Qt Documentation

Qt 5.8
New Classes and Functions in Qt 5.8

New Classes and Functions in Qt 5.8

This page contains a comprehensive list of all new classes and functions introduced in Qt 5.8. Links to new APIs in previous Qt 5 releases are found at the bottom of this page.

New Namespaces

namespace QScxmlExecutableContent

New Classes

A: QAbstractOAuth; QAbstractOAuth2; QAbstractOAuthReplyHandler; AssignmentInfo (QScxmlExecutableContent); QAxisAccumulator (Qt3DInput)

C: QCanBus; QCanBusDevice; QCanBusFactory; QCanBusFrame; QCandlestickLegendMarker; QCandlestickModelMapper; QCandlestickSeries; QCandlestickSet

D: QDeadlineTimer

E: EvaluatorInfo (QScxmlExecutableContent)

F: Filter (QCanBusDevice); ForeachLoopBody (QScxmlDataModel); ForeachInfo (QScxmlExecutableContent)

H: QHCandlestickModelMapper

I: InvokeInfo (QScxmlExecutableContent)

L: Loader (QScxmlCompiler)

M: QModbusClient; QModbusDataUnit; QModbusDevice; QModbusDeviceIdentification; QModbusExceptionResponse; QModbusPdu; QModbusReply; QModbusRequest; QModbusResponse; QModbusRtuSerialSlave; QModbusServer; QModbusTcpClient; QModbusTcpServer

N: QNetworkDatagram

O: QOpenGLTextureBlitter

P: QPointingDeviceUniqueId; ParameterInfo (QScxmlExecutableContent)

R: QRenderCapture (Qt3DRender); QRenderCaptureReply (Qt3DRender)

S: QSGImageNode; QSGRectangleNode; QSGRenderNode; QSGRendererInterface; QSctpServer; QSctpSocket; QScxmlDynamicScxmlServiceFactory; QScxmlInvokableService; QScxmlInvokableServiceFactory; QScxmlStaticScxmlServiceFactory; QScxmlTableData; QSslDiffieHellmanParameters

T: TimeStamp (QCanBusFrame)

V: QVCandlestickModelMapper

W: QWaylandBufferRef; QWaylandClient; QWaylandCompositor; QWaylandIviSurface; QWaylandKeyboard; QWaylandOutput; QWaylandOutputMode; QWaylandPointer; QWaylandQuickItem; QWaylandQuickShellSurfaceItem; QWaylandSeat; QWaylandSurface; QWaylandSurfaceGrabber; QWaylandTouch; QWaylandView; QWaylandWlShell; QWaylandWlShellSurface; QWaylandXdgPopupV5; QWaylandXdgSurfaceV5

New Member Functions

Class QLine:

QPoint center() const

Class QLibraryInfo:

QVersionNumber version()

Class QMetaEnum:

bool	isScoped() const

Class QTimer:

std::chrono::milliseconds	intervalAsDuration() const
std::chrono::milliseconds	remainingTimeAsDuration() const
void	singleShot(std::chrono::milliseconds msec, const QObject *receiver, const char *member)
void	singleShot(std::chrono::milliseconds msec, Qt::TimerType timerType, const QObject *receiver, const char *member)
void	start(std::chrono::milliseconds msec)

Class QMutex:

bool	try_lock()
bool	try_lock_for(std::chrono::duration<Rep, Period> duration)
bool	try_lock_until(std::chrono::time_point<Clock, Duration> timePoint)

Class QWaitCondition:

void	notify_all()
void	notify_one()

Class QLatin1String:

QLatin1Char	at(int pos) const
QLatin1String	left(int length) const
QLatin1String	mid(int start) const
QLatin1String	mid(int start, int length) const
QLatin1Char	operator[](int pos) const
QLatin1String	right(int length) const

Class QCommandLineOption:

Flags	flags() const
void	setFlags(Flags flags)

Class QDateTime:

qint64	currentSecsSinceEpoch()
QDateTime	fromSecsSinceEpoch(qint64 secs, Qt::TimeSpec spec = Qt::LocalTime, int offsetSeconds = 0)
QDateTime	fromSecsSinceEpoch(qint64 secs, const QTimeZone &timeZone)
void	setSecsSinceEpoch(qint64 secs)
qint64	toSecsSinceEpoch() const

Class QLineF:

QPointF center() const

Class QRect:

CGRect toCGRect() const

Class QPoint:

CGPoint toCGPoint() const

Class QPointF:

