| Qt 5.12 introduces many new features and improvements as well as bugfixes |
| over the 5.11.x series. 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. |
| |
| **************************************************************************** |
| * Important Behavior Changes * |
| **************************************************************************** |
| |
| - QtCore: |
| * [QTBUG-34460] qFatal() no longer uses std::abort() on Windows, as |
| there are circumstances where global destructors are still run after |
| that call, leading to possible deadlocks. |
| - QRegularExpression: |
| * [QTBUG-66781] Regular expressions are now automatically optimized |
| (including JIT compiling) on their first usage. The pattern options |
| OptimizeOnFirstUsageOption and DontAutomaticallyOptimizeOption no |
| longer have any effect, and will get removed in a future version of |
| Qt. QRegularExpression::optimize() can be still used to compile and |
| optimize the regular expression in advance (before any match), if |
| needed. |
| - QDataStream: |
| * [QTBUG-59978][QTBUG-67995] version bumped up to 18 to account for |
| changes in the serialization of QGradient. |
| - Dialogs: |
| * QFileSystemModel now uses QRegularExpression internally for wildcard |
| matching. Note that QRegularExpression might not give the exact same |
| result as QRegExp as its implementation follows strictly the glob |
| patterns definition for wildcard expressions. |
| |
| **************************************************************************** |
| * Third-Party Code * |
| **************************************************************************** |
| |
| - Sources of xcb-xinput 1.13 were bundled and are available via -qt-xcb. |
| - The minimal required version of libxcb is now 1.9. Bundled xcb sources |
| were updated to libxcb 1.9.1 built with xcb-proto 1.8. |
| - [QTBUG-67654] Updated CLDR to version 33.1 |
| - [QTBUG-71144] Updated CLDR to version 34 |
| - [QTBUG-66561][QTBUG-70008] double-conversion got updated to upstream |
| version 3.1.1. |
| - libjpeg-turbo was updated to version 2.0.0 |
| - libpng was updated to version 1.6.35 |
| - Sqlite was updated to version 3.25.2 |
| - [QTBUG-71109] updated bundled libxkbcommon 0.4.1 -> 0.8.2 (up to |
| 31f1f355700870c6615399fbfa7934934b3a9a57) |
| - PCRE2 was updated to version 10.32. |
| - Added documentation for the SLJIT part of pcre2, which is available |
| under the BSD-2-Clause license. |
| |
| **************************************************************************** |
| * Tools * |
| **************************************************************************** |
| |
| - rcc: |
| * Added a --list-mapping option which shows a mapping of resource paths |
| to file system paths. |
| |
| - qmake |
| * New CONFIG options lrelease and embed_translations were added. |
| CONFIG+=lrelease does run lrelease on translation files listed in |
| TRANSLATIONS and EXTRA_TRANSLATIONS. CONFIG+=embed_translations does |
| include the generated .qm files as resources under :/i18n/. |
| |
| - uic |
| * [QTBUG-65251][QTBUG-51602] The -no-stringliteral option is now |
| deprecated and UIC will not generate QStringLiteral anymore. |
| |
| **************************************************************************** |
| * QtCore * |
| **************************************************************************** |
| |
| - Added support for CBOR: |
| * Added QCborStreamReader and QCborStreamWriter, classes for low-level |
| reading and writing of CBOR streams. |
| * Added QCborValue, QCborArray and QCborMap, classes that permit DOM-like |
| access to CBOR data. The API is similar to QJsonValue, QJsonArray and |
| QJsonObject, respectively. |
| |
| - QByteArray: |
| * Added QByteArray::isUpper() and QByteArray::isLower() to check if a |
| byte array contains only uppercase or only lowercase Latin1 letters. |
| * Added compare(), which takes Qt::CaseSensitivity as one of the |
