On 23 Jun 2010, at 19:50, Kyle Sluder wrote:
> 
> To describe it a bit more visually, here's a diagram of our view hierarchy:
> 
> Scroll View
> |- Clip View
>  |- Accessory view
>  |- Document view
> 
> Calling -enclosingScrollView on the accessory view returns nil. I
> believe that it should return the scroll view.
> 
> One of the workarounds we're mulling over is to replace NSView's
> implementation of -enclosingScrollView to return the scroll view if
> the receiver is a descendant of the clip view. This makes sense to me,
> because I can't see a situation in which one would call
> -enclosingScrollView without the intent of obtaining "the scroll view
> that is responsible for scrolling me around." But since we don't have
> the source to AppKit, we can't be sure that AppKit doesn't rely on
> this behavior.
> 
Perhaps:

Define a -scrollViewSibling property/outlet on the accessory view and point it 
to the document view.

The NSView -enclosingScrollView override can check for a response to 
scrollViewSibling and 
conditionally send  -enclosingScrollView to it.
 
That way you are only overriding the -enclosingScrollView behaviour for views 
whose response is considered defective.

Regards

Jonathan Mitchell

Developer
Mugginsoft LLP
http://www.mugginsoft.com

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