1 Some of the changes listed in this file include issue tracking numbers
2 corresponding to tasks in the Qt Bug Tracker:
4 http://bugreports.qt-project.org/
6 Each of these identifiers can be entered in the bug tracker to obtain more
7 information about a particular change.
10 ****************************************************************************
11 * Source incompatible changes *
12 ****************************************************************************
16 * The signatures of the connectNotify() and disconnectNotify() functions
17 have changed. The functions now get passed a QMetaMethod that identifies
18 the signal, rather than a const char *.
20 - QSslCertificate::subjectInfo() and QSslCertificate::issuerInfo() now
21 return a QStringList instead of a QString
23 - QSslCertificate::isValid() has been deprecated. Originally it only checked
24 the certificate dates, but later checking for blacklisting was added. Now
25 there's a more specific QSslCertificate::isBlacklisted() method.
27 - Unite clipping support has been removed from QPainter. The alternative is
28 to unite QRegion's and using the result on QPainter.
30 - QLibrary::resolve() now returns a function pointer instead of a void
33 - QSslCertificate::alternateSubjectNames() is deprecated (but can be enabled
34 via QT_DISABLE_DEPRECATED_BEFORE), use
35 QSslCertificate::subjectAlternativeNames() instead.
37 - QLibraryInfo::buildKey() has been removed. Likewise, the QT_BUILD_KEY
38 preprocessor #define has also been removed. The build-key is obsolete
39 and is no longer necessary.
41 - QCoreApplication::translate() will no longer return the source text when
42 the translation is empty. Use lrelease -removeidentical for optimization.
44 - QString and QByteArray constructors that take a size argument will now treat
45 negative sizes to indicate nul-terminated strings (a nul-terminated array of
46 QChar, in the case of QString). In Qt 4, negative sizes were ignored and
47 result in empty QString and QByteArray, respectively. The size argument to
48 those constructors now has a default value of -1, thus replacing the separate
49 constructors that did the same.
51 - Qt::escape() is deprecated (but can be enabled via
52 QT_DISABLE_DEPRECATED_BEFORE), use QString::toHtmlEscaped() instead.
54 - QBool is gone. QString::contains, QByteArray::contains, and QList::contains
55 used to return an internal QBool class so that the Qt3 code
56 "if (a.contains() == 2)" wouldn't compile anymore. Such code cannot exist
57 in Qt4, so these methods return a bool now. If your code used the undocumented
58 QBool, simply replace it with bool.
60 - qIsDetached<> has been removed without replacement.
63 * QMetaType::construct() has been renamed to QMetaType::create().
64 * QMetaType::unregisterType() has been removed.
65 * QMetaType now records if the type argument inherits QObject. This
66 can be used in scripting APIs, so that custom QObject subclasses
67 are treated as QObject pointers. In QtScript for example, this can
68 mean that QScriptValue.isQObject can be true where it was false before.
69 * QMetaType::QWidgetStar has been removed. Use qMetaTypeId<QWidget*>()
70 or QVariant::canConvert<QWidget*>() as appropriate.
73 * QMetaMethod::signature() has been renamed to QMetaMethod::methodSignature(),
74 and the return type has been changed to QByteArray. This was done to be able
75 to generate the signature string on demand, rather than always storing it in
77 * QMetaMethod::typeName() no longer returns an empty string when the return
78 type is void; it returns "void". The recommended way of checking whether a
79 method returns void is to compare the return value of QMetaMethod::returnType()
83 * Inconsistent constructor taking Qt::GlobalColor and producing QVariant(QColor)
84 instance was removed. Code constructing such variants can be migrated by
85 explicitly calling QColor constructor. For example from "QVariant(Qt::red)"
86 to "QVariant(QColor(Qt::red))"
89 * The plain-text, xml and lightxml test output formats have been changed to
90 show a test result for every row of test data in data-driven tests. In
91 Qt4, only fails and skips were shown for individual data rows and passes
92 were not shown for individual data rows, preventing accurate calculation
93 of test run rates and pass rates.
94 * The QTRY_VERIFY and QTRY_COMPARE macros have been moved into QTestLib.
