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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).

A  QAbstractButton QFlag QMutex QStyleOptionTab
QAbstractEventDispatcher QFlags QMutexLocker QStyleOptionTabBarBase
QAbstractExtensionFactory QFocusEvent N  QNetworkAccessManager QStyleOptionTabV2
QAbstractExtensionManager QFocusFrame QNetworkAddressEntry QStyleOptionTabWidgetFrame
QAbstractFileEngine QFont QNetworkCookie QStyleOptionTitleBar
QAbstractFileEngineHandler QFontComboBox QNetworkCookieJar QStyleOptionToolBar
QAbstractFileEngineIterator QFontDatabase QNetworkInterface QStyleOptionToolBox
QAbstractFontEngine QFontDialog QNetworkProxy QStyleOptionToolBoxV2
QAbstractFormBuilder QFontEngineInfo QNetworkReply QStyleOptionToolButton
QAbstractGraphicsShapeItem QFontEnginePlugin QNetworkRequest QStyleOptionViewItem
QAbstractItemDelegate QFontInfo Notifier (Phonon::BackendCapabilities) QStyleOptionViewItemV2
QAbstractItemModel QFontMetrics O  QObject QStyleOptionViewItemV4
QAbstractItemView QFontMetricsF QObjectCleanupHandler QStylePainter
QAbstractListModel QFormBuilder ObjectDescription (Phonon) QStylePlugin
QAbstractMessageHandler QFormLayout P  QPageSetupDialog QSvgGenerator
QAbstractPrintDialog QFrame QPaintDevice QSvgRenderer
QAbstractProxyModel QFSFileEngine QPaintEngine QSvgWidget
QAbstractScrollArea QFtp QPaintEngineState QSyntaxHighlighter
QAbstractSlider QFuture QPainter QSysInfo
QAbstractSocket QFutureIterator QPainterPath QSystemLocale
QAbstractSpinBox QFutureSynchronizer QPainterPathStroker QSystemSemaphore
QAbstractTableModel QFutureWatcher QPaintEvent QSystemTrayIcon
QAbstractTextDocumentLayout G  QGenericArgument QPair T  QTabBar
QAbstractUriResolver QGenericReturnArgument QPalette QTabletEvent
QAbstractXmlNodeModel QGLColormap Path (Phonon) QTableView
QAbstractXmlReceiver QGLContext QPen QTableWidget
QAccessible QGLFormat QPersistentModelIndex QTableWidgetItem
QAccessibleBridge QGLFramebufferObject QPicture QTableWidgetSelectionRange
QAccessibleBridgePlugin GlobalConfig (Phonon) QPictureFormatPlugin QTabWidget
QAccessibleEvent QGLPixelBuffer QPictureIO QTcpServer
QAccessibleInterface QGLWidget QPixmap QTcpSocket
QAccessibleObject QGradient QPixmapCache QTemporaryFile
QAccessiblePlugin QGraphicsEllipseItem QPlainTextDocumentLayout QTestEventList
QAccessibleWidget QGraphicsGridLayout QPlainTextEdit QTextBlock
QAction QGraphicsItem QPlastiqueStyle QTextBlockFormat
QActionEvent QGraphicsItemAnimation QPluginLoader QTextBlockGroup
QActionGroup QGraphicsItemGroup QPoint QTextBlockUserData
QApplication QGraphicsLayout QPointer QTextBoundaryFinder
QAssistantClient QGraphicsLayoutItem QPointF QTextBrowser
QAtomicInt QGraphicsLinearLayout QPolygon QTextCharFormat
QAtomicPointer QGraphicsLineItem QPolygonF QTextCodec
AudioOutput (Phonon) QGraphicsPathItem QPrintDialog QTextCodecPlugin
QAuthenticator QGraphicsPixmapItem QPrintEngine QTextCursor
QAxAggregated QGraphicsPolygonItem QPrinter QTextDecoder
QAxBase QGraphicsProxyWidget QPrinterInfo QTextDocument
QAxBindable QGraphicsRectItem QPrintPreviewDialog QTextDocumentFragment
QAxFactory QGraphicsScene QPrintPreviewWidget QTextEdit
QAxObject QGraphicsSceneContextMenuEvent QProcess QTextEncoder
QAxScript QGraphicsSceneDragDropEvent QProgressBar QTextFormat
QAxScriptEngine QGraphicsSceneEvent QProgressDialog QTextFragment
QAxScriptManager QGraphicsSceneHelpEvent QProxyModel QTextFrame
QAxWidget QGraphicsSceneHoverEvent QProxyScreen QTextFrameFormat
B  QBasicTimer QGraphicsSceneMouseEvent QPushButton QTextImageFormat
QBitArray QGraphicsSceneMoveEvent Q  QQueue QTextInlineObject
QBitmap QGraphicsSceneResizeEvent R  QRadialGradient QTextLayout
QBoxLayout QGraphicsSceneWheelEvent QRadioButton QTextLength