| parameters. This function is more efficient than using toLower() or |
| toUpper() and then comparing. |
| * [QTBUG-66187] QByteArray::toInt(), QByteArray::toDouble() and the |
| other number conversion functions now ignore leading and trailing |
| whitespaces, as their QString counterparts already did. For |
| consistency reasons, the same behavior was added to |
| qEnvironmentVariableIntValue() also. |
| |
| - QCommandLineParser: |
| * [QTBUG-70174] Fixed a bug that caused the help output to show two |
| options or more in the same line if the options didn't have a |
| description. |
| |
| - QCryptographicHash: |
| * Add a static method, hashLength, which returns the length of the |
| output of a hash function in bytes. |
| |
| - QDir: |
| * QDir now uses QRegularExpression internally for wildcard matching. |
| Note that QRegularExpression might not give the exact same result as |
| QRegExp as its implementation follows strictly the glob patterns |
| definition for wildcard expressions. Nevertheless, the tests for QDir |
| return the same results as before. |
| * QDir::tempPath() now reports the canonical path of the temporary |
| directory, with any symlinks resolved. |
| * On Windows, QDir::drives() no longer returns drives whose media were |
| ejected. |
| |
| - QExplicitlySharedDataPointer: |
| * [QTBUG-66635][QTBUG-66946] Added operator== for nullptr. |
| |
| - QFile: |
| * [QTBUG-13470] When opening a file, if Truncate is asked for, or |
| implied by other flags, it shall be attempted, regardless of what |
| other options are selected. We previously did this on Windows; now we |
| do so also on Unix (even when appending). |
| |
| - QFileSystemWatcher: |
| * [QTBUG-69320] Fixed a bug that caused addPaths() to crash on Windows |
| if adding a path to be watched on removable storage, if that |
| addPaths() was called on a thread not created by QThread and no |
| QEventLoop has been created yet. |
| |
| - QFlags's operator| for enum types in the Qt namespace are now declared |
| in the Qt namespace itself. |
| |
| - QLocale: |
| * [QTBUG-57802] Added support for World and Europe as (numeric) |
| "country" codes ("territory" in CLDR terms), thereby enabling support |
| for Yiddish and Esperanto, among other locales using such codes. |
| |
| - Logging: |
| * [QTBUG-69548] Qt will now accept qtlogging.ini files written by |
| QSettings. |
| |
| - QMetaType can now register constructor for a set of dynamic types. |
| |
| - QRegularExpression: |
| * Implemented support for wildcard patterns through a static method. |
| * QRegularExpression now provides anchoredPattern() which is a helper |
| function to build regular expressions used for exact matching. |
| * Implemented support for wildcard patterns. Warning: QRegularExpression |
| might not give the exact same result as QRegExp as its implementation |
| follows strictly the glob patterns definition for the wildcard |
| expressions. |
| |
| - [QTBUG-62894] Introduced QScopeGuard. |
| |
| - QSharedDataPointer: |
| * [QTBUG-66635][QTBUG-66946] Added operator== for nullptr. |
| |
| - QSortFilterProxyModel: |
| * [QTBUG-46810] QSortFilterProxyModel now supports QRegularExpression. |
| * Setters of both the filterRegExp and filterRegularExpression |
| properties are now slots and can be used with the old as well as the |
| new syntax. |
| |
| - QString: |
| * Added the functions QString::isUpper() and QString::isLower() to check |
| if a string contains only uppercase or only lowercase letters. |
| |
| - QTextCodec: |
| * [QTBUG-56203] QTextCodec automatically deregisters on destruction now. |
| |
| - QTimer: |
| * [QTBUG-69800] Fixed singleShot() methods that lacked proper "const" |
| qualification to QObject context receivers. |
| * Added QTimer::connectTo(), a shorthand way of connecting to the |
| timeout() signal. |
| |
| - QTranslator: |
| * [QTBUG-31031] It is now possible to load qm files without any |
