Star graphics: An object-oriented implementation

  • Authors:
  • Daniel E. Lipkie;Steven R. Evans;John K. Newlin;Robert L. Weissman

  • Affiliations:
  • Xerox Corporation, El Segundo, California;Xerox Corporation, Palo Alto, California;Xerox Corporation, Palo Alto, California;Xerox Corporation, Palo Alto, California

  • Venue:
  • SIGGRAPH '82 Proceedings of the 9th annual conference on Computer graphics and interactive techniques
  • Year:
  • 1982

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Abstract

The XEROX Star 8010 Information System features an integrated text and graphics editor. The Star hardware consists of a processor, a large bit-mapped display, a keyboard and a pointing device. Star's basic graphic elements are points, lines, rectangles, triangles, graphics frames, text frames and bar charts. The internal representation is in terms of idealized objects that are displayed or printed at resolutions determined by the output device. This paper describes the design and implementation of a graphics editor using an object-oriented technique based on a Star-wide subclassing method called the Trait Mechanism.