| Abstract: | In the present-day graphics field, a proper methodology for designing input constructs of a general purpose graphics system is needed. In this direction, this paper proposes a framework where the graphics interaction programming is formulated as event-driven procedures. The end-user actions on the input tools are represented as events and the programreactions to these events as action-processes. The constructs for programming in this framework are implemented as a part of a graphics package SODDI. The resultant programming facilities are compared with the other existing proposals, based on the conceptual differences of the respective frameworks as well as on the experiences in using the constructs. The data-structures used for implementing these constructs are also presented. |