| translations. This is particularly useful for the language the |
| untranslated strings are written in; logic to load translations can |
| now handle the source language like all other languages. |
| |
| - QUndoStack: |
| * [QTBUG-40040] Exposed canUndo, canRedo, undoText, redoText and clean as |
| Q_PROPERTYs. |
| |
| - QUrl: |
| * Fixed a bug that caused QUrl::matches to incorrectly compare two URLs |
| with different hostnames or different usernames as equal, if certain |
| QUrl::RemoveXxx options were passed. |
| |
| - other: |
| * Added an overload of q{To,From}{Big,Little}Endian that operates on a |
| memory region. |
| * Added the QT_TR_N_NOOP(), QT_TRANSLATE_N_NOOP(), and |
| QT_TRANSLATE_N_NOOP3() macros for numeral dependent delayed |
| translation. |
| |
| **************************************************************************** |
| * QtGui * |
| **************************************************************************** |
| |
| - QBitmap: |
| * Added overloaded QBitmap::fromImage that takes QImage rvalue. |
| |
| - QDocumentWriter: |
| * [QTBUG-63581] QDocumentWriter now supports table borders, table |
| alignment, table width, column widths, line height and image |
| resolution when exporting QTextDocuments to ODF files. |
| |
| - QGradient: |
| * [QTBUG-59978][QTBUG-67995] Added ObjectMode coordinate mode. |
| |
| - QGuiApplication: |
| * [QTBUG-26413] Fixed queryKeyboardModifiers() on macOS to actually return |
| the current modifier key state. |
| |
| - QImage: |
| * [QTBUG-45858] QImage now supports 64bit image formats with 16 bits per |
| color channel, compatible with 16bpc PNG or RGBA16 OpenGL formats. |
| |
| - QIntValidator: |
| * [QTBUG-59650] Input value with over the highest acceptable value, but |
| with no more digits than the maximum value, is now considered |
| intermediate. |
| |
| - QOpenGLShader: |
| * [QTBUG-66074] QOpenGLShader has been fixed to expose geometry and |
| tessellation evaluation/control shaders with OpenGL ES 3.2. |
| |
| - QPagedPaintDevice: |
| * The default constructor has been deprecated since that class is |
| not meant to be used standalone. The two public but internal |
| devicePageLayout() methods are now deprecated. |
| |
| - QPainter: |
| * [QTBUG-67248] Fixed drawTiledPixmap() and texture-brush painting with |
| high-DPR images. |
| * QPainter::drawTiledPixmap() now tiles in the device independent |
| coordinate system. |
| |
| - QPicture: |
| * [QTBUG-71208] Fixed a crash reading malformed picture file. |
| |
| - QStandardItemModel: |
| * itemData does not return role 255 any more. |
| |
| - QTextImageFormat: |
| * Added two new functions to the class: setQuality(int=100) and |
| quality(). They are currently used by QTextODFWriter to determine the |
| image type and quality when exporting images to ODT files. |
| |
| - Text: |
| * [QTBUG-57479] Non-breaking spaces are now displayed as a degree symbol |
| when QTextOption::ShowTabsAndSpaces is used. |
| * [QTBUG-69085] Fixed position of text cursor set by clicking outside |
| the bounds of a text line that ends with a surrogate pair or ligature. |
| * [QTBUG-70293] Fixed a crash that can happen when calling a setter on a |
| QTextCursor after its QTextDocument has been deleted. |
| |
| **************************************************************************** |
| * QtNetwork * |
| **************************************************************************** |
| |
| - Added DTLS over UDP support. |
| |
| - QPasswordDigestor: |
| * [QTBUG-30550] Added QPasswordDigestor |
| |
| - QSslKey: |
| * [QTBUG-17718] The OpenSSL backend can now load encrypted PKCS#8 |
| DER-encoded keys. |
| * [QTBUG-59068] Added support for PKCS#8-encoded keys in the generic SSL |
| back-end (used for SecureTransport on macOS and for WinRT). Note that |
| it does not support keys encrypted with a PKCS#12 algorithm. |
| |
| - QSslSocket: |