95 These macros formerly lived in tests/shared/util.h but are now provided
96 by including the <QtTest/QtTest> header. In addition,
97 QTRY_VERIFY_WITH_TIMEOUT and QTRY_COMPARE_WITH_TIMEOUT are provided,
98 allowing for specifying custom timeout values.
99 * The QTEST_NOOP_MAIN macro has been removed from the API. If a test is
100 known at compile-time to be inapplicable for a particular build it should
101 be omitted via .pro file logic, or the test should call QSKIP in the
102 initTestCase() method to skip the entire test and report a meaningful
103 explanation in the test log.
104 * The DEPENDS_ON macro has been removed from the API. This macro did nothing
105 and misled some users to believe that they could make test functions depend
106 on each other or impose an execution order on test functions.
107 * The QTest::qt_snprintf function has been removed from the API. This was an
108 internal testlib function that was exposed in the public API due to its use
109 in a public macro. Any calls to this function should be replaced by a call
110 to qsnprintf(), which comes from the <QtCore/QByteArray> header.
111 * The QTest::pixmapsAreEqual() function has been removed from the API.
112 Comparison of QPixmap objects should be done using QCOMPARE, which provides
113 more informative output in the event of a failure.
114 * The QSKIP macro no longer has the "mode" parameter, which caused problems
115 for calculating test metrics, as the SkipAll mode hid information about
116 what test data was skipped. Calling QSKIP in a test function now behaves
117 like SkipSingle -- skipping a non-data-driven test function or skipping
118 only the current data row of a data-driven test function. Every skipped
119 data row is now reported in the test log.
121 - The QSsl::TlsV1 enum value was renamed to QSsl::TlsV1_0 .
124 * Internal QAccessible::State enum value HasInvokeExtension removed
125 - QAccessibleInterface:
126 * The "child" integer parameters have been removed. This moves the api
127 to be closer to IAccessible2.
128 This means several functions lose their integer parameter:
129 text(Text t, int child) -> text(Text t), rect(int child) -> rect()
130 setText(Text t, int child, const QString &text) -> setText(Text t, const QString &text)
131 role(int child) -> role(), state(int child) -> state()
132 * parent() and child() was added in order to do hierarchical navigation.
133 * relations() was added as a replacement to relationTo()
134 * As a consequence of the above two points, navigate() was removed.
135 * Accessible-Action related functions have been removed. QAccessibleInterface
136 subclasses are expected to implement the QAccessibleActionInterface instead.
137 These functions have been removed:
138 QAccessibleInterface::userActionCount, QAccessibleInterface::actionText,
139 QAccessibleInterface::doAction
140 - QAccessibleEvent also loses the child parameter.
141 QAccessibleEvent(Type type, int child) -> QAccessibleEvent(Type type)
142 QAccessibleEvent::child() removed.
143 - QAccessibleActionInterface:
144 * Refactored to be based on action names. All functions have been changed from using
145 int parameters to strings.
147 - QSound has been moved from QtGui to QtMultimedia
149 - QTabletEvent::QTabletEvent does not take a hiResGlobalPos argument anymore,
150 as all coordinates are floating point based now.
154 * The DeviceType enum and deviceType() have been deprecated due to
155 the introduction of QTouchDevice.
157 * The signature of the constructor has changed. It now takes a
158 QTouchDevice pointer instead of just a DeviceType value.
160 * TouchPointState no longer includes TouchPointStateMask and
161 TouchPointPrimary. QTouchEvent::TouchPoint::isPrimary() has
164 * QWidget *widget() has been removed and is replaced by QObject
165 *target() in order to avoid QWidget dependencies.
167 * QEvent::TouchCancel has been introduced. On systems where it makes
168 sense this event type can be used to differentiate between a
169 regular TouchEnd and abrupt touch sequence cancellations caused by
170 the compositor, for example when a system gesture gets recognized.
174 * Q_DECLARE_METATYPE(Foo*) now requires that Foo is fully defined. In
175 cases where a forward declared type should be used as a metatype,
176 Q_DECLARE_OPAQUE_POINTER(Foo*) can be used to allow that.
177 * Similarly, Q_DECLARE_METATYPE(QSharedPointer<Foo>), and
178 Q_DECLARE_METATYPE(QWeakPointer<Foo>) require Foo to be fully defined. Again
179 though, Q_DECLARE_OPAQUE_POINTER(Foo*) can be used to allow that.
