1 Qt 4.6 introduces many new features and improvements as well as bugfixes

     2 over the 4.5.x series. For more details, refer to the online documentation

     3 included in this distribution. The documentation is also available online:

     4 

     5   http://qt.nokia.com/doc/4.6

     6 

     7 The Qt version 4.6 series is binary compatible with the 4.5.x series.

     8 Applications compiled for 4.5 will continue to run with 4.6.

     9 

    10 Some of the changes listed in this file include issue tracking numbers

    11 corresponding to tasks in the Qt Bug Tracker, the (now obsolete) Task

    12 Tracker, or the Merge Request queue of the public source repository.

    13 

    14 Qt Bug Tracker: http://bugreports.qt.nokia.com

    15 Task Tracker: http://qt.nokia.com/developer/task-tracker

    16 Merge Request: http://qt.gitorious.org

    17 

    18 ****************************************************************************

    19 *                           General                                        *

    20 ****************************************************************************

    21 

    22 New features

    23 ------------

    24 

    25  - QState, QStateMachine

    26     * New classes for state machine framework added to QtCore.

    27 

    28  - QAbstractAnimation

    29     * New animation framework added to QtCore

    30 

    31  - QTouchEvent

    32     * New class for handling multitouch events added to QtGui

    33 

    34  - QGesture, QGestureRecognizer

    35     * New gesture framework added to QtGui

    36 

    37  - QMatrix4x4, QGenericMatrix, QVector2D, QVector3D, QVector4D, QQuaternion

    38     * New classes to support 3D applications.

    39 

    40  - QGLShaderProgram, QGLShader

    41     * New classes for using shader programs written in the GL Shading Language.

    42 

    43  - QGraphicsEffect

    44     * New classes for applying graphics effects to graphics items and widgets.

    45 

    46  - QWebElement

    47     * New class for DOM access added to QtWebKit

    48 

    49  - QAudioInput, QAudioOutput

    50     * New audio input and output classes.

    51 

    52  - QAbstractVideoSurface, QVideoFrame

    53     * New abstract video output classes.

    54 

    55  - OpenVG graphics system added.

    56 

    57  - Added 800x480 screen mode to qvfb configuration dialog.

    58 

    59  - Improved support for input methods in graphics view.

    60 

    61  - [MR#1742] Added new multimedia keys to the Qt::Key enum.

    62 

    63  - Boxes demo ported to use new 3D math and shader program classes.

    64 

    65  - QtTest now supports outputting XUnit XML documents, for integrating

    66    with existing continuous integration systems. This is enabled by

    67    running the test program with the -xunitxml option.

    68 

    69  - QtDBus

    70    * The minimum required version of the D-Bus reference library is

    71      now 0.93.

    72    * Support for reading and writing of custom property types added.

    73    * Support for getting return arguments in remote method invocation

    74      via QMetaMethod::invokeMethod.

    75 

    76  - The QtScript module is now based on the 3rdparty JavaScriptCore library. It

    77    is only available under the LGPL or a compatible license.

    78 

    79 Optimizations

    80 -------------

    81 

    82  - Optimized rendering strategy in QGraphicsView

    83     * See list of Important Behavior Changes below

    84 

    85  - Improved delivery of posted events on Windows

    86 

    87 

    88 ****************************************************************************

    89 *                          Library                                         *

    90 ****************************************************************************

    91 

    92 QtCore

    93 ------

    94  - QAbstractItemModel

    95     * [MR#972] Added API to move items

    96     * [MR#1072] Added function beginResetModel() / endResetModel()

    97 

    98 

    99  - QByteArray

   100     * New overloads for QByteArray::insert() and QByteArray::prepend().

   101     * [MR#1286] Added value_type typedef for STL compatibility

   102 

   103  - QEventDispatcherGlib (internal class)

   104     * Fix a regression introduced in 4.5.3 that would cause timers to not

   105       be delivered.

   106 

   107  - QEventDispatcherUNIX (internal class)

   108     * Improve detection of monotonic clock support to include

   109       non-POSIX.1-2001 compliant systems.

   110     * [250681] Fix time change detection on UNIX systems without monotonic

   111       timers.

   112 

   113  - QEventDispatcherWin32 (internal class)

   114     * Changed the threshold for using multimedia timers to 20ms (was 10ms).

   115     * Changed the way Qt's posted events are sent by the event

   116       dispatcher. They are now driven on top of a Windows message

   117       instead of an explicit call in processEvents(). This means that

   118       posted events are sent even when a Windows modal message loop is

   119       running (for example, when the user is moving a window or when a

   120       native modal dialog is visible).

   121     * Fixed a bug that would allow the same timer id to be used by multiple

   122       QTimer instances.

   123 

   124  - QFile

   125     * Make QFile::resize() more robust when operating on buffered files.

   126 

   127  - QObject

   128     * [259514] fixed a possible dead-lock in the destructor.

   129     * Added the possibility to pass the flag Qt::UniqueConnection to

   130       QObject::connect.

   131     * Fixed race conditions that occured when moving object to threads

   132       while connecting.

   133 

   134  - QPluginLoader

   135     * Improved performance of plugin loading by reusing the plugin cache

   136       instead of loading it every time.

   137 

   138  - QProcessEnvironment

   139     * New class; support for easy access to key/value pairs in the process

   140       environment.

   141 

   142  - QRegExp

   143     * New pattern syntax "QRegExp::WildcardUnix" with wildcard character

   144       escaping.

   145 

   146  - QScopedPointer

   147     * New pointer class for cleaning up objects when leaving the current

   148       scope.

   149 

   150  - QSharedPointer

   151     * Added support for creating the object along with the internal private

   152       data in one single memory allocation. (QSharedPointer::create)

   153     * Fixed a bug where, in a race condition, QSharedPointer could track a

   154       pointer that was being deleted.

