Re: Execute a string as a command

[Tim Johnson <tim@akwebsoft.com>]

* Tim Johnson <tim@akwebsoft.com> [151106 07:30]:
> * Joost Kremers <joost.m.kremers@gmail.com> [151106 00:57]:
> > Tim Johnson wrote:
> > > Here is an example of what could be a working function 'interning'
> > > a string :
> > > (defun tj-toggle-funcs ()
> > >   "Toggle functions"
> > >   (interactive)
> > >   (let ((menu
> > > 	 '("" ("" ("Transient Mark Mode" . "transient-mark-mode"))
> > > 	       ("Truncate Lines" . "toggle-truncate-lines")
> > > 	       ("Show Tabs" .  "toggle-tabs-font-lock"))))
> > > 	(choice ))
> > >     (setq choice (tmm-prompt menu))
> > >     (if choice
> > > 	(call-interactively (intern choice)))))
> > >
> > > My preference *would* be that a command object be read from the
> > > 'menu structure, but wasn't able to make it work.	
> > > So my next step is to figure out how to place a command object as a
> > > value instead of a string... and then evaluate it properly.
>   Thanks for the reply :
> 
> > Check out the Elisp manual on pop-up menus, which use the function
> > x-popup-menu, which takes the same kind of menu structure as tmm-prompt.
>  
>    1)I'm a bit "mouse averse" - I.E. I prefer tmm-prompt for
>    numerous reasons.
> 
>    2)The Elisp manual (as far as I have found it) does not give any
>    working examples which have edified me.
> 
>    What has eluded me so far is how to use commands as values in the
>    alist - this is why I introduced the topic of evaluating a string
>    as a command.
> 
> > C-h i Elisp RET Pop-up menus RET
> > 
> > An alternative to what you're trying to do would be to use the hydra
> > package:
> > 
> > https://github.com/abo-abo/hydra
> > 
> > Here is my toggle hydra, for example:
> > 
> > ```
> > (defhydra jk-hydra-toggle (:color blue)
> >   "Change"
> >   ("d" toggle-debug-on-error "Debug")
> >   ("w" writeroom-mode "Writeroom")
> >   ("i" ispell-change-dictionary "Change Ispell Dictionary")
> >   ("f" toggle-fill-unfill "Fill")
> >   ("F" follow-mode "Follow mode")
> >   ("t" orgtbl-mode "OrgTbl mode")
> >   ("y" typo-mode "Typo mode")
> >   ("q" nil "Cancel"))
> > (bind-key "s-r" #'jk-hydra-toggle/body)
> > ```
>   The formatting of this structure above makes total sense, but can
>   it be used for tmm-prompt.
> 
> > Yeah, ok, so `ispell-change-dictionary` is not a toggle... But you get the
> > idea. ;-)
  Oh! I've read further on hydra. Doesn't even need tmm-prompt. It
  looks pretty awesome. I will try it.

  BTW: After a night's sleep and some coffee, I think I have a
  working tmm-prompt solution with command objects:
  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun tj-toggle-funcs ()
  "Toggle functions"
  (interactive)
  (let ((menu
	 '("" ("" ("1)Transient Mark Mode" . (transient-mark-mode))
	       ("2)Truncate Lines" . (toggle-truncate-lines))
	       ("3)Show Tabs" .  (toggle-tabs-font-lock))
	       ("4)Cursor Color" . (tj-cursor-color)))))
	(choice))
    (setq choice (tmm-prompt menu))
    (if choice
	(eval choice))))
  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
cheers
-- 
Tim 
http://www.akwebsoft.com, http://www.tj49.com