Qt 5.15
New Classes and Functions in Qt 5.2
Qt 5.15.1 Reference Documentation

New Classes and Functions in Qt 5.2

This page contains a comprehensive list of all new classes and functions introduced in Qt 5.2. 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 Properties
New QML Types
New QML Properties
New QML Signals
New QML Methods

New Namespaces

namespace	QBluetooth
namespace	QtMac

New Classes

A: Alternative (QBluetoothServiceInfo); QAndroidJniEnvironment; QAndroidJniObject; QAssociativeIterable

B: QBluetoothAddress; QBluetoothDeviceDiscoveryAgent; QBluetoothDeviceInfo; QBluetoothHostInfo; QBluetoothLocalDevice; QBluetoothServer; QBluetoothServiceDiscoveryAgent; QBluetoothServiceInfo; QBluetoothSocket; QBluetoothTransferManager; QBluetoothTransferReply; QBluetoothTransferRequest; QBluetoothUuid

C: const_iterator (QSequentialIterable); const_iterator (QAssociativeIterable); QCollator; QCollatorSortKey; QCommandLineOption; QCommandLineParser

F: QFileSelector

G: QGeoAddress; QGeoAreaMonitorInfo; QGeoAreaMonitorSource; QGeoCircle; QGeoCoordinate; QGeoLocation; QGeoPositionInfo; QGeoPositionInfoSource; QGeoPositionInfoSourceFactory; QGeoRectangle; QGeoSatelliteInfo; QGeoSatelliteInfoSource; QGeoShape

K: QKeySequenceEdit

L: QLoggingCategory

M: QMacPasteboardMime

N: QNativeGestureEvent; QNdefFilter; QNdefNfcTextRecord; QNdefNfcUriRecord; QNdefRecord; QNearFieldManager; QNearFieldTarget; QNmeaPositionInfoSource

O: QOpenGLTexture

Q: QQmlFileSelector; QQmlNdefRecord; QQuickFramebufferObject

R: Renderer (QQuickFramebufferObject)

S: QSequentialIterable; QStaticPlugin; Sequence (QBluetoothServiceInfo)

T: QTimeZone

W: QWinJumpList; QWinJumpListCategory; QWinJumpListItem; QWinTaskbarButton; QWinTaskbarProgress; QWinThumbnailToolBar; QWinThumbnailToolButton

New Member Functions

Class QBitArray:

QBitArray & operator=(QBitArray &&other)

Class QByteArray:

QByteArray	fromBase64(const QByteArray &base64, QByteArray::Base64Options options)
QByteArray &	operator=(QByteArray &&other)
QByteArray	toBase64(QByteArray::Base64Options options) const

Class QCommandLineOption:

QCommandLineOption & operator=(QCommandLineOption &&other)

Class QContiguousCache:

QContiguousCache<T> & operator=(QContiguousCache<T> &&other)

Class QDateTime:

QDateTime	fromMSecsSinceEpoch(qint64 msecs, Qt::TimeSpec spec, int offsetSeconds)
QDateTime	fromMSecsSinceEpoch(qint64 msecs, const QTimeZone &timeZone)
bool	isDaylightTime() const
int	offsetFromUtc() const
void	setOffsetFromUtc(int offsetSeconds)
void	setTimeZone(const QTimeZone &toZone)
QTimeZone	timeZone() const
QString	timeZoneAbbreviation() const
QDateTime	toOffsetFromUtc(int offsetSeconds) const
QDateTime	toTimeZone(const QTimeZone &timeZone) const

Class QDir:

QDir & operator=(QDir &&other)

Class QEasingCurve:

QEasingCurve & operator=(QEasingCurve &&other)

Class QExplicitlySharedDataPointer:

QExplicitlySharedDataPointer<T> & operator=(QExplicitlySharedDataPointer<T> &&other)

Class QFileInfo:

bool	exists(const QString &file)
QFileInfo &	operator=(QFileInfo &&other)

Class QHash:

QHash<K, V> & operator=(QHash<K, V> &&other)

Class QJsonValue:

int	toInt(int defaultValue) const

Class QLinkedList:

QLinkedList<T> & operator=(QLinkedList<T> &&other)

Class QList:

QList<T> & operator=(QList<T> &&other)

