Qt Documentation

Qt 5.8
New Classes and Functions in Qt 5.5

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

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

B: QBlendEquationArguments (Qt3DRender)

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

E: QEntity (Qt3DCore)

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

G: QGraphicsApiFilter (Qt3DRender)

I: QInputAspect (Qt3DInput)

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

L: QLayer (Qt3DRender); QLayerFilter (Qt3DRender)

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

N: QNode (Qt3DCore); QNoDraw (Qt3DRender)

O: QOpenGLFunctions_4_4_Compatibility; QOpenGLFunctions_4_4_Core; QOpenGLFunctions_4_5_Compatibility; QOpenGLFunctions_4_5_Core

P: QPlatformGraphicsBuffer; QPlatformSurfaceEvent; QPointLight (Qt3DRender)

R: QRenderStateSet (Qt3DRender)

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

V: QVideoFilterRunnable

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

New Member Functions

Class QDBusConnection:

bool	registerObject(const QString &path, const QString &interface, QObject *object, RegisterOptions options = ExportAdaptors)

Class QMessageLogger:

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

Class QDebug:

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

Class QLoggingCategory:

bool	isInfoEnabled() const

Class QTextStream:

bool	readLineInto(QString *line, qint64 maxlen = 0)

Class QItemSelectionModel:

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

Class QJsonObject:

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

Class QMetaMethod:

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

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

Class QMetaEnum:

QMetaEnum fromType()

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 QVariant:

QPersistentModelIndex toPersistentModelIndex() const

Class QAssociativeIterable:

const_iterator find(const QVariant &key) const

Class QState:

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

Class QThread:

int	loopLevel() const

Class QThreadPool:

void	cancel(QRunnable *runnable)

Class QDateTime:

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

Class QPair:

void	swap(QPair &other)

Class QRegularExpression:

QRegularExpressionMatchIterator	globalMatch(const QStringRef &subjectRef, int offset = 0, MatchType matchType = NormalMatch, MatchOptions matchOptions = NoMatchOption) const
QRegularExpressionMatch	match(const QStringRef &subjectRef, int offset = 0, MatchType matchType = NormalMatch, MatchOptions matchOptions = NoMatchOption) const

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 QTimeZone:

QTimeZone	systemTimeZone()
QTimeZone	utc()

Class QVector:

void	append(const QVector<T> &value)

Class QVarLengthArray:

QVarLengthArray<T, Prealloc> & operator=(std::initializer_list<T> list)

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 QWheelEvent:

Qt::MouseEventSource source() const

Class QOpenGLContext:

QOpenGLContext *	globalShareContext()
bool	supportsThreadedOpenGL()

Class QPlatformIntegration:

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

Class QWindow:

void	requestUpdate()

Class QMatrix4x4:

bool	isAffine() const

Class QVector3D:

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 QVector2D:

QVector2D & operator/=(const QVector2D &vector)

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(const QVector3D &eulerAngles)
QQuaternion	fromEulerAngles(float pitch, float yaw, float roll)
QQuaternion	fromRotationMatrix(const QMatrix3x3 &rot3x3)
void	getAxes(QVector3D *xAxis, QVector3D *yAxis, QVector3D *zAxis) const
void	getAxisAndAngle(QVector3D *axis, float *angle) const
void	getAxisAndAngle(float x, float y, float z, float angle) const
void	getEulerAngles(float *pitch, float *yaw, float *roll) const
QQuaternion	inverted() const
QQuaternion	rotationTo(const QVector3D &from, const QVector3D &to)
QVector3D	toEulerAngles() const
QMatrix3x3	toRotationMatrix() const

Class QVector4D:

QVector4D & operator/=(const QVector4D &vector)

Class QOpenGLTexture:

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

Class QFontDatabase:

bool	isPrivateFamily(const QString &family) const

Class QPlatformFontDatabase:

QFont::Weight weightFromInteger(int weight)

Class QTextDocument:

QTextCursor	find(const QRegularExpression &expr, int from = 0, FindFlags options = FindFlags()) const
QTextCursor	find(const QRegularExpression &expr, const QTextCursor &cursor, FindFlags options = FindFlags()) const

