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.nokia.com/
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 The build-key is obsolete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 - QMetaType::construct() has been renamed to QMetaType::create().
58 * The QTRY_VERIFY and QTRY_COMPARE macros have been moved into QTestLib.
59 These macros formerly lived in tests/shared/util.h but are now provided
60 by including the <QtTest/QtTest> header. In addition,
61 QTRY_VERIFY_WITH_TIMEOUT and QTRY_COMPARE_WITH_TIMEOUT are provided,
62 allowing for specifying custom timeout values.
63 * The QTEST_NOOP_MAIN macro has been removed from the API. If a test is
64 known at compile-time to be inapplicable for a particular build it should
65 be omitted via .pro file logic, or the test should call QSKIP in the
66 initTestCase() method to skip the entire test and report a meaningful
67 explanation in the test log.
68 * The DEPENDS_ON macro has been removed from the API. This macro did nothing
69 and misled some users to believe that they could make test functions depend
70 on each other or impose an execution order on test functions.
71 * The QTest::qt_snprintf function has been removed from the API. This was an
72 internal testlib function that was exposed in the public API due to its use
73 in a public macro. Any calls to this function should be replaced by a call
74 to qsnprintf(), which comes from the <QtCore/QByteArray> header.
75 * The QTest::pixmapsAreEqual() function has been removed from the API.
76 Comparison of QPixmap objects should be done using QCOMPARE, which provides
77 more informative output in the event of a failure.
78 * The QSKIP macro no longer has the "mode" parameter, which caused problems
79 for calculating test metrics, as the SkipAll mode hid information about
80 what test data was skipped. Calling QSKIP in a test function now behaves
81 like SkipSingle -- skipping a non-data-driven test function or skipping
82 only the current data row of a data-driven test function. Every skipped
83 data row is now reported in the test log.
85 - The QSsl::TlsV1 enum value was renamed to QSsl::TlsV1_0 .
88 * Internal QAccessible::State enum value HasInvokeExtension removed
89 - QAccessibleInterface:
90 * The "child" integer parameters have been removed. This moves the api
91 to be closer to IAccessible2.
92 This means several functions lose their integer parameter:
93 text(Text t, int child) -> text(Text t), rect(int child) -> rect()
94 setText(Text t, int child, const QString &text) -> setText(Text t, const QString &text)
95 role(int child) -> role(), state(int child) -> state()
96 relationTo(int child, const QAccessibleInterface *other, int otherChild) ->
97 relationTo(const QAccessibleInterface *other)
98 * Accessible-Action related functions have been removed. QAccessibleInterface
99 subclasses are expected to implement the QAccessibleActionInterface instead.
100 These functions have been removed:
101 QAccessibleInterface::userActionCount, QAccessibleInterface::actionText,
102 QAccessibleInterface::doAction
103 - QAccessibleEvent also loses the child parameter.
104 QAccessibleEvent(Type type, int child) -> QAccessibleEvent(Type type)
105 QAccessibleEvent::child() removed.
106 - QAccessibleActionInterface:
107 * Refactored to be based on action names. All functions have been changed from using
108 int parameters to strings.
110 - QSound has been moved from QtGui to QtMultimedia
112 - QTabletEvent::QTabletEvent does not take a hiResGlobalPos argument anymore,
113 as all coordinates are floating point based now.
117 * The DeviceType enum and deviceType() have been deprecated due to
118 the introduction of QTouchDevice.
120 * The signature of the constructor has changed. It now takes a
121 QTouchDevice pointer instead of just a DeviceType value.
123 * TouchPointState no longer includes TouchPointStateMask and
124 TouchPointPrimary. QTouchEvent::TouchPoint::isPrimary() has
127 * QWidget *widget() has been removed and is replaced by QObject
128 *target() in order to avoid QWidget dependencies.
132 * It is no longer possible to use Q_DECLARE_METATYPE(Foo*) where Foo is only
133 forward declared - it must be fully defined.
137 * The signature of the createEditor and valuePropertyName methods
138 have been changed to take arguments of type int instead of QVariant::Type.
140 - QWindowSystemInterface:
142 * The signature of all handleTouchEvent() variants have changed,
143 taking a QTouchDevice* instead of just a DeviceType value.
144 Platform or generic plug-ins have to create and register at least
145 one QTouchDevice before sending the first touch event.
147 * The event type parameter is removed from handleTouchEvent().
149 - The previously exported function qt_translateRawTouchEvent() has been removed.