| * Enabled ALPN (and thus HTTP/2 negotiation) in SecureTransport backend |
| (macOS). |
| * [QTBUG-69420] Implemented renegotiation for SecureTransport backend. |
| |
| - SSL: |
| * The OpenSSL 1.1 backend also works with OpenSSL 1.1.1 (and thus can |
| negotiate TLS 1.3). |
| * [QTBUG-68156] OpenSSL >= 1.0 is now required to build Qt with OpenSSL |
| support. |
| |
| **************************************************************************** |
| * QtSql * |
| **************************************************************************** |
| |
| - MySQL: |
| * Now supports MySQL versions >= 8.0.1. |
| * [QTBUG-57028] The TIME data type is now treated like a string-based |
| type in order to respect the full range of the TIME data type. |
| |
| **************************************************************************** |
| * QtTest * |
| **************************************************************************** |
| |
| - QCOMPARE: |
| * Now outputs contents of std::tuple on failure. |
| * [QTBUG-65845] QtTest now prints values of QFlags that failed to compare. |
| |
| **************************************************************************** |
| * QtWidgets * |
| **************************************************************************** |
| |
| - Itemviews: |
| * [QTBUG-12129][QTBUG-14949][QTBUG-57891] Fixed eliding of multi-line |
| items. |
| |
| - QAbstractSpinBox: |
| * [QTBUG-67380] The Qt::ControlModifier now increases the number of steps a |
| QAbstractSpinBox takes for the following interactions: scrolling, up/down |
| keyboard keys and the spin box buttons. Previously, Qt::ControlModifier |
| only affected scrolling. |
| |
| - QApplication: |
| * [QTBUG-67736] QApplication no longer sends a mouse move event to the |
| entered widget if it sends synthetic enter and leave events. |
| |
| - QHeaderView: |
| * [QTBUG-23203] Padding/margin is now taken into account when the text gets |
| elided. |
| * [QTBUG-59501] The qss padding attribute is now honored in all cases. |
| * [QTBUG-62091] The size of the decoration is now taken into account in |
| paintSection(). |
| * [QTBUG-65017] The drag'n'drop indicator is now using the correct font. |
| * [QTBUG-69431] setDefaultSectionSize() now checks if the given value is |
| inside min/max section size. |
| * [QTBUG-70084] The section indicator is now high-DPI-aware. |
| |
| - QItemDelegate: |
| * [QTBUG-16134] Fixed text height calculation when the item has a |
| decoration or checkbox. |
| |
| - QLineEdit: |
| * [QTBUG-44046] The textEdited() signal is now emitted even if the |
| QValidator has changed the user input. |
| * [QTBUG-57448] Added inputRejected() signal for when a key press is not |
| accepted by the QLineEdit. For instance, when an invalid key is |
| pressed for a validator set. |
| |
| - QListView: |
| * [QTBUG-27110] The pseudo states :first/:middle/:last are now respected. |
| * [QTBUG-56606] Added itemAlignment property. |
| * [QTBUG-67440] Fixed a bug that caused items on internal move to be |
| deleted. |
| |
| - QMenu: |
| * [QTBUG-69199] Removed icon highlight when a stylesheet was applied by |
| the application. |
| |
| - QMessageBox: |
| * [QTBUG-35545] On Android and iOS it's now possible to show a |
| QMessageBox with custom buttons as a native dialog. |
| |
| - QSpinBox/QDoubleSpinBox: |
| * Added an option for adaptive decimal step size. |
| |
| - QSplashScreen: |
| * [QTBUG-43081] The alignment when the message is passed as HTML is now |
| correctly honored. |
| |
| - QStyle: |
| * QStyle::SH_SpinBox_StepModifier allows the developer to pick which |
| keyboard modifier increases the number of steps a QAbstractSpinBox |
| takes for the following interactions: scrolling, up/down keyboard keys |
| and the spin box buttons. The Qt::ShiftModifier can now be used, or |
| the feature can be disabled using Qt::NoModifier. Previously, only |
| Qt::ControlModifier could be used as the modifier. |