Class QNetworkAccessManager:

void	preSharedKeyAuthenticationRequired(QNetworkReply *reply, QSslPreSharedKeyAuthenticator *authenticator)

Class QNetworkReply:

void	preSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator *authenticator)

Class QHostAddress:

void	setAddress(const quint8 *ip6Addr)

Class QSslConfiguration:

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

Class QSslSocket:

void	preSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator *authenticator)

Class QGraphicsScene:

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

Class QOpenGLWidget:

void	setUpdateBehavior(UpdateBehavior updateBehavior)
UpdateBehavior	updateBehavior() const

Class QSpacerItem:

QSizePolicy sizePolicy() const

Class QAbstractScrollArea:

QMargins viewportMargins() const

Class QFrame:

void	initStyleOption(QStyleOptionFrame *option) const

Class QPlainTextEdit:

QMenu * createStandardContextMenu(const QPoint &position)

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 QSGSimpleTextureNode:

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

Class QQuickWidget:

QQuickWindow * quickWindow() const

Class QGeoCircle:

QString toString() const

Class QGeoRectangle:

QString toString() const

Class QGeoShape:

QGeoCoordinate	center() const
QString	toString() const

Class QCamera:

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

Class QCameraImageProcessing:

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

Class QWebEngineProfile:

void	downloadRequested(QWebEngineDownloadItem *download)

Class QWebEnginePage:

virtual bool	acceptNavigationRequest(const QUrl &url, NavigationType type, bool isMainFrame)
QWebEngineProfile *	profile() const
void	setWebChannel(QWebChannel *channel)
QWebChannel *	webChannel() 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!=(const QSslPreSharedKeyAuthenticator &lhs, const QSslPreSharedKeyAuthenticator &rhs)
bool	operator!=(QSslEllipticCurve lhs, QSslEllipticCurve 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 QUuid &lhs, const QUuid &rhs)
int	qEnvironmentVariableIntValue(const char *varName, bool *ok = Q_NULLPTR)
uint	qHash(QSslEllipticCurve curve, uint seed = 0)
uint	qHash(const QSet<T> &key, uint seed = 0)
uint	qHashRange(InputIterator first, InputIterator last, uint seed = 0)
uint	qHashRangeCommutative(InputIterator first, InputIterator last, uint seed = 0)
QPixelFormat	qPixelFormatAlpha(uchar channelSize, QPixelFormat::TypeInterpretation typeInterpretation = QPixelFormat::UnsignedInteger)
QJSEngine *	qjsEngine(const QObject *object)
void	swap(QPair<T1, T2> &lhs, QPair<T1, T2> &rhs)

New Macros

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

New Enum Types

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

New Properties

center : QGeoCoordinate
radius : qreal
altitude : double
isValid : const bool
latitude : double
longitude : double
bottomLeft : QGeoCoordinate
bottomRight : QGeoCoordinate
center : QGeoCoordinate
height : double
topLeft : QGeoCoordinate

topRight : QGeoCoordinate
width : double
isEmpty : const bool
isValid : const bool
type : const ShapeType
selectedIndexes : const QModelIndexList
devicePixelRatio : const qreal
breakEnabled : bool
singleClickActivation : const bool
tabFocusBehavior : const Qt::TabFocusBehavior

New QML Types

New QML Properties

	autoTransform
	colorFilter
	direction
	height
	polling
	scrollGestureEnabled
	shortcuts
	styleHints
	width

New QML Signals

	tagFound()
	tagRemoved()
	smartZoom()

New QML Methods

list<object>	supportedViewfinderFrameRateRanges(size resolution = undefined)
list<size>	supportedViewfinderResolutions(real minimumFrameRate = undefined, real maximumFrameRate = undefined)
string	getDataAsArrayBuffer(string format)
color	hsva(real hue, real saturation, real value, real alpha)
geocircle	shapeToCircle(geoshape shape) const
georectangle	shapeToRectangle(geoshape shape) const

Additions to Other Qt 5 Releases

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