396 lines
15 KiB
Plaintext
396 lines
15 KiB
Plaintext
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Qt 5.7 introduces many new features and improvements along with bug fixes
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over the 5.6.x series. Also, there is a change in the licensing terms.
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For more details, refer to the online documentation included in this
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distribution. The documentation is also available online:
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http://doc.qt.io/qt-5.7
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The Qt version 5.7 series is binary compatible with the 5.6.x series.
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Applications compiled for 5.6 will continue to run with 5.7.
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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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http://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 5.6.1 release.
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****************************************************************************
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* Important License Changes *
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****************************************************************************
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- Qt is no longer available under LGPLv2.1. The libraries in this package
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are now available under the following licenses:
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* Commercial License
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* GNU General Public License v2.0 (LICENSE.GPL2) and later
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* GNU Lesser General Public License v3.0 (LICENSE.LGPL3)
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Note that a few Qt Libraries (currently Qt Charts and Qt Data
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Visualization) are available only under the Commercial License and GPL
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version 3.
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- Qt Tools are now available under the following licenses:
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* Commercial License
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* GNU General Public License 3.0 (LICENSE.GPL3) with exceptions
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described in the Qt Company GPL Exception 1.0 (LICENSE.GPL3-EXCEPT)
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****************************************************************************
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* Important Behavior Changes *
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****************************************************************************
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- Starting with Qt 5.7, Qt requires a C++11 compiler with support for
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C++11 atomics. This affects user code too: Qt headers no longer compile
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with a C++98 compiler. The minimum compiler versions for this release
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are:
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* GCC 4.7
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* Clang 3.4 (found in XCode 5.1)
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* Microsoft Visual Studio 2013
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- Support for the following platforms was removed in this version:
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* Apple OS X 10.7 (Lion)
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* Microsoft Windows XP
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* Microsoft Windows Vista
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* Microsoft Windows Embedded Compact 7
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* Microsoft Windows Embedded Compact 2013
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- Support for DirectFB is no longer enabled by default, due to lack of
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development in upstream. To re-enable the platform plugin, pass the
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-directfb option to configure. If there is no renewed interest in this
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platform, the support will be removed in Qt 5.8.
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- Qt no longer ships any fonts.
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- QtGui:
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* [QTBUG-51962] When line height is specified in pixels, this is now
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interpreted as the minimum line height rather than an absolute line
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height to avoid overlaps. To get the old behavior, use the
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-qt-line-height-type property in CSS and set it to "fixed".
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* [QTBUG-46054] QFont::exactMatch() now returns false when the provided
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typeface is an alias.
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- QtWidgets:
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* [QTBUG-21217] QLineEdit will now accept certain shortcut override
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events even if it is read-only.
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- configure & build system:
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* Except on OS X, -system-harfbuzz is now the default.
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* A few obsolete options with no effect are not recognized any more.
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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 5.8:
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* Apple OS X 10.8 (Mountain Lion)
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Deprecated platforms and toolchains continue to work until removed.
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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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- [QTBUG-50548] Added qAsConst().
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- Added qOverload() to select overloaded functions.
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- Added qHash(std::pair), defined in <QHashFunctions>.
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- Added qUtf16Printable().
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- QLocale data updated to CLDR v29
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- QDataStream:
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* [QTBUG-44418] Added startTransaction(), commitTransaction(),
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rollbackTransaction(), abortTransaction() functions to support read
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transactions.
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- QDebug:
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* QDebug can now output std::vector, std::list, std::map, and
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std::multimap.
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- QFlags:
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* [QTBUG-27100] Added setFlag method to set or unset a flag
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- QHash/QSet:
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* Added QHash::equal_range().
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* Added erase(const_iterator).
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- QIODevice:
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* Added support for devices with multiple streams.
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* [QTBUG-44418] Added startTransaction(), commitTransaction(),
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rollbackTransaction(), isTransactionStarted() functions to support
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read transactions.
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- QJsonObject:
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* Added value(), op[] const, find(), constFind(), contains() overloads
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taking QLatin1String.
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- QLocale:
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* Added special value for double conversion precision to get shortest
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accurate representation.
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* Added additional flags in QLocale::NumberOption that allow generating
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and parsing doubles in EcmaScript compliant format.
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* [QTBUG-46595] Added an overload for toCurrencyString() that allows the
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decimal precision to be specified.
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- QMutex:
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* Made the isRecursive() method be a const function so that it can be
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called in const QMutex objects too.
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- QObject:
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* [QTBUG-52542] If the compiler supports variadic templates, functors
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connected to signals will not be copied any more each time the signal is
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emitted. This is the behavior that was exhibited with C++98 compilers.
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- QReadWriteLock:
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* Optimized QReadWriteLock to be faster and take less memory.
