309 lines
13 KiB
Plaintext
309 lines
13 KiB
Plaintext
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Qt 5.13 introduces many new features and improvements as well as bugfixes
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over the 5.12.x series. For more details, refer to the online documentation
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included in this distribution. The documentation is also available online:
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https://doc.qt.io/qt-5/index.html
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The Qt version 5.13 series is binary compatible with the 5.12.x series.
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Applications compiled for 5.12 will continue to run with 5.13.
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Some of the changes listed in this file include issue tracking numbers
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corresponding to tasks in the Qt Bug Tracker:
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https://bugreports.qt.io/
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Each of these identifiers can be entered in the bug tracker to obtain more
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information about a particular change.
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****************************************************************************
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* Important Source Incompatible Changes *
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****************************************************************************
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- Moc generated files include the standard <memory> header file now.
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A side effect of this is that code including the Moc output from within
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a namespace will fail to compile.
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****************************************************************************
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* Important Behavior Changes *
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****************************************************************************
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- The Qt resource system now supports compressing content using the
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Zstandard (https://zstd.net) algorithm. Compared to zlib, it compresses
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better for the same CPU time, so this algorithm is the default.
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QResource::isCompressed() returns true for either compression algorithm.
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Use QResource::compressionAlgorithm() to find out which algorithm to
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decompress. QFile will automatically decompress using the correct
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algorithm.
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- QDataStream version bumped up to 19 to account for changes in the
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serialization of QFont.
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- [QTBUG-73048] Qt now enables by default warnings when using APIs
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marked as deprecated. It is possible to disable such warnings by
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defining the QT_NO_DEPRECATED_WARNINGS macro. The old
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QT_DEPRECATED_WARNINGS macro which was used to enable this warning
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now has no effect (warnings are automatically enabled).
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****************************************************************************
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* Third-Party Code *
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****************************************************************************
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- Updated bundled SQLite to version 3.28.0.
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- [QTBUG-72623] Updated DNS public suffix list
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- [QTBUG-73883] libjpeg-turbo was updated to version 2.0.2
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- Bundled libpng was updated to version 1.6.37
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****************************************************************************
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* Platform-Specific Changes *
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****************************************************************************
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- X11 / XCB:
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* [QTBUG-45375] QTabletEvent coordinates now come from AbsX/AbsY
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valuators in the X11 event, in more precise 32.32 fixed-point format,
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scaled to fit the virtual desktop. It's possible to revert to using
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the legacy 16.16-format event_x/event_y coordinates as in previous
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releases by setting the QT_XCB_TABLET_LEGACY_COORDINATES environment
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variable.
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* [plugins] platforminputcontexts now use libxkbcommon-compose APIs for
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compose key input, instead of Qt's own implementation.
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- Android
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* Increased the minimum supported Android version to Android 5.0
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(API level 21).
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- Windows
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* [QTBUG-47247][QTBUG-71855] Add a default setting for
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hasBorderInFullScreen in QtPlatformHeaders, QWindowsWindowFunctions
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* [QTBUG-57180] Removed confusing DirectWrite warning when loading
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bitmap fonts.
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- macOS
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* Accessibility: VoiceOver now reads all lines in multiline text
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components when navigating by lines.
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****************************************************************************
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* Tools *
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****************************************************************************
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- configure & build system:
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* Added --linker=[bfg,lld,gold] configure flag.
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* The default OpenGL configuration changed from ANGLE to dynamic OpenGL.
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* Added -schannel option to enable Schannel support on Desktop Windows.
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* Added -coverage option for recording coverage data during execution
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- CMake
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* Added support for automatic linking of transitive dependencies in
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static builds
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- qmake
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* [QTBUG-53654] Introduced the variables WINDOWS_TARGET_PLATFORM_VERSION
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and WINDOWS_TARGET_PLATFORM_MIN_VERSION for overriding the default
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values of WindowsTargetPlatformVersion and
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WindowsTargetPlatformMinVersion in Visual Studio project files.
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- RCC now supports compressing content using the Zstandard
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(https://zstd.net) algorithm. Compared to zlib, it compresses better for
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the same CPU time, so this algorithm is the default. To go back to the
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previous algorithm, pass command-line option --compress-algo=zlib.
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Compression levels range from 1 (fastest, least compression) to 19
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(slowest, best compression). Level 0 tells the library to choose an
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implementation-defined default. The default compression level is
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"heuristic" (level -1): under this mode, RCC will attempt a very fast
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compression (level 1) and check if the file was sufficiently compressed.
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If it was, then RCC will compress again using an implementation-defined
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level.
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****************************************************************************
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* QtCore *
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****************************************************************************
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- New class QConcatenateTablesProxyModel, to concatenate the rows from
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multiple source models.
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- New class QTransposeProxyModel to swap rows and columns of the source
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model.
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- Added macros Q_DISABLE_MOVE and Q_DISABLE_COPY_MOVE complementing
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Q_DISABLE_COPY.
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- Qt Containers and meta type system now use C++11 type traits
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(std::is_trivial, std::is_trivially_copyable and
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std::is_trivially_destructible) to detect the class of a type not
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explicitly set by Q_DECLARE_TYPEINFO. (Q_DECLARE_TYPEINFO is still
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needed for QList.)
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- QCommandLineParser:
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* [QTBUG-58490] The application name (if set in QCoreApplication) is now
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shown in error messages.
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- QDateTime:
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* [QTBUG-71030] Fixed race conditions in getting the local time zone. Qt now
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has a mutex lock around all calls to tzset() and mktime(). Application
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code should avoid calling those functions directly.
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- QFile:
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* Made QFile::copy() issue a filesystem-synchronization system call,
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which would make it less likely to result in incomplete or corrupt
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files if the system reboots or uncleanly shuts down soon after the
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function returns. New code is advised to use QSaveFile instead, which
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also allows display of a progress report while copying.
