Flex Module通信(2)——使用事件

上一篇讨 论通过实现接口来实现Application和Modules的通信，本篇讨论通过使用事件实现Application和Modules的通信。在一个 swf中，组件间的交互通信可以直接使用addEventListener和dispatchEvent来完成事件的传递。当然这样的标准做法也适用于 Module。

      通过addEventListener和dispatchEvent在Module发布事件：

 1:  <?xml version="1.0" encoding="utf-8"?>

 2:  <mx:Module xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="onComplete()">

 3:   <mx:Script>

 4:   <![CDATA[

 5:              import mx.events.DynamicEvent;

 6:   

 7:              [Bindable]private var command:String="";

 8:              private function onComplete():void

 9:   {

                     //从Application订阅

10:                  var sharedEventDispatcher:IEventDispatcher=systemManager.loaderInfo.sharedEvents;

11:   

12:                  sharedEventDispatcher.addEventListener("init",onInit,false,0,true);

13:                  //通知Application：Module创建完成

14:                  sharedEventDispatcher.dispatchEvent(new Event(Event.COMPLETE));

15:              }

16:    

17:              private function onInit(event:DynamicEvent):void

18:   {

19:                  command=event.data as String;

20:              }

21:   

22:          ]]>

23:      </mx:Script>

24:   

25:   <mx:Panel id="panel" title="Module With Events. {command}" width="400"  height="200"/>

26:  </mx:Module>

27:   

 

        运行结果，LoadModule后显示从Application传入的内容：