Gio::SimpleActionGroup belongs to glibmm, not to
gtkmm. Both gtkmm 2.x and gtkmm 3.x use glibmm versions from the
glibmm-2.4 ABI series. I don't understand how you can do what
you say you do in gtkmm 2.x. Haven't you used Gtk::ActionGroup
and Gtk::Action? Something like
Glib::RefPtr<Gtk::ActionGroup>
m_refActionGroup;
...
m_refActionGroup->get_action("PlacepieceBlackPawn")->set_sensitive(row
!= 0 && row != 7);
Gtk::ActionGroup and Gtk::Action are deprecated in gtkmm 3.x and removed in gtkmm 4.x.
How do you add the Gio::SimpleAction to the Gio::SimpleActionGroup? I suppose you have a
Glib::RefPtr<Gio::SimpleAction> refPlacepieceBlackPawn = ......
or a
m_refActionGroup->add_action("PlacepieceBlackPawn");
that returns a Glib::RefPtr<Gio::SimpleAction>.
Then it would be easy to save that Glib::RefPtr<Gio::SimpleAction>, so you don't need lookup_action().
If you prefer lookup_action(), this should work in gtkmm 3.x, but not in gtkmm 4.x:
auto simple_action = Glib::RefPtr::cast_dynamic<Gio::SimpleAction>(m_refActionGroup->lookup_action("PlacepieceBlackPawn"));
if (simple_action)
simple_action->set_enabled(row != 0 && row != 7);
In gtkmm 2.x I had,
Glib::RefPtr<Gio::SimpleActionGroup> m_refActionGroup;
...
m_refActionGroup->get_action("PlacepieceBlackPawn").set_sensitive(row != 0 && row != 7);
With gtkmm 3.x it seems that I am forced to do:
static_cast<Gio::SimpleAction*>(m_refActionGroup->lookup_action("PlacepieceBlackPawn").get())->set_enabled(row != 0 && row != 7);
Any other attempt (that would look at lot more sane and logical) gives a compile
error in a gtkmm header - or maybe I'm missing something?
The most logical thing would be for 'Gio::SimpleActionGroup::lookup_action' to return
a Glib::RefPtr<Gio::SimpleAction>, in which case I could do just:
m_refActionGroup->lookup_action("PlacepieceBlackPawn")->set_enabled(row != 0 && row != 7);
The builtin cast of Glib::RefPtr isn't working, aka
Glib::RefPtr<Gio::SimpleAction> action = ""
Neither is,
static_cast<Glib::RefPtr<Gio::SimpleAction>>(m_refActionGroup->lookup_action("PlacepieceBlackPawn"))->set_enabled(row != 0 && row != 7);
How am I supposed to get my Gio::SimpleAction back?
Carlo
PS lookup_action return a Gio::Action, which is a base class and doesn't have the set_enabled method.
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