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Display Lists

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Display lists are used to construct and display pictures within the Virtuoso user interface. display lists are collections of shapes displayed within a form, menu, button, or window. Additionally, display lists are used by the DAG Browser to display pictures.

Display lists use pens to hold the graphical properties a shape is drawn with. A pen stores color, line style, and fill style. Pens are referred to by number. When you add a shape to a display list, you specify which pen number it should use.

Display lists are built in two ways:

• By calling the SKILL functions to add objects to the display list.
• By drawing the picture in the icon editor. You can save the picture in a file and load it whenever you need the display list again.

The display list is composed of the following objects:

• Points
• Segments
• Boxes
• Arcs
• Circles
• Donuts
• Polygons
• Paths
• RasterText
• StrokeText
• SkillObjects
• EventObjects

Display lists are not hierarchical in that a display list cannot include another display list.

Coordinates are Cartesian and specified using integer numbers. The range of the integers can be anything you wish. The display list is scaled to fit into the space provided.

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