Chapter 5. The Figure Hierarchy

This chapter introduces the figure classes of the drawing program. Each figure is responsible for deciding whether it is hit by a mouse click or if it is enclosed by a rectangle. It is also responsible for moving or modifying, as well as drawing and communicating with a file stream and the clipboard.

The drawing figure hierarchy is made up of the Draw, LineFigure, ArrowFigure, RectangleFigure, and EllipseFigure classes, as shown in the following image: