(timer.currentCount);
          //num++;
    //if (num == 5)
    //{
      // timer.stop();
    //}
    //trace(num);
  }
 }

}