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@ -0,0 +1,497 @@
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Qt 5.8 introduces many new features and improvements as well as bugfixes
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over the 5.7.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 5.8 series is binary compatible with the 5.7.x series.
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Applications compiled for 5.7 will continue to run with 5.8.
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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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This release contains all fixes included in the Qt 5.7.1 release.
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****************************************************************************
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* License Changes *
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****************************************************************************
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Static libraries that are linked into executables (winmain and
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qopenglextensions) are now licensed under BSD _and_ commercial licenses.
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****************************************************************************
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* Deprecation Notice *
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****************************************************************************
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- The following platforms or toolchains are deprecated and will be
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removed as of Qt 5.9:
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* Apple OS X Mavericks (v10.9)
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* Apple iOS 7.x
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Deprecated platforms and toolchains continue to work until removed.
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- The Q_OBJECT_CHECK macro is deprecated and will be removed in Qt 6. The
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internal, template function qt_check_for_QOBJECT_macro that it created in
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QObject-derived classes will be removed in Qt 5.9.
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****************************************************************************
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* Important Behavior Changes *
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****************************************************************************
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- Support for the following platforms was removed in this version:
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* Apple OS X Mountain Lion (v10.8)
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* Apple iOS 6.x
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configure & build system
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------------------------
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- The configuration system has been rewritten almost from scratch. This
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improved the consistency between builds on Unix and Windows, but some
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subtle unintended behavior changes are also possible. Also, some
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obsolete options have been entirely removed and will now cause errors.
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- It is not permissible any more to manually #define QT_NO_<FEATURE>
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anywhere. Instead, configure's -no-feature-* options must be used.
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Note that this does not apply to defines which modify behavior rather
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than entirely removing features.
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- Configure test results are now cached. Use -recheck or -recheck-all
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to discard them.
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- [QTBUG-32530][QTBUG-42962] The Unix configure won't pick up CFLAGS and
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related environment variables any more. Instead, it now accepts QMAKE_*
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variable assignments on the command line.
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- [QTBUG-52266] Configure won't pick up QMAKESPEC from the environment
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any more. Use the -platform option instead.
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- Device and simulator libraries are now combined on Apple device
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platforms (iOS). This means that there will no longer be any
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*_simulator.a libraries and the simulator architectures will simply
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reside alongside the device architectures in a single Mach-O file.
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- [Darwin] Project files may not override QMAKE_MAC_SDK any more.
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QtCore
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------
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- qFatal will now use std::abort to terminate the application on all
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operating systems. Previously, ::abort() or ::exit(1) were called,
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depending on the operating system.
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- QLibraryInfo::licensee()/licensedProducts() were deprecated and
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return empty strings now.
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- Destroying a QThread which is still running will now result in
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immediate and abnormal program termination.
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QtGui
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-----
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- [QTBUG-54936] QFont::toString() and QFont::key() were modified to save
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the font's style name if one is set, invalidating any stored font
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identifiers. QFont::fromString() was also adjusted to accommodate the
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change.
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QtNetwork
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---------
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- Proxies from system settings will now be used by default. Configure
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with -no-system-proxies to disable.
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- [QTBUG-53649] libproxy is now turned off by default. Configure with
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-libproxy in order to enable it again.
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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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- Disambiguated the relational operators comparing QByteArray with
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QStringRef (and vice versa).
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- Added qHash() overloads for QHash, QMultiHash.
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- Added QDeadlineTimer, a counterpart to QElapsedTimer, used to mark a
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time point in the future (a deadline) and determine whether such a
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deadline has passed.
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- Qt now relies on type traits from the C++11 standard library.
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- [QTBUG-54981] Added Q_NAMESPACE, which can be used to add Q_ENUM_NS/
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Q_ENUMS, Q_FLAG_NS/Q_FLAGS and Q_CLASSINFO to a namespace.
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- Q_IS_ENUM was deprecated. Use std::is_enum<>::value instead.
