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 The build-key is obsolete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 - Qt::escape() is deprecated (but can be enabled via
40 QT_DISABLE_DEPRECATED_BEFORE), use QString::toHtmlEscaped() instead.
42 - QBool is gone. QString::contains, QByteArray::contains, and QList::contains
43 used to return an internal QBool class so that the Qt3 code
44 "if (a.contains() == 2)" wouldn't compile anymore. Such code cannot exist
45 in Qt4, so these methods return a bool now. If your code used the undocumented
46 QBool, simply replace it with bool.
48 - qIsDetached<> has been removed without replacement.
51 * QMetaType::construct() has been renamed to QMetaType::create().
52 * QMetaType::unregisterType() has been removed.
55 * The plain-text, xml and lightxml test output formats have been changed to
56 show a test result for every row of test data in data-driven tests. In
57 Qt4, only fails and skips were shown for individual data rows and passes
58 were not shown for individual data rows, preventing accurate calculation
59 of test run rates and pass rates.
60 * The QTRY_VERIFY and QTRY_COMPARE macros have been moved into QTestLib.
61 These macros formerly lived in tests/shared/util.h but are now provided
62 by including the <QtTest/QtTest> header. In addition,
63 QTRY_VERIFY_WITH_TIMEOUT and QTRY_COMPARE_WITH_TIMEOUT are provided,
64 allowing for specifying custom timeout values.
65 * The QTEST_NOOP_MAIN macro has been removed from the API. If a test is
66 known at compile-time to be inapplicable for a particular build it should
67 be omitted via .pro file logic, or the test should call QSKIP in the
68 initTestCase() method to skip the entire test and report a meaningful
69 explanation in the test log.
70 * The DEPENDS_ON macro has been removed from the API. This macro did nothing
71 and misled some users to believe that they could make test functions depend
72 on each other or impose an execution order on test functions.
73 * The QTest::qt_snprintf function has been removed from the API. This was an
74 internal testlib function that was exposed in the public API due to its use
75 in a public macro. Any calls to this function should be replaced by a call
76 to qsnprintf(), which comes from the <QtCore/QByteArray> header.
77 * The QTest::pixmapsAreEqual() function has been removed from the API.
78 Comparison of QPixmap objects should be done using QCOMPARE, which provides
79 more informative output in the event of a failure.
80 * The QSKIP macro no longer has the "mode" parameter, which caused problems
81 for calculating test metrics, as the SkipAll mode hid information about
82 what test data was skipped. Calling QSKIP in a test function now behaves
83 like SkipSingle -- skipping a non-data-driven test function or skipping
84 only the current data row of a data-driven test function. Every skipped
85 data row is now reported in the test log.
87 - The QSsl::TlsV1 enum value was renamed to QSsl::TlsV1_0 .
90 * Internal QAccessible::State enum value HasInvokeExtension removed
91 - QAccessibleInterface:
92 * The "child" integer parameters have been removed. This moves the api
93 to be closer to IAccessible2.
94 This means several functions lose their integer parameter:
95 text(Text t, int child) -> text(Text t), rect(int child) -> rect()
96 setText(Text t, int child, const QString &text) -> setText(Text t, const QString &text)
97 role(int child) -> role(), state(int child) -> state()
98 * parent() and child() was added in order to do hierarchical navigation.
99 * relations() was added as a replacement to relationTo()
100 * As a consequence of the above two points, navigate() was removed.
101 * Accessible-Action related functions have been removed. QAccessibleInterface
102 subclasses are expected to implement the QAccessibleActionInterface instead.
103 These functions have been removed:
104 QAccessibleInterface::userActionCount, QAccessibleInterface::actionText,
105 QAccessibleInterface::doAction
106 - QAccessibleEvent also loses the child parameter.
107 QAccessibleEvent(Type type, int child) -> QAccessibleEvent(Type type)
108 QAccessibleEvent::child() removed.
109 - QAccessibleActionInterface:
110 * Refactored to be based on action names. All functions have been changed from using
111 int parameters to strings.
113 - QSound has been moved from QtGui to QtMultimedia
115 - QTabletEvent::QTabletEvent does not take a hiResGlobalPos argument anymore,
116 as all coordinates are floating point based now.
