CAD软件中无级UNDO、REDO的实现  

Implement of stepless undo and redo function in cad software

作　　者：黄隆[1] 许连远[1] 何援军[2] 

机构地区：[1]同济大学机械系,上海200092 [2]上海交通大学计算机系,上海200030

出　　处：《浙江工业大学学报》2000年第S1期23-28,共6页Journal of Zhejiang University of Technology

摘　　要：AD软件中的UNDO和REDO功能是图形编辑的两大关键功能 ,作者提出了显示链、备份链和命令链的三链数据结构 ,利用MFC类库里的典型类实现链的构造并利用C +The Undo and Redo function plays a key role on Graphic Edit in Graphic Software . The paper proposes a method of managing data with three chains including show chain , backup chain and command chain. The program takes full advantage of some special classes in Microsoft Foundation Class and realizes the management of different graphic entity classes according to the Polymorphism theory of C++ programming language.

关 键 词：CAD UNDO REDO 虚函数 多态性 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]