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- QChar:
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* Added missing operator{<,>,<=,>=} comparing against QLatin1String and
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QStringRef.
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* Added missing operator{==,!=} comparing against QLatin1String.
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- QCommandLineOption:
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* Added flags() and setFlags() methods. Added ShortOptionStyle and
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HiddenFromHelp flags.
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- QDateTime:
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* Introduced toSecsSinceEpoch, fromSecsSinceEpoch and setSecsSinceEpoch
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functions, which use 64-bit integers to represent the number of
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seconds.
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* The toTime_t, fromTime_t and setTime_t functions are deprecated and
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will be removed in Qt 6.0. For new code, use the equivalent functions
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with "SecsSinceEpoch" in the name, or the equivalent ones with
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millisecond accurancy that have existed since Qt 4.7.
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* Added string formatting type Qt::ISODateWithMs.
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- QFileInfo:
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* QFileInfo now reports file times with millisecond precision on Unix
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systems.
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- QFileSystemWatcher:
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* [QTBUG-55896] Fixed a bug that caused QFileSystemWatcher to mis-handle
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file paths that contained non-US-ASCII characters on Apple platforms.
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- QJsonDocument:
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* [QTBUG-39751] fromVariant can now take a QVariantHash argument.
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* Fixed a number of bugs that could cause crashes when loading corrupt
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binary JSON data.
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- QJsonValue:
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* [QTBUG-43077] QJsonValue(Null).toVariant() now returns a QVariant of
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type QMetaType::Nullptr instead of an invalid QVariant.
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- QLatin1String:
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* Added at(), operator[](), mid(), right(), left().
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- QLibraryInfo:
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* Added QLibraryInfo::version(), which returns the current version of
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the Qt library as a QVersionNumber object.
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- QLine/QLineF:
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* Added center().
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- QLockFile:
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* Fixed a bug that caused QLockFile to over-sleep while waiting for the
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lock file to become available.
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- QMetaType:
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* std::nullptr_t is now a built-in Qt metatype.
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- QModelIndex:
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* QModelIndex::child has been deprecated due to its lack of generality.
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Use model->index(row, column, index) instead.
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- QMutex:
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* QMutex now fully models the TimedLockable concept by providing the
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try_lock, try_lock_for and try_lock_until functions, therefore making
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it usable in Standard Library lock management classes and functions.
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- QObject:
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* The QT_NO_NARROWING_CONVERSIONS_IN_CONNECT macro has been added. When
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using the new connection syntax (PMF-based) this macro makes it
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illegal to narrow the arguments carried by the signal, and/or to
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perform floating point to integral implicit conversions on them. When
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the macro is defined, depending on your compiler a QObject::connect()
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statement triggering such conversions will now fail to compile.
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- QPersistentModelIndex:
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* QPersistentModelIndex::child has been deprecated due to its lack of
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generality. Use model->index(row, column, index) instead.
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- QStringList:
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* Added join(QLatin1String) overload.
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- QStringRef:
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* Added missing operator{<,>,<=,>=} comparing against QLatin1String and
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QString.
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- QSysInfo:
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* The output of QSysInfo::prettyProductName now includes the Windows
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OS/kernel version number. In case of future versions of Windows, a
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valid string is now returned.
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- QSettings:
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* [QTBUG-56124] Fixed a bug that caused QSettings to fail on Apple
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platforms when strings with embedded null (\0) bytes were present
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- QSharedPointer:
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* [QTBUG-52369] Fixed a bug that caused QSharedPointer to fail to compile
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if it was initialized with a nullptr literal.
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* Fixed a bug that made QSharedPointer delete the pointer it held with the
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wrong destructor if the type of the QSharedPointer and that of the object
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passed on the constructor were different. Its behavior is now the same as
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std::shared_ptr.
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- QStandardPaths:
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* [QTBUG-55507] Fixed the QStandardPaths::FontsLocation on XDG systems to
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be $XDG_DATA_DIR/fonts.
