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# Grouped Classes

This page provides a way of navigating Qt's classes by grouping related classes together. Some classes may appear in more than one group.

Group | Description
--- | ---
Abstract Widget Classes | Abstract widget classes usable through subclassing.
Accessibility Classes | Classes that provide support for accessibility.
Advanced Widgets | Advanced GUI widgets such as tab widgets and progress bars.
Basic Widgets | Basic GUI widgets such as buttons, comboboxes and scrollbars.
Database Classes | Database related classes, e.g. for SQL databases.
Date and Time Classes | Classes for handling date and time.
Desktop Environment Classes | Classes for interacting with the user's desktop environment.
Drag and Drop | Classes dealing with drag and drop and mime type encoding and decoding.
Environment Classes | Classes providing various global services such as event handling, access to system settings and internationalization.
Event Classes | Classes used to create and handle events.
Non-GUI Classes | Collection classes such as list, queue, stack and string, along with other classes that can be used without needing QApplication.
Multimedia, Graphics, and Printing | Classes that provide support for graphics (2D, and with OpenGL, 3D), image encoding, decoding, and manipulation, sound, animation, printing, etc.
Help System | Classes used to provide online-help for applications.
Layout Management | Classes handling automatic resizing and moving of widgets, for composing complex dialogs.
Shared Classes | Classes that use reference counting for fast copying.
Input/Output and Networking | Classes providing file input and output along with directory and network handling.
Main Window and Related Classes | Everything you need for a typical modern main application window, including menus, toolbars, workspace, etc.
Miscellaneous Classes | Various other useful classes.
Model/View Classes | Classes that use the model/view design pattern.
Object Model | The Qt GUI toolkit's underlying object model.
Organizers | User interface organizers such as splitters, tab bars, button groups, etc.
Plugin Classes | Plugin related classes.
Standard Dialog Classes | Ready-made dialogs for file, font, color selection and more.
Generic Containers | Qt's template-based container classes.
Text Related Classes | Classes for text processing. (See also XML Classes.)
Threading Classes | Classes that provide threading support.
Widget Appearance and Style | Appearance customization with styles, fonts, colors etc.
XML Classes | Classes that support XML, via, for example DOM and SAX.
Qtopia Core Classes | Classes that are specific to Qtopia Core (Qt for embedded Linux).