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587 lines
25 KiB
Plaintext
587 lines
25 KiB
Plaintext
Qt 5.9 introduces many new features and improvements as well as bugfixes
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over the 5.8.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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http://doc.qt.io/qt-5/index.html
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The Qt version 5.9 series is binary compatible with the 5.8.x series.
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Applications compiled for 5.8 will continue to run with 5.9.
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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 Behavior Changes *
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****************************************************************************
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- [QTBUG-48658][QTBUG-56306] The linuxfb and bsdfb platform plugins now
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follow the behavior of eglfs by making the first window fullscreen. This
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provides consistency and avoids applications having to make their
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windows match the screen size manually. The new behavior can be disabled
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by setting the environment variable QT_QPA_FB_FORCE_FULLSCREEN=0.
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- [QTBUG-59391] A QVariant containing a std::nullptr_t is now streamable
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to/from QDataStream.
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- Whitespace inside identifiers in logging rule files is not ignored
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anymore. That is, "[my category]" and "[mycategory]" are now two different
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categories.
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- [QTBUG-59849] QSysInfo::productType() and QFileSelector behavior on
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macOS was restored to match what Qt used to return in version 5.7.0 and
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earlier. The behavior found in Qt 5.6.2, 5.7.1 and 5.8.0 is removed.
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- [QTBUG-60771] Reverted a change that caused Qt 5.6 through 5.8 not to
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connect to QSystemSemaphore and QSharedMemory created by running
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applications using Qt earlier than 5.6. Unfortunately, this means that Qt
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5.9 will not connect to 5.6-5.8.
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- QTouchEvent
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* Touch point ids are now unique even between different devices. As a
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consequence of that, you cannot anymore assume that
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QTouchEvent::TouchPoint::id has the same value as given by the native
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platform nor the same value as given by synthesized touch points.
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****************************************************************************
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* General Notes *
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****************************************************************************
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Deprecation Notice
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------------------
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- QSysInfo::windowsVersion() and QSysInfo::macVersion() are deprecated and
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are replaced by the newly introduced class QOperatingSystemVersion.
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- [QTBUG-57288] Removed support for WinRT/Windows Phone 8.1.
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- Support for CMake < 3.1 is deprecated and will be removed in Qt 5.10.
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Future Compatibility Notice
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---------------------------
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- [QTBUG-59849] The identifiers that QSysInfo::productType() and
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QFileSelector will use to identify macOS systems will change in Qt 6.0
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to match the Apple naming guidelines which will be current then.
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Potentially Source-Incompatible Changes
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---------------------------------------
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- The internal Q_COMPILER_UNICODE_STRINGS macro is now defined if the
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compiler supports charNN_t, even if the standard library does not. To
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check for availability of std::uNNstring, use the new
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Q_STDLIB_UNICODE_STRINGS macro.
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Third-Party Code
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----------------
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- Sqlite was updated to version 3.16.1.
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- libpng was updated to version 1.6.28.
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- Bundled HarfBuzz-NG copy updated to 1.4.1
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- Gradle wrapper 3.4.1 was added as a third-party component (see
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src/3rdparty/gradle). The code is licensed under Apache License 2.0, and is
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used to create Android packages.
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- PCRE 8.39 (src/3rdparty/pcre) was removed as a third-party component.
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- PCRE 2 10.22 was added in src/3rdparty/pcre2 as a third-party
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component. The code is licensed under the BSD 3-clause "New" or "Revised"
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License, and is required by QRegularExpression (at least version 10.20).
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****************************************************************************
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* Library *
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****************************************************************************
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QtCore
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------
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- QProcessEnvironment is now available on iOS, tvOS, watchOS, and VxWorks.
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- [QTBUG-57715] QCoreApplication::applicationVersion now defaults to an
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appropriate platform-specific value. On Windows, it defaults to the
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PRODUCTVERSION parameter of the VERSIONINFO resource for classic desktop
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apps, and the version attribute of the application package manifest for
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Univeral Windows Platform apps. On Apple Platforms (macOS, iOS, tvOS,
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watchOS), it defaults to the CFBundleVersion property of the information
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property list (Info.plist) file. On Android, it defaults to the
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android:versionName attribute of the AndroidManifest.xml manifest
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element. On other platforms, the default remains an empty string.
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- Added QStaticByteArrayMatcher.
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- Added new qfloat16 class.
