From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#14744: 24.3.50; Flickering mouse-face on process output Date: Sat, 29 Jun 2013 11:08:51 -0400 Message-ID: References: <87r4flzshg@ch.ristopher.com> <83k3lde4v7.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1372518610 30602 80.91.229.3 (29 Jun 2013 15:10:10 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 29 Jun 2013 15:10:10 +0000 (UTC) Cc: Christopher Schmidt , 14744@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Jun 29 17:10:10 2013 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Uswmv-0006Jo-Me for geb-bug-gnu-emacs@m.gmane.org; Sat, 29 Jun 2013 17:10:09 +0200 Original-Received: from localhost ([::1]:42409 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Uswmv-00008Y-7r for geb-bug-gnu-emacs@m.gmane.org; Sat, 29 Jun 2013 11:10:09 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47186) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Uswmq-00005p-7L for bug-gnu-emacs@gnu.org; Sat, 29 Jun 2013 11:10:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Uswmp-0003ZF-9Z for bug-gnu-emacs@gnu.org; Sat, 29 Jun 2013 11:10:04 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:54067) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Uswmp-0003Xx-3q for bug-gnu-emacs@gnu.org; Sat, 29 Jun 2013 11:10:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Uswmo-0003qH-89 for bug-gnu-emacs@gnu.org; Sat, 29 Jun 2013 11:10:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 29 Jun 2013 15:10:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 14744 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 14744-submit@debbugs.gnu.org id=B14744.137251854114685 (code B ref 14744); Sat, 29 Jun 2013 15:10:02 +0000 Original-Received: (at 14744) by debbugs.gnu.org; 29 Jun 2013 15:09:01 +0000 Original-Received: from localhost ([127.0.0.1]:48383 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Uswlo-0003oi-UQ for submit@debbugs.gnu.org; Sat, 29 Jun 2013 11:09:01 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.182]:59411) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Uswlm-0003oU-Ar for 14744@debbugs.gnu.org; Sat, 29 Jun 2013 11:08:58 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av8EABK/CFFMCppA/2dsb2JhbABEuzWDWRdzgh4BAQQBViMFCws0EhQYDSSIHgbBLY0Og3wDpHqBXoMT X-IPAS-Result: Av8EABK/CFFMCppA/2dsb2JhbABEuzWDWRdzgh4BAQQBViMFCws0EhQYDSSIHgbBLY0Og3wDpHqBXoMT X-IronPort-AV: E=Sophos;i="4.84,565,1355115600"; d="scan'208";a="17452187" Original-Received: from 76-10-154-64.dsl.teksavvy.com (HELO pastel.home) ([76.10.154.64]) by ironport2-out.teksavvy.com with ESMTP/TLS/ADH-AES256-SHA; 29 Jun 2013 11:08:46 -0400 Original-Received: by pastel.home (Postfix, from userid 20848) id D0F3F6A679; Sat, 29 Jun 2013 11:08:51 -0400 (EDT) In-Reply-To: <83k3lde4v7.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 29 Jun 2013 10:46:36 +0300") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:75718 Archived-At: >> emacs -q >> C-x 2 >> M-x shell RET >> cat /dev/urandom RET >> C-x o >> # Move mouse on one of the buttons so the face changes to highlight >> The button flickers here. >> Xorg and GTK+ 2.24.10 on GNU/Linux and current Emacs trunk. This issue >> is easily reproducible on older Emacsen, such as 24.3 or 23.4. > Redisplay of a window always includes redisplay of the tool bar. The > latter involves drawing the buttons, and then applying the depressed > faced to the button that the mouse pointer hovers above. That is what > you see, I believe. So why do you consider that a bug? I consider it a bug because some part of the screen flickers. I understand the underlying technical reason why Emacs does that, but it's still a misfeature. Ideally we should refrain from redrawing things that haven't changed, and the second best fix is to use some kind of double buffering so the intermediate "drawn but not depressed" state is kept hidden. Stefan