fps

package com.ultizen.hmlt.utils
{
	import com.ultizen.hmltMiniGame.crystal.greensock.plugins.VolumePlugin;
	
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.text.TextField;
	import flash.text.TextFormat;
	import flash.utils.Timer;
	import flash.utils.getTimer;

/**
 * 
 * @author jiading
 * 
 */
public class FPS extends Sprite
{
	//--------------------------------------------------------------------------
	//		Static
	//--------------------------------------------------------------------------
	
	//--------------------------------------------------------------------------
	//		Constructor
	//--------------------------------------------------------------------------
	public function FPS()
	{
		addEventListener(Event.ADDED_TO_STAGE,addToStagaHandler);	
	}
	//--------------------------------------------------------------------------
	//		Variables
	//--------------------------------------------------------------------------
	private var text : TextField;
	//--------------------------------------------------------------------------
	//		Properties
	//--------------------------------------------------------------------------
	private var crtTime : uint;
	private var prevTime : uint;
	private var fps : uint;
	private var isWorking : Boolean;
	private var str : String;
	//--------------------------------------------------------------------------
	//		Public Methods
	//--------------------------------------------------------------------------
	
	//--------------------------------------------------------------------------
	//		Event Handler
	//--------------------------------------------------------------------------
	private function addToStagaHandler(event : Event):void
	{
		removeEventListener(Event.ADDED_TO_STAGE,addToStagaHandler);
		isWorking = false;
		initBg();
		initText();
		this.buttonMode = true;
		this.addEventListener(MouseEvent.MOUSE_DOWN,mouseDownHandler);
	}
	
	private function mouseDownHandler(event : MouseEvent):void
	{
		if(!isWorking)
		{
			isWorking = true;
			startWork();
		}
		else
		{
			isWorking = false;
			stopWork();
		}
	}
	
	private function efHandler(event : Event):void
	{
		crtTime = getTimer();
		
		if(crtTime - 1000 > prevTime)
		{
			prevTime = crtTime;
			text.text = "FPS: "+ fps.toString();
			fps = 0;
		}
		fps++;
		
	}
	//--------------------------------------------------------------------------
	//		Protected
	//--------------------------------------------------------------------------
	
	//--------------------------------------------------------------------------
	//		Privates
	//--------------------------------------------------------------------------
	private function initBg():void
	{
		this.graphics.beginFill(0x000000);
		this.graphics.drawRect(0,0,50,20);
		this.graphics.endFill();
	}
	
	private function initText():void
	{
		text = new TextField();
		text.width = 70;
		text.height = 20;
		text.selectable = false;
		text.mouseEnabled = false;
		text.textColor = 0xff0000;
		text.text = "show fps";
		addChild(text);
	}
	
	private function startWork():void
	{
		addEventListener(Event.ENTER_FRAME,efHandler);
	}
	
	private function stopWork():void
	{
		removeEventListener(Event.ENTER_FRAME,efHandler);
		text.text = "show fps";
	}
	//--------------------------------------------------------------------------
	//		Dispose
	//--------------------------------------------------------------------------
}
	
}