content/tourdeflex/spark/controls/ButtonBarExample.mxml

<?xml version="1.0" encoding="utf-8"?>
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  this work for additional information regarding copyright ownership.
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      http://www.apache.org/licenses/LICENSE-2.0

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  distributed under the License is distributed on an "AS IS" BASIS,
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<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">

	<fx:Style>
		@namespace "library://ns.adobe.com/flex/spark";
		
		ButtonBar ToggleButton:upAndSelected,
		ButtonBar ToggleButton:overAndSelected,
		ButtonBar ToggleButton:downAndSelected,
		ButtonBar ToggleButton:disabledAndSelected {
			baseColor: #FFFFFF;
			color: #323232;
		}
		ButtonBar {
			baseColor: #000000;
			color: #FFFFFF;
		}
	</fx:Style>
	
	<fx:Script>
		<![CDATA[
			import spark.events.IndexChangeEvent;
			
			/**
			 * Index change handler will be called each time a button is clicked
			 * and the event will provide information needed such as the previous
			 * index clicked.
			 **/
			protected function indexChangeHandler(event:IndexChangeEvent):void
			{
				myTextArea.text = "Button Bar index clicked = " + event.newIndex
				myTextArea.text = myTextArea.text + "\nButton Bar previous index = " + event.oldIndex;
				myTextArea.text = myTextArea.text + "\nButton Bar label clicked = " + myButtonBar.selectedItem;
				if (myButtonBar.selectedItem=="Red") {
					txtColor.setStyle("color","red");
					txtColor.text="Red selected!";
				}
				else if (myButtonBar.selectedItem=="Green") {
					txtColor.setStyle("color","green");
					txtColor.text="Green selected!";
				}
				else if (myButtonBar.selectedItem=="Blue") {
					txtColor.setStyle("color","blue");
					txtColor.text="Blue selected!";
				}
				else {
					txtColor.setStyle("color","yellow");
					txtColor.text="Yellow selected!";
				}
			}
			protected function resetButtonBar(event:MouseEvent):void
			{
				myButtonBar.selectedIndex = -1;
				myTextArea.text = "";
			}
		]]>
	</fx:Script>
	
	<s:Panel title="ButtonBar Sample" width="100%" height="100%">
		
		<s:layout>
			<s:VerticalLayout paddingLeft="10" paddingRight="10" paddingTop="10" paddingBottom="10"/>
		</s:layout>
			
			<s:HGroup width="100%" height="100%">
				<s:Label width="50%" verticalAlign="justify"
						 text="The ButtonBar component behaves like a series of toggle buttons, where one button remains selected
and only one button in the ButtonBar control can be in the selected state. That means when you select a button in a ButtonBar
control, the button stays in the selected state until you select a different button."/>	
				<s:VGroup left="10" top="5" color="0x000000" horizontalAlign="center">
					<s:ButtonBar id="myButtonBar" change="indexChangeHandler(event)"> 
						<mx:ArrayCollection> 
							<fx:String>Red</fx:String> 
							<fx:String>Green</fx:String> 
							<fx:String>Blue</fx:String> 
							<fx:String>Yellow</fx:String> 
						</mx:ArrayCollection> 
					</s:ButtonBar> 
					<s:TextArea id="myTextArea" width="{myButtonBar.width}" height="150"/>
					<s:Button id="myButton" label="Reset Selection" click="resetButtonBar(event)"/>	
					<s:Label id="txtColor" fontSize="16"/>	
				</s:VGroup>
			</s:HGroup>
	</s:Panel>
</s:Application>