Applies any connected attributes to the renderers in @area by pulling the values from @tree_model.
the #GtkTreeModel to pull values from
the #GtkTreeIter in @tree_model to apply values for
whether @iter has children
whether @iter is expanded in the view and children are visible
3.0
See Implementation
Applies any connected attributes to the renderers in @area by pulling the values from @tree_model.