From: Leo <sdl.web@gmail.com>
To: 9543@debbugs.gnu.org
Cc: Chong Yidong <cyd@stupidchicken.com>
Subject: bug#9543: 23.3.50; help-echo property
Date: Sun, 18 Sep 2011 21:59:39 +0800 [thread overview]
Message-ID: <m1ehzej6ic.fsf@gmail.com> (raw)
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
next reply other threads:[~2011-09-18 13:59 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-18 13:59 Leo [this message]
2011-09-19 12:57 ` bug#9543: 23.3.50; help-echo property Stefan Monnier
2011-09-19 13:58 ` Leo
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