widget aspect ratio control

[Jonathan Brandmeyer <jbrandmeyer earthlink net>]

How can I control the aspect ratio of a child widget (specifically, a
descendant of GtkDrawingArea)?  I've tried
gtk_window_set_geometry_hints(), but rather than constrain the geometry
of the child GtkWidget I pass this function, it applies the aspect
ration constraint to the top-level GtkWindow.  Note that the child
widget is a couple of containers removed from the top-level Window.

Thanks,
-Jonathan Brandmeyer