Re: create large menu on the fly

[Andreas Röhler]

Am 06.06.2013 23:36, schrieb daniel:
> hi
>
> I want to create a menu that maps a directory in the filesystem
> recursively.  The files would placed as menu itens and the directories as
> submenus.
>
> But it is a big overhead to create the complete menu in one time.
>
> So the solution would be to populate each menu only when it is activated.
> Any idea how to do this?

From a first entry call your Build-function.
When created, pass it to the mode-map, i.e. redefine mode-map. Reload mode. 
Extended menu should appear.
And so on.

Below an example how to create a menu entry from a single known command in 
python-mode.el.

(defun emen (&optional symbol)
  "Provide menu draft. "
  (interactive "*")
  (let* ((erg (or symbol (car kill-ring)))
         (name (intern-soft erg))
         (doku (if (functionp name)
                   (documentation name)
                 (documentation-property name 'variable-documentation))))
    (switch-to-buffer (current-buffer))
    (save-excursion
      (insert (concat "\n\[\"" (replace-regexp-in-string "-" " " (replace-regexp-in-string "py-" "" 
erg)) "\" " erg "
 :help \" `" erg "'
\n"))
      (when doku (insert (regexp-quote doku)))

      (insert (concat
               ". \"]\n")))
    (skip-chars-forward "[[:punct:]]")
    (capitalize-word 1)))


HTH,

Andreas