path: root/doc/src/whatsnew/whatsnew65.qdoc

// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only

/*!
    \page whatsnew65.html
    \title What's New in Qt 6.5
    \brief Lists the new features in Qt 6.5.
    \ingroup whatsnewqt6

    \section1 New and Restored Modules in Qt 6.5

    Qt 6.5 adds the following modules and tools:

    \list
        \li \l {Qt Quick Effect Maker} - A tool to create high-performance
            shader effects for Qt Quick.
        \li \l {Qt Quick Effects QML Types}{Qt Quick Effects} - A module
            containing \l{MultiEffect}, for applying one or more simple
            graphical effects on a Qt Quick \l{Item}.
        \li \l {Qt Quick 3D Physics} - A physics engine for use with Qt Quick
            3D. This module is no longer in technical preview.
        \li \l {Qt QML Core} - A module that exposes various \l {Qt Core} APIs
            to QML.
    \endlist

    \section2 New and Restored Modules in Technical Preview

    \note API and ABI stability is not guaranteed.

    \list
        \li \l {Qt Location}'s \l {QtLocation::}{Map} renders 2D maps into a Qt Quick
            application. \l {QtLocation::}{MapView} includes \l {Qt Quick Input Handlers}
            to implement the typical interactive features (zoom, pan, tilt).
        \li \l {Qt GRPC} supports communicating with gRPC services using classes
            generated based on service descriptions from protobuf
            .proto-specifications.
        \li \l {Qt Protobuf} supports generating, serializing, and
            deserializing Qt-based classes from protobuf .proto-specifications.
    \endlist

    \section1 New Features in Qt 6.5

    \section2 Qt Core Module

    \list
        \li QTimeZone can now package a Qt::TimeSpec and, when relevant, an
            offset in a lightweight time representation that unifies the various
            APIs of QDateTime and QDate that took either a QTimeZone or a
            Qt::TimeSpec and offset.
        \li Introduced \l {Application Permissions}{application permissions}
            API to allow applications to check or request permissions for
            features that require user consent before use.
        \li New cross-platform tracing backend in Common Trace Format (CTF).
        \li QBindable can now be constructed from any property with a NOTIFY
            signal. This lets you integrate existing, non-bindable
            properties with \l [QtCore] {Qt Bindable Properties}
            {bindable properties}.
        \li The \l{qt_generate_deploy_app_script} CMake function preferably accepts
            an argument called OUTPUT_SCRIPT now. Passing the old FILENAME_VARIABLE
            is deprecated.
    \endlist

    \section2 Qt GUI Module

    \list
        \li Reintroduced classes QWindowsMimeConverter and QUtiMimeConverter
            for handling drag'n'drop and clipboard data in platform specific
            formats on Windows, macOS, and iOS.
        \li QVulkanInstance now enables Vulkan Portability physical devices
            by default. This is required to be operational with newer
            MoltenVK versions on Apple platforms. Added a NoPortabilityDrivers
            flag that lets you opt out from this.
        \li The Vulkan rendering infrastructure is now using VK_EXT_debug_utils
            instead of the deprecated VK_EXT_debug_report and
            VK_EXT_debug_marker.
        \li QTextLayout::glyphRuns() can now return the string index
            corresponding to each glyph when this is requested. Made available
            through the new function QGlyphRun::stringIndexes().
        \li Checkbox list items can now be read and written in HTML as well as
            Markdown, including conversions.
        \li Added QGuiApplication::setBadgeNumber() to provide feedback to the
            user about the number of unread messages or similar. The badge will
            be overlaid the application's icon in the Dock on \macos, the home
            screen icon on iOS, or the task bar on Windows.
    \endlist

