deprecated draw method and cairo context

[Evgeny <evgen ibqn googlemail com>]

Hello,

 I am looking at this article from the gnome journal
http://gnomejournal.org/article/34/writing-a-widget-using-cairo-and-gtk28, and I believe that the draw method in the section "Step 2. Drawing with Cairo" is deprecated, that should be used instead to draw with a cairo context? (api mentions gtk_widget_queue_draw_area, but I am not sure if it's still a "correct"/recommended way of using cairo with gtk...) 
is there an updated version of this article somewhere?

Evgeny