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Niels Jørgen Christensen


Publications by Niels Jørgen Christensen (bibliography)

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Jensen, Henrik Wann and Christensen, Niels Jørgen (1995): Photon maps in bidirectional Monte Carlo ray tracing of complex objects. In Computers & Graphics, 19 (2) pp. 215-224. http://dx.doi.org/10.1016/0097-8493(94)00145-O

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Carlsen, Niels Vejrup, Christensen, Niels Jørgen and Tucker, Hugh A. (1989): An Event Language for Building User Interface Frameworks. In: Sibert, John L. (ed.) Proceedings of the 2nd annual ACM SIGGRAPH symposium on User interface software and technology November 13 - 15, 1989, Williamsburg, Virginia, United States. pp. 133-140.

Languages based on the event model are widely regarded as expressive and flexible notations for the specification of interactive graphical user interfaces. However, until now, they have only been used to specify and implement the dialogue control component of user interfaces. This paper presents an extension of the event model. A computable notation, the event language, based on this is used to construct a complete user interface framework. The framework forms the run-time component of a UIMS. The event language allows the modular construction of complex event systems. This is supported by the addition of a tagged addressing mode. Furthermore, the control structure of event handlers is extended with exception management, permitting unspecified events and thereby facilitating the use of predefined building blocks. A general purpose run-time framework for user interfaces has been constructed using the event language. We present the architecture of the presentation component of this framework including the window manager and the I/O model.

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