RE: set-frame-position - is it a bug?

[Drew Adams]

This bug was apparently never fixed. To reproduce, simply resize a frame
horizontally so that the menu-bar wraps, then change the 'left frame
parameter.

(setq left-pos (cdr (assq 'left (frame-parameters))))
(modify-frame-parameters (selected-frame)
  (list (cons 'left (+ 30 left-pos))))

The frame moves down, as well as right.

This is annoying if you have, for instance, a key bound to a command to move
the frame right. Repeated use of this key sends the frame downward
diagonally. Use of the complementary key to move the frame left sends it
downward as well, so the two are not even inverses if the menu-bar wraps.

Similarly, a command to move the frame up sends it down instead. So, if you
have keys bound to commands that move it up and down, the up movement is
down instead - the two are not inverses if the menu-bar wraps.

    Sent: Friday, August 05, 2005 7:39 AM
    To: address@hidden
    Cc: Emacs-Devel
    Subject: RE: set-frame-position - is it a bug?

        the intention of the following code
          (setq fpx (cdr (assoc 'left (frame-parameters))))
          (setq fpy (cdr (assoc 'top  (frame-parameters))))
          (setq fpx (+ 1 fpx))
          (set-frame-position (next-frame) fpx fpy)
        is to move the frame honizontally 1 pixel right;
        but as a side-effect I get a vertical move as well.
        Is there something wrong with my code?

    The code looks OK to me.

    Is your menu-bar (or tool-bar) wider than your frame, so that it wraps
    around? That will cause the behavior you describe.

    Actually, now that I think of it, we should probably consider
    this an Emacs bug, so I'm cc'ing the emacs-devel list. Thanks for
    bringing this up - I've been aware of it for a long time, but it
    never occurred to me to file a bug.

    Bug: If menu-bar is wider than frame, so it wraps, then
    set-frame-position gets it wrong, in the manner described above.