GtkTreeView row selection change events

[Christopher Harvey <arbuckle911 gmail com>]

Hello GTKers,
What is the event name that fires when the user changes the current
GtkTreeView row selection, and what structure is it associated with? I'm
willing to check the current selection on the mouse click event except I
don't know if the current selection would be updated before or after I
receive the click event. I'm using a single selection only TreeView if
it matters.
Thanks.