183 * The signature of the createEditor and valuePropertyName methods
184 have been changed to take arguments of type int instead of QVariant::Type.
186 - QWindowSystemInterface:
188 * The signature of all handleTouchEvent() variants have changed,
189 taking a QTouchDevice* instead of just a DeviceType value.
190 Platform or generic plug-ins have to create and register at least
191 one QTouchDevice before sending the first touch event.
193 * The event type parameter is removed from handleTouchEvent().
195 - The previously exported function qt_translateRawTouchEvent() has been removed.
196 Use QWindowSystemInterface::handleTouchEvent() instead.
198 - QAbstractEventDispatcher
200 * The signature for the pure-virtual registerTimer() has changed. Subclasses
201 of QAbstractEventDispatcher will need to be updated to reimplement the new
202 pure-virtual 'virtual void registerTimer(int timerId, int interval,
203 Qt::TimerType timerType, QObject *object) = 0;'
205 * QAbstractEventDispatcher::TimerInfo is no longer a QPair<int, int>. It is
206 now a struct with 3 members: struct TimerInfo { int timerId; int interval;
207 Qt::TimerType timerType; }; Reimplementations of
208 QAbstractEventDispatcher::registeredTimers() will need to be updated to pass
209 3 arguments to the TimerInfo constructor (instead of 2).
213 * Removed implicit conversion operator QUuid::operator QString(), instead
214 QUuid::toString() function should be used.
216 - The QHttp, QHttpHeader, QHttpResponseHeader and QHttpRequestHeader classes have
217 been removed, QNetworkAccessManager should be used instead.
219 - The QFtp and QUrlInfo classes are no longer exported, QNetworkAccessManager should be used
220 instead. These classes are available in a separate module, qtftp.
224 * On Windows, QProcess::ForwardedChannels will not forward the output of GUI
225 applications anymore, if they do not create a console.
227 - QAbstractSocket's connectToHost() and disconnectFromHost() are now virtual and
228 connectToHostImplementation() and disconnectFromHostImplementation() don't exist.
230 - QTcpServer::incomingConnection() now takes a qintptr instead of an int.
232 - QNetworkConfiguration::bearerName() removed, and bearerTypeName() should be used.
234 - QDir::convertSeparators() (deprecated since Qt 4.2) has been removed. Use
235 QDir::toNativeSeparators() instead.
237 - QIconEngineV2 was merged into QIconEngine
238 You might need to adjust your code if it used a QIconEngine.
241 * Projects which explicitly set an empty TARGET are considered broken now.
242 * The makespec and .qmake.cache do not see build pass specific variables any more.
243 * load()/include() with a target namespace and infile()/$$fromfile() now start with
244 an entirely pristine context.
245 * Configure's -sysroot and -hostprefix are now handled slightly differently.
246 The QT_INSTALL_... properties are now automatically prefixed with the sysroot;
247 the raw values are available as QT_INSTALL_.../raw and the sysroot as QT_SYSROOT.
248 The new QT_HOST_... properties can be used to refer to the Qt host tools.
249 * Several functions and built-in variables were modified to return normalized paths.
250 * The -(no-)exception flags in configure have been removed. Qt modules are now compiled
251 without exceptions by default, as they do not use them and can neither handle them
252 properly. Qt Core still has exceptions enabled to correctly throw bad_alloc exceptions
254 Whether code should be compiled with exception support enabled or disabled can be
255 controlled by a CONFIG += exceptions/exceptions_off setting in the .pro file.
257 - QTextCodecPlugin has been removed since it is no longer used. All text codecs
258 are now built into QtCore.
260 - QDir::NoDotAndDotDot is QDir::NoDot|QDir::NoDotDot therefore there is no need
261 to use or check both.
263 - QFSFileEngine, QAbstractFileEngine, QAbstractFileEngineIterator and
264 QAbstractFileEngineHandler were removed from public API and are no longer
265 exported. They may temporarily live as private implementation details, but
266 they may be altogether dropped or otherwise changed at will in the future.