QPointF	fromCGPoint(CGPoint point)
CGPoint	toCGPoint() const

Class QRectF:

QRectF	fromCGRect(CGRect rect)
CGRect	toCGRect() const

Class QSize:

CGSize toCGSize() const

Class QSizeF:

QSizeF	fromCGSize(CGSize size)
CGSize	toCGSize() const

Class QStringList:

QString join(QLatin1String separator) const

Class QStringRef:

void	chop(int n)
int	compare(const QByteArray &other, Qt::CaseSensitivity cs = Qt::CaseSensitive) const

Class TouchPoint:

qreal	rotation() const
QPointingDeviceUniqueId	uniqueId() const

Class QOpenGLContext:

QFunctionPointer getProcAddress(const char *procName) const

Class QPlatformTheme:

virtual QIcon fileIcon(const QFileInfo &fileInfo, QPlatformTheme::IconOptions iconOptions = 0) const

Class QColor:

bool	isValidColor(QLatin1String name)
void	setNamedColor(QLatin1String name)

Class QRegion:

const_iterator	begin() const
const_iterator	cbegin() const
const_iterator	cend() const
const_reverse_iterator	crbegin() const
const_reverse_iterator	crend() const
const_iterator	end() const
const_reverse_iterator	rbegin() const
const_reverse_iterator	rend() const

Class QAbstractTextDocumentLayout:

QTextFormat	formatAt(const QPointF &pos) const
QString	imageAt(const QPointF &pos) const

Class QFontMetrics:

int	capHeight() const

Class QFontMetricsF:

qreal capHeight() const

Class QRawFont:

qreal capHeight() const

Class QNetworkAccessManager:

QNetworkReply *	sendCustomRequest(const QNetworkRequest &request, const QByteArray &verb, const QByteArray &data)
QNetworkReply *	sendCustomRequest(const QNetworkRequest &request, const QByteArray &verb, QHttpMultiPart *multiPart)

Class QHostAddress:

bool	isEqual(const QHostAddress &other, ConversionMode mode = TolerantConversion) const
QHostAddress &	operator=(SpecialAddress address)
void	setAddress(SpecialAddress address)

Class QNetworkProxyFactory:

bool	usesSystemConfiguration()

Class QSslConfiguration:

QSslDiffieHellmanParameters	diffieHellmanParameters() const
QByteArray	preSharedKeyIdentityHint() const
void	setDiffieHellmanParameters(const QSslDiffieHellmanParameters &dhparams)
void	setPreSharedKeyIdentityHint(const QByteArray &hint)

Class QFormLayout:

void	removeRow(int row)
void	removeRow(QWidget *widget)
void	removeRow(QLayout *layout)
TakeRowResult	takeRow(int row)
TakeRowResult	takeRow(QWidget *widget)
TakeRowResult	takeRow(QLayout *layout)

Class QUndoStack:

void	resetClean()

Class QMainWindow:

void	tabifiedDockWidgetActivated(QDockWidget *dockWidget)

Class QBluetoothDeviceDiscoveryAgent:

int	lowEnergyDiscoveryTimeout() const
void	setLowEnergyDiscoveryTimeout(int timeout)
void	start(DiscoveryMethods methods)
DiscoveryMethods	supportedDiscoveryMethods()

Class QLowEnergyController:

QBluetoothUuid remoteDeviceUuid() const

Class QJSValue:

bool	isQMetaObject() const
const QMetaObject *	toQMetaObject() const

Class QJSEngine:

QJSValue	newQMetaObject(const QMetaObject *metaObject)
QJSValue	newQMetaObject()

Class QQmlEngine:

void	exit(int retCode)

Class QQuickWindow:

QSGImageNode *	createImageNode() const
QSGNinePatchNode *	createNinePatchNode() const
QSGRectangleNode *	createRectangleNode() const
QSGRendererInterface *	rendererInterface() const
void	setSceneGraphBackend(QSGRendererInterface::GraphicsApi api)
void	setSceneGraphBackend(const QString &backend)

Class QSGEngine:

QSGImageNode *	createImageNode() const
QSGNinePatchNode *	createNinePatchNode() const
QSGRectangleNode *	createRectangleNode() const
QSGRendererInterface *	rendererInterface() const

Class QQuickStyle:

void	setFallbackStyle(const QString &style)

Class QSerialPort:

void	errorOccurred(QSerialPort::SerialPortError error)

Class QQuickWebEngineProfile:

QStringList spellCheckLanguages() const

Class QWebEngineContextMenuData:

