GNU bug report logs - #19721
25.0.50; Mode-line not redrawn with expose events

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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>
Subject: bug#19721: closed (Re: bug#19721: 25.0.50; Mode-line not redrawn
 with expose events)
Date: Mon, 02 Feb 2015 16:18:02 +0000

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Your bug report

#19721: 25.0.50; Mode-line not redrawn with expose events

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 19721 <at> debbugs.gnu.org.

-- 
19721: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=19721
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Eli Zaretskii <eliz <at> gnu.org>
To: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
Cc: 19721-done <at> debbugs.gnu.org
Subject: Re: bug#19721: 25.0.50; Mode-line not redrawn with expose events
Date: Mon, 02 Feb 2015 18:16:47 +0200

> Date: Mon, 02 Feb 2015 12:27:39 +0900
> From: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
> Cc: 19721 <at> debbugs.gnu.org
> 
> >>>>> On Sun, 01 Feb 2015 17:33:10 +0200, Eli Zaretskii <eliz <at> gnu.org> said:
> 
> > How about the patch below?  (Once again, it's wrt the current emacs-24
> > branch.)
> 
> This works fine on my side.  Thanks.

Thanks, I pushed this as commit e9a7e10 to the emacs-24 branch.

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From: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.0.50; Mode-line not redrawn with expose events
Date: Thu, 29 Jan 2015 19:51:24 +0900

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This bug is related to the mode-line erasure problem I mentioned in
http://lists.gnu.org/archive/html/emacs-devel/2015-01/msg01040.html .

To reproduce the problem by the instruction below, you would need to
make sure that your X11 compositing manager is turned off.  I tested
on Cent OS 5.11, default setting.  See also
http://lists.gnu.org/archive/html/emacs-devel/2013-04/msg00600.html .

Steps to reproduce:

1. Create a file (say, ~/test.el) containing the following contents:

  (custom-set-faces
   '(mode-line ((((class color) (min-colors 88)) (:background
     "grey75" :foreground "black" :box (:line-width 2 :color
     "grey75" :style released-button)))))
   )

2. $ emacs -Q -D -l ~/test.el
3. C-x 2 C-x 2 C-x 2
4. C-x o C-x o C-x o
5. Move another window (e.g., the terminal window from which Emacs is
   invoked) so that it hovers over the Emacs frame.

Result:

The upper two mode-lines among four are not redrawn after their hidden
part is revealed (see the attachment).  They are not redrawn in
response to expose events because the flag `enabled_p' for these
mode-line glyph rows have been set to false.

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

In GNU Emacs 25.0.50.1 (i686-pc-linux-gnu, GTK+ Version 2.10.4)
 of 2015-01-29 on localhost.localdomain
Windowing system distributor `The X.Org Foundation', version 11.0.70101000
System Description:	CentOS release 5.11 (Final)

Configured features:
XPM JPEG TIFF GIF PNG SOUND LIBSELINUX FREETYPE XFT ZLIB

[mode-line-erasure.png (image/png, inline)]

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