src/nu/xero/flex/FlexFPS.as

package nu.xero.flex
{
	import flash.display.*;
	import flash.events.*;
	import flash.system.System;
	import flash.text.*;
	import flash.utils.getTimer;
	
	import mx.core.UIComponent;

	public class FlexFPS extends UIComponent
	{
		private var theBar			:Sprite = new Sprite();
		private var theBG			:Sprite = new Sprite();
		private var label			:TextField = new TextField();
		private var time			:Number;
		private var frameTime		:Number;
		private var prevFrameTime	:Number = getTimer();
		private var secondTime		:Number;
		private var prevSecondTime	:Number = getTimer();
		private var frames			:Number = 0;
		private var theFPS			:String = "...";
		private var other			:String = "";
		private var memory			:String;
		private var which			:String;
		
		public function FlexFPS(barcolor:uint = 0x333333, bgcolor:uint = 0x000000, textcolor:uint = 0xFFFFFF, bgalpha:Number = 1, memorydisplay:String = "kb"){
			theBG.graphics.beginFill(bgcolor, 1);
			theBG.graphics.drawRect(0, 0, this.maxWidth, 10);
			theBG.graphics.endFill();
			theBG.alpha = bgalpha;
			this.addChild(theBG);

			theBar.graphics.beginFill(barcolor, 1);
			theBar.graphics.drawRect(0, 0, 25, 10);
			theBar.graphics.endFill();
			this.addChild(theBar);
			
			label.autoSize=TextFieldAutoSize.LEFT;
			label.htmlText = "<font face=\"verdana\" size=\"5\"></font>";		
			label.textColor=textcolor;
			label.selectable=false;
			this.addChild(label);
			
			this.scaleX = 2;
			this.scaleY = 2;
			
			which = memorydisplay;
			
			this.addEventListener(Event.ENTER_FRAME, onEnterFrame);	
		}
		public function onEnterFrame(e:Event):void
		{
			time = getTimer();
			
			frameTime = time - prevFrameTime;
			secondTime = time - prevSecondTime;
			
			if(secondTime >= 1000){
				theFPS = frames.toString();
				frames = 0;
				prevSecondTime = time;
			} else {
				frames++;
			}
			prevFrameTime = time;

			if(which=="b"){
				memory = flash.system.System.totalMemory.toPrecision(8) + " bytes";
			} else if(which=="kb"){
				memory = (flash.system.System.totalMemory / 1000).toPrecision(8) + " kbs";
			} else if (which=="mb"){
				memory = (flash.system.System.totalMemory / 1000000).toPrecision(8) + " mbs";
			}
				
			label.htmlText = "<font face=\"verdana\" size=\"5\"> &lt; framerate: "+ theFPS +" fps / "+ frameTime +"ms . memory: "+ memory +" . "+ other.toString() +" &gt;</font>";
			theBar.scaleX = theBar.scaleX - ((theBar.scaleX - (frameTime/10)) / 5);
		}
		public function update(x:String):void
		{
			other = x;
		}
	}
}