Emacs attach an action to any key pressed

Emacs attach an action to any key pressed

[Ivanov Dmitry]

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Suppose, I have the code:

(defun dummy ()
      (interactive)
      (message "aaa"))

(local-set-key (kbd "<left>") 'dummy)

When you click <left> key in the current buffer, it will print "aaa".

Is it possible to attach this action to any key pressed?

I looked into "Format of Keymaps" and "Searching Keymaps" in Emacs info
pages, but found no code examples.

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Re: Emacs attach an action to any key pressed

[Magnar Sveen]

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Sounds like you're looking for the post-command-hook.

- Magnar


On Wed, Jun 5, 2013 at 7:26 AM, Ivanov Dmitry <usr345@gmail.com> wrote:

> Suppose, I have the code:
>
> (defun dummy ()
>       (interactive)
>       (message "aaa"))
>
> (local-set-key (kbd "<left>") 'dummy)
>
> When you click <left> key in the current buffer, it will print "aaa".
>
> Is it possible to attach this action to any key pressed?
>
> I looked into "Format of Keymaps" and "Searching Keymaps" in Emacs info
> pages, but found no code examples.
>

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Re: Emacs attach an action to any key pressed

[Ivanov Dmitry]

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I tried this:

(defun dummy ()
      (interactive)
      (message "aaa")
      (remove-hook 'post-command-hook 'dummy))

(add-hook 'post-command-hook 'dummy)

It prints "aaa" exactly after I press C-x e on add-hook command. But I want
it to print only when I press any key afterwards. What should I do?

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Re: Emacs attach an action to any key pressed

[Stefan Monnier]

> Is it possible to attach this action to any key pressed?

Maybe you're looking for

  (local-set-key [t] 'dummy)


-- Stefan

Re: Emacs attach an action to any key pressed

[Kevin Rodgers]

On 6/5/13 1:56 AM, Ivanov Dmitry wrote:
> I tried this:
>
> (defun dummy ()
>        (interactive)
>        (message "aaa")
>        (remove-hook 'post-command-hook 'dummy))
>
> (add-hook 'post-command-hook 'dummy)
>
> It prints "aaa" exactly after I press C-x e on add-hook command. But I want it
> to print only when I press any key afterwards. What should I do?

(when (read-event "Press any key to continue: ")
   (message "aaa"))

-- 
Kevin Rodgers
Denver, Colorado, USA

Re: Emacs attach an action to any key pressed

[Ivanov Dmitry]

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On Wed, Jun 5, 2013 at 5:02 PM, Stefan Monnier <monnier@iro.umontreal.ca>wrote:

> > Is it possible to attach this action to any key pressed?
>
> Maybe you're looking for
>
>   (local-set-key [t] 'dummy)
>

Yes. It worked great. Thanks.

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