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

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

Copyright © 2008 Trolltech Trademarks
Qt 4.4.0