X11 bindings and shell bindings

X11 bindings and shell bindings

[Ishan Arora]

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Hi,

Is there a procedure to get mouse position. And is there a procedure to
synchronously run a shell code and return the output as a String. Thanks.

Regards,
Ishan

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Re: X11 bindings and shell bindings

[Jon Wilson]

Hi Ishan,
  * There are guile bindings for gtk and for gnome; I don't know of any 
other X11 bindings.

  * Try (system "ls -l").  Look it up in the POSIX section in the manual.
Regards,
Jon

Ishan Arora wrote:
> Hi,
> 
> Is there a procedure to get mouse position. And is there a procedure to 
> synchronously run a shell code and return the output as a String. Thanks.
> 
> Regards,
> Ishan

Re: X11 bindings and shell bindings

[Ishan Arora]

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Hi,

Thanks for the reply. I tried system. It calls the code synchronously, and
returns a number for success or failure of the command. Is there a way such
that the stdout output of the command is returned as a string? Thanks again.

Regards,
Ishan

On Thu, Sep 18, 2008 at 7:22 PM, Jon Wilson <jsw@wilsonjc.us> wrote:

> Hi Ishan,
>  * There are guile bindings for gtk and for gnome; I don't know of any
> other X11 bindings.
>
>  * Try (system "ls -l").  Look it up in the POSIX section in the manual.
> Regards,
> Jon
>
>
> Ishan Arora wrote:
>
>> Hi,
>>
>> Is there a procedure to get mouse position. And is there a procedure to
>> synchronously run a shell code and return the output as a String. Thanks.
>>
>> Regards,
>> Ishan
>>
>
>

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Re: X11 bindings and shell bindings

[dsmich]

---- Ishan Arora <ishanarora@gmail.com> wrote: 
> Hi,
> 
> Thanks for the reply. I tried system. It calls the code synchronously, and
> returns a number for success or failure of the command. Is there a way such
> that the stdout output of the command is returned as a string? Thanks again.

Try open-input-pipe in the (ice-9 popen) module.

http://www.gnu.org/software/guile/manual/html_node/Pipes.html

-Dale

Re: X11 bindings and shell bindings

[Kjetil S. Matheussen]

"Ishan Arora":
> And is there a procedure to
> synchronously run a shell code and return the output as a String. Thanks.
> 

Should do:

(use-modules (ice-9 rdelim))

(define (get-system-output command)
  (let ((logfilename (tmpnam)))
    (system (string-append command " > " logfilename))
    (let* ((ret "")
	   (fd (open-file logfilename "r"))
	   (line (read-line fd)))
      (while (not (eof-object? line))
	     (set! ret (string-append ret line))
	     (set! line (read-line fd)))
      (close fd)
      (system (string-append "rm " logfilename))
      ret)))

Re: X11 bindings and shell bindings

[Neil Jerram]

2008/9/18  <dsmich@roadrunner.com>:
> ---- Ishan Arora <ishanarora@gmail.com> wrote:
>> Hi,
>>
>> Thanks for the reply. I tried system. It calls the code synchronously, and
>> returns a number for success or failure of the command. Is there a way such
>> that the stdout output of the command is returned as a string? Thanks again.
>
> Try open-input-pipe in the (ice-9 popen) module.

That is indeed the best way, with an up to date Guile.  In case you're
stuck with an old one (1.6.x, I think) where open-input-pipe isn't
reliable, you can work around that by doing something like this:

      (system "your-command-here > temp-file.txt")
      (with-input-from-file "temp-file.txt" read-line)

  Neil

Re: X11 bindings and shell bindings

[JonWilson]

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Oh right.  My apologies for not answering the question you asked...

Ishan Arora wrote:
> Hi,
> 
> Thanks for the reply. I tried system. It calls the code synchronously, and
> returns a number for success or failure of the command. Is there a way such
> that the stdout output of the command is returned as a string? Thanks again.
> 
> Regards,
> Ishan
> 
> On Thu, Sep 18, 2008 at 7:22 PM, Jon Wilson <jsw@wilsonjc.us> wrote:
> 
>> Hi Ishan,
>>  * There are guile bindings for gtk and for gnome; I don't know of any
>> other X11 bindings.
>>
>>  * Try (system "ls -l").  Look it up in the POSIX section in the manual.
>> Regards,
>> Jon
>>
>>
>> Ishan Arora wrote:
>>
>>> Hi,
>>>
>>> Is there a procedure to get mouse position. And is there a procedure to
>>> synchronously run a shell code and return the output as a String. Thanks.
>>>
>>> Regards,
>>> Ishan
>>>
>>
> 

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Re: X11 bindings and shell bindings

[Paul Emsley]

Ishan Arora wrote:
> Hi,
>
> Is there a procedure to get mouse position.
I guess there may be a way via X11, but it is not clear to me.  What you 
might want to be doing is knowing the coordinates of a click in a 
canvas, which is not the same thing (and easier).


> And is there a procedure to synchronously run a shell code and return 
> the output as a String. Thanks.
;; code from thi <ttn at mingle.glug.org>
;;
;; run command and put the output into a string and return
;; it. (c.f. @code{run-command/strings})
(define (shell-command-to-string cmd)
  (with-output-to-string
    (lambda ()
      (let ((in-port (open-input-pipe cmd)))
    (let loop ((line (read-line in-port 'concat)))
      (or (eof-object? line)
          (begin
        (display line)
        (loop (read-line in-port 'concat)))))))))


Paul.

Re: X11 bindings and shell bindings

[Andy Wingo]

On Thu 18 Sep 2008 14:38, "Ishan Arora" <ishanarora@gmail.com> writes:

> Is there a procedure to get mouse position.

No, but it's relatively easy to write a minimal set of Xlib bindings,
binding only the functions you need. Griddy has some bindings:

  bzr get http://wingolog.org/bzr/griddy

Andy
-- 
http://wingolog.org/

Re: X11 bindings and shell bindings

[Linas Vepstas]

2008/9/18 Andy Wingo <wingo@pobox.com>:
> On Thu 18 Sep 2008 14:38, "Ishan Arora" <ishanarora@gmail.com> writes:
>
>> Is there a procedure to get mouse position.
>
> No, but it's relatively easy to write a minimal set of Xlib bindings,
> binding only the functions you need. Griddy has some bindings:

Its nuts to work with X11 directly. Its not meant for that ...
its like trying to call the linux kernel directly using syscalls
and assembly language, bypassing the C library.

Among other things, X11 will give you coords relative to the
upper left of the screen, which is almost surely not what
you want -- you want coords relative to a window, the
window in which your app will be drawing.

Use gtk or gnome or kde. Open a canvas. You can get
coords that way.

--linas

Re: X11 bindings and shell bindings

[Andy Wingo]

Hello!

On Thu 18 Sep 2008 21:37, "Linas Vepstas" <linasvepstas@gmail.com> writes:

> 2008/9/18 Andy Wingo <wingo@pobox.com>:
>> On Thu 18 Sep 2008 14:38, "Ishan Arora" <ishanarora@gmail.com> writes:
>>
>>> Is there a procedure to get mouse position.
>>
>> No, but it's relatively easy to write a minimal set of Xlib bindings,
>> binding only the functions you need. Griddy has some bindings:
>
> Its nuts to work with X11 directly. Its not meant for that ...

You might be right in certain cases. However there are cases in which
you need X, and Griddy is a window manager... Suffice it to say I've had
to learn much more about X than I ever wanted to ;)

Dunno what the OP wants to do tho.

Cheers,

Andy
-- 
http://wingolog.org/