//-----------------------------------------------------------------------------------
 
/*
	Copyleft (¢) 2009  Vincent Maitray - www.electrofrog.com
 
	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:
 
	The above copyright notice and this permission notice shall be included in
	all copies or substantial portions of the Software.
 
	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	THE SOFTWARE.
 
	Mention to the author would be appreciated !
*/
 
//-----------------------------------------------------------------------------------
 
package com.electrofrog.utils
{
	import com.electrofrog.events.StageResizeManagerEvent;
 
	import flash.display.Stage;
	import flash.events.Event;
	import flash.events.EventDispatcher;
	import flash.events.TimerEvent;
	import flash.ui.Mouse;
	import flash.utils.Timer;
 
	/**
	 * Handle the resize process of the stage more accuratly than the simple Event.resize event.
	 *
	 * @param pStage The stage instance to be listen to.
	 * @param pResizeEndDelay The delay in ms after which the ResizeManagerEvent.STAGE_RESIZE_END event is dispatched.
	 *
	 * @author Vincent Maitray
	 * @date April 03, 2009.
	 */
	public class StageResizeManager extends EventDispatcher
	{
 
		private static var _instance:StageResizeManager;
		private var _stage:Stage;
		private var _t1:Timer;
		private var _resizeEndDelay:int;
 
		/**
		 * Method for instanciating this class as a Singleton
		 */
		public static function getinstance( pStage:Stage, pResizeEndDelay:int = 250 ):StageResizeManager
		{	
 
			if ( !_instance )
				_instance = new StageResizeManager( new SingletonEnforcer(), pStage, pResizeEndDelay );
			return _instance;
 
		}
 
		/**
		 * hidden constructor.
		 * @private
		 */
		public function StageResizeManager( se:SingletonEnforcer, pStage:Stage, pResizeEndDelay:int )
		{
 
			if ( !se )
				throw( new Error( "operator 'new' is not not allowed with singleton classes. Use ResizeManager.getInstance() instead !" ) );
 
			_stage = pStage;
			_resizeEndDelay = pResizeEndDelay;
 
			_stage.addEventListener( Event.RESIZE, onStageResize );
 
			_t1 = new Timer( 50, 0 );
			_t1.addEventListener( TimerEvent.TIMER, onTimer );
 
		}
 
		/**
		 * Fired when the user resizes the stage
		 *
		 * @param e Event
		 */
		private function onStageResize( e:Event ):void
		{
 
			if( !_t1.running )
			{
 
				dispatchEvent( new StageResizeManagerEvent( StageResizeManagerEvent.STAGE_RESIZE_START, false, false ) );
				_t1.start();
 
			}
			else
			{
 
				dispatchEvent( new StageResizeManagerEvent( StageResizeManagerEvent.STAGE_RESIZE_PROGRESS, false, false ) );
				_t1.reset();
				_t1.start();
 
			}
 
		}
 
		/**
		 * Fired each pResizeEndDelay ms ( eg 250 ) when the timer is running.
		 *
		 * @param e Event
		 */
		private function onTimer( e:TimerEvent ):void
		{
 
			var t:Timer = e.currentTarget as Timer
			var count:int = t.currentCount * t.delay;
 
			if( count > _resizeEndDelay )
			{
 
				_t1.reset();
				dispatchEvent( new StageResizeManagerEvent( StageResizeManagerEvent.STAGE_RESIZE_END, false, false ) );
 
			}
 
		}
 
	}
 
}
 
/**
 * Dummy class, part of the Singleton subsystem
 */
class SingletonEnforcer
{
}