`global-set-key' doesn't work in my console

`global-set-key' doesn't work in my console

[Forrest]

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`global-set-key' doesn't work in my console.

i have definitions below in my ~/.emacs:

global-set-key (kbd "C-,")
        '(lambda () "scroll the page down" (interactive) (scroll-down 1)))

(defun up-slightly () (interactive) (scroll-up 1))
(global-set-key [(control .)]          'up-slightly)

then i went to console, launched emacs, opened a file, i can use the
"default" key-bindings like C-x C-c, but when i press C-, or C-. , nothing
happened, they work well in X window, how can i get it work in console?

Thanks a lot!
Forrest

%%
GNU Emacs 23.0.60.1 (i686-pc-linux-gnu, GTK+ Version 2.8.20)
Debian Etch
%%

-- 
Stupid is as stupid does.

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Re: `global-set-key' doesn't work in my console

[Peter Dyballa]

Am 07.01.2008 um 09:03 schrieb Forrest:

> global-set-key (kbd "C-,")
>         '(lambda () "scroll the page down" (interactive) (scroll- 
> down 1)))

The console and other terminal emulations can only produce "key  
events" in the ASCII or extended ASCII range, i.e. 8 bit characters  
(man ascii). Therefore not every time you hold down the control  
"modifier" key and press some other key something with a meaning is  
produced. It's like when you're scribbling on paper: not every  
"picture" is a letter or a digit or worth an exhibition at MOMA ...  
C-, can work X which has its own concept of events that are  
abstracted from ASCII codes.

--
Greetings

   Pete

November, n.:
         The eleventh twelfth of a weariness.
                 – Ambrose Bierce, "The Devil's Dictionary"

RE: `global-set-key' doesn't work in my console

[Drew Adams]

> `global-set-key' doesn't work in my console.
> i have definitions below in my ~/.emacs:
>
> global-set-key (kbd "C-,")
>         '(lambda () "scroll the page down" (interactive) (scroll-down 1)))
> (defun up-slightly () (interactive) (scroll-up 1))
> (global-set-key [(control .)]          'up-slightly)
>
> then i went to console, launched emacs, opened a file, i can use the
> "default" key-bindings like C-x C-c, but when i press C-, or C-. ,
> nothing happened, they work well in X window, how can i get it work
> in console?

I believe the problem is that those particular keys (e.g. C-,) are not
available using a console.

Re: `global-set-key' doesn't work in my console

[Forrest]

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> Mike Mattie writes:
> > On Tue, 8 Jan 2008 15:38:08 +0800
> > Forrest <forrest.yu@gmail.com> wrote:
> >
> > > > > global-set-key (kbd "C-,")
> > > > > '(lambda () "scroll the page down" (interactive) (scroll-
> > > > > down 1)))
> >
> > try a space like this:
> > (kbd "C-c ,")
>
> Have you tried this? It won't work.

i tried, it worked

>
> > If that fixes it try using a function I previously posted that
eliminates
> > the errors from the process of defining keys.
>
> If it were so simple don't you think Emacs would do this?
>
> > (defun insert-key-notation ()
> > "inject a complete \(kbd \"sequence\"\) with key notation for a key
sequence given by prompt"
> > (interactive)
> > (insert "(kbd \"")
> > (insert (format-kbd-macro (read-key-sequence "Key? " nil t)))
> > (insert "\")"))
> >
> > it will define the kbd sexp for you after it prompts you for the key
sequence.
>
> It looks like the reason that it doesn't work has already been explained
but
> Forrest has decided not to accept the answer (or perhaps there is a
> communication problem)...

that's what you think, not what i think

>
> > > > The console and other terminal emulations can only produce "key
> > > > events" in the ASCII or extended ASCII range, i.e. 8 bit characters
> > > > (man ascii). Therefore not every time you hold down the control
> > > > "modifier" key and press some other key something with a meaning is
> > > > produced. It's like when you're scribbling on paper: not every
> > > > "picture" is a letter or a digit or worth an exhibition at MOMA ...
> > > > C-, can work X which has its own concept of events that are
> > > > abstracted from ASCII codes.
> > >
> > > C-x C-c work well in console, so i guess there must be something
> > > wrong with my key-binding settings. and also, emacs was designed in
> > > ages when X was not popular, it's unreasonable that custom
> > > key-binding doesn't work
>
> Do "man ascii". This is 128 character set and 96, or thereabout, are
printing
> characters. If there were a control character counterpart for each one
that
> would result in 192 character set. Presumably control characters only
exist
> for C-@ to C-_ (0 to 32, @ to _ being 64 to 96).

thank you for your patience, however, do you mean that only printing
characters and C-@ to C-_ can be processed by emacs?
then what if you press F1~F12? and Home, End, Del, Ins? and Left, Right, Up,
Down?

96 + (96 - 64) = 128  i hope i had understood you

>
> > > i'm a newbie, could you give me any detailed clue to solve it?
>
> On a normal console, I don't think you can.
>
> --
> Nick http://www.inet.net.nz/~nickrob

Forrest

-- 
Stupid is as stupid does.

