October 1994
Intermediate to advanced
416 pages
10h 26m
English
book
Design Patterns: Elements of Reusable Object-Oriented Software
by Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides
Content preview from Design Patterns: Elements of Reusable Object-Oriented Software
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Chapter 2. A Case Study: Designing a Document Editor
This chapter presents a case study in the design of a “What-You-See-Is-What-You-Get” (or “WYSIWYG”) document editor called Lexi.1 We’ll see how design patterns capture solutions to design problems in Lexi and applications like it. By the end of this chapter you will have gained experience with eight patterns, learning them by example.
1Lexi’s design is based on Doc, a text editing application developed by Calder [CL92].
Figure 2.1 depicts Lexi’s user interface. A WYSIWYG representation of the document occupies the large rectangular area in the center. The document can mix text and graphics freely in a variety of formatting styles. Surrounding the document are the usual pull-down menus and ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.