<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/01/04/using-a-timer-to-change-the-selected-index-of-a-viewstack-container-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
		layout="vertical"
		verticalAlign="middle"
		backgroundColor="white"
		creationComplete="init();" viewSourceURL="srcview/index.html">

	<mx:Script>
		<![CDATA[
			private var timer:Timer;

			private function init():void {
				timer = new Timer(1000); /* 1000ms == 1second */
				timer.addEventListener(TimerEvent.TIMER, onTimer);
			}

			private function onTimer(evt:TimerEvent):void {
				var idx:uint = viewStack.selectedIndex;
				var max:uint = viewStack.numChildren;

				var newIdx:uint = ++idx % max;
				viewStack.selectedIndex = newIdx;
			}

			private function startTimer():void {
				if (!timer.running) {
					timer.start();
				}
			}

			private function stopTimer():void {
				if (timer.running) {
					timer.stop();
				}
			}
		]]>
	</mx:Script>

	<mx:ApplicationControlBar dock="true">
		<mx:Button label="Start timer" click="startTimer();" />
		<mx:Button label="Stop timer" click="stopTimer();" />

		<mx:Spacer width="100%" />

		<mx:Label text="selectedIndex:" />
		<mx:HSlider id="slider"
				minimum="0"
				maximum="3"
				liveDragging="true"
				snapInterval="1"
				tickInterval="1"
				change="viewStack.selectedIndex = event.value;" /> 		
	</mx:ApplicationControlBar>

	<mx:ViewStack id="viewStack" width="100%" height="100%">
		<mx:VBox backgroundColor="haloBlue"
				width="100%"
				height="100%">
			<mx:Label text="VBox 1" />
		</mx:VBox>
		<mx:VBox backgroundColor="haloGreen"
				width="100%"
				height="100%">
			<mx:Label text="VBox 2" />
		</mx:VBox>
		<mx:VBox backgroundColor="haloOrange"
				width="100%"
				height="100%">
			<mx:Label text="VBox 3" />
		</mx:VBox>
		<mx:VBox backgroundColor="haloSilver"
				width="100%"
				height="100%">
			<mx:Label text="VBox 4" />
		</mx:VBox>
	</mx:ViewStack>

</mx:Application>