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* Fixed handling of potential paths that do not exist on Windows. Now,
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QStandardPaths may return storage locations that may not exist on all
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platforms.
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- QTimer:
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* Added support for std::chrono duration objects for QTimer methods,
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like QTimer::singleShot and QTimer::setInterval.
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- QWaitCondition:
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* Added notify_one() and notify_all() to make QWaitCondition be usable from
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algorithms that use the Standard Library naming convention.
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QtDBus
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------
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- QDBusConnection:
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* Fixed a bug that would cause QDBusConnection::connect() to return true
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if a slot was already connected to the same D-Bus signal. QtDBus does
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not support multiple connections.
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QtGui
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-----
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- [QFileDialogOptions/QFontDialogOptions/QMessageDialogOptions/
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QColorDialogOptions] These classes no longer have value semantics, but
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need to be held in QSharedPointer (as they always were). To copy an
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instance, use the clone() method.
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- QOpenGLTextureBlitter, a utility class to draw textured quads, has been
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made public.
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- [QTBUG-38825] Fixed QTextEdit to match undo functionality of QLineEdit
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to group two sequential inserts into one undo action.
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- [QTBUG-51844] Added rotation and uniqueId properties to
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QTouchEvent::TouchPoint. This is mainly for the benefit of the TUIO
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plugin so far: it now supports tracking physical objects (fiducials)
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on the touchscreen surface, as long as the object's ID can fit in a
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64-bit integer. QPointingDeviceUniqueId is a wrapper for the ID,
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designed to be extensible to support other types of IDs in the future.
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- [QTBUG-52510] A stationary touchpoint event is delivered if its
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velocity changes. This is to ensure that the application will be
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notified when a TUIO fiducial object comes to rest.
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- [QTBUG-53076] Add QGuiApplication::applicationDisplayNameChanged()
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signal.
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- QAbstractTextDocumentLayout:
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* Added imageAt() and formatAt() methods, which respectively can be used
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to retrieve the source link of the image under the cursor, or the
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QTextFormat of the text under the cursor.
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- QFont:
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* [QTBUG-48043] The default value of QFont::stretch() is now 0 to
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indicate any default stretch is acceptable.
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- QRegion:
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* Is now iterable as a container of QRects: added {c,}{r,}{begin,end}().
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- Text handling:
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* [QTBUG-51411] Fixed performance hit from showing large QTextDocuments
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in a QTextEdit or QTextBrowser. (Regression introduced in Qt 5.3.0)
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* [QTBUG-50090] Fixed line spacing with some scalable fonts containing
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bitmaps with the Freetype font engine.
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* [QTBUG-56346] Fixed QStaticText when manually breaking lines and no
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text width was set.
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* [QTBUG-56659] Fixed a regression where raster fonts on Windows were
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detected as smoothly scalable and thus rendering with said fonts in Qt
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Quick would break.
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* [QTBUG-51223] Fixed synthesized oblique for non-latin text on
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platforms using the basic font database, such as Android.
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* [QTBUG-56672] Fixed list of supported sizes for bitmap fonts on
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Windows.
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* [QTBUG-56714] Fixed a bug where a no-break space would sometimes cause
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the first character of the containing line to not be displayed.
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* [QTBUG-55856] Fixed rendering of large fonts when a device pixel ratio
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is set and the Freetype engine is used.
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QtNetwork
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---------
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- Added QNetworkDatagram class, along with new function receiveDatagram()
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in QUdpSocket that returns it, and an overload to writeDatagram() that
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can accept it.
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- Added QSctpServer and QSctpSocket classes. Note that these need to be
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explicitly enabled via a configure option.
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- [QTBUG-50956] Added support for HTTP/2 protocol
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- QSslSocket:
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* [QTBUG-39077] TLS PSK ciphers are possible in server sockets.
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* It is now possible to set custom Diffie-Hellman parameters for
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QSslSocket-based servers.