   155 

   156  - QTextCodec

   157     * Instantiate the CP949 codec when building with -no-iconv.

   158 

   159  - QTextStream

   160     * [221316] Fixed crash on large input.

   161     * Improved reading utf8/utf16/utf32 data by correctly skipping the

   162       ByteOrderMark when reading data by one character at a time.

   163 

   164  - QThread

   165     * [249997] Document that QThread priority has no effect on Linux.

   166 

   167  - QUrl

   168     * Made QUrl hostname parser a lot stricter, requiring compliance

   169       to STD3 to validate, thus preventing invalid hostnames from

   170       being accepted. See below in "Important Behavior Changes".

   171 

   172  - QUuid

   173     * [QTBUG-3543] Fixed a bug in createUuid() which caused multiple

   174       threads to generate the identical UUID sequences.

   175 

   176  - QVariant

   177     * Many optimisations.

   178     * Added QVariant::toFloat() and QVariant::toReal().

   179     * Added QVariant(float) constructor.

   180     * qvariant_cast<QVariant> and qVariantFromValue<QVariant> are now

   181       identity functions.

   182     * Added support for math3d types.

   183 

   184  - QWeakPointer

   185     * Added support for tracking QObject-derived classes that aren't

   186       attached to a QSharedPointer.

   187     * Added QWeakPointer::data which allows you to obtain the pointer

   188       being tracked (without protection).

   189     * Added operator-> like the above data(), but requires a #define.

   190 

   191  - QXmlStreamWriter

   192     * [256468] Fixed comment indentation.

   193 

   194 QtGui

   195 -----

   196 

   197  - Qt::escape

   198     * Now escape the double quote (").

   199 

   200  - QAbstractItemView

   201     * [256502] Fixes selectionModel::hasSelection return value after

   202       model::reset.

   203     * [MR#1426] Fixes some issues with Shift-selection

   204     * [MR#1668] New QAbstractItemView::setDefaultDropAction

   205 

   206  - QApplication

   207     * [QTBUG-739] Removed internal widgets from QApplication::topLevelWidgets().

   208 

   209  - QCalendarWidget

   210     * [252943] QCalendarWidget::setDateTextFormat() reset the format if the

   211       date is invalid.

   212 

   213  - QColumnView

   214     * [246999] Fixed view not updating when the model changed dynamically.

   215 

   216  - QComboBox

   217     * [220195] Fixed keyboard search when current index is -1.

   218 

   219  - QCompleter

   220     * [246056] Fixed a possible assertion when setting the completer prefix.

   221 

   222  - QEvent

   223     * Introduced RequestSoftwareInputPanel and CloseSoftwareInputPanel events.

   224 

   225  - QFontDialog

   226     * [256466] Fixed the dialog not always returning the selected style.

   227 

   228  - QFontEngine

   229     * [QTBUG-2354] Support certain 'Microsoft' platform symbol fonts which

   230       also contain a regular unicode table for exactly the symbol range of

   231       code points.

   232 

   233  - QFontEngineQPF

   234     * Make alphaMapForGlyph() generate the correct color table for

   235       Indexed8 and Mono glyph images.  Fixed the "all glyphs are white

   236       boxes" problem in OpenGL1 paint engine.

   237 

   238  - QFontMetrics

   239     * [176401] Account for right bearing in bounding rect.

   240 

   241  - QGraphicsAnchorLayout

   242     * Support for expanding size policy has been removed. (The Qt 4.6 Beta

   243       had support for it).

   244 

   245  - QGraphicsBlurEffect

   246     * Since the 4.6 Beta, Qt::RenderHint has been moved to

   247       QGraphicsBlurEffect::BlurHint.

   248     * Input contexts are not activated for disabled widgets anymore.

   249     * [250555] Data copied from Mozilla Firefox can now be pasted correctly to

   250       a Qt application.

   251 

   252  - QGraphicsItem

   253     * Many optimizations.

   254     * Fixed bug and improved accuracy of QGraphicsItem::childrenBoundingRect().

   255     * Introduced QGraphicsItem::ItemHasNoContents.

   256     * Introduced QGraphicsItem::ItemSendsGeometryChanges (see Behavioral

   257       Changes).

   258     * Introduced QGraphicsItem::focusProxy(), focus proxy support.

   259     * Introduced QGraphicsItem::ItemNegativeZStacksBehindParent.

   260     * Introduced QGraphicsItem::ItemIsPanel, light-weight window support.

   261     * Introduced modality support for QGraphicsItem panels.

   262     * Introduced activation support.

   263     * Introduced QGraphicsItem::stackBefore().

   264     * Cached items are now always invalidated when update() is called.

   265     * Added input hints.

   266     * Added a new set of properties to set a transformation on an item.

   267 

   268  - QGraphicsLayout

   269     * Introduced QGraphicsLayout::addChildLayoutItem().

   270 

   271  - QGraphicsObject

   272     * New class; inherits QGraphicsItem and adds notification signals and

   273       property declarations.

   274 

   275  - QGraphicsProxyWidget

   276     * [251407] Fixed window flag handling. Now QGraphicsProxyWidget's flags

   277       win.

   278     * Fix Qt::ClickFocus policy.

   279 

   280  - QGraphicsScene

   281     * Many optimizations.

   282     * [245317] Fixes to mouse grabbing behavior.

   283     * Fixed delivery of double-click events after explicit grab and then ungrab.

   284     * Rewrote the internal rendering to use a recursive instead of an iterative

   285       approach.

   286     * Ensure hover enter events are delivered when an item is pressed.

   287     * Introduced activation support.

   288     * Fixed bugs in initial focus support.

   289 

   290  - QGraphicsTextItem

   291     * Now inherits from QGraphicsObject instead.

