Qt4编程深入指南：C++ GUI实战

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"《C++ GUI Qt4编程》(第2版)是关于使用Qt库进行C++图形用户界面开发的书籍，涵盖了从基础到高级的广泛主题，适合Qt4.4、Qt4.5及更高版本的开发。" 本书详细介绍了在C++中使用Qt框架设计和实现GUI应用的各种技术。前5章着重于Qt的基础，可能包含安装Qt环境、Qt Creator集成开发环境的使用、Qt类库的基本概念、信号与槽机制、以及Q_OBJECT宏等核心元素。这些章节旨在让读者对Qt编程有一个全面的理解。在基础部分之后，书中的第二部分深入探讨了Qt的高级特性，如布局管理，使得开发者可以方便地在界面上组织控件；事件处理，包括事件循环和自定义事件，帮助处理用户交互；二维和三维图形绘制，利用QPainter和QGLWidget等类进行高级图形渲染；拖放功能，允许用户在应用程序之间移动数据；项视图类（如QTableView、QListView和QTreeView）用于展示和操作结构化数据；容器类（如QList、QVector和QMap等）提供高效的数据存储和访问；输入/输出支持，通过QFile、QTextStream等进行文件操作；数据库集成，使用QSql*类与各种数据库系统交互；多线程编程，利用QThread处理并发任务；网络编程接口，如QNetworkAccessManager，用于HTTP、FTP等网络通信；XML处理，使用QDomDocument和QXmlStreamReader解析和生成XML文档；国际化支持，通过QLocale和QTranslator实现多语言应用；以及嵌入式系统的Qt应用开发。书中所讲述的设计模式和最佳实践，源自实际的开源项目，旨在让读者了解并掌握Open Source社区中的开发标准。通过这些例子，读者不仅可以学习到如何有效地使用Qt，还可以了解到开源软件开发的最佳实践。此外，该系列书籍《Prentice Hall Open Source Software Development Series》由Arnold Robbins担任系列编辑，旨在推广和教育读者关于开源技术的应用，提供一系列涵盖不同领域的开源软件开发出版物。《C++ GUI Qt4编程》(第2版)是一本全面且深入的教程，适合想要学习或提升Qt GUI编程技能的C++开发者。书中丰富的示例和详尽的解释将帮助读者掌握构建高质量图形界面应用的关键技术和方法。

ptg7041395

xvi An Introduction to Design Patterns in C++ with Qt™, 2nd Edition

certain design patterns. e signal/slot mechanism, for example, makes object-

oriented programming extremely easy and intuitive.

 i s b o o k t r i e s t o t e a c h C + + a n d Q t t o g e t h e r . W i t h Q t , c r e a t i n g v i s i b l e r e s u l t s i s

easy, usually only requiring a few lines of code. is helps overcome the complexity

of C++ as a language, makes learning it more enjoyable, and motivates students to

continue learning.

To b ec om e a g o od n ov e li st , on e m u st  rs t re a d m an y g o od n ov e ls . To b e co me a

good composer, one must rst listen to good music. e same thing applies to

software developers. Working with an expertly designed library is important to

becoming a good software developer. Having the source code for this library available

helps developers understand many details, and it can be a place to nd inspiration

and maybe even solutions to some problems. Qt being LGPL

licensed makes this

source code available to everybody.

Every C++ student should learn the language in conjunction with Qt. is book

is committed to bringing this synergy to students. Qt users tend to be passionate

about the framework, and Paul and Alan Ezust are no exception. is second edition

of their book covers even more Qt technologies with more screenshots of the

developed applications.

Learning application development has never been easier than it is today. Qt

comes in an all-encompassing and integrated free package that provides an integrated

development environment (IDE), a compiler, a debugger, the Qt library, tools, and

documentation with tons of examples and demos.

Previously, many emerging software developers got stuck along the way because

there was no proper guidance or the result of the hard coding work was not rewarding

enough. With Qt you can create more with less coding. Bringing your software onto

another platform like a mobile phone, embedded hardware, Mac, Windows, Linux

desktop, and others is only a recompile away. e people who build Qt do everything

possible to make developers’ lives as easy as possible. Alan and Paul’s book can give

you, the developer, the guidance you need.

We hope that you enjoy the journey to becoming a C++ developer [who can] one

day contribute to KDE or one of the many other open source projects using Qt.

Maybe you can write Qt software for a living, as many thousands of developers do

GNU Lesser General Public License

ptg7041395

xx An Introduction to Design Patterns in C++ with Qt, 2nd Edition

Many of these benets can be achieved with C++ used with Qt.

• Qt provides a comprehensive set of GUI classes that run faster, look better,

and are more flexible than Java’s Swing classes.

• Signals and slots are easier to use than (Action|Event|Key)Listener inter-

faces in Java.

• Qt has a plugin architecture that makes it possible to load code into an ap-

plication without recompiling or relinking.

• Q t p r o v i d e s foreach , which makes iteration through collections simpler to

read and write.

Although Qt does not provide garbage collection, it provides a variety of alterna-

tives you can use to avoid the need to delete heap objects directly:

• Containers (see Section 6.8 ) that support reference counting and copy on

write

• Parents and children (see Section 8.2 )

• QPointer , and QSharedPointer , and QWeakReference (see Section 19.11 ).

• Subobjects (see Section 2.14 )

• Stack objects (see Section 20.3 )

Using C++ with Qt comes close to (and sometimes exceeds) Java in ease of use,

comprehensiveness, and convenience. It signicantly exceeds Java in the areas of

speed and eciency, making everything from processing-intensive server applica-

tions to high-speed graphics-intensive games possible.

A n o t h e r b e n e  t o f l e a r n i n g C + + w i t h Q t c o m e s f r o m Q t ’ s w i d e s p r e a d u s e i n

open source projects. ere is already a great wealth of free open source code that

you can learn from, reuse, and perhaps help to improve.

How to Use This Book

Part I contains the meat of the course: introduction to C++, UML, Qt core,

QObjects, Widgets, Model-View, SQL, XML, and design patterns. is Part is

designed to avoid forward referencing as much as possible, and it presents the topics

in an order and a level of detail that should not overwhelm someone who is new to

C/C++.

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