New Classes and Functions in Qt 6.3 | Qt 6.4

- Qt 6.4
- What's new in Qt 6
- New Classes and Functions in Qt 6.3
- Qt 6.4.0 Reference Documentation

# New Classes and Functions in Qt 6.3

This page contains a comprehensive list of all new classes and functions introduced in Qt 6.3.

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

### New Classes

O
  QOpcUaDataValue
  QOpcUaHistoryData
  QOpcUaHistoryReadRawRequest
  QOpcUaHistoryReadResponse

W
  QWaylandPresentationTime
  WhenAnyResult (QtFuture)

### New Member Functions

Class QAbstract3DGraph:

bool | hasSeries(QAbstract3DSeries *series) const

Class QBluetoothDeviceInfo:

QByteArray | serviceData(const QBluetoothUuid &serviceId) const
QMultiHash<QBluetoothUuid, QByteArray> | serviceData() const
QList<QBluetoothUuid> | serviceIds() const
bool | setServiceData(const QBluetoothUuid &serviceId, const QByteArray &data)

Class QByteArray:

bool | isValidUtf8() const

Class QByteArrayList:

QByteArray | join(QByteArrayView separator) const

Class QByteArrayMatcher:

qsizetype | indexIn(QByteArrayView data, qsizetype from) const

Class QByteArrayView:

bool | isValidUtf8() const
double | toDouble(bool *ok) const
float | toFloat(bool *ok) const
int | toInt(bool *ok, int base) const
long | toLong(bool *ok, int base) const
qlonglong | toLongLong(bool *ok, int base) const
short | toShort(bool *ok, int base) const
uint | toUInt(bool *ok, int base) const
ulong | toULong(bool *ok, int base) const
qulonglong | toULongLong(bool *ok, int base) const
ushort | toUShort(bool *ok, int base) const
QByteArrayView | trimmed() const

Class QCborArray:

QCborArray | fromJsonArray(QJsonArray &&array)

Class QCborMap:

QCborMap | fromJsonObject(QJsonObject &&obj)

Class QCollator:

int | defaultCompare(QStringView s1, QStringView s2)
QCollatorSortKey | defaultSortKey(QStringView key)

Class QCryptographicHash:

QByteArrayView | resultView() const

Class QDebug:

QDebug | operator<<(QDebug debug, const QVarLengthArray<T, P> &array)

Class QDir:

bool | mkdir(const QString &dirName, QFile::Permissions permissions) const

Class QDirIterator:

QFileInfo | nextFileInfo()

Class QDoubleValidator:

virtual void | fixup(QString &input) const override

Class QFile:

std::filesystem::path | filesystemSymLinkTarget() const
std::filesystem::path | filesystemSymLinkTarget(const std::filesystem::path &fileName)
bool | open(QIODeviceBase::OpenMode mode, QFileDevice::Permissions permissions)

Class QFontComboBox:

std::optional<QFont> | displayFont(const QString &fontFamily) const
QString | sampleTextForFont(const QString &fontFamily) const
QString | sampleTextForSystem(QFontDatabase::WritingSystem writingSystem) const
void | setDisplayFont(const QString &fontFamily, const QFont &font)
void | setSampleTextForFont(const QString &fontFamily, const QString &sampleText)
void | setSampleTextForSystem(QFontDatabase::WritingSystem writingSystem, const QString &sampleText)

Class QFontMetrics:

QRect | boundingRect(const QString &text, const QTextOption &option) const
int | horizontalAdvance(const QString &text, const QTextOption &option) const
QRect | tightBoundingRect(const QString &text, const QTextOption &option) const

Class QFontMetricsF:

QRectF | boundingRect(const QString &text, const QTextOption &option) const
qreal | horizontalAdvance(const QString &text, const QTextOption &option) const
QRectF | tightBoundingRect(const QString &text, const QTextOption &option) const

Class QInputDevice:

QStringList | seatNames()

Class QLatin1StringView:

qsizetype | lastIndexOf(QChar ch, Qt::CaseSensitivity cs) const

Class QLocalServer:

int | listenBacklogSize() const
void | setListenBacklogSize(int size)

Class QLocale:

QLocale::Language | codeToLanguage(QStringView languageCode, QLocale::LanguageCodeTypes codeTypes)
QString | languageToCode(QLocale::Language language, QLocale::LanguageCodeTypes codeTypes)

Class QEGLContext:

virtual EGLConfig | config() const = 0
virtual EGLDisplay | display() const = 0

Class QNetworkInformation:

bool | loadDefaultBackend()
QNetworkInformation::Features | supportedFeatures() const

Class QNetworkReply:

void | requestSent()
void | socketStartedConnecting()

Class QObject:

QList<T> | findChildren(Qt::FindChildOptions options) const

Class QOpcUaClient:

QOpcUaHistoryReadResponse * | readHistoryData(const QOpcUaHistoryReadRawRequest &request)

Class QOpcUaLocalizedText:

QDebug | operator<<(QDebug debug, const QOpcUaLocalizedText &text)

Class QOpcUaNode:

QOpcUaHistoryReadResponse * | readHistoryRaw(const QDateTime &startTime, const QDateTime &endTime, quint32 numValues, bool returnBounds)

Class QOpcUaQualifiedName:

QDebug | operator<<(QDebug debug, const QOpcUaQualifiedName &name)

Class QProcessEnvironment:

bool | inheritsFromParent() const

Class QQuickItem:

void | dumpItemTree() const
void | ensurePolished()

Class QQuickRenderTarget:

qreal | devicePixelRatio() const
void | setDevicePixelRatio(qreal ratio)

Class QRegularExpressionMatch:

bool | hasCaptured(const QString &name) const
bool | hasCaptured(QStringView name) const
bool | hasCaptured(int nth) const

