Re: Failure to add radio buttons to popup menu.

On 2020-12-09 08:55, Kjell Ahlstedt wrote:
>
> Gtkmm supports glade, if gtk supports glade. Gtkmm just wraps gtk's C 
> functions in C++ code. The glade file with a GtkDialog that you 
> mention should be no problem for gtkmm. It's similar to the 
> https://gitlab.gnome.org/GNOME/gtkmm-documentation/-/tree/gtkmm-3-24/examples/book/builder/basic 
> example.
>
> A glade file with GtkRadioMenuItem can probably also be used. If I had 
> realized from the beginning that you're not interested in the kind of 
> solution I gave you, I might have managed to get something working 
> without touching the ui_info string. There is a limit to how much time 
> I want to spend trying to answer your questions. That's a drawback 
> with free open source code: When you get stuck, no one is responsible 
> for answering your questions.
>
GtkRadioMenuItem can't be used together with GAction and GSimpleAction, 
and therefore it can't be used together with Gio::Action, 
Gio::SimpleAction, Gio::SimpleActionGroup. I had a look at gtk's source 
code and made some tests. When I replaced GtkRadioMenuItem by 
GtkCheckMenuItem, the signal handler was called, but of course the menu 
items didn't act as connected in a radio item group. GtkRadioMenuItems 
will perhaps work with the deprecated Gtk::RadioAction and Gtk::ActionGroup.

See also the gtk issue https://gitlab.gnome.org/GNOME/gtk/-/issues/2552

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