9780131872493

Learn GUI programming using Qt4, the powerful crossplatform framework, with the only official Qt book approved by Trolltech.

Foreword

ix

Preface

xi

Acknowledgments

xiii

A Brief History of Qt

xv

Part I: Basic Qt

Getting Started

3

(10)

Hello Qt

3

(2)

Making Connections

5

(1)

Laying Out Widgets

6

(3)

Using the Reference Documentation

9

(4)

Creating Dialogs

13

(30)

Subclassing QDialog

13

(7)

Signals and Slots in Depth

20

(3)

Rapid Dialog Design

23

(6)

Shape-Changing Dialogs

29

(7)

Dynamic Dialogs

36

(1)

Built-in Widget and Dialog Classes

37

(6)

Creating Main Windows

43

(30)

Subclassing QMainWindow

44

(4)

Creating Menus and Toolbars

48

(4)

Setting Up the Status Bar

52

(2)

Implementing the File Menu

54

(7)

Using Dialogs

61

(6)

Storing Settings

67

(1)

Multiple Documents

68

(3)

Splash Screens

71

(2)

Implementing Application Functionality

73

(28)

The Central Widget

73

(1)

Subclassing QTableWidget

74

(6)

Loading and Saving

80

(3)

Implementing the Edit Menu

83

(4)

Implementing the Other Menus

87

(4)

Subclassing QTableWidgetItem

91

(10)

Creating Custom Widgets

101

(36)

Customizing Qt Widgets

101

(2)

Subclassing QWidget

103

(10)

Integrating Custom Widgets with Qt Designer

113

(3)

Double Buffering

116

(21)

Part II: Intermediate Qt

Layout Management

137

(26)

Laying Out Widgets on a Form

137

(6)

Stacked Layouts

143

(2)

Splitters

145

(3)

Scrolling Areas

148

(2)

Dock Widgets and Toolbars

150

(2)

Multiple Document Interface

152

(11)

Event Processing

163

(12)

Reimplementing Event Handlers

163

(5)

Installing Event Filters

168

(3)

Staying Responsive During Intensive Processing

171

(4)

2D and 3D Graphics

175

(30)

Painting with QPainter

175

(5)

Painter Transformations

180

(8)

High-Quality Rendering with QImage

188

(2)

Printing

190

(8)

Graphics with OpenGL

198

(7)

Drag and Drop

205

(12)

Enabling Drag and Drop

205

(5)

Supporting Custom Drag Types

210

(5)

Clipboard Handling

215

(2)

Item View Classes

217

(34)

Using the Item View Convenience Classes

218

(7)

Using Predefined Models

225

(5)

Implementing Custom Models

230

(14)

Implementing Custom Delegates

244

(7)

Container Classes

251

(22)

Sequential Containers

252

(8)

Associative Containers

260

(3)

Generic Algorithms

263

(2)

Strings, Byte Arrays, and Variants

265

(8)

Input/Output

273

(20)

Reading and Writing Binary Data

274

(5)

Reading and Writing Text

279

(6)

Traversing Directories

285

(1)

Embedding Resources

286

(1)

Inter-Process Communication

287

(6)

Databases

293

(18)

Connecting and Querying

294

(5)

Presenting Data in Tabular Form

299

(5)

Implementing Master-Detail Forms

304

(7)

Networking

311

(28)

Writing FTP Clients

311

(9)

Writing HTTP Clients

320

(3)

Writing TCP Client--Server Applications

323

(10)

Sending and Receiving UDP Datagrams

333

(6)

XML

339

(12)

Reading XML with SAX

339

(5)

Reading XML with DOM

344

(4)

Writing XML

348

(3)

Providing Online Help

351

(10)

Tooltips, Status Tips, and ``What's This?'' Help

351

(2)

Using QTextBrowser as a Simple Help Engine

353

(3)

Using Qt Assistant for Powerful Online Help

356

(5)

Part III: Advanced Qt

Internationalization

361

(20)

Working with Unicode

362

(3)

Making Applications Translation-Aware

365

(6)

Dynamic Language Switching

371

(5)

Translating Applications

376

(5)

Multithreading

381

(18)

Creating Threads

381

(4)

Synchronizing Threads

385

(6)

Communicating with the Main Thread

391

(5)

Using Qt's Classes in Secondary Threads

396

(3)

Creating Plugins

399

(16)

Extending Qt with Plugins

400

(8)

Making Applications Plugin-Aware

408

(4)

Writing Application Plugins

412

(3)

Platform-Specific Features

415

(24)

Interfacing with Native APIs

415

(4)

Using ActiveX on Windows

419

(12)

Handling X11 Session Management

431

(8)

Embedded Programming

439

(54)

Getting Started with Qtopia

440

(1)

Customizing Qtopia Core

441

(6)

Appendices

A. Installing Qt

447

(4)

B. Introduction to C++ for Java and C# Programmers

451

(42)

Index

493

What is included with this book?

The New copy of this book will include any supplemental materials advertised. Please check the title of the book to determine if it should include any access cards, study guides, lab manuals, CDs, etc.

The Used, Rental and eBook copies of this book are not guaranteed to include any supplemental materials. Typically, only the book itself is included. This is true even if the title states it includes any access cards, study guides, lab manuals, CDs, etc.

Qt is a comprehensive C++framework for developing 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 XP, Mac OS X, Linux, Solaris, HP-UX, and many other versions of Unix with X11. The Qt libraries and tools are also part of Qtopia Core, 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 CD that contains the source code of the example programs. The CD also includes the open source edition of Qt 4.1.1 for all supported platforms, as well as MinGW, a set of freely available development tools that can be used to build Qt applications on Windows. Appendix A explains how to install the software. The book is divided into three parts. Part I covers all the 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. The chapters of Parts II and III can be read in any order, but they assume familiarity with the contents of Part I. Readers of the Qt 3 edition of this book will find this new edition familiar in both content and style. This edition has been updated to take advantage of Qt 4's new features (including some that were introduced with Qt 4.1) and to present code that shows good idiomatic Qt 4 programming techniques. In many cases, we have used similar examples to the ones used in the Qt 3 edition. This will not affect new readers, but will help those who read the previous edition orient themselves to Qt 4's cleaner, clearer, and more expressive style. This edition includes new chapters covering Qt 4's model/view architecture, the new plugin framework, and embedded programming with Qtopia, as well as two new appendices. And just like the Qt 3 book, the emphasis is on explaining Qt programming rather than simply rehashing or summarizing Qt's extensive online documentation. 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 where 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 B, 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 Harvey Deitel and Paul Deitel, and the C++ Primer by Stanley B. Lippman, Josee Lajoie, and Barbara E. Moo. Qt made its reputation as a cross-platform framework, but because of 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; if you want to build open source programs, you can use the open source (GPL) edition. Qt is the foundation on whic

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C++ Gui Programming With Qt 4

C++ Gui Programming With Qt 4

0131872494

Summary

Table of Contents

Supplemental Materials

Excerpts