GNU bug report logs - #6325
24.0.50; Fringe not correctly updated when using set-window-vscroll

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#6325: closed (24.0.50; Fringe not correctly updated when
 using set-window-vscroll)
Date: Mon, 05 Jul 2010 10:11:02 +0000

[Message part 1 (text/plain, inline)]

Your message dated Mon, 05 Jul 2010 19:10:38 +0900
with message-id <wl4oges0gx.wl%mituharu <at> math.s.chiba-u.ac.jp>
and subject line Re: bug#6325: 24.0.50; Fringe not correctly updated when using set-window-vscroll
has caused the GNU bug report #6325,
regarding 24.0.50; Fringe not correctly updated when using set-window-vscroll
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
6325: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=6325
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[Message part 2 (message/rfc822, inline)]

From: David Engster <deng <at> randomsample.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.0.50; Fringe not correctly updated when using set-window-vscroll
Date: Tue, 01 Jun 2010 15:24:13 +0200

(Note: This bug is also visible on Emacs 23).

Recipe:

* emacs -Q

* In the scratch buffer evaluate

  (progn
    (setq indicate-buffer-boundaries 'left)
    (insert (make-string 100 10))
    (goto-char (point-min))
    (forward-line 5)
    (redisplay)
    (set-window-vscroll nil 1))

* There are now two arrows in the fringe on the lower left side, but it
  should only be one at the bottom.

* Adding more 'set-window-vscrolls' will add more arrows. For example,
  this will create four:

  (progn
    (setq indicate-buffer-boundaries 'left)
    (insert (make-string 100 10))
    (goto-char (point-min))
    (forward-line 5)
    (redisplay)
    (set-window-vscroll nil 1)
    (redisplay)
    (set-window-vscroll nil 2)
    (redisplay)
    (set-window-vscroll nil 3))

* The same happens with pixel (fractional) scrolling, it'll just makes
  the arrows overlap:

  (progn
    (setq indicate-buffer-boundaries 'left)
    (insert (make-string 100 10))
    (goto-char (point-min))
    (forward-line 5)
    (redisplay)
    (set-window-vscroll nil 3 t))

Regards,
David

In GNU Emacs 24.0.50.1 (i686-pc-linux-gnu, GTK+ Version 2.20.1)
Windowing system distributor `The X.Org Foundation', version 11.0.10706000
configured using `configure  '--prefix=/opt/emacs24''

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: en_US.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: (only . t)

Recent input:
<down-mouse-2> <mouse-2> <left> <left> <left> SPC t 
<left> <left> 0 <backspace> <backspace> 3 C-e ) C-x 
C-e <down-mouse-1> <mouse-movement> <mouse-movement> 
<drag-mouse-1> M-x r e p o r t - e m <tab> <return
>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
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3

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[Message part 3 (message/rfc822, inline)]

From: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
To: David Engster <deng <at> randomsample.de>
Cc: 6325-done <at> debbugs.gnu.org
Subject: Re: bug#6325: 24.0.50;
	Fringe not correctly updated when using set-window-vscroll
Date: Mon, 05 Jul 2010 19:10:38 +0900

>>>>> On Wed, 30 Jun 2010 18:18:52 +0200, David Engster <deng <at> randomsample.de> said:

> I applied it to Emacs 23.2 and the problem is gone for me.

> Thank you! Looking at the patch, fixing this required quite some
> work.

Actually, pixel-unit mouse wheel scrolling in the Mac port uses window
vscroll extensively, and this bug has been annoying also for me.

Thanks for testing.  I've installed it to the emacs-23 branch.

				     YAMAMOTO Mitsuharu
				mituharu <at> math.s.chiba-u.ac.jp

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