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 ****************************************************************************
15 - QSslCertificate::subjectInfo() and QSslCertificate::issuerInfo() now
16 return a QStringList instead of a QString
18 - QSslCertificate::isValid() has been deprecated. Originally it only checked
19 the certificate dates, but later checking for blacklisting was added. Now
20 there's a more specific QSslCertificate::isBlacklisted() method.
22 - Unite clipping support has been removed from QPainter. The alternative is
23 to unite QRegion's and using the result on QPainter.
25 - QLibrary::resolve() now returns a function pointer instead of a void
28 - QSslCertificate::alternateSubjectNames() is deprecated (but can be enabled
29 via QT_DISABLE_DEPRECATED_BEFORE), use
30 QSslCertificate::subjectAlternativeNames() instead.
32 - QLibraryInfo::buildKey() has been removed. Likewise, the QT_BUILD_KEY
33 preprocessor #define has also been removed. The build-key is obsolete
34 and is no longer necessary.
36 - QCoreApplication::translate() will no longer return the source text when
37 the translation is empty. Use lrelease -removeidentical for optimization.
39 - QString and QByteArray constructors that take a size argument will now treat
40 negative sizes to indicate nul-terminated strings (a nul-terminated array of
41 QChar, in the case of QString). In Qt 4, negative sizes were ignored and
42 result in empty QString and QByteArray, respectively. The size argument to
43 those constructors now has a default value of -1, thus replacing the separate
44 constructors that did the same.
46 - Qt::escape() is deprecated (but can be enabled via
47 QT_DISABLE_DEPRECATED_BEFORE), use QString::toHtmlEscaped() instead.
49 - QBool is gone. QString::contains, QByteArray::contains, and QList::contains
50 used to return an internal QBool class so that the Qt3 code
51 "if (a.contains() == 2)" wouldn't compile anymore. Such code cannot exist
52 in Qt4, so these methods return a bool now. If your code used the undocumented
53 QBool, simply replace it with bool.
55 - qIsDetached<> has been removed without replacement.
58 * QMetaType::construct() has been renamed to QMetaType::create().
59 * QMetaType::unregisterType() has been removed.
61 - QMetaMethod::signature() has been renamed to QMetaMethod::methodSignature(),
62 and the return type has been changed to QByteArray. This was done to be able
63 to generate the signature string on demand, rather than always storing it in
67 * The plain-text, xml and lightxml test output formats have been changed to
68 show a test result for every row of test data in data-driven tests. In
69 Qt4, only fails and skips were shown for individual data rows and passes
70 were not shown for individual data rows, preventing accurate calculation
71 of test run rates and pass rates.
72 * The QTRY_VERIFY and QTRY_COMPARE macros have been moved into QTestLib.
73 These macros formerly lived in tests/shared/util.h but are now provided
74 by including the <QtTest/QtTest> header. In addition,
75 QTRY_VERIFY_WITH_TIMEOUT and QTRY_COMPARE_WITH_TIMEOUT are provided,
76 allowing for specifying custom timeout values.
77 * The QTEST_NOOP_MAIN macro has been removed from the API. If a test is
78 known at compile-time to be inapplicable for a particular build it should
79 be omitted via .pro file logic, or the test should call QSKIP in the
80 initTestCase() method to skip the entire test and report a meaningful
81 explanation in the test log.
82 * The DEPENDS_ON macro has been removed from the API. This macro did nothing
83 and misled some users to believe that they could make test functions depend
84 on each other or impose an execution order on test functions.
85 * The QTest::qt_snprintf function has been removed from the API. This was an
86 internal testlib function that was exposed in the public API due to its use
87 in a public macro. Any calls to this function should be replaced by a call
88 to qsnprintf(), which comes from the <QtCore/QByteArray> header.
89 * The QTest::pixmapsAreEqual() function has been removed from the API.
90 Comparison of QPixmap objects should be done using QCOMPARE, which provides
91 more informative output in the event of a failure.
92 * The QSKIP macro no longer has the "mode" parameter, which caused problems
93 for calculating test metrics, as the SkipAll mode hid information about
94 what test data was skipped. Calling QSKIP in a test function now behaves
95 like SkipSingle -- skipping a non-data-driven test function or skipping
96 only the current data row of a data-driven test function. Every skipped
97 data row is now reported in the test log.
