/**
 *  VIDEO SCRUBBER
 * ----------------
 * 
 *  @usage Lets the user grab, scrub, throw a loaded flv
 * 
 *  @author  Rackdoll ( http://blog.rackdoll.nl )
 *  @version VideoScrubber 1.0 Release.
 * 
 *  @author  Vladimir ( http://despark.com )
 *  @version VideoScrubber 2.0 Revisited, VideoAdapter 1.0 Release
 * 
 * 
 */
package {
	
	import flash.display.MovieClip;
	import flash.display.Stage;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.utils.getTimer;
	
	public class VideoScrubber {
		
		private var stage:Stage;
		private var clip:MovieClip;
		
		private var startPos:Number;
		private var endPos:Number;
		private var startTime:Number;
		private var endTime:Number;
		private var timeUnit:Number;
		private var speedUnit:Number;
		private var currFrame:Number;
		private var obj:Object = new Object();
		
		public function VideoScrubber( $stage:Stage, $clip:MovieClip ) {
			stage = $stage;
			clip = $clip;
			startTime = 0;
			endTime   = 0;
			startPos = endPos = currFrame =  0;
			obj.currFrame = 0;
			build();
		}
		
		private function build():void {
			stage.addChild( clip );
			trace( stage, clip, clip.parent );
			clip.gotoAndStop(1);
			clip.buttonMode = true;
			stage.addEventListener( MouseEvent.MOUSE_DOWN, onDown);
			stage.addEventListener( MouseEvent.MOUSE_UP, onUp );
		}
		
		
		
		
		private function onDown( evt:MouseEvent ):void {
			stage.removeEventListener( Event.ENTER_FRAME, tweenToFrame );
			oriX =  stage.mouseX;
			
			aDelta = [];
			
			startPos  = stage.mouseX - endPos;
			startTime = getTimer();
			currX     = stage.mouseX;
			stage.addEventListener( Event.ENTER_FRAME, onDrag );
			onDrag();
			
		}
		private var precision:int = 5;
		private var currX:Number = 0;
		private var prevX:Number = 0;
		private var deltaX:Number = 0;
		private var aDelta:Array  = new Array();
		private var time:Number = 0;
		private var oriX:Number = 0;
		private function onDrag(e:Event = null ):void {
			time++;
			prevX = currX;
			currX = stage.mouseX;
			//deltaX = currX - prevX;
			
			var currDeltaX:Number = currX - prevX;
			aDelta.push( currDeltaX );
			if( aDelta.length >= precision ) aDelta.shift();
			calcDelta();
			
			
			gotoFrame( Math.round( clip.currentFrame + deltaX ) );
			
		}
		
		
		
		private function calcDelta():void {
			deltaX = 0;
			for (var i:int = 0; i < aDelta.length; i++) {
				deltaX += aDelta[i];
			}
			
			deltaX /= aDelta.length
		}
		
		private function gotoFrame( $frame:int ):void {
			var frame:int = $frame;
			if ( frame < 0 ) frame = clip.totalFrames + frame;
			if ( frame > clip.totalFrames ) frame = frame - clip.totalFrames;
			clip.gotoAndStop( frame );
			
			trace(frame);
		}
		
		
		private function onUp( Evt:MouseEvent ):void {
			stage.removeEventListener( Event.ENTER_FRAME, onDrag );
			prevX  = currX;
			currX  = stage.mouseX;
			deltaX = currX - prevX;
			
			if ( deltaX  == 0  && stage.mouseX == oriX  ) {
				deltaX =  -(((clip.width >> 1) - clip.mouseX ) / 10);
				if ( deltaX < 0 ) deltaX = -6;
				else if ( deltaX > 0  ) deltaX = 6;
			}
			
			
			
			
			if ( deltaX  == 0  && stage.mouseX != oriX  ) return;
			
			
			//trace(deltaX );
			tweenToFrame();
			
			stage.addEventListener( Event.ENTER_FRAME, tweenToFrame );
		}
		
		
		private function tweenToFrame( e:Event = null ):void {
			
			gotoFrame( Math.round( clip.currentFrame + deltaX ) );
			deltaX *= .95;
		
			if ( deltaX > -1 && deltaX < 1  )
				stage.removeEventListener( Event.ENTER_FRAME, tweenToFrame );
		}
		
		
		
	}
	
}