* Help requirements for setting buffer-read-only to nil
@ 2023-09-10 20:15 Heime
0 siblings, 0 replies; only message in thread
From: Heime @ 2023-09-10 20:15 UTC (permalink / raw)
To: Heime via Users list for the GNU Emacs text editor
Because a help buffer is always read-only, one has to change buffer-read-only to nil.
But consider the two functions below. maces1 should be the appropriate implementation
because it set buffer-read-only to nil twice. One for the function maces1 and the other
for the defined lambda function.
Yet, the version maces2 does not give any errors if I only retain (setq buffer-read-only nil)
only inside the lambda function. Why is this so ? Shouldn't one change buffer-read-only to nil
twice ?
(defun maces1 ()
"Prints information about frames."
(interactive)
(with-help-window (help-buffer)
(setq buffer-read-only nil)
(insert-button "[1]" 'action
(lambda (button)
(setq buffer-read-only nil)
(insert "> Graphic Organisation \n\n")
(setq buffer-read-only t)))
(insert " Graphic Organisation")
(setq buffer-read-only nil)))
;;-------------
(defun maces2 ()
"Prints information about frames."
(interactive)
(with-help-window (help-buffer)
(insert-button "[1]" 'action
(lambda (button)
(setq buffer-read-only nil)
(insert "> Graphic Organisation \n\n")
(setq buffer-read-only t)))
(insert " Graphic Organisation") ))
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2023-09-10 20:15 Help requirements for setting buffer-read-only to nil Heime
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