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jtvalles

Inertial scroller - onComplete doesn't fire.

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I have some code that scrolls a movieClip. The problem is I cannot get the onComplete to fire and remove the listener. It will fire when the clip reaches its bounds but not any time in between.

 

Does my code prevent the tween from completing?

 


import com.greensock.*;
import flash.display.MovieClip;

var mc:Sprite = new Sprite();
mc.graphics.beginGradientFill(GradientType.LINEAR,
[0x666666,0xfff000],[0.9,0.1],[0,255],
new Matrix(0,-1,1,0,height,0));
mc.graphics.drawRect(225, 50, 100, 300)
addChild(mc);
var destination:Point=new Point();
var dragging:Boolean=false;
var speed:Number=20;
var offset:Point=new Point();
var topLimit:Number = 0 - ( mc.height - (stage.height-50) );
var bottomLimit:Number = 120;

mc.addEventListener(MouseEvent.MOUSE_DOWN,startdrag, false, 0, true);
stage.addEventListener(MouseEvent.MOUSE_UP,stopdrag, false, 0, true);

function startdrag(e:MouseEvent):void{

  offset.y=mc.mouseY*mc.scaleY;
  dragging=true;
  mc.addEventListener(Event.ENTER_FRAME,followmouse, false, 0, true);

}

function stopdrag(e:MouseEvent):void{
  dragging=false;
}

function followmouse(e:Event):void{

  if(dragging){
  destination.y=mouseY;
  }

  TweenLite.to(mc, 2, {y:mc.y-=(mc.y-(destination.y-offset.y))/speed, onComplete:removeEFListener});

  if(mc.y > bottomLimit){
  mc.removeEventListener(Event.ENTER_FRAME,followmouse);
TweenLite.to(mc, .6, {y:bottomLimit});
trace('removedBottom');
  }
  if(mc.y<topLimit){
 TweenLite.to(mc, .6, {y:topLimit});
mc.removeEventListener(Event.ENTER_FRAME,followmouse);
trace('removedTop');
  }

}

function removeEFListener():void{
mc.removeEventListener(Event.ENTER_FRAME,followmouse);
trace('removedEL');
}

 

Note: This code is repurposed. I lost the source for the original code and gladly give credit where its due - so if its yours, thanks and good job.

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from your code it appears that as soon as your drag beyond bottomLimit or topLimit you are creating new tweens that don't have an onComplete and most likely they are overwriting the tween that did have the onComplete.

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Carl is right, and you are CONSTANTLY overwriting your tween on every frame, so there's never a chance for the tween to complete.

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