How to draw your own NSTabView tabs?

Question

I want to draw my own tabs for NSTabViewItems. My Tabs should look different and start in the top left corner and not centered.

How can I do this?

Answer 1

it is possible to set the NSTabView's style to Tabless and then control it with a NSSegmentedControl that subclasses NSSegmentedCell to override style and behavior. For an idea how to do this, check out this project that emulates Xcode 4 style tabs: https://github.com/aaroncrespo/WILLTabView/.