From: "Drew Adams" <drew.adams@oracle.com>
To: "'Johan \"Bockgård\"'" <bojohan+news@dd.chalmers.se>,
emacs-devel@gnu.org
Subject: RE: mode-line-format - local variableness
Date: Sun, 5 Apr 2009 16:37:18 -0700 [thread overview]
Message-ID: <004b01c9b647$75e428f0$0200a8c0@us.oracle.com> (raw)
In-Reply-To: <004a01c9b646$5b15efa0$0200a8c0@us.oracle.com>
Summary (with no understanding of why, beyond the catechismic
don't-use-let-use-setq):
This will not work:
(defun foo (text &optional buffer)
(with-current-buffer (or buffer (current-buffer))
(let ((mode-line-format text))
(force-mode-line-update) (sit-for 2))
(force-mode-line-update)))
This works (ugh!):
(defun foo (text &optional buffer)
(with-current-buffer (or buffer (current-buffer))
(let ((old-mode-line-format mode-line-format))
(setq mode-line-format text)
(force-mode-line-update) (sit-for 2)
(setq mode-line-format old-mode-line-format))
(force-mode-line-update)))
Don't `let'-bind `mode-line-format', but you can `let'-bind something to its
value and then restore that later. Ugh!
next prev parent reply other threads:[~2009-04-05 23:37 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-05 22:18 mode-line-format - local variableness Drew Adams
2009-04-05 22:50 ` Johan Bockgård
2009-04-05 23:24 ` Miles Bader
2009-04-05 23:29 ` Drew Adams
2009-04-05 23:37 ` Drew Adams [this message]
2009-04-06 0:50 ` Miles Bader
2009-04-06 3:05 ` Drew Adams
2009-04-06 1:37 ` Stefan Monnier
2009-04-06 3:19 ` Drew Adams
2009-04-06 13:30 ` Stefan Monnier
2009-04-06 21:37 ` Miles Bader
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