Re: Trapping prefixes with universal argument component [solved]T

[Tim Johnson <tim@akwebsoft.com>]

See bottom:

On 8/22/21 12:13 AM, Yuri Khan wrote:
> On Sun, 22 Aug 2021 at 06:30, Emanuel Berg via Users list for the GNU
> Emacs text editor <help-gnu-emacs@gnu.org> wrote:
>
>> Try this then ... should work
>>
>>    (global-set-key [M-kp-0] nil)
> Binding the offending key to nil isn’t going to help because when
> Emacs sees this (lack of) binding it will just proceed to key
> translation. And kp-0 translates to 0 and M-0 is bound to
> universal-argument.
>
> Instead:
>
>      (global-set-key (kbd "<M-kp-0>") 'ignore)
>      (global-set-key (kbd "<M-kp-1>") 'ignore)
>      (global-set-key (kbd "<M-kp-4>") 'ignore)
>      (global-set-key (kbd "<M-kp-6>") 'ignore)
>
> Alternatively:
>
>      (defun my-insert-open-paren ()
>        (interactive)
>        (let ((last-command-event ?\())
>          (call-interactively 'self-insert-command)))
>      (defun my-insert-close-paren ()
>        (interactive)
>        (let ((last-command-event ?\)))
>          (call-interactively 'self-insert-command)))
>      (defun my-insert-equal ()
>        (interactive)
>        (let ((last-command-event ?=))
>          (call-interactively 'self-insert-command)))
>
>      (global-set-key (kbd "<M-kp-0> <M-kp-4> <M-kp-0>") 'my-insert-open-paren)
>      (global-set-key (kbd "<M-kp-0> <M-kp-4> <M-kp-1>") 'my-insert-close-paren)
>      (global-set-key (kbd "<M-kp-0> <M-kp-6> <M-kp-1>") 'my-insert-equal)
Dang Dude! You nailed it. Those assignments all work.
Thanks very much. I'm marking this solved and ripping off the duct tape.

Thanks also to Drew, Emanuel and all else who chimed in.
Good work. :)
>
> (Why not (insert "(")? Because self-insert-command also handles the
> numeric prefix argument, is affected by overwrite-mode, expands
> abbreviations, and does a lot of other things.)
>
>
> The “correct” solution, of course, would be to reprogram the keypad so
> it sends different key codes, such as Shift+9, Shift+0, and = (or
> whatever is appropriate for one’s national keyboard layout), or if the
> device does not allow reprogramming, then harvest key switches and
> build one that does ;) Plenty of macropad kits on the market right
> now, some based on Free firmwares such as TMK or QMK.
This is a mechanical keypad but it is not programmable. I've used xmodmap
a lot in the past but from inspecting xev output, I'm afraid that any 
reassignment
through xmodmap might also effect the keyboard too.
cheers ...

-- 
Tim
tj49.com