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Qt's Modules

Qt 4 consists of several modules, each of which lives in a separate library.

QtCoreCore non-GUI classes used by other modules
QtGuiGraphical user interface components
QtNetworkClasses for network programming
QtOpenGLOpenGL support classes
QtSqlClasses for database integration using SQL
QtSvgClasses for displaying the contents of SVG files
QtXmlClasses for handling XML
QtDesignerClasses for extending Qt Designer
QtUiToolsClasses for handling Qt Designer forms in applications
QtAssistantSupport for online help
Qt3SupportQt 3 compatibility classes
QtTestTool classes for unit testing

The following extension modules are available in the Qt Commercial Editions on Windows:

QAxContainerExtension for accessing ActiveX controls
QAxServerExtension for writing ActiveX servers

The following extension module is available in all Qt Editions on Unix platforms:

QtDBusClasses for Inter-Process Communication using the D-BUS

If you use qmake to build your projects, the QtCore and QtGui modules are included by default. To link only against QtCore, add the following line to your .pro file:

 QT -= gui

On Windows, if you do not use qmake or the Visual Studio Integration available to commercial licensees, you also need to link against the qtmain library.

See also Qt's Classes.

[Next: QtCore Module]

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Qt 4.2.3