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// Copyright (C) 2025 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
/*!
\page whatsnew610.html
\title What's New in Qt 6.10
\ingroup whatsnewqt6
\brief Lists the new features in Qt 6.10.
\meta sortkey 610
\section1 New and Restored Modules in Qt 6.10
Qt 6.10 adds the following modules and tools:
\list
\endlist
\section1 New Features in Qt 6.10
\section2 Qt Core Module
\list
\li QLocale is now updated to CLDR v47
\li QLocale::uiLanguages() now includes truncated entries and is better-ordered
\li QLocale::toString() overloads for integral type now accept precision and width
\li The system locale is now distinguished in qDebug() output from the
CLDR-derived one for the same language, script and territory
\li QLocale::toString(double, ...)'s exponent separator now again matches the case
requested
\li QCalendar::daysInMonth() for unspecified year now gives the maximal value
\li The new QRangeModel class provides an implementation of QAbstractItemModel that can
operate on any C++ range.
\li QXmlStreamReader::readRawInnerData() for retrieving the raw inner XML content of an element.
\li Error handling API for QXmlStreamWriter with \l {QXmlStreamWriter::}{Error} enum,
\l {QXmlStreamWriter::}{error()}, \l {QXmlStreamWriter::}{errorString()},
and \l {QXmlStreamWriter::}{raiseError()} functions.
\li QXmlStreamWriter::stopWritingOnError() property, allowing users to control
whether output halts immediately after encountering an error.
\li Added \l QFuture::cancelChain() to cancel the entire continuation
chain using any non-finished QFuture from the chain.
\li The new qEnvironmentVariableIntegerValue returns the numerical value of an environment
variable, or \c{std::nullopt} if the variable is not set or doesn't hold an integer.
\li QFileInfo::isOther() returns true for file system entries that are neither a directory,
regular file, or symbolic link.
\li Added QSortFilterProxyModel::endFilterChange() taking a
\l{QSortFilterProxyModel::}{Direction} parameter, to balance a previous call to
\l{QSortFilterProxyModel::}{endFilterChange()}. These APIs replace
\l{QSortFilterProxyModel::}{invalidateFilter()}, which will be deprecated starting from
Qt 6.13.
\li Two new overloads of QMetaObject::connect() make it possible to connect the
QMetaMethod of a signal to a slot function or lambda.
\li QCborValue::toStringView() and QJsonValue::toStringView() return a view of the
string stored in the value, without any allocations.
\li Use \l{QDataStream::operator bool()} and \l{QTextStream::operator bool()}
to check whether the stream is in an error state.
\li Use \l{QByteArray::}{nullTerminate()} to add a null terminator to a
QByteArray or QString, e.g. after constructing them via
\l{QByteArray::fromRawData()}. Test whether the array or string is null
terminated with \l{QByteArray::}{nullTerminated()}.
\li QByteArray can now implicitly convert to a \l{qbytearray-operator-std-string_view}
{std::string_view}.
\endlist
\section2 Qt D-Bus Module
\list
\li QDBusConnectionInterface::serviceCredentials() returns the connection
credentials for the process currently holding the specified bus service.
\endlist
\section2 Qt Graphs Module
\list
\li Filled surface graph type added: \l{QSurface3DSeries::DrawFilledSurface}{DrawFilledSurface}
\li Text elide support for 2D axes added: \l{QAbstractAxis::textElideMode}
\li Pie slice label hiding support for small sized slices added:
\l{QPieSeries::angleSpanVisibleLimit}, \l{QPieSeries::angleSpanLabelVisibility}, \l{QPieSeries::LabelVisibility}
\li Multi-axis support for 2D graphs added: \l{QAbstractSeries::axisX}, \l{QAbstractSeries::axisY}
\li Hover support for 2D series added: \l{QAbstractSeries::isHovered}
\li Support for controlling plot area clipping in 2D graphs added: \l{GraphsView::}{clipPlotArea}
\li Support for querying data point coordinates in LineSeries added: \l{QLineSeries::dataPointCoordinatesAt}
\li Support for rendering a slice into an image in Bars3D and Surface3D added:
\l{Q3DBarsWidgetItem::renderSliceToImage}, \l{Q3DSurfaceWidgetItem::renderSliceToImage},
\l{QtGraphs3D::SliceCaptureType}
\li Added \l{Bars3DNode}, \l{Scatter3DNode}, and \l{Surface3DNode} for
adding 3D graphs in QtQuick3D applications inside View3Ds
\li Graph draw ordering support for 2D graphs added: \l{QAbstractSeries::zValue}
\li Categorized logging support added
\endlist
\section2 Qt GRPC Module
\list
\li Performance improvements and bug-fixes for the \l{QGrpcHttp2Channel}.
