Viewlets

The Java VC provides two ways of visualising any single element of a viewable.

1.

Textually, as though the element had been printed with write/1. This is suitable for all viewable types.

2.

Graphically, as a rectangular bar on a scale representing the current bounds of a numeric_bounds type viewable element. Bounds viewlets can be aligned either vertically or horizontally.

When rendered on the screen these representations are referred to as viewlets. Figure 3.3 shows the same variable rendered using both types of viewlet.

Figure 3.3: The FD variable with initial domain 0..10, reduced to 3..5 as rendered by text and bound viewlets.