   292 

   293  - QGraphicsTransform

   294     * New class; eases animation of transformations for QGraphicsItem.

   295 

   296  - QGraphicsView

   297     * Many optimizations.

   298     * Fix mapToScene(QRect) to avoid extra unnecessary adjustments.

   299     * Introduced QGraphicsView::isTransformed().

   300     * [QTBUG-4151] Items with parent that sets ItemClipsChildrenToShape were

   301       sometimes invisible.

   302 

   303  - QGraphicsWidget

   304     * Now inherits from QGraphicsObject instead.

   305     * Interactive resizing of top level windows now respects height-for-width

   306       constraints.

   307     * Reduced memory footprint.

   308 

   309  - QHeaderView

   310     * [208320] Make sure the sort indicator is taken into account for the size

   311       hint.

   312     * [255574] Make sure the size hint for the section depends on visible

   313       sections.

   314 

   315  - QImageReader

   316     * [255627] Fix floating point exception in

   317       QImageReader::setScaledSize(QSize(0, 0)).

   318 

   319  - QLineEdit

   320     * [248948] Clear selection when redoing a delete operation.

   321     * [QTBUG-5261] Fixed bug where erasing characters from a textedit did not

   322       update the text.

   323 

   324  - QListView

   325     * [243335] Fixed the visualRect to return correct values when the widget is

   326       not yet shown.

   327     * [MR#666] Fixed selection with Shift-Arrow/Shift-Click in QListView's IconMode

   328 

   329  - QMainWindow

   330     * [226060] Adding actions to a toolbar would always make the next toolbar

   331       move.

   332 

   333  - QMenu

   334     * [252610] Fixed position of the shortcut text while setting a stylesheet

   335       on menu items

   336 

   337  - QMenuBar

   338     * [260873] Fix mouse interaction while undocking a widget from the main

   339       window

   340     * Dock areas didn't get a splitter if their dock widgets were not

   341       resizable.

   342 

   343  - QPaintDevice

   344     * New qt_paint_device_metric() function to replace the friend declarations

   345       for window surface classes that need to access metric().

   346 

   347  - QPainter

   348     * [QTBUG-1666] Made QPainter::drawText() respect Qt::TextDontClip flag

   349       also in vertical direction.

   350     * [254658] Improved clipping performance in OpenGL paint engine.

   351 

   352  - QPainterPath

   353     * [QTBUG-1537] Fixed bug where the points of a rounded rectangle were added

   354       in counter-clockwise order instead of clockwise order like other shapes.

   355 

   356  - QPen

   357     * [QTBUG-2738] Made QPen::setDashOffset() work with non-custom dashed lines.

   358 

   359  - QPixmap

   360     * Optimized width(), height(), isNull() and depth().

   361     * [QTBUG-2832] Fixed bug where calling fill on pixmap with active painter

   362       could crash.

   363 

   364  - QPlainTextEdit

   365     * Fixed crash when clicking on a text edit which was smaller than the

   366       height of the font used.

   367 

   368  - QPlastiqueStyle

   369     * [QTBUG-3555] Fixed a bug in the Plastique style that would cause an

   370       ASSERT failure in QFont when the application font has a pixel size set.

   371 

   372  - QPrinter

   373     * [QTBUG-4497] Removed redundant SetPen command in the postscript code when

   374       reusing a QPrinter object.

   375 

   376  - QPrintPreviewDialog now uses a QMainWindow with a proper QToolBar, instead

   377    of a plain layout.

   378 

   379  - QPushButton

   380     * [255581] Fixed sizeHint recalculation bug.

   381 

   382  - QRasterPaintEngine

   383     * [QTBUG-4210] Fixed bug where bitmaps were painted black instead of in pen

   384       colour.

   385 

   386  - QRegion

   387     * Minor optimizations.

   388 

   389  - QSortFilterProxyModel

   390     * [251296] Fixed bugs in which filtered items could not be filtered.

   391 

   392  - QSplitter

   393     * [206494] Added ability to style pressed slider with stylesheet.

   394 

   395  - QSpinBox

   396     * [259226] Fixed setting a stylesheet on a QSpinBox to change the arrow

   397       position.

   398     * [255051] Fixed sizeHint update bug.

   399 

   400  - QStandardItemModel

   401     * [255652] Fixed crash while using takeRow with a QSortFilterProxyModel.

   402 

   403  - QStroker

   404     * [QTBUG-5212] Fixed bug where thick strokes around small shapes could

   405       cause holes in the stroke.

   406 

   407  - QTabBar

   408     * [196326] Fixed having a stylesheet on a QTabBar resulted in some tab

   409       names being slightly clipped.

   410     * [241383] Added ability to style the close tab button with style sheet

   411 

   412  - QTableView

   413     * [191545] Selections work more similarly to well-known spreadsheets.

   414     * [234926] Fixed sorting after changing QTableView header.

   415     * [244651] [245327] [250193] [QTBUG-5062] Spans get plenty of love with

   416       performance improvements, support for row/column insertioa and removal,

   417       and better keyboard navigation.

   418 

   419  - QTableWidget

   420     * [234641] Fixed takeItem to cause the view to be updated.

   421 

   422  - QTextDocument

   423     * [207189] Support setting font size using short hand syntax in the

   424       CSS "font" property.

   425     * [201228] Remove implicit margin on bullet lists when exporting to HTML.

   426     * [240086] Fixed bug which caused floating objects which span several

   427       pages to float into the second page of the document even when it's

   428       the only existing object, causing the document to contain a blank

   429       first page.

   430     * [240325] Even with wrap mode set to Qt::TextWordWrap, the layout

   431       would sometimes break outside word boundaries when floating objects

   432       affected the width available to the text.

