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

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


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Qt 4.2.3