RadioButtonとRadioButtonGroup

ラジオボタンの感覚からはRadioButtonGroupが便利。

RadioButton
ボタン1つ1つにイベントハンドラーが必要になるが、細かい動きが出来る。

    <mx:Script>
        <![CDATA[    

            import flash.events.Event;

            private function handleAmEx(event:Event):void {
                ...
            }

            private function handleMC(event:Event):void {
                ...
            }

            private function handleVisa(event:Event):void {
                ...
            }
        ]]>
    </mx:Script>

    <mx:RadioButton groupName="cardtype" id="americanExpress"
        label="American Express" width="150" click="handleAmEx(event);"/>
    <mx:RadioButton groupName="cardtype" id="masterCard"
        label="MasterCard" width="150" click="handleMC(event);"/>
    <mx:RadioButton groupName="cardtype" id="visa"
        label="Visa" width="150" click="handleVisa(event);"/>
http://livedocs.adobe.com/flex/2_jp/docs/wwhelp/wwhimpl/common/html/wwhelp.htm?context=LiveDocs_Parts&file=00000538.html

RadioButtonGroup
mx:RadioButtonGroupのidからボタンの値が受け取れる。
ex:)RadioButtonGroupNAME.selectedValue.toString()

<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
    <mx:Script>
        <![CDATA[    

            import mx.controls.Alert;
            import mx.events.ItemClickEvent;
    
            private function handleCard(evtObj:ItemClickEvent):void {
                if (evtObj.currentTarget.selectedValue == "AmEx") {
                    Alert.show("You selected American Express") 
                } 
                else {
                    if (evtObj.currentTarget.selectedValue == "MC") {
                        Alert.show("You selected Master Card") 
                    } 
                    else {
                        Alert.show("You selected Visa") 
                    }
                } 
            }
        ]]>
    </mx:Script>
    <mx:RadioButtonGroup id="cardtype" itemClick="handleCard(event)"/>
    <mx:RadioButton groupName="cardtype" id="americanExpress" value="AmEx" 
        label="American Express" width="150"/>
    <mx:RadioButton groupName="cardtype" id="masterCard" value="MC" 
        label="MasterCard" width="150"/>
    <mx:RadioButton groupName="cardtype" id="visa" value="Visa" 
        label="Visa" width="150"/>
</mx:Application>
http://livedocs.adobe.com/flex/2_jp/docs/wwhelp/wwhimpl/common/html/wwhelp.htm?context=LiveDocs_Parts&file=00000538.html