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Ben Johnson <ben@xxxxxxxxx> writes:
> I made a class that defines several _new() functions, which take various
> parameters. I now want to subclass from this and keep my various _new()
> functions with more or less the same parameters, and I want the behavior
> to stay the same too. I don't see anything in the documentation about
> how to do it though. anyone know?
What about a factory function which allows one to choose the specific
derived type. For example,
GtkGroupedToggle *
gtk_grouped_toggle_new_from_widget (GType group_toggle_type,
GtkGroupedToggle *group)
GtkGroupedToggle *new_toggle = NULL;
g_return_val_if_fail(g_type_is_a(group_toggle_type,
GTK_TYPE_GROUPED_TOGGLE) == TRUE), NULL);
new_toggle = g_object_new (type, NULL);
if( new_toggle )
new_toggle = gtk_grouped_toggle_add_to_list (new_toggle, group);
return GTK_WIDGET(new_toggle);
}
You now don't need any _new() functions for derived types.
Also, isn't it bad practice to have arguments to a _new() function
which are not construction parameters? Wouldn't it be better to add
to group manually, or have g_object_new in a method of the container
so it can't exist independently?
Regards,
Roger
- --
Roger Leigh
Printing on GNU/Linux? http://gimp-print.sourceforge.net/
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