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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 4.3 Class Chart (PDF).

QAbstractButton QDir QIntValidator QScreenCursor QTableWidgetSelectionRange
QAbstractEventDispatcher QDirectPainter QIODevice QScreenDriverFactory QTabWidget
QAbstractExtensionFactory QDirIterator QItemDelegate QScreenDriverPlugin QTcpServer
QAbstractExtensionManager QDirModel QItemEditorCreator QScriptable QTcpSocket
QAbstractFileEngine QDockWidget QItemEditorCreatorBase QScriptContext QTemporaryFile
QAbstractFileEngineHandler QDomAttr QItemEditorFactory QScriptEngine QTestEventList
QAbstractFileEngineIterator QDomCDATASection QItemSelection QScriptExtensionPlugin QTextBlock
QAbstractFontEngine QDomCharacterData QItemSelectionModel QScriptValue QTextBlockFormat
QAbstractFormBuilder QDomComment QItemSelectionRange QScriptValueIterator QTextBlockGroup
QAbstractGraphicsShapeItem QDomDocument QKbdDriverFactory QScrollArea QTextBlockUserData
QAbstractItemDelegate QDomDocumentFragment QKbdDriverPlugin QScrollBar QTextBrowser
QAbstractItemModel QDomDocumentType QKeyEvent QSemaphore QTextCharFormat
QAbstractItemView QDomElement QKeySequence QSessionManager QTextCodec
QAbstractListModel QDomEntity QLabel QSet QTextCodecPlugin
QAbstractPrintDialog QDomEntityReference QLatin1Char QSetIterator QTextCursor
QAbstractProxyModel QDomImplementation QLatin1String QSettings QTextDecoder
QAbstractScrollArea QDomNamedNodeMap QLayout QSharedData QTextDocument
QAbstractSlider QDomNode QLayoutItem QSharedDataPointer QTextDocumentFragment
QAbstractSocket QDomNodeList QLCDNumber QShortcut QTextEdit
QAbstractSpinBox QDomNotation QLibrary QShortcutEvent QTextEncoder
QAbstractTableModel QDomProcessingInstruction QLibraryInfo QShowEvent QTextFormat
QAbstractTextDocumentLayout QDomText QLine QSignalMapper QTextFragment
QAccessible QDoubleSpinBox QLinearGradient QSignalSpy QTextFrame
QAccessibleBridge QDoubleValidator QLineEdit QSize QTextFrameFormat
QAccessibleBridgePlugin QDrag QLineF QSizeF QTextImageFormat
QAccessibleEvent QDragEnterEvent QLinkedList QSizeGrip QTextInlineObject
QAccessibleInterface QDragLeaveEvent QLinkedListIterator QSizePolicy QTextLayout
QAccessibleObject QDragMoveEvent QList QSlider QTextLength
QAccessiblePlugin QDropEvent QListIterator QSocketNotifier QTextLine
QAccessibleWidget QDynamicPropertyChangeEvent QListView QSortFilterProxyModel QTextList
QAction QErrorMessage QListWidget QSound QTextListFormat
QActionEvent QEvent QListWidgetItem QSpacerItem QTextObject
QActionGroup QEventLoop QLocale QSpinBox QTextOption
QApplication QExtensionFactory QMacPasteboardMime QSplashScreen QTextStream
QAssistantClient QExtensionManager QMacStyle QSplitter QTextTable
QAuthenticator QFile QMainWindow QSplitterHandle QTextTableCell
QAxAggregated QFileDialog QMap QSqlDatabase QTextTableFormat
QAxBase QFileIconProvider QMapIterator QSqlDriver QThread
QAxBindable QFileInfo QMatrix QSqlDriverCreator QThreadStorage
QAxFactory QFileOpenEvent QMdiArea QSqlDriverCreatorBase QTime
QAxObject QFileSystemWatcher QMdiSubWindow QSqlDriverPlugin QTimeEdit