150 Use QWindowSystemInterface::handleTouchEvent() instead.
152 - QAbstractEventDispatcher
154 * The signature for the pure-virtual registerTimer() has changed. Subclasses
155 of QAbstractEventDispatcher will need to be updated to reimplement the new
156 pure-virtual 'virtual void registerTimer(int timerId, int interval,
157 Qt::TimerType timerType, QObject *object) = 0;'
159 * QAbstractEventDispatcher::TimerInfo is no longer a QPair<int, int>. It is
160 now a struct with 3 members: struct TimerInfo { int timerId; int interval;
161 Qt::TimerType timerType; }; Reimplementations of
162 QAbstractEventDispatcher::registeredTimers() will need to be updated to pass
163 3 arguments to the TimerInfo constructor (instead of 2).
167 * Removed implicit conversion operator QUuid::operator QString(), instead
168 QUuid::toString() function should be used.
170 - The QHttp, QHttpHeader, QHttpResponseHeader and QHttpRequestHeader classes have
171 been removed, QNetworkAccessManager should be used instead.
173 - The QFtp class is no longer exported, QNetworkAccessManager should be used
178 * On Windows, QProcess::ForwardedChannels will not forward the output of GUI
179 applications anymore, if they do not create a console.
181 - QAbstractSocket's connectToHost() and disconnectFromHost() are now virtual and
182 connectToHostImplementation() and disconnectFromHostImplementation() don't exist.
184 - QTcpServer::incomingConnection() now takes a qintptr instead of an int.
186 - QNetworkConfiguration::bearerName() removed, and bearerTypeName() should be used.
188 - QDir::convertSeparators() (deprecated since Qt 4.2) has been removed. Use
189 QDir::toNativeSeparators() instead.
191 - QIconEngineV2 was merged into QIconEngine
192 You might need to adjust your code if it used a QIconEngine.
195 * several functions and built-in variables were modified to return normalized paths.
197 - QTextCodecPlugin has been removed since it is no longer used. All text codecs
198 are now built into QtCore.
200 - QDir::NoDotAndDotDot is QDir::NoDot|QDir::NoDotDot therefore there is no need
201 to use or check both.
204 * toShort(), toUShort(), toInt(), toUInt(), toLongLong() and toULongLong() no
205 longer take a parameter for base, they will only perform localised base 10
206 conversions. For converting other bases use the QString methods instead.
208 - QSystemLocale has been removed from the public API.
210 ****************************************************************************
212 ****************************************************************************
217 - The directory structure of the qtbase unit-tests has been reworked to
218 more closely match the directory structure of the code under test.
219 Integration tests have been moved to tests/auto/integrationtests.
221 Third party components
222 ----------------------
227 ****************************************************************************
229 ****************************************************************************
233 * drop a bogus QChar::NoCategory enum value; the proper QChar::Other_NotAssigned
234 value is returned for an unassigned codepoints now.
236 * layoutAboutToBeChanged is no longer emitted by QAbstractItemModel::beginMoveRows.
237 layoutChanged is no longer emitted by QAbstractItemModel::endMoveRows. Proxy models
238 should now also connect to (and disconnect from) the rowsAboutToBeMoved and
241 * The default value of the property QSortFilterProxyModel::dynamicSortFilter was
242 changed from false to true.
244 * The signature of the virtual QAbstractItemView::dataChanged method has changed to
245 include the roles which have changed. The signature is consistent with the dataChanged
248 * QFileSystemWatcher is now able to return failure in case of errors whilst
249 altering the watchlist in both the singular and QStringList overloads of
250 addPath and removePath.
252 * QString::mid, QString::midRef and QByteArray::mid, if the position passed
253 is equal to the length (that is, right after the last character/byte),
254 now return an empty QString, QStringRef or QByteArray respectively.
255 in Qt 4 they returned a null QString or a null QStringRef.
257 * QString methods toLongLong(), toULongLong(), toLong(), toULong(), toInt(),
258 toUInt(), toShort(), toUShort(), toDouble(), and toFloat() no longer use the
259 default or system locale, they will always use the C locale. This is to
260 guarantee consistent default conversion of strings. For locale-aware conversions
261 use the equivalent QLocale methods.
263 * QDate, QTime, and QDateTime have undergone important behavioural changes:
264 * QDate only implements the Gregorian calendar, the switch to the Julian
265 calendar before 1582 has been removed. This means all QDate methods will
266 return different results for dates prior to 15 October 1582, and there is
267 no longer a gap between 4 October 1582 and 15 October 1582.
