From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Emacs and Gnome Canvas Date: Thu, 15 Jul 2010 11:38:36 +0300 Message-ID: <83d3upgmwj.fsf@gnu.org> References: <4C3CD120.4040905@swipnet.se> <5A91499A-0470-43FD-9F48-560CEAD3424C@mit.edu> <83wrsyr068.fsf@gnu.org> <83iq4hhjww.fsf@gnu.org> <87sk3lbvv0.fsf@telefonica.net> <83hbk1grnq.fsf@gnu.org> <4C3EBCDC.8050709@swipnet.se> Reply-To: Eli Zaretskii NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE X-Trace: dough.gmane.org 1279183268 21163 80.91.229.12 (15 Jul 2010 08:41:08 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Thu, 15 Jul 2010 08:41:08 +0000 (UTC) Cc: ofv@wanadoo.es, emacs-devel@gnu.org To: =?UTF-8?B?SmFuIERqw6Rydg==?= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Jul 15 10:41:07 2010 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1OZK05-0003aH-6P for ged-emacs-devel@m.gmane.org; Thu, 15 Jul 2010 10:41:01 +0200 Original-Received: from localhost ([127.0.0.1]:55353 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OZK04-0001cE-JD for ged-emacs-devel@m.gmane.org; Thu, 15 Jul 2010 04:41:00 -0400 Original-Received: from [140.186.70.92] (port=48956 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OZJzz-0001c9-Dh for emacs-devel@gnu.org; Thu, 15 Jul 2010 04:40:56 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OZJzy-0002Yr-5u for emacs-devel@gnu.org; Thu, 15 Jul 2010 04:40:55 -0400 Original-Received: from mtaout22.012.net.il ([80.179.55.172]:62378) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OZJzx-0002Ym-Vr for emacs-devel@gnu.org; Thu, 15 Jul 2010 04:40:54 -0400 Original-Received: from conversion-daemon.a-mtaout22.012.net.il by a-mtaout22.012.net.il (HyperSendmail v2007.08) id <0L5L00J00BP5FD00@a-mtaout22.012.net.il> for emacs-devel@gnu.org; Thu, 15 Jul 2010 11:40:33 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([77.127.120.144]) by a-mtaout22.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0L5L00EVKC3JVUD0@a-mtaout22.012.net.il>; Thu, 15 Jul 2010 11:40:32 +0300 (IDT) In-reply-to: <4C3EBCDC.8050709@swipnet.se> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 (beta) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:127332 Archived-At: > Date: Thu, 15 Jul 2010 09:46:36 +0200 > From: Jan Dj=C3=A4rv > CC: =C3=93scar Fuentes ,=20 > emacs-devel@gnu.org >=20 > > . Canvas redisplay is caused by requests from the application t= o > > update some "canvas item" when the underlying application's o= bjects > > are modified; these requests are then served when GTK+ idle > > handlers are run. Emacs display engine works differently: ch= anges > > that require redisplay are not considered until redisplay is > > entered; the "requests" to update the display are implicitly > > recorded in the buffers and in the various related data struc= tures > > (text properties and overlays, display strings, etc.), but no= t > > explicitly translated to display terms until redisplay time, = and as > > an inherent part of redisplay itself. These two very differe= nt > > models will need to be reconciled in some reasonably efficien= t way. >=20 > The changes that require redisplay would have to notify the Canvas = that things=20 > changed. I think this style is more efficient. What do you mean by "changes that require redisplay"? Suppose a character was inserted or deleted -- would that need to notify the Canvas? How about an arbitrary mouse move?