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Chapter 1: Welcome to the MVC World

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that knew how to render what you wanted to render. For example, if you wanted to draw a rectangle or a

circle, you ’ d subclass an existing class for the appropriate rendering. Controllers, in the Smalltalk world,

were originally conceived as being very thin, providing a means of sending messages to the model.

This is not a book on Smalltalk, but Smalltalk ’ s impact on modern computing in general and

programming in particular can ’ t be overstated. The Macintosh, Windows, and X Windows development

efforts have borrowed heavily from the Smalltalk windowed interface. In fact, the early Apple GUIs

were indistinguishable from Smalltalk - 80 v2 (as illustrated in Figure 1 - 2 ). Many of the text - based user

interfaces in DOS used Smalltalk offshoots like DigiTalk (Figure 1 - 3 ).

Figure 1-2

Figure 1-3