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- QRect:
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* Fixed integer overflow in center(). This fixes the result for some
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corner-cases like a 1x1 rectangle at (INT_MIN, INT_MIN), for which the
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previous implementation could return anything (due to invoking
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undefined behavior), but commonly returned (0, 0).
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- QRect/QRectF:
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* Added transposed().
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- QSharedPointer:
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* Added support for debug printing via QDebug.
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- QStorageInfo:
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* [QTBUG-49498] Fixed a bug that caused QStorageInfo to report
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information for the wrong filesystem if there is a mounted filesystem
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at a path that is a prefix of the requested path (e.g., it would
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report "/usr" filesystem for "/usrfoo").
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- QString:
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* Added resize(int, QChar) overload.
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- QStringRef:
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* Added subscript operator.
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* Fixed relational operators against (const char*) to return the correct
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result.
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* Added reverse iterators, rbegin(), rend(), crbegin(), crend().
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- QUuid:
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* Added Objective-C NSUUID/CFUUIDRef converters.
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- QVariant:
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* [QTBUG-53384] Fixed QVariant::canConvert and conversion from integer
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types to enumeration types.
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- QVector:
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* clear() now preserves capacity. To shed capacity, call squeeze() or
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swap with a default-constructed QVector object, see the documentation
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for an example.
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- State Machine:
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* Added constructor overload that takes a pointer-to-member for the
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QSignalTransition.
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QtDBus
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------
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- QDBusArgument:
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* [QTBUG-53376] Deprecated relying on a streamable Base to stream a
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Derived without providing operator<</>>() for Derived. No diagnostic
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provided. Support will be removed in Qt 5.8.
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QtGui
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-----
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- QWheelEvent::phase() now returns NoScrollPhase with non-phase-aware mice.
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This is most mice and input devices except, for now, Apple's trackpads
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and Magic Mouse. It is no longer necessary to set the
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QT_ENABLE_MOUSE_WHEEL_TRACKING environment variable to enable the fix for
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QTBUG-50199.
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- [QTBUG-35972] Added QWheelEvent::inverted() to enable detection of the
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"natural scrolling" system setting. This feature currently only works on
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OS X, though support for other operating systems is planned.
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- Image:
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* [QTBUG-50745] Fixed possible crash in QImage::pixel() for mono or
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indexed images.
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- QIcon:
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* Split fromTheme() in two different overloads, one of which will only
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lazily lookup the icons, in order to speed up startup of applications
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that initialize many icons that are not necessarily visible.
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* fromTheme gained the ability to use the GTK icon cache to speed up
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lookups.
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- QPixmapCache:
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* Added QPixmapCache::Key::isValid().
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- QRawFont:
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* Fixed kerning on advances in QRawFont for OS X and Windows.
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- Tablet support:
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* [QTBUG-47007][QTBUG-51618] A synthetic mouse event will no longer be
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sent after every QTabletEvent, only after those which are not accepted
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(as documented).
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- Text:
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* [QTBUG-35156] Added support for color font rendering with Freetype.
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* [QTBUG-52048] Added QTextOption::ShowDocumentTerminator flag.
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QtNetwork
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---------
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- QAuthenticator:
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* [QTBUG-53338] Fixed crash when comparing a initialized QAuthenticator
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with an uninitialized QAuthenticator.
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QtWidgets
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---------
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- Moved QGtkStyle to the qtstyleplugins repository.
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- [QTBUG-37580] Added the Qt::AA_UseStyleSheetPropagationInWidgetStyles
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attribute which enables font and palette propagation for Qt Style
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Sheets.
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- [QTBUG-48138] QPinchGesture on OS X now behaves like on other platforms:
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totalScaleFactor is the magnitude of the pinch and scaleFactor is the
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delta for the current event.
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- Item Views:
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* [QTBUG-50102] Item views scroll per pixel on OS X now.
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* [QTBUG-50102] QAbstractItemView::verticalScrollMode and
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QAbstractItemView::horizontalScrollMode are now resettable.
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- QAbstractItemView:
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* [QTBUG-7232] In ItemViews when scrollMode is set to scrollPerPixel, it
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is now possible to change the single step. Qt will automatically adjust
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the single step until setSingleStep is called. When setSingleStep is
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called it will however respect that and stop doing automatic changes
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of the value. Calling setSingleStep(-1) will switch mode back to
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automatic adjusting.
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- QAbstractScrollArea, QTextEdit, QPlainTextEdit:
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* [QTBUG-52559] Changed focus to Qt::StrongFocus. That respects
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platforms' native guidelines.
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- QHeaderView:
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* [QTBUG-39010] Fixed some issues with restoring of section size after a
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section is no longer the last visible section (in stretchLastSection
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mode).