| |
| - QTabBar: |
| * [QTBUG-18146] Fixed mixed up CSS pseudo class for left and right. |
| |
| - QTableView: |
| * [QTBUG-48244][QTBUG-49548] Fixed calculating geometries for editors. |
| * [QTBUG-70215] Fixed PageUp not getting to top when first row is hidden. |
| |
| - QTableWidget: |
| * Fixed handling of Qt::EditRole and Qt::DisplayRole in setItemData(). |
| |
| - QTreeView: |
| * [QTBUG-39486] Sped up expanding items when pressing asterisk. |
| |
| - QWidget: |
| * [QTBUG-68393][QTBUG-69619][QTBUG-10907] Fixed several bugs that |
| incorrectly reordered tabs for compound widgets under some special |
| circumstances. |
| * [QTBUG-65199] enterEvent() and leaveEvent() now occur when a hovering |
| drawing tablet stylus enters or leaves a widget. |
| * Added the Qt::WA_StyleSheetTarget attribute to indicate that a widget |
| was affected by a style sheet. |
| |
| **************************************************************************** |
| * Android * |
| **************************************************************************** |
| |
| - Added Android edit context menu. |
| - Removed old debugging bridge. To be able to debug Qt on Android apps the |
| user must use QtCreator 4.6.1+. |
| - [QTBUG-63735] The system no longer restarts the application when the user |
| replaces SIM card or changes the logical density of the screen. |
| - [QTBUG-70280] ARM64 builds now default to android-21 instead of failing. |
| - [QTBUG-35545] QMessageBox now supports buttons with custom labels. |
| |
| **************************************************************************** |
| * Linux * |
| **************************************************************************** |
| |
| - QFileDialog will use the native dialogs provided by the platform theme |
| instead of trying to use Flatpak portal to select directories. |
| |
| **************************************************************************** |
| * macOS * |
| **************************************************************************** |
| |
| - QtGui: |
| * [QTBUG-63800] Fixed display of condensed fonts when NoFontMerging is |
| in use. |
| |
| - Text: |
| * [QTBUG-69955] Fixed font weights on macOS 10.14. |
| |
| **************************************************************************** |
| * Windows * |
| **************************************************************************** |
| |
| - [QTBUG-55762] The dimensions of invisible margins inside the frames of |
| Windows 10 windows will now be disregarded in the positioning of Qt |
| windows to avoid a misplaced look (offset by a few pixels from the |
| expected position). |
| - [QTBUG-44964][QTBUG-60437] The application attributes |
| AA_CompressTabletEvents and AA_CompressHighFrequencyEvents are now |
| supported on Windows 8 and above for touch/pen input, with the same |
| defaults as on X11 (compress touch events, don't compress tablet events) |
| |
| - QTimeZone: |
| * [QTBUG-42021] Changed MS-Win to use ICU for time-zone data, when |
| available, in preference to MS's TZ APIs. The choice is made when |
| building Qt. This will give reliable results when non-DST transitions |
| arise, or when a zone's DST is not simple (e.g. interrupted by |
| Ramadan). |
| |
| **************************************************************************** |
| * winrt * |
| **************************************************************************** |
| |
| - Added support to Windows UI Automation to the WinRT QPA, allowing |
| Qt-based UWP applications to operate with accessibility and |
| programmatic UI control tools. |
| |
| **************************************************************************** |
| * X11 * |
| **************************************************************************** |
| |
| - [QTBUG-39624] The xcb plugin was ported to use libxcb-xinput instead of |
| libXi for XInput2 support. The -xinput2 configure option was replaced by |
| -xcb-xinput. |
