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bug#4127: marked as done (23.1; mwheel in --daemon mode)

From: Emacs bug Tracking System
Subject: bug#4127: marked as done (23.1; mwheel in --daemon mode)
Date: Sun, 16 Aug 2009 06:00:05 +0000

Your message dated Sun, 16 Aug 2009 01:56:19 -0400
with message-id <address@hidden>
and subject line Re: bug#4124: 23.1; mwheel in --daemon mode
has caused the Emacs bug report #4124,
regarding 23.1; mwheel in --daemon mode
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact address@hidden

4124: http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=4124
Emacs Bug Tracking System
Contact address@hidden with problems
--- Begin Message --- Subject: 23.1; mwheel in --daemon mode Date: Tue, 11 Aug 2009 13:34:08 -0400 User-agent: Gnus/5.110011 (No Gnus v0.11) Emacs/23.1 (darwin)
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 address@hidden 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

(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))
    (intern (format (if (featurep 'xemacs) "button%s" "mouse-%s")
  "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
 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 
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

--- End Message ---
--- Begin Message --- Subject: Re: bug#4124: 23.1; mwheel in --daemon mode Date: Sun, 16 Aug 2009 01:56:19 -0400
> > No.  The essential problem is that in 'x', the mouse wheel events are
> > 'mouse-4' and 'mouse-5', while in 'ns' and 'w32', the mouse wheel
> > events are 'wheel-up' and 'wheel-down'. 
> Indeed.  We should remap mouse-4/5 to wheel-up/down in term/x-win.el
> via function-key-map... So basically, I'd like to extend the
> function-key-map facilities so that you can have entries that remap a
> whole set of events, but it's still on the todo list.

In the meantime, we can just test for the `ns-win' and `w32-win'
features (or, equivalently, the system-type variable, but I think the
former are more to the point).  I checked in a fix to mwheel.el along
these lines.

--- End Message ---

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