99 - The QSsl::TlsV1 enum value was renamed to QSsl::TlsV1_0 .
102 * Internal QAccessible::State enum value HasInvokeExtension removed
103 - QAccessibleInterface:
104 * The "child" integer parameters have been removed. This moves the api
105 to be closer to IAccessible2.
106 This means several functions lose their integer parameter:
107 text(Text t, int child) -> text(Text t), rect(int child) -> rect()
108 setText(Text t, int child, const QString &text) -> setText(Text t, const QString &text)
109 role(int child) -> role(), state(int child) -> state()
110 * parent() and child() was added in order to do hierarchical navigation.
111 * relations() was added as a replacement to relationTo()
112 * As a consequence of the above two points, navigate() was removed.
113 * Accessible-Action related functions have been removed. QAccessibleInterface
114 subclasses are expected to implement the QAccessibleActionInterface instead.
115 These functions have been removed:
116 QAccessibleInterface::userActionCount, QAccessibleInterface::actionText,
117 QAccessibleInterface::doAction
118 - QAccessibleEvent also loses the child parameter.
119 QAccessibleEvent(Type type, int child) -> QAccessibleEvent(Type type)
120 QAccessibleEvent::child() removed.
121 - QAccessibleActionInterface:
122 * Refactored to be based on action names. All functions have been changed from using
123 int parameters to strings.
125 - QSound has been moved from QtGui to QtMultimedia
127 - QTabletEvent::QTabletEvent does not take a hiResGlobalPos argument anymore,
128 as all coordinates are floating point based now.
132 * The DeviceType enum and deviceType() have been deprecated due to
133 the introduction of QTouchDevice.
135 * The signature of the constructor has changed. It now takes a
136 QTouchDevice pointer instead of just a DeviceType value.
138 * TouchPointState no longer includes TouchPointStateMask and
139 TouchPointPrimary. QTouchEvent::TouchPoint::isPrimary() has
142 * QWidget *widget() has been removed and is replaced by QObject
143 *target() in order to avoid QWidget dependencies.
145 * QEvent::TouchCancel has been introduced. On systems where it makes
146 sense this event type can be used to differentiate between a
147 regular TouchEnd and abrupt touch sequence cancellations caused by
148 the compositor, for example when a system gesture gets recognized.
152 * Q_DECLARE_METATYPE(Foo*) now requires that Foo is fully defined. In
153 cases where a forward declared type should be used as a metatype,
154 Q_DECLARE_OPAQUE_POINTER(Foo*) can be used to allow that.
158 * The signature of the createEditor and valuePropertyName methods
159 have been changed to take arguments of type int instead of QVariant::Type.
161 - QWindowSystemInterface:
163 * The signature of all handleTouchEvent() variants have changed,
164 taking a QTouchDevice* instead of just a DeviceType value.
165 Platform or generic plug-ins have to create and register at least
166 one QTouchDevice before sending the first touch event.
168 * The event type parameter is removed from handleTouchEvent().
170 - The previously exported function qt_translateRawTouchEvent() has been removed.
171 Use QWindowSystemInterface::handleTouchEvent() instead.
173 - QAbstractEventDispatcher
175 * The signature for the pure-virtual registerTimer() has changed. Subclasses
176 of QAbstractEventDispatcher will need to be updated to reimplement the new
177 pure-virtual 'virtual void registerTimer(int timerId, int interval,
178 Qt::TimerType timerType, QObject *object) = 0;'
180 * QAbstractEventDispatcher::TimerInfo is no longer a QPair<int, int>. It is
181 now a struct with 3 members: struct TimerInfo { int timerId; int interval;
182 Qt::TimerType timerType; }; Reimplementations of
183 QAbstractEventDispatcher::registeredTimers() will need to be updated to pass
184 3 arguments to the TimerInfo constructor (instead of 2).
188 * Removed implicit conversion operator QUuid::operator QString(), instead
189 QUuid::toString() function should be used.
191 - The QHttp, QHttpHeader, QHttpResponseHeader and QHttpRequestHeader classes have
192 been removed, QNetworkAccessManager should be used instead.