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- QStringLiteral is now guaranteed to be evaluated at compile-time. The
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last platform (QNX) to use the QString::fromUtf8() fallback has been
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ported to allocate the string data statically, too.
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- Event loop:
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* [QTBUG-33489][QTBUG-48717] QCoreApplication::flush() is now
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deprecated. Use QCoreApplication::processEvents() and
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QCoreApplication::sendPostedEvents() instead.
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- QByteArray:
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* Added toHex() overload to insert a separator character between the hex
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bytes.
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- QChar:
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* Disambiguated comparisons with nullptr constants such as '\0', which
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5.8.0 broke. As a consequence, QChar<->int comparisons are no longer
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deprecated, as this was a failed attempt at fixing the ambiguity.
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- QCryptographicHash:
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* [QTBUG-59770] QCryptographicHash now properly calculates SHA3 message
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digests. Before, when asked to calculate a SHA3 digest, it calculated
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a Keccak digest instead.
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- QDataStream:
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* Added operator<< and operator>> overloads that take std::nullptr_t, to
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facilitate generic code.
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* Added operator<< and operator>> for streaming QFlags into and out of
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QDataStreams.
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- QDateTime:
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* [QTBUG-52284][QTBUG-56397][QTBUG-56460][QTBUG-56345] Fixed a number of
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bugs related to handling of timezone offsets close to or during daylight
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savings changeovers, as well as timezones changing their standard
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offset.
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* [QTBUG-57298][QTBUG-57320] Fixed the handling of time zones in the
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toString() overload taking Qt::TextDate.
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- QDir:
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* Fixed a bug that caused QDir::mkpath() to create the wrong directory
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if the requested path contained a symbolic link and "../".
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* Added isEmpty(), that can help determining if a directory listing would
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be empty.
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- QFileInfo:
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* [QTBUG-48306] Made sure that all file lifecycle times are in local
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time. This was probably true before, but is now explicit.
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- QFileSelector:
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* [QTBUG-51230] Removed the requirement for an unused default base file
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in case you want to load only a variant.
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- QFlags:
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* Added operator<< and operator>> for streaming QFlags into and out of
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QDataStreams.
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- QHash / QMultiHash:
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* [QTBUG-60395] Fixed a bug that caused operator== to fail in the presence
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of duplicated keys.
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- QLocale:
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* Additional flags in QLocale::NumberOption allow generating strings
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from doubles in accordance to EcmaScript's Number.toPrecision(n).
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* Qt functions now always use the system time zone on Apple platforms,
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the same that low-level C APIs like localtime() does. Previously,
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converting dates and times to strings would use the "default" time
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zone (which is almost always the same as the "system" time zone but
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could be changed with the Apple API).
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- QLockFile:
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* [QTBUG-49640] Fixed a bug that caused QLockFile not to recognize a
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stale lock file if the machine's hostname contained non-US-ASCII
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characters, on Unix. A Windows fix is still pending.
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* Fixed a deadlock occurring if a corrupted lock file's modification
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time is in the future.
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- QMetaObject:
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* [QTBUG-60185] Fixed crash in QMetaObject::invokeMethod() and
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QMetaMethod::invoke() with QueuedConnection and types whose metatype gets
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automatically registered.
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- QObject:
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* QObject::dumpObjectInfo and QObject::dumpObjectTree are now fully
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functional even in a non-debug build of Qt.
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* QObject::dumpObjectInfo and QObject::dumpObjectTree now have const
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overloads.
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* Added a startTimer() overload taking std::chrono values.
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* [QTBUG-58054] Fixed an incompatibility with using noexcept functions as
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connect() targets in C++17 mode.
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- QSettings:
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* [QTBUG-34919] Added proper support for system-wide configuration file
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lookup based on XDG spec (XDG_CONFIG_DIRS) on Unix based systems.
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* [QTBUG-58531] Fixed data corruption when reading byte arrays on macOS.
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- QSharedPointer:
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* [QTBUG-49824] Fixed undefined behavior when creating an object with
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QSharedPointer::create() and its constructor throws an exception.
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- QStorageInfo:
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* Added QStorageInfo::subvolume(), which returns the name of the
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subvolume of a volume that was mounted, if one was detected. This is
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currently implemented only for btrfs on Linux.
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- QString:
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* toLocal8Bit() now preserves nullness of the input QString (outputs
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null QByteArray).