120 * The DeviceType enum and deviceType() have been deprecated due to
121 the introduction of QTouchDevice.
123 * The signature of the constructor has changed. It now takes a
124 QTouchDevice pointer instead of just a DeviceType value.
126 * TouchPointState no longer includes TouchPointStateMask and
127 TouchPointPrimary. QTouchEvent::TouchPoint::isPrimary() has
130 * QWidget *widget() has been removed and is replaced by QObject
131 *target() in order to avoid QWidget dependencies.
133 * QEvent::TouchCancel has been introduced. On systems where it makes
134 sense this event type can be used to differentiate between a
135 regular TouchEnd and abrupt touch sequence cancellations caused by
136 the compositor, for example when a system gesture gets recognized.
140 * Q_DECLARE_METATYPE(Foo*) now requires that Foo is fully defined. In
141 cases where a forward declared type should be used as a metatype,
142 Q_DECLARE_OPAQUE_POINTER(Foo*) can be used to allow that.
146 * The signature of the createEditor and valuePropertyName methods
147 have been changed to take arguments of type int instead of QVariant::Type.
149 - QWindowSystemInterface:
151 * The signature of all handleTouchEvent() variants have changed,
152 taking a QTouchDevice* instead of just a DeviceType value.
153 Platform or generic plug-ins have to create and register at least
154 one QTouchDevice before sending the first touch event.
156 * The event type parameter is removed from handleTouchEvent().
158 - The previously exported function qt_translateRawTouchEvent() has been removed.
159 Use QWindowSystemInterface::handleTouchEvent() instead.
161 - QAbstractEventDispatcher
163 * The signature for the pure-virtual registerTimer() has changed. Subclasses
164 of QAbstractEventDispatcher will need to be updated to reimplement the new
165 pure-virtual 'virtual void registerTimer(int timerId, int interval,
166 Qt::TimerType timerType, QObject *object) = 0;'
168 * QAbstractEventDispatcher::TimerInfo is no longer a QPair<int, int>. It is
169 now a struct with 3 members: struct TimerInfo { int timerId; int interval;
170 Qt::TimerType timerType; }; Reimplementations of
171 QAbstractEventDispatcher::registeredTimers() will need to be updated to pass
172 3 arguments to the TimerInfo constructor (instead of 2).
176 * Removed implicit conversion operator QUuid::operator QString(), instead
177 QUuid::toString() function should be used.
179 - The QHttp, QHttpHeader, QHttpResponseHeader and QHttpRequestHeader classes have
180 been removed, QNetworkAccessManager should be used instead.
182 - The QFtp class is no longer exported, QNetworkAccessManager should be used
187 * On Windows, QProcess::ForwardedChannels will not forward the output of GUI
188 applications anymore, if they do not create a console.
190 - QAbstractSocket's connectToHost() and disconnectFromHost() are now virtual and
191 connectToHostImplementation() and disconnectFromHostImplementation() don't exist.
193 - QTcpServer::incomingConnection() now takes a qintptr instead of an int.
195 - QNetworkConfiguration::bearerName() removed, and bearerTypeName() should be used.
197 - QDir::convertSeparators() (deprecated since Qt 4.2) has been removed. Use
198 QDir::toNativeSeparators() instead.
200 - QIconEngineV2 was merged into QIconEngine
201 You might need to adjust your code if it used a QIconEngine.
204 * Projects which explicitly set an empty TARGET are considered broken now.
205 * The makespec and .qmake.cache do not see build pass specific variables any more.
206 * load()/include() with a target namespace and infile()/$$fromfile() now start with
207 an entirely pristine context.
208 * Configure's -sysroot and -hostprefix are now handled slightly differently.
209 The QT_INSTALL_... properties are now automatically prefixed with the sysroot;
210 the raw values are available as QT_INSTALL_.../raw and the sysroot as QT_SYSROOT.
211 The new QT_HOST_... properties can be used to refer to the Qt host tools.
212 * Several functions and built-in variables were modified to return normalized paths.
214 - QTextCodecPlugin has been removed since it is no longer used. All text codecs
215 are now built into QtCore.