194 - The QFtp class is no longer exported, QNetworkAccessManager should be used
199 * On Windows, QProcess::ForwardedChannels will not forward the output of GUI
200 applications anymore, if they do not create a console.
202 - QAbstractSocket's connectToHost() and disconnectFromHost() are now virtual and
203 connectToHostImplementation() and disconnectFromHostImplementation() don't exist.
205 - QTcpServer::incomingConnection() now takes a qintptr instead of an int.
207 - QNetworkConfiguration::bearerName() removed, and bearerTypeName() should be used.
209 - QDir::convertSeparators() (deprecated since Qt 4.2) has been removed. Use
210 QDir::toNativeSeparators() instead.
212 - QIconEngineV2 was merged into QIconEngine
213 You might need to adjust your code if it used a QIconEngine.
216 * Projects which explicitly set an empty TARGET are considered broken now.
217 * The makespec and .qmake.cache do not see build pass specific variables any more.
218 * load()/include() with a target namespace and infile()/$$fromfile() now start with
219 an entirely pristine context.
220 * Configure's -sysroot and -hostprefix are now handled slightly differently.
221 The QT_INSTALL_... properties are now automatically prefixed with the sysroot;
222 the raw values are available as QT_RAW_INSTALL_... and the sysroot as QT_SYSROOT.
223 The new QT_HOST_... properties can be used to refer to the Qt host tools.
224 * Several functions and built-in variables were modified to return normalized paths.
226 - QTextCodecPlugin has been removed since it is no longer used. All text codecs
227 are now built into QtCore.
229 - QDir::NoDotAndDotDot is QDir::NoDot|QDir::NoDotDot therefore there is no need
230 to use or check both.
232 - QFSFileEngine, QAbstractFileEngine, QAbstractFileEngineIterator and
233 QAbstractFileEngineHandler were removed from public API and are no longer
234 exported. They may temporarily live as private implementation details, but
235 they may be altogether dropped or otherwise changed at will in the future.
238 * toShort(), toUShort(), toInt(), toUInt(), toLongLong() and toULongLong() no
239 longer take a parameter for base, they will only perform localised base 10
240 conversions. For converting other bases use the QString methods instead.
242 - QSystemLocale has been removed from the public API.
244 - QSqlQueryModel::indexInQuery() is now virtual. See note below under QSql.
246 - qMacVersion() has been removed. Use QSysInfo::macVersion() or
247 QSysInfo::MacintoshVersion instead.
249 ****************************************************************************
251 ****************************************************************************
256 - The directory structure of the qtbase unit-tests has been reworked to
257 more closely match the directory structure of the code under test.
258 Integration tests have been moved to tests/auto/integrationtests.
260 Third party components
261 ----------------------
266 ****************************************************************************
268 ****************************************************************************
272 * drop a bogus QChar::NoCategory enum value; the proper QChar::Other_NotAssigned
273 value is returned for an unassigned codepoints now.
275 * layoutAboutToBeChanged is no longer emitted by QAbstractItemModel::beginMoveRows.
276 layoutChanged is no longer emitted by QAbstractItemModel::endMoveRows. Proxy models
277 should now also connect to (and disconnect from) the rowsAboutToBeMoved and
280 * The default value of the property QSortFilterProxyModel::dynamicSortFilter was
281 changed from false to true.
283 * The signature of the virtual QAbstractItemView::dataChanged method has changed to
284 include the roles which have changed. The signature is consistent with the dataChanged
287 * QFileSystemWatcher is now able to return failure in case of errors whilst
288 altering the watchlist in both the singular and QStringList overloads of
289 addPath and removePath.
291 * QString::mid, QString::midRef and QByteArray::mid, if the position passed
292 is equal to the length (that is, right after the last character/byte),
293 now return an empty QString, QStringRef or QByteArray respectively.
294 in Qt 4 they returned a null QString or a null QStringRef.
296 * QString methods toLongLong(), toULongLong(), toLong(), toULong(), toInt(),
297 toUInt(), toShort(), toUShort(), toDouble(), and toFloat() no longer use the
298 default or system locale, they will always use the C locale. This is to
299 guarantee consistent default conversion of strings. For locale-aware conversions
300 use the equivalent QLocale methods.
