GtkTextView move-cursor signal

[Charles Schmidt <cschmidt2 emich edu>]

-
I'm writing an application where I need to modify the state 
of other widgets based on the position of the cursor in a 
TextView (ie: is the cursor in an 'on' region of any 
GtkTextTag).  I've connected a callback to the 'move-cursor' 
signal, and that works well enough if the cursor is moved 
via the keyboard.  But, if I reposition the cursor with the 
mouse, the signal is not emitted, is there another signal 
(or a different signal) I should be connecting to?

-charlie