Catching scroller position works, but how to get parent components from scroller?

Thanks to another post here I managed to add an event listener to the scroller of a container. Now I want to hide another container when the scroller reaches a certain position.

Getting the position is working but as methods like .getParent() don't work on the scroller iself I can't figure out how to call other components (without using unique IDs).

Code:

var scroller = this.down('[itemId=channelCarousel]').getScrollable().getScroller();    
scroller.on({    
    scroll : function() {    
        if (scroller.position.x > 500) {
            //do something    
        }    
        else {        
            //do something else
        }   
    }
});

How to find the container that is holding the scroller?



Catching scroller position works, but how to get parent components from scroller?