QString	misspelledWord() const
QStringList	spellCheckerSuggestions() const

Class QWebEngineDownloadItem:

DownloadType type() const

Class QWebEngineProfile:

bool	isSpellCheckEnabled() const
void	setSpellCheckEnabled(bool enable)
void	setSpellCheckLanguages(const QStringList &languages)
QStringList	spellCheckLanguages() const

Class QWebEnginePage:

void	print(QPrinter *printer, FunctorOrLambda resultCallback)
void	replaceMisspelledWord(const QString &replacement)
void	save(const QString &filePath, QWebEngineDownloadItem::SavePageFormat format = QWebEngineDownloadItem::MimeHtmlSaveFormat) const

Class QWebSocket:

void	preSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator *authenticator)

Class QWebSocketServer:

void	preSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator *authenticator)

New Functions in Namespaces

QAndroidJniObject	androidContext()
qreal	convertVolume(qreal volume, VolumeScale from, VolumeScale to)
QTouchDevice *	createTouchDevice(QTouchDevice::DeviceType devType = QTouchDevice::TouchScreen)
char *	toString(std::nullptr_t)

New Global Functions

bool	operator!=(QPointingDeviceUniqueId lhs, QPointingDeviceUniqueId rhs)
bool	operator!=(std::nullptr_t, const QWeakPointer<T> &rhs)
bool	operator!=(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator!=(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QScopedPointer<T, Cleanup> &rhs)
bool	operator!=(const QScopedPointer<T, Cleanup> &lhs, std::nullptr_t)
QDebug	operator<<(QDebug debug, const QSslDiffieHellmanParameters &dhparam)
bool	operator==(const QSslDiffieHellmanParameters &lhs, const QSslDiffieHellmanParameters &rhs)
bool	operator==(QPointingDeviceUniqueId lhs, QPointingDeviceUniqueId rhs)
bool	operator==(std::nullptr_t, const QWeakPointer<T> &rhs)
bool	operator==(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator==(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QScopedPointer<T, Cleanup> &rhs)
bool	operator==(const QScopedPointer<T, Cleanup> &lhs, std::nullptr_t)
uint	qHash(const QSslDiffieHellmanParameters &dhparam, uint seed = 0)
uint	qHash(const QRawFont &font, uint seed = 0)
uint	qHash(QPointingDeviceUniqueId key, uint seed = 0)
uint	qHash(const QMultiHash<Key, T> &key, uint seed = 0)
uint	qHash(const QHash<Key, T> &key, uint seed = 0)
int	qmlRegisterUncreatableMetaObject(const QMetaObject &staticMetaObject, const char *uri, int versionMajor, int versionMinor, const char *qmlName, const QString &reason)

New Macros

	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT
	Q_ENUM_NS(...)
void	Q_FALLTHROUGH()
	Q_FLAG_NS(...)
	Q_NAMESPACE

New Enum Types

enum	VolumeScale { LinearVolumeScale, CubicVolumeScale, LogarithmicVolumeScale, DecibelVolumeScale }
enum	DiscoveryMethod { NoMethod, ClassicMethod, LowEnergyMethod }
enum	ConversionModeFlag { StrictConversion, ConvertV4MappedToIPv4, ConvertV4CompatToIPv4, ConvertLocalHost, ConvertUnspecifiedAddress, TolerantConversion }
enum	LegendMarkerType { LegendMarkerTypeArea, LegendMarkerTypeBar, LegendMarkerTypePie, LegendMarkerTypeXY, LegendMarkerTypeBoxPlot, LegendMarkerTypeCandlestick }
enum	DownloadType { Attachment, DownloadAttribute, UserRequested, SavePage }

New Typedefs

typedef	QModbusDataUnitMap
typedef	const_iterator
typedef	const_reverse_iterator
typedef	ContainerId
typedef	EvaluatorId
typedef	InstructionId
typedef	StringId

New Properties

useHoverEffects : bool

New QML Types

New QML Properties

	delayed
	font.hintingPreference
	font.hintingPreference
	font.hintingPreference
	imageSource
	overwriteMode
	overwriteMode

New QML Signals

binaryMessageReceived(QString message)

New QML Methods

	callLater(function, argument1, argument2, ...)
	callLater(function)
real	convertVolume(real volume, VolumeScale from, VolumeScale to)
	tryVerify(function, timeout = 5000, message = "")
void	sendBinaryMessage(ArrayBuffer message)

Additions to Other Qt 5 Releases

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