From: Joe Van Dyk <joevandyk@...>
Date: 2005-05-06T02:30:33+09:00
Subject: Re: Tkmenubar and checkbuttons

On 5/5/05, Hidetoshi NAGAI <nagai@ai.kyutech.ac.jp> wrote:
> From: Joe Van Dyk <joevandyk@gmail.com>
> Subject: Tkmenubar and checkbuttons
> Date: Thu, 5 May 2005 17:10:29 +0900
> Message-ID: <c715e64050505011044a55b21@mail.gmail.com>
> > I have this snippet as part of my Tk menu bar spec:
> >
> >       ['Options',
> >          ['Display Map', proc {show_map()}],
> >          ['Hide Map', proc {hide_map()}]
> >
> > How can I combine those two menu options into a single checkbutton
> > menu option?  The API documentation on it wasn't clear at all.
> 
> Maybe, do you want such like as the following?
> ----------------------------------------------------------
> require 'tk'
> 
> m = nil  # variable to pass the menu object to procedures
> 
> spec = [
>   ['Option',
> 
>     # define a command entry by Hash
>     {
>       :type=>'command',
>       :label=>'Display Map',
>       :command=>proc{
>         show_map()
>         m.entryconfigure('Display Map', :state=>:disabled)
>         m.entryconfigure('Hide Map', :state=>:normal)
>       },
>       :state=>:normal
>     },
> 
>     # define a command entry by Array
>     ['Hide Map',
>       proc{
>         hide_map()
>         m.entryconfigure('Display Map', :state=>:normal)
>         m.entryconfigure('Hide Map', :state=>:disabled)
>       },
>       nil, nil,
>       {:state=>:disabled}
>     ]
>   ]
> ]
> 
> # add menubar and get the cascade menu object
> m = Tk.root.add_menubar(spec).entrycget('Option', :menu)
> 
> Tk.mainloop
> ----------------------------------------------------------
> --
> Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)
> 
> 

Thanks for the example.  That's close to what I originally wanted and
will probably work well enough.

Just to clarify, what I originally wanted was to be able to have a
single menu entry in the menu.  The menu entry should be a check
button with the text "Display Map" next to it.  When the menu checkbox
is activated, it should call #show_map.  When the checkbox is
inactivated, it should call #hide_map.

Thanks,
Joe