Qt 5.15
New Classes and Functions in Qt 5.8
Qt 5.15.16 Reference Documentation

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
New Classes
New Member Functions
New Functions in Namespaces
New Global Functions
New Macros
New Enum Types
New Type Aliases
New Properties
New QML Types
New QML Properties
New QML Signals
New QML Methods

New Namespaces

namespace QScxmlExecutableContent

New Classes

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

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

D: QDeadlineTimer

E: EvaluatorInfo (QScxmlExecutableContent)

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

H: QHCandlestickModelMapper

I: InvokeInfo (QScxmlExecutableContent)

L: Loader (QScxmlCompiler)

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

N: QNetworkDatagram

O: QOAuth1; QOAuth1Signature; QOAuth2AuthorizationCodeFlow; QOpenGLTextureBlitter

P: ParameterInfo (QScxmlExecutableContent); QPaintedTextureImage (Qt3DRender); QPointingDeviceUniqueId

R: QRenderCapture (Qt3DRender); QRenderCaptureReply (Qt3DRender)

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

T: TakeRowResult (QFormLayout); TimeStamp (QCanBusFrame)

V: QVCandlestickModelMapper

New Member Functions

Class FromBase64Result:

bool	operator!=(const QScopedPointer<T, Cleanup> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QScopedPointer<T, Cleanup> &rhs)
bool	operator!=(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator!=(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QWeakPointer<T> &rhs)
bool	operator==(const QScopedPointer<T, Cleanup> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QScopedPointer<T, Cleanup> &rhs)
bool	operator==(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator==(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QWeakPointer<T> &rhs)
uint	qHash(const QHash<Key, T> &key, uint seed)
uint	qHash(const QMultiHash<Key, T> &key, uint seed)

Class QChar:

bool	operator!=(const QScopedPointer<T, Cleanup> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QScopedPointer<T, Cleanup> &rhs)
bool	operator!=(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator!=(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QWeakPointer<T> &rhs)
bool	operator==(const QScopedPointer<T, Cleanup> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QScopedPointer<T, Cleanup> &rhs)
bool	operator==(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator==(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QWeakPointer<T> &rhs)

Class QCommandLineOption:

Flags	flags() const
void	setFlags(Flags flags)

Class QDateTime:

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

Class QHash:

uint	qHash(const QMultiHash<Key, T> &key, uint seed)

Class QKeyValueIterator:

bool	operator!=(const QScopedPointer<T, Cleanup> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QScopedPointer<T, Cleanup> &rhs)
bool	operator!=(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator!=(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QWeakPointer<T> &rhs)
bool	operator==(const QScopedPointer<T, Cleanup> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QScopedPointer<T, Cleanup> &rhs)
bool	operator==(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator==(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QWeakPointer<T> &rhs)

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 QLine:

QPoint center() const

Class QLibraryInfo:

QVersionNumber version()

Class QLineF:

QPointF center() const

Class QList:

uint	qHash(const QHash<Key, T> &key, uint seed)
uint	qHash(const QMultiHash<Key, T> &key, uint seed)

Class QMetaEnum:

bool	isScoped() const

Class QMetaType:

bool	operator!=(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator!=(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QWeakPointer<T> &rhs)
bool	operator==(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator==(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QWeakPointer<T> &rhs)

Class QMultiHash:

uint	qHash(const QMultiHash<Key, T> &key, uint seed)

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 QPair:

bool	operator!=(const QScopedPointer<T, Cleanup> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QScopedPointer<T, Cleanup> &rhs)
bool	operator!=(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator!=(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QWeakPointer<T> &rhs)
bool	operator==(const QScopedPointer<T, Cleanup> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QScopedPointer<T, Cleanup> &rhs)
bool	operator==(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator==(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QWeakPointer<T> &rhs)

Class QPoint:

CGPoint toCGPoint() const

Class QPointF:

QPointF	fromCGPoint(CGPoint point)
CGPoint	toCGPoint() const

Class QRectF:

QRectF	fromCGRect(CGRect rect)
CGRect	toCGRect() const

Class QRect:

CGRect toCGRect() const

Class QRegExp:

uint	qHash(const QHash<Key, T> &key, uint seed)
uint	qHash(const QMultiHash<Key, T> &key, uint seed)

Class QResource:

QDateTime lastModified() const

Class QScopedPointer:

bool	operator!=(const QScopedPointer<T, Cleanup> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QScopedPointer<T, Cleanup> &rhs)
bool	operator!=(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator!=(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QWeakPointer<T> &rhs)
bool	operator==(const QScopedPointer<T, Cleanup> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QScopedPointer<T, Cleanup> &rhs)
bool	operator==(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator==(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QWeakPointer<T> &rhs)

Class QSharedPointer:

bool	operator!=(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator!=(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QWeakPointer<T> &rhs)
bool	operator==(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator==(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QWeakPointer<T> &rhs)

Class QSizeF:

QSizeF	fromCGSize(CGSize size)
CGSize	toCGSize() const

Class QSize:

CGSize toCGSize() const

Class QStringList:

QString join(QLatin1String separator) const

Class QStringRef:

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

Class QStringView:

uint	qHash(const QHash<Key, T> &key, uint seed)
uint	qHash(const QMultiHash<Key, T> &key, uint seed)

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 QVarLengthArray:

bool	operator!=(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator!=(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QWeakPointer<T> &rhs)
bool	operator==(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator==(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QWeakPointer<T> &rhs)
uint	qHash(const QHash<Key, T> &key, uint seed)
uint	qHash(const QMultiHash<Key, T> &key, uint seed)

Class QVector:

uint	qHash(const QHash<Key, T> &key, uint seed)
uint	qHash(const QMultiHash<Key, T> &key, uint seed)