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- QTcpServer:
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* [QTBUG-51288] It is now possible to use QTcpServer with an externally
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created QTcpSocket.
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QtSql
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-----
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- QSqlDatabase:
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* When connecting to a MySQL server whose version is 5.5.3 or higher,
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the default connection charset is now utf8mb4 instead of utf8 to allow
|
|
|
|
|
4-byte UTF-8 encodings.
|
|
|
|
|
|
|
|
|
|
- SQLite:
|
|
|
|
|
* Added notification feature to SQLite driver
|
|
|
|
|
|
|
|
|
|
QTestLib
|
|
|
|
|
--------
|
|
|
|
|
|
|
|
|
|
- [QTBUG-44030] Added QTest::createTouchDevice() for use in autotests
|
|
|
|
|
which generate touch events.
|
|
|
|
|
- Added ref-cycles perf counter.
|
|
|
|
|
- QFETCH variables can now be declared const (QFETCH(const T, name)).
|
|
|
|
|
- It is now possible to use variables of types with an explicit operator
|
|
|
|
|
bool in the QVERIFY macro.
|
|
|
|
|
|
|
|
|
|
QtWidgets
|
|
|
|
|
---------
|
|
|
|
|
|
|
|
|
|
- QFormLayout:
|
|
|
|
|
* [QTBUG-15990] Added removeRow(), takeRow().
|
|
|
|
|
|
|
|
|
|
- QMainWindow:
|
|
|
|
|
* [QTBUG-56628] Fixed crash using takeCentralWidget when the central
|
|
|
|
|
widget was not set.
|
|
|
|
|
|
|
|
|
|
****************************************************************************
|
|
|
|
|
* Platform-specific Changes *
|
|
|
|
|
****************************************************************************
|
|
|
|
|
|
|
|
|
|
- Added technology preview support for Apple tvOS and Apple watchOS.
|
|
|
|
|
- Added initial support for Microsoft Visual Studio 2017, which uses the
|
|
|
|
|
mkspec "win32-msvc2017". Full support will happen after the final release
|
|
|
|
|
of that compiler.
|
|
|
|
|
|
|
|
|
|
Android
|
|
|
|
|
-------
|
|
|
|
|
|
|
|
|
|
- [QTBUG-48948] Show password while typing is now supported
|
|
|
|
|
- [QTBUG-55035][QTBUG-50759] Introduced a mechanism to forward
|
|
|
|
|
permission related callbacks on Activity objects to interested
|
|
|
|
|
parties.
|
|
|
|
|
|
|
|
|
|
Apple platforms
|
|
|
|
|
---------------
|
|
|
|
|
|
|
|
|
|
- Added QImage::toCGImage() that returns a CGImage.
|
|
|
|
|
- Added functions that convert Qt types QPoint/QPointF, QRect/QRectF and
|
|
|
|
|
QSize/QSizeF to and from CGPoint, CGRect and CGSize. Note that QPoint,
|
|
|
|
|
QRect and QSize do not provide fromCGXxx functions since that would
|
|
|
|
|
silently lose precision.
|
|
|
|
|
|
|
|
|
|
iOS
|
|
|
|
|
---
|
|
|
|
|
|
|
|
|
|
- Precompiled headers are now supported on iOS.
|
|
|
|
|
- Starting from iOS 10, Apple requires all apps that need access to photos
|
|
|
|
|
to have the key 'NSPhotoLibraryUsageDescription' in the Info.plist.
|
|
|
|
|
Therefore, to get the same support in Qt (when, e.g., using a file
|
|
|
|
|
dialog), the Info.plist assigned to QMAKE_INFO_PLIST will need this key
|
|
|
|
|
as well.
|
|
|
|
|
|
|
|
|
|
macOS
|
|
|
|
|
-----
|
|
|
|
|
|
|
|
|
|
- Speech to text dictation now works for Qt text input.
