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Re: key-binding values
From: |
Andreas Schwab |
Subject: |
Re: key-binding values |
Date: |
Tue, 06 Sep 2005 18:26:38 +0200 |
User-agent: |
Gnus/5.110003 (No Gnus v0.3) Emacs/22.0.50 (gnu/linux) |
"Drew Adams" <address@hidden> writes:
> Consider these two definitions:
>
> (defcustom my-key [?\C-\ ] "My key sequence.")
> (defcustom my-key "\C- " "My key sequence.")
>
> `C-h v' then gives these values: [67108896] and "^@".
>
> Is this as good as can be expected - is there no way to get something more
> readable for [?\C-\ ]?
(key-description [67108896]) => "C-SPC"
(key-description "\C- ") => "C-@"
> Emacs users learn quickly to read "^@" as "control @", and they also
> learn that this is equivalent to "control SPC", but [67108896] is hard
> to read and digest.
Keys are just integers in Emacs. There is nothing that makes any integer
special wrt to keys.
> Also, correct me if I'm wrong, but my understanding is that the form [?\C- ]
> is generally preferred over the form "\C- ", for a key binding.
These two key sequences represent quite different bindings. You can't get
one override the other, it depends on the terminal which key you receive
on typing C-space.
> If so, that makes matters worse in cases like this.
>
> This form is good:
>
> (defcustom my-key [(control ?\ )] "My key sequence.")
(key-description [(control ?\ )]) => "C-SPC"
Andreas.
--
Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."