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Multi-User Undo/Redo
| Content Provider | Semantic Scholar |
|---|---|
| Author | Choudhary, Rajiv Dewan, Prasun |
| Copyright Year | 1992 |
| Abstract | We have developed a multiuser undo/redo model by extending an existing single-user undo/redo model. The model, consisting of a semantic model and an implementation model, is applicable to general multiuser programs including programs ooering both WYSIWIS and WYSINWIS interaction, oor control and concurrent interaction, and atomic and non-atomic broadcast. The semantic model constructs the command history of a particular user by combining all commands, including both local and remote commands, whose results were made visible to that user. It allows a user to undo/redo corresponding commands in the command histories of all users of a program. Moreover, it allows a user to undo/redo arbitrary commands in a command history including commands executed by other users and commands that explicitly transmit information to other users. The implementation model divides the task of implementing undo/redo between generic dialogue managers and application programs. It divides application programs into three increasingly complex classes and requires increasing levels of undo/redo awareness from these classes. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.cs.purdue.edu/serc/TechReports/files/TR125P.PS |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
