flex中dispatchEvent的用法(自定义事件)

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在已经了解了事件的机制，明白了事件的注册，侦听，触发过程后，再看自定义事件就比较简单了。示例如下：

先写自定义的事件类（继承Event类）：

?

 
 

package?events ?
  
  
{ ?
  
  
????import?flash.events.Event; ?
  
  
???? ?
  
  
????public?class?TransInfoEvent?extends?Event ?
  
  
????{ ?
  
  
????????public?var?username:String; ?
  
  
????????public?var?pwd:String; ?
  
  
???????? ?
  
  

????????public?static?var?Tag:String?=?"123"; ?

  
  
????????public?function?TransInfoEvent(type:String,?username:String,pwd:String) ?
  
  
????????{ ?
  
  
????????????super(type); ?
  
  

????????????this.username=username; ?

  
  

????????????this.pwd=pwd; ?

  
  
???????????? ?
  
  
????????} ?
  
  
????} ?
  
  
}?
 
 

然后是事件的发送（红色字体内容）用dispatchEvent（）方法：

 
 

package?controls ?
  
  
{ ?
  
  
????import?events.TransInfoEvent; ?
  
  
???? ?
  
  
????import?flash.events.MouseEvent; ?
  
  
???? ?
  
  
????import?mx.events.FlexEvent; ?
  
  
????import?mx.managers.PopUpManager; ?
  
  
???? ?
  
  
????import?spark.components.Application; ?
  
  
????import?spark.components.Button; ?
  
  
????import?spark.components.TextInput; ?
  
  
???? ?
  
  
????public?class?RegistControl?extends?Application ?
  
  
????{ ?
  
  
????????public?var?username:TextInput; ?
  
  
????????public?var?pwd:TextInput; ?
  
  
???????? ?
  
  
????????public?var?submit1:Button; ?
  
  
????????public?var?submit2:Button; ?
  
  
???????? ?
  
  
????????public?var?parentView:Object; ?
  
  
????????public?var?callbackFunction:Function; ?
  
  
???????? ?
  
  
????????public?function?RegistControl() ?
  
  
????????{ ?
  
  
????????????super(); ?
  
  
????????????addEventListener(FlexEvent.CREATION_COMPLETE,creationCompleteHandler); ?
  
  
????????} ?
  
  
????????private?function?creationCompleteHandler(event:FlexEvent):void{ ?
  
  
????????submit1.addEventListener(MouseEvent.CLICK,submit1_clickHandler); ?
  
  
????????submit2.addEventListener(MouseEvent.CLICK,submit2_clickHandler); ?
  
  
????????} ?
  
  

????????private?function?submit1_clickHandler(event:MouseEvent):void{ ?

  
  
????????var?transEvent:TransInfoEvent=new?TransInfoEvent(TransInfoEvent.Tag,username.text,pwd.text); ?
  
  
????????dispatchEvent(transEvent); ?
  
  
????????PopUpManager.removePopUp(this); ?
  
  
????????} ?
  
  
????????private?function?submit2_clickHandler(event:MouseEvent):void{ ?
  
  
????????????callbackFunction(username.text,pwd.text); ?
  
  
????????????PopUpManager.removePopUp(this); ?
  
  
???????? ?
  
  
????????} ?
  
  
????} ?
  
  
}?
 
 

事件监听（绿的字体部分）：

 
 

package?controls ?
  
  
{ ?
  
  
????import?events.TransInfoEvent; ?
  
  
???? ?
  
  
????import?flash.events.MouseEvent; ?
  
  
???? ?
  
  
????import?mx.core.IFlexDisplayObject; ?
  
  
????import?mx.events.FlexEvent; ?
  
  
????import?mx.managers.PopUpManager; ?
  
  
???? ?
  
  
????import?spark.components.Application; ?
  
  
????import?spark.components.Button; ?
  
  
????import?spark.components.TextInput; ?
  
  
???? ?
  
  
????public?class?IndexControl?extends?Application ?
  
  
????{ ?
  
  
????????public?var?login:LoginControl; ?
  
  
????????public?var?regist:RegistControl; ?
  
  
???????? ?
  
  
????????public?var?loginbutton:Button; ?
  
  
????????public?var?registbutton:Button; ?
  
  
???????? ?
  
  
????????public?var?username:TextInput; ?
  
  
????????public?var?pwd:TextInput; ?
  
  
???????? ?
  
  
????????public?function?IndexControl() ?
  
  
????????{ ?
  
  
????????????super(); ?
  
  
????????????addEventListener(FlexEvent.CREATION_COMPLETE,creationCompleteHandler); ?
  
  
????????} ?
  
  
????????private?function?creationCompleteHandler(event:FlexEvent):void{ ?
  
  
????????????regist.addEventListener(TransInfoEvent.Tag,regist_transInfoHandler); ?
  
  
????????????registbutton.addEventListener(MouseEvent.CLICK,regist_clickHandler); ?
  
  
????????????loginbutton.addEventListener(MouseEvent.CLICK,login_clickHandler); ?
  
  
????????} ?
  
  

????????private?function?regist_transInfoHandler(event:TransInfoEvent):void{ ?

  
  
????????????username.text=event.username; ?
  
  

????????????pwd.text=event.pwd;????????? ?

  
  
????????} ?
  
  
????????private?function?regist_clickHandler(event:MouseEvent):void{ ?
  
  
????????????showCompnent(regist); ?
  
  

????????????regist.parentView?=?this; ?

  
  

????????????regist.callbackFunction?=?callbackFunctionHandler; ?

  
  
????????} ?
  
  
????????private?function?login_clickHandler(event:MouseEvent):void{ ?
  
  
????????????showCompnent(login); ?
  
  
????????} ?
  
  
????????private?function?showCompnent(obj:IFlexDisplayObject):void{ ?
  
  
???????????? ?
  
  
????????????PopUpManager.addPopUp(obj,this,true); ?
  
  
????????????PopUpManager.centerPopUp(obj); ?
  
  
????????} ?
  
  
????????private?function?callbackFunctionHandler(name:String,password:String):void{ ?
  
  

????????????username.text=name; ?

  
  

????????????pwd.text=password;?? ?

  
  
???????? ?
  
  
????????} ?
  
  
????} ?
  
  
}?
 
 

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