改变HSlider上标记的宽度.

tickThickness属性。
示例：

代码：

 

<? xml version="1.0" encoding="utf-8" ?>
<!--  http://blog.flexexamples.com/2008/05/06/setting-the-tick-thickness-on-a-slider-control-in-flex/  -->
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"
        layout ="vertical"
        verticalAlign ="middle"
        backgroundColor ="white" >

     < mx:Form >
         < mx:FormItem  label ="tickThickness:" >
             < mx:HSlider  id ="slider"
                    minimum ="1"
                    maximum ="4"
                    liveDragging ="true"
                    snapInterval ="1"
                    tickInterval ="1"
                    tickThickness =" {slider.value} "    />
         </ mx:FormItem >
     </ mx:Form >

</ mx:Application >

http://blog.flexexamples.com/2008/05/06/setting-the-tick-thickness-on-a-slider-control-in-flex/