Qt Reference Documentation (Open Source Edition)

Note: This edition is for the development of Free and Open Source software only; see Commercial Edition.

Getting Started	General	Qt Community
What's New in Qt 4 How to Learn Qt Installation Tutorial and Examples Porting from Qt 3 to Qt 4	About Qt About Trolltech Commercial Edition Open Source Edition Frequently Asked Questions	Mailing Lists Qt Quarterly Qt Solutions Contributed Qt Components How to Report a Bug
API Reference	Core Features	Key Technologies
All Classes Main Classes Grouped Classes Annotated Classes Qt Classes by Module Inheritance Hierarchy All Functions All Overviews and HOWTOs	Signals and Slots Object Model Layout Management Paint System Drag and Drop Tool and Container Classes Internationalization Plugin System	Multithreaded Programming Main Window Architecture Rich Text Processing Model/View Programming SQL Module Network Module XML Module OpenGL Module
Platforms	Tools	Licenses & Credits
Platform-Specific Notes ActiveQt Framework Qt Widget Gallery	Qt Designer Qt Assistant Qt Linguist qmake All Tools	GNU General Public License Q Public License Third-Party Licenses Used in Qt Other Licenses Used in Qt Credits

Qt 4.0.0