Qt 5.15
New Classes and Functions in Qt 5.5
Qt 5.15.8 Reference Documentation

New Classes and Functions in Qt 5.5

This page contains a comprehensive list of all new classes and functions introduced in Qt 5.5. Links to new APIs in previous Qt 5 releases are found at the bottom of this page.

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

New Classes

A: QAbstractAxisInput (Qt3DInput); QAbstractTexture (Qt3DRender); QAbstractTextureImage (Qt3DRender); QAbstractVideoFilter; QAxisSetting (Qt3DInput)

B: QBlendEquationArguments (Qt3DRender)

C: QCamera (Qt3DRender); QCameraLens (Qt3DRender); QCameraSelector (Qt3DRender); QCameraViewfinderSettings; QCameraViewfinderSettingsControl2; QClipPlane (Qt3DRender); QComponent (Qt3DCore)

E: QEntity (Qt3DCore)

F: FrameRateRange (QCamera); QFilterKey (Qt3DRender); QFrameAction (Qt3DLogic); QFrameGraphNode (Qt3DRender)

G: QGraphicsApiFilter (Qt3DRender)

I: QInputAspect (Qt3DInput); QInputDeviceIntegration (Qt3DInput)

K: QKeyboardDevice (Qt3DInput); QKeyboardHandler (Qt3DInput); QKeyEvent (Qt3DInput)

L: QLayer (Qt3DRender); QLayerFilter (Qt3DRender)

M: QMaterial (Qt3DRender); QMouseDevice (Qt3DInput); QMouseEvent (Qt3DInput); QMouseHandler (Qt3DInput)

N: QNode (Qt3DCore); QNoDraw (Qt3DRender)

O: QOpenGLFunctions_4_4_Compatibility; QOpenGLFunctions_4_4_Core; QOpenGLFunctions_4_5_Compatibility; QOpenGLFunctions_4_5_Core

P: QPlatformSurfaceEvent; QPointLight (Qt3DRender)

R: QRenderStateSet (Qt3DRender)

S: QShaderData (Qt3DRender); QShaderProgram (Qt3DRender); QSkyboxEntity (Qt3DExtras); QSpotLight (Qt3DRender); QSslEllipticCurve; QSslPreSharedKeyAuthenticator

V: QVideoFilterRunnable

W: QWebEngineDownloadItem; QWebEngineProfile; QWebEngineScript; QWebEngineScriptCollection; QWheelEvent (Qt3DInput); QWindowsWindowFunctions

New Member Functions

Class QBluetoothDeviceInfo:

QBluetoothUuid	deviceUuid() const
void	setDeviceUuid(const QBluetoothUuid &uuid)

Class QBluetoothHostInfo:

bool	operator!=(const QBluetoothHostInfo &other) const
bool	operator==(const QBluetoothHostInfo &other) const

Class QLowEnergyController:

QString remoteName() const

Class QLowEnergyService:

void	characteristicRead(const QLowEnergyCharacteristic &characteristic, const QByteArray &value)
void	descriptorRead(const QLowEnergyDescriptor &descriptor, const QByteArray &value)
void	readCharacteristic(const QLowEnergyCharacteristic &characteristic)
void	readDescriptor(const QLowEnergyDescriptor &descriptor)

Class QAssociativeIterable:

QAssociativeIterable::const_iterator find(const QVariant &key) const

Class FromBase64Result:

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

Class QChar:

bool	operator<=(const QUuid &lhs, const QUuid &rhs)
bool	operator>=(const QUuid &lhs, const QUuid &rhs)

Class QDateTime:

QDateTime	fromCFDate(CFDateRef date)
QDateTime	fromNSDate(const NSDate *date)
CFDateRef	toCFDate() const
NSDate *	toNSDate() const

Class QDebug:

QDebug &	operator<<(char16_t t)
QDebug &	operator<<(char32_t t)

Class QHash:

uint	qHash(const QSet<T> &key, uint seed)
uint	qHashRange(InputIterator first, InputIterator last, uint seed)
uint	qHashRangeCommutative(InputIterator first, InputIterator last, uint seed)