269 * toShort(), toUShort(), toInt(), toUInt(), toLongLong() and toULongLong() no
270 longer take a parameter for base, they will only perform localised base 10
271 conversions. For converting other bases use the QString methods instead.
273 - QSystemLocale has been removed from the public API.
275 - QSqlQueryModel::indexInQuery() is now virtual. See note below under QtSql.
277 - QSqlDriver::subscribeToNotification, unsubscribeFromNotification,
278 subscribedToNotifications, isIdentifierEscaped, and stripDelimiters
279 are now virtual. See note below under QtSql.
281 - qMacVersion() has been removed. Use QSysInfo::macVersion() or
282 QSysInfo::MacintoshVersion instead.
284 - QColorDialog::customColor() now returns a QColor value instead of QRgb.
285 QColorDialog::setCustomColor() and QColorDialog::setStandardColor() now
286 take a QColor value for their second parameter instead of QRgb.
288 - QPageSetupDialog has had the PageSetupDialogOption enum and the api to
289 set and get the enum removed as none of the Options are used any more.
291 ****************************************************************************
293 ****************************************************************************
298 - The directory structure of the qtbase unit-tests has been reworked to
299 more closely match the directory structure of the code under test.
300 Integration tests have been moved to tests/auto/integrationtests.
302 - Qt is compiled with C++11 support enabled by default, provided the compiler
303 supports C++11. Qmake based projects can enable C++11 support explicitly
304 using 'CONFIG+=c++11' in their .pro files. To enable it conditionally, use
305 'contains(QT_CONFIG,c++11):CONFIG+=c++11'. This will enable C++11 support
306 only if Qt was built with C++11 support.
308 Third party components
309 ----------------------
311 - SQLITE_ENABLE_FTS3,SQLITE_ENABLE_FTS3_PARENTHESIS and SQLITE_ENABLE_RTREE
312 flags are now enabled by default on all platforms, for the sqlite3 copy under
313 the 3rdparty directory.
316 ****************************************************************************
318 ****************************************************************************
322 * drop a bogus QChar::NoCategory enum value; the proper QChar::Other_NotAssigned
323 value is returned for an unassigned codepoints now.
325 * layoutAboutToBeChanged is no longer emitted by QAbstractItemModel::beginMoveRows.
326 layoutChanged is no longer emitted by QAbstractItemModel::endMoveRows. Proxy models
327 should now also connect to (and disconnect from) the rowsAboutToBeMoved and
330 * The default value of the property QSortFilterProxyModel::dynamicSortFilter was
331 changed from false to true.
333 * The signature of the virtual QAbstractItemView::dataChanged method has changed to
334 include the roles which have changed. The signature is consistent with the dataChanged
337 * QFileSystemWatcher is now able to return failure in case of errors whilst
338 altering the watchlist in both the singular and QStringList overloads of
339 addPath and removePath.
341 * QString::mid, QString::midRef and QByteArray::mid, if the position passed
342 is equal to the length (that is, right after the last character/byte),
343 now return an empty QString, QStringRef or QByteArray respectively.
344 in Qt 4 they returned a null QString or a null QStringRef.
346 * QString methods toLongLong(), toULongLong(), toLong(), toULong(), toInt(),
347 toUInt(), toShort(), toUShort(), toDouble(), and toFloat() no longer use the
348 default or system locale, they will always use the C locale. This is to
349 guarantee consistent default conversion of strings. For locale-aware conversions
350 use the equivalent QLocale methods.
352 * QDate, QTime, and QDateTime have undergone important behavioural changes:
353 * QDate only implements the Gregorian calendar, the switch to the Julian
354 calendar before 1582 has been removed. This means all QDate methods will
355 return different results for dates prior to 15 October 1582, and there is
356 no longer a gap between 4 October 1582 and 15 October 1582.
357 * QDate::setYMD() is deprecated, use QDate::setDate() instead
358 * Most methods now apply strict validity checks and will return appropriate
359 and consistent values when invalid. For example, QDate::year() will return
360 0 and QDate::shortMonthName() will return QString().
