package com.spikything.utils 
{
	import flash.display.Stage;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.external.ExternalInterface;
	
	/**
	 * MouseWheelTrap - Simultaneous browser/Flash mousewheel scroll issue work-around
	 * @version 0.1
	 * @author Liam O'Donnell
	 * @usage Simply call the static method MouseWheelTrap.setup(stage)
	 * @see http://www.spikything.com/blog/?s=mousewheeltrap for updates
	 * This software is released under the MIT License <http://www.opensource.org/licenses/mit-license.php>
	 * (c) 2009 spikything.com
	 */
	public class MouseWheelTrap {static private var _mouseWheelTrapped :Boolean;public static function setup(stage:Stage):void {stage.addEventListener(MouseEvent.MOUSE_MOVE, function():void { allowBrowserScroll(false); } );stage.addEventListener(Event.MOUSE_LEAVE, function():void { allowBrowserScroll(true); } );}private static function allowBrowserScroll(allow:Boolean):void{createMouseWheelTrap();if (ExternalInterface.available) {ExternalInterface.call("allowBrowserScroll", allow);}}private static function createMouseWheelTrap():void{if (_mouseWheelTrapped) {return;} _mouseWheelTrapped = true; if (ExternalInterface.available) {ExternalInterface.call("eval", "var browserScrolling;function allowBrowserScroll(value){browserScrolling=value;}function handle(delta){if(!browserScrolling){return false;}return true;}function wheel(event){var delta=0;if(!event){event=window.event;}if(event.wheelDelta){delta=event.wheelDelta/120;if(window.opera){delta=-delta;}}else if(event.detail){delta=-event.detail/3;}if(delta){handle(delta);}if(!browserScrolling){if(event.preventDefault){event.preventDefault();}event.returnValue=false;}}if(window.addEventListener){window.addEventListener('DOMMouseScroll',wheel,false);}window.onmousewheel=document.onmousewheel=wheel;allowBrowserScroll(true);");}}}

}