Question: GLib 2.0 Properties

[Eric Lemings <eric b lemings lmco com>]

Class C has two properties, P and Q.  P is a read/write property that
determines the value of the read-only property Q.  How do you set up
notifications so that Q is automatically updated when P changes?  I've
been connecting and emitting signals for hours now trying to figure this
thing out.  Any help greatly appreciated.

Thanks,
Eric.