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* QString::null is now deprecated. When used to construct a QString, use
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QString() instead. When used to compare to a QString, replace with
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QString::isNull().
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- QStringRef:
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* toLocal8Bit() and toLatin1() now preserve nullness of the input
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QStringRef (output null QByteArrays).
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- QThreadPool:
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* The cancel() function suffers from several subtle issues and has been
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replaced with a new tryTake() function.
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- QUrl:
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* The temporary compatibility in QUrl::resolved() that treated the base
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URL as relative if its scheme matched the current URL's scheme has
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been removed.
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* [QTBUG-60364] Fixed a bug that caused certain domain names that look
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like Internationalized Domain Names to become corrupt in decoded forms
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of QUrl, notably toString() and toDisplayString().
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- QVarLengthArray:
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* Fixed a bug involving appending an item already in the container to
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the container again.
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* Added rvalue overloads of append() and push_back().
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- QVariant:
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* [QTBUG-56073] Fixed a bug that caused wrong results for comparisons of
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QVariants containing either NaN or infinite numbers.
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* Can now convert QUuid to and from QByteArray, not just QString.
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* [QTBUG-58296] isNull() now returns true if the QVariant contains nullptr.
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QtGui
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-----
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- OpenGL:
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* [QTBUG-55496] QOpenGLShaderProgram now offers a built-in program binary
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disk cache for systems with OpenGL ES 3.x or GL_ARB_get_program_binary.
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This can lead to significant increases in performance when it comes to
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application startup times for example. Usage is opt-in for direct C++
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users of the class, however Qt's own main users of shaders, including Qt
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Quick and QPainter's OpenGL engine, are migrated to use the new,
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cache-enabled APIs. Opting out on application level is always possible
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via Qt::AA_DisableShaderDiskCache.
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- QIcon:
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* [QTBUG-49820] Implemented support for Scale directory key according to
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Icon Theme Spec. Icons created via QIcon::fromTheme() now have high
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DPI support by specifying the Scale in the appropriate entry of the
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relevant index.theme file.
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- QImage:
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* A new method reinterpretAsFormat() is has been added to change the
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format of a QImage without converting the data.
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- QMatrix4x4:
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* operator*=() now calculates the correct result even if the RHS and LHS
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are the same object.
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- QPA:
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* QPlatformScreen: Added an API to list available modes for a screen,
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that is resolution and refresh rate.
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* [QTBUG-58383] The function createForeignWindow() has been added to
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QPlatormIntegration and is now responsible for creating foreign
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windows. The function isForeignWindow() in QPlatformWindow has been
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added, and platforms should implement this to return true for windows
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created by createForeignWindow().
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- QPainter:
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* [QTBUG-28851] Fixed fills of negatively sized QRects.
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- QRgba64:
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* The default constructor on Clang and GCC builds now no longer
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initializes with 0s, but leaves the value uninitialized. This is
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consistent with MSVC behavior and pre-C++11 behavior of GCC and Clang.
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- QScreen:
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* Added manufacturer, model and serialNumber properties.
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- QTextLine:
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* Fixed a possible undefined behavior in the calculation of glyph right
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bearing when a QTextLine layout is performed.
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- QTouchEvent:
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* TouchPoint::rect(), sceneRect() and screenRect() are deprecated; a
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touchpoint is now modeled as an ellipse centered on a point, so please
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use pos(), scenePos(), screenPos(), and ellipseDiameters() instead.
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* QTouchEvent::TouchPoint::id values are now unique even between
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different devices.
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- QWindow:
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* [QTBUG-58383] The "_q_foreignWinId" dynamic property is no longer set
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nor read.
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- Text:
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* [QTBUG-56538] Added QTextDocument::toRawText() function.
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* [QTBUG-48005] Fixed clipping errors and too small bounding rects for
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some right-to-left text.
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* [QTBUG-57241] Fixed crash for very tall glyphs
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QtNetwork
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---------
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- The connect timeout from QAbstractSocket is now configurable through
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QNetworkConfiguration.
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- Added redirects policy to QNAM.
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- Added HTTP Strict Transport Security to QNAM.
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- Bearer management:
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* [QTBUG-56228][QTBUG-52988] Fixed a bug that could cause a crash on
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application exit, depending on the order of destruction of the
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QCoreApplication object and the QtDBus manager thread.
