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Commentary enhancement in frame.el

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* lisp/frame.el: Explain how to test whether a variable needs to
be added to the list of those which are watched for buffer
redisplay.
This commit is contained in:
Eli Zaretskii 2017-07-08 11:08:55 +03:00
parent 5df239fc6f
commit 6e2a2b334d
1 changed files with 7 additions and 1 deletions
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8
lisp/frame.el
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@ -2458,7 +2458,13 @@ See also `toggle-frame-maximized'."
(make-obsolete-variable
'window-system-version "it does not give useful information." "24.3")
;; Variables which should trigger redisplay of the current buffer.
;; Variables whose change of value should trigger redisplay of the
;; current buffer.
;; To test whether a given variable needs to be added to this list,
;; write a simple interactive function that changes the variable's
;; value and bind that function to a simple key, like F5. If typing
;; F5 then produces the correct effect, the variable doesn't need
;; to be in this list; otherwise, it does.
(mapc (lambda (var)
(add-variable-watcher var (symbol-function 'set-buffer-redisplay)))
'(line-spacing