GNU bug report logs - #4124
23.1; mwheel in --daemon mode

Previous Next

Full log

View this message in rfc822 format

From: John Prevost <prevost1 <at> cert.org>
To: bug-gnu-emacs <at> gnu.org
Subject: bug#4124: 23.1; mwheel in --daemon mode
Date: Tue, 11 Aug 2009 11:47:55 -0400

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the bug-gnu-emacs <at> gnu.org mailing list,
and to the gnu.emacs.bug news group.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

When emacs is started in --daemon mode, the window-system variable is
initially 'nil'.  In mwheel.el, mouse-wheel-down-event and
mouse-wheel-up-event are bound with defcustom declarations like the
following:

(defcustom mouse-wheel-down-event
  ;; In the latest versions of XEmacs, we could just use mouse-%s as well.
  (if (memq window-system '(w32 ns))
      'wheel-up
    (intern (format (if (featurep 'xemacs) "button%s" "mouse-%s")
		    mouse-wheel-down-button)))
  "Event used for scrolling down."
  :group 'mouse
  :type 'symbol
  :set 'mouse-wheel-change-button)

Since these run before any terminal is created in the --daemon case,
window-system may not be set to anything at all.

It is possible that this is a bug in mwheel, and that mwheel (and other
packages) should take care not to make use of the window-system variable
until startup.  (This may be particularly important if it's possible for
a single emacs binary to have support for multiple window systems.)

It is possible that a better solution to the problem that mwheel solves
above would be for either term/x-win.el to define-key mouse-4 and
mouse-5 to wheel-up and wheel-down, or for term/w32-win.el and
term/ns-win.el to define-key wheel-up and wheel-down to mouse-4 and
mouse-5, so that mwheel and other packages can use the same symbol on
all window systems.


Either way, the current state of the world is that --daemon results in a
non-functional mouse wheel on w32 and ns.


If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/Users/prevost1/Documents/src/emacs-23.1/nextstep/Emacs.app/Contents/Resources/etc/DEBUG for instructions.


In GNU Emacs 23.1.1 (i386-apple-darwin9.7.0, NS apple-appkit-949.46)
 of 2009-08-07 on TELPERION.WV.CC.CMU.EDU
Windowing system distributor `Apple', version 10.3.949
configured using `configure  '--prefix=/opt/emacs-23.1' '--with-ns''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Fundamental

Minor modes in effect:
  diff-auto-refine-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  global-auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<help-echo> s-x r e p o r t M-x r e p o t <backspace> 
r t - e m <tab> <return>

Recent messages:
Loading /Users/prevost1/Documents/src/elisp/nxml-mode/rng-auto.el (source)...done
Loading /Users/prevost1/Documents/src/elisp/mercurial.el (source)...done
For information about GNU Emacs and the GNU system, type C-h C-a.
Terminal setup done
kill-region: The mark is not set now, so there is no region

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.