tailieunhanh - Programming the Be Operating System-Chapter 3: BeOS API Overview

Tham khảo tài liệu 'programming the be operating system-chapter 3: beos api overview', công nghệ thông tin, hệ điều hành phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | In this chapter Overview of the BeOS Software Kits Software Kit Class Descriptions Chapter Example Adding an Alert to MyHelloWorld 3 BeOS API Overview Writing a Be application generally involves starting with an existing base of code and then using several of the Be software kit classes to add new functionality to the base code. In Chapter 2 BelDE Projects you saw how to ready an existing project to serve as the base for your new project. In this chapter you ll see how to select and use a software kit class to modify your new project. This chapter begins with an overview of the Be software kits. Knowing the purpose of each kit will help you quickly hone in on which kits will be of the most use in your project. After finding a kit of interest you need to locate a useful class within that kit. To do that you ll use the Be Book the electronic document by Be Inc. that serves as the BeOS class reference. Once you ve found a class of possible interest you ll read through the Be Book s class description to find out all about the class an overview of how objects are created what they re useful for and so forth. In this chapter you ll see how to get the most out of the class descriptions in the Be Book. The Be Book is essential documentation for any Be programmer but it isn t a tutorial. In this chapter I close by looking at how the Be Book describes one class the BAlert class and then go on to integrate an object of this class type in a simple program. The remaining chapters in this book provide example snippets and programs that bring to life the class descriptions found in the Be Book. Overview of the BeOS Software Kits Chapter 1 BeOS Programming Overview provided a very brief description of each kit only a sentence or two. Because you hadn t been exposed to any of the details of BeOS programming at that point out of necessity those descriptions didn t give examples of kit classes and member functions. Now that you ve 75 76 Chapter 3 BeOS API Overview studied the .