Class QItemSelectionModel:

QAbstractItemModel *	model()
void	modelChanged(QAbstractItemModel *model)
void	setModel(QAbstractItemModel *model)

Class QJsonObject:

QJsonObject	fromVariantHash(const QVariantHash &hash)
QVariantHash	toVariantHash() const

Class QList:

bool	operator<=(const QUuid &lhs, const QUuid &rhs)
bool	operator>=(const QUuid &lhs, const QUuid &rhs)
uint	qHash(const QSet<T> &key, uint seed)

Class QLocale:

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

Class QLoggingCategory:

bool	isInfoEnabled() const

Class QMessageLogger:

void	info(const char *msg, ...) const
void	info(const QLoggingCategory &cat, const char *msg, ...) const
void	info(QMessageLogger::CategoryFunction catFunc, const char *msg, ...) const
QDebug	info() const
QDebug	info(const QLoggingCategory &cat) const
QDebug	info(QMessageLogger::CategoryFunction catFunc) const

Class QMetaEnum:

QMetaEnum fromType()

Class QMetaMethod:

bool	invokeOnGadget(void *gadget, QGenericReturnArgument returnValue, QGenericArgument val0, QGenericArgument val1, QGenericArgument val2, QGenericArgument val3, QGenericArgument val4, QGenericArgument val5, QGenericArgument val6, QGenericArgument val7, QGenericArgument val8, QGenericArgument val9) const
bool	invokeOnGadget(void *gadget, QGenericArgument val0, QGenericArgument val1, QGenericArgument val2, QGenericArgument val3, QGenericArgument val4, QGenericArgument val5, QGenericArgument val6, QGenericArgument val7, QGenericArgument val8, QGenericArgument val9) const

Class QMetaProperty:

QVariant	readOnGadget(const void *gadget) const
bool	resetOnGadget(void *gadget) const
bool	writeOnGadget(void *gadget, const QVariant &value) const

Class QMetaType:

bool	equals(const void *lhs, const void *rhs, int typeId, int *result)
const QMetaObject *	metaObject() const
bool	registerEqualsComparator()
int	type(const ::QByteArray &typeName)

Class QMultiHash:

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

Class QPair:

bool	operator<=(const QUuid &lhs, const QUuid &rhs)
bool	operator>=(const QUuid &lhs, const QUuid &rhs)
void	swap(QPair<T1, T2> &other)

Class QPersistentModelIndex:

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

Class QRegExp:

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

Class QRegularExpression:

QRegularExpressionMatchIterator	globalMatch(const QStringRef &subjectRef, int offset, QRegularExpression::MatchType matchType, QRegularExpression::MatchOptions matchOptions) const
QRegularExpressionMatch	match(const QStringRef &subjectRef, int offset, QRegularExpression::MatchType matchType, QRegularExpression::MatchOptions matchOptions) const

Class QState:

QSignalTransition * addTransition(const QObject *sender, PointerToMemberFunction signal, QAbstractState *target)

Class QString:

QString	asprintf(const char *cformat, ...)
QString	fromStdU16String(const std::u16string &str)
QString	fromStdU32String(const std::u32string &str)
int	indexOf(const QRegularExpression &re, int from, QRegularExpressionMatch *rmatch) const
QString &	insert(int position, const QStringRef &str)
QString &	insert(int position, const char *str)
QString &	insert(int position, const QByteArray &str)
int	lastIndexOf(const QRegularExpression &re, int from, QRegularExpressionMatch *rmatch) const
QString &	prepend(const QChar *str, int len)
QString &	prepend(const QStringRef &str)
std::u16string	toStdU16String() const
std::u32string	toStdU32String() const
QString	vasprintf(const char *cformat, va_list ap)

Class QStringView:

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

Class QTextStream:

bool	readLineInto(QString *line, qint64 maxlen)

Class QThread:

int	loopLevel() const

Class QTimeZone:

QTimeZone	systemTimeZone()
QTimeZone	utc()