    \section2 Qt Quick Module

    \list
        \li TableView got support for editing cells using an edit delegate.
        \li TableView got support for resizing rows and columns using the mouse.
        \li TableView got support for setting row and column sizes explicitly.
        \li TableView got a new signal \c layoutChanged(). This signal can be
            used to, for example, reposition overlay items.
        \li TableView got support for doing multi-selections.
        \li Added support for specifying separate RGB and alpha blend factors in
            a QSGMaterial.
        \li The Qt Quick scenegraph is now automatically using persistent,
            disk-based caching of graphics pipelines or the intermediate format
            shader bytecode, depending on the platform and the 3D graphics API
            in use. This is expected to reduce the time spent on creating the
            graphics pipeline in subsequent runs of the application. In
            addition, QQuickGraphicsConfiguration provides explicit control over
            if and where this data is written out and loaded from. This enables
            advanced use cases such as shipping a pre-seeded cache file with an
            application or device, which also accelerates first-time startup.
        \li PinchHandler has new \l {PinchHandler::}{scaleAxis} and
            \l {PinchHandler::}{rotationAxis} grouped properties, offering
            several new values, including the \c activeValue property which is
            new in all the handler axis groups. It also got the
            \l {PinchHandler::}{activeTranslation} and
            \l {PinchHandler::}{persistentTranslation} properties that DragHandler
            already had.
        \li DragHandler's \c xAxis and \c yAxis have new
            \l {DragHandler::xAxis.activeValue}{activeValue} properties.
        \li PinchHandler's \l {PinchHandler::}{activeScale} (which was
            previously called \c scale) is no longer restricted to the range between
            \l {PinchHandler::}{minimumScale} and \l {PinchHandler::}{maximumScale}:
            these limits apply only to \l {PinchHandler::}{persistentScale}. Likewise,
            \l {PinchHandler::}{activeRotation} (previously \c rotation) is no longer
            restricted to the range between \l {PinchHandler::}{minimumRotation} and
            \l {PinchHandler::}{maximumRotation}. These limits are applied the same
            way for native touchpad pinch gestures as on touchscreens.
        \li \l {TapHandler::exclusiveSignals} now lets you make the
            \l {TapHandler::}{singleTapped} and \l {TapHandler::}{doubleTapped}
            signals exclusive.

    \endlist

    \section2 Qt Labs Animation Module

    \list
        \li \l BoundaryRule now has a \l {BoundaryRule::}{returnedToBounds} signal.
    \endlist

    \section2 Qt Quick Controls Module

    \list
        \li TreeViewDelegate got support editing tree nodes
        \li The Material style was updated to \l {Material 3}.
            \list
                \li Several controls received visual updates, so it is recommended
                    to check how your application looks and adapt it accordingly:
                    \list
                    \li \l ApplicationWindow
                    \li \l Button
                    \li \l ComboBox
                    \li \l DelayButton
                    \li \l Dialog
                    \li \l Drawer
                    \li \l Menu
                    \li \l Popup
                    \li \l RangeSlider
                    \li \l RoundButton
                    \li \l Slider
                    \li \l SpinBox
                    \li \l Switch
                    \li \l TextArea
                    \li \l TextField
                    \endlist

                \li Some new API was added:
                    \list
                    \li \l {material-containerStyle-attached-prop}{Material.containerStyle}
                        controls the style of the container used by the target control.
                        It can be attached to any window or item, but only \l TextField and
                        \l TextArea support it by default.
                    \li \l {material-roundedScale-attached-prop}{Material.roundedScale}
                        controls the radius of rounded corners used on the target control.
                        It can be attached to any window or item, but only the following
                        controls support it by default:
                        \list
                        \li \l Button
                        \li \l Dialog
                        \li \l DialogButtonBox
                        \li \l Drawer
                        \li \l Menu
                        \li \l Popup
                        \endlist
                    \endlist
            \endlist
        \li The iOS style was finished
            \list
                \li The new controls that were implemented for the iOS style
                    for 6.5 are:
                \list
                    \li \l BusyIndicator
                    \li \l ComboBox
                    \li \l DelayButton
                    \li \l Dialog
                    \li \l DialogButtonBox
                    \li \l HorizontalHeaderView
                    \li \l SelectionRectangle
                    \li \l ToolTip
                    \li \l ToolSeparator
                    \li \l VerticalHeaderView
                \endlist
            \endlist
    \endlist

    \section2 Qt Test Module

    \list
        \li Added QTest::currentTestResolved() which returns true if the test
            has failed or skipped. This can replace QTest::currentTestFailed()
            as the condition to test on return from a helper function.
        \li QTest::mouseRelease() and \l {QTest::}{mouseClick()} can now be
            used to test double-clicks, by specifying a realistic timestamp delay,
            in case you need to check intermediate state between the events.
            \l {QTest::}{mouseDClick()} is still more convenient otherwise.
    \endlist

    \section2 Qt Widgets Module

    \list
        \li QKeySequenceEdit got two new properties:
            \l {QKeySequenceEdit::}{maximumSequenceLength} allows applications
            to control the length of a key sequence.
            \l {QKeySequenceEdit::}{finishingKeyCombinations} defines key
            combinations that end the recording.