\li Added the \c{unix-abstract} \l[QtGrpc]{Transportation scheme}
to \l{QGrpcHttp2Channel}.
\li Added \l{QGrpcOperation::}{serverInitialMetadata} and
\l{QGrpcOperation::}{serverTrailingMetadata} interfaces to
\l{QGrpcOperation}.
\li Added \l{QGrpcCallOptions::filterServerMetadata} and
\l{QGrpcChannelOptions::filterServerMetadata} options to control the
filtering of the received server-metadata.
\li Added \l{QGrpcCallOptions::addMetadata} and
\l{QGrpcChannelOptions::addMetadata} for supporting incremental
client-metadata updates.
\li Deprecated \l{QGrpcChannelOptions::}{metadata} interfaces in favor
of QMultiHash based interfaces: \l{QGrpcChannelOptions::metadata(QtGrpc::MultiValue_t)}
{metadata(QtGrpc::MultiValue)},
\l{QGrpcChannelOptions::setMetadata(const QMultiHash<QByteArray,QByteArray>&)}
{setMetadata(QMultiHash)}.
\endlist
\section2 Qt GUI Module
\list
\li QStyleHints::accessibility provides access to user accessibility
preferences, such as whether the system has enabled a setting for increased
contrast.
\li Added \l {QAccessibilityHints} to access individual accessibility
settings.
\li QRhi: Added support for enumerating 3D graphics adapters (physical devices),
when running on Direct 3D 11, 12, or Vulkan, via the \l{QRhi::}{enumerateAdapters()}
function.
\li QPainterPath::setCachingEnabled() can be used to turn on the caching
of calculated values, increasing performance for certain operations
at the expense of additional memory use.
\li Added QPainterPath::trimmed() to return a section of the path.
\endlist
\section2 Qt HttpServer Module
\list
\li Added whitelist and blacklist of subnets in \l{QHttpServerConfiguration}.
\li Added configurable keep-alive timeout in \l{QHttpServerConfiguration}.
\li Made \l{QHttpServerRequest} copyable.
\endlist
\section2 Qt Lottie Animation
\list
\li Added support for solid, null and precomposition layers.
\li Added \l{lottietoqml} tool. This is an equivalent tool to \l{svgtoqml} and it converts
Lottie files to Qt Quick scenes described in QML. It is currently in tech preview.
\li Added a plugin for \l{VectorImage} which enables it to load Lottie files in addition
to SVG. This feature is tech preview and requires
\l{VectorImage::assumeTrustedSource}{assumeTrustedSource} to be set to \c true.
\li Added \l{lottietoqml Example} and \l{qtlottieviewer Example} to demonstrate usage
of \l{Qt Lottie Animation}.
\endlist
\section2 Qt Multimedia Module
\list
\li Added a native PipeWire audio backend.
\li Audio pitch compensation for the FFmpeg-based QMediaPlayer based on the excellent
The behavior can be customized via the \l {QMediaPlayer::}{pitchCompensation}
property.
\li \l {QCapturableWindow} can now be constructed from \l {QWindow} in both C++ and QML.
\li Added a new class \l {QPlaybackOptions} that allows users to control
low-level FFmpeg media playback options, for example, playback intent,
network timeout, and probe size.
\li In \l {QAudioSink} and \l {QAudioSource}, added methods that allow users
to operate with the underlying audio buffer in frame count instead of byte count.
