Affiliation:
1. Department of Computer Science, Oregon State University, Corvallis, Oregon
Abstract
An
active-object user interface system
(AOUIS) is a user interface system implemented as an
active object system
(AOS). An AOS is a
transition-based
object-oriented system suitable for the design of various concurrent systems. In an AOUIS,
user interface objects
, which are sometimes called "widgets", are represented as
active user interface objects
(AUIOs). The behavior of an AUIO is defined by the transition rules, the equational assignment statements, and the event routines provided in its class definition. Furthermore, an AUIO can be constructed from its component AUIOs through structural composition as if it were a hardware object. Thus, AUIOs are better encapsulated and provide more flexible communication protocols than ordinary user interface objects. In addition,
declarative
descriptions of
multiple
views can be provided for each AUIO.
Publisher
Association for Computing Machinery (ACM)