361 * Adding days to a null QDate or seconds to a null QTime will no longer return
363 * QDate stores the Julian Day as a qint64 extending date support across a
364 more interesting range, see the class documentation for details.
365 * Conversion to YMD form dates is only accurate between to 4800 BCE to
367 * The QDate::addDays() and QDateTime::addDays() methods now take a qint64
368 * The QDate::daysTo() and QDateTime::daysTo() methods now return a qint64
370 * QTextCodec::codecForCStrings() and QTextCodec::setCodecForCStrings() have both
371 been removed. This was removed due to issues with breaking other code from
372 libraries, creating uncertainty/bugs in using QString easily, and (to a lesser
373 extent) performance issues.
375 * QTextCodec::codecForTr() and QTextCodec::setCodecForTr() have been removed.
376 QObject::trUtf8 and QCoreApplication::Encoding enum are now obsolete. Qt assumes
377 that the source code is encoded in UTF-8.
379 * QFile::setEncodingFunction and QFile::setDecodingFunction are obsolete and do
380 nothing in Qt 5. The QFile::encodeName and QFile::decodeName functions are now
381 hardcoded to operate on QString::fromLocal8Bit and QString::toLocal8Bit
382 only. Therefore, it's still possible to obtain the old behaviour by calling
383 QTextCodec::setCodecForLocale. However, that is not recommended: new code
384 should not make assumptions about the filesystem encoding and older code should
385 have those assumptions removed.
387 * QIntValidator and QDoubleValidator no longer fall back to using the C locale if
388 the requested locale fails to validate the input.
390 * A new set of classes for doing pattern matching with Perl-compatible regular
391 expressions has been added: QRegularExpression, QRegularExpressionMatch and
392 QRegularExpressionMatchIterator. They aim to replace QRegExp with a more
393 powerful and flexible regular expression engine.
395 * QEvent::AccessibilityPrepare, AccessibilityHelp and AccessibilityDescription removed:
396 * The enum values simply didn't make sense in the first place and should simply be dropped.
398 * Filtering of native events (QCoreApplication::setEventFilter, as well as
399 QApplication::x11EventFilter/macEventFilter/qwsEventFilter/winEventFilter) have been replaced
400 with QCoreApplication::installNativeEventFilter and removeNativeEventFilter,
401 for an API much closer to QEvent filtering. Note that the native events that can be
402 filtered this way depend on which QPA backend is chosen, at runtime. On X11, XEvents are
403 not used anymore, and have been replaced with xcb_generic_event_t due to the switch to
404 XCB, which requires porting the application code to XCB as well.
406 * [QTBUG-23529] QHash is now more resilient to a family of denial of service
407 attacks exploiting algorithmic complexity, by supporting two-arguments overloads
408 of the qHash() hashing function.
410 * [QTBUG-4844] QObject::disconnectNotify() is now called when a receiver is destroyed.
413 - [QTBUG-15430] Added a QStateMachine constructor that takes a ChildMode parameter.
414 - [QTBUG-17975] Delayed event posting now works from secondary threads.
415 - [QTBUG-19789] Signal transitions now work correctly when the sender is in a different thread.
416 - [QTBUG-20362] Property assignments now work as expected with nested, parallel states.
417 - [QTBUG-22931] The root state can now be a parallel state group.
418 - [QTBUG-24307] The initial state is now entered before the started() signal is emitted.
419 - [QTBUG-25959] State entry and exit order is now SCXML spec-compliant.
423 * Accessibility has been refactored. The hierachy of accessible objects is implemented via
424 proper parent/child functions instead of using navigate which has been deprecated for this purpose.
425 Table and cell interfaces have been added to qaccessible2.h
427 * Touch events and points have been extended to hold additional
428 information like capability flags, point-specific flags, velocity,
431 * A new set of enabler classes have been added, most importantly QWindow, QScreen,
432 QSurfaceFormat, and QOpenGLContext.
434 * Most of the useful QtOpenGL classes have been polished and moved into
435 QtGui. See QOpenGLFramebufferObject, QOpenGLShaderProgram,
436 QOpenGLFunctions, etc.
438 * QOpenGLPaintDevice has been added to be able to use QPainter to render into
439 the currently bound context.
443 * QInputContext removed as well as related getters and setters on QWidget and QApplication.
