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

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


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Qt 4.3.0