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

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


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Qt 4.3.0-snapshot-20070202