live programming

live programming

[moueza]

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Usually, we modify .emacs files  for example to load a new color of
scroll-bar at the start of emacs.
But is it possible to change this color in real time when it is already
loaded, with a script in command-line of term.

Because I want it to change color in including it in a watch -n60 command :
so it should talk with the program emacs.

We can already do scripts but in command line of emacs to load lisp lines ,
not in Xterm or Konsole,I think.
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RE: live programming

[Drew Adams]

> Usually, we modify .emacs files for example to load a new color of
> scroll-bar at the start of emacs. But is it possible to change this
> color in real time when it is already loaded...

I believe you can just `M-x customize-face scroll-bar RET', at least in
Emacs 22. Or use `M-x modify-face scroll-bar RET' or call `modify-face' or
`set-face-attribute' from Emacs-Lisp code.

RE: live programming

[moueza]

Yes , but with M-x , it implies to load it manually.But I want an automatic
periodically change of colors.





Drew Adams wrote:
> 
>> Usually, we modify .emacs files for example to load a new color of
>> scroll-bar at the start of emacs. But is it possible to change this
>> color in real time when it is already loaded...
> 
> I believe you can just `M-x customize-face scroll-bar RET', at least in
> Emacs 22. Or use `M-x modify-face scroll-bar RET' or call `modify-face' or
> `set-face-attribute' from Emacs-Lisp code.
> 
> 
> 
> _______________________________________________
> Emacs-devel mailing list
> Emacs-devel@gnu.org
> http://lists.gnu.org/mailman/listinfo/emacs-devel
> 
> 

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RE: live programming

[Drew Adams]

> >> Usually, we modify .emacs files for example to load a new color of
> >> scroll-bar at the start of emacs. But is it possible to change this
> >> color in real time when it is already loaded...
> >
> > I believe you can just `M-x customize-face scroll-bar RET', at least in
> > Emacs 22. Or use `M-x modify-face scroll-bar RET' or call
> > `modify-face' or `set-face-attribute' from Emacs-Lisp code.
>
> Yes , but with M-x , it implies to load it manually.But I want an
> automatic periodically change of colors.

Sorry, I guess I didn't understand what you're asking. Please try again.

You mentioned "real-time", so I thought you wanted to change the color
interactively. Do you want to change it by Emacs-Lisp at runtime? If so, you
can use modify-face or set-face-attribute from Lisp, then save the change
using a custom function.

Check cus-edit.el to see if there is a function to save a changed face. I
don't see a `customize-save-face', however, so perhaps you'll have to write
one, using `customize-save-variable' as inspiration. In some of my code, I
do what I think you want this way:

  ;; change the background
  (if (fboundp 'set-face-attribute) ; Not available in Emacs 20
      (set-face-attribute face nil ':background new-background)
    (modify-face face nil new-background nil nil nil nil))
  ;; save the change
  (put face 'customized-face
            (list (list 't (list ':background new-background)))))
  (put face 'face-modified nil)

FYI - This is in my library doremi-frm.el:
http://www.emacswiki.org/cgi-bin/wiki/doremi-frm.el (code) and
http://www.emacswiki.org/cgi-bin/wiki/DoReMi (doc).

Perhaps someone else has a better suggestion. I'm moving this to the proper
list, help-gnu-emacs; please remove emacs-devel from the cc of any replies.