How to customize NSMenu like the Apple Pro Apps?

Question

I want to customize a NSMenu with NSMenuItems, so does it looks like the Apple Pro Apps.

But how can I customize a NSMenu? There is no draw method to change the appearance. If I set a NSView to a NSMenuItem, I can set the background color, but I will loose highlighting and menu handling. Furthermore the top and bottom cap of the NSMenu cannot be customized.

I found only this hint, but unfortunately without code.

I would be very happy for some help!

Answer 1

The hard answer is, make your own, subclass NSMenu, NSMenuItem etc and manually handle the drawing, animations etc.