Class QMap:

T &	first()
const T &	first() const
const Key &	firstKey() const
T &	last()
const T &	last() const
const Key &	lastKey() const
QMap<Key, T> &	operator=(QMap<Key, T> &&other)

Class QMetaType:

bool	compare(const void *lhs, const void *rhs, int typeId, int *result)
bool	convert(const void *from, int fromTypeId, void to, int toTypeId*)
bool	debugStream(QDebug &dbg, const void *rhs, int typeId)
bool	hasRegisteredComparators()
bool	hasRegisteredComparators(int typeId)
bool	hasRegisteredConverterFunction(int fromTypeId, int toTypeId)
bool	hasRegisteredConverterFunction()
bool	hasRegisteredDebugStreamOperator()
bool	hasRegisteredDebugStreamOperator(int typeId)
bool	registerComparators()
bool	registerConverter()
bool	registerConverter(MemberFunction function)
bool	registerConverter(MemberFunctionOk function)
bool	registerConverter(UnaryFunction function)

Class QMimeType:

QMimeType & operator=(QMimeType &&other)

Class QObject:

QMetaObject::Connection connect(const QObject *sender, PointerToMemberFunction signal, const QObject *context, Functor functor, Qt::ConnectionType type)

Class QPair:

QPair<T1, T2> &	operator=(const QPair<TT1, TT2> &p)
QPair<T1, T2> &	operator=(QPair<TT1, TT2> &&p)

Class QPersistentModelIndex:

QPersistentModelIndex & operator=(QPersistentModelIndex &&other)

Class QProcess:

QProcess::InputChannelMode	inputChannelMode() const
QString	nullDevice()
void	setInputChannelMode(QProcess::InputChannelMode mode)

Class QRegExp:

QRegExp & operator=(QRegExp &&other)

Class QSharedDataPointer:

QSharedDataPointer<T> & operator=(QSharedDataPointer<T> &&other)

Class QString:

QString	fromCFString(CFStringRef string)
QString	fromNSString(const NSString *string)
QString &	operator=(QString &&other)
CFStringRef	toCFString() const
NSString *	toNSString() const

Class QStringRef:

QStringRef	left(int n) const
QStringRef	mid(int position, int n) const
QStringRef	right(int n) const

Class QThread:

bool	isInterruptionRequested() const
void	requestInterruption()

Class QThreadPool:

void	clear()

Class QUrl:

QUrl	adjusted(QUrl::FormattingOptions options) const
QString	fileName(QUrl::ComponentFormattingOptions options) const
QUrl	fromCFURL(CFURLRef url)
QUrl	fromNSURL(const NSURL *url)
bool	matches(const QUrl &url, QUrl::FormattingOptions options) const
QUrl &	operator=(QUrl &&other)
CFURLRef	toCFURL() const
NSURL *	toNSURL() const

Class QUrlQuery:

QUrlQuery & operator=(QUrlQuery &&other)

Class QVariant:

QVariant & operator=(QVariant &&other)

Class QVector:

int	length() const
QVector<T> &	operator=(QVector<T> &&other)
void	removeAt(int i)
T	takeAt(int i)

Class QAbstractTextDocumentLayout:

void	unregisterHandler(int objectType, QObject *component)

Class QCursor:

QCursor & operator=(QCursor &&other)

Class QBrush:

QBrush & operator=(QBrush &&other)

Class QColor:

QString name(QColor::NameFormat format) const

Class QFont:

QFont & operator=(QFont &&other)

Class QFontDatabase:

QFont systemFont(QFontDatabase::SystemFont type)

Class QFontMetrics:

QFontMetrics & operator=(QFontMetrics &&other)

Class QGuiApplication:

Qt::ApplicationState	applicationState()
void	applicationStateChanged(Qt::ApplicationState state)
void	sync()

Class QIcon:

QIcon & operator=(QIcon &&other)

Class QImage:

QImage & operator=(QImage &&other)

Class QKeySequence:

QKeySequence & operator=(QKeySequence &&other)

Class QNativeGestureEvent:

Qt::NativeGestureType	gestureType() const
const QPoint	globalPos() const
const QPointF &	localPos() const
const QPoint	pos() const
const QPointF &	screenPos() const
qreal	value() const
const QPointF &	windowPos() const