   433     * [MR#681] Added support for roman numbering for lists

   434     * [MR#1753] Fixed escaping HTML attributes QTextDocument::toHtml()

   435 

   436 

   437  - QTextLayout

   438     * [QTBUG-4468] Count tabs as multiple characters when applying a fixed

   439       column width.

   440     * [176401] Take into account the negative right bearing of the last

   441       character in an item of text if the glyph extends beyond its ascent.

   442 

   443  - QToolTip

   444     * Fixed a bug where tooltips were not shown in popups (Windows only).

   445 

   446  - QTreeView

   447     * [234930] Be able to use :has-children and :has-sibillings in a stylesheet.

   448     * [252616] Set QStyleOptionViewItemV4::OnlyOne flag when painting spanning

   449       columns.

   450     * [245654] Fixed expandAll when deleting and recreating a mode for the tree.

   451     * [239271] Fixed missing update when adding a row when the first column is

   452       hidden.

   453     * [258225] Fixed scrollTo with center and bottom.

   454 

   455  - QTreeWidget

   456     * [253109] Shows the widget when calling setItemWidget.

   457     * [MR#1393] Use stable sorting.

   458 

   459  - QWidget

   460     * Added inputMethodHints property.

   461     * [201649] Added QWidget::previousInFocusChain.

   462     * [254563] Fixed a crash when setting focus in a widget tree that

   463       contains invisible widgets.

   464     * [QTBUG-5012] Fixed uninitialized background when using QWidget::render

   465       with Qt::WA_NoSystemBackground and window opacity set.

   466 

   467 QtDBus

   468 ------

   469 

   470  - QDBusConnection

   471     * Made sending of invalid/incomplete messages consistently fail with error

   472       (no more assertions).

   473     * [249528/QTBUG-3833] Added an overload of connect() that allows one to

   474       specify strings for matching arguments.

   475 

   476  - QDBusServiceWatcher

   477     * New class; supports efficiently watching for a service to be created,

   478       deleted or to change owners.

   479 

   480 QtNetwork

   481 ---------

   482 

   483  - QAbstractSocket

   484     * Only disconnect from host when all bytes have been written.

   485     * New setSocketOption method.

   486 

   487  - QHttp

   488     * Do not buffer the complete POST data anymore when HTTPS is used.

   489     * QHttp is now obsolete and replaced by QNetworkAccessManager.

   490 

   491  - QLocalServer

   492     * Fix timeout when waiting for a connection on Unix.

   493 

   494  - QNativeSocketEngine

   495     * Do not set the OS socket send and receive buffer size. The OS

   496       should auto tune these values for us.

   497 

   498  - QNetworkAcessManager

   499     * [242916] Add possibility to send HTTP DELETE requests.

   500     * Connection count per HTTP server increased to 6 on Desktop, 3 on Symbian.

   501     * Optional HTTP pipelining support.

   502     * General HTTP performance improvements.

   503 

   504  - QNetworkReply

   505     * [257322] Add possibility to ignore specific SSL errors.

   506     * New isFinished() method.

   507 

   508  - QSslCertificate

   509     * [251830] Fix version() and serialNumber() methods.

   510 

   511  - QSslSocket

   512     * [257322] Add possibility to ignore specific SSL errors.

   513     * Fix build with openssl 1.0.0 betas.

   514     * Trigger a SSL transmission when reading from the socket. In certain

   515       cases the connection stalled when a buffer limit was used.

   516 

   517 QtOpenGL

   518 --------

   519 

   520  - QGLColormap

   521     * setEntry() was inserting entries instead of replacing them.

   522     * Clarified documentation for isEmpty().

   523 

   524  - QGLContext

   525     * Fix RGB565 mode in bindTexture().

   526     * Map mipmaps work on OpenGL/ES 2.0 systems in bindTexture().

   527     * Improve performance of QGLContext::currentContext().

   528 

   529  - QGLFormat

   530     * Increase unit test coverage and fix some long-standing issues.

   531     * Improve performance of code that tests QGLFormat options.

   532     * operator==() now tests for equality on all fields.

   533 

   534  - QGLFramebufferObject

   535     * Add support for the ARB_framebuffer_object, OES_framebuffer_object,

   536       and OES_packed_depth_stencil extensions.

   537     * Unbind the texture after it is initialized.

   538     * Don't destroy the texture target on cleanup if one wasn't created.

   539 

   540  - QGLFramebufferObjectFormat

   541     * New class for controlling fbo options.

   542 

   543  - Improvements to context sharing and object cleanup logic.

   544 

   545  - QGLGradientCache

   546    * [249919] Clean up the gradient cache in the right context.

   547 

   548  - OpenGL (ES) 2.0 Paint Engine

   549     * Re-written the OpenGL (ES) 2.0 Paint Engine's shader manager to use new

   550       shader API and to allow custom code from E.g. Pixmap Filters to be

   551       instered into the fragment "pipeline".

   552     * Fixed conical gradients.

   553 

   554  - Added a static function, QGL::setPreferredPaintEngine(), to allow users

   555    to set the preferred GL paint engine.

   556 

   557  - Cleaned up usage of OpenGL extensions. QtOpenGL now uses the OpenGL 2.0

   558    names of methods rather than using the EXT postfix. However, when resolving

   559    extensions, QtOpenGL will also try postfixing EXT if the OpenGL 2.0 name is

   560    not found.

   561 

   562  - Fix QGLWidget::showFullscreen() on EGL platforms.

   563 

   564  - Added lots of OpenGL autotests.

   565 

   566 QtScript

   567 --------

   568 

   569  - Many optimizations.

   570  - Improved ECMA script compliance.

   571  - New method, QScriptString::toArrayIndex(), for converting QScriptString

   572    to a QtScript array index.