        \li Added stereoscopic rendering support to QOpenGLWidget, applicable
            also to any QGraphicsView backed by a QOpenGLWidget viewport. Unlike
            QOpenGLWindow, or the now-removed QGLWidget in Qt 5 and 4,
            QOpenGLWidget needs explicit support for this with supporting APIs
            in place, because applications do not directly render to the native
            window in this case, and therefore do not have the same control
            over the active draw buffers as they have with QOpenGLWindow.
    \endlist

    \section2 Qt Positioning Module

    \list
        \li Introduced \l SatelliteSource - a QML API for
            \l QGeoSatelliteInfoSource.
    \endlist

    \section2 Qt Serial Bus Module

    \list
        \li Introduced \l QCanSignalDescription, \l QCanMessageDescription and
            \l QCanUniqueIdDescription classes. These classes are used to
            provide a set of rules to encode or decode CAN bus messages.
        \li Introduced \l QCanFrameProcessor class. This class can be used to
            decode the received QCanBusFrame into a map of key-value pairs and
            compose a QCanBusFrame out of a map of key-value pairs.
        \li Introduced \l QCanDbcFileParser class. This class is used to parse
            DBC files and generate message descriptions, which can later be
            used in \l QCanFrameProcessor.
    \endlist

    All new classes are experimental and are subject to change.

    \section2 Qt Network Module

    \list
        \li Introduced QHttp1Configuration. The class can be used to configure
            the maximum number of connections used per host when using
            HTTP 1 (default: 6).
        \li QNetworkRequest on Qt for WebAssembly gained the
            UseCredentialsAttribute attribute, enabling withCredentials for the
            underlying XMLHttpRequest.
    \endlist

    \section2 Qt QML Module

    \list
        \li Added API to \l QQmlApplicationEngine and \l QQmlComponent
            to load/create QML elements via their module URI and type-name.
            In contrast to the URL based functions, this also works with C++
            types and inline components.
        \li \l QQmlListProperty properties now behave more like arrays,
            gaining support for methods like map(), reduce() and forEach().
            The same holds for other sequence types, like QList<int> and
            similar.
        \li Extended the \l {QML type compiler}{qmltc} to support more
            qml constructs, notably translation bindings, inline
            components, singletons, and signal handlers for C++-defined
            signals.
        \li The \l {QML script compiler} can handle additional constructs. In
            particular:
            \list
                \li console.log() and friends
                \li \c{let} and \c{const}
                \li qsTr() and friends
                \li arg() for strings
                \li all the remaining bitwise and
                    shift operators
                \li the exponentiation operator
            \endlist
        \li \l {The QML Disk Cache} can be controlled in a more fine-grained way
            using the new environment variable \c {QML_DISK_CACHE}.
        \li Added new public CMake API:
            \list
                \li Introduced a \l [QtCore] {qt_policy} {Qt CMake policy} to
                    set a better default for the resource prefix. If
                    \l{QTP0001} policy is set to \c NEW, the QML engine
                    will always be able to find your QML modules in the
                    resource file system.
            \endlist
        \li The \l{qt_generate_deploy_qml_app_script} CMake function preferably
            accepts an argument called OUTPUT_SCRIPT now. Passing the old
            FILENAME_VARIABLE is deprecated.
    \endlist

    \section2 Qt Quick 3D Module

    \list
        \li Added automatic level of detail (LOD) support for models. This
            allows generating simplified versions of the meshes during asset
            import and then automatically picking the appropriate level when
            rendering.

        \li Added explicit level of detail (LOD) support to control the opacity
            of models based on the camera distance.

        \li Added \l ExtendedSceneEnvironment, with built-in effects for depth
            of field, color grading, glow, vignette, lens flare, and others.
            These effects are performed together, increasing efficiency compared
            to individual, stand-alone post-processing effects, each requiring
            one or more render passes.

        \li Enhanced \l DebugView with rendering statistics, the list of
            active mesh and texture assets, and live render pass information, as
            well as controls to interactively toggle settings, such as wireframe
            mode and material overrides from DebugSettings.

        \li Added \l DebugSettings, available via \l SceneEnvironment, allowing
            programmatic control over settings such as wireframe mode and
            material overrides to only render certain aspects of physically
            based materials.

        \li Added \l InfiniteGrid, implementing an infinite grid in the
            horizontal plane with fade out.

        \li Added built-in, simple fog support, available via
            \l SceneEnvironment. When enabled, this applies a depth or
            height fog effect when rendering the models in the scene.

        \li Improved picking when instanced rendering is used.