444 Input contexts are now platform specific.
446 * QInputDialog::getInteger() has been obsoleted. Use QInputDialog::getInt() instead.
448 * In Qt 4, many QStyleOption subclasses were introduced in order to keep
449 binary compatibility -- QStyleOption was designed to be extended this way,
450 in fact it embeds a version number. In Qt 5 the various QStyleOption*V{2,3,4}
451 classes have been removed, and their members merged into the respective
452 base classes. Those classes were left as typedefs to keep existing code
453 working. Still, some minor adjustements could be necessary, especially in code
454 that uses QStyleOption directly and does not initialize all the members using
455 the proper Qt API: due to the version bump, QStyle will try to use the additional
456 QStyleOption members, which are left default-initialized.
458 * QHeaderView - The following functions have been obsoleted.
460 * void setMovable(bool movable) - use void setSectionsMovable(bool movable) instead.
462 * bool isMovable() const - use bool sectionsMovable() const instead.
464 * void setClickable(bool clickable) - use void setSectionsClickable(bool clickable) instead.
466 * bool isClickable() const - use bool sectionsClickable() instead.
468 * void setResizeMode(int logicalindex, ResizeMode mode) -
469 use setSectionResizeMode(logicalindex, mode) instead.
471 * ResizeMode resizeMode(int logicalindex) const -
472 use sectionResizeMode(int logicalindex) instead.
474 * QDateEdit and QTimeEdit have re-gained a USER property. These were originally removed
475 before Qt 4.7.0, and are re-added for 5.0. This means that the userProperty for
476 those classes are now QDate and QTime respectively, not QDateTime as they have been
477 for the 4.7 and 4.8 releases.
479 * QGraphicsItem and derived classes - Passing a QGraphicsScene in the items constructor
480 is no longer supported. Construct the item without a scene and then call
481 QGraphicsScene::addItem() to add the item to the scene.
483 * QAbstractItemView and derived classes only emit the clicked() signal on left click now,
484 instead of on all mouse clicks.
486 * QProxyModel has been removed. It is deprecated since early Qt 4 versions and replaced
487 by QAbstractProxyModel and related classes. A copy of QProxyModel is available
488 in the UiHelpers library.
492 * QHostAddress::isLoopback() API added. Returns true if the address is
493 one of the IP loopback addresses.
495 * QSslCertificate::serialNumber() now always returns the serial number in
498 * The openssl network backend now reads the ssl configuration file allowing
499 the use of openssl engines.
503 * QtDBus now generates property annotations for the Qt type names
504 in the org.qtproject.QtDBus namespace. When parsing such annotations
505 both the old and new namespaces are accepted.
507 * QtDBus error codes have been updated to be on the org.qtproject.QtDBus.Error
513 * Most of the classes in this module (with the notable exception of QGLWidget)
514 now have equivalents in QtGui, along with the naming change QGL -> QOpenGL.
515 The classes in QtOpenGL that have equivalents in QtGui can now be considered
520 * [QTBUG-2124] Added default conversion for long and unsigned long.
521 * [QTBUG-6133] Fixed QScriptContextInfo::functionMetaIndex() for overloaded
523 * [QTBUG-15213] Doc: Added missing properties to the ECMAScript reference.
524 * [QTBUG-15956] Doc: Removed wrong information about Error .stack properties.
525 * [QTBUG-17915] Fixed a crash when a JS property descriptor was only partially
527 * [QTBUG-18188] Fixed a regression that caused contexts created by
528 QScriptEngine::pushContext() to inherit the parent context's scope.
529 * [QTBUG-18201] Suppressed 'LEAK' messages on stderr at application exit.
530 * [QTBUG-20378] Fixed QtScriptTools compilation when some features are disabled.
531 * [QTBUG-20845] Fixed a precision bug in the calculator example.
532 * [QTBUG-21548] Fixed a crash in QScriptEngineDebugger when the QScriptEngine
533 being debugged was deleted.
534 * [QTBUG-21760] Fixed a crash when accessing QObject properties through an
536 * [QTBUG-21896] Fixed a crash when converting an invalid JS value to a string.