Class QUuid:

bool	operator<=(const QUuid &lhs, const QUuid &rhs)
bool	operator>=(const QUuid &lhs, const QUuid &rhs)

Class QVarLengthArray:

bool	operator<=(const QUuid &lhs, const QUuid &rhs)
QVarLengthArray<T, Prealloc> &	operator=(std::initializer_list<T> list)
bool	operator>=(const QUuid &lhs, const QUuid &rhs)
uint	qHash(const QSet<T> &key, uint seed)

Class QVariant:

QPersistentModelIndex toPersistentModelIndex() const

Class QVector:

void	append(const QVector<T> &value)
bool	operator<=(const QUuid &lhs, const QUuid &rhs)
bool	operator>=(const QUuid &lhs, const QUuid &rhs)
uint	qHash(const QSet<T> &key, uint seed)

Class QDBusConnection:

bool	registerObject(const QString &path, const QString &interface, QObject *object, QDBusConnection::RegisterOptions options)

Class QFontDatabase:

bool	isPrivateFamily(const QString &family) const

Class QGenericMatrix:

QVector3D	operator(const QQuaternion &quaternion, const QVector3D &vec*)
const QVector3D	operator/(const QVector3D &vector, const QVector3D &divisor)
const QVector4D	operator/(const QVector4D &vector, const QVector4D &divisor)

Class QImageReader:

bool	autoTransform() const
void	setAutoTransform(bool enabled)
QImageIOHandler::Transformations	transformation() const

Class QImageWriter:

bool	optimizedWrite() const
bool	progressiveScanWrite() const
void	setOptimizedWrite(bool optimize)
void	setProgressiveScanWrite(bool progressive)
void	setTransformation(QImageIOHandler::Transformations transform)
QImageIOHandler::Transformations	transformation() const

Class QMatrix4x4:

bool	isAffine() const

Class QOpenGLContext:

QOpenGLContext *	globalShareContext()
bool	supportsThreadedOpenGL()

Class QOpenGLTexture:

void	allocateStorage(QOpenGLTexture::PixelFormat pixelFormat, QOpenGLTexture::PixelType pixelType)
QOpenGLTexture::ComparisonFunction	comparisonFunction() const
QOpenGLTexture::ComparisonMode	comparisonMode() const
void	setComparisonFunction(QOpenGLTexture::ComparisonFunction function)
void	setComparisonMode(QOpenGLTexture::ComparisonMode mode)

Class QPixelFormat:

QPixelFormat qPixelFormatAlpha(uchar channelSize, QPixelFormat::TypeInterpretation typeInterpretation)

Class QPlatformFontDatabase:

QFont::Weight weightFromInteger(int weight)

Class QPlatformIntegration:

virtual void	destroy()
virtual void	setApplicationIcon(const QIcon &icon) const

Class QQuaternion:

QQuaternion	conjugated() const
float	dotProduct(const QQuaternion &q1, const QQuaternion &q2)
QQuaternion	fromAxes(const QVector3D &xAxis, const QVector3D &yAxis, const QVector3D &zAxis)
QQuaternion	fromDirection(const QVector3D &direction, const QVector3D &up)
QQuaternion	fromEulerAngles(float pitch, float yaw, float roll)
QQuaternion	fromEulerAngles(const QVector3D &eulerAngles)
QQuaternion	fromRotationMatrix(const QMatrix3x3 &rot3x3)
void	getAxes(QVector3D *xAxis, QVector3D *yAxis, QVector3D *zAxis) const
void	getAxisAndAngle(float x, float y, float z, float angle) const
void	getAxisAndAngle(QVector3D *axis, float *angle) const
void	getEulerAngles(float *pitch, float *yaw, float *roll) const
QQuaternion	inverted() const
QVector3D	operator(const QQuaternion &quaternion, const QVector3D &vec*)
QQuaternion	rotationTo(const QVector3D &from, const QVector3D &to)
QVector3D	toEulerAngles() const
QMatrix3x3	toRotationMatrix() const

Class QTextDocument:

