[clutter] Clutter Events

[varun shrivastava]

hi
     I want to ask about following events that what are these events and how
they are useful

                    ClutterScrollEvent
<http://clutter-project.org/docs/clutter/0.6/clutter-Events.html#ClutterScrollEvent>;
                    ClutterStageStateEvent
<http://clutter-project.org/docs/clutter/0.6/clutter-Events.html#ClutterStageStateEvent>;
                    ClutterCrossingEvent
<http://clutter-project.org/docs/clutter/0.6/clutter-Events.html#ClutterCrossingEvent>;

The document doesn't explain any thing about them.

Whats the difference between Pointer Motion event and Pointer Scroll Event

thanks and regards
varun