Re: Buttons in help buffer that displays contents of variables

[Heime]

------- Original Message -------
On Monday, July 24th, 2023 at 7:57 AM, Yuri Khan <yuri.v.khan@gmail.com> wrote:


> On Mon, 24 Jul 2023 at 02:34, Heime heimeborgia@protonmail.com wrote:
> 
> > Does the function associated with the button be restricted to a single 
> > argument,
> > meaning that users cannot pass any additional data to it ?
> 
> 
> Passing the button is sufficiently general. An action can reach into
> the button’s properties and/or use the button’s identity or one of its
> properties to look up in an external alist. And, of course, you can
> always create lexical closures over a multi-argument function,
> adapting it to the action interface.

Are the things you describe done often with buttons in emacs source code ?