QTextCursor	find(const QRegularExpression &expr, int from, QTextDocument::FindFlags options) const
QTextCursor	find(const QRegularExpression &expr, const QTextCursor &cursor, QTextDocument::FindFlags options) const

Class QVector2D:

QVector3D	operator(const QQuaternion &quaternion, const QVector3D &vec*)
const QVector2D	operator/(const QVector2D &vector, const QVector2D &divisor)
const QVector3D	operator/(const QVector3D &vector, const QVector3D &divisor)
const QVector4D	operator/(const QVector4D &vector, const QVector4D &divisor)
QVector2D &	operator/=(const QVector2D &vector)

Class QVector3D:

QVector3D	operator(const QQuaternion &quaternion, const QVector3D &vec*)
const QVector3D	operator/(const QVector3D &vector, const QVector3D &divisor)
const QVector4D	operator/(const QVector4D &vector, const QVector4D &divisor)
QVector3D &	operator/=(const QVector3D &vector)
QVector3D	project(const QMatrix4x4 &modelView, const QMatrix4x4 &projection, const QRect &viewport) const
QVector3D	unproject(const QMatrix4x4 &modelView, const QMatrix4x4 &projection, const QRect &viewport) const

Class QVector4D:

QVector3D	operator(const QQuaternion &quaternion, const QVector3D &vec*)
const QVector4D	operator/(const QVector4D &vector, const QVector4D &divisor)
QVector4D &	operator/=(const QVector4D &vector)

Class QWindow:

void	requestUpdate()

Class QWheelEvent:

Qt::MouseEventSource source() const

Class QCamera:

void	setViewfinderSettings(const QCameraViewfinderSettings &settings)
QList<QCamera::FrameRateRange>	supportedViewfinderFrameRateRanges(const QCameraViewfinderSettings &settings) const
QList<QVideoFrame::PixelFormat>	supportedViewfinderPixelFormats(const QCameraViewfinderSettings &settings) const
QList<QSize>	supportedViewfinderResolutions(const QCameraViewfinderSettings &settings) const
QList<QCameraViewfinderSettings>	supportedViewfinderSettings(const QCameraViewfinderSettings &settings) const
QCameraViewfinderSettings	viewfinderSettings() const

Class QCameraImageProcessing:

QCameraImageProcessing::ColorFilter	colorFilter() const
bool	isColorFilterSupported(QCameraImageProcessing::ColorFilter filter) const
void	setColorFilter(QCameraImageProcessing::ColorFilter filter)

Class QCameraViewfinderSettings:

bool	operator!=(const QCameraViewfinderSettings &lhs, const QCameraViewfinderSettings &rhs)
bool	operator==(const QCameraViewfinderSettings &lhs, const QCameraViewfinderSettings &rhs)

Class QHostAddress:

QDebug	operator<<(QDebug debug, QSslEllipticCurve curve)
uint	qHash(QSslEllipticCurve curve, uint seed)
void	setAddress(const quint8 *ip6Addr)

Class QNetworkAccessManager:

void	preSharedKeyAuthenticationRequired(QNetworkReply *reply, QSslPreSharedKeyAuthenticator *authenticator)

Class QNetworkCacheMetaData:

QDebug operator<<(QDebug debug, QSslEllipticCurve curve)

Class QNetworkReply:

void	preSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator *authenticator)

Class QOcspResponse:

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

Class QSslConfiguration:

QVector<QSslEllipticCurve>	ellipticCurves() const
void	setEllipticCurves(const QVector<QSslEllipticCurve> &curves)
QList<QSslCipher>	supportedCiphers()
QVector<QSslEllipticCurve>	supportedEllipticCurves()
QList<QSslCertificate>	systemCaCertificates()

Class QSslDiffieHellmanParameters:

QDebug	operator<<(QDebug debug, QSslEllipticCurve curve)
bool	operator==(QSslEllipticCurve lhs, QSslEllipticCurve rhs)
uint	qHash(QSslEllipticCurve curve, uint seed)

