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: Eli Zaretskii <eliz <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#19721: closed (25.0.50; Mode-line not redrawn with expose events)
Date: Mon, 02 Feb 2015 16:18:01 +0000

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Your message dated Mon, 02 Feb 2015 18:16:47 +0200
with message-id <83lhkggufk.fsf <at> gnu.org>
and subject line Re: bug#19721: 25.0.50; Mode-line not redrawn with expose events
has caused the debbugs.gnu.org bug report #19721,
regarding 25.0.50; Mode-line not redrawn with expose events
to be marked as done.

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


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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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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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