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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 QFontDatabase QNetworkDiskCache QStyleOptionQ3ListViewItem
QAbstractEventDispatcher QFontDialog QNetworkInterface QStyleOptionRubberBand
QAbstractExtensionFactory QFontInfo QNetworkProxy QStyleOptionSizeGrip
QAbstractExtensionManager QFontMetrics QNetworkProxyFactory QStyleOptionSlider
QAbstractFileEngine QFontMetricsF QNetworkProxyQuery QStyleOptionSpinBox
QAbstractFileEngineHandler QFormBuilder QNetworkReply QStyleOptionTab
QAbstractFileEngineIterator QFormLayout QNetworkRequest QStyleOptionTabBarBase
QAbstractFormBuilder QFrame Notifier (Phonon::BackendCapabilities) QStyleOptionTabBarBaseV2
QAbstractGraphicsShapeItem QFSFileEngine QObject QStyleOptionTabV2
QAbstractItemDelegate QFtp QObjectCleanupHandler QStyleOptionTabV3
QAbstractItemModel QFuture ObjectDescription (Phonon) QStyleOptionTabWidgetFrame
QAbstractItemView QFutureIterator QPaintDevice QStyleOptionTitleBar
QAbstractListModel QFutureSynchronizer QPaintEngine QStyleOptionToolBar
QAbstractMessageHandler QFutureWatcher QPaintEngineState QStyleOptionToolBox
QAbstractNetworkCache QGenericArgument QPainter QStyleOptionToolBoxV2
QAbstractPrintDialog QGenericReturnArgument QPainterPath QStyleOptionToolButton
QAbstractProxyModel QGLColormap QPainterPathStroker QStyleOptionViewItem
QAbstractScrollArea QGLContext QPaintEvent QStyleOptionViewItemV2
QAbstractSlider QGLFormat QPair QStyleOptionViewItemV4
QAbstractSocket QGLFramebufferObject QPalette QStylePainter
QAbstractSpinBox QGLPixelBuffer Path (Phonon) QStylePlugin
QAbstractTableModel QGLWidget QPen QSvgGenerator
QAbstractTextDocumentLayout QGradient QPersistentModelIndex QSvgRenderer
QAbstractUriResolver QGraphicsEllipseItem QPicture QSvgWidget
QAbstractXmlNodeModel QGraphicsGridLayout QPictureFormatPlugin QSyntaxHighlighter
QAbstractXmlReceiver QGraphicsItem QPictureIO QSysInfo
QAccessible QGraphicsItemAnimation QPixmap QSystemLocale
QAccessibleBridge QGraphicsItemGroup QPixmapCache QSystemSemaphore
QAccessibleBridgePlugin QGraphicsLayout QPixmapColorizeFilter QSystemTrayIcon
QAccessibleEvent QGraphicsLayoutItem QPixmapConvolutionFilter QTabBar
QAccessibleInterface QGraphicsLinearLayout QPixmapDropShadowFilter QTabletEvent
QAccessibleObject QGraphicsLineItem QPixmapFilter QTableView
QAccessiblePlugin QGraphicsPathItem QPlainTextDocumentLayout QTableWidget
QAccessibleWidget QGraphicsPixmapItem QPlainTextEdit QTableWidgetItem
QAction QGraphicsPolygonItem QPlastiqueStyle QTableWidgetSelectionRange
QActionEvent QGraphicsProxyWidget QPluginLoader QTabWidget
QActionGroup QGraphicsRectItem QPoint QTcpServer
QApplication QGraphicsScene QPointer QTcpSocket
QAssistantClient QGraphicsSceneContextMenuEvent QPointF QTemporaryFile
QAtomicInt QGraphicsSceneDragDropEvent QPolygon QTestEventList
QAtomicPointer QGraphicsSceneEvent QPolygonF QTextBlock
AudioOutput (Phonon) QGraphicsSceneHelpEvent QPrintDialog QTextBlockFormat
QAuthenticator QGraphicsSceneHoverEvent QPrintEngine QTextBlockGroup
QBasicTimer QGraphicsSceneMouseEvent QPrinter QTextBlockUserData
QBitArray QGraphicsSceneMoveEvent QPrinterInfo QTextBoundaryFinder
QBitmap QGraphicsSceneResizeEvent QPrintPreviewDialog QTextBrowser
QBoxLayout QGraphicsSceneWheelEvent QPrintPreviewWidget QTextCharFormat
QBrush QGraphicsSimpleTextItem QProcess QTextCodec
QBuffer QGraphicsSvgItem QProgressBar QTextCodecPlugin
QButtonGroup QGraphicsTextItem QProgressDialog QTextCursor
QByteArray QGraphicsView QProxyModel QTextDecoder
QByteArrayMatcher QGraphicsWidget QPushButton QTextDocument