537 * [QTBUG-21993] Fixed a bug that caused QObject wrapper objects created with
538 the PreferExistingWrapperObject option to not be garbage collected, even if
539 the object was not referenced anywhere in the scripting environment.
540 * [QTBUG-22152] Fixed build issue on Solaris.
541 * [QTBUG-23871] Fixed a JIT crash on x86-64 caused by out-of-range branch
543 * [QTBUG-26261] Fixed a crash when a queued signal handler no longer existed.
544 * [QTBUG-26590] Fixed a bug that caused QObjects with script connections to
545 not be garbage collected as expected.
549 * [QTBUG-20615] Autotests can now log test output to multiple destinations
550 and log formats simultaneously.
551 * [QTBUG-21645] QSignalSpy now handles QVariant signal parameters more
552 intuitively; the QVariant value is copied directly, instead of being
553 wrapped inside a new QVariant. This means that calling
554 qvariant_cast<QVariant>() on the QSignalSpy item (to "unwrap" the value)
555 is no longer required (but still works).
559 QSqlQueryModel/QSqlTableModel/QSqlRelationalTableModel
561 * The dataChanged() signal is now emitted for changes made to an inserted
562 record that has not yet been committed. Previously, dataChanged() was
563 suppressed in this case for OnRowChange and OnFieldChange. This was probably
564 an attempt to avoid trouble if setData() was called while handling
565 primeInsert(). By emitting dataChanged(), we ensure that all views are aware
568 * While handling primeInsert() signal, the record must be manipulated using
569 the provided reference. Do not attempt to manipulate the records using the
570 model methods setData() or setRecord().
572 * removeRows() no longer emits extra beforeDelete signal for out of range row.
574 * removeRows() now requires the whole range of targetted rows to be valid
575 before doing anything. Previously, it would remove what it could and
576 ignore the rest of the range.
578 * removeRows(), for OnFieldChange and OnRowChange, allows only 1 row to be
579 removed and only if there are no other changed rows.
581 * setRecord() and insertRecord()
582 -The generated flags from the source record are preserved in the model
583 and determine which fields are included when changes are applied to
585 -Require all fields to map correctly. Previously fields that didn't
586 map were simply ignored.
587 -For OnManualSubmit, insertRecord() no longer leaves behind an empty
588 row if setRecord() fails.
589 -setRecord() now automatically submits for OnRowChange.
591 * QSqlQueryModel::indexInQuery() is now virtual. See
592 QSqlTableModel::indexInQuery() as example of how to implement in a
595 * QSqlQueryMode::setQuery() emits fewer signals. The modelAboutToBeReset()
596 and modelReset() signals suffice to inform views that they must reinterrogate
599 * QSqlTableModel::selectRow(): This is a new method that refreshes a single
600 row in the model from the database.
602 * QSqlTableModel edit strategies OnFieldChange/OnRowChange QTBUG-2875
603 Previously, after changes were submitted in these edit strategies, select()
604 was called which removed and inserted all rows. This ruined navigation
605 in QTableView. Now, with these edit strategies, there is no implicit select()
606 done after committing. This includes deleted rows which remain in
607 the model as blank rows until the application calls select(). Instead,
608 selectRow() is called to refresh only the affected row.
610 * QSqlTableModel::isDirty(): New overloaded method to check whether model
611 has any changes to submit. QTBUG-3108
613 * QSqlTableModel::setData() and setRecord() no longer revert pending changes
614 that fail upon resubmitting for edit strategies OnFieldChange and OnRowChange.
615 Instead, pending (failed) changes cause new changes inappropriate to the
616 edit strategy to be refused. The application should resolve or revert pending
617 changes. insertRows() and insertRecord() also respect the edit strategy.
619 * QSqlTableModel::setData() and setRecord() in OnRowChange no longer have the
620 side effect of submitting the cached row when invoked on a different row.
622 * QSqlDriver::subscribeToNotification, unsubscribeFromNotification,
623 subscribedToNotifications, isIdentifierEscaped, and stripDelimiters
624 are now virtual. Their xxxImplemenation counterparts have been removed
625 now that QSqlDriver subclasses can reimplement these directly.
