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Brad Myers

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2012
 
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Oney, Stephen, Myers, Brad and Brandt, Joel (2012): ConstraintJS: programming interactive behaviors for the web by integrating constraints and states. In: Proceedings of the 2012 ACM Symposium on User Interface Software and Technology 2012. pp. 229-238.

Interactive behaviors in GUIs are often described in terms of states, transitions, and constraints, where the constraints only hold in certain states. These constraints maintain relationships among objects, control the graphical layout, and link the user interface to an underlying data model. However, no existing Web implementation technology provides direct support for all of these, so the code for maintaining constraints and tracking state may end up spread across multiple languages and libraries. In this paper we describe ConstraintJS, a system that integrates constraints and finite-state machines (FSMs) with Web languages. A key role for the FSMs is to enable and disable constraints based on the interface's current mode, making it possible to write constraints that sometimes hold. We illustrate that constraints combined with FSMs can be a clearer way of defining many interactive behaviors with a series of examples.

© All rights reserved Oney et al. and/or ACM Press

 
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May 19

Design can be art. Design can be aesthetics. Design is so simple, that's why it is so complicated.

-- Paul Rand, 1997

 
 

Featured chapter

Read the fascinating history of Wearable Computing, told by its father, Steve Mann

Read Steve's chapter !

 
 

Help us help you!