Class QPainterPath:

QPainterPath & operator=(QPainterPath &&other)

Class QPalette:

QPalette & operator=(QPalette &&other)

Class QPen:

QPen & operator=(QPen &&other)

Class QPicture:

QPicture & operator=(QPicture &&other)

Class QPixmap:

QPixmap & operator=(QPixmap &&other)

Class QPlatformFontDatabase:

void	registerAliasToFontFamily(const QString &familyName, const QString &alias)

Class QPlatformIntegration:

virtual QPlatformSessionManager *	createPlatformSessionManager(const QString &id, const QString &key) const
virtual void	sync()

Class QPlatformTheme:

virtual QList<QKeySequence> keyBindings(QKeySequence::StandardKey key) const

Class QRegion:

QRegion & operator=(QRegion &&other)

Class QTouchDevice:

int	maximumTouchPoints() const

Class QVector2D:

float &	operator[](int i)
float	operator[](int i) const

Class QVector3D:

float &	operator[](int i)
float	operator[](int i) const

Class QVector4D:

float &	operator[](int i)
float	operator[](int i) const

Class QWheelEvent:

Qt::ScrollPhase phase() const

Class QNetworkAccessManager:

void	connectToHost(const QString &hostName, quint16 port)
void	connectToHostEncrypted(const QString &hostName, quint16 port, const QSslConfiguration &sslConfiguration)
QStringList	supportedSchemes() const
QStringList	supportedSchemesImplementation() const

Class QNetworkConfiguration:

QNetworkConfiguration::BearerType bearerTypeFamily() const

Class QSslConfiguration:

QByteArray	sessionTicket() const
int	sessionTicketLifeTimeHint() const
void	setSessionTicket(const QByteArray &sessionTicket)

Class QQuickWindow:

void	resetOpenGLState()

Class QPressureReading:

void	setTemperature(qreal temperature)

Class QSerialPort:

QSerialPort::Handle handle() const

Class QWidget:

void	windowIconChanged(const QIcon &icon)
void	windowTitleChanged(const QString &title)

Class QAbstractItemView:

virtual QSize viewportSizeHint() const override

Class QAbstractScrollArea:

virtual QSize viewportSizeHint() const

Class QButtonGroup:

void	buttonToggled(QAbstractButton *button, bool checked)

Class QFileDialog:

void	currentUrlChanged(const QUrl &url)
QUrl	directoryUrl() const
void	directoryUrlEntered(const QUrl &directory)
QUrl	getExistingDirectoryUrl(QWidget *parent, const QString &caption, const QUrl &dir, QFileDialog::Options options, const QStringList &supportedSchemes)
QUrl	getOpenFileUrl(QWidget *parent, const QString &caption, const QUrl &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options, const QStringList &supportedSchemes)
QList<QUrl>	getOpenFileUrls(QWidget *parent, const QString &caption, const QUrl &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options, const QStringList &supportedSchemes)
QUrl	getSaveFileUrl(QWidget *parent, const QString &caption, const QUrl &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options, const QStringList &supportedSchemes)
QStringList	mimeTypeFilters() const
void	selectMimeTypeFilter(const QString &filter)
void	selectUrl(const QUrl &url)
QList<QUrl>	selectedUrls() const
void	setDirectoryUrl(const QUrl &directory)
void	setMimeTypeFilters(const QStringList &filters)
void	urlSelected(const QUrl &url)
void	urlsSelected(const QList<QUrl> &urls)

Class QFileIconProvider:

QFileIconProvider::Options	options() const
void	setOptions(QFileIconProvider::Options options)

Class QHeaderView:

int	resizeContentsPrecision() const
void	setResizeContentsPrecision(int precision)

Class QInputDialog:

QString getMultiLineText(QWidget *parent, const QString &title, const QString &label, const QString &text, bool *ok, Qt::WindowFlags flags, Qt::InputMethodHints inputMethodHints)

Class QLayout:

QLayoutItem * replaceWidget(QWidget *from, QWidget *to, Qt::FindChildOptions options)

Class QLineEdit:

void	addAction(QAction *action, QLineEdit::ActionPosition position)
QAction *	addAction(const QIcon &icon, QLineEdit::ActionPosition position)

