Re: How to use Gio::DBus::Connection::signal_subscribe?

[Nicolas Jäger <jagernicolas legtux org>]

Hi
 
> I am doing C++, but that function in the C++ API is obviously based on
> the C API function... Well, the implementation is:
>
>   return g_dbus_connection_signal_subscribe(gobj(), sender.c_str(),
>     interface_name.c_str(), member.c_str(), object_path.c_str(), arg0.c_str(),
>     static_cast<GDBusSignalFlags>(flags),
>     &DBusConnection_Signal_giomm_callback, slot_copy,
>     &DBusConnection_Signal_giomm_callback_destroy);
>
> And, of course, the documentation of the C++ API is also based on the
> documentation of the C API (except that NULL has been replaced with
> 0). But the problem is that sender.c_str() can never be NULL (but
> that's what I would need to achieve).

I try to help. what I wanted to point, is in general you can't just do that... I got some issue few
weeks ago because doing that... (not in gtkmm). But ok if you check the implementation, fine.

could you try to do something like this :

  Glib::ustring *sender = 0; // or nullptr

  ...->signal_subscribe( ..., *sender, ... );


regards,
nicolas