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- QHostAddress:
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* QHostAddress is now implicitly shared.
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* Added operator!=(SpecialAddress, QHostAddress).
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- QSslSocket:
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* Fixed connection to international domains (IDN) by normalizing to
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ASCII equivalent before comparing the host name in the certificate.
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* [QTBUG-56102] Allow QSslSocket (Secure Transport back-end) to use a temporary
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keychain on macOS instead of a default one; this can be enabled via a special
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environment variable QT_SSL_USE_TEMPORARY_KEYCHAIN (this feature is disabled
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by default).
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* [QTBUG-60233] QSslSocket (Secure Transport back-end) now respects CA
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certificates set in QSslConfiguration (before was always implicitly using
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the built-in anchor certificates in addition to a user provided configuration).
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* [QTBUG-59480] Added a missing cipher (Secure Transport).
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* [QTBUG-59930] Fixed spurious socket notifications in QCFSocketNotifer.
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* [QTBUG-58214] Fixed spurious socket notifications on Windows.
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QtTest
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------
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- QUuids are now printed on failure.
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- Added QTest::addRow(), which is like newRow(), but can take printf-style
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formatted strings.
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QtWidgets
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---------
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- [QTBUG-26116] QWidget now has a tabletTracking property, analogous to
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mouseTracking, which will enable TabletMove events while the stylus is
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hovering, even if no button is pressed. This allows applications to show
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feedback based on the other tablet event properties such as rotation and
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tilt.
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- Input:
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* [QTBUG-42074][QTBUG-57003] Characters in the Unicode Private Use Area, as
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well as zero-width joiners and zero-width non-joiners, are now accepted
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as input in QLineEdit and QTextEdit.
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- Qt::WA_WindowPropagation:
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* [QTBUG-59106] Locale is now propagated consistently, along with font and
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palette, within the widget hierarchy. Previously, setLocale() propagated
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the new locale from parents to children (recursively) but new children
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didn't inherit from their parents.
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- QColorDialog:
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* [QTBUG-58424] Fixed long standing bug that prevented custom colors in
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QColorDialog to be stored in the settings.
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- QDialog:
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* [QTBUG-6018][QTBUG-12156][QTBUG-14430] Fixed a bug where accessing the
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result of QDialog's result could yield an incorrect value in some
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situation like using it as a delegate for item views.
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- QErrorMessage:
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* Critical (QtCriticalMsg) and informational (QtInfoMsg) messages are now
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displayed properly. Previously, they appeared as if they were debug
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(QtDebugMsg) ones.
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- QFormLayout:
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* [QTBUG-58693][QTBUG-15990] The functions takeRow() and removeRow(),
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new in 5.8.0, now take and remove the correct row.
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- QMacStyle:
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* [QTBUG-57470] PE_IndicatorMenuCheckMark now looks for State_On instead of
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the State_Selected to set its highlighted state. Its color is picked from
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the style option palette.
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- QPixmapStyle:
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* Now handles progress bars with minimum != 0 correctly.
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- QSizePolicy:
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* Added transposed() method.
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- QSystemTrayIcon:
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* [QTBUG-49283] Support for custom icons in showMessage() was added.
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- QTextEdit:
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* [QTBUG-59196] Fixed initial char format of input method text as it is
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in pre-edit mode.
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****************************************************************************
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* Platform-specific Changes *
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****************************************************************************
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Android
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-------
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- [QTBUG-44697] Removed old work-around which was causing OpenGL shader
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compilation to fail on updated Android emulators.
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- QTouchEvent::TouchPoints have correct ellipseDiameters() and rotation().
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XCB/X11
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-------
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- [QTBUG-60389] Every QTouchEvent includes up-to-date keyboard modifiers.
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- [QTBUG-59415] Every QTabletEvent includes up-to-date keyboard modifiers.
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Linux
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-----
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- Added an option to switch from mailbox to FIFO mode in eglfs' EGLStream
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backend. This is done by setting the environment variable
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QT_QPA_EGLFS_STREAM_FIFO_LENGTH to a >= 1 value, the desired length of the
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FIFO queue.
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- [QTBUG-57411] Added support for cross-compilation for the MIPS CI20.
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- Added support for cross-compilation targeting 64-bit Jetson TX1 systems.
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- Added support for cross-compilation targeting Renesas R-Car H2 (Lager)
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systems.