\endlist
\section2 Qt Network Module
\list
\li Added fromFile() method to QSslCertificate.
\li Added setDateTimeValue() to QHttpHeaders, a convenience method for setting
date and time values in HTTP headers.
\li Added convenience methods to QHttpHeaders to retrieve values as
QDateTime, integers, or lists of these types.
\endlist
\section2 Qt Protobuf Module
\list
\li Added \l {Qt Protobuf Mutable Getters} to generated Protobuf
messages, making them accessible using the \c {mut} prefix.
\endlist
\section2 Qt Qml Module
\list
\li Added a new TreeModel QML type that allows the definition of a tree structure in
the QML file and works with TreeView.
\li Added SortFilterProxyModel QML type to sort and filter model data.
This feature is in tech preview.
\li Added the delegateModelAccess property to DelegateModel and all views. You can now
write through required properties into the model.
\li Added the \l{Synchronizer} QML type. Synchronizer keeps two or more properties in sync
without using bindings. This feature is in tech preview.
\li Added semicolon customization rules to qmlformat. You can now control whether
semicolons are added to the end of JS statements.
\li Added new qmllint warnings focused on improving compatibility with Qt Creator,
including checks for \QDS-specific limitations, additional JavaScript-related warnings,
and several new warnings related to QML enums and imports.
\li Removed support for manipulation of complex row structures from TableModel.
\li Changed the order of the role and value parameters in TableModel::setData to resolve
ambiguity.
\endlist
\section2 Qt Quick Module
\list
\li Added FlexboxLayout QML type to arrange the quick items in flexible
way as similar to
is in tech preview.
\endlist
\section2 Qt Quick Controls Module
\list
\li The FluentWinUI3 style has improved support for contrast themes on Windows 11.
\li Added \l {SearchField} Control
\endlist
\section2 Qt Quick Dialogs Module
\list
\li Added property \l [QML QtQuickDialogs]{Dialog::popupType}{popupType} which can be used to
control whether a non-native dialog should open in a separate window or as an item
in the existing scene. This has no effect when using native dialogs.
\endlist
\section2 Qt Quick Effects Module
\list
\endlist
\section2 Qt Quick 3D Module
\list
\li Added \l [QtQuick3D]{ParticleEmitter3D::}{emitMode} to shaped emitters to allow
particles to be emitted based on the surface normals of the shape.
\li Implemented \l [QtQuick3D]{ParticleEmitter3D::reversed}{reversed} emitters to enable
particles to run from end time to begin time.
\li Several lightmap-related improvements and changes:
\list
\li Introduced texels-per-unit based lightmap sizes, adding
the \l[QtQuick3D]{Model::texelsPerUnit} and \l[QtQuick3D]{Lightmapper::texelsPerUnit}
properties and replacing the now deprecated
\l[QtQuick3D]{Model::lightmapBaseResolution} property.
\li Introduced \l[QtQuick3D]{Lightmapper::source}{Lightmapper::source} property to set
one lightmap source for the whole scene, replacing and deprecating
\l[QtQuick3D]{BakedLightmap::loadPrefix}.
\li Added a builtin GPU-based Non-local Means (NLM) denoising for baked lightmaps,
controlled via the \l[QtQuick3D]{Lightmapper::denoiseSigma} property.
\li The lightmap baking window has been improved to show a progress bar and an
estimation of time remaining.
\li Baking is now done in its own RHI context and does not block rendering of the running
application.
\li RAM and VRAM usage has been decreased when baking certain scenes.
\li Added a lightmap viewer tool for debugging baked lightmap files via GUI or
command-line.
\endlist
\li Fixed color import for glTF2 baseColorFactor by correctly converting from linear to sRGB,
aligning it with the spec.
\li Added \l [QtQuick3D.Helpers]{CapsuleGeometry} to QtQuick3D.Helpers with fixed textures,
async creation support, and exposed uvProfile property.
\endlist
\section2 Qt Quick 3D XR Module
\list
\li Exposed \l [QtQuick3D.Xr]{XrSpatialAnchorListModel::requestSceneCapture}{method} for
requesting room scanning for spatial anchors.