        \li Added vertex color support for \l PrincipledMaterial and
            \l SpecularGlossyMaterial

        \li Reflection probe: added support for using a provided cubemap texture
            instead of rendering the scene.

        \li Post-processing effects were enhanced to properly react to changes
            in shader source file URIs at run time.

        \li Added persistent, disk-based caching of runtime-generated material
            shader data. This is expected to improve application startup and
            view change times.
    \endlist

    \section2 Qt WebView Module

    \list
       \li Added \l [QtWebView] {WebViewSettings} to
       configure some of the common \l [QtWebView] {WebView} functionality.
    \endlist

    \section2 Qt Multimedia Module

    \list
        \li The ffmpeg media backend, being a technical preview in 6.4, becomes the default
        for macOS, Windows, Android, and Linux except for Yocto distribution. The native backends
        are still available with limited support.
       \li Introduced \l QScreenCapture class that is a new type of video input.
        It's possible to direct video from \l QScreenCapture through \l {QMediaCaptureSession} to outputs,
        e.g. \l QMediaRecorder or \l QVideoWidget. The screen capture functionality is available only
        with the ffmpeg media backend.
    \endlist

    \section1 Platform Changes

    \section2 WebAssembly
    \list
        \li Added binary package with multithreading enabled to \QOI.
        \li Added support for the \l{https://developer.mozilla.org/en-US/docs/Web/API/File_System_Access_API}
            {File System Access} API. File dialog calls such as QFileDialog::getOpenFileContent() and
            QFileDialog::saveFileContent() will now use this API, if supported by the browser.
        \li Added support for the \l{https://developer.mozilla.org/en-US/docs/Web/API/Local_Font_Access_API}
            {Local Font Access} API. Qt will now use local fonts on browsers which support this API.
        \li Added tech preview of video playback and camera support to Qt Multimedia.
        \li Added configure option for WebAssembly SIMD: -feature-wasm-simd128
        \li Added configure option for WebAssembly exceptions: -feature-wasm-exceptions
        \li Published \l{https://git.qt.io/mosorvig/qt-web-utils}{Qt Web Utils} with utility functions and
            Qt on web usage examples.
        \li QTest for WebAssembly now uses emrun by default. A specialized script for WebAssembly drives
            the execution of automatic tests.
    \endlist

    \section2 Desktop Platforms

    \section3 Windows

    \list
        \li The environment variable QT_WIN_DEBUG_CONSOLE can be set to see
            stdout/stderr messageges in a console window for GUI applications
            that are started from the command line.
            Set it to \c new or \c attach.
    \endlist

    \section3 \macos

    \list
        \li Added native backend for QMessageBox and QErrorMessage.
    \endlist

    \section3 Wayland Client on Linux

    \list
        \li Now supports fractional_scale_v1 protocol for compositors that suggest fractional scale factors for the client.
    \endlist

    \section2 Mobile Platforms

    \section3 Android

    \list
        \li Updated Gradle to 8.0 and the Android Gradle Plugin (AGP) to 7.4.1
            (requires JDK 11 or above).
        \li Updated NDK to r25b (25.1.8937393).
        \li The list of supported versions is now Android 8.0 (API 26) or later.
        \li Bump the minimum platform build sdk version to 33 (QT_ANDROID_API_VERSION).
        \li Support more operations on content scheme URIs with Qt file/dir facilities.
        \li Fixes and documentation updates for QStandardPaths under Android Scoped Storage.
        \li Print Qt JNI exceptions from Qt and not the Android System.
        \li Fixed support for APK Signature Scheme v2.
    \endlist

    \section3 iOS

    \list
        \li Added native implemementation for QColorDialog and QFontDialog.
    \endlist

    \section2 Embedded Platforms

    \section3 Boot to Qt

    \list
        \li Boot to Qt stack was updated to use yocto 4.1.2 (langdale).
        \li Support for macOS host using Docker-based toolchains.
        \li The \l{Support Levels for Target Hardware} were updated and there
            are now multiple levels of support that apply across
            specific hardware and OS combinations.
    \endlist

    \section1 List of API Changes

    These pages contain an overview of API changes in Qt 6.5:
    \list
        \li \l {New Classes and Functions in Qt 6.5}
        \li \l {Obsolete Classes}
    \endlist
*/

/*!
    \page newclasses65.html
    \title New Classes and Functions in Qt 6.5
    \brief A list of new APIs in Qt 6.5.
    \ingroup whatsnewqt6

    This page contains a comprehensive list of all new classes and functions
    introduced in Qt 6.5.

    \sincelist 6.5
*/