Circle object is used for circular design of circular ui-controls. It can be combined with elementary widgets and be a part of design. Or it can make itself as a ui-control which is operated by rotary event.

A Circle object extends elementary widgets in a form of circular design. It can be rendered either independently or by Eext_Circle_Surface. When a circle object handle is added with surface parameter of NULL, it is rendered independently along with Evas_Object. On the other hand, if a circle object is created with surface parameter of Eext_Circle_Surface, passed surface will render the circle object.

eext_circle_object functions are same with eext_circle_object_item functions with "default" for item_name parameter. You can check what is the meaning of "default" item in each circle object's documentation.