定义ComboBox(下拉列表)组件垂直滚动条的样式。

dropdownStyleName样式和verticalScrollBarStyleName样式.的学习

示例： 代码：

<?xmlversion="1.0"encoding="utf-8"?>

<!--//12/29/styling-a-flex-3-combobox-controls-vertical-scroll-bars/-->

<mx:Applicationxmlns:mx="//mxml"

layout="vertical"

verticalAlign="top"

backgroundColor="white">

<mx:Style>

.myCustomComboBox{

dropdownStyleName:myCustomDropdown;

}

.myCustomDropdown{

fontWeight:normal;

verticalScrollBarStyleName:myCustomVertScroll;

}

.myCustomVertScroll{

trackColors:white,white;

upArrowSkin:Embed("bullet_delete.png");

downArrowSkin:Embed("bullet_add.png");

}

</mx:Style>

<mx:Arrayid="arr">

<mx:Objectlabel="One"/>

<mx:Objectlabel="Two"/>

<mx:Objectlabel="Three"/>

<mx:Objectlabel="Four"/>

<mx:Objectlabel="Five"/>

<mx:Objectlabel="Six"/>

<mx:Objectlabel="Seven"/>

</mx:Array>

<mx:Form>

<mx:FormItemlabel="default:">

<mx:ComboBoxid="comboBox1"

dataProvider="{arr}"/>

</mx:FormItem>

<mx:FormItemlabel="skinned:">

<mx:ComboBoxid="comboBox2"

dataProvider="{arr}"

styleName="myCustomComboBox"/>

</mx:FormItem>

</mx:Form>

</mx:Application>