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Foundations of
Qt Development
Johan Thelin
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Foundations of Qt Development
Copyright © 2007 by Johan Thelin
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying, recording, or by any information storage or retrieval
system, without the prior written permission of the copyright owner and the publisher.
ISBN-13 (pbk): 978-1-59059-831-3
ISBN-10 (pbk): 1-59059-831-8
Printed and bound in the United States of America 9 8 7 6 5 4 3 2 1
Trademarked names may appear in this book. Rather than use a trademark symbol with every occurrence
of a trademarked name, we use the names only in an editorial fashion and to the benefit of the trademark
owner, with no intention of infringement of the trademark.
Qt, the Qt logo, Qtopia, the Qtopia logo, Trolltech, and the Trolltech logo are registered trademarks of
Trolltech ASA and/or its subsidiaries in the U.S. and other countries. All rights reserved.
Lead Editor: Jason Gilmore
Technical Reviewer: Witold Wysota
Editorial Board: Steve Anglin, Ewan Buckingham, Gary Cornell, Jonathan Gennick, Jason Gilmore,
Jonathan Hassell, Chris Mills, Matthew Moodie, Jeffrey Pepper, Ben Renow-Clarke, Dominic Shakeshaft,
Matt Wade, Tom Welsh
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Contents at a Glance
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
About the Author . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
About the Technical Reviewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi
PART 1 ■ ■ ■ Getting to Know Qt
■
The Qt Way of C++ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CHAPTER 2
Rapid Application Development Using Qt . . . . . . . . . . . . . . . . . . . . . . . 33
CHAPTER 3
Widgets and Layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
CHAPTER 4
The Main Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
PART 2 ■ ■ ■ The Qt Building Blocks
■
The Model-View Framework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
CHAPTER 6
Creating Widgets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
CHAPTER 7
Drawing and Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
CHAPTER 8
Files, Streams, and XML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
CHAPTER 9
Providing Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
CHAPTER 10 Internationalization and Localization . . . . . . . . . . . . . . . . . . . . . . . . . . 279
■
CHAPTER 11 Plugins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303
■
CHAPTER 12 Doing Things in Parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
■
CHAPTER 13 Databases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371
■
CHAPTER 14 Networking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403
■
CHAPTER 15 Building Qt Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445
■
CHAPTER 16 Unit Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 471
APPENDIX A Third-Party Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501
■
APPENDIX B Containers, Types, and Macros . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 507
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 513
v
CHAPTER 1
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CHAPTER 5
■
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PART 3 ■ ■ ■ Appendixes
■
■
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