title: Overlay NSScroller over content
body: <p>Is there any way to overlay the NSScroller <strong>over</strong> the content of the scroll view (like in iOS)? I've already tried several approaches:</p>
  
  <p><strong>a)</strong> setting the frame of the scroll view content view (NSClipView) to extend into the bounds of the scroller</p>
  
  <p><strong>b)</strong> adding an NSScroller object as a subview of the scroll view (positioned where I want)</p>
  
  <p><strong>c)</strong> creating an entirely custom scroller view and placing it as a subview (this worked, but that would mean that I need to rewrite all the functionality of NSScroller)</p>
  
  <p><a href="http://www.sparrowmailapp.com/">Sparrow</a> seems to successfully do this, and it seems to do it through a regular NSScroller subclass (seeing as it responds to the scroll settings set in System Preferences >> Appearance). It's not really drawing the scroller that's the issue, its just making it overlay the content.</p>
  
  <p>Any advice is appreciated :-)</p>