I went ahead and filed an enhancement request on this one - rdar://7667092

On Feb 18, 2010, at 11:55 AM, Eric Gorr wrote:

> Other then creating a dummy NSScoller and incrementally decreasing it's 
> height until usableParts returns 0, is there any easy way to determine what 
> the minimum height of a vertical scrollbar should be so that usableParts will 
> not return NSNoScrollerParts?
> 
> What I need to be able to do is limit the height of my window based, in part, 
> on whether or not a vertical scrollbar will have usable parts.

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