\endlist
\section2 Qt Quick 3D Physics Module
\list
\li Deprecated CapsuleGeometry in favor of the improved one in QtQuick3D.
\endlist
\section2 Qt Quick VectorImage Module
\list
\li Added support for animated SVGs that matches animation support in Qt SVG.
\li Added \l{VectorImage::assumeTrustedSource}{API} to indicate whether source file is
trusted or not.
\li Added \l{VectorImage::animations}{API} to control animation behavior.
\li By including a plugin provided by \l{Qt Lottie Animation}, \l{VectorImage} can now also
show Lottie files. This feature is regarded as tech preview and requires
\l{VectorImage::assumeTrustedSource}{assumeTrustedSource} to be set to \c true.
\endlist
\section2 Qt Serial Port Module
\list
\li Added support for limiting write buffer size using \l {QSerialPort::}
{writeBufferSize} property.
\endlist
\section2 Qt Serial Bus Module
\list
\li Add missing move-constructor to \l{QCanBusDeviceInfo}.
\li Make \l{QCanBusFrame::FrameType} and \l{QCanBusFrame::FrameError} QMetaEnums.
\li The SocketCAN plugin no longer sets a default bitrate to avoid runtime warnings.
Setting the bitrate must be done by system means \c{ip link set ...} or by libsocketcan
and \l{QCanBusDevice::setConfigurationParameter}(QCanBusDevice::BitRateKey, ...).
\li The VirtualCAN plugin now supports up to ten virtual CAN channels from can0 to can9.
\endlist
\section2 Qt Sql Module
\list
\endlist
\section2 Qt SVG Module
\list
\li Added support for CSS animations for fill-opacity, stroke-opacity, and opacity properties.
\li Added an example that demonstrates how to view SVG files.
\endlist
\section2 Qt Test Module
\list
\li Data-driven benchmarks now identify both global and local data in plaintext names
\li Backtraces from lldb are now disabled on Apple Silicon
\li When QTest prints floating-point values in a comparison, it now gives full
precision and includes a hexfloat version
\endlist
\section2 Qt VirtualKeyboard Module
\list
\li Added PURL and CPE information to the attribution files of 3rd party sources.
\li Added Latvian keyboard layout.
\endlist
\section2 Qt WebEngine Module
\list
\li Added support for Chromium extensions, using \l{QWebEngineExtensionManager} and \l{QWebEngineExtensionInfo}
\li Added support for adding additional trusted CA certificates to a website profile
without adding them to the platform certificate store:
\l {QWebEngineProfileBuilder::}{setAdditionalTrustedCertificates}
\li Added support for Back/Forward cache enabled using \l{QWebEngineSettings::BackForwardCacheEnabled}
\endlist
\section2 Qt WebView Module
\list
\li Added WebView2 plugin for the Windows platform. The new backend uses a native
COM API from the Chromium based Edge browser called
Therefore, you can now provide web content without shipping Qt WebEngine.
\endlist
\section2 Qt Widgets Module
\list
\li Added support for increased contrast mode for the fusion, macOS, and Windows 11
widgets styles.
\li Default editor event handling in item views has moved into the new
\l{QAbstractItemDelegate::handleEditorEvent()} function, which custom
event handlers can use to continue with standard event handling.
\li Use \l{QListWidget::}{setSupportedDragActions()} in QListWidget,
QTableWidget, and QTreeWidget to change the supported drag actions.
\li The new QLayout::horizontalSizeConstraint and
QLayout::horizontalSizeConstraint properties allow individually setting
the horizontal and vertical size constraints of the widget.
\endlist
\section2 Qt XML Module
\list
\endlist
\section2 Qt MQTT Module
\list
\li Add support for WebSockets/Secure WebSockets
\endlist
\section1 Tools
\section2 QDoc Documentation Generator
\list
\li QDoc can now automatically add “view source” links to every C++ API
declaration. Enable the feature with the new \l {url.sources-variable}
{url.sources} family of configuration variables
(\c {url.sources.enabled}, \c {url.sources.rootdir},
\c {url.sources.linktext}).
