A flexible multi-mode undo mechanism for a collaborative modeling environment

Authors:
Tilman Göhnert;Nils Malzahn;H. Ulrich Hoppe
Affiliations:
Collide Group, Faculty of Engineering, Department of Computational and Cognitive Sciences, University Duisburg-Essen, Duisburg, Germany;Collide Group, Faculty of Engineering, Department of Computational and Cognitive Sciences, University Duisburg-Essen, Duisburg, Germany;Collide Group, Faculty of Engineering, Department of Computational and Cognitive Sciences, University Duisburg-Essen, Duisburg, Germany
Venue:
CRIWG'09 Proceedings of the 15th international conference on Groupware: design, implementation, and use
Year:
2009

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Abstract

This paper presents a flexiblemulti-mode undo mechanismfor a collaborative modeling environment supporting different types of graph representations (including Petri Nets and System Dynamics models) as well as free-hand annotations. The undo mechanism is first introduced on a formal basis. It is implemented as an extension of the underlyingMatch-Maker collaboration server and allows for selecting from and making use of several undo variants with minimal adaptation effort. This is a basis for future usability studies comparing different versions of undo and for better adapting the undo effects to the actual user goals.