Pass 2 or more widgets in callback

[Paulo Schreiner <paulo bewnet com br>]

What is the "correct" way to pass more than one widget in the data param
of a callback? I tried passing an array of GtkWidget* and a g_list, but
it didn't work. The approach that worked was to get one of the widget
and set pointers to the others with gtk_object_set_data, and then
gtk_object_get_data inside de callback. I wonder if there is a better
way to do it.

Thanks in advance,
Paulo Schreiner