how to modify ido-mode keymaps
reddit / emacs

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rzksobhy27 · 2022-04-30 12:45

I want to modify ido-mode keymaps i want to bind tab and shift-tab for
navigation

​

this is my first day in Emacs btw but I'm already falling in love with
it

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phundrak · 2022-04-30 13:15

`define-key` should get you covered. Its first argument is the keymap
you want to assign a keybind to, the second one is the keybind itself,
and the third is the function to assign to said keybind. For instance,
to have `C-a` ignored in `ido-completion-map`, you would use `(define-
key 'ido-completion-map (kbd "C-a") #'ignore)`.

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rzksobhy27 · 2022-04-30 13:29

I tried this but it's not working

(define-key ido-completion-map (kbd "TAB") 'ido-next-match)

(define-key ido-completion-map (kbd "backtab") 'ido-prev-match)

​

tab stills open a window of possible completions and shift tab says
undifined

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phundrak · 2022-04-30 13:34

`backtab` is not a proper key name, what you want is `S-TAB`.

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rzksobhy27 · 2022-04-30 13:47

ok but they both are not working

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phundrak · 2022-04-30 13:48

Did you evaluate both expressions?

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rzksobhy27 · 2022-04-30 14:01

yes C-M-x right ?

amd after I restart emacs it gives me an error

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00-11 · 2022-04-30 15:48

`(define-key ido-completion-map (kbd "<backtab>") 'ido-prev-match)`

or

`(define-key ido-completion-map [backtab] 'ido-prev-match)`

You have to give `kbd` the same format of a key name that Emacs itself
uses (in `*Help*`) to talk about the key.

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rzksobhy27 · 2022-04-30 17:14

all the docs said the same but I get this error for some reason

Wrong type argument: keymapp, nil

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00-11 · 2022-04-30 19:04

That's your answer - you didn't tell us about that error message.

The value of `ido-completion-map` isn't a keymap. That's what the
error msg is telling you. Did you create such a keymap and assign it
to that var? Or did you load some library that does that? At least the
variable is bound (to `nil`), so something has defined it, but not set
its value to a keymap.

Note that this error is entirely different from what you said the
problem was before:

> tab stills open a window of possible completions and shift tab says
undifined

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rzksobhy27 · 2022-04-30 19:47

what I just typed in my config (ido-mode 1)

about the problem I said before sorry I was evaluating the conffig
with C-M-x this is my first day with emacs