QCache QGridLayout QQueue QTextDocumentFragment
QCalendarWidget QGroupBox QRadialGradient QTextDocumentWriter
QCDEStyle QGtkStyle QRadioButton QTextEdit
QChar QHash QRasterPaintEngine QTextEncoder
QCheckBox QHashIterator QReadLocker QTextFormat
QChildEvent QHBoxLayout QReadWriteLock QTextFragment
QCleanlooksStyle QHeaderView QRect QTextFrame
QClipboard QHelpContentItem QRectF QTextFrameFormat
QCloseEvent QHelpContentModel QRegExp QTextImageFormat
QColor QHelpContentWidget QRegExpValidator QTextInlineObject
QColorDialog QHelpEngine QRegion QTextItem
QColormap QHelpEngineCore QResizeEvent QTextLayout
QColumnView QHelpEvent QResource QTextLength
QComboBox QHelpIndexModel QRubberBand QTextLine
QCommandLinkButton QHelpIndexWidget QRunnable QTextList
QCommonStyle QHelpSearchEngine QScriptable QTextListFormat
QCompleter QHelpSearchQuery QScriptClass QTextObject
QConicalGradient QHelpSearchQueryWidget QScriptClassPropertyIterator QTextOption
QContextMenuEvent QHelpSearchResultWidget QScriptContext QTextStream
QCoreApplication QHideEvent QScriptContextInfo QTextTable
QCryptographicHash QHostAddress QScriptEngine QTextTableCell
QCursor QHostInfo QScriptEngineAgent QTextTableCellFormat
QCustomRasterPaintDevice QHoverEvent QScriptEngineDebugger QTextTableFormat
QDataStream QHttp QScriptExtensionPlugin QThread
QDataWidgetMapper QHttpHeader QScriptString QThreadPool
QDate QHttpRequestHeader QScriptSyntaxCheckResult QThreadStorage
QDateEdit QHttpResponseHeader QScriptValue QTime
QDateTime QIcon QScriptValueIterator QTimeEdit
QDateTimeEdit QIconDragEvent QScrollArea QTimeLine
QDBusAbstractAdaptor QIconEngine QScrollBar QTimer
QDBusAbstractInterface QIconEnginePlugin SeekSlider (Phonon) QTimerEvent
QDBusArgument QIconEnginePluginV2 QSemaphore QToolBar
QDBusConnection QIconEngineV2 QSessionManager QToolBox
QDBusConnectionInterface QImage QSet QToolButton
QDBusContext QImageIOHandler QSetIterator QToolTip
QDBusError QImageIOPlugin QSettings QTransform
QDBusInterface QImageReader QSharedData QTranslator
QDBusMessage QImageWriter QSharedDataPointer QTreeView
QDBusObjectPath QInputContext QSharedMemory QTreeWidget
QDBusPendingCall QInputContextFactory QSharedPointer QTreeWidgetItem
QDBusPendingCallWatcher QInputContextPlugin QShortcut QTreeWidgetItemIterator
QDBusPendingReply QInputDialog QShortcutEvent QUdpSocket
QDBusReply QInputEvent QShowEvent QUiLoader
QDBusServer QInputMethodEvent QSignalMapper QUndoCommand
QDBusSignature QIntValidator QSignalSpy QUndoGroup
QDBusVariant QIODevice QSimpleXmlNodeModel QUndoStack
QDesignerActionEditorInterface QItemDelegate QSize QUndoView
QDesignerContainerExtension QItemEditorCreator QSizeF UnhandledException (QtConcurrent)
QDesignerCustomWidgetCollectionInterface QItemEditorCreatorBase QSizeGrip QUrl
QDesignerCustomWidgetInterface QItemEditorFactory QSizePolicy QUrlInfo
QDesignerDynamicPropertySheetExtension QItemSelection QSlider QUuid
QDesignerFormEditorInterface QItemSelectionModel QSocketNotifier QValidator
QDesignerFormWindowCursorInterface QItemSelectionRange QSortFilterProxyModel QVariant
QDesignerFormWindowInterface QKeyEvent QSound QVarLengthArray
QDesignerFormWindowManagerInterface QKeySequence QSourceLocation QVBoxLayout
QDesignerMemberSheetExtension QLabel QSpacerItem QVector
QDesignerObjectInspectorInterface QLatin1Char QSpinBox QVectorIterator
QDesignerPropertyEditorInterface QLatin1String QSplashScreen VideoPlayer (Phonon)
QDesignerPropertySheetExtension QLayout QSplitter VideoWidget (Phonon)
QDesignerTaskMenuExtension QLayoutItem QSplitterHandle VolumeSlider (Phonon)
QDesignerWidgetBoxInterface QLCDNumber QSqlDatabase QWaitCondition