Class QSslEllipticCurve:

bool	operator!=(QSslEllipticCurve lhs, QSslEllipticCurve rhs)
QDebug	operator<<(QDebug debug, QSslEllipticCurve curve)
bool	operator==(QSslEllipticCurve lhs, QSslEllipticCurve rhs)

Class QSslPreSharedKeyAuthenticator:

bool	operator!=(const QSslPreSharedKeyAuthenticator &lhs, const QSslPreSharedKeyAuthenticator &rhs)
bool	operator!=(QSslEllipticCurve lhs, QSslEllipticCurve rhs)
bool	operator==(const QSslPreSharedKeyAuthenticator &lhs, const QSslPreSharedKeyAuthenticator &rhs)
bool	operator==(QSslEllipticCurve lhs, QSslEllipticCurve rhs)

Class QSslSocket:

void	preSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator *authenticator)

Class QGeoCircle:

QString toString() const

Class QGeoRectangle:

QString toString() const

Class QGeoShape:

QGeoCoordinate	center() const
QString	toString() const

Class QJSEngine:

QJSEngine * qjsEngine(const QObject *object)

Class QQuickWidget:

QQuickWindow * quickWindow() const

Class QSGSimpleTextureNode:

void	setSourceRect(const QRectF &r)
void	setSourceRect(qreal x, qreal y, qreal w, qreal h)
QRectF	sourceRect() const

Class QWebEnginePage:

virtual bool	acceptNavigationRequest(const QUrl &url, QWebEnginePage::NavigationType type, bool isMainFrame)
QWebEngineProfile *	profile() const
void	setWebChannel(QWebChannel *channel)
QWebChannel *	webChannel() const

Class QWebEngineProfile:

void	downloadRequested(QWebEngineDownloadItem *download)

Class QAbstractScrollArea:

QMargins viewportMargins() const

Class QFrame:

void	initStyleOption(QStyleOptionFrame *option) const

Class QGraphicsScene:

void	setSelectionArea(const QPainterPath &path, Qt::ItemSelectionOperation selectionOperation, Qt::ItemSelectionMode mode, const QTransform &deviceTransform)

Class QOpenGLWidget:

void	setUpdateBehavior(QOpenGLWidget::UpdateBehavior updateBehavior)
QOpenGLWidget::UpdateBehavior	updateBehavior() const

Class QPlainTextEdit:

QMenu * createStandardContextMenu(const QPoint &position)

Class QSpacerItem:

QSizePolicy sizePolicy() const

New Functions in Namespaces

char *	toString(QSizePolicy sp)
char *	toString(QSizePolicy::ControlType ct)
char *	toString(QSizePolicy::ControlTypes cts)
char *	toString(QSizePolicy::Policy p)

New Global Functions

bool	operator!=(QSslEllipticCurve lhs, QSslEllipticCurve rhs)
bool	operator!=(const QSslPreSharedKeyAuthenticator &lhs, const QSslPreSharedKeyAuthenticator &rhs)
bool	operator!=(const QCameraViewfinderSettings &lhs, const QCameraViewfinderSettings &rhs)
QVector3D	operator(const QQuaternion &quaternion, const QVector3D &vec*)
const QVector4D	operator/(const QVector4D &vector, const QVector4D &divisor)
const QVector3D	operator/(const QVector3D &vector, const QVector3D &divisor)
const QVector2D	operator/(const QVector2D &vector, const QVector2D &divisor)
QDebug	operator<<(QDebug debug, QSslEllipticCurve curve)
bool	operator<=(const QUuid &lhs, const QUuid &rhs)
bool	operator==(QSslEllipticCurve lhs, QSslEllipticCurve rhs)
bool	operator==(const QSslPreSharedKeyAuthenticator &lhs, const QSslPreSharedKeyAuthenticator &rhs)
bool	operator==(const QCameraViewfinderSettings &lhs, const QCameraViewfinderSettings &rhs)
bool	operator>=(const QUuid &lhs, const QUuid &rhs)
int	qEnvironmentVariableIntValue(const char *varName, bool *ok)
int	qEnvironmentVariableIntValue(const char *varName, bool *ok)
uint	qHash(QSslEllipticCurve curve, uint seed)
uint	qHash(QSslEllipticCurve curve, uint seed)
uint	qHash(const QSet<T> &key, uint seed)
uint	qHashRange(InputIterator first, InputIterator last, uint seed)
uint	qHashRangeCommutative(InputIterator first, InputIterator last, uint seed)
QPixelFormat	qPixelFormatAlpha(uchar channelSize, QPixelFormat::TypeInterpretation typeInterpretation)
QJSEngine *	qjsEngine(const QObject *object)
void	swap(QPair<T1, T2> &lhs, QPair<T1, T2> &rhs)

