设置NumericStepper控件获得焦点时的边框粗细.

NumericStepper控件的focusThickness 样式学习.
示例：

代码：

<? xml version="1.0" encoding="utf-8" ?>
<!--  http://blog.flexexamples.com/2008/05/24/setting-the-focus-thickness-on-a-numericstepper-control-in-flex/  -->
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"
        layout ="vertical"
        verticalAlign ="middle"
        backgroundColor ="white"  viewSourceURL ="srcview/index.html" >

     < mx:Script >
         <![CDATA[
            import mx.events.NumericStepperEvent;

            private function numericStepper_change(evt:NumericStepperEvent):void {
                // reset focus rect
                focusManager.setFocus(btn);
                focusManager.setFocus(numericStepper);
            }
         ]]>
     </ mx:Script >

     < mx:ApplicationControlBar  dock ="true" >
         < mx:Button  id ="btn"
                label ="click here to remove focus"   />
     </ mx:ApplicationControlBar >

     < mx:Form >
         < mx:FormItem  label ="focusThickness:" >
             < mx:NumericStepper  id ="numericStepper"
                    minimum ="0"
                    maximum ="10"
                    focusThickness =" {numericStepper.value} "
                    change ="numericStepper_change(event);"   />
         </ mx:FormItem >
     </ mx:Form >

</ mx:Application >

也可以通过CSS样式表设置

<? xml version="1.0" encoding="utf-8" ?>
<!--  http://blog.flexexamples.com/2008/05/24/setting-the-focus-thickness-on-a-numericstepper-control-in-flex/  -->
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"
        layout ="vertical"
        verticalAlign ="middle"
        backgroundColor ="white" >

     < mx:Style >
        NumericStepper {
            focusThickness: 10;
        }
     </ mx:Style >

     < mx:ApplicationControlBar  dock ="true" >
         < mx:Button  id ="btn"
                label ="click here to remove focus"   />
     </ mx:ApplicationControlBar >

     < mx:Form >
         < mx:FormItem  label ="focusThickness:" >
             < mx:NumericStepper  id ="numericStepper"
                    minimum ="0"
                    maximum ="10"   />
         </ mx:FormItem >
     </ mx:Form >

</ mx:Application >

也可以通过as来设置：

<? xml version="1.0" encoding="utf-8" ?>
<!--  http://blog.flexexamples.com/2008/05/24/setting-the-focus-thickness-on-a-numericstepper-control-in-flex/  -->
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"
        layout ="vertical"
        verticalAlign ="middle"
        backgroundColor ="white" >

     < mx:Script >
         <![CDATA[
            import mx.events.NumericStepperEvent;

            private function numericStepper_change(evt:NumericStepperEvent):void {
                numericStepper.setStyle("focusThickness", evt.value);
                // reset focus rect
                focusManager.setFocus(btn);
                focusManager.setFocus(numericStepper);
            }
         ]]>
     </ mx:Script >

     < mx:ApplicationControlBar  dock ="true" >
         < mx:Button  id ="btn"
                label ="click here to remove focus"   />
     </ mx:ApplicationControlBar >

     < mx:Form >
         < mx:FormItem  label ="focusThickness:" >
             < mx:NumericStepper  id ="numericStepper"
                    minimum ="0"
                    maximum ="10"
                    change ="numericStepper_change(event);"   />
         </ mx:FormItem >
     </ mx:Form >

</ mx:Application >