Class QListView:

virtual QSize viewportSizeHint() const override

Class QMainWindow:

QWidget * takeCentralWidget()

Class QMenu:

void	setAsDockMenu()
NSMenu *	toNSMenu()

Class QMenuBar:

NSMenu * toNSMenu()

Class QMessageBox:

QCheckBox *	checkBox() const
void	setCheckBox(QCheckBox *cb)

Class QSizePolicy:

bool	retainSizeWhenHidden() const
void	setRetainSizeWhenHidden(bool retainSize)

Class QSplashScreen:

QString message() const

Class QTabBar:

void	tabBarClicked(int index)
void	tabBarDoubleClicked(int index)

Class QTabWidget:

void	tabBarClicked(int index)
void	tabBarDoubleClicked(int index)

Class QToolTip:

void	showText(const QPoint &pos, const QString &text, QWidget w, const QRect &rect, int msecDisplayTime*)

Class QTreeView:

void	setTreePosition(int index)
int	treePosition() const

Class QX11Info:

unsigned long	getTimestamp()
bool	isPlatformX11()

New Functions in Namespaces

QColor	colorizationColor(bool *opaqueBlend)
HBITMAP	createMask(const QBitmap &bitmap)
void	disableBlurBehindWindow(QWidget *window)
void	disableBlurBehindWindow(QWindow *window)
void	enableBlurBehindWindow(QWidget *window)
void	enableBlurBehindWindow(QWidget *window, const QRegion &region)
void	enableBlurBehindWindow(QWindow *window)
void	enableBlurBehindWindow(QWindow *window, const QRegion &region)
QString	errorStringFromHresult(int hresult)
void	extendFrameIntoClientArea(QWidget *window, int left, int top, int right, int bottom)
void	extendFrameIntoClientArea(QWidget *window, const QMargins &margins)
void	extendFrameIntoClientArea(QWindow *window, const QMargins &margins)
void	extendFrameIntoClientArea(QWindow *window, int left, int top, int right, int bottom)
QPixmap	fromHBITMAP(HBITMAP bitmap, QtWin::HBitmapFormat format)
QPixmap	fromHICON(HICON icon)
QRegion	fromHRGN(HRGN hrgn)
QImage	imageFromHBITMAP(int hdc, HBITMAP bitmap, int width, int height)
bool	isCompositionEnabled()
bool	isCompositionOpaque()
bool	isWindowExcludedFromPeek(QWidget *window)
bool	isWindowExcludedFromPeek(QWindow *window)
bool	isWindowPeekDisallowed(QWidget *window)
bool	isWindowPeekDisallowed(QWindow *window)
void	markFullscreenWindow(QWidget *window, bool fullscreen)
void	markFullscreenWindow(QWindow *window, bool fullscreen)
QColor	realColorizationColor()
void	resetExtendedFrame(QWidget *window)
void	resetExtendedFrame(QWindow *window)
void	setCompositionEnabled(bool enabled)
void	setCurrentProcessExplicitAppUserModelID(const QString &id)
void	setWindowDisallowPeek(QWidget *window, bool disallow)
void	setWindowDisallowPeek(QWindow *window, bool disallow)
void	setWindowExcludedFromPeek(QWidget *window, bool exclude)
void	setWindowExcludedFromPeek(QWindow *window, bool exclude)
void	setWindowFlip3DPolicy(QWidget *window, QtWin::WindowFlip3DPolicy policy)
void	setWindowFlip3DPolicy(QWindow *window, QtWin::WindowFlip3DPolicy policy)
QString	stringFromHresult(int hresult)
void	taskbarActivateTab(QWidget *window)
void	taskbarActivateTab(QWindow *window)
void	taskbarActivateTabAlt(QWidget *window)
void	taskbarActivateTabAlt(QWindow *window)
void	taskbarAddTab(QWidget *window)
void	taskbarAddTab(QWindow *window)
void	taskbarDeleteTab(QWidget *window)
void	taskbarDeleteTab(QWindow *window)
HBITMAP	toHBITMAP(const QPixmap &p, QtWin::HBitmapFormat format)
HICON	toHICON(const QPixmap &p)
HRGN	toHRGN(const QRegion &region)
QtWin::WindowFlip3DPolicy	windowFlip3DPolicy(QWidget *window)
QtWin::WindowFlip3DPolicy	windowFlip3DPolicy(QWindow *window)

