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Qt's Classes

This is a list of all Qt classes excluding the Qt 3 compatibility classes. For a shorter list that only includes the most frequently used classes, see Qt's Main Classes and the Qt 4.1 Class Chart (PDF).

QAbstractButton QDirectPainter QIODevice QResizeEvent QTcpSocket
QAbstractEventDispatcher QDirModel QItemDelegate QResource QTemporaryFile
QAbstractExtensionFactory QDockWidget QItemEditorCreatorBase QRubberBand QTestEventList
QAbstractExtensionManager QDomAttr QItemEditorFactory QScreen QTextBlock
QAbstractFileEngine QDomCDATASection QItemSelection QScreenCursor QTextBlockFormat
QAbstractFileEngineHandler QDomCharacterData QItemSelectionModel QScreenDriverFactory QTextBlockGroup
QAbstractFormBuilder QDomComment QItemSelectionRange QScreenDriverPlugin QTextBlockUserData
QAbstractGraphicsShapeItem QDomDocument QKbdDriverFactory QScrollArea QTextBrowser
QAbstractItemDelegate QDomDocumentFragment QKbdDriverPlugin QScrollBar QTextCharFormat
QAbstractItemModel QDomDocumentType QKeyEvent QSemaphore QTextCodec
QAbstractItemView QDomElement QKeySequence QSessionManager QTextCodecPlugin
QAbstractListModel QDomEntity QLabel QSet QTextCursor
QAbstractPrintDialog QDomEntityReference QLatin1Char QSetIterator QTextDecoder
QAbstractProxyModel QDomImplementation QLatin1String QSettings QTextDocument
QAbstractScrollArea QDomNamedNodeMap QLayout QSharedData QTextDocumentFragment
QAbstractSlider QDomNode QLayoutItem QSharedDataPointer QTextEdit
QAbstractSocket QDomNodeList QLCDNumber QShortcut QTextEncoder
QAbstractSpinBox QDomNotation QLibrary QShortcutEvent QTextFormat
QAbstractTableModel QDomProcessingInstruction QLibraryInfo QShowEvent QTextFragment
QAbstractTextDocumentLayout QDomText QLine QSignalMapper QTextFrame
QAccessible QDoubleSpinBox QLinearGradient QSignalSpy QTextFrameFormat
QAccessibleBridge QDoubleValidator QLineEdit QSize QTextImageFormat
QAccessibleBridgePlugin QDrag QLineF QSizeF QTextInlineObject
QAccessibleEvent QDragEnterEvent QLinkedList QSizeGrip QTextLayout
QAccessibleInterface QDragLeaveEvent QLinkedListIterator QSizePolicy QTextLength
QAccessibleObject QDragMoveEvent QLinuxFbScreen QSlider QTextLine
QAccessiblePlugin QDropEvent QList QSocketNotifier QTextList
QAccessibleWidget QDynamicPropertyChangeEvent QListIterator QSortFilterProxyModel QTextListFormat
QAction QErrorMessage QListView QSound QTextObject
QActionEvent QEvent QListWidget QSpacerItem QTextOption
QActionGroup QEventLoop QListWidgetItem QSpinBox QTextStream
QApplication QExtensionFactory QLocale QSplashScreen QTextTable
QAssistantClient QExtensionManager QMacPasteBoardMime QSplitter QTextTableCell
QAxAggregated QFile QMacStyle QSplitterHandle QTextTableFormat
QAxBase QFileDialog QMainWindow QSqlDatabase QThread
QAxBindable QFileIconProvider QMap QSqlDriver QThreadStorage
QAxFactory QFileInfo QMapIterator QSqlDriverCreator QTime
QAxObject QFileOpenEvent QMatrix QSqlDriverCreatorBase QTimeEdit
QAxScript QFileSystemWatcher QMenu QSqlDriverPlugin QTimeLine
QAxScriptEngine QFlag QMenuBar QSqlError QTimer
QAxScriptManager QFlags QMessageBox QSqlField QTimerEvent
QAxWidget QFocusEvent QMetaClassInfo QSqlIndex QToolBar
QBasicTimer QFocusFrame QMetaEnum QSqlQuery QToolBox
QBitArray QFont QMetaMethod QSqlQueryModel QToolButton
QBitmap QFontComboBox QMetaObject QSqlRecord QToolTip
QBoxLayout QFontDatabase QMetaProperty QSqlRelation QTransformedScreen
QBrush QFontDialog QMetaType QSqlRelationalDelegate QTranslator
QBuffer QFontInfo QMimeData QSqlRelationalTableModel QTreeView
QButtonGroup QFontMetrics QMimeSource QSqlResult QTreeWidget
QByteArray QFontMetricsF QModelIndex QSqlTableModel QTreeWidgetItem
QByteArrayMatcher QFormBuilder QMotifStyle QStack QTreeWidgetItemIterator
QCache QFrame QMouseDriverFactory QStackedLayout QUdpSocket
QCalendarWidget QFSFileEngine QMouseDriverPlugin QStackedWidget QUiLoader
QCDEStyle QFtp QMouseEvent QStandardItem QUndoCommand
QChar QGenericArgument QMoveEvent QStandardItemEditorCreator QUndoGroup
QCheckBox QGenericReturnArgument QMovie QStandardItemModel QUndoStack
QChildEvent QGLColormap QMultiHash QStatusBar QUndoView
QCleanlooksStyle QGLContext QMultiMap QStatusTipEvent QUrl
QClipboard QGLFormat QMutableHashIterator QString QUrlInfo
QCloseEvent QGLFramebufferObject QMutableLinkedListIterator QStringList QUuid
