On 31 January 2011 13:32, Jannis Pohlmann <jan...@xfce.org> wrote: >> Can anyone point me in the direction of code examples where the >> construction of the g object requires a parameter so I can see how to >> do it please? - I can't make sense of the documentation. > > I usually do this by adding a construct or construct-only property to > the object class and creating a my_object_new() function that takes a > parameter for this property that I can then pass to g_object_new(). > > Here's a simple example from Xfce's XDG menu library garcon: GarconMenu > is the object and it needs a menu file (a GFile object) to be > constructed properly. So what we did is to to install a construct-only > property like this: > > http://git.xfce.org/libs/garcon/tree/garcon/garcon-menu.c#n246
It looks straight forward at first glance but soon becomes apparent it's not at all :/ I want to pass a const char** null terminated list of C strings - which is obviously not a G_TYPE_FILE! I thought maybe I could use G_TYPE_ARRAY but that results in: GLib-GObject-CRITICAL **: g_param_spec_object: assertion `g_type_is_a (object_type, G_TYPE_OBJECT)' failed So I've no idea what to do there. It's as clear as mud; I'm a GObject newb. > and write a _new() function that takes a GFile for this property and > passes it to g_object_new(): > > http://git.xfce.org/libs/garcon/tree/garcon/garcon-menu.c#n459 > > This property will not be available in the init function (e.g. > garcon_menu_init) but if you want to do something with it before the > object can be used by the outside world, you can do that by overriding > the GObject constructed function like you do with finalize or > get_property. In constructed, the construct and construct-only > properties will be set and you can do something with them. > Anyway, thanks for making an effort to help. I think the only way anyone could provide any further help here would be to show me an example that works using a const char ** null terminated list of c strings as a parameter to the constructor. I will most likely avoid GObject all together and do it the old fashioned C way as this only seems to be making it more complex than necessary. Thanks, James. _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
