Programming: Principles and Practice Using C++, 2nd Edition

12. A Display Model

“The world was black and white then.[It] didn’t turn coloruntil sometime in the 1930s.”

—Calvin’s dad

This chapter presents a display model (the output part of GUI), giving examples of use and fundamental notions such as screen coordinates, lines, and color. Line, Lines, Polygons, Axis, and Text are examples of Shapes. A Shape is an object in memory that we can display and manipulate on a screen. The next two chapters will explore these classes further, with Chapter 13 focusing on their implementation and Chapter 14 on design issues.

12.1 Why graphics?

12.2 A display model

12.3 A first example

12.4 Using a GUI library

12.5 Coordinates

12.6 Shapes

12.7 Using Shape primitives

12.7.1 Graphics headers and main

12.7.2 An almost ...