Flex：失去組件焦點

Question

我有一個（希望）快速的問題。我有一些步進盒。儘管這可能適用於任何交互式組件。當我點擊其他任何地方（包含舞臺）時，我希望所選框失去焦點。是否有捷徑可尋？我似乎無法找到一種有效的方式使它失去焦點。

Answer 1

如果任何人在這裏找到自己的方式尋求解決這個問題，這裏就是答案：

private function onGlobalMouseUp(event : MouseEvent) : void { 
     var fm:FocusManager = new FocusManager(stage); 

     //Since Flash Player can set focus on subcomponents as well as on components themselves, 
     //findFocusManagerComponent is used to find the component that either has focus or contains the subcomponent 
     //that has focus. If, for example, a TextField contained within a TextArea component has focus, findFocusManagerComponent 
     //will return the TextArea component, and not the TextField. This being the case, we can definitely determine 
     //whether the target object of the MouseUp event is a component (or is part of a component). If the target 
     //object is NOT a component (nor contained within one), then we clear all component focus. 

     if(fm.findFocusManagerComponent(event.target as InteractiveObject) is UIComponent){ 
      //target of MouseUp is either a UIComponent, or is contained within a UIComponent, so do nothing. 
     }else{ 
      //target of MouseUp is neither a UIComponent, nor is it contained within a UIComponent, so set component focus to null. 
      fm.setFocus(null); 
     } 
    } 

Answer 2

也許你應該檢查出FocusManager.hideFocus()。

也許將它綁定到您的UIComponent的focusOut事件。

Flex API

Answer 3

所以這裏的解決方案，我想出來的，工作得非常好。我有一個名爲add()的功能，它已被分配到applicationComplete。在該功能我包括：

this.skin.addEventListener(MouseEvent.MOUSE_UP, loseFocus); 

的呼叫：

private function loseFocus(e : MouseEvent) : void 
{ 
    if (e.eventPhase == EventPhase.AT_TARGET) 
    { 
     this.focusManager.deactivate(); 
    } 
} 

夠簡單了，而且做什麼，我一直在尋找。 「階段」過濾器是必要的，以防止其他組件註冊點擊。

重要提示：this.skin需要成爲事件目標。舞臺不會在Flex應用程序中暴露於鼠標。

Example Application Code

如果有人有更好的解決方案，請建議之一！