From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Ken Goldman Newsgroups: gmane.emacs.help Subject: Re: Refresh display after changing variable Date: Tue, 3 Aug 2021 11:42:45 -0400 Message-ID: <080b7d73-e4c8-eaf4-fc92-60f28bee288f@us.ibm.com> References: <83k0l3n5hf.fsf@gnu.org> <83h7g7my8k.fsf@gnu.org> <875ywny392.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="29578"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Aug 03 17:43:27 2021 Return-path: Envelope-to: geh-help-gnu-emacs@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 1mAwZi-0007Vs-LP for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 03 Aug 2021 17:43:26 +0200 Original-Received: from localhost ([::1]:51916 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mAwZg-0002BP-Tf for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 03 Aug 2021 11:43:24 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:46888) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mAwZG-0002BH-Ln for help-gnu-emacs@gnu.org; Tue, 03 Aug 2021 11:42:58 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:54480) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mAwZF-0005IV-Bm for help-gnu-emacs@gnu.org; Tue, 03 Aug 2021 11:42:58 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1mAwZC-0006xA-UP for help-gnu-emacs@gnu.org; Tue, 03 Aug 2021 17:42:54 +0200 X-Injected-Via-Gmane: http://gmane.org/ In-Reply-To: Content-Language: en-US Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.248, NICE_REPLY_A=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:132343 Archived-At: On 8/2/2021 5:26 PM, 2QdxY4RzWzUUiLuE@potatochowder.com wrote: > On 2021-08-02 at 22:56:41 +0200, > Michael Heerdegen wrote: > >> Eli Zaretskii writes: >> >>>> From: Ken Goldman >>>> Date: Mon, 2 Aug 2021 15:36:01 -0400 >>>> >>>>> (defun kg-toggle-whitespace-line-column () >>>>> "Toggle whitespace line column between 80 and 101" >>>>> (interactive) >>>>> (setq whitespace-line-column (if (= whitespace-line-column >>>>> 80) 101 80)) >>>>> (whitespace-mode 1)) > > FWIW, I have the following snippet in a function I wrote to change > tab-width: > > (let ((w (get-buffer-window (current-buffer)))) > (set-window-start w (window-start w))) > > and a note that I stole that snippet from scroll-bar-maybe-window-start > in scroll-bar.el. That function doesn't exist anymore (in Emacs 27.2), > but scroll-bar-set-window-start in scroll-bar.el does end as follows: > > (set-window-start window (point)))))) > That line, in the function, yields kg-toggle-whitespace-line-column: Symbol’s value as variable is void: window