\li QDoc now detects circular inheritance in QML types using Floyd’s
cycle-finding algorithm and reports the problem instead of getting
stuck in an infinite loop.
\li QML property groups defined in \c {.qml} files are recognised and
shown as a single grouped property when you document them with
\c \qmlproperty commands.
\li Source files generated by Qt tools (\c moc_, \c uic_, \c qrc_, etc.)
are now skipped automatically, which shortens QDoc build times on
large projects.
\li The data type shown for a QML property inside a \c {.qml} file can now
be overridden directly in the \c \qmlproperty command, even for
non-aliased properties.
\li The \l {documentationinheaders-variable} {documentationinheaders}
option is no longer offered as a technology preview; rather, it is
considered stable. It was first introduced in Qt 6.9.
\li When generating DocBook output, QDoc now includes overload notes.
\li Overloaded signals and slots now include a contextual snippet to show
their use.
\li QDoc can link against Clang libraries from LLVM 21.
\li The .index-files include the declared return type from \\fn-commands.
This is useful for multi-project builds, when authors override the
return type of a function with \c {auto}.
\li You can now document your QML enumerations with the new
\l {qmlenum-command}{\\qmlenum} command. QDoc creates a new section,
QML Enumerations, in the generated documentation.
\li Code snippets indentation is now normalized, stripping out excess
left margin whitespace. This means that snippets from source that is
heavily indented (e.g. in a deeply nested series of \c{if}-statements)
will present as if not nested.
\li QDoc now correctly parses template aliases with default parameters.
\li QDoc no longer auto-links to deprecated functions if there are
non-deprecated alternatives.
\li You can prevent machine translation of strings using the new
\l {notranslate-command}{\\notranslate-command}.
\endlist
\section2 Qt Linguist
\list
\li Added support for organizing ID-based translations with custom
labels in Qt Linguist and lupdate.
\li Introduced a QML form preview feature in Qt Linguist for visual
validation of translations in context.
\li Updated Qt Linguist with a refreshed UI, including new icons,
improved color palette, and better handling of dark mode.
\li lupdate and lrelease now support mixing ID-based and
text-based translations within the same document.
\li Removed the Clang-based parser from lupdate.
\li Unified support for meta strings (comments like //: and //~) across
different programming languages in lupdate.
\li Added new i18n examples to the documentation.
\li lrelease now provides the -fail-on-unfinished option to fail the
build if there are unfinished translations.
\li Deprecated using \c{//=} metastring comments to set IDs for
text-based translations.
\endlist
\section1 Platform Changes
\section2 Build System Changes
\list
\li Usage of a private Qt module Foo now requires a call to
\c{find_package(Qt6 COMPONENTS FooPrivate)} to make the
\c{Qt6::FooPrivate} target available.
\li Added a \c DISCARD_FILE_CONTENTS option to \c{qt_add_resources()}.
\li The \c FILENAME_VARIABLE option of
\c{qt6_generate_deploy_[app_]script}, which was deprecated in
Qt 6.6.0, has been removed.
\li Added the \c NO_PLUGINS argument to \c
qt_deploy_runtime_dependencies. This turns off plugin deployment
altogether.
\li Added the arguments \c INCLUDE_PLUGIN_TYPES,
\c EXCLUDE_PLUGIN_TYPES, \c INCLUDE_PLUGINS, and \c EXCLUDE_PLUGINS
to \c qt_deploy_runtime_dependencies.
\li Added arguments for selecting Qt plugins to
\c qt_generate_deploy_app_script.
\li \c qt6_import_plugins doesn't have any effect anymore on plugin
deployment with the CMake deployment API on Linux.
\li \c qt6_deploy_runtime_dependencies now supports the following plugin
selection flags on Linux: \c INCLUDE_PLUGINS,
\c INCLUDE_PLUGIN_TYPES, \c EXCLUDE_PLUGINS, \c EXCLUDE_PLUGIN_TYPES.
