[Flex] PopUpButton系列 —— 控制弹出菜单的透明度、可用、可选择状态

<?xml version="1.0" encoding="utf-8"?>
<!--控制弹出菜单的透明度、可用、可选择状态 PopUpButtonPopUpTranslucent.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
               xmlns:s="library://ns.adobe.com/flex/spark" 
               xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
    <fx:Script>
        <![CDATA[
            import mx.controls.Menu;
            import mx.events.FlexEvent;
            private var menu:Menu;
            protected function popUpButton_initializeHandler(event:FlexEvent):void
            {
                
            }
            
            protected function popUpButton_creationCompleteHandler(event:FlexEvent):void
            {
                menu = new Menu();
                menu.labelField = "@label";
                menu.dataProvider = xmlList;
                popUpButton.popUp = menu;
                menu.width = popUpButton.width;
            }
            
        ]]>
    </fx:Script>
    <fx:Declarations>
        <!-- 将非可视元素（例如服务、值对象）放在此处 -->
        <fx:Array id="arr">
            <fx:Object label="《霹雳先锋》香港票房8916612" actor="Steven Chow"/>
            <fx:Object label="《捕风汉子》香港票房3149395" actor="Steven Chow"/>
            <fx:Object label="《小偷阿星》香港票房7968106 " actor="Steven Chow"/>
            <fx:Object type="separator"/>
            <fx:Object label="笑傲江湖之东方不败（1992）" type="check" actor="Jet Li"/>
            <fx:Object label="精武英雄（1994）" type="radio" actor="Jet Li"/>
            <fx:Object label="给爸爸的信（1995）" actor="Jet Li"/>
        </fx:Array>
        <fx:XMLList xmlns="" id="xmlList">
            <node label="《霹雳先锋》香港票房8916612" type="radio" toggled="true" />
            <node label="《捕风汉子》香港票房3149395">
                <node label="child item" />
            </node>
            <node label="《小偷阿星》香港票房7968106" />
            <node type="separator" />
            <node label="笑傲江湖之东方不败（1992）" type="check" toggled="true" />
            <node label="精武英雄（1994）" />
            <node label="给爸爸的信（1995）" enabled="false" />
        </fx:XMLList>
    </fx:Declarations>
    <fx:Style>
        @namespace s "library://ns.adobe.com/flex/spark";
        @namespace mx "library://ns.adobe.com/flex/mx";
        mx|PopUpButton {
            popUpStyleName: myCustomPopUpStyleName; 
        }
        /* mx|Menu{
            fontWeight: normal;
            textAlign: left;
            chromeColor: blue;
            contentBackgroundAlpha:0.4;
            contentBackgroundColor:white;
            borderStyle: solid;
        } */ 
        .myCustomPopUpStyleName {
            fontWeight: normal;
            textAlign: center;
            contentBackgroundAlpha:0.4;
            contentBackgroundColor:white;
            borderStyle: solid;
            
        }

    </fx:Style>
    <s:controlBarContent>
        <mx:PopUpButton id="popUpButton" label="Please select an item..." openAlways="true" initialize="popUpButton_initializeHandler(event)" creationComplete="popUpButton_creationCompleteHandler(event)" />
    </s:controlBarContent>
    <s:BorderContainer backgroundAlpha="0.5" backgroundColor="haloSilver" width="100%" height="100%" />
</s:Application>