From: Stephen Berman <stephen.berman@gmx.net>
To: Heime <heimeborgia@protonmail.com>
Cc: Heime via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org>
Subject: Re: Buttons in help buffer that displays contents of variables
Date: Sun, 23 Jul 2023 00:28:33 +0200 [thread overview]
Message-ID: <874jlvvawe.fsf@gmx.net> (raw)
In-Reply-To: <IvsFg7sy9z-HHdbQ9qDQ7AHJKefqigrf4nBTa2CJX8eIJoGEZnudL35kXqK0tvr1IG5qyxyLSvFzUvV2WXEK6vfl4jYeLfpDPfFbGFa5r38=@protonmail.com> (Heime's message of "Sat, 22 Jul 2023 22:13:25 +0000")
On Sat, 22 Jul 2023 22:13:25 +0000 Heime <heimeborgia@protonmail.com> wrote:
[...]
>> > > > > > The error says the function my-action expects one argument, but you
>> > > > > > defined it with an empty argument list. If you don't want to use the
>> > > > > > argument, you can use `' as a placeholder for the required argument,
>> > > > > > which will be ignored by the byte compiler:
>> > > > > >
>> > > > > > (defun my-action ()
>> > > > > > "Function to be executed when the button is clicked."
>> > > > > > (interactive)
>> > > > > > (message "%s" myvar))
>> > > > > >
>> > > > > > Steve Berman
>> > > > >
>
> Do you know what the single argument is used for ?
This is explained in the Info node `(elisp) Manipulating Buttons':
Where a BUTTON parameter is specified, it means an object referring
to a specific button, either an overlay (for overlay buttons), or a
buffer-position or marker (for text property buttons). Such an object
is passed as the first argument to a button’s invocation function when
it is invoked.
See also the function `button-activate' described in that node.
Steve Berman
next prev parent reply other threads:[~2023-07-22 22:28 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-22 14:40 Buttons in help buffer that displays contents of variables Heime
2023-07-22 19:18 ` Heime
2023-07-22 20:14 ` Stephen Berman
2023-07-22 20:24 ` Heime
2023-07-22 20:48 ` Stephen Berman
2023-07-22 21:24 ` Heime
2023-07-22 21:46 ` Stephen Berman
2023-07-22 22:02 ` Heime
2023-07-22 22:13 ` Heime
2023-07-22 22:28 ` Stephen Berman [this message]
2023-07-22 22:42 ` Heime
2023-07-22 22:50 ` Stephen Berman
2023-07-22 23:13 ` Heime
2023-07-23 7:45 ` Yuri Khan
2023-07-23 19:34 ` Heime
2023-07-23 19:57 ` Yuri Khan
2023-07-23 20:05 ` Heime
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