QBrush QGraphicsSimpleTextItem QRasterPaintEngine QTextLine
QBuffer QGraphicsSvgItem QReadLocker QTextList
QButtonGroup QGraphicsTextItem QReadWriteLock QTextListFormat
QByteArray QGraphicsView QRect QTextObject
QByteArrayMatcher QGraphicsWidget QRectF QTextOption
C  QCache QGridLayout QRegExp QTextStream
QCalendarWidget QGroupBox QRegExpValidator QTextTable
QCDEStyle H  QHash QRegion QTextTableCell
QChar QHashIterator QResizeEvent QTextTableCellFormat
QCheckBox QHBoxLayout QResource QTextTableFormat
QChildEvent QHeaderView QRubberBand QThread
QCleanlooksStyle QHelpContentItem QRunnable QThreadPool
QClipboard QHelpContentModel S  QScreen QThreadStorage
QCloseEvent QHelpContentWidget QScreenCursor QtIcoHandler
QColor QHelpEngine QScreenDriverFactory QTime
QColorDialog QHelpEngineCore QScreenDriverPlugin QTimeEdit
QColormap QHelpEvent QScriptable QTimeLine
QColumnView QHelpIndexModel QScriptClass QTimer
QComboBox QHelpIndexWidget QScriptClassPropertyIterator QTimerEvent
QCommandLinkButton QHelpSearchEngine QScriptContext QToolBar
QCommonStyle QHelpSearchQuery QScriptContextInfo QToolBox
QCompleter QHelpSearchQueryWidget QScriptEngine QToolButton
QConicalGradient QHelpSearchResultWidget QScriptEngineAgent QToolTip
QContextMenuEvent QHideEvent QScriptExtensionPlugin QTransform
QCopChannel QHostAddress QScriptString QTranslator
QCoreApplication QHostInfo QScriptValue QTreeView
QCryptographicHash QHoverEvent QScriptValueIterator QTreeWidget
QCursor QHttp QScrollArea QTreeWidgetItem
QCustomRasterPaintDevice QHttpHeader QScrollBar QTreeWidgetItemIterator
D  QDataStream QHttpRequestHeader SeekSlider (Phonon) U  QUdpSocket
QDataWidgetMapper QHttpResponseHeader QSemaphore QUiLoader
QDate I  QIcon QSessionManager QUndoCommand
QDateEdit QIconDragEvent QSet QUndoGroup
QDateTime QIconEngine QSetIterator QUndoStack
QDateTimeEdit QIconEnginePlugin QSettings QUndoView
QDBusAbstractAdaptor QIconEnginePluginV2 QSharedData UnhandledException (QtConcurrent)
QDBusAbstractInterface QIconEngineV2 QSharedDataPointer QUrl
QDBusArgument QImage QSharedMemory QUrlInfo
QDBusConnection QImageIOHandler QShortcut QUuid
QDBusConnectionInterface QImageIOPlugin QShortcutEvent V  QValidator
QDBusContext QImageReader QShowEvent QVariant
QDBusError QImageWriter QSignalMapper QVarLengthArray
QDBusInterface QInputContext QSignalSpy QVBoxLayout
QDBusMessage QInputContextFactory QSimpleXmlNodeModel QVector
QDBusObjectPath QInputContextPlugin QSize QVectorIterator
QDBusReply QInputDialog QSizeF VideoPlayer (Phonon)
QDBusServer QInputEvent QSizeGrip VideoWidget (Phonon)
QDBusSignature QInputMethodEvent QSizePolicy VolumeSlider (Phonon)
QDBusVariant QIntValidator QSlider W  QWaitCondition
QDecoration QIODevice QSocketNotifier QWebFrame
QDecorationDefault QItemDelegate QSortFilterProxyModel QWebHistory
QDecorationFactory QItemEditorCreator QSound QWebHistoryInterface
QDecorationPlugin QItemEditorCreatorBase QSourceLocation QWebHistoryItem
QDesignerActionEditorInterface QItemEditorFactory QSpacerItem QWebHitTestResult
QDesignerContainerExtension QItemSelection QSpinBox QWebPage
QDesignerCustomWidgetCollectionInterface QItemSelectionModel QSplashScreen QWebPluginFactory
QDesignerCustomWidgetInterface QItemSelectionRange QSplitter QWebSettings
QDesignerDynamicPropertySheetExtension K  QKbdDriverFactory QSplitterHandle QWebView
QDesignerFormEditorInterface QKbdDriverPlugin QSqlDatabase QWhatsThis
QDesignerFormWindowCursorInterface QKeyEvent QSqlDriver QWhatsThisClickedEvent
QDesignerFormWindowInterface QKeySequence QSqlDriverCreator QWheelEvent
QDesignerFormWindowManagerInterface L  QLabel QSqlDriverCreatorBase QWidget
QDesignerMemberSheetExtension QLatin1Char QSqlDriverPlugin QWidgetAction