|
|
|
|
|
- [QTBUG-33708] Fixed underline position in font rendering.
|
|
|
|
|
|
|
|
|
|
Linux
|
|
|
|
|
-----
|
|
|
|
|
|
|
|
|
|
- [QTBUG-39959] QWidget-based applications running on the eglfs platform
|
|
|
|
|
plugin can now request 180 or 90 degrees rotated output by setting the
|
|
|
|
|
QT_QPA_EGLFS_ROTATION environment variable.
|
|
|
|
|
- KDE/Gnome themes now implement QPlatformTheme::fileIconPixmap(), showing
|
|
|
|
|
file icons.
|
|
|
|
|
|
|
|
|
|
Windows
|
|
|
|
|
-------
|
|
|
|
|
|
|
|
|
|
- [QTBUG-31476] QFactoryLoader now filters potential plugins by the
|
|
|
|
|
".dll" suffix.
|
|
|
|
|
- [QTBUG-56239] 'What's this' button is now shown by default only for
|
|
|
|
|
QWidget dialogs.
|
|
|
|
|
- [QTBUG-53833] QProcess::startDetached() changed behavior on Windows:
|
|
|
|
|
it no longer creates a new console window unconditionally, instead it
|
|
|
|
|
passes the same creation flags to CreateProcess as QProcess::start().
|
|
|
|
|
|
|
|
|
|
- Text handling:
|
|
|
|
|
* [QTBUG-54740] Fixed embedding fonts in PDF when dpi scaling is active
|
|
|
|
|
or when the hinting preference was none or vertical hinting.
|
|
|
|
|
* [QTBUG-47485] Fix selecting non-regular fonts when using the Freetype
|
|
|
|
|
engine.
|
|
|
|
|
* [QTBUG-49346] Fixed rendering error when using the MingLiU fonts at
|
|
|
|
|
certain combinations of pixel size and scale.
|
|
|
|
|
|
|
|
|
|
****************************************************************************
|
|
|
|
|
* Tools *
|
|
|
|
|
****************************************************************************
|
|
|
|
|
|
|
|
|
|
configure & build system
|
|
|
|
|
------------------------
|
|
|
|
|
|
|
|
|
|
- The -no-feature-* option family was integrated with the rest of the
|
|
|
|
|
configuration system. Numerous existing features were made optional,
|
|
|
|
|
and build problems in various reduced configurations were fixed.
|
|
|
|
|
This is an ongoing effort known as "Qt Lite".
|
|
|
|
|
- Numerous Qt modules outside qtbase now support configure options.
|
|
|
|
|
In a module-by-module build, these can be passed to qmake itself,
|
|
|
|
|
after a -- option.
|
|
|
|
|
- Introduced the qtConfig(<feature>) qmake function to replace the
|
|
|
|
|
patterns contains(QT_CONFIG, <feature>) and load(qfeatures)+
|
|
|
|
|
contains(QT_DISABLED_FEATURES, <feature>).
|
|
|
|
|
Likewise, the C++ macro QT_CONFIG(<feature>) was introduced to
|
|
|
|
|
replace the pattern !defined(QT_NO_<FEATURE>).
|
|
|
|
|
The old methods are effectively deprecated and will stop working at
|
|
|
|
|
some point in the near future.
|
|
|
|
|
- Use of -sysroot will now trigger a cross-build even if -platform and
|
|
|
|
|
-xplatform are the same.
|
|
|
|
|
- The JPEG & GIF handlers and the SQL drivers are now always built as
|
|
|
|
|
plugins, even in static builds (static "plugins" in this case).
|
|
|
|
|
- [GCC] Include paths from system libraries are now marked as such,
|
|
|
|
|
resulting in fewer warnings the user cannot do anything about.
|
|
|
|
|
- [Windows] config.status.bat is now created, like on Unix.
|
|
|
|
|
- [QTBUG-46974] Fixed location of config.status in top-level builds.