New Macros

	Q_ENUM(...)
	Q_ENUM(...)
	Q_FLAG(...)
	Q_FLAG(...)
	qCInfo(category, const char *message, ...)
	qCInfo(category)
	qCInfo(category, const char *message, ...)
	qCInfo(category)
	qInfo(const char *message, ...)
	qInfo(const char *message, ...)

New Enum Types

enum	ColorFilter { ColorFilterNone, ColorFilterGrayscale, ColorFilterNegative, ColorFilterSolarize, ColorFilterSepia, …, ColorFilterVendor }
enum	Transformation { TransformationNone, TransformationMirror, TransformationFlip, TransformationRotate180, TransformationRotate90, …, TransformationRotate270 }
enum	ComparisonFunction { CompareLessEqual, CompareGreaterEqual, CompareLess, CompareGreater, CompareEqual, …, CompareNever }
enum	ComparisonMode { CompareRefToTexture, CompareNone }
enum	UpdateBehavior { NoPartialUpdate, PartialUpdate }
enum	TabFocusBehavior { NoTabFocus, TabFocusTextControls, TabFocusListControls, TabFocusAllControls }

New Properties

center : const
radius : const
altitude : const
isValid : const
latitude : const
longitude : const
bottomLeft : const
bottomRight : const
center : const
height : const
topLeft : const

topRight : const
width : const
isEmpty : const
isValid : const
type : const
selectedIndexes : const
devicePixelRatio : const
breakEnabled : const
singleClickActivation : const
tabFocusBehavior : const

New QML Types

A: AbstractAxisInput; AbstractTexture; AbstractTextureImage; AxisSetting

B: BlendEquation; BlendEquationArguments

C: Camera; CameraLens; CameraSelector; CircularGauge; CircularGaugeStyle; ClipPlane; Component3D

D: DelayButton; DelayButtonStyle; Dial; DialStyle

E: Entity; EntityLoader

F: FilterKey; FrameAction; FrameGraphNode

G: Gauge; GaugeStyle; GraphicsApiFilter

I: ItemSelectionModel

K: KeyboardDevice; KeyboardHandler; KeyEvent

L: Layer; LayerFilter

M: Material; MouseDevice; MouseEvent; MouseHandler

N: Node; NodeInstantiator; NoDraw

P: PieMenu; PieMenuStyle; PointLight

R: RenderStateSet

S: ShaderProgram; Shortcut; SkyboxEntity; SpotLight; StatusIndicator; StatusIndicatorStyle

T: Texture1D; Texture1DArray; Texture2D; Texture2DArray; Texture2DMultisample; Texture2DMultisampleArray; Texture3D; TextureBuffer; TextureCubeMap; TextureCubeMapArray; TextureImage; TextureRectangle; ToggleButton; ToggleButtonStyle; TreeView; TreeViewStyle; Tumbler; TumblerColumn; TumblerStyle

W: WheelEvent

New QML Properties

	autoTransform
	colorFilter
	direction
	height
	polling
	scrollGestureEnabled
	shortcuts
	styleHints
	width

New QML Signals

	smartZoom()
	tagFound()
	tagRemoved()

New QML Methods

	getDataAsArrayBuffer()
	hsva()
	shapeToCircle()
	shapeToRectangle()
	supportedViewfinderFrameRateRanges()
	supportedViewfinderResolutions()

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