Subject: Re: bug#31968: 26.1.50; Allow to hide title bar on maximize (gtk/gnome/csd)

From: martin rudalics <[email-masked]>
Date: Thu, 28 Jun 2018 10:02:24 +0200

>> Yes, but the point is to hook something like that on
 >> maximized/unmaximized events, which I don't see how to do.
 >
 > Since maximizing a frame changes the window size, couldn't you hook
 > into window-size-change-functions to achieve the desired effect?
 > Something like this perhaps:
 >
 > (defun hide-titlebar-when-maximized (frame)
 >    (if (eq 'maximized (alist-get 'fullscreen (frame-parameters frame)))
 >        (set-frame-parameter frame 'undecorated t)
 >      (set-frame-parameter frame 'undecorated nil)))
 >
 > (add-hook 'window-size-change-functions 'hide-titlebar-when-maximized)

Wouldn't that show the title bar when making the frame fullscreen via
F11?

martin