一个基于CORBA的图形用户界面体系结构及实例

随着网络计算技术的发展，软件的结构变为表示／处理／数据库分离的三级模式。表示与处理的分离导致了用户界面与应用计算间的通信成为开发交互式系统图形用户界面的关键。本文为分布式交互图形应用的开发提供了一个基于公用对象需求代理结构ＣＯＲＢＡ的用户界面体系结构，ＣＯＲＢＡ是为分布式对象系统中间件制定的一个互操作标准。在这个结构中，一些被称为代理的面向对象交互式图形构件被设计用来为图形的表示与交互提供有效的解

A GUI ARCHITECTURE BASED ON CORBA AND EXAMPLE

In the time of network computing, the structure of software is changing to representation/transaction/database architecture. After the representation separated from transaction, the communication between user interface and application computation components became critic in the development of interactive graphical user interface (GUI). This paper presents a novel GUI architecture called ALA (agent linker architecture) for the development of distributed interactive graphic application, which is based on CORBA (common object request broker architecture), an interoperability standard for middleware in distributed object management system.Under the ALA, an object oriented interactive graphic component is called agent. A agent may has state, its own thread of control, and must has some predefined interfaces to send and receive messages. The agents are designed to provide an efficient solution for the representation and management of graphic objects. Specially, some of them are responsible for the control and communication between user interface and application components. Linkers bind agents together to construct a GUI system. A Linker's responsibility is the routing and broadcast of message filtering. ALA supports larger grain reuse and flexible system composition.Moreover, it supports the design of distributed, concurrent GUIs. Finally, this paper introduces an application using the architecture, which is a multi users CASE tool integrated by some agents run on different platforms.