Menu throws a critical message when closing app

[David Gasa i Castell <dgasacas7 gmail com>]

Hi,

In closing the attached application, using the menu path: Client | Quit, I get the critical message

Gtk-CRITICAL **: gtk_tristate_accessible_value_get: assertion ‘value->value_class == &GTK_TRISTATE_ACCESSIBLE_VALUE’ failed

What I’m doing wrong ?

(Note: I'm using Gtkmm-4.0)

--- code

#include <gtkmm.h>

class Window
:
public Gtk::Window
{
public:

Window()
:
vbox (Gtk::Orientation::VERTICAL, 0),

refBuilder (Gtk::Builder::create()),
refSimpleActionGroup (Gio::SimpleActionGroup::create())
{
set_title ("Hello");

set_default_size (200, 200);

refSimpleActionGroup->add_action_bool ("done");

refSimpleActionGroup->add_action ("quit",
sigc::mem_fun (*this, &Gtk::Widget::hide));

insert_action_group ("menu", refSimpleActionGroup);

try
{
refBuilder->add_from_string (get_menu_info());
}
catch (...)
{}

Glib::RefPtr<Gio::Menu> gmenu =
std::dynamic_pointer_cast<Gio::Menu> (refBuilder->get_object ("menubar"));

if (gmenu)
{
auto menubar = Gtk::make_managed<Gtk::PopoverMenuBar>(gmenu);
menubar->set_margin (5);

vbox.append (*menubar);
}

set_child (vbox);
}

private:

Glib::ustring get_menu_info() const
{
return
"<interface>"
"  <menu id='menubar'>"
"    <submenu>"
"      <attribute name='label' translatable='yes'>Client</attribute>"
"      <section>"
"        <item>"
"          <attribute name='label' translatable='yes'>Done</attribute>"
"          <attribute name='action'>menu.done</attribute>"
"        </item>"
"      </section>"
"      <section>"
"        <item>"
"          <attribute name='label' translatable='yes'>Quit</attribute>"
"          <attribute name='action'>menu.quit</attribute>"
"        </item>"
"      </section>"
"    </submenu>"
"  </menu>"
"</interface>";
}

Gtk::Box vbox;

Glib::RefPtr<Gtk::Builder> refBuilder;
Glib::RefPtr<Gio::SimpleActionGroup> refSimpleActionGroup;
};

int main (int argc, char *argv[])
{
Glib::RefPtr<Gtk::Application> app = Gtk::Application::create ("org.hello");
return app->make_window_and_run<Window>(argc, argv);
}

--

David Gasa i Castell

Linux User #488832