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Implementing Undo/Redo in PDF Studio Using Object-Oriented Design Pattern

Min Zhang,Kehong Wang

TOOLS '00 Proceedings of the 36th International Conference on Technology of Object-Oriented Languages and Systems (TOOLS-Asia'00)（2000）

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Abstract
PDF Studio is software that provides a visual design environment to help the user create a document with text, image and data from database, and generate the file in PDF format. Redo/undo functionality is a common requirement to most software that has visual interface for users. This paper introduces the implementation of Undo/Redo in this software and describes how the object-oriented design pattern is applied to the design and implementation.
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Key words
object-oriented design pattern,visual design environment,PDF Studio,PDF format,visual interface,common requirement,Implementing Undo,Object-Oriented Design Pattern
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