#GooCanvasItemModelIFace holds the virtual methods that make up the
#GooCanvasItemModel interface.
Simple item models only need to implement the get_parent(), set_parent()
and create_item() methods.
Items that support transforms should also implement get_transform() and
set_transform(). Items that support styles should implement get_style()
and set_style().
Container items must implement get_n_children() and get_child().
Containers that support dynamic changes to their children should implement
add_child(), move_child() and remove_child().
Layout containers like #GooCanvasTable may implement
get_child_property() and set_child_property().
#GooCanvasItemModelIFace holds the virtual methods that make up the #GooCanvasItemModel interface.
Simple item models only need to implement the get_parent(), set_parent() and create_item() methods.
Items that support transforms should also implement get_transform() and set_transform(). Items that support styles should implement get_style() and set_style().
Container items must implement get_n_children() and get_child(). Containers that support dynamic changes to their children should implement add_child(), move_child() and remove_child(). Layout containers like #GooCanvasTable may implement get_child_property() and set_child_property().