   573 

   574 QtSql

   575 -----

   576 

   577  - [QTBUG-3162] Views for Sql table models should not reset state on failed

   578    queries.

   579  - [QTBUG-5251] Fix retrieval of SQL 'TIME' information for PostgreSQL.

   580  - Better error checking in case of failed query.

   581  - [QTBUG-5179] Fixed floating point number truncation in qsqlpsql plugin.

   582  - [QTBUG-551] Fixed Oracle batchExec using strings as out params.

   583  - Updated sqlite to 3.6.19 + readded our patches.

   584  - [QTBUG-3736] ODBC: Retrieved in ascii, should be stored in ascii.

   585  - Fixed issue with multiple lookups to same table/field in

   586    QSqlRelationalTableModel.

   587  - Updated documentation of setForwardOnly.

   588  - [QT-754] TDS: Fixed improper formatting of date values.

   589  - TDS: Fixed missing field/table name escaping.

   590  - ODBC: Fixed setForwardOnly not being reset on when the query is reset.

   591  - [QTBUG-4510] Add reconnection option to the mysql driver.

   592  - [222678] Fixed QSqlTableModel: trying to delete the wrong row.

   593  - Interbase: Fixed crash when calling numRows on unknown query type.

   594  - DB2: Don't return an error when the table is just empty.

   595  - [17327] Added OCI support for synonyms to tables created by another user.

   596  - [176267] Fixed mysql driver not knowing the difference between tables and

   597    views.

   598  - Fixed determination of end of ODBC string on deficient drivers.

   599  - Added ability to open sqlite databases readonly.

   600  - Fixed race condition on reopening an ODBC connection.

   601  - Fixed invalid use of statics in the defaultCasing code.

   602  - Fixed proper quoting under odbc.

   603  - [252450 & 246125] Fixed failed queries due to MySql driver auto-preparing.

   604  - QSqlDatabase now has a database level precisionPolicy. Queries now default

   605    to this.

   606  - Add proper iODBC linking support.

   607 

   608 QtSvg

   609 -----

   610 

   611  - QSvgHandler

   612    * [245602] [204686] Fixed gradient and solid-color referencing.

   613    * [202426] Made attribute inheritance work with 'use' tags.

   614    * [250618] Fixed gradient on strokes.

   615    * [254040] Added support for 'vector-effect'.

   616 

   617  - QSvgPaintEngine

   618    * [257052] Changed drawImage() to ignore aspect ratio.

   619 

   620 QtWebKit

   621 --------

   622 

   623  - Many bug fixes.

   624 

   625  - QWebElement

   626    * New class; introduced to implement DOM like operations on a web page.

   627 

   628  - QWebFrame

   629    * New properties for an URL and a focus management.

   630    * New signals delivering current loading status.

   631 

   632  - QWebInspector

   633    * New class for embedding the WebInspector as a QWidget

   634 

   635  - QWebHistory

   636    * Streaming operators for saving and restoring QWebHistory's state.

   637 

   638  - QWebPage

   639    * New property; preferredContentsSize for setting layout of the page in the

   640      viewport.

   641    * New slot; shouldInterruptJavaScript, called when JavaScript program is

   642      running too long.

   643 

   644  - QWebSecurityOrigin:

   645    * New functions for defining local URL schemes.

   646 

   647  - QWebSettings

   648    * New options for text encoding and off-line web application cache (HTML5).

   649 

   650  - QWebView

   651    * Support for render hints.

   652 

   653 QtXml

   654 -----

   655 

   656  - QDomDocument

   657     * Set the codec to UTF-8 if codec not present or unknown.

   658 

   659 QtXmlPatterns

   660 -------------

   661 

   662  - QXmlQuery

   663     * [245219] Added QXmlQuery::setFocus(const QString &focus).

   664 

   665 Qt Plugins

   666 ----------

   667 

   668  - Tiff plugin

   669     * [258526] Rotate the image if the tiff file contains an orientation tag.

   670     * [254317] Add support for mono and indexed format

   671 

   672 Third party components

   673 ----------------------

   674 

   675  - Updated FreeType to version 2.3.9.

   676 

   677  - Updated harfbuzz to the latest version from fd.org.

   678 

   679  - Updated sqlite to version 3.6.19.

   680 

   681  - Updated libpng to version 1.2.40

   682 

   683 

   684 ****************************************************************************

   685 *                      Platform Specific Changes                           *

   686 ****************************************************************************

   687 

   688  - Added support for the Symbian platform with integration for the S60

   689    framework.

   690 

   691  - Added community supported Qt ports for QNX and VxWorks. See platform

   692    notes in the Qt documentation for details.

   693 

   694  - Improved support for AIX using IBM's Visual Age C/C++ compiler

   695    version 7 (xlC).

   696 

   697  - Improved support for Solaris using Sun Studio 12 (CC 5.9).

   698 

   699 Qt for Unix (X11 and Mac OS X)

   700 ------------------------------

   701 

   702  - Added support for thread-safe FD_CLOEXEC file-descriptor creation

   703    where supported by the operating system (currently only Linux).

   704 

   705  - Ensured that system calls where EINTR is a possible result are

   706    properly restarted.

   707 

   708 Qt for Linux/X11

   709 ----------------

   710 

   711  - KDE Integration: Improved the integration into KDE desktop (loading of KDE

   712    palette, usage of KColorDialog and KFileDialog) using the GuiPlatformPlugin

   713 

   714  - Fixed pasting the clipboard content to non-Qt application on X11 when the

   715    requested format is image/ppm.

   716 

   717  - On X11, Qt now supports the _NET_WM_SYNC protocol.

