mailing-list for TeXmacs Users

[Henri Lesourd <address@hidden>]

Andrea Gamba wrote:

> That's very nice!
>
> Can you possibly explain how to perform a much simpler task, binding Ctrl-+ 
> and
> Ctrl-- to decrease/increase the shrinking ratio? 
>
>  
It's easy to find this by yourself: the following recursive grep
into the TeXmacs codebase:

/home/henri/TeXmacs/TeXmacs/src>grep -R 'Shrin' *|grep scm
TeXmacs/progs/texmacs/menus/preferences-menu.scm:       (enum 
("Shrinking factor" "shrinking factor")
TeXmacs/progs/texmacs/menus/view-menu.scm:  (-> "Shrinking factor"
TeXmacs/progs/texmacs/texmacs/tm-view.scm:  (:argument s "Shrinking factor")
/home/henri/TeXmacs/TeXmacs/src>

, then having a look inside view-menu.scm, you find:

(menu-bind view-menu
 ("Open new window" (open-window))
 .................................
 ("Presentation mode" (toggle-full-screen-mode))
 (-> "Shrinking factor"
     ("1" (set-shrinking-factor 1))
     ................................
     ("10" (set-shrinking-factor 10))
     ---
     ("Other" (interactive other-shrinking-factor))))

=> thus, the function to use to set the shrinking factor
  is: (set-shrinking-factor <VALUE>)


Now, to do what you want, use this function inside the (kbd-map)s
of Christophe's program, and then you are done (inside the '+' handler,
you should increment the shrinking factor, and inside the '-' handler,
you should decrease it. I let the rest as an exercise in Scheme
programming for you. It also turns out that the function to read
the current shrinking factor is (get-shrinking-factor)).

Have fun !


> It would be also nice that the window is always centered when zooming in/out.
> Now it is aligned to the left, do you think it is possible to change this
> setting?
>
>  
No, there are no Scheme commands to change the alignment
of the displayed text inside the window (nor to move or
resize the TeXmacs window, btw).


Best, Henri