QDesignerObjectInspectorInterface QLatin1String QSqlError QWidgetItem
QDesignerPropertyEditorInterface QLayout QSqlField QWindowsMime
QDesignerPropertySheetExtension QLayoutItem QSqlIndex QWindowsStyle
QDesignerTaskMenuExtension QLCDNumber QSqlQuery QWindowStateChangeEvent
QDesignerWidgetBoxInterface QLibrary QSqlQueryModel QWindowsVistaStyle
QDesktopServices QLibraryInfo QSqlRecord QWindowsXPStyle
QDesktopWidget QLine QSqlRelation QWizard
QDial QLinearGradient QSqlRelationalDelegate QWizardPage
QDialog QLineEdit QSqlRelationalTableModel QWorkspace
QDialogButtonBox QLineF QSqlResult QWriteLocker
QDir QLinkedList QSqlTableModel QWSCalibratedMouseHandler
QDirectPainter QLinkedListIterator QSslCertificate QWSClient
QDirIterator QList QSslCipher QWSEmbedWidget
QDirModel QListIterator QSslConfiguration QWSEvent
QDockWidget QListView QSslError QWSGLWindowSurface
QDomAttr QListWidget QSslKey QWSInputMethod
QDomCDATASection QListWidgetItem QSslSocket QWSKeyboardHandler
QDomCharacterData QLocale QStack QWSMouseHandler
QDomComment QLocalServer QStackedLayout QWSPointerCalibrationData
QDomDocument QLocalSocket QStackedWidget QWSScreenSaver
QDomDocumentFragment M  QMacPasteboardMime QStandardItem QWSServer
QDomDocumentType QMacStyle QStandardItemEditorCreator QWSWindow
QDomElement QMainWindow QStandardItemModel X  QX11EmbedContainer
QDomEntity QMap QStatusBar QX11EmbedWidget
QDomEntityReference QMapIterator QStatusTipEvent QX11Info
QDomImplementation QMatrix QString QXmlAttributes
QDomNamedNodeMap QMdiArea QStringList QXmlContentHandler
QDomNode QMdiSubWindow QStringListModel QXmlDeclHandler
QDomNodeList MediaNode (Phonon) QStringMatcher QXmlDefaultHandler
QDomNotation MediaObject (Phonon) QStringRef QXmlDTDHandler
QDomProcessingInstruction MediaSource (Phonon) QStyle QXmlEntityResolver
QDomText QMenu QStyledItemDelegate QXmlErrorHandler
QDoubleSpinBox QMenuBar QStyleFactory QXmlFormatter
QDoubleValidator QMessageBox QStyleHintReturn QXmlInputSource
QDrag QMetaClassInfo QStyleHintReturnMask QXmlItem
QDragEnterEvent QMetaEnum QStyleHintReturnVariant QXmlLexicalHandler
QDragLeaveEvent QMetaMethod QStyleOption QXmlLocator
QDragMoveEvent QMetaObject QStyleOptionButton QXmlName
QDropEvent QMetaProperty QStyleOptionComboBox QXmlNamePool
QDynamicPropertyChangeEvent QMetaType QStyleOptionComplex QXmlNamespaceSupport
E  Effect (Phonon) QMimeData QStyleOptionDockWidget QXmlNodeModelIndex
EffectParameter (Phonon) QMimeSource QStyleOptionFocusRect QXmlParseException
EffectWidget (Phonon) QModelIndex QStyleOptionFrame QXmlQuery
QErrorMessage QMotifStyle QStyleOptionFrameV2 QXmlReader
QEvent QMouseDriverFactory QStyleOptionGraphicsItem QXmlResultItems
QEventLoop QMouseDriverPlugin QStyleOptionGroupBox QXmlSerializer
Exception (QtConcurrent) QMouseEvent QStyleOptionHeader QXmlSimpleReader
QExplicitlySharedDataPointer QMoveEvent QStyleOptionMenuItem QXmlStreamAttribute
QExtensionFactory QMovie QStyleOptionProgressBar QXmlStreamAttributes
QExtensionManager QMultiHash QStyleOptionProgressBarV2 QXmlStreamEntityDeclaration
F  QFile QMultiMap QStyleOptionQ3DockWindow QXmlStreamEntityResolver
QFileDialog QMutableHashIterator QStyleOptionQ3ListView QXmlStreamNamespaceDeclaration
QFileIconProvider QMutableLinkedListIterator QStyleOptionQ3ListViewItem QXmlStreamNotationDeclaration
QFileInfo QMutableListIterator QStyleOptionRubberBand QXmlStreamReader
QFileOpenEvent QMutableMapIterator QStyleOptionSizeGrip QXmlStreamWriter
QFileSystemModel QMutableSetIterator QStyleOptionSlider
QFileSystemWatcher QMutableVectorIterator QStyleOptionSpinBox

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

Copyright © 2008 Trolltech Trademarks
Qt 4.4.0