From mboxrd@z Thu Jan 1 00:00:00 1970 Path: main.gmane.org!not-for-mail From: "Stefan Monnier" Newsgroups: gmane.emacs.devel Subject: Re: Gtk scrollbar: thumb too short Date: Mon, 07 Apr 2003 14:38:24 -0400 Sender: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Message-ID: <200304071838.h37IcO6F025197@rum.cs.yale.edu> References: <20030325193739.ZGIN3924.fep01-svc.swip.net@gaffa.gaia.swipnet.se> <3E8345E8.4090509@swipnet.se> <1048872463.17161.132.camel@localhost.localdomain> <1049134327.3326.74.camel@localhost.localdomain> <84of3p2m44.fsf@lucy.is.informatik.uni-duisburg.de> <200304021352.h32DqLO11793@eel.dms.auburn.edu> <1049729721.4045.47.camel@localhost.localdomain> <200304071657.h37Gv2LG024488@rum.cs.yale.edu> <1049740246.15331.51.camel@localhost.localdomain> NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: main.gmane.org 1049741405 19164 80.91.224.249 (7 Apr 2003 18:50:05 GMT) X-Complaints-To: usenet@main.gmane.org NNTP-Posting-Date: Mon, 7 Apr 2003 18:50:05 +0000 (UTC) Cc: Stefan Monnier Original-X-From: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Mon Apr 07 20:49:56 2003 Return-path: Original-Received: from quimby.gnus.org ([80.91.224.244]) by main.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 192bgq-0004xx-00 for ; Mon, 07 Apr 2003 20:49:56 +0200 Original-Received: from monty-python.gnu.org ([199.232.76.173]) by quimby.gnus.org with esmtp (Exim 3.12 #1 (Debian)) id 192bkT-0003Xg-00 for ; Mon, 07 Apr 2003 20:53:41 +0200 Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.10.13) id 192bW5-0005ra-02 for emacs-devel@quimby.gnus.org; Mon, 07 Apr 2003 14:38:49 -0400 Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.10.13) id 192bVo-0005qa-00 for emacs-devel@gnu.org; Mon, 07 Apr 2003 14:38:32 -0400 Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.10.13) id 192bVk-0005oo-00 for emacs-devel@gnu.org; Mon, 07 Apr 2003 14:38:31 -0400 Original-Received: from rum.cs.yale.edu ([128.36.229.169]) by monty-python.gnu.org with esmtp (Exim 4.10.13) id 192bVk-0005oc-00; Mon, 07 Apr 2003 14:38:28 -0400 Original-Received: from rum.cs.yale.edu (localhost [127.0.0.1]) by rum.cs.yale.edu (8.12.8/8.12.8) with ESMTP id h37IcPx6025199; Mon, 7 Apr 2003 14:38:25 -0400 Original-Received: (from monnier@localhost) by rum.cs.yale.edu (8.12.8/8.12.8/Submit) id h37IcO6F025197; Mon, 7 Apr 2003 14:38:24 -0400 X-Mailer: exmh version 2.4 06/23/2000 with nmh-1.0.4 Original-To: Owen Taylor Original-cc: rms@gnu.org Original-cc: Luc Teirlinck Original-cc: kai.grossjohann@gmx.net Original-cc: emacs-devel@gnu.org X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1b5 Precedence: list List-Id: Emacs development discussions. List-Help: List-Post: List-Subscribe: , List-Archive: List-Unsubscribe: , Errors-To: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Xref: main.gmane.org gmane.emacs.devel:12983 X-Report-Spam: http://spam.gmane.org/gmane.emacs.devel:12983 > > IIUC, the scrollbar widget has the following: > > > > total-size > > minimum thumb size > > thumb size > > thumb position > > > > Where minimum-thumb-size is (for all intents and purposes here) a constant. > > Let's simplify things and subtract minimum thumb size from the current > > thumb size and from the total, we get: > > > > total-size > > thumb size > > thumb position > > > > where > > > > 0 <= thumb-size <= total-size > > thumb-size + thumb-position <= total-size > > This isn't a "simplification", it is a different algorithm > from what GTK+ uses. The scrollbar thumb size in GTK+ > is: > > MAX (min_size, total_size * document_page_size/document_size) [ I assume that total_size = document_size to simplify the discussion ] So if min_size is 10, total_size is 100 and page_size is 1, how does the user get to see the last page ? Stefan