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Qt 5.12.4 is a bug-fix release. It maintains both forward and backward
compatibility (source and binary) with Qt 5.12.0 through 5.12.3.
For more details, refer to the online documentation included in this
distribution. The documentation is also available online:
https://doc.qt.io/qt-5/index.html
The Qt version 5.12 series is binary compatible with the 5.11.x series.
Applications compiled for 5.11 will continue to run with 5.12.
Some of the changes listed in this file include issue tracking numbers
corresponding to tasks in the Qt Bug Tracker:
https://bugreports.qt.io/
Each of these identifiers can be entered in the bug tracker to obtain more
information about a particular change.
****************************************************************************
* Platform Specific Changes *
****************************************************************************
- X11 / XCB:
* [QTBUG-45375] QTabletEvent coordinates now come from AbsX/AbsY
valuators in the X11 event, in more precise 32.32 fixed-point format,
scaled to fit the virtual desktop. It's possible to revert to using
the legacy 16.16-format event_x/event_y coordinates as in previous
releases by setting the QT_XCB_TABLET_LEGACY_COORDINATES environment
variable.
****************************************************************************
* QtCore *
****************************************************************************
- Global:
* [QTBUG-72073] Added the QT_NO_FLOAT16_OPERATORS macro in order to work
around a Microsoft <= VS2017 compiler bug that is exposed when using
std::bitset along with any Qt header that includes <qfloat16.h>.
- QDeadlineTimer:
* [QTBUG-69750] Fixed integer overflows leading to immediate timeouts.
- QFile:
* Made QFile::copy() issue a filesystem-synchronization system call,
which would make it less likely to result in incomplete or corrupt
files if the system reboots or uncleanly shuts down soon after the
function returns. New code is advised to use QSaveFile instead, which
also allows to display a progress report while copying.
- QFileInfo:
* [QTBUG-63970][QTBUG-30401][QTBUG-20791] Fixed resolving of symbolic
links to UNC shares on NTFS file systems.
- QMetaObject:
* Non-copyable lambdas can now be used with invokeMethod(). For
consistency reasons, the functor object is now always moved.
****************************************************************************
* QtGui *
****************************************************************************
- [QTBUG-73231] QWindow::mapToGlobal()/mapFromGlobal() now handle windows
spanning screens correctly.
- [QTBUG-75522] QBezier: Fix possible endless loop when stroking curves
****************************************************************************
* QtWidgets *
****************************************************************************
- QMenu:
* Shortcuts are again shown by default in context menus, except on
macOS. They can be forced off by setting
AA_DontShowShortcutsInContextMenus to true.
****************************************************************************
* Third-Party Code *
****************************************************************************
- libpng was updated to version 1.6.37
- Updated QLocale to CLDR v35.1
- Updated bundled SQLite to version 3.28.0
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