From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Leo Newsgroups: gmane.emacs.bugs Subject: bug#9543: 23.3.50; help-echo property Date: Sun, 18 Sep 2011 21:59:39 +0800 Message-ID: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1316354477 18289 80.91.229.12 (18 Sep 2011 14:01:17 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sun, 18 Sep 2011 14:01:17 +0000 (UTC) Cc: Chong Yidong To: 9543@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Sep 18 16:01:12 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1R5Hvi-00035k-Uc for geb-bug-gnu-emacs@m.gmane.org; Sun, 18 Sep 2011 16:01:11 +0200 Original-Received: from localhost ([::1]:35980 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1R5Hvi-0004MH-Ib for geb-bug-gnu-emacs@m.gmane.org; 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Sun, 18 Sep 2011 06:59:58 -0700 (PDT) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Sun, 18 Sep 2011 10:06:01 -0400 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 1) X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:51411 Archived-At: 1. Emacs -Q 2. eval (put 'x 'risky-local-variable t) (setq x '(:eval (propertize "x" 'help-echo (message "Wow")))) (push '("" x) global-mode-string) 3. Move point around and check how many Wow's are printed in *Messages* buffer The form (message "Wow") is eval'd each time mode-line is updated even though one didn't move mouse over the 'x' string on the mode-line. If the help-echo property is a function, it is only called when one moves the mouse over 'x'. Why this difference? Leo