   718 

   719  - On X11, Qt now supports the SAVE_TARGET protocol that allows to keep

   720    clipboard contents if the application that owns the clipboards exits

   721 

   722  - [QTBUG-4652] On X11, clipboard content can be properly retrieved even when

   723    an application asks for the unsupported target. This fixes copying and

   724    pasting data when using Synergy.

   725 

   726  - [MR#797] Fixed a crash when using QX11EmbedContainer/Widget on x86_64.

   727 

   728  - [MR#1111] Emit workAreaResized when _NET_WORKAREA is changed on X11.

   729 

   730  - [QTBUG-3620] Fixed bug on X11 that caused bitmap fonts to become so small

   731    it was unreadable when printed or presented in a print preview widget.

   732 

   733  - Improved EGL integration on X11 (including better visual selection).

   734 

   735  - Made Qt::WA_TranslucentBackground work in combination with native

   736    child widgets.

   737 

   738  - Support Qt::WA_TranslucentBackground on top-level QGLWidgets on X11, both

   739    (EGL & glX). This allows OpenGL (& ES) rendering to semi-transparent widgets

   740    if a compositing window manager is running.

   741 

   742  - Support OpenGL texture_from_pixmap extension on X11 (EGL & glX) when

   743    calling QPainter::drawPixmap() with the OpenGL paint engine, or calling

   744    QGLContext::bindTexture() on an X11 QPixmap. If the

   745    GLX_EXT_texture_from_pixmap or EGL_NOKIA_texture_from_pixmap extensions are

   746    present, Qt will attempt to use glXBindTexImageEXT or eglBindTexImage to

   747    bind the pixmap to a texture, rather than copying the pixel data.

   748 

   749  - Add new experimental QX11GLPixmapData backend for QPixmap. This pixmap

   750    backend uses regular X11 pixmaps to store the image data, however it uses

   751    OpenGL to render into them.

   752 

   753  - Tablet: Disable event compression of events of type QTabletEvent when the

   754    current event is accepted by the receiver.

   755 

   756  - [QTBUG-4242] Fixed a bug that allowed the user to close a window

   757    event though the program is using the QEventLoop::ExcludeUserInputEvents

   758    flag.

   759 

   760  - [255559] Fixed generation of XdndLeave events to include the correct

   761    source id.

   762 

   763  - [258319] Avoid division by zero on some Xlib/Xserver implementations.

   764 

   765  - Fixed the default QWidget size on X servers with Xinerama to give widgets

   766    a default size that should fit on a single screen.

   767 

   768  - Support _NET_WORKAREA on X servers with Xinerama (previously this property

   769    was ignored).

   770 

   771 Qt for Windows

   772 --------------

   773 

   774  - Significant external contribution from Milan Burda for planned removal

   775    of (non-unicode) Windows 9x/ME support.

   776 

   777  - QRegion is no longer a GDI object by default. This means it is no

   778    longer subject to gui-thread only nor does it potentially impact

   779    the 10.000 GDI object limit per process. By explicitly calling

   780    .handle() a GDI object will be created and memory managed by

   781    QRegion. The native handle is for reading out only. Any GDI calls

   782    made on the HRGN handle will not affect the QRegion.

   783 

   784  - The reading code of QLocalSocket on Windows has been rewritten to improve

   785    reading performance.

   786 

   787  - On Windows when a file cannot be accessed (stat()ed), we are now restoring

   788    the error mode to the original value.

   789 

   790  - [259221] QFileInfo::symLinkTarget() now supports NTFS symbolic links

   791    thanks to Konstantin Ritt (merge request 1217).

   792  - [251554] Fixed openUrl("mailto:") with Thunderbird on Windows.

   793  - [254501] QDestopServices now supports cyrillic file names.

   794  - Fixed an issue which prevents moving fixed size windows using titlebar.

   795  - [258087] Fixed an issue on Vista which returns incorrect file paths when

   796    using QFileDialog::getOpenFileNames()

   797  - [253763] Fixed a focus issue when using out-of-process ActiveQt controls.

   798  - [255912] Mouse move events will not be delivered to a blocked widget.

   799  - [225588] Enabled IME reconversion support.

   800 

   801  - Phonon on Windows

   802    * Now much more reliable when reading a file through a QIODevice.

   803    * If Video Mixing Renderer 9 is not available, falls back to software

   804      rendering.

   805    * Fixed a flicker issue when switching source with a transition time of 0.

   806 

   807  - [QTBUG-4445] Fixed bug on Windows that caused problems when printing

   808    text where several characters were represented by a single glyph, e.g.

   809    a double 't' with the Calibri font.

   810 

   811  - Added QSysInfo::WV_WINDOWS7 and QSysInfo::WV_6_1.

   812 

   813  - Changed QPrintDialog under Windows to use PrintDlgEx, instead of the old

   814    deprecated PrintDlg call.

   815 

   816 Qt for Mac OS X

   817 ---------------

   818 

   819  - General changes on Mac OS X:

   820    * Mac OS X version support: Support for 10.3(Panther) has been dropped and

   821      support for 10.6(Snow Leopard) has been added.

   822    * The Cocoa port now supports static linking.

   823    * The Cocoa port now supports the Qt3Support library (with the exception of

   824      Q3FileDialog) to ease the transition from Carbon to Cocoa.

   825    * The Cocoa binary packages are now Intel only (universal i386 and x86_64).

   826    * Snow Leopard notes:

   827      - Gcc 4.2 is used by default. Configure with -platform macx-g++40 to

   828        select 4.0.

   829      - Using the 10.4u SDK requires gcc 4.0.

   830      - Configuring for the Cocoa port (-cocoa) produces 64-bit binaries by

   831        default. Use the -arch flags to override.

   832      - Building for ppc64 is no longer supported by the gcc tool chain.

   833      - Building for ppc is still supported.

   834    * Added support for GetURL events on Mac OS X.