217 - QDir::NoDotAndDotDot is QDir::NoDot|QDir::NoDotDot therefore there is no need
218 to use or check both.
220 - QFSFileEngine, QAbstractFileEngine, QAbstractFileEngineIterator and
221 QAbstractFileEngineHandler were removed from public API and are no longer
222 exported. They may temporarily live as private implementation details, but
223 they may be altogether dropped or otherwise changed at will in the future.
226 * toShort(), toUShort(), toInt(), toUInt(), toLongLong() and toULongLong() no
227 longer take a parameter for base, they will only perform localised base 10
228 conversions. For converting other bases use the QString methods instead.
230 - QSystemLocale has been removed from the public API.
232 - QSqlQueryModel::indexInQuery() is now virtual. See note below under QtSql.
234 - qMacVersion() has been removed. Use QSysInfo::macVersion() or
235 QSysInfo::MacintoshVersion instead.
237 ****************************************************************************
239 ****************************************************************************
244 - The directory structure of the qtbase unit-tests has been reworked to
245 more closely match the directory structure of the code under test.
246 Integration tests have been moved to tests/auto/integrationtests.
248 Third party components
249 ----------------------
254 ****************************************************************************
256 ****************************************************************************
260 * drop a bogus QChar::NoCategory enum value; the proper QChar::Other_NotAssigned
261 value is returned for an unassigned codepoints now.
263 * layoutAboutToBeChanged is no longer emitted by QAbstractItemModel::beginMoveRows.
264 layoutChanged is no longer emitted by QAbstractItemModel::endMoveRows. Proxy models
265 should now also connect to (and disconnect from) the rowsAboutToBeMoved and
268 * The default value of the property QSortFilterProxyModel::dynamicSortFilter was
269 changed from false to true.
271 * The signature of the virtual QAbstractItemView::dataChanged method has changed to
272 include the roles which have changed. The signature is consistent with the dataChanged
275 * QFileSystemWatcher is now able to return failure in case of errors whilst
276 altering the watchlist in both the singular and QStringList overloads of
277 addPath and removePath.
279 * QString::mid, QString::midRef and QByteArray::mid, if the position passed
280 is equal to the length (that is, right after the last character/byte),
281 now return an empty QString, QStringRef or QByteArray respectively.
282 in Qt 4 they returned a null QString or a null QStringRef.
284 * QString methods toLongLong(), toULongLong(), toLong(), toULong(), toInt(),
285 toUInt(), toShort(), toUShort(), toDouble(), and toFloat() no longer use the
286 default or system locale, they will always use the C locale. This is to
287 guarantee consistent default conversion of strings. For locale-aware conversions
288 use the equivalent QLocale methods.
290 * QDate, QTime, and QDateTime have undergone important behavioural changes:
291 * QDate only implements the Gregorian calendar, the switch to the Julian
292 calendar before 1582 has been removed. This means all QDate methods will
293 return different results for dates prior to 15 October 1582, and there is
294 no longer a gap between 4 October 1582 and 15 October 1582.
295 * QDate::setYMD() is deprecated, use QDate::setDate() instead
296 * Most methods now apply strict validity checks and will return appropriate
297 and consistent values when invalid. For example, QDate::year() will return
298 0 and QDate::shortMonthName() will return QString().
299 * Adding days to a null QDate or seconds to a null QTime will no longer return
301 * QDate stores the Julian Day as a qint64 extending date support across a
302 more interesting range, see the class documentation for details.
303 * Conversion to YMD form dates is only accurate between to 4800 BCE to
305 * The QDate::addDays() and QDateTime::addDays() methods now take a qint64
306 * The QDate::daysTo() and QDateTime::daysTo() methods now return a qint64
308 * QTextCodec::codecForCStrings() and QTextCodec::setCodecForCStrings() have both
309 been removed. This was removed due to issues with breaking other code from
310 libraries, creating uncertainty/bugs in using QString easily, and (to a lesser
311 extent) performance issues.
313 * QTextCodec::codecForTr() and QTextCodec::setCodecForTr() have been removed,
314 QCoreApplication::Encoding value CodecForTr is now obsolete, use
315 DefaultCodec instead. For reasoning, see the codecForCStrings() removal above.
317 * QIntValidator and QDoubleValidator no longer fall back to using the C locale if
318 the requested locale fails to validate the input.
