Needing GtkScrollbar and GtkViewport to expose value changes

[Brian Cameron <Brian Cameron sun com>]

Gtk Experts:

A quick question.  The ATK requires that the GtkViewport and the
GtkScrollbar support notification when their values change (e.g.
the slider or viewport is moved, etc.)

I took a look at the code, and it seems that GtkViewport
generates a "set-scroll-adjustments" signal and has the following
properties PROP_HADJUSTMENT, PROP_VADJUSTMENT, and PROP_SHADOW_TYPE.
The code isn't completely clear to me and I was wondering if these
expose value changes.

Looking at the GtkScrollbar, GtkHScrollbar, and GtkVScrollbar it
doesn't look like they generate any signals.  It looks like GtkScrollbar
exposes min_slider_length, fixed_slider_length, has_backward_stepper,
has_forward_stepper, has_secondary_backward_stepper, and 
has_secondary_forward_stepper.  Again this code isn't clear to me
and I'm also wondering if these expose value changes.

Any help would be appreicated. 

Thanks!

Brian