[Gtk2hs-users] Idiomatic way to draw with Cairo and GTK3?

[Karl S. <kar...@gm...>]

I'm still a bit of a rookie when it comes to GTK and Cairo, so please
bear with me.  I have some code that works with GTK2, but would like
to bring it up to date.

Most everything I've figured out, except the best way to replace the
`renderWithDrawable` function.  If I have a DrawingArea (or the
corresponding DrawWindow) what is the best way to draw to it directly?
 I see various bits of information about a "draw" callback and
surfaces, but nothing that has been entirely clear to me.

Thanks in advance.