GNU bug report logs - #9543
23.3.50; help-echo property

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Package: emacs;

Reported by: Leo <sdl.web <at> gmail.com>

Date: Sun, 18 Sep 2011 14:06:01 UTC

Severity: normal

Found in version 23.3.50

Done: Leo <sdl.web <at> gmail.com>

Bug is archived. No further changes may be made.

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From: Leo <sdl.web <at> gmail.com>
To: 9543 <at> debbugs.gnu.org
Cc: Chong Yidong <cyd <at> stupidchicken.com>
Subject: bug#9543: 23.3.50; help-echo property
Date: Sun, 18 Sep 2011 21:59:39 +0800

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
This bug report was last modified 13 years and 307 days ago.

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