On Sat, Apr 15, 2017 at 09:39:32PM +0200, martin rudalics wrote:
> > It appears that a child window in NS is just a normal window which
> > moves and closes with its parent. So I think that means it’s more like
> > X’s child windows, except they don’t get clipped at the parent
> > window’s edges. They can also end up below the parent window.
> 
> It sounds like NS can do more than Windows and X here.  The clipping
> issue is a nuisance.  Could you try to create one and play around with
> it a bit?

I’ve attached a partial patch for NS. It should handle undecorated
frames and parent‐child frame relationships. I’ll keep working on the
rest, but thought I’d throw this out there in case anyone can spot
anything obviously wrong.

Anders, I hope it’s OK CCing you in. I think you might appreciate the
following (after applying the patch):

emacs -Q

(set-frame-parameter nil 'undecorated t)
(setq ns-auto-hide-menu-bar t)
(toggle-frame-maximized)

More info at:

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=25408#77
-- 
Alan Third