320 * A new set of classes for doing pattern matching with Perl-compatible regular
321 expressions has been added: QRegularExpression, QRegularExpressionMatch and
322 QRegularExpressionMatchIterator. They aim to replace QRegExp with a more
323 powerful and flexible regular expression engine.
325 * QEvent::AccessibilityPrepare, AccessibilityHelp and AccessibilityDescription removed:
326 * The enum values simply didn't make sense in the first place and should simply be dropped.
330 * Accessibility has been refactored. The hierachy of accessible objects is implemented via
331 proper parent/child functions instead of using navigate which has been deprecated for this purpose.
332 Table and cell interfaces have been added to qaccessible2.h
334 * Touch events and points have been extended to hold additional
335 information like capability flags, point-specific flags, velocity,
338 * A new set of enabler classes have been added, most importantly QWindow, QScreen,
339 QSurfaceFormat, and QOpenGLContext.
341 * Most of the useful QtOpenGL classes have been polished and moved into
342 QtGui. See QOpenGLFramebufferObject, QOpenGLShaderProgram,
343 QOpenGLFunctions, etc.
345 * QOpenGLPaintDevice has been added to be able to use QPainter to render into
346 the currently bound context.
350 * QInputContext removed as well as related getters and setters on QWidget and QApplication.
351 Input contexts are now platform specific.
353 * QInputDialog::getInteger() has been obsoleted. Use QInputDialog::getInt() instead.
355 * In Qt 4, many QStyleOption subclasses were introduced in order to keep
356 binary compatibility -- QStyleOption was designed to be extended this way,
357 in fact it embeds a version number. In Qt 5 the various QStyleOption*V{2,3,4}
358 classes have been removed, and their members merged into the respective
359 base classes. Those classes were left as typedefs to keep existing code
360 working. Still, some minor adjustements could be necessary, especially in code
361 that uses QStyleOption directly and does not initialize all the members using
362 the proper Qt API: due to the version bump, QStyle will try to use the additional
363 QStyleOption members, which are left default-initialized.
365 * QHeaderView - The following functions have been obsoleted.
367 * void setMovable(bool movable) - use void setSectionsMovable(bool movable) instead.
369 * bool isMovable() const - use bool sectionsMovable() const instead.
371 * void setClickable(bool clickable) - use void setSectionsClickable(bool clickable) instead.
373 * bool isClickable() const - use bool sectionsClickable() instead.
375 * void setResizeMode(int logicalindex, ResizeMode mode) -
376 use setSectionResizeMode(logicalindex, mode) instead.
378 * ResizeMode resizeMode(int logicalindex) const -
379 use sectionResizeMode(int logicalindex) instead.
383 * QHostAddress::isLoopback() API added. Returns true if the address is
384 one of the IP loopback addresses.
386 * QSslCertificate::serialNumber() now always returns the serial number in
389 * The openssl network backend now reads the ssl configuration file allowing
390 the use of openssl engines.
396 * Most of the classes in this module (with the notable exception of QGLWidget)
397 now have equivalents in QtGui, along with the naming change QGL -> QOpenGL.
398 The classes in QtOpenGL that have equivalents in QtGui can now be considered
407 * [QTBUG-20615] Autotests can now log test output to multiple destinations
408 and log formats simultaneously.
412 QSqlTableModel/QSqlRelationalTableModel
414 * The dataChanged() signal is now emitted for changes made to an inserted
415 record that has not yet been committed. Previously, dataChanged() was
416 suppressed in this case for OnRowChange and OnFieldChange. This was probably
417 an attempt to avoid trouble if setData() was called while handling
418 primeInsert(). By emitting dataChanged(), we ensure that all views are aware
421 * While handling primeInsert() signal, the record must be manipulated using
422 the provided reference. Do not attempt to manipulate the records using the
423 model methods setData() or setRecord().
425 * removeRows() no longer emits extra beforeDelete signal for out of range row.
