通過使用事件監聽器的默認按鈕切換器

Question

我試圖使點擊文本輸入默認的最近按鈕。爲此，我寫了下面的代碼。

首先，爲什麼我的buttonSwitcher函數跟在MouseEvent.CLICK後面？其次，有沒有更好的方法來做到這一點？

在此先感謝

<?xml version="1.0" encoding="utf-8"?> 
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="addListeners()"> 
    <mx:Script> 
     <![CDATA[ 

      public function addListeners():void { 
       a.addEventListener(MouseEvent.CLICK, buttonSwitcher); 
       b.addEventListener(MouseEvent.CLICK, buttonSwitcher); 
      } 

      public function buttonSwitcher(event:MouseEvent):void { 

       form.defaultButton = (((event.currentTarget as TextInput).id == "a") ? aButton : bButton); 

      } 
     ]]> 
    </mx:Script> 

    <mx:Panel> 
     <mx:Form id="form"> 
      <mx:FormItem label="a" direction="horizontal"> 
       <mx:TextInput id="a" /> 
       <mx:Button id="aButton" label="aButton" /> 
      </mx:FormItem> 
      <mx:FormItem label="b" direction="horizontal"> 
       <mx:TextInput id="b" /> 
       <mx:Button id="bButton" label="bButton" /> 
      </mx:FormItem> 
     </mx:Form> 
    </mx:Panel> 
</mx:Application> 

Answer 1

使用更改按鈕，也許使用FocusEvent，而不是點擊，那麼你也切換按鈕事件的HT ecapture階段時使用「標籤」，通過inputfields：

private function addListeners():void 
{ 
    a.addEventListener(FocusEvent.FOCUS_IN, buttonSwitcher, true); 
    b.addEventListener(FocusEvent.FOCUS_IN, buttonSwitcher, true); 
} 

public function buttonSwitcher(event:FocusEvent):void 
{ 
    form.defaultButton = (((event.currentTarget as TextInput).id == "a") ? aButton : bButton); 
}