your code with s/style->klass->xthickness/style->xthickness/g and
same for ythickness.
+- Some GtkStyle draw_ methods have been removed (cross, oval, ramp)
+ and others have been added (expander, layout). This will require
+ changes to theme engines.
+
- If you were using private GDK types, they have been rearranged
significantly. You shouldn't use private types. ;-)