Re: Emacs's set-frame-size can not work well with gnome-shell?

[martin rudalics]

>> Can you move around 'test-frame' by mouse-dragging its mode line?
>
> I can't make it work at all, neither in the child frame, nor in any normal 
frame, independent of how the frame parameter was set.

Sorry, it works only for minibuffer-less (or minibuffer-only) child
frames.  The following snippet should work:


(custom-set-faces
 '(internal-border ((t (:background "red")))))

(defun open-test (buffer)
  (display-buffer-in-child-frame
   buffer '((child-frame-parameters
             . ((width . 40)
                (height . 10)
                (top . 50)
                (left . 50)
                (minibuffer . nil)
                (internal-border-width . 10)
                (drag-internal-border . t)
                (drag-with-mode-line . t)
                )))))

(setq-local test-buffer (get-buffer-create "*test child-frame*"))
(setq-local test-frame (window-frame (open-test test-buffer)))


This should allow to (1) drag the frame around with mouse-1 down on the
mode line and (2) draw a 10 pixel wide red internal border (color
visible only after a redisplay, maybe) I can use here to resize the
frame with mouse-1 (Emacs resizing natively).  Both work quite snappy
here with an optimized build running under Xfce on an old-stable Debian.
Feedback from other (not necessarily company-) users welcome.

martin