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- The Raspberry Pi 3 device specs have been renamed from linux-rpi3-* to
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linux-rasp-pi3-* in order to follow the pattern of the RPi 1 and 2 specs.
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- [QTBUG-57980] Added support for specifying the primary screen in the
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JSON config file in QT_QPA_EGLFS_KMS_CONFIG when running on DRM/KMS with
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eglfs.
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- The evdevtouch plugin now has the option to apply filtering and
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prediction. Enabled by passing "filtered" as an argument. Prediction can
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be specified by passing "prediction=X" as an argument, where X is in
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milliseconds.
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- linuxfb:
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* [QTBUG-56306] Added experimental support for DRM dumb buffers. Enable
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by setting the environment variable QT_QPA_FB_DRM to 1.
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macOS
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-----
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- Extra mouse buttons are now correctly be mapped to correct Qt::MouseButton
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values.
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- Accessibility:
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* [QTBUG-39008][QTBUG-54776][QTBUG-56043][QTBUG-57146] A common crash in
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accessibility on macOS was fixed.
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Solaris
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-------
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- [QTBUG-56293] Support for the Illumos distribution OpenIndiana (release
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"Hipster") has been added. This is a community-supported partial port.
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Windows
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-------
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- Support for Visual Studio 2017 has been added.
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- Fixed frameMargins for WM_NCCALCSIZE when handled inside with
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QAbstractNativeEventFilter.
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- [QTBUG-55510][QTBUG-48242] Windows are now automatically resized when they
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are moved on a screen to adapt to the new pixel ratio.
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- [QTBUG-58446] Fixed a bug that caused applications to crash with
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"Illegal instruction" faults when compiled with Visual Studio and run on
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some older processors.
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- [QTBUG-57023] Fixed a bug that caused QFile to create files with
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truncated names if the file name was invalid. Now, QFile::open correctly
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fails to create such files.
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|
|
|
- PDF:
|
|
* [QTBUG-58954] Fixed a bug in PDF output when using high-dpi scaling
|
|
which was causing the display of warnings when opening the file in
|
|
Adobe Reader.
|
|
|
|
****************************************************************************
|
|
* Tools *
|
|
****************************************************************************
|
|
|
|
moc
|
|
---
|
|
|
|
- [QTBUG-59351] Fixed parsing errors in presence of C++14 digit separators.
|
|
- Added Support for C++17 nested namespaces
|
|
- Move-only types are now supported as return types of signals and slots.
|
|
|
|
configure & build system
|
|
------------------------
|
|
|
|
- [QTBUG-30083] Generalized command line overrides of installation
|
|
paths of external dependencies; see configure -help. Use configure
|
|
-list-libraries to find about known libraries.
|
|
- [QTBUG-42937][iOS] Added support for the configure -shared flag.
|
|
- [QTBUG-56225] Re-introduced creation of config.summary.
|
|
- [QTBUG-57908][QTBUG-59062] Fixed parsing of configure --xxx options.
|
|
- [QTBUG-57656][macOS] Fixed installation of header-only modules like
|
|
QtUiPlugin in framework builds of Qt.
|
|
- [QTBUG-58321] Switching to a different qmakespec for user projects will
|
|
now properly enable C++11 support if necessary.
|
|
- [QTBUG-58411] Added configure -list-features option. This is useful
|
|
for finding unnecessary features to disable with -no-feature-XXX.
|
|
- [QTBUG-58511] Fixed QMAKE_CXXFLAGS, etc. assignments on the configure
|
|
command line being ignored when building bootstrapped Qt tools while
|
|
not cross-building (in cross-builds, they are intentionally ignored).
|
|
- [QTBUG-60016] configure will now refuse to run if it finds variables
|
|
in its environment which are known to cause trouble.
|
|
- [QTBUG-60382] Fixed query of library paths from pkg-config.
|
|
- Added possibility to merge ANGLE's libEGL and libGLESv2 into QtANGLE;
|
|
configure option -combined-angle-lib.
|
|
- [Windows] The -no-rtti configure option was removed, as Qt fails
|
|
to build under that condition. To disable RTTI in user code, add
|
|
CONFIG+=rtti_off to your project file.
|
|
- [GCC] Debug builds of Qt are now optimized with -Og if available;
|
|
use -no-optimize-debug to disable. This is also applicable to user
|
|
projects; add CONFIG+=optimize_debug to your project file.