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- QFileInfo:
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* [QTBUG-63970][QTBUG-30401][QTBUG-20791] Fixed resolving of symbolic
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links to UNC shares on NTFS file systems.
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- QJsonArray:
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* [QTBUG-32793] Added cbegin() and cend() methods for compatibility with
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the Standard Library container concepts.
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- QJsonDocument:
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* [QTBUG-71445] Added the ability to stream QJsonDocument into and from
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QDataStream if it is contained in a QVariant.
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- QLocale:
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* Added support for Western Balochi, Ido, Lojban, Sicilian and
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Southern Kurdish.
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* [QTBUG-71445] Added a const overload for formattedDataSize().
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* [QTBUG-782] Added toLong() and toULong().
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- QMetaObject:
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* Non-copyable lambdas can now be used with invokeMethod(). For
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consistency reasons, the functor object is now always moved.
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- QMimeDatabase:
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* Added configure option -no-mimetype-database that tells Qt not to
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bundle its own copy of the XDG MIME database. If this option is
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passed, QMimeDatabase will only work if there's a system copy in
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$XDG_DATA_DIRS/mime. This option is useful for Linux distributions
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that ensure the data is always present.
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- QSettings:
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* Added QSettings(Scope...) constructor to avoid using #ifdef in Qt
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applications.
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- QStringListModel:
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* [QTBUG-69807] Implemented moveRows
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- QUrlQuery:
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* QUrlQuery now provides an initializer list constructor. It can be
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created using a list of key/value pairs.
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- QVector:
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* QVector no longer requires a default constructor for its template
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argument.
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****************************************************************************
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* QtDBus *
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****************************************************************************
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- Matching namespace prefixes using QDBusServiceWatcher (instead of full
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service names) is now possible. For example, "com.example.backend1*"
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will match "com.example.backend1", "com.example.backend1.foo" and
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"com.example.backend1.foo.bar", but not "com.example.backend12".
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****************************************************************************
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* QtGui *
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****************************************************************************
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- CSS:
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* Added support for HSL/HSLA colors.
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* Fix the range of the hue parameter when parsing a color given in HSL
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or HSV.
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- QFont:
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* Add setFamilies()/families() to support use of font families with
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commas and quotes in their name.
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- QImage:
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* [QTBUG-41176] Added support for 16-bit grayscale format.
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* A new method convertTo has been added to change the format of a QImage
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in place.
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- QPainterPath:
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* Added clear(), reserve(), capacity(). clear() removes allocated
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QPainterPath elements but preserves allocated memory, which can be
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useful for application with complex paths that are often recreated.
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reserve() and capacity() follow QVector semantics.
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- QWindow:
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* [QTBUG-67903][QTBUG-52944] QWindow::transientParent is now a property.
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- Text:
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* [QTBUG-60813] Deprecated QFont::lastResortFamily() and
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QFont::lastResortFont() which are not in use in Qt 5 and did not
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provide any useful information.
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* [QTBUG-22813] Added support for setting the font's style name in
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QTextCharFormat.
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****************************************************************************
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* QtNetwork *
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****************************************************************************
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- TLS (SSL):
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* Support for SSLv2 and SSLv3 sockets has been dropped, as per RFC 6176
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(2011) and RFC 7568 (2015).
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* The Schannel backend now supports ALPN and thus HTTP/2.
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* [QTBUG-62637] Added support for Schannel on Desktop Windows. To build
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Qt with Schannel support use '-schannel' during configure.
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* Added class QOcspResponse as a part of OCSP stapling support.
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* [QTBUG-12812][QTBUG-17158] Added OCSP-stapling support for OpenSSL
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backend
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* [QTBUG-71828][QTBUG-73289] Fixed SSL verification when connecting to IP
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address (no host name) if that IP address is listed in the certificate.
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****************************************************************************
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* QtTestLib *
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****************************************************************************
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- Added QTest::toString(const QModelIndex &idx)
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- Removed support for GPU_BLACKLIST files. Reimplementations or
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equivalents of QTEST_MAIN() should remove their uses of
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QTEST_ADD_GPU_BLACKLIST_SUPPORT and its _DEFS; they are still vacuously
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defined, but serve no remaining purpose and shall be undefined in due
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course.
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****************************************************************************
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* QtWidgets *
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****************************************************************************
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- QAbstractScrollArea:
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* [QTBUG-69120] QTableView/QTreeView, when reporting their
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viewportSizeHint(), now correctly take into account their scroll
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bars' visibility and visibilityPolicy.
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- QHeaderView:
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* dataChanged now respects the given roles to avoid useless
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recomputations.
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- QLabel:
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* Minor performance improvement when painting a label with an image.
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- QListWidget:
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* [QTBUG-69807] Implemented moveRows in model
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* [QTBUG-68977] Sped up handling of hidden items when working with large
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data sets.
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- QPlainTextEdit:
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* Added QRegularExpression find() method overload.
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- QTextEdit:
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* Added QRegularExpression find() method overload.
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- QTreeView:
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* Added expandRecursively() to expand all items below a given index.
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- QWidgetTextControlPrivate:
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* [QTBUG-69735] Moved cursor selection to start.
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****************************************************************************
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* QtSql *
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****************************************************************************
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- SQLite:
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* [QTBUG-63498] The json1-extension for the SQLite3 plugin is now enabled
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by default.
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- PostgreSQL:
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* QSqlDatabase is now stricter about table names when used with record()
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and primaryIndex(). If the tablename was not quoted when it was
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created, then the table name passed to record() and primaryIndex()
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needs to be in lower case so that PostgreSQL is able to find it.
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