Re: how to add button to emacs that play a elisp code

["Pascal J. Bourguignon" <pjb@informatimago.com>]

Renato Pontefice <renato.pontefice@gmail.com> writes:

> Hi,
> is it possible to add a button on my emacs that run a piece of code?
> Or a combination of button.
>
> I mean: I want to run a little elisp procedure, while I'm editing a file.

So you've seen global-set-key to configure a key or combination of keys
(key chord) to call up an elisp command.

But you can also insert buttons in buffers to run some elisp code:

(let ((start (point)))
  (insert "Hello")
  (let ((end (point)))
    (make-button start end 'action (lambda (&rest args) (message "world!")))))

When you evaluate this expression, it inserts the text Hello as a
button.  If you move to this button and type RET, or middle-click on it,
then the action function is called, which in this case will display
world! in the minibuffer.

-- 
__Pascal Bourguignon__                 http://www.informatimago.com/
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