C++ Qt4 GUI编程全攻略：从基础到高级实战

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《C/C++ GUI编程实战：使用Qt4》（第二版）由Jasmin Blanchette和Mark Summerfield共同编写，与Trolltech Press合作出版。本书分为四个主要部分，全面介绍了Qt4在C++图形用户界面开发中的应用。 **Part I: 基础Qt** 这部分涵盖了Qt4的基础入门，包括： 1. **入门指南**：介绍Qt的基本概念和环境设置，使读者对Qt4有初步了解。 2. **对话框创建**：讲解如何设计和实现用户交互的基本对话框元素。 3. **主窗口设计**：构建应用程序的核心界面，包括窗口布局和事件处理。 4. **功能实现**：探讨如何通过C++实现具体的功能模块，如数据处理、用户输入等。 5. **自定义控件**：提供定制Qt组件的方法，以满足特定需求。 **Part II: 中级Qt** 这一阶段深入探讨： 6. **布局管理**：理解并掌握Qt的布局系统，如QLayout和网格布局。 7. **事件处理**：讲解如何捕捉和响应用户的操作，以及事件循环的工作原理。 8. **2D图形**：利用Qt的绘图功能，实现动态图形和动画效果。 9. **拖放功能**：构建支持拖放操作的用户界面，增强用户体验。 10. **item view类**：学习列表、树视图和表格等数据展示方式。 11. **容器类**：理解并使用容器类（如QListWidget、QDockWidget等）组织UI元素。 12. **输入/输出**：涉及文件操作、网络I/O和数据持久化。 13. **数据库集成**：如何通过Qt与各种数据库进行交互。 14. **多线程编程**：确保GUI的响应性和并发性，提高应用程序性能。 15. **网络编程**：利用Qt处理网络请求和数据通信。 16. **XML支持**：解析和生成XML文档，便于数据交换。 17. **在线帮助**：提供应用程序的帮助文档和在线查询功能。 **Part III: 高级Qt** 这部分涉及更高级的主题： 18. **国际化**：如何使应用程序适应不同语言和地区的需求。 19. **界面风格定制**：改变应用程序的外观，提升视觉一致性。 20. **3D图形**：利用Qt的3D图形库，创建复杂的3D场景。 21. **插件开发**：扩展Qt功能的模块化方法。 22. **脚本支持**：通过脚本语言控制和自动化应用程序行为。 23. **平台特定特性**：针对不同操作系统优化代码，充分利用平台特性。 24. **嵌入式编程**：在嵌入式设备上部署和调试Qt应用。 **IV: 附录** - **获取和安装Qt**：指南和技巧，帮助读者安装和配置Qt开发环境。 - **构建Qt应用程序**：编译和打包步骤，确保程序的稳定运行。 - **Qt Jambi简介**：面向Java和C#程序员的C++和Qt结合的简要介绍。 - **索引**：提供全书内容的快速检索工具。《C/C++ GUI编程实战：使用Qt4》是一本涵盖从基础到高级的Qt4开发教程，无论你是初学者还是经验丰富的开发者，都能从中找到所需的技术支持和实践经验。作者们以清晰的步骤和实例展示了如何用C++与Qt4构建高效、美观且功能丰富的图形用户界面。

developers to finding the right solutions made Qt special. That dedication is

just as strong today and affects everyone who maintains and develops Qt. For

us, working on Qt is a responsibility and a privilege. We are proud of helping

to make your professional and open source lives easier and more enjoyable.

One of the things that makes Qt a pleasure to use is its online documentation.

But the documentation's focus is primarily on individual classes, with little

said about how to build sophisticated real-world applications. This excellent

book fills that gap. It shows you what Qt has to offer, how to program Qt the

"Qt way", and how to get the best from Qt. The book will teach a C++, Java, or

C# programmer how to program Qt, and provides enough advanced material to

satisfy experienced Qt programmers. The book is packed with good examples,

advice, and explanations—and it is the text that we use to induct all new

programmers who join Trolltech.

Nowadays, a vast number of commercial and free Qt applications are

available for purchase or download. Some are specialized for particular

vertical markets, while others are aimed at the mass-market. Seeing so many

applications built with Qt fills us with pride and inspires us to make Qt even

better. And with the help of this book, there will be more and higher-quality Qt

applications than ever before.