\li Added a \c DISCARD_QML_CONTENTS option to \c{qt_add_qml_module()},
that removes original QML and JS file contents from the target's
resource system.
\endlist
\section2 Desktop Platforms
\section3 Windows
\list
\li Windows on ARM pre-built binaries also include QtWebEngine and QtWebView.
\endlist
\section3 Linux
\list
\li Linux desktop pre-built binaries are now built using RHEL9, which raises
the minimum glibc requirement from 2.28 to 2.34.
\endlist
\section3 macOS
\list
\li Windows that opt into extended dynamic range (EDR) now trigger expose
event on screen brightness change
\li The titleUIElement accessibility property is now supported
\li Service menu integration is now rich-text aware
\li QOperatingSystemVersion::MacOSTahoe represents macOS 26
\li Mappings for WhatsThisCursor and BusyCursor have been added
\li QImage::toCGImage() now propagates the image's color space
\endlist
\section3 Wayland Client on Linux
\list
\endlist
\section2 Mobile Platforms
\section3 Android
\section4 Qt for Android
\list
\li Updated Gradle to version 8.14.2 and Android Gradle Plugin AGP to version 8.10.1.
\li Added support for Android 12 Splash Screen.
\li Added support for Android 16KB page sizes.
\li Added an example (QtJennyDemo) for accessing Android APIs via C++ wrappers
produced by a code generator (QtJenny).
\li Changed Android 16 (API 36) as maximum supported platform version.
\endlist
\section4 Qt Quick for Android
\list
\li Added multiple arguments support for signals under QtQuickView.
\li Added support to register signal listeners before QML is fully loaded.
\li Public Java APIs in javadoc format.
\endlist
\section3 iOS
\list
\li Added QPointingDevice support for Apple Pencil
\li Fixed rotation for standard Apple Pencil
\li Added support for hover feature for Apple Pencil 2nd gen or later
\li Windows that opt into extended dynamic range (EDR) now trigger expose
event on screen brightness change
\li Update requests will now be paused when the app moves out of active state
\li QScreen now also reports inverted screen orientations
\li RLIMIT_STACK now reflects the effective stack size
\li QImage::toCGImage() now propagates the image's color space
\endlist
\section2 Embedded Platforms
\section3 Boot to Qt
\list
\li Support was added for Yocto 5.2 (Walnascar).
\li \l{Support Levels for Target Hardware} was updated with supported boards for Tier 2:
\list
\li NXP i.MX 93 11x11 LPDDR4X EVK.
\endlist
\li \l{Support Levels for Target Hardware} was updated with supported boards for Tier 3:
\list
\li Toradex Colibri iMX6 ULL.
\endlist
\endlist
\section3 Real-Time Operating Systems
\list
\li Real-time operating system support is provided only for LTS releases. For non-LTS
releases, support is available exclusively through Professional Services.
\endlist
\section1 Modules Deprecated in Qt 6.10
The following modules are deprecated. We strongly advise against using them
in new code.
\list
\li \l{Qt Charts}
\li \l{Qt Data Visualization}
\endlist
The Qt Charts and Qt DataVisualization modules are deprecated. They continue
to be part of the licensed software, and remain part of the Qt Project.
However, for new code we recommend that you use \l{Qt Graphs}. Also, consult
the documentation for \{Qt Graphs Migration from Qt Charts}{migrating from
Qt Charts} and \l{Qt Graphs Migration from Qt DataVisualization}{migrating
from Qt Data Visualization}.
For more information about the life-cycle of modules in Qt, see
\section1 List of API Changes
These pages contain an overview of API changes in Qt 6.10:
\list
\li \l {New Classes and Functions in Qt 6.10}
\li \l {Obsolete Classes}
\endlist
\section1 Known Issues
For information about known issues in Qt 6.10 see
*/
/*!
\page newclasses610.html
\title New Classes and Functions in Qt 6.10
\ingroup whatsnewqt6-api
\meta sortkey 610
\brief A list of new APIs in Qt 6.10.
This page contains a comprehensive list of all new classes and functions
introduced in Qt 6.10.
\sincelist 6.10
*/