|
|
|
|
|
- [QTBUG-38792][Unix] The -redo option is now accepted, like on Windows.
|
|
|
|
|
- It's now possible to add more arguments when -redo is used. Note that
|
|
|
|
|
these arguments are not saved in turn. Likewise for config.status.
|
|
|
|
|
- [QTBUG-32896][iOS/clang] Added missing CFBundleIdentifier to library
|
|
|
|
|
template.
|
|
|
|
|
- [QTBUG-47624] Fixed abort when some, but not all, XCB dependencies
|
|
|
|
|
are met. The feature is now disabled instead, as expected.
|
|
|
|
|
- [QTBUG-50838] The Raspberry Pi EGL detection now uses pkg-config.
|
|
|
|
|
- [QTBUG-52112][Android] Plugins now have a SONAME, as required by
|
|
|
|
|
Android 6+.
|
|
|
|
|
- [QTBUG-54438] Fixed launching tests, examples, and build tools in
|
|
|
|
|
some configurations.
|
|
|
|
|
- [QTBUG-56289][GCC@Windows] Fixed -separate-debug-info.
|
|
|
|
|
- [QTBUG-57086] Added support for Visual Studio 2017.
|
|
|
|
|
|
|
|
|
|
qdbusxml2cpp
|
|
|
|
|
------------
|
|
|
|
|
|
|
|
|
|
- [QTBUG-34126] qdbusxml2cpp now supports the --verbose switch, which
|
|
|
|
|
provides more details when parsing invalid XML sources.
|
|
|
|
|
|
|
|
|
|
qmake
|
|
|
|
|
-----
|
|
|
|
|
|
|
|
|
|
- Added the $$take_first(), $$take_last(), $$num_add(), $$str_size(),
|
|
|
|
|
$$str_member(), and $$sorted() functions.
|
|
|
|
|
- The error() function can now be called without arguments to exit
|
|
|
|
|
silently. Use after write_file() and similar functions which already
|
|
|
|
|
print an error message.
|
|
|
|
|
- The $$system() function can return the command's exit code now.
|
|
|
|
|
- The $$prompt() function can now print the prompt verbatim.
|
|
|
|
|
- QMAKE_EXTRA_TARGETS will now consistently treat the target as a file
|
|
|
|
|
name (separator adjustment and quoting).
|
|
|
|
|
- [QTBUG-16904][VS] Fixed warning about circular dependencies when
|
|
|
|
|
Q_OBJECT is used in .cpp files.
|
|
|
|
|
- [QTBUG-36256] packageExists() and PKGCONFIG can now be used
|
|
|
|
|
regardless of whether Qt itself was built with pkg-config support.
|
|
|
|
|
- [QTBUG-43468][WinRT] Added option to use verbatim manifest files.
|
|
|
|
|
- [QTBUG-53905] Fixed OBJECTIVE_SOURCES being moc'd twice.
|
|
|
|
|
- [QTBUG-55591][VS2015] Added support for the /DEBUG:FASTLINK option.
|
|
|
|
|
- [QTBUG-56507] Fixed parallel builds when a lex source refers to a
|
|
|
|
|
file generated from a yacc source.
|
|
|
|
|
- [QTBUG-56594][MSVC] Fixed PDB files not being installed for static
|
|
|
|
|
libraries.
|
|
|
|
|
|
|
|
|
|
moc
|
|
|
|
|
---
|
|
|
|
|
|
|
|
|
|
- [MSVC] qmake and moc now cooperate to use the Visual Studio environment
|
|
|
|
|
variables (set by the VCVARSALL.BAT script) to find system include
|
|
|
|
|
files. A possible consequence is that moc parses application headers
|
|
|
|
|
slightly differently, depending on #if conditions that depended on
|
|
|
|
|
macros that previous versions had not seen #define'd. Implementers of
|
|
|
|
|
other buildsystems are advised to pass the --compiler-flavor=msvc option
|
|
|
|
|
to moc.
|
Liang Qi