Class QWeakPointer:

bool	operator!=(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator!=(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator!=(std::nullptr_t, const QWeakPointer<T> &rhs)
bool	operator==(const QSharedPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QSharedPointer<T> &rhs)
bool	operator==(const QWeakPointer<T> &lhs, std::nullptr_t)
bool	operator==(std::nullptr_t, const QWeakPointer<T> &rhs)

Class QWaitCondition:

void	notify_all()
void	notify_one()

Class QAbstractTextDocumentLayout:

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

Class QColor:

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

Class QFont:

uint	qHash(const QRawFont &font, uint seed)

Class QFontMetricsF:

qreal capHeight() const

Class QFontMetrics:

int	capHeight() const

Class QMatrix:

uint	qHash(const QRawFont &font, uint seed)

Class QOpenGLContext:

QFunctionPointer getProcAddress(const char *procName) const

Class QPlatformTheme:

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

Class QPointingDeviceUniqueId:

bool	operator!=(QPointingDeviceUniqueId lhs, QPointingDeviceUniqueId rhs)
bool	operator==(QPointingDeviceUniqueId lhs, QPointingDeviceUniqueId rhs)
uint	qHash(QPointingDeviceUniqueId key, uint seed)
uint	qHash(const QRawFont &font, uint seed)

Class QRawFont:

qreal	capHeight() const
uint	qHash(const QRawFont &font, uint seed)

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 QRhiVertexInputBinding:

bool	operator!=(QPointingDeviceUniqueId lhs, QPointingDeviceUniqueId rhs)
uint	qHash(const QRawFont &font, uint seed)

Class UniformBlock:

bool	operator==(QPointingDeviceUniqueId lhs, QPointingDeviceUniqueId rhs)

Class QShaderKey:

uint	qHash(QPointingDeviceUniqueId key, uint seed)
uint	qHash(const QRawFont &font, uint seed)

Class TouchPoint:

qreal	rotation() const
QPointingDeviceUniqueId	uniqueId() const

Class QTransform:

uint	qHash(const QRawFont &font, uint seed)

Class QVector2D:

bool	operator!=(QPointingDeviceUniqueId lhs, QPointingDeviceUniqueId rhs)
bool	operator==(QPointingDeviceUniqueId lhs, QPointingDeviceUniqueId rhs)

Class QHostAddress:

bool	isEqual(const QHostAddress &other, ConversionMode mode) const
QDebug	operator<<(QDebug debug, const QSslDiffieHellmanParameters &dhparam)
QHostAddress &	operator=(SpecialAddress address)
void	setAddress(SpecialAddress address)

Class QNetworkAccessManager:

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

Class QNetworkCacheMetaData:

QDebug operator<<(QDebug debug, const QSslDiffieHellmanParameters &dhparam)

Class QNetworkProxyFactory:

bool	usesSystemConfiguration()

Class QOcspResponse:

bool	operator==(const QSslDiffieHellmanParameters &lhs, const QSslDiffieHellmanParameters &rhs)

Class QSslConfiguration:

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

Class QSslDiffieHellmanParameters:

QDebug	operator<<(QDebug debug, const QSslDiffieHellmanParameters &dhparam)
bool	operator==(const QSslDiffieHellmanParameters &lhs, const QSslDiffieHellmanParameters &rhs)
uint	qHash(const QSslDiffieHellmanParameters &dhparam, uint seed)

Class QSslPreSharedKeyAuthenticator:

bool	operator==(const QSslDiffieHellmanParameters &lhs, const QSslDiffieHellmanParameters &rhs)

Class QUdpSocket:

QNetworkDatagram	receiveDatagram(qint64 maxSize)
qint64	writeDatagram(const QNetworkDatagram &datagram)

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 QMainWindow:

void	tabifiedDockWidgetActivated(QDockWidget *dockWidget)

Class QUndoStack:

void	resetClean()

Class QSerialPort:

void	errorOccurred(QSerialPort::SerialPortError error)

Class QJSEngine:

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

Class QJSValue:

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

Class QQmlEngine:

void	exit(int retCode)
int	qmlRegisterUncreatableMetaObject(const QMetaObject &staticMetaObject, const char *uri, int versionMajor, int versionMinor, const char *qmlName, const QString &reason)

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 QWebSocket:

void	preSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator *authenticator)

Class QWebSocketServer:

void	preSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator *authenticator)

Class QBluetoothDeviceDiscoveryAgent:

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

Class QLowEnergyController:

QBluetoothUuid remoteDeviceUuid() const

Class QQuickStyle:

void	setFallbackStyle(const QString &style)

New Functions in Namespaces

QAndroidJniObject	androidContext()
qreal	convertVolume(qreal volume, VolumeScale from, VolumeScale to)
QTouchDevice *	createTouchDevice(QTouchDevice::DeviceType devType)
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)
uint	qHash(const QRawFont &font, uint seed)
uint	qHash(QPointingDeviceUniqueId key, uint seed)
uint	qHash(const QMultiHash<Key, T> &key, uint seed)
uint	qHash(const QHash<Key, T> &key, uint seed)
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
	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT
	Q_ENUM_NS(...)
	Q_ENUM_NS(...)
void	Q_FALLTHROUGH
void	Q_FALLTHROUGH
	Q_FLAG_NS(...)
	Q_FLAG_NS(...)
	Q_NAMESPACE
	Q_NAMESPACE

New Enum Types

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

New Type Aliases

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

New Properties

useHoverEffects : const

New QML Types

New QML Properties

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

New QML Signals

binaryMessageReceived()

New QML Methods

	convertVolume()
	sendBinaryMessage()
	tryVerify()

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