QAxScript QFlag QMenu QSqlError QTimeLine
QAxScriptEngine QFlags QMenuBar QSqlField QTimer
QAxScriptManager QFocusEvent QMessageBox QSqlIndex QTimerEvent
QAxWidget QFocusFrame QMetaClassInfo QSqlQuery QToolBar
QBasicTimer QFont QMetaEnum QSqlQueryModel QToolBox
QBitArray QFontComboBox QMetaMethod QSqlRecord QToolButton
QBitmap QFontDatabase QMetaObject QSqlRelation QToolTip
QBoxLayout QFontDialog QMetaProperty QSqlRelationalDelegate QTransform
QBrush QFontEngineInfo QMetaType QSqlRelationalTableModel QTranslator
QBuffer QFontEnginePlugin QMimeData QSqlResult QTreeView
QButtonGroup QFontInfo QMimeSource QSqlTableModel QTreeWidget
QByteArray QFontMetrics QModelIndex QSslCertificate QTreeWidgetItem
QByteArrayMatcher QFontMetricsF QMotifStyle QSslCipher QTreeWidgetItemIterator
QCache QFormBuilder QMouseDriverFactory QSslError QUdpSocket
QCalendarWidget QFrame QMouseDriverPlugin QSslKey QUiLoader
QCDEStyle QFSFileEngine QMouseEvent QSslSocket QUndoCommand
QChar QFtp QMoveEvent QStack QUndoGroup
QCheckBox QGenericArgument QMovie QStackedLayout QUndoStack
QChildEvent QGenericReturnArgument QMultiHash QStackedWidget QUndoView
QCleanlooksStyle QGLColormap QMultiMap QStandardItem QUrl
QClipboard QGLContext QMutableHashIterator QStandardItemEditorCreator QUrlInfo
QCloseEvent QGLFormat QMutableLinkedListIterator QStandardItemModel QUuid
QColor QGLFramebufferObject QMutableListIterator QStatusBar QValidator
QColorDialog QGLPixelBuffer QMutableMapIterator QStatusTipEvent QVariant
QColormap QGLWidget QMutableSetIterator QString QVarLengthArray
QColumnView QGLWindowSurface QMutableVectorIterator QStringList QVBoxLayout
QComboBox QGradient QMutex QStringListModel QVector
QCommonStyle QGraphicsEllipseItem QMutexLocker QStringMatcher QVectorIterator
QCompleter QGraphicsItem QNetworkAddressEntry QStringRef QVNCScreen
QConicalGradient QGraphicsItemAnimation QNetworkInterface QStyle QWaitCondition
QContextMenuEvent QGraphicsItemGroup QNetworkProxy QStyleFactory QWhatsThis
QCopChannel QGraphicsLineItem QObject QStyleHintReturn QWhatsThisClickedEvent
QCoreApplication QGraphicsPathItem QObjectCleanupHandler QStyleHintReturnMask QWheelEvent
QCryptographicHash QGraphicsPixmapItem QPageSetupDialog QStyleHintReturnVariant QWidget
QCursor QGraphicsPolygonItem QPaintDevice QStyleOption QWidgetAction
QCustomRasterPaintDevice QGraphicsRectItem QPaintEngine QStyleOptionButton QWidgetItem
QDataStream QGraphicsScene QPaintEngineState QStyleOptionComboBox QWindowsMime
QDataWidgetMapper QGraphicsSceneContextMenuEvent QPainter QStyleOptionComplex QWindowsStyle
QDate QGraphicsSceneDragDropEvent QPainterPath QStyleOptionDockWidget QWindowStateChangeEvent
QDateEdit QGraphicsSceneEvent QPainterPathStroker QStyleOptionFocusRect QWindowsVistaStyle
QDateTime QGraphicsSceneHelpEvent QPaintEvent QStyleOptionFrame QWindowsXPStyle
QDateTimeEdit QGraphicsSceneHoverEvent QPair QStyleOptionFrameV2 QWizard
QDBusAbstractAdaptor QGraphicsSceneMouseEvent QPalette QStyleOptionGraphicsItem QWizardPage
QDBusAbstractInterface QGraphicsSceneWheelEvent QPen QStyleOptionGroupBox QWorkspace