302 * QDate, QTime, and QDateTime have undergone important behavioural changes:
303 * QDate only implements the Gregorian calendar, the switch to the Julian
304 calendar before 1582 has been removed. This means all QDate methods will
305 return different results for dates prior to 15 October 1582, and there is
306 no longer a gap between 4 October 1582 and 15 October 1582.
307 * QDate::setYMD() is deprecated, use QDate::setDate() instead
308 * Most methods now apply strict validity checks and will return appropriate
309 and consistent values when invalid. For example, QDate::year() will return
310 0 and QDate::shortMonthName() will return QString().
311 * Adding days to a null QDate or seconds to a null QTime will no longer return
313 * QDate stores the Julian Day as a qint64 extending date support across a
314 more interesting range, see the class documentation for details.
315 * Conversion to YMD form dates is only accurate between to 4800 BCE to
317 * The QDate::addDays() and QDateTime::addDays() methods now take a qint64
318 * The QDate::daysTo() and QDateTime::daysTo() methods now return a qint64
320 * QTextCodec::codecForCStrings() and QTextCodec::setCodecForCStrings() have both
321 been removed. This was removed due to issues with breaking other code from
322 libraries, creating uncertainty/bugs in using QString easily, and (to a lesser
323 extent) performance issues.
325 * QTextCodec::codecForTr() and QTextCodec::setCodecForTr() have been removed,
326 QCoreApplication::Encoding value CodecForTr is now obsolete, use
327 DefaultCodec instead. For reasoning, see the codecForCStrings() removal above.
329 * QIntValidator and QDoubleValidator no longer fall back to using the C locale if
330 the requested locale fails to validate the input.
332 * A new set of classes for doing pattern matching with Perl-compatible regular
333 expressions has been added: QRegularExpression, QRegularExpressionMatch and
334 QRegularExpressionMatchIterator. They aim to replace QRegExp with a more
335 powerful and flexible regular expression engine.
339 * Accessibility has been refactored. The hierachy of accessible objects is implemented via
340 proper parent/child functions instead of using navigate which has been deprecated for this purpose.
341 Table and cell interfaces have been added to qaccessible2.h
343 * Touch events and points have been extended to hold additional
344 information like capability flags, point-specific flags, velocity,
349 * QInputContext removed as well as related getters and setters on QWidget and QApplication.
350 Input contexts are now platform specific.
352 * QInputDialog::getInteger() has been obsoleted. Use QInputDialog::getInt() instead.
354 * In Qt 4, many QStyleOption subclasses were introduced in order to keep
355 binary compatibility -- QStyleOption was designed to be extended this way,
356 in fact it embeds a version number. In Qt 5 the various QStyleOption*V{2,3,4}
357 classes have been removed, and their members merged into the respective
358 base classes. Those classes were left as typedefs to keep existing code
359 working. Still, some minor adjustements could be necessary, especially in code
360 that uses QStyleOption directly and does not initialize all the members using
361 the proper Qt API: due to the version bump, QStyle will try to use the additional
362 QStyleOption members, which are left default-initialized.
366 * QHostAddress::isLoopback() API added. Returns true if the address is
367 one of the IP loopback addresses.
369 * QSslCertificate::serialNumber() now always returns the serial number in
372 * The openssl network backend now reads the ssl configuration file allowing
373 the use of openssl engines.
385 * [QTBUG-20615] Autotests can now log test output to multiple destinations
386 and log formats simultaneously.
390 QSqlTableModel/QSqlRelationalTableModel
392 * The dataChanged() signal is now emitted for changes made to an inserted
393 record that has not yet been committed. Previously, dataChanged() was
394 suppressed in this case for OnRowChange and OnFieldChange. This was probably
395 an attempt to avoid trouble if setData() was called while handling
396 primeInsert(). By emitting dataChanged(), we ensure that all views are aware
399 * While handling primeInsert() signal, the record must be manipulated using
400 the provided reference. Do not attempt to manipulate the records using the
401 model methods setData() or setRecord().
403 * removeRows() no longer emits extra beforeDelete signal for out of range row.
