* clutter/clutter-actor.c:
(clutter_actor_real_request_coords),
(clutter_actor_request_coords),
(clutter_actor_class_init): Provide a default ::request_coords()
implementation in ClutterActor and use it to store the bounding
box passed to clutter_actor_request_coords(). This makes the code
more reliable and clean, and avoids a call to the subclass
request_coords() method if the bounding box did not change. Now,
every class overriding ClutterActor::request_coords() *must* chain
up to the parent class method or the bounding box will not be
saved inside the ClutterActor structure.
* clutter/clutter-entry.c:
* clutter/clutter-group.c:
* clutter/clutter-hbox.c:
* clutter/clutter-label.c:
* clutter/clutter-texture.c:
* clutter/clutter-vbox.c: Chain up to the parent class
request_coords() method.
* subclassing-ClutterActor.sgml: Add a chapter about how to
correctly subclass the actor base class.
* clutter-docs.sgml: Include the new chapter about subclassing
ClutterActor; add a description for some of the API reference
parts.
