From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Po Lu Newsgroups: gmane.emacs.devel Subject: Re: master e37eb7f: Add support for pixel wheel deltas on NS Date: Sat, 27 Nov 2021 14:41:50 +0800 Message-ID: <875ysecd75.fsf@yahoo.com> References: <20211125030922.2353.1129@vcs0.savannah.gnu.org> <20211125030924.7258E2094B@vcs0.savannah.gnu.org> <871r34h6pi.fsf@gmail.com> <87fsrkzfq1.fsf@yahoo.com> <83tug05whz.fsf@gnu.org> <87tufzycli.fsf@yahoo.com> <837dcv4e79.fsf@gnu.org> <87wnkvflk7.fsf@yahoo.com> <83zgpr2uvr.fsf@gnu.org> <87fsrjfeb1.fsf@yahoo.com> <83r1b32lvr.fsf@gnu.org> <877dcvf8ec.fsf@yahoo.com> <831r323lgs.fsf@gnu.org> <87v90ecvoa.fsf@yahoo.com> <83lf1a1651.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="37998"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.60 (gnu/linux) Cc: rpluim@gmail.com, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Nov 27 07:44:12 2021 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mqrRU-0009hn-3r for ged-emacs-devel@m.gmane-mx.org; 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Sat, 27 Nov 2021 06:41:58 +0000 Original-Received: by kubenode512.mail-prod1.omega.sg3.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 069fbfe942bcacbaa7dd2a2a190b3392; Sat, 27 Nov 2021 06:41:55 +0000 (UTC) In-Reply-To: <83lf1a1651.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 27 Nov 2021 08:09:46 +0200") X-Mailer: WebService/1.1.19306 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Received-SPF: pass client-ip=66.163.191.146; envelope-from=luangruo@yahoo.com; helo=sonic304-20.consmr.mail.ne1.yahoo.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:280294 Archived-At: Eli Zaretskii writes: >> > What pixel-delta values are typically reported on X for a single >> > click of the mouse wheel? ^^^^^ >> A click (i.e. a movement where precise information is unavailable)? > Why are you saying "click" when we are talking about mouse wheel. The > wheel is not clicked when the user wants to scroll, the wheel is > turned. That is what you said, right? >> Typically 1 scroll unit is reported, which would be: >> >> 1.0 * pow (FRAME_PIXEL_HEIGHT (f), 2.0 / 3.0) > ??? That's about 100 pixels on a reasonably-sized frame. How can such > large values support "precision pixelwise scrolling"? > Are we talking about the same thing? I was asking about the smallest > values of the deltas reported in the mouse wheel-up and wheel-down > events when the user turns the wheel the smallest amount possible. Ahh, I understand what you're asking now. The smallest value reported is usually to 0.01 or so, after conversion into scroll units. On a reasonably sized frame that would be 1 to 2 pixels. I thought you were asking about the value reported before X sends a legacy ButtonPress event for button 4/5/6/7. Thanks.