From: Michael Heerdegen <michael_heerdegen@web.de>
To: help-gnu-emacs@gnu.org
Subject: Re: Recognizing active/inactive mode-line in (:eval ...) form in mode-line-string
Date: Fri, 01 Mar 2013 20:21:00 +0100 [thread overview]
Message-ID: <87lia70vvn.fsf@web.de> (raw)
In-Reply-To: <mailman.21116.1362070608.855.help-gnu-emacs@gnu.org> (Alessandro Piras's message of "Thu, 28 Feb 2013 12:25:27 +0100")
Alessandro Piras <laynor@gmail.com> writes:
> Is there a way to know if the mode-line is active in a (:eval ...)
> form inside the mode-line-string?
>
> A simple example:
> mode-line-string =>
> ("%e" (:eval (if <condition> "foo" "bar")))
>
> I would like to see "foo" on the mode-line of the active window,
> "bar" on the others.
This is a very good question!
AFAICT, when the mode-line of any window is calculated, it is
temporarily selected. This would mean that such a condition doesn't
exist. So, you'll need some trick, e.g. something like
--8<---------------cut here---------------start------------->8---
(add-hook 'post-command-hook
(lambda () (setq my-selected-window (selected-window))))
(push '(:eval (if (eq (selected-window) my-selected-window)
"foo" "bar")) default-mode-line-format)
--8<---------------cut here---------------end--------------->8---
i.e., try to remember and update the selected window in a global
variable. Probably this can be achieved more elegantly than above.
Note that you still may have to force a mode-line update to always have
the right "foo" or "bar".
Regards,
Michael.
next parent reply other threads:[~2013-03-01 19:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.21116.1362070608.855.help-gnu-emacs@gnu.org>
2013-03-01 19:21 ` Michael Heerdegen [this message]
2013-02-28 11:25 Recognizing active/inactive mode-line in (:eval ...) form in mode-line-string Alessandro Piras
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