Adding a listener to stage from within a class

programming flash
1

Hi guys,

I am trying to create a slider component class using AS 3.0. The slider works ok, but there is the onReleaseOutside problem. After googling, i came to the conclusion that one would add the MOUSE_UP event to the a eventlistener attached to the stage, and all would be fine.

However, the following code would give me a type error 1009 which complains about a null object.


public function Slider(t:MovieClip, m:MovieClip){
   track = t;
   marker = m;
   rectangle = new Rectangle(track.x, marker.y, track.width, 0); //Create the rectangle to bound the marker
   marker.addEventListener(MouseEvent.MOUSE_DOWN, startSliding);
   marker.buttonMode = true;
}
		
//Starts the sliding session
private function startSliding(event:MouseEvent):void
{	
   stage.addEventListener(MouseEvent.MOUSE_UP, stopSliding); //DOES NOT WORK
   event.target.addEventListener(MouseEvent.MOUSE_MOVE, updateOutput);
   event.target.startDrag(false, rectangle);
}
		
//Ends the sliding session
private function stopSliding(event:MouseEvent):void
{
   stage.removeEventListener(MouseEvent.MOUSE_UP, stopSliding); //SAME PROBLEM AS ABOVE
   event.target.stopDrag();
   event.target.removeEventListener(MouseEvent.MOUSE_MOVE, updateOutput);
}
		
private function updateOutput(event:MouseEvent):void
{
   //do stuff
}

I have tried

Stage(event.Target).addEventListener(MouseEvent.MOUSE_UP, stopSliding)

which doesnt work either.

Any ideas appreciated

Cheers :smiley: