Re: Using glade and Actions

[Kjell Ahlstedt <kjell ahlstedt bredband net>]

2012-05-11 17:37, g4hx skrev:
> On 05/11/2012 04:08 PM, Kjell Ahlstedt wrote:
> > Haven't you noticed the Gtk::Builder::get_object() method?
> >
> > Its documentation says "Note that this function does not increment the
> > reference count of the returned object." That's wrong. That sentence is
> > there just because the documentation is copied from the documentation of
> > gtk_builder_get_object().
> >
> > Kjell
> >
> > 2012-05-10 23:47, g4hx skrev:
> > > Hello everyone,
> > >
> > > unfortunately, I have a new problem with gtk3mmm: I have some
> > > Actions/ActionGroups created using glade. Now I want to connect the
> > > on_activate() signal of a certain Action to a member function of my
> > > class. To this end, I need to get a reference to this Action from the
> > > Builder. However, the Builder only has a get_widget method, which fails
> > > with:
> > >
> > > "gtkmm: object `ActZoomIn' (type=`gtkmm__GtkActionGroup') (in GtkBuilder
> > > file) is not a widget type."
> > >
> > > My question is how to obtain the Action form the Builder or else how to
> > > rewrite the code or modify the glade file to connect the Action's
> > > method. Btw I also need a reference to an ActionGroup to call its
> > > set_sensitive method, so glade's handler functions alone won't be
> > > sufficient for me.
> > >
> > > g4hx
> > > _______________________________________________
> Well, reference counters aside, I would much appreciate a (preferably
> type-safe) way to obtain either a pointer or a Glib::RefPtr to the
> Gtk::Action. The get_object is not template-based and returns a
> GLib::RefPtr<Glib::Object>  and I don't know how to convert this to a
> Gtk::Action* or GLib::RefPtr<Gtk::Action>.
> If Gtk::Actions and Gtk::ActionGroups are available in glade, they
> should be usable from the underlying code. Could anyone please point me
> in the right direction here? I have already looked through many of the
> links to programs using gtk3mm, but so far I have found nothing.
>
> g4hx
Glib::RefPtr<Glib::Object> refObjAction = refBuilder->get_object("action1");
Glib::RefPtr<Gtk::Action> refAction = 
Glib::RefPtr<Gtk::Action>::cast_dynamic(refObjAction);
if (!refAction)
{
  //??????? Error
}