Is there an open-source library for Cocoa to create a window following iTunes\' style? That is the window controls are laid out vertically instead of horizontally:
You'll probably have to subclass NSWindow, NSView and do the window and buttons drawing yourself.
Oh and just wanted to add that you lose some quite important details doing custom drawing. Since the drawing is done in the main thread and your main thread might get busy doing some heavy important task blocking the main thread execution for a while, user won't be able to move the window and they button mouse over animation won't work.
Unless of course you implement mouse listening events in another thread, do the drawing there, lock focus... What I meant was - don't bother unless you really think this will make your app much better :)