GNU bug report logs - #23510
Strange redisplay in global highlighted mode moving the scroll bar

Previous Next

Full log

View this message in rfc822 format

From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stephen Berman <stephen.berman <at> gmx.net>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#23510: closed (Strange redisplay in global highlighted mode
 moving the scroll bar)
Date: Thu, 26 May 2016 09:36:01 +0000

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

Your message dated Thu, 26 May 2016 11:34:34 +0200
with message-id <87eg8pnowl.fsf <at> gmx.net>
and subject line Re: Strange redisplay in global highlighted mode moving the scroll bar
has caused the debbugs.gnu.org bug report #23510,
regarding Strange redisplay in global highlighted mode moving the scroll bar
to be marked as done.

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


-- 
23510: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=23510
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: "angelo.graziosi <at> libero.it" <angelo.graziosi <at> libero.it>
To: bug-gnu-emacs <at> gnu.org
Subject: Strange redisplay in global highlighted mode moving the scroll bar
Date: Tue, 10 May 2016 21:31:26 +0200 (CEST)

Maybe this is not a bug but I want to flag for completeness..

The following should be reproducible with the following simple init.el:

$ cat init.el
;;
(global-hl-line-mode 1)

 
Now, in the scratch buffer, copy and paste many times its text (;; This 
buffer...) so that the scratch buffer has many lines, not all contained in the 
Emacs window/frame. Move the cursor on a line, more or less at the center of 
the window. The line is highlighted (in green, by default). Now move slowly 
up/down the scroll bar, then the highlighted line seems to flicker as if it 
were redrawn at (almost) each pixel movement of the scroll bar.

Is this to be expected? Other software with same feature do not show this 
"flickering" and the highlight moves synchronously with the text.

The effect is visible not only with vertical scroll bar but also with the 
horizontal.

I see this with my master builds on Windows, GNU/linux and OSX.


Angelo

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

From: Stephen Berman <stephen.berman <at> gmx.net>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 23510-done <at> debbugs.gnu.org, Angelo Graziosi <angelo.graziosi <at> alice.it>
Subject: Re: Strange redisplay in global highlighted mode moving the scroll bar
Date: Thu, 26 May 2016 11:34:34 +0200

On Thu, 26 May 2016 05:44:48 +0300 Eli Zaretskii <eliz <at> gnu.org> wrote:

>> Cc: 23510 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>
>> From: Angelo Graziosi <angelo.graziosi <at> alice.it>
>> Date: Thu, 26 May 2016 00:13:28 +0200
>> 
>> Any news about this issue? I am still using an Emacs build with 
>> Stephen's patch and I see no problem...
>
> Would someone please install that?

Done in commit 16be3e90545972dec16014253a843229d5bdf388 to master and
closing the bug.

Steve Berman

Previous Next

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