Small Timer Application

gistfile1.as

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
					   xmlns:s="library://ns.adobe.com/flex/spark" 
					   xmlns:mx="library://ns.adobe.com/flex/mx"
					   creationComplete="windowedapplication1_creationCompleteHandler(event)"
					   >
	<fx:Script>
		<![CDATA[
			import mx.events.FlexEvent;
			
			private var startDate:Date;
			private var timer:Timer;
			
			private var TIMER_MIN:int = 25;
			
			protected function windowedapplication1_creationCompleteHandler(event:FlexEvent):void
			{
				timer = new Timer(1000);
				timer.addEventListener(TimerEvent.TIMER, timerHandler);
			}
			
			protected function button1_clickHandler(event:MouseEvent):void
			{
				startDate = new Date();
				
				if( timer.running == false)
					timer.start();
			}
			
			protected function timerHandler(event:TimerEvent):void
			{
				var targetDate:Date = new Date();
				var currentDate:Date = new Date();
				
				targetDate.time = startDate.time + (1000 * 60 * TIMER_MIN); 
				
				var interval:int =  Math.abs( Math.round( (targetDate.time - currentDate.time) / 1000) );
				
				var s:int = interval % 60;
				var m:int = (interval / 60) % 60;
				var h:int = (interval / 3600) % 24;
				
				myLabel.text = h + ":" + m + ":" + s;
				
				if( interval == 0)
					timer.stop();
			}
		]]>
	</fx:Script>
	
	
	<s:VGroup verticalCenter="0" horizontalCenter="0" horizontalAlign="center">
		<s:Label id="myLabel" text="0:0:0" fontSize="60"/>
		<s:Button label="Start" click="button1_clickHandler(event)"/>
	</s:VGroup>
	
</s:WindowedApplication>