   835 

   836  - General bug fixes:

   837    * [123740] Fixed an issue with dead keys on Mac (cocoa) on French keyboard

   838      layout.

   839    * [258438] Enabled Emacs style keyboard shortcuts.

   840    * [QTBUG-4418] Fixed maximizing and restoring a window.

   841 

   842  - Cocoa bug fixes:

   843    * [252088] Drag Leave events will be delivered correctly on Cocoa.

   844    * [257661] Cocoa now uses the correct line ending for clipboard plain text.

   845    * [258173] Fixed an issue which caused "whatsthis" pointer to flicker.

   846    * Fixed some warnings that might get printed when reparenting QGLWidget.

   847    * Fixed stacking order of modal dialogs so that they never rearrange level,

   848      or hide in the background.

   849    * Fixed problem with plugins written with Qt that closes down the native

   850      application when hiding a modal dialog.

   851    * Fixed problem that native applications cannot quit when using plugins

   852      written with Qt from a native application.

   853    * Fixed problem that the menubar is not restored correctly when using

   854      plugins written with Qt from a native application.

   855    * The event dispatcher now integrates better with native applications that

   856      spin the event loop themselves.

   857    * Using Qt::AA_MacPluginApplication will now disable the use of native

   858      menubars on Mac.

   859    * Sliders and scroll views in Qt now use pixel scrolling for mouse devices

   860      that support this.

   861    * Wheel events can now contain a delta with a value as low as 1 for mouse

   862      devices that use pixel scrolling.

   863 

   864 Qt for Embedded Linux

   865 ---------------------

   866 

   867  - Added QMAKE_LIBS_OPENGL_ES1, QMAKE_LIBS_OPENGL_ES1CL and

   868    QMAKE_LIBS_OPENGL_ES2 qmake variables for specifying OpenGL ES

   869    specific libraries.

   870 

   871  - Compilation fixes for OpenGL/ES 1.0 and OpenGL/ES 1.1 Common Lite.

   872 

   873  - Phonon on Windows

   874    * Now much more reliable when reading a file through a QIODevice.

   875    * If Video Mixing Renderer 9 is not available, falls back to software

   876      rendering.

   877    * Fixed a flicker issue when switching source with a transition time of 0

   878 

   879  - [QTBUG-3620] Fixed bug on X11 that caused bitmap fonts to become so small

   880    it was unreadable when printed or presented in a print preview widget.

   881 

   882  - [QTBUG-4445] Fixed bug on Windows that caused problems when printing

   883    text where several characters were represented by a single glyph, e.g.

   884    a double 't' with the Calibri font.

   885 

   886  - EGL and OpenGL/ES

   887    * Protect the use of version-specific EGL symbols with #ifdef's.

   888    * Make sure an EGL context is current when resolving GL extensions.

   889    * Introduce "lazyDoneCurrent" for optimizing context switching in

   890      paint engines.

   891    * Separate EGLSurface from QEglContext so that the same context can

   892      be used with multiple surfaces.

   893    * Move common functions from system-specific files to qgl_egl.cpp.

   894    * Fix a memory leak of EGLSurface's in QGLContext.

   895    * Fix detection of pbuffers on OpenGL/ES systems.

   896    * EGL_SAMPLES was being set to the wrong value for multisampled surfaces.

   897 

   898  - PowerVR

   899    * Make the code better at detecting MBX vs SGX header files.

   900    * Fix 32-bit screen support - some code was still assuming 16-bit.

   901    * Stop GL window surfaces double-flushing their contents.

   902    * Remove surface holder, which never worked all that well.

   903    * Implement screen rotations.

   904 

   905  - Mouse and keyboard drivers

   906    * Removed obsolete drivers (vr41xx, yopy, sl5000, bus mouse).

   907    * Added a new LinuxInput driver for both mouse and keyboard.

   908    * Added keymap support for QWS via standard Linux .kmap files.

   909      (complete with dead-keys, compose-key and LED handling).

   910 

   911  - Remove obsolete OpenGL/ES screen drivers: hybrid, ahigl.

   912 

   913  - Send enter/leave events also to child widgets.

   914 

   915  - Fix crash when instantiating multiple QApplications.

   916 

   917  - Optimize software cursor by using native image format instead of 8-bit.

   918 

   919  - [255828] Avoid window decoration flicker on show.

   920 

   921  - [255495] Fix blend function crash on AVR32.

   922 

   923  - Fix qconfig configurations.

   924 

   925  - Add powerpc mkspec and remove "empty" ppc mkspec .

   926 

   927 DirectFB

   928 --------

   929 

   930  - When running Qt/DirectFB the DirectFB window id of a top level QWidget can

   931    be queried using property("_q_DirectFBWindowID")

   932 

   933  - Allow setting the background color of the primary layer in DirectFB with

   934    connect options. QWS_DISPLAY=directfb:bgcolor=red or

   935    QWS_DISPLAY=directfb:bgcolor=\#aabbccdd

   936 

   937  - Add support for rendering mouse cursor using a top level window when cursor

   938    support is not working in IDirectFBDisplayLayer. Define

   939    QT_DIRECTFB_WINDOW_AS_CURSOR to enable.

   940 

   941  - Add experimental support for optimized locking/unlocking of surfaces. Enable

   942    by defining QT_DIRECTFB_SUBSURFACE.

   943 

   944  - Fix a bug to conceptually allow using QDirectFBScreen as a subscreen of a

   945    proxy screen. Don't make QDirectFBScreen::instance() assume that

   946    QScreen::instance() is a QDirectFBScreen.

   947 

   948  - Optimize move/resize operations with DirectFB. With a properly configured

   949    DirectFB these operations are handled for us and we don't need to force a

   950    repaint of the window.

