title: How do I manually highlight an NSPopUpButtonCell when drawing it (draw it using white instead of black)?
body: <p>I've got a custom cell composed out of several cells, one of which is an NSPopUpButtonCell.</p>
  
  <p>When drawing my custom cell highlighted, I want to cause all the sub-cells to highlight as well (typically by turning white).</p>
  
  <p>With, for example an NSTextCell, if I call <code>setHighlighted:YES</code> before calling <code>drawWithFrame:inView</code> the cell will be drawn with white text, exactly as I want it.</p>
  
  <p>This does not work with NSPopUpButtonCells. The text just continues to draw as black.</p>
  
  <p>It seems like this should be possible, since dropping an NSPopUpButtonCell into an NSTableView highlights properly.</p>
  
  <p>Can somebody point me in the right direction for fixing this?</p>