627 ****************************************************************************
629 ****************************************************************************
633 * QVariant::Bool type now mapped to integers 0/1 in SQL instead of strings
634 'true' and 'false'. Sqlite does not have a boolean column type and it is
635 customary to use integer. QTBUG-23895
639 * the error message returned in QSqlError::text() has the SQLSTATE error code
640 appended in parantheses.
642 ****************************************************************************
643 * Platform Specific Changes *
644 ****************************************************************************
652 * Accessibility framework uses IAccessible2
653 * ANGLE can be used to provide Open GL ES 2.0 (see http://code.google.com/p/angleproject/)
659 Qt for Embedded Linux
660 ---------------------
667 ****************************************************************************
668 * Compiler Specific Changes *
669 ****************************************************************************
672 ****************************************************************************
674 ****************************************************************************
678 * Remove qttest_p4.prf file. From now on we should explicitly enable the
679 things from it which we want. Autotest .pro files should stop using
680 'load(qttest_p4)' and start using 'CONFIG+=testcase' instead.
685 * [QTBUG-8926] [QTBUG-20440] Properties of type QStringList now have
686 translation attributes which apply to all items.
687 They are by default translatable.
696 * [QTBUG-20785] The moc now has a -b<file> option to #include an additional
697 file at the beginning of the generated file.
708 * QMAKE_MOC_OPTIONS variable is now available for passing additional parameters
714 * The Mac OS X -dwarf2 configure argument has been removed. DWARF2 is always
715 used on Mac OS X now.
720 ****************************************************************************
722 ****************************************************************************
723 - The text codecs that were previously plugins are now built into QtCore.
724 - Code using Q_EXPORT_PLUGIN macros will no longer compile. Use
725 Q_PLUGIN_METADATA instead. Note that this requires that the class
726 be default-constructible.
728 ****************************************************************************
729 * Important Behavior Changes *
730 ****************************************************************************
734 * The implementation of QPointer has been changed to use QWeakPointer. The
735 old guard mechanism has been removed. This causes a slight change
736 in behavior when using QPointer:
738 * When using QPointer on a QWidget (or a subclass of QWidget), previously
739 the QPointer would be cleared by the QWidget destructor. Now, the QPointer
740 is cleared by the QObject destructor (since this is when QWeakPointers are
741 cleared). Any QPointers tracking a widget will NOT be cleared before the
742 QWidget destructor destroys the children for the widget being tracked.
746 * QUrl has been changed to operate only on percent-encoded
747 forms. Fully-decoded forms, where the percent character stands for itself,
748 are no longer possible. For that reason, the getters and setters with
749 "encoded" in the name are deprecated, except for QUrl::toEncoded() and
752 QUrl now operates in a mode where it decodes as much as it can of the
753 percent-encoding sequences. In addition, the setter methods possess a mode
754 in which a '%' character not part of a percent-encoding sequence will cause
755 the parser to correct the input. Therefore, most software will not require
756 changes to adapt, since the getter methods will continue returning the
757 components in their most-decoded form as they did before and the setter
758 methods will accept input as they did before..
760 The most notable difference is when dealing with
761 QUrl::toString(). Previously, this function would return percent characters
762 in the URL by themselves. Now, it will return "%25", like
767 * Definition of QVariant::UserType changed. Currently it is the same as
768 QMetaType::User, which means that it points to the first registered custom
769 type, instead of a nonexistent type.
773 * Interpretation of QMetaType::Void was changed. Before, in some cases
774 it was returned as an invalid type id, but sometimes it was used as a valid
775 type (C++ "void"). In Qt5, new QMetaType::UnknownType was introduced to
776 distinguish between these two. QMetaType::UnknownType is an invalid type id
777 signaling that a type is unknown to QMetaType, and QMetaType::Void
778 is a valid type id of C++ void type. The difference will be visible for
779 example in call to QMetaType::typeName(), this function will return null for
780 QMetaType::UnknownType and a pointer to "void" string for
782 Please, notice that QMetaType::UnknownType has value 0, which previously was
783 reserved for QMetaType::Void.
788 * The static function QMessageBox::question has changed the default argument
789 for buttons. Before the default was to have an Ok button. That is changed
790 to having a yes and a no button.