QColor QGLPixelBuffer QMutableListIterator QStringListModel QValidator
QColorDialog QGLWidget QMutableMapIterator QStringMatcher QVariant
QColormap QGradient QMutableSetIterator QStyle QVarLengthArray
QComboBox QGraphicsEllipseItem QMutableVectorIterator QStyleFactory QVBoxLayout
QCommonStyle QGraphicsItem QMutex QStyleHintReturn QVector
QCompleter QGraphicsItemAnimation QMutexLocker QStyleHintReturnMask QVectorIterator
QConicalGradient QGraphicsItemGroup QNetworkAddressEntry QStyleOption QVFbScreen
QContextMenuEvent QGraphicsLineItem QNetworkInterface QStyleOptionButton QVNCScreen
QCopChannel QGraphicsPathItem QNetworkProxy QStyleOptionComboBox QWaitCondition
QCoreApplication QGraphicsPixmapItem QObject QStyleOptionComplex QWhatsThis
QCursor QGraphicsPolygonItem QObjectCleanupHandler QStyleOptionDockWidget QWhatsThisClickedEvent
QDataStream QGraphicsRectItem QPageSetupDialog QStyleOptionFocusRect QWheelEvent
QDataWidgetMapper QGraphicsScene QPaintDevice QStyleOptionFrame QWidget
QDate QGraphicsSceneContextMenuEvent QPaintEngine QStyleOptionFrameV2 QWidgetAction
QDateEdit QGraphicsSceneEvent QPaintEngineState QStyleOptionGraphicsItem QWidgetItem
QDateTime QGraphicsSceneHoverEvent QPainter QStyleOptionGroupBox QWindowsMime
QDateTimeEdit QGraphicsSceneMouseEvent QPainterPath QStyleOptionHeader QWindowsStyle
QDBusAbstractAdaptor QGraphicsSceneWheelEvent QPainterPathStroker QStyleOptionMenuItem QWindowStateChangeEvent
QDBusAbstractInterface QGraphicsSimpleTextItem QPaintEvent QStyleOptionProgressBar QWindowsXPStyle
QDBusArgument QGraphicsSvgItem QPair QStyleOptionProgressBarV2 QWorkspace
QDBusConnection QGraphicsTextItem QPalette QStyleOptionQ3DockWindow QWriteLocker
QDBusConnectionInterface QGraphicsView QPen QStyleOptionQ3ListView QWSCalibratedMouseHandler
QDBusError QGridLayout QPersistentModelIndex QStyleOptionQ3ListViewItem QWSClient
QDBusInterface QGroupBox QPicture QStyleOptionRubberBand QWSEmbedWidget
QDBusMessage QHash QPictureFormatPlugin QStyleOptionSizeGrip QWSEvent
QDBusObjectPath QHashIterator QPictureIO QStyleOptionSlider QWSInputMethod
QDBusReply QHBoxLayout QPixmap QStyleOptionSpinBox QWSKeyboardHandler
QDBusServer QHeaderView QPixmapCache QStyleOptionTab QWSMouseHandler
QDBusSignature QHelpEvent QPlastiqueStyle QStyleOptionTabBarBase QWSPointerCalibrationData
QDBusVariant QHideEvent QPluginLoader QStyleOptionTabV2 QWSScreenSaver
QDecoration QHostAddress QPoint QStyleOptionTabWidgetFrame QWSServer
QDecorationFactory QHostInfo QPointer QStyleOptionTitleBar QWSTslibMouseHandler
QDecorationPlugin QHoverEvent QPointF QStyleOptionToolBar QWSWindow
QDesignerActionEditorInterface QHttp QPolygon QStyleOptionToolBox QWSWindowSurface
QDesignerContainerExtension QHttpHeader QPolygonF QStyleOptionToolButton QX11EmbedContainer
QDesignerCustomWidgetCollectionInterface QHttpRequestHeader QPrintDialog QStyleOptionViewItem QX11EmbedWidget
QDesignerCustomWidgetInterface QHttpResponseHeader QPrintEngine QStyleOptionViewItemV2 QX11Info
QDesignerFormEditorInterface QIcon QPrinter QStylePainter QXmlAttributes
QDesignerFormWindowCursorInterface QIconDragEvent QProcess QStylePlugin QXmlContentHandler
QDesignerFormWindowInterface QIconEngine QProgressBar QSvgRenderer QXmlDeclHandler
QDesignerFormWindowManagerInterface QIconEnginePlugin QProgressDialog QSvgWidget QXmlDefaultHandler
QDesignerMemberSheetExtension QImage QProxyModel QSyntaxHighlighter QXmlDTDHandler
QDesignerObjectInspectorInterface QImageIOHandler QPushButton QSysInfo QXmlEntityResolver
QDesignerPropertyEditorInterface QImageIOPlugin QQueue QSystemLocale QXmlErrorHandler
QDesignerPropertySheetExtension QImageReader QRadialGradient QSystemTrayIcon QXmlInputSource
QDesignerTaskMenuExtension QImageWriter QRadioButton QTabBar QXmlLexicalHandler
QDesignerWidgetBoxInterface QInputContext QReadLocker QTabletEvent QXmlLocator
QDesktopServices QInputContextFactory QReadWriteLock QTableView QXmlNamespaceSupport
QDesktopWidget QInputContextPlugin QRect QTableWidget QXmlParseException
QDial QInputDialog QRectF QTableWidgetItem QXmlReader
QDialog QInputEvent QRegExp QTableWidgetSelectionRange QXmlSimpleReader
QDialogButtonBox QInputMethodEvent QRegExpValidator QTabWidget
QDir QIntValidator QRegion QTcpServer

See also Qt 3 Compatibility Classes and Qt's Modules.


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Qt 4.2.0-rc1