Qt 5.2 introduces many new features and improvements as well as bugfixes over the 5.1.x series. For more details, refer to the online documentation included in this distribution. The documentation is also available online: http://qt-project.org/doc/qt-5.2 The Qt version 5.2 series is binary compatible with the 5.1.x series. Applications compiled for 5.1 will continue to run with 5.2. Some of the changes listed in this file include issue tracking numbers corresponding to tasks in the Qt Bug Tracker: http://bugreports.qt-project.org/ Each of these identifiers can be entered in the bug tracker to obtain more information about a particular change. **************************************************************************** * Important Behavior Changes * **************************************************************************** - Qt is now compiled with qreal typedef'ed to double on all platforms. qreal was a float on ARM chipsets before. This guarantees more consistent behavior between all platforms Qt supports, but is binary incompatible to Qt 5.1 on ARM. The old behavior can be restored by passing -qreal float to configure. - The supported date range in QDateTime has been reduced to about +/- 292 million years, the range supported by the number of msecs since the Unix epoch of 1 Jan 1970 as stored in a qint64, and as able to be used in the setMSecsSinceEpoch() and toMSecsSinceEpoch() methods. - QUrl and QUrlQuery: * [QTBUG-31660] QUrl no longer considers all delimiter characters equivalent to their percent-encoded forms. Now, both classes always keep all delimiters exactly as they were in the original URL text. * [QTBUG-31660] QUrl no longer decodes %7B and %7D to "{" and "}" in the output of toString() * QUrl no longer supports QUrl::FullyDecoded mode in authority() and userInfo(), nor QUrl::DecodedMode in setAuthority() and setUserInfo(). * [QTBUG-31945] QUrl no longer decodes %23 found in the fragment to "#" in the output of toString(QUrl::FullyEncoded) or toEncoded() * QUrl now defaults to decoded mode in the getters and setters for userName, password, host, topLevelDomain, path and fileName. This means a '%' in one of those fields is now returned (or set) as '%' rather than "%25". In the unlikely case where the former behavior was expected, pass PrettyDecoded to the getter and TolerantMode to the setter. * QUrl now normalizes the path given in setPath, removing ./ and ../ and duplicate slashes. **************************************************************************** * Library * **************************************************************************** QtCore ------ - QtAlgorithms With STL no longer being optional for building and using Qt, a number of parts of QtAlgorithms no longer make sense, and have therefore been deprecated. Replacements are available in the STL, and generally have much better performance, but are not instantly source-compatible in all cases. For instance, specialization of qLess or qSwap means that a direct port to std::sort from qSort may not be possible, as std::sort does not use any of them; a possible workaround is explicitly passing a qLess functor to std::sort: std::sort(container.begin(), container.end(), qLess()); The functions in QtAlgorithms that have been deprecated, along with their STL counterparts, are: - qBinaryFind (std::binary_search / std::lower_bound) - qCopy (std::copy) - qCopyBackward (std::copy_backward) - qEqual (std::equal) - qFill (std::fill) - qFind (std::find) - qCount (std::count) - qSort (std::sort) - qStableSort (std::stable_sort) - qLowerBound (std::lower_bound) - qUpperBound (std::upper_bound) - qLess (std::less) - qGreater (std::greater) - QDateTime: * [QTBUG-26161][QTBUG-29666] Fully implement support for Qt::TimeSpec of Qt::OffsetFromUTC, added new methods for offsetFromUTC(), toTimeSpec(), and toOffsetFromUTC(). * Added convenience methods for fromMSecsSinceEpoch() and fromTime_t() to take time spec to be used in returned datetime. * Add method timeZoneAbbreviation() to return effective time zone abbreviation. * The debug datastream is now an ISO-like format instead of Qt::TextDate * The Standard Time to Daylight Time transition for Qt::LocalTime is now handled correctly. Any date set in the "missing" hour is now considered invalid. All date math results that fall into the missing hour will be automatically adjusted to a valid time in the following hour. * Added new method isDaylightTime() to return if the datetime is in Daylight Time or not. * Add support for a new Qt::TimeZone spec to be used with QTimeZone to define times in a specific time zone. - QJson: * [QTBUG-33229] The Writer and the Parser now fully accept non-character unicode points. - QJsonValue: * Added QJsonValue::toInt(). - QStandardPaths: * QStandardPaths::enableTestMode is deprecated and is replaced by QStandardPaths::setTestModeEnabled. - QTime: * [QTBUG-30250] When calling QTime::toString(Qt::TextDate) and QTime::toString(Qt::ISODate), milliseconds are now included in the returned string. This also applies to QDateTime::toString(Qt::TextDate) and QDateTime::toString(ISODate). * Added new methods fromMSecsSinceStartOfDay() to create a new QTime from an msecs value, and msecsSinceStartOfDay() to return the QTime as the number of msecs since the start of the day. - QTimeZone: * Added new QTimeZone class to support time tone calculations using the host platform time zone database and the Olsen time zone ID's. - QUrl: * [QTBUG-33229] QUrl now fully accepts non-character unicode points; they are encoded as percent characters; they can also be pretty decoded - QUtf8: * [QTBUG-33229] UTF-8 now accepts non-character unicode points; these are not replaced by the replacement character anymore - QVariant: * Fixed QVariant::canConvert with longlong * Variant containing enum types can now be converted to integer QtDeclarative ------------- - ColorDialog: * Added currentColor property. QtGui ----- - Session Management: * [QTBUG-28228] The new QPlatformSessionManager class brings back the session management functionality. It allows the implementation of platform specific behavior related