QDBusArgument QGraphicsSimpleTextItem QPersistentModelIndex QStyleOptionHeader QWriteLocker
QDBusConnection QGraphicsSvgItem QPicture QStyleOptionMenuItem QWSCalibratedMouseHandler
QDBusConnectionInterface QGraphicsTextItem QPictureFormatPlugin QStyleOptionProgressBar QWSClient
QDBusContext QGraphicsView QPictureIO QStyleOptionProgressBarV2 QWSEmbedWidget
QDBusError QGridLayout QPixmap QStyleOptionQ3DockWindow QWSEvent
QDBusInterface QGroupBox QPixmapCache QStyleOptionQ3ListView QWSInputMethod
QDBusMessage QHash QPlastiqueStyle QStyleOptionQ3ListViewItem QWSKeyboardHandler
QDBusObjectPath QHashIterator QPluginLoader QStyleOptionRubberBand QWSMouseHandler
QDBusReply QHBoxLayout QPoint QStyleOptionSizeGrip QWSPointerCalibrationData
QDBusServer QHeaderView QPointer QStyleOptionSlider QWSScreenSaver
QDBusSignature QHelpEvent QPointF QStyleOptionSpinBox QWSServer
QDBusVariant QHideEvent QPolygon QStyleOptionTab QWSWindow
QDecoration QHostAddress QPolygonF QStyleOptionTabBarBase QX11EmbedContainer
QDecorationFactory QHostInfo QPrintDialog QStyleOptionTabV2 QX11EmbedWidget
QDecorationPlugin QHoverEvent QPrintEngine QStyleOptionTabWidgetFrame QX11Info
QDesignerActionEditorInterface QHttp QPrinter QStyleOptionTitleBar QXmlAttributes
QDesignerContainerExtension QHttpHeader QProcess QStyleOptionToolBar QXmlContentHandler
QDesignerCustomWidgetCollectionInterface QHttpRequestHeader QProgressBar QStyleOptionToolBox QXmlDeclHandler
QDesignerCustomWidgetInterface QHttpResponseHeader QProgressDialog QStyleOptionToolBoxV2 QXmlDefaultHandler
QDesignerDynamicPropertySheetExtension QIcon QProxyModel QStyleOptionToolButton QXmlDTDHandler
QDesignerFormEditorInterface QIconDragEvent QPushButton QStyleOptionViewItem QXmlEntityResolver
QDesignerFormWindowCursorInterface QIconEngine QQueue QStyleOptionViewItemV2 QXmlErrorHandler
QDesignerFormWindowInterface QIconEnginePlugin QRadialGradient QStylePainter QXmlInputSource
QDesignerFormWindowManagerInterface QIconEnginePluginV2 QRadioButton QStylePlugin QXmlLexicalHandler
QDesignerMemberSheetExtension QIconEngineV2 QRasterPaintEngine QSvgGenerator QXmlLocator
QDesignerObjectInspectorInterface QImage QReadLocker QSvgRenderer QXmlNamespaceSupport
QDesignerPropertyEditorInterface QImageIOHandler QReadWriteLock QSvgWidget QXmlParseException
QDesignerPropertySheetExtension QImageIOPlugin QRect QSyntaxHighlighter QXmlReader
QDesignerScriptExtension QImageReader QRectF QSysInfo QXmlSimpleReader
QDesignerTaskMenuExtension QImageWriter QRegExp QSystemLocale QXmlStreamAttribute
QDesignerWidgetBoxInterface QInputContext QRegExpValidator QSystemTrayIcon QXmlStreamAttributes
QDesktopServices QInputContextFactory QRegion QTabBar QXmlStreamEntityDeclaration
QDesktopWidget QInputContextPlugin QResizeEvent QTabletEvent QXmlStreamNamespaceDeclaration
QDial QInputDialog QResource QTableView QXmlStreamNotationDeclaration
QDialog QInputEvent QRubberBand QTableWidget QXmlStreamReader
QDialogButtonBox QInputMethodEvent QScreen QTableWidgetItem QXmlStreamWriter

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


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Qt 4.3.0rc1