title: Screen location of NSToolbarItem
body: <p>How can I get the on-screen location of a button in a toolbar?  That is getting the rectangle frame of an <code>NSToolbarItem</code>?  The <code>[NSToolbarItem view]</code> method seems to always return <code>nil</code> whenever the toolbar item is only a simple action button and thus I couldn't use the normal <code>NSView</code> methods to pinpoint the toolbar button's on-screen position.  </p>
  
  <p><strong>Background</strong></p>
  
  <p>I'm trying to use Matt Gemmell's <a href="http://mattgemmell.com/2007/10/03/maattachedwindow-nswindow-subclass" rel="nofollow noreferrer"><code>MAAttachedWindow</code></a> component to point to a specific toolbar button.  The component requires an <code>NSPoint</code> object to "point" the user to a location on the screen.</p>
  
  <p>Thanks in advance.</p>