Method and system for enabling undo across object model...

Details Method and system for enabling undo across object model... Method and system for enabling undo across object model...

2004-10-19

2008-08-26

Chace, Christian P. (Department: 2165)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000, C707S793000, C714S019000

Reexamination Certificate

active

07418460

ABSTRACT:
A method and system provides reversibility of an operation performed by a user of an application program and associated with a modification to an object model of the application program, such as a spreadsheet program or other office productivity application program. The top item of a first undo stack associated with the application program is determined, saved, and copied to a second stack functioning as a replicated undo stack. According to one aspect of the invention, such steps are performed prior to calling an object model method that clears the first undo stack. The top item of the second replicated undo stack is placed back onto the first undo stack.

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patent: 6166739 (2000-12-01), Hugh
patent: 2003/0195899 (2003-10-01), Tsao
patent: 2005/0120214 (2005-06-01), Yeates et al.
David Eppstein , How to implement the Undo/Redo Framwork , Feb. 8, 2003 http://groups.google.com/group/comp.lang.python/browse—thread/thread/87d5aa221785dc47/45a4eb65e0ae0154?1nk=st&q=undo+stack&mum=15&gk=en.
http://www.mirrorservice.org/sites/ftp.uib.no/pub/vi/comp.editors/undo, Jul. 27, 1992.
http://web.archive.org/web/20050426052732/exceltips.vitalnews.com/pages/T0140—Preserving—the—Undo—List.html, Apr. 26, 2005.

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