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* [QTBUG-50171] Fixed a repainting issue when items had been reordered.
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- QListWidget:
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* [QTBUG-15741] Fixed a bug that caused the default drop action to be
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ignored when using icon mode.
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- QTableView:
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* [QTBUG-50171] Fixed a selection bug when rows or columns were hidden.
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- Styles:
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* [QTBUG-50102] Added SH_ItemView_ScrollMode style hint.
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- Dialogs:
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* [QTBUG-51148] Fixed requesting a font from font dialog with a
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non-existent family name and/or pixel size when using GTK2 platform
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theme.
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QTest
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-----
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- Added a new logging mode that allow test-results to be parsed on-the-fly
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when using Jetbrains TeamCity as CI-server. This mode is enabled by
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using the -teamcity option on the command-line.
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****************************************************************************
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* Platform-specific Changes *
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****************************************************************************
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- The Gtk+ platform theme has been ported to Gtk+ 3.
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- Dropped support for Windows CE.
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- Added support for INTEGRITY RTOS.
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Android
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-------
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- Support for Android API < 16 was removed.
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- [QTBUG-37221] Qt can now be used to easily create Android Services.
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- Allow the user to choose how much from the Android theme is extracted.
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iOS
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---
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- [QTBUG-35271] QBackingStore now uses the raster paint engine instead of
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the OpenGL paint engine, enabling improved antialiased drawing. In case
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of performance regressions, the old code path can be enabled by setting
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the window's surface type to QSurface::OpenGLSurface.
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OS X
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----
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- Support for OS X < 10.8 was removed.
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- [QTBUG-7000] QMacPrintEngine now really sets the printer resolution.
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- [QTBUG-32898] OS X now accepts trusted certificates from the login and
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system keychains.
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- [QTBUG-48953] Pasting text from Qt applications to Apple Mail now works.
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- [QTBUG-48953] "text/vcard" is now required as the mime type when
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placing vCards on the clipboard.
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- [QTBUG-50262] QStandardPaths now returns the correct display name for
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the download folder.
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Windows
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-------
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||
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- [QTBUG-390][QTBUG-6917][QTBUG-9350][QTBUG-24619] Added method
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QProcess::setCreateProcessArgumentsModifier() to enable users to
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intercept and modify CreateProcess parameters.
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- Added support for color fonts (color emojis) when DirectWrite 2 is
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available.
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- Text:
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* [QTBUG-47141] Made it possible to disable antialiasing for text when
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drawing into images.
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* [QTBUG-18711] Fixed disabling hinting for application fonts, e.g. when
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automatic scaling by device pixel ratio is in effect.
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XCB / X11
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---------
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- [QTBUG-44964] It's now possible to unset AA_CompressHighFrequencyEvents
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to disable the new X event compression feature that was added in 5.6.0.
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This is a replacement for the WA_NoX11EventCompression flag in Qt 4.
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- [QTBUG-49071] Fixed failure to deliver focusIn event on hide/show with XCB
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- QMenuBar now uses the unified D-Bus AppMenu menubar when the desktop
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environment supports it.
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||
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|
****************************************************************************
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||
|
|
* Tools *
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||
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|
****************************************************************************
|
||
|
|
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||
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|
moc
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||
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---
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||
|
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||
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- [QTBUG-53441] Fixed crash when processing files ending with \\\r.
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configure & build system
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||
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|
------------------------
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||
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||
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- [QTBUG-35754] Static builds now embed QML resources into the libraries
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to make them self-contained.
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- [QTBUG-35886][Unix] Made it explicit that -fontconfig implies
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-system-freetype.
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- [QTBUG-43784][Unix] Fixed GLX not being enabled with -qt-xcb.
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- [QTBUG-45291][GCC] Enabled use of Qt with -Wzero-as-null-pointer-constant.
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- [Android@Windows] Fixed configure tests outside QtBase.
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- [Unix] Fixed config.log corruption with option -v.
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- [Unix] Fixed the MySQL configure test on RHEL 6.6.
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- [Android] Enabled building with newer SDKs than the minimal supported one.
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||
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- QNX and Android builds on Windows use -system-zlib now.
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||
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- Added support for "Canadian Cross Builds"; options -external-hostbindir
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and -host-option.
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||
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- Added makespecs for DRIVE CX (Tegra X1), NVIDIA Jetson TK1, and i.MX7
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||
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boards.
|
||
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- Qt now makes use of AVX512 instructions on Intel platforms.
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||
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||
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qmake
|
||
|
|
-----
|
||
|
|
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||
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- Specifying directories in RESOURCES now actually works.
|
||
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|
- Added -qtconf option to make it possible to use the same qmake binary
|
||
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|
with several builds of Qt.
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