405 * removeRows() now requires the whole range of targetted rows to be valid
406 before doing anything. Previously, it would remove what it could and
407 ignore the rest of the range.
409 * setRecord() and insertRecord()
410 -Only use fields where generated flag is set to true. This is
411 is consistent with the meaning of the flag.
412 -Require all fields to map correctly. Previously fields that didn't
413 map were simply ignored.
414 -For OnManualSubmit, insertRecord() no longer leaves behind an empty
415 row if setRecord() fails.
417 * QSqlQueryModel::indexInQuery() is now virtual. See
418 QSqlTableModel::indexInQuery() as example of how to implement in a
421 * QSqlTableModel::selectRow(): This is a new method that refreshes a single
422 row in the model from the database.
424 * QSqlTableModel edit strategies OnFieldChange/OnRowChange QTBUG-2875
425 Previously, after changes were submitted in these edit strategies, select()
426 was called which removed and inserted all rows. This ruined navigation
427 in QTableView. Now, with these edit strategies, there is no implicit select()
428 done after committing. This includes deleted rows which remain in
429 the model as blank rows until the application calls select(). Instead,
430 selectRow() is called to refresh only the affected row.
432 ****************************************************************************
434 ****************************************************************************
437 ****************************************************************************
438 * Platform Specific Changes *
439 ****************************************************************************
447 * Accessibility framework uses IAccessible2
454 Qt for Embedded Linux
455 ---------------------
462 ****************************************************************************
463 * Compiler Specific Changes *
464 ****************************************************************************
467 ****************************************************************************
469 ****************************************************************************
473 * Remove qttest_p4.prf file. From now on we should explicitly enable the
474 things from it which we want. Autotest .pro files should stop using
475 'load(qttest_p4)' and start using 'CONFIG+=testcase' instead.
480 * [QTBUG-8926] [QTBUG-20440] Properties of type QStringList now have
481 translation attributes which apply to all items.
482 They are by default translatable.
491 * [QTBUG-20785] The moc now has a -b<file> option to #include an additional
492 file at the beginning of the generated file.
503 * QMAKE_MOC_OPTIONS variable is now available for passing additional parameters
513 ****************************************************************************
515 ****************************************************************************
516 - The text codecs that were previously plugins are now built into QtCore.
518 ****************************************************************************
519 * Important Behavior Changes *
520 ****************************************************************************
524 * QPointer itself is now deprecated, and the implementation of QPointer
525 has been changed to use QWeakPointer. The old guard mechanism has been
526 removed. This causes two slight changes in behavior when using
529 * When using QPointer on a QWidget (or a subclass of QWidget), previously
530 the QPointer would be cleared by the QWidget destructor. Now, the QPointer
531 is cleared by the QObject destructor (since this is when QWeakPointers are
532 cleared). Any QPointers tracking a widget will NOT be cleared before the
533 QWidget destructor destroys the children for the widget being tracked.
535 * When constructing a QSharedPointer to take ownership of an object after a
536 QPointer is already tracking the object. Previously, the shared pointer
537 construction would not be affected by the QPointer, but now that QPointer
538 is implemented using QWeakPoiner, constructing the QSharedPointer will
544 * Definition of QVariant::UserType changed. Currently it is the same as
545 QMetaType::User, which means that it points to the first registered custom
546 type, instead of a nonexistent type.
550 * Interpretation of QMetaType::Void was changed. Before, in some cases
551 it was returned as an invalid type id, but sometimes it was used as a valid
552 type (C++ "void"). In Qt5, new QMetaType::UnknownType was introduced to
553 distinguish between these two. QMetaType::UnknownType is an invalid type id
554 signaling that a type is unknown to QMetaType, and QMetaType::Void
555 is a valid type id of C++ void type. The difference will be visible for
556 example in call to QMetaType::typeName(), this function will return null for
557 QMetaType::UnknownType and a pointer to "void" string for
559 Please, notice that QMetaType::UnknownType has value 0, which previously was
560 reserved for QMetaType::Void.
565 * The static function QMessageBox::question has changed the default argument
566 for buttons. Before the default was to have an Ok button. That is changed
567 to having a yes and a no button.