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Re: `global-set-key' doesn't work in my console

[Peter Dyballa]

Am 08.01.2008 um 17:32 schrieb Forrest:

> thank you for your patience, however, do you mean that only printing
> characters and C-@ to C-_ can be processed by emacs?

Please don't mix up GNU Emacs and your console!

> then what if you press F1~F12? and Home, End, Del, Ins? and Left,  
> Right, Up,
> Down?

These keys are not producing Control-anything events. Simple proof: C- 
q <your key press>.

--
Greetings

   Pete

There are two major products that come out of Berkeley: LSD and UNIX.  
We don't believe this to be a coincidence.
				- Jeremy S. Anderson

Re: `global-set-key' doesn't work in my console

[Forrest]

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On Jan 9, 2008 3:31 AM, Peter Dyballa <Peter_Dyballa@web.de> wrote:
>
> Am 08.01.2008 um 17:32 schrieb Forrest:
>
>
> > thank you for your patience, however, do you mean that only printing
> > characters and C-@ to C-_ can be processed by emacs?
>
> Please don't mix up GNU Emacs and your console!
>
>
> > then what if you press F1~F12? and Home, End, Del, Ins? and Left,
> > Right, Up,
> > Down?
>
> These keys are not producing Control-anything events. Simple proof: C-
> q <your key press>.
>
> --
> Greetings
>
> Pete
>
> There are two major products that come out of Berkeley: LSD and UNIX.
> We don't believe this to be a coincidence.
> - Jeremy S. Anderson
>
>
>
>

i wrote a program which invokes `getchar()' at startup, then i press `C-,',
nothing happened, while `C-[a~z]' seem ok.
so i think the terminal doesn't pass all of the C-<KeyPress> combinations to
the program, i don't know which ones are chosen, but obviousely `C-,' and
`C-.' are not
i tried to figure out why, then i googled much but got little helpful, it
seems that `terminfo' is the point but i cannot understand what it is, the
output of 'infocmp' is a mess for me :(

i have changed the scrolling key-bindings to `M-n' and `M-p' and they work
good in the console

-- 
Stupid is as stupid does.

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Re: `global-set-key' doesn't work in my console

[Peter Dyballa]

Am 09.01.2008 um 10:48 schrieb Forrest:

> i tried to figure out why, then i googled much but got little  
> helpful, it
> seems that `terminfo' is the point but i cannot understand what it  
> is, the
> output of 'infocmp' is a mess for me :(

It's not that. It's ASCII:

	C-@ -> \000 or NUL
	C-a -> \001
	C-b -> \002
	...
	C-z -> \032
	C-[ -> \033
	C-\ -> \034
	C-] -> \035
	C-^ -> \036
	C-_ -> \037
	SPC -> \040

This has nothing to do with terminfo. The latter is for drawing and  
moving the cursor on an alpha-numeric text screen.

--
Greetings

   Pete

It isn't pollution that's harming the environment. It's the  
impurities in our air and water that are doing it.

Re: `global-set-key' doesn't work in my console

[Forrest Y. Yu]

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On Jan 10, 2008 8:51 PM, Peter Dyballa < Peter_Dyballa@web.de> wrote:
>
> Am 09.01.2008 um 10:48 schrieb Forrest:
>
>
> > i tried to figure out why, then i googled much but got little
> > helpful, it
> > seems that `terminfo' is the point but i cannot understand what it
> > is, the
> > output of 'infocmp' is a mess for me :(
>
> It's not that. It's ASCII:
>
> C-@ -> \000 or NUL
> C-a -> \001
> C-b -> \002
> ...
> C-z -> \032
> C-[ -> \033
> C-\ -> \034
> C-] -> \035
> C-^ -> \036
> C-_ -> \037
> SPC -> \040
>
> This has nothing to do with terminfo. The latter is for drawing and
> moving the cursor on an alpha-numeric text screen.
>
> --
> Greetings
>
> Pete
>
> It isn't pollution that's harming the environment. It's the
> impurities in our air and water that are doing it.
>
>
>
>


Thank you very much Pete! I think I've got it.

1. It's the keyboard driver that ignores key-combinations like `C-,'
(mentioned by Andreas). When I press `C-,', the keyboard driver received it
and does nothing, so the terminal doesn't even know I've press keys. That's
why emacs cannot accept `C-,' ---- emacs doesn't even know the key-press
action!
2. The keyboard driver gives an ASCII code to any `Ctrl-' thing it thinks
reasonable. The code is actually "stolen" from the ASCII table. Because the
Char 0~32 will never be generated by a keyboard, they can be used for any
purpose the driver wants. That's why Pete and Nick asked me to see `man
ascii'.
3. When a key like F1~F12 or HOME, END are pressed, a key sequence begins
with a ESC(27) will be passed to the terminal, and probably be passed on to
emacs.
4. I guess that the keyboard driver used in an X is different with that used
in a console. The former passed each key-press to a program, but not ignore
combinations like `C-,'. Thus emacs in an X can receive every press of mine.

Again, a lot of thanks to Pete, and Nick, and Andreas, and everyone who
helped me in this question. I just reviewed all the messages I received. I
didn't understand what I've read because I took it for granted that the
keyboard driver will pass everything to the terminal.

Best Regards,
Forrest Y. Yu


-- 
Stupid is as stupid does.

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