QDesktopServices QLibrary QSqlDriver QWeakPointer
QDesktopWidget QLibraryInfo QSqlDriverCreator QWebDatabase
QDial QLine QSqlDriverCreatorBase QWebFrame
QDialog QLinearGradient QSqlDriverPlugin QWebHistory
QDialogButtonBox QLineEdit QSqlError QWebHistoryInterface
QDir QLineF QSqlField QWebHistoryItem
QDirIterator QLinkedList QSqlIndex QWebHitTestResult
QDirModel QLinkedListIterator QSqlQuery QWebPage
QDockWidget QList QSqlQueryModel QWebPluginFactory
QDomAttr QListIterator QSqlRecord QWebSecurityOrigin
QDomCDATASection QListView QSqlRelation QWebSettings
QDomCharacterData QListWidget QSqlRelationalDelegate QWebView
QDomComment QListWidgetItem QSqlRelationalTableModel QWhatsThis
QDomDocument QLocale QSqlResult QWhatsThisClickedEvent
QDomDocumentFragment QLocalServer QSqlTableModel QWheelEvent
QDomDocumentType QLocalSocket QSslCertificate QWidget
QDomElement QMainWindow QSslCipher QWidgetAction
QDomEntity QMap QSslConfiguration QWidgetItem
QDomEntityReference QMapIterator QSslError QWindowsMime
QDomImplementation QMatrix QSslKey QWindowsStyle
QDomNamedNodeMap QMdiArea QSslSocket QWindowStateChangeEvent
QDomNode QMdiSubWindow QStack QWindowsVistaStyle
QDomNodeList MediaController (Phonon) QStackedLayout QWindowsXPStyle
QDomNotation MediaNode (Phonon) QStackedWidget QWizard
QDomProcessingInstruction MediaObject (Phonon) QStandardItem QWizardPage
QDomText MediaSource (Phonon) QStandardItemEditorCreator QWorkspace
QDoubleSpinBox QMenu QStandardItemModel QWriteLocker
QDoubleValidator QMenuBar QStatusBar QXmlAttributes
QDrag QMessageBox QStatusTipEvent QXmlContentHandler
QDragEnterEvent QMetaClassInfo QString QXmlDeclHandler
QDragLeaveEvent QMetaEnum QStringList QXmlDefaultHandler
QDragMoveEvent QMetaMethod QStringListModel QXmlDTDHandler
QDropEvent QMetaObject QStringMatcher QXmlEntityResolver
QDynamicPropertyChangeEvent QMetaProperty QStringRef QXmlErrorHandler
Effect (Phonon) QMetaType QStyle QXmlFormatter
EffectParameter (Phonon) QMimeData QStyledItemDelegate QXmlInputSource
EffectWidget (Phonon) QMimeSource QStyleFactory QXmlItem
QErrorMessage QModelIndex QStyleHintReturn QXmlLexicalHandler
QEvent QMotifStyle QStyleHintReturnMask QXmlLocator
QEventLoop QMouseEvent QStyleHintReturnVariant QXmlName
Exception (QtConcurrent) QMoveEvent QStyleOption QXmlNamePool
QExplicitlySharedDataPointer QMovie QStyleOptionButton QXmlNamespaceSupport
QExtensionFactory QMultiHash QStyleOptionComboBox QXmlNodeModelIndex
QExtensionManager QMultiMap QStyleOptionComplex QXmlParseException
QFile QMutableHashIterator QStyleOptionDockWidget QXmlQuery
QFileDialog QMutableLinkedListIterator QStyleOptionFocusRect QXmlReader
QFileIconProvider QMutableListIterator QStyleOptionFrame QXmlResultItems
QFileInfo QMutableMapIterator QStyleOptionFrameV2 QXmlSerializer
QFileOpenEvent QMutableSetIterator QStyleOptionFrameV3 QXmlSimpleReader
QFileSystemModel QMutableVectorIterator QStyleOptionGraphicsItem QXmlStreamAttribute
QFileSystemWatcher QMutex QStyleOptionGroupBox QXmlStreamAttributes
QFlag QMutexLocker QStyleOptionHeader QXmlStreamEntityDeclaration
QFlags QNetworkAccessManager QStyleOptionMenuItem QXmlStreamEntityResolver
QFocusEvent QNetworkAddressEntry QStyleOptionProgressBar QXmlStreamNamespaceDeclaration
QFocusFrame QNetworkCacheMetaData QStyleOptionProgressBarV2 QXmlStreamNotationDeclaration
QFont QNetworkCookie QStyleOptionQ3DockWindow QXmlStreamReader
QFontComboBox QNetworkCookieJar QStyleOptionQ3ListView QXmlStreamWriter

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


Copyright © 2008 Nokia Corporation and/or its subsidiary(-ies) Trademarks
Qt 4.5.0-beta1