From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Re: Physical keyboard events Date: Tue, 29 Oct 2024 17:13:57 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="36253"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: Cecilio Pardo Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Oct 29 18:14:57 2024 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 1t5po1-0009M8-4Q for ged-emacs-devel@m.gmane-mx.org; Tue, 29 Oct 2024 18:14:57 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t5pnL-0004tJ-5x; Tue, 29 Oct 2024 13:14:15 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t5pnJ-0004t7-Fb for emacs-devel@gnu.org; Tue, 29 Oct 2024 13:14:13 -0400 Original-Received: from mail.muc.de ([193.149.48.3]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t5pnF-0005M9-9K for emacs-devel@gnu.org; Tue, 29 Oct 2024 13:14:11 -0400 Original-Received: (qmail 25997 invoked by uid 3782); 29 Oct 2024 18:13:58 +0100 Original-Received: from muc.de (p4fe1578b.dip0.t-ipconnect.de [79.225.87.139]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Tue, 29 Oct 2024 18:13:57 +0100 Original-Received: (qmail 19989 invoked by uid 1000); 29 Oct 2024 17:13:57 -0000 Content-Disposition: inline In-Reply-To: X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de Received-SPF: pass client-ip=193.149.48.3; envelope-from=acm@muc.de; helo=mail.muc.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-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-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:324926 Archived-At: Hello, Cecilio. On Tue, Oct 29, 2024 at 00:15:22 +0100, Cecilio Pardo wrote: > Hello, > I'm planning to implement physical key press/release events for emacs. > I would add a new element to 'enum event_kind', that in turn would > send a new input event. This input event will be bound in > 'special-event-map' so that it will not modify the normal flow of > keyboard input. Platform dependent code would send these events > on key press and release. > Then a lisp fuction can be bound to this on the special-event-map, to > implement the detection of: > - double/triple tap on Shift, Control, Alt, etc > - Long presses on Shift, Control, Alt, etc. I envisage these leading to trouble. For example, my KVM box intercepts a sufficiently rapid double press on (either) Control key, and then expects a CR to switch computers, or ESC to cancel (and maybe there are other keys I don't know about). I quite frequently start typing a command by pressing the Control key, then change my mind and let it go again. I might sometimes hold that key while trying to decide what I want to do. The same surely applies to Meta as well. To make this work on a tty would involve fancy work on the keyboard layout if it's even possible. On a Linux console, it might even need enhancements to the kernel. I'm not sure binding our shift keys to commands, or even prefixes, is a good idea. > This actions could be bound to commands, or could add a modififer > (Super, Hyper) to next commands. > And make Tetris independent of the keyboard repeat rate :) > Has something like this been discussed before, so I can check? -- Alan Mackenzie (Nuremberg, Germany).