to session management. For platform that don't support this feature the default behavior has not changed. Both X11 and Windows session management are supported. - QPolygonF: * When a QVariant holds a QPolygonF() then it will be correctly seen as a null QVariant. QtNetwork --------- - API was added to store and resume TLS session tickets. - The minimum support openssl version has been increased to openssl 1.0. The code to support older versions has not been removed, but is no longer supported. - An off-by-one error in NTLM proxy authentication has been fixed. - Various improvements to reduce the memory used by qtnetwork have been made. - Improved support for HTTP proxy authentication. - Support for preconnecting to servers before making HTTP and HTTPS connections. This allows for much reduced latency when the hosts to be connected to are known. QtPrintSupport -------------- - QPrintDialog: * Added support for setting CUPS job options in the print dialog. * Added support for setting CUPS Banner pages in the print dialog. * Added support for setting CUPS Page Set (even/odd pages only) in the print dialog. * Added support for setting CUPS Pages Per Sheet and Pages Per Sheet Layout options * Added CUPS server-side print range support for apps that can't support print range option themselves QtSql ----- Changes in Qt 5.1.0 (missing from released changelog dist/changes-5.1.0) - [QTBUG-28088] Remove dependency of DB driver headers on qsqlcachedresult_p.h. - Deprecate QSqlError setters. The constructor is sufficient, since it has a parameter for each member variable. - Rename the SQL driver header files to _p.h (make private) The drivers were never public API. They were exposed by mistake in public headers. What's more, they have #include'd a private header (qsqlcachedresult_p.h) since at least Qt 4.5.1. That means no one used those headers in Qt 4 (private headers weren't installed then) and it's unlikely anyone did in 5.0. - ODBC: Implemented lastInsertId() for some ODBC compatible databases. - PSQL: Make lastInsertID work for tables without OIDs. - [QTBUG-14904] SQLITE: Fix for Sql query aliases with dots - [QTBUG-2192] ODBC: fix loss of milliseconds when binding QDateTime - [QTBUG-30076] PSQL: escape backslashes only when server requires it IMPORTANT: Applications that implemented their own workarounds must be updated to avoid misbehavior and SQL injection vulnerabilities. - [QTBUG-10569] ODBC: fixed QODBCResult::exec() return value for DELETE operations when no rows are affected. - ODBC: Fixed loss of column metadata on SQL_NO_DATA. - QSqlTableModel: expose methods for getting primary values. - ODBC: Fixed possible cause of spurious errors (commit af35ee291a1bbbc8) Changes in Qt 5.2.0 - [QTBUG-29261] IBASE: Construct a valid QTime when creating timestamps for iBase SQL driver. - [QTBUG-33389] PSQL: Format QDateTime following ISO8601. - Add QSQLITE_OPEN_URI option to QSQLITE driver QtWidgets --------- - QFileDialog::setDefaultSuffix() removes leading dot characters. - QSizePolicy got a retainSizeWhenHidden attribute. - [QTBUG-31602] QSpinBox size calculation will now be fixed when stylesheets are used. - QAbstractItemView: * [QTBUG-7232] QTBUG-7232 - In ItemViews scrollbars will now by default only scroll 1 pixel when scrollMode is set to scrollPerPixel. That is it will (when scrollMode is scrollPerPixel) do what is stated in the documentation, and no longer automatically adjust the scrollbars singleStep. The user can now control that value. - QAbstractScrollArea: * QAbstractScrollArea now has a SizeAdjustPolicy. If it is set to AdjustToContents it will make use of the protected viewportSizeHint() virtual function. This function returns a suggested size based on contents. Note that although the viewportSizeHint() virtual function was reserved in 5.0, user code was not supposed to be overriding it (as the function was private and undocumented). Code that was overriding viewportSizeHint() needs to be recompiled against 5.2 for this feature to work correctly. - QHeaderView: * [QTBUG-4346] A maximumSize for sections has been introduced. The maximum section size is by default the largest possible section size which in Qt 5.2 has been limited to 1048575 pixels. - QFileDialog: * [QTBUG-34132] QFileDialog does not instantiate widgets if a native dialog will be used instead. Therefore some accessors which previously returned unused objects will now return null. As before, you can set the DontUseNativeDialog option to ensure that widgets will be created and used instead. - QListView: * [QTBUG-1180] Dragging an item outside the QListView in icon mode doesn't lose the icon. - QTableView: * [QTBUG-4206] resizeToContents will now adjust to actual contents and not just visible area. QHeaderView::setAutoResizePrecision() has been introduced to control how precise the autoResize should be. - QTreeView: * QTreeView now has setTreePosition to allow the treestructure to show data from other columns than logicalindex zero. **************************************************************************** * Platform Specific Changes * **************************************************************************** Qt for Windows -------------- - QCoreApplication::arguments() changed the handling of single quotes, double quotes and the backslash character, in order to match what argv[] contains. In particular, single quotes are no longer removed from the argument string. (QTBUG-15379, QTBUG-30628) Qt for Android -------------- - Project structure and deployment has changed with the introduction of androiddeployqt. Source and build files are no longer mixed, and the build files for the APK package should not be touched. Customizing the build files is possible. Read the documentation for androiddeployqt for more information. - Status bar visibility is now controlled by Qt, so the window state will override settings in the AndroidManifest.xml. The default is still to show the status bar (QWindow::showMaximized()). Use QWindow::showFullScreen() to hide it. Windows ------- - [QTBUG-33409][QTBUG-8764][QTBUG-10032] Fixed virtual key mapping on Windows.