Re: refBuilder->get_widget_derived usage

[Markus Kolb <markus kolb+gtkmm tower-net de>]

Am 2015-02-28 10:47, schrieb Markus Kolb:
> Hi,
>
> I'm currently stuck and need your help...
>
> I'd like to "load" a child Box from a glade-file to a derived class.
> But on usage of the ContainerServer* returned by static
> ContainerServer* create(),
> I get a segv:
>
> p_notebook_game->append_page(*p_container_server, _("Server"));
>
> #0  0x00007ffff79f10b3 in Gtk::Notebook::append_page(Gtk::Widget&,
> Gtk::Widget&) () at /usr/lib64/libgtkmm-3.0.so.1
> #1  0x000000000041a2a5 in on_dialog_new_response(int) (response_id=-5)
>     at battleship.cpp:450
> #2  0x00007ffff79bbbc7 in  () at /usr/lib64/libgtkmm-3.0.so.1
[...]
> Needs the refBuilder be available and isn't it possible to hide it?
> So does the *p_cs get deleted when refBuilder gets deleted?
> Or why this doesn't work?
> How to do it? The examples only "load" main-dialogs.


I've changed my create() to a
static ContainerServer* create(const Glib::RefPtr<Gtk::Builder>& 
refBuilder);

Then it works. So my assumption seems to be right.
I think I can live with it.


> class ContainerServer : public Gtk::Box
> {
> public:
>   ContainerServer(BaseObjectType* cobject, const
> Glib::RefPtr<Gtk::Builder>& refBuilder);
>   static ContainerServer* create();
> private:
>   Gtk::TreeView* m_p_treeview;
> } ;
>
> ContainerServer::ContainerServer(BaseObjectType* cobject, const
> Glib::RefPtr<Gtk::Builder>& refBuilder) : Gtk::Box(cobject)
> {
>   refBuilder->get_widget("treeview_server", m_p_treeview);
>   m_p_treeview->get_model();
>   // TODO: liststore stuff
> }
>
> ContainerServer* ContainerServer::create()
> {
>   // Load the GtkBuilder file and instantiate its widgets
>   Glib::RefPtr<Gtk::Builder> refBuilder = Gtk::Builder::create();
>   try
>   {
>
> refBuilder->add_from_file(Glib::build_filename(Configuration::get().get_datadir(),
> "bs_server.glade"));
>   } catch (const Glib::FileError& ex)
>   {
>     g_critical("FileError: %s", ex.what().c_str());
>     return 0;
>   } catch (const Glib::MarkupError& ex)
>   {
>     g_critical("MarkupError: %s", ex.what().c_str());
>     return 0;
>   } catch (const Gtk::BuilderError& ex)
>   {
>     g_critical("BuilderError: %s", ex.what().c_str());
>     return 0;
>   }
>
>   ContainerServer* p_cs = 0;
>   refBuilder->get_widget_derived<ContainerServer>("box_server", p_cs);
>   return p_cs;
> }