Matthias Ettrich

Berlin, Germany

November 2007

Preface

Qt is a comprehensive C++ application development framework for creating

cross-platform GUI applications using a "write once, compile anywhere"

approach. Qt lets programmers use a single source tree for applications that

will run on Windows 98 to Vista, Mac OS X, Linux, Solaris, HP-UX, and

many other versions of Unix with X11. The Qt libraries and tools are also part

of Qt/Embedded Linux, a product that provides its own window system on top

of embedded Linux.

The purpose of this book is to teach you how to write GUI programs using Qt

4. The book starts with "Hello Qt" and quickly progresses to more advanced

topics, such as creating custom widgets and providing drag and drop. The text

is complemented by a set of examples that you can download from the book's

web site, http://www.informit.com/title/0132354160. Appendix A explains

how to download and install the software, including a free C++ compiler for

those using Windows.

The book is divided into three parts. Part I covers all the fundamental concepts

and practices necessary for programming GUI applications using Qt.

Knowledge of this part alone is sufficient to write useful GUI applications.

Part II covers central Qt topics in greater depth, and Part III provides more

specialized and advanced material. You can read the chapters of Parts II and III

in any order, but they assume familiarity with the contents of Part I. The book

also includes several appendixes, with Appendix B showing how to build Qt

applications and Appendix C introducing Qt Jambi, the Java version of Qt.

The first Qt 4 edition of the book built on the Qt 3 edition, although it was

completely revised to reflect good idiomatic Qt 4 programming techniques and

included new chapters on Qt 4's model/view architecture, the new plugin

framework, embedded programming with Qt/Embedded Linux, and a new

appendix. This extended and revised second edition has been thoroughly

updated to take advantage of features introduced in Qt versions 4.2 and 4.3,

and includes new chapters on look and feel customization and application

scripting as well as two new appendixes. The original graphics chapter has

been split into separate 2D and 3D chapters, which between them now cover

the new graphics view classes and QPainter's OpenGL back-end. In addition,

much new material has been added to the database, XML, and embedded

programming chapters.

This edition, like its predecessors, emphasizes explaining Qt programming and

providing realistic examples, rather than simply rehashing or summarizing Qt's

extensive online documentation. Because the book teaches solid Qt 4

programming principles and practices, readers will easily be able to learn the

new Qt modules that come out in Qt 4.4, Qt 4.5, and later Qt 4.x versions. If

you are using one of these later versions, be sure to read the "What's New in Qt

4.x" documents in the reference documentation to get an overview of the new

features that are available.

We have written the book with the assumption that you have a basic knowledge

of C++, Java, or C#. The code examples use a subset of C++, avoiding many

C++ features that are rarely needed when programming Qt. In the few places

where a more advanced C++ construct is unavoidable, it is explained as it is

used. If you already know Java or C# but have little or no experience with

C++, we recommend that you begin by reading Appendix D, which provides

sufficient introduction to C++ to be able to use this book. For a more thorough

introduction to object-oriented programming in C++, we recommend C++

How to Program by P. J. Deitel and H. M. Deitel (Prentice Hall, 2007), and

C++ Primer by Stanley B. Lippman, Josée Lajoie, and Barbara E. Moo

(Addison-Wesley, 2005).

Qt made its reputation as a cross-platform framework, but thanks to its intuitive

and powerful API, many organizations use Qt for single-platform development.

Adobe Photoshop Album is just one example of a mass-market Windows

application written in Qt. Many sophisticated software systems in vertical

markets, such as 3D animation tools, digital film processing, electronic design

automation (for chip design), oil and gas exploration, financial services, and

medical imaging, are built with Qt. If you are making a living with a successful

Windows product written in Qt, you can easily create new markets in the Mac

OS X and Linux worlds simply by recompiling.

Qt is available under various licenses. If you want to build commercial

applications, you must buy a commercial Qt license from Trolltech; if you want

to build open source programs, you can use the open source (GPL) edition. The

K Desktop Environment (KDE) and most of the open source applications that

go with it are built on Qt.

In addition to Qt's hundreds of classes, there are add-ons that extend Qt's scope

and power. Some of these products, like the Qt Solutions components, are

available from Trolltech, while others are supplied by other companies and by

the open source community; see

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