ActionScript 3.0 Design Patterns

Example: Sprite Factory | 85

is not a productive application, but it will serve as a springboard to thevertical

shooter game that we’ll develop later in the chapter.

The Project window in Figure 2-9 shows the file structure of the Shapes example.

Product Classes: Shape Widgets

The shapes on the stage (Figure 2-9) are the products in this example. These con-

crete shape widgets extend theShapeWidgetabstract class (Example 2-21). Unlike in

previous examples, we defineShapeWidgetas an abstract interface because we want

Figure 2-8. Screenshot of Shapes example stage

Figure 2-9. Shapes example Project window