Creating and customizing reusable interface objects using stimulus response demonstration

The development of user interfaces has become easier with the advent of graphical layout systems. Such systems allow a developer to locate and size predefined interactive objects directly in the interface he is developing. However, the objects provided in graphical layout systems have restricted forms and behaviors. Thus, the developer has limited flexibility in the kinds of interfaces he can create. DEMO is a user interface development system (UIDS) that allows interface objects to be created from scratch. Using a drawing editor, the developer specifies the interactive behavior of the objects by stimulus-response demonstration. DEMO generalizes from the demonstrations, and automatically generates an implementation of the interface