Eviss: A Visual System Having a Spatial Parser Generator

In this paper, a visual system Eviss is proposed. Visual systems proposed so far have been fixed on certain specifications. It is hard to make and modify such visual systems. Since Eviss has a spatial parser generator based on CMGs, it can construct various visual systems if provided with grammars which consist of production rules. In Eviss, a person who implements a visual system first defines production rules using figures. Eviss extracts constraints which hold between the figure elements. Then the person modifies them and write actions, if needed. An action is described as an arbitrary Tcl/Tk script. We can perform actions, such as calculating values, creating widgets and redrawing figures. Given a certain grammar, Eviss can parse a visual sentence (a collection of figure elements) spatially. Parsing means to apply production rules to the figure elements. When a production rule is applied, Eviss redraws the figure elements so that the constraints between them always hold. Actions, ...

• Type: Conference
• Year: 1998
• Where: APCHI
• Authors: Akihiro Baba, Jiro Tanaka
• Keywords: APCHI 1998, Figure Elements, Human Computer Interaction, Production Rule, Visual