427 * removeRows() now requires the whole range of targetted rows to be valid
428 before doing anything. Previously, it would remove what it could and
429 ignore the rest of the range.
431 * removeRows(), for OnFieldChange and OnRowChange, allows only 1 row to be
432 removed and only if there are no other changed rows.
434 * setRecord() and insertRecord()
435 -Only use fields where generated flag is set to true. This is
436 is consistent with the meaning of the flag.
437 -Require all fields to map correctly. Previously fields that didn't
438 map were simply ignored.
439 -For OnManualSubmit, insertRecord() no longer leaves behind an empty
440 row if setRecord() fails.
441 -setRecord() now automatically submits for OnRowChange.
443 * QSqlQueryModel::indexInQuery() is now virtual. See
444 QSqlTableModel::indexInQuery() as example of how to implement in a
447 * QSqlTableModel::selectRow(): This is a new method that refreshes a single
448 row in the model from the database.
450 * QSqlTableModel edit strategies OnFieldChange/OnRowChange QTBUG-2875
451 Previously, after changes were submitted in these edit strategies, select()
452 was called which removed and inserted all rows. This ruined navigation
453 in QTableView. Now, with these edit strategies, there is no implicit select()
454 done after committing. This includes deleted rows which remain in
455 the model as blank rows until the application calls select(). Instead,
456 selectRow() is called to refresh only the affected row.
458 * QSqlTableModel::isDirty(): New overloaded method to check whether model
459 has any changes to submit. QTBUG-3108
461 * QSqlTableModel::setData() and setRecord() no longer revert pending changes
462 that fail upon resubmitting for edit strategies OnFieldChange and OnRowChange.
463 Instead, pending (failed) changes cause new changes inappropriate to the
464 edit strategy to be refused. The application should resolve or revert pending
465 changes. insertRows() and insertRecord() also respect the edit strategy.
467 * QSqlTableModel::setData() and setRecord() in OnRowChange no longer have the
468 side effect of submitting the cached row when invoked on a different row.
469 ****************************************************************************
471 ****************************************************************************
475 * QVariant::Bool type now mapped to integers 0/1 in SQL instead of strings
476 'true' and 'false'. Sqlite does not have a boolean column type and it is
477 customary to use integer. QTBUG-23895
479 ****************************************************************************
480 * Platform Specific Changes *
481 ****************************************************************************
489 * Accessibility framework uses IAccessible2
496 Qt for Embedded Linux
497 ---------------------
504 ****************************************************************************
505 * Compiler Specific Changes *
506 ****************************************************************************
509 ****************************************************************************
511 ****************************************************************************
515 * Remove qttest_p4.prf file. From now on we should explicitly enable the
516 things from it which we want. Autotest .pro files should stop using
517 'load(qttest_p4)' and start using 'CONFIG+=testcase' instead.
522 * [QTBUG-8926] [QTBUG-20440] Properties of type QStringList now have
523 translation attributes which apply to all items.
524 They are by default translatable.
533 * [QTBUG-20785] The moc now has a -b<file> option to #include an additional
534 file at the beginning of the generated file.
545 * QMAKE_MOC_OPTIONS variable is now available for passing additional parameters
555 ****************************************************************************
557 ****************************************************************************
558 - The text codecs that were previously plugins are now built into QtCore.
560 ****************************************************************************
561 * Important Behavior Changes *
562 ****************************************************************************
566 * The implementation of QPointer has been changed to use QWeakPointer. The
567 old guard mechanism has been removed. This causes a slight change
568 in behavior when using QPointer:
570 * When using QPointer on a QWidget (or a subclass of QWidget), previously
571 the QPointer would be cleared by the QWidget destructor. Now, the QPointer
572 is cleared by the QObject destructor (since this is when QWeakPointers are
573 cleared). Any QPointers tracking a widget will NOT be cleared before the
574 QWidget destructor destroys the children for the widget being tracked.
579 * Definition of QVariant::UserType changed. Currently it is the same as
580 QMetaType::User, which means that it points to the first registered custom
581 type, instead of a nonexistent type.
586 * The static function QMessageBox::question has changed the default argument
587 for buttons. Before the default was to have an Ok button. That is changed
588 to having a yes and a no button.