Called when selection changes. Note this method fires exactly once for any given change unlike the selectionChanged event. This event is fired
once after selection/deselection has completed. The result is one event per mouse-down event. For a drag selection there
will be two events fired: one when the first record is selected and once when the range is completed.
This event is
also fired when selection is updated by a direct call to one of the DataBoundComponent select/deselect methods. Calls on
the Selection object do not trigger this event.
- Parameters:
event - the event