Class QSemaphore:

bool | tryAcquire(int n, std::chrono::duration<Rep, Period> timeout)
bool | try_acquire()
bool | try_acquire_for(const std::chrono::duration<Rep, Period> &timeout)
bool | try_acquire_until(const std::chrono::time_point<Clock, Duration> &tp)

Class QString:

qsizetype | lastIndexOf(QChar c, Qt::CaseSensitivity cs) const

Class QStringView:

qsizetype | lastIndexOf(QChar c, Qt::CaseSensitivity cs) const

Class QTableWidgetSelectionRange:

bool | operator!=(const QTableWidgetSelectionRange &lhs, const QTableWidgetSelectionRange &rhs)
bool | operator==(const QTableWidgetSelectionRange &lhs, const QTableWidgetSelectionRange &rhs)

Class QTcpServer:

int | listenBacklogSize() const
void | setListenBacklogSize(int size)

Class QThreadPool:

void | startOnReservedThread(QRunnable *runnable)
void | startOnReservedThread(std::function<void ()> functionToRun)

Class QUrl:

QString | fromAce(const QByteArray &domain, QUrl::AceProcessingOptions options)
QByteArray | toAce(const QString &domain, QUrl::AceProcessingOptions options)

Class QUtf8StringView:

bool | isValidUtf8() const

Class QVarLengthArray:

QVarLengthArray::iterator | emplace(QVarLengthArray::const_iterator pos, Args &&... args)
T & | emplace_back(Args &&... args)

Class QWidget:

QAction * | addAction(const QString &text)
QAction * | addAction(const QIcon &icon, const QString &text)
QAction * | addAction(const QString &text, const QObject *receiver, const char *member, Qt::ConnectionType type)
QAction * | addAction(const QIcon &icon, const QString &text, const QObject *receiver, const char *member, Qt::ConnectionType type)
QAction * | addAction(const QString &text, Args &&... args)
QAction * | addAction(const QIcon &icon, const QString &text, Args &&... args)
QAction * | addAction(const QString &text, const QKeySequence &shortcut)
QAction * | addAction(const QIcon &icon, const QString &text, const QKeySequence &shortcut)
QAction * | addAction(const QString &text, const QKeySequence &shortcut, const QObject *receiver, const char *member, Qt::ConnectionType type)
QAction * | addAction(const QIcon &icon, const QString &text, const QKeySequence &shortcut, const QObject *receiver, const char *member, Qt::ConnectionType type)
QAction * | addAction(const QString &text, const QKeySequence &shortcut, Args &&... args)
QAction * | addAction(const QIcon &icon, const QString &text, const QKeySequence &shortcut, Args &&... args)

### New Functions in Namespaces

void | failOnWarning(const char *message)
void | failOnWarning(const QRegularExpression &messagePattern)
QFuture<OutputSequence> | whenAll(Futures &&... futures)
QFuture<OutputSequence> | whenAll(InputIt first, InputIt last)
QFuture<std::variant<std::decay_t<Futures>...>> | whenAny(Futures &&... futures)
QFuture<QtFuture::WhenAnyResult<T>> | whenAny(InputIt first, InputIt last)

### New Global Functions

const char * | qWebEngineChromiumSecurityPatchVersion()

### New Macros

| QT_TRID_N_NOOP(id)
| QVERIFY_THROWS_EXCEPTION(exceptiontype, ...)
| QVERIFY_THROWS_NO_EXCEPTION(...)
| Q_APPLICATION_STATIC(Type, VariableName, ...)
| Q_GADGET_EXPORT(EXPORT_MACRO)

### New Enum Types

enum class | TransportMedium { Unknown, Ethernet, Cellular, WiFi, Bluetooth }
enum | Initialization { InheritFromParent }
enum | AceProcessingOption { IgnoreIDNWhitelist, AceTransitionalProcessing }

### New Properties

- barSeriesMargin : const
- rowColors : const
- autoScaleY : const
- maxYValue : const

- minYValue : const
- isMetered : const
- transportMedium : const
- wireframeColor : const

### New Variables

| MacOSMonterey
| Windows10_1809
| Windows10_1903
| Windows10_1909
| Windows10_2004
| Windows10_20H2
| Windows10_21H1
| Windows10_21H2
| Windows11

### New QML Types

D
  DynamicBurst3D

F
  FolderDialog

M
  MessageDialog

P
  ParticleCustomShape3D
  PresentationTime

Q
  QtShell
  QtShellChrome
  QtShellSurface

T
  TreeView
  TreeViewDelegate

### New QML Properties

QML Type Bar3DSeries:

| rowColors : list<ThemeColor>

QML Type Bars3D:

| barSeriesMargin : size

QML Type FileInstancing:

| instanceCount : int

QML Type HeightMapSurfaceDataProxy:

| autoScaleY : real
| maxYValue : real
| minYValue : real

QML Type HoverHandler:

| blocking : bool

QML Type InstanceList:

| instanceCount : int

QML Type ParticleSystem3DLogging:

| timeDeviation : real

QML Type SpriteParticle3D:

| lights : list<Light>
| offsetX : float
| offsetY : float

QML Type Surface3DSeries:

| wireframeColor : color

QML Type TextMetrics:

| renderType : enumeration

QML Type WheelHandler:

| blocking : bool

### New QML Methods

QML Type AbstractGraph3D:

bool | hasSeries(Abstract3DSeries series)

QML Type Instancing:

color | instanceColor(int index)
vector3d | instanceCustomData(int index)
vector3d | instancePosition(int index)
quaternion | instanceRotation(int index)
vector3d | instanceScale(int index)

QML Type Item:

| dumpItemTree()

QML Type TestCase:

| failOnWarning(message)