Class diagrams for interactors and selection classes

The most important selection objects and corresponding object interactors summarizes the relationships between IlvObjectInteractor and IlvSelection. Each graphic object can have an object interactor that handles the interactions. When an object is selected by IlvSelectInteractor, an IlvSelection object is created for the selected object through the method makeSelection. With the help of the selection object, the selected object can be manipulated, for example, it can be reshaped. Thus, the selection object is associated with a default object interactor. Different subclasses of IlvSelection have different default object interactors.

The view interactor classes shows the different subclasses of IlvManagerViewInteractor. Most interactors are used to create certain kinds of object, such as IlvMake. Other interactors allow the view to be zoomed in or out. The class IlvSelectInteractor allows graphic objects to be selected. It delegates some functionality to IlvSelectInteractorMoveSelection and IlvSelectInteractorMultipleSelection.