268 * QDate::setYMD() is deprecated, use QDate::setDate() instead
269 * Most methods now apply strict validity checks and will return appropriate
270 and consistent values when invalid. For example, QDate::year() will return
271 0 and QDate::shortMonthName() will return QString().
272 * Adding days to a null QDate or seconds to a null QTime will no longer return
274 * QDate stores the Julian Day as a qint64 extending date support across a
275 more interesting range, see the class documentation for details.
276 * Conversion to YMD form dates is only accurate between to 4800 BCE to
278 * The QDate::addDays() and QDateTime::addDays() methods now take a qint64
279 * The QDate::daysTo() and QDateTime::daysTo() methods now return a qint64
282 * QIntValidator and QDoubleValidator no longer fall back to using the C locale if
283 the requested locale fails to validate the input.
287 * Accessibility has been refactored. The hierachy of accessible objects is implemented via
288 proper parent/child functions instead of using navigate which has been deprecated for this purpose.
289 Table and cell interfaces have been added to qaccessible2.h
291 * Touch events and points have been extended to hold additional
292 information like capability flags, point-specific flags, velocity,
297 * QInputContext removed as well as related getters and setters on QWidget and QApplication.
298 Input contexts are now platform specific.
300 * QInputDialog::getInteger() has been obsoleted. Use QInputDialog::getInt() instead.
302 * In Qt 4, many QStyleOption subclasses were introduced in order to keep
303 binary compatibility -- QStyleOption was designed to be extended this way,
304 in fact it embeds a version number. In Qt 5 the various QStyleOption*V{2,3,4}
305 classes have been removed, and their members merged into the respective
306 base classes. Those classes were left as typedefs to keep existing code
307 working. Still, some minor adjustements could be necessary, especially in code
308 that uses QStyleOption directly and does not initialize all the members using
309 the proper Qt API: due to the version bump, QStyle will try to use the additional
310 QStyleOption members, which are left default-initialized.
314 * QHostAddress::isLoopback() API added. Returns true if the address is
315 one of the IP loopback addresses.
317 * QSslCertificate::serialNumber() now always returns the serial number in
320 * The openssl network backend now reads the ssl configuration file allowing
321 the use of openssl engines.
333 * [QTBUG-20615] Autotests can now log test output to multiple destinations
334 and log formats simultaneously.
337 ****************************************************************************
339 ****************************************************************************
342 ****************************************************************************
343 * Platform Specific Changes *
344 ****************************************************************************
352 * Accessibility framework uses IAccessible2
359 Qt for Embedded Linux
360 ---------------------
367 ****************************************************************************
368 * Compiler Specific Changes *
369 ****************************************************************************
372 ****************************************************************************
374 ****************************************************************************
378 * Remove qttest_p4.prf file. From now on we should explicitly enable the
379 things from it which we want. Autotest .pro files should stop using
380 'load(qttest_p4)' and start using 'CONFIG+=testcase' instead.
385 * [QTBUG-8926] [QTBUG-20440] Properties of type QStringList now have
386 translation attributes which apply to all items.
387 They are by default translatable.
396 * [QTBUG-20785] The moc now has a -b<file> option to #include an additional
397 file at the beginning of the generated file.
408 * QMAKE_MOC_OPTIONS variable is now available for passing additional parameters
418 ****************************************************************************
420 ****************************************************************************
421 - The text codecs that were previously plugins are now built into QtCore.
423 ****************************************************************************
424 * Important Behavior Changes *
425 ****************************************************************************
429 * QPointer itself is now deprecated, and the implementation of QPointer
430 has been changed to use QWeakPointer. The old guard mechanism has been
431 removed. This causes two slight changes in behavior when using
434 * When using QPointer on a QWidget (or a subclass of QWidget), previously
435 the QPointer would be cleared by the QWidget destructor. Now, the QPointer
436 is cleared by the QObject destructor (since this is when QWeakPointers are
437 cleared). Any QPointers tracking a widget will NOT be cleared before the
438 QWidget destructor destroys the children for the widget being tracked.
440 * When constructing a QSharedPointer to take ownership of an object after a
441 QPointer is already tracking the object. Previously, the shared pointer
442 construction would not be affected by the QPointer, but now that QPointer
443 is implemented using QWeakPoiner, constructing the QSharedPointer will
449 * The static function QMessageBox::question has changed the default argument
450 for buttons. Before the default was to have an Ok button. That is changed
451 to having a yes and a no button.