On Tue, 2007-06-26 at 16:04 +0100, Emmanuele Bassi wrote: > hi; > > I assume you're referring to the C bindings for GObject. > > On Tue, 2007-06-26 at 20:11 +0530, Gautam Ravi wrote: > > > I dont know whether this is the right place to ask this question, I > > could not find any other list. Please excuse ;-) > > > > I have two things to ask, > > > > 1. Is it possible to create singleton objects in GObjects ? > > yes, there are two methods. > > 1. you provide a foo_object_new() function and store the pointer > g_object_new() returns inside a static variable, and for any > subsequent call you return that pointer; > 2. you override the GObjectClass::constructor() vfunc and you > store the pointer of the new instance there, returning the > same instance. This would confuse language bindings and would probably confuse other developers. A simple foo_object_get_instance() is usually fine. > the second method has the advantage that it works even if you call > g_object_new(FOO_TYPE_OBEJCT, NULL) directly instead of passing through > your own constructor function. > > > 2. Is it possible to create a final class ? (i.e A class which cannot > > be derived) in GObjects? > > yes. typedef your struct inside the header file, but define it inside > your c source file. if someone tries to subclass that object the > compiler will print an error because the type is incomplete. -- Murray Cumming murrayc@xxxxxxxxxxx www.murrayc.com www.openismus.com _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