New Global Functions

quint64	qFloatDistance(double a, double b)
quint32	qFloatDistance(float a, float b)
quint64	qFloatDistance(double a, double b)
quint32	qFloatDistance(float a, float b)
uint	qPopulationCount(quint64 v)
uint	qPopulationCount(quint16 v)
uint	qPopulationCount(quint32 v)
uint	qPopulationCount(quint8 v)
uint	qPopulationCount(quint64 v)
uint	qPopulationCount(quint16 v)
uint	qPopulationCount(quint32 v)
uint	qPopulationCount(quint8 v)

New Macros

	Q_DECLARE_LOGGING_CATEGORY(name)
	Q_DECLARE_LOGGING_CATEGORY(name)
	Q_FORWARD_DECLARE_CF_TYPE(type)
	Q_FORWARD_DECLARE_CF_TYPE(type)
	Q_FORWARD_DECLARE_MUTABLE_CF_TYPE(type)
	Q_FORWARD_DECLARE_MUTABLE_CF_TYPE(type)
	Q_FORWARD_DECLARE_OBJC_CLASS(classname)
	Q_FORWARD_DECLARE_OBJC_CLASS(classname)
	Q_LOGGING_CATEGORY(name, string)
	Q_LOGGING_CATEGORY(name, string)
	qCCritical(category)
	qCCritical(category)
	qCDebug(category)
	qCDebug(category)
	qCWarning(category)
	qCWarning(category)

New Enum Types

enum	SizeAdjustPolicy { AdjustIgnored, AdjustToContentsOnFirstShow, AdjustToContents }
enum	Base64Option { Base64Encoding, Base64UrlEncoding, KeepTrailingEquals, OmitTrailingEquals, IgnoreBase64DecodingErrors, AbortOnBase64DecodingErrors }
enum	Option { DontUseCustomDirectoryIcons }
enum	SystemFont { GeneralFont, FixedFont, TitleFont, SmallestReadableFont }
enum	ActionPosition { LeadingPosition, TrailingPosition }
enum	InputChannelMode { ManagedInputChannel, ForwardedInputChannel }
enum	NativeGestureType { BeginNativeGesture, EndNativeGesture, PanNativeGesture, ZoomNativeGesture, SmartZoomNativeGesture, …, SwipeNativeGesture }
enum	ScrollPhase { NoScrollPhase, ScrollBegin, ScrollUpdate, ScrollEnd, ScrollMomentum }
enum	HBitmapFormat { HBitmapNoAlpha, HBitmapPremultipliedAlpha, HBitmapAlpha }
enum	WindowFlip3DPolicy { FlipDefault, FlipExcludeBelow, FlipExcludeAbove }

New Properties

sizeAdjustPolicy : const
currentData : const
filterMode : const
maximumSectionSize : const
clearButtonEnabled : const
unifiedTitleAndToolBarOnMac : const

temperature : const
nativeOrientation : const
displayIntegerBase : const
placeholderText : const
toolTipDuration : const

New QML Types

A: Address; Animator

B: BluetoothDiscoveryModel; BluetoothService; BluetoothSocket; BusyIndicator; BusyIndicatorStyle

F: FontDialog

L: Location

M: MessageDialog

N: NdefFilter; NdefMimeRecord; NdefTextRecord; NdefUriRecord; NearField

O: OpacityAnimator

P: Position; PositionSource

Q: QtPositioning

R: RotationAnimator

S: ScaleAnimator; SpinBoxStyle; StatusBarStyle; Switch; SwitchStyle

T: TextAreaStyle; ToolBarStyle

U: UniformAnimator

X: XAnimator

Y: YAnimator

New QML Properties

	autoOrientation
	colorData
	dragType
	formats
	hasColor
	hasHtml
	hasText
	hasUrls
	hoveredLink
	hoveredLink
	html
	mimeData
	pixelDensity
	proposedAction
	showFiles
	showHidden
	text
	urls

New QML Signals

	editingFinished()
	linkHovered()
	linkHovered()

New QML Methods

	acceptProposedAction()
	append()
	getDataAsString()
	matches()

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