On Mon, Mar 12, 2007 at 10:26:15PM +0800, Kuang-Chun Cheng wrote: > I'm recently study GObject and hope someone can explain > the difference between > > Abstract class defined by G_DEFINE_ABSTRACT_TYPE > and interface. > > I think if I use G_DEFINE_ABSTRACT_TYPE to create a > class and define all member functions pointer to NULL (pure > virtual) without implementation, then I will have an interface. It could work this way in an object system that uses multiple inheritance + purely abstract classes to express interfaces (in the general sense), but GObject does not permit multiple inheritance. > So why GType introduce a new type called INTERFACE. > What kind of new features are introduced in GType's interface ? A GObject class can implement any number of interfaces. However, it has exactly one parent class. Yeti _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
