Re: Functions behaving according to button presses

[Jean Louis]

* Heime <heimeborgia@protonmail.com> [2023-08-28 21:13]:
> 
> Have noticed that I can have a function like this, which I can
> use with elisp code, using for example 
> 
>  (insert-button "[Next]" 'action 'action-snapshot 'follow-link t)
> 
> The above will also work with any button property name like "[Next]".
> Alternatively I can execute only the "[B5]" part using
> 
> (insert-button "[B5]" 'action 'action-snapshot 'follow-link t)
> 
> Or call it interactively with 'M-x action-snapshot'.  In such case,
> the function would execute '(insert "that")'.
> 
> (defun action-snapshot (&optional button)
> 
>   (pcase (button-label button)
>     ("[B5]"
>         (insert "this"))
>     (_ 
>         (insert "that"))))
> 
> Is the aforementioned description correct.  Is there anything else, 
> alternative
> ways of using function that react according to button clicks ?

I understand you wish to have function that recognize the button label
and act accordingly.

(rcd-button-insert "CLICK ME" 'action-function)CLICK ME ➜ nil

(defun action-function (&optional button)
  (message "%s" (button-label button)))

The above worked for me.

(rcd-button-insert "CLICK ME" 'action-function)CLICK ME ➜ nil
(rcd-button-insert "CLICK ME HARD" 'action-function)CLICK ME HARD ➜ nil

(defun action-function (&optional button)
  (cond ((and button (string= (button-label button) "CLICK ME")) (message 
"Clicked me"))
        ((and button (string= (button-label button) "CLICK ME HARD")) (message 
"Clicked me hard"))))

action-function
Clicked me [2 times]
Clicked me hard
Auto-saving...done

I see it works, you can have function that acts different according to 
(button-label) results.

-- 
Jean

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