|
|
- Added possibility to optimize release builds for size instea of speed;
|
|
configure option -optimize-size.
|
|
|
|
qmake
|
|
-----
|
|
|
|
- [QTBUG-51598] Libs.private is now written to .pc files only when building
|
|
static libraries.
|
|
- [QTBUG-55279] Static plugins are now imported also into dynamic libraries,
|
|
not only executables. Various other improvements to static linking.
|
|
- [QTBUG-56965][Darwin] Fixed overriding QMAKE_*_DEPLOYMENT_TARGET from
|
|
within project files.
|
|
- [QTBUG-57343] Fixed execution of extra compilers' depend_commands in build
|
|
directories containing shell meta characters in their names,.
|
|
- [QTBUG-57276] Fixed QMAKE_PRE_LINK (always) and QMAKE_POST_LINK (in one
|
|
case) being ignored when building static libraries for Unix.
|
|
- [QTBUG-57435][VS] Fixed capitalization of <PlatformToolset> tags in the
|
|
generated vcxproj files.
|
|
- [QTBUG-57694][VS] Fixed bogus ToolsVersion attributes in the generated
|
|
vcxproj files.
|
|
- [QTBUG-57914][VS] Fixed handling of RC_FILE when generating single-
|
|
configuration vcxproj files.
|
|
- [QTBUG-59630][VS] Fixed uninitialized value of GenerateDebugInformation,
|
|
which was particularly bad if DebugFastLink was emitted for VS < 2015.
|
|
- [QTBUG-58710][MSVC/nmake] Fixed overlong lines in response files generated
|
|
for link.exe and lib.exe.
|
|
- [QTBUG-57502][Darwin] Added support for launch images in asset catalogs.
|
|
- [QTBUG-58126] Fixed the target compiler's default include and library paths
|
|
interfering with the build of host tools when cross-building.
|
|
- [QTBUG-58764] Fixed building of moc'able files with a Qt installation
|
|
in a path containing spaces.
|
|
- [QTBUG-58857] Added the ability to use CONFIG+=no_moc_predefs to suppress
|
|
the collection of the compiler's predefined macros for moc's use.
|
|
- [QTBUG-59004][Windows] '(n)make install' will now copy the timestamps of
|
|
the installed files, like it was already done on Unix.
|
|
- [QTBUG-59319] Fixed $$shadowed() function for the case where the source
|
|
tree lives in a symlinked or substituted path.
|
|
- [QTBUG-59779][Android][MinGW] Fixed CONFIG+=separate_debug_info.
|
|
- [QTBUG-38782][iOS] Added support for setting the Xcode development team
|
|
and provisioning profile.
|
|
- [QTBUG-58754][iOS] Fixed handling of bitcode.
|
|
- [Darwin] Binaries now automatically get @executable_path/Frameworks
|
|
added to RPATH, and libraries additionally @loader_path/Frameworks.
|
|
Suppress with CONFIG+=no_default_rpath.
|
|
- [Darwin][Xcode] QMAKE_BUNDLE_DATA now supports embedding Frameworks
|
|
and PlugIns.
|
|
- [macOS] Support for universal binaries has been re-introduced.
|
|
- Added the command line options -early and -late, plus -before (which is
|
|
the default) for symmetry with -after.
|
|
- The $$prompt() function will now exit qmake upon EOF on stdin.
|
|
- The touch() function now uses nanosecond precision if available.
|
|
- [MSVC] Qt now has a common mkspec for all Visual Studio versions, called
|
|
"win32-msvc". The old names which contained the version number are now
|
|
gone (but qmake scopes based on the old names continue to work).
|
|
In qmake project files, the version of the compiler can be obtained from
|
|
the MSC_VER and MSVC_VER variables (for example, for Visual Studio 2015,
|
|
those contain the values 1900 and 14.0, respectively). Those variables
|
|
are also available with the Intel compiler (win32-icc) and with Clang
|
|
(win32-clang-msvc).
|
|
- [Windows] The win32-clang-msvc qmakespec will now adjust the emulated
|
|
MSVC version to match that of the cl.exe found in PATH.
|
|
- [Windows] Fixed make 'install' targets to be idempotent.
|
|
- [Windows] '(n)make install' will not fail on file names containing the
|
|
plus sign any more.
|
|
- Numerous obsolete qmakespecs have been pruned.
|