   951 

   952  - Support top level window opacity in DirectFB

   953 

   954  - Fix a bug when loading RGB32 images that would lead to rendering issues.

   955 

   956  - Fix a bug when painting with invalid pens/brushes.

   957 

   958  - Fix a bug that would show up when QWidget::scroll is called.

   959 

   960  - Implement support for loading pixmaps using IDirectFBImageProvider.

   961 

   962  - Disable color table support by default. This seems to work incorrectly on

   963    most boards and loading these images will generally require an image

   964    conversion anyway.

   965 

   966  - Fix a crash when resizing windows.

   967 

   968  - Compile with versions < 1.0. We still recommend using newer versions.

   969 

   970  - Considerable code cleanup

   971 

   972  - Various optimizations regarding painting, loading of images and creation of

   973    surfaces.

   974 

   975  - Allow forcibly falling back to raster engine for painting operations by

   976    exporting QT_DIRECTFB_FORCE_RASTER=1

   977 

   978  - Reenable support for RGB32 primary surface.

   979 

   980 

   981 Qt for Windows CE

   982 -----------------

   983 

   984  - On Windows CE the link time code generation has been disabled by default to

   985    be consistent with win32-msvc200x.

   986  - The default button size has been reduced in the Windows mobile style.

   987  - [QTBUG-3613] QWizard issues have been fixed on Windows mobile.

   988  - [254673] Restoring minimized widgets fixed for Windows mobile and

   989    Windows CE.

   990  - [255242] Seeking within large files (bigger than 0x80000000 bytes) fixed

   991    on Windows CE.

   992  - [257352] When configuring Qt for Windows CE, configure points the user to

   993    setcepaths, when its done.

   994  - [259850] Added a makespec template for Windows CE 6.

   995  - Fixed the hardcoded GL library names for Windows CE.

   996 

   997 ****************************************************************************

   998 *                          Tools                                           *

   999 ****************************************************************************

  1000 

  1001  - Designer

  1002    * [233683] Promoted Widgets are now stored correctly in scratchpad.

  1003    * [249823] Added search functionality to the resource browser.

  1004    * [254282] Enabled the use of promoted widgets in form templates.

  1005    * [254824] Made it possible to override the createAction()/createWidget()

  1006      functions of QUiLoader.

  1007    * [256332] Enabled deleting all pages of a QTabWidget or QStackedWidget.

  1008    * [259238] Fixed menubar/menu editing in right-to-left mode.

  1009    * [259918] Fixed setting of object names for container pages not to use

  1010      localized strings.

  1011    * [260658] Fixed saving of alpha values set in the palette editor.

  1012    * It is now possible to further specify the kind of custom widget string

  1013      properties using XML tags.

  1014 

  1015  - uic

  1016    * [260784] Generated code for retranslateUi doesn't cause compiler warnings

  1017      anymore.

  1018 

  1019  - uic3

  1020    * [128859] Fixed code generation of QLabel's wordWrap property.

  1021 

  1022  - qdoc3

  1023    * Changed qdoc3 binary to be in bin/ instead of a platform specific location.

  1024 

  1025  - Linguist

  1026    * Linguist GUI: Experimental support for editing multi-length strings.

  1027    * lupdate is now again the only tool which can parse program code.

  1028    * lupdate

  1029      - Actually guess the target language from the file name.

  1030      - Make -{source,target}-language actually override values from files.

  1031      - C++ parser

  1032        * Properly support "using namespace", etc.

  1033        * Remove the obsolete TRANSLATOR hack relating to "using namespace".

  1034        * Support attaching meta data to translatable message.

  1035        * Actually use the argument of Q_DECLARE_TR_FUNCTION.

  1036        * Optimization.

  1037        * Bug fixes and robustness improvements.

  1038    * lrelease

  1039      - Add -markuntranslated <prefix> option.

  1040    * Both lupdate & lrelease

  1041      - Accuracy improvements of the qmake .pro file parser.

  1042      - Support for ID-based translations. Somewhat experimental.

  1043    * lconvert

  1044      - Add --sort-contexts option.

  1045      - Add --locations option (complementing lupdate).

  1046      - Add --no-ui-lines option (complementing lupdate).

  1047 

  1048 

  1049 ****************************************************************************

  1050 * Important Behavior Changes *

  1051 ****************************************************************************

  1052 

  1053  - The experimental Direct3D paint engine has been removed. The reason for

  1054    this is that Nokia focuses on OpenGL for desktop hardware accelerated

  1055    rendering.

  1056 

  1057  - The default engine used to draw onto OpenGL buffers has changed in

  1058    Qt 4.6. The QPaintEngine::OpenGL2 engine is now used as the default

  1059    engine. This *may* cause compatibility problems for applications

  1060    that use a mix of QPainter and native OpenGL calls to draw into a GL

  1061    buffer. Use the QGL::setPreferredPaintEngine() function to enforce

  1062    usage of the old GL paint engine.

  1063 

  1064  - When mixing OpenGL and QPainter calls you need to surround your

  1065    custom OpenGL calls with QPainter::beginNativePainting() and

  1066    QPainter::endNativePainting().

  1067    This is to ensure that the paint engine flushes any pending drawing and sets

  1068    up the GL modelview/projection matrices properly before you can issue custom

  1069    OpenGL calls, and to let the paint engine synchronize to the painter state

  1070    before resuming regular QPainter based drawing.

  1071 

  1072  - Graphics View has undergone heavy optimization work, and as a result of

  1073    this work, the following behavior changes were introduced.

  1074 

  1075    a) QStyleOptionGraphicsItem::exposedRect now contains the item's bounding

  1076       rectangle, and QStyleOptionGraphicsItem::matrix is uninitialized by

  1077       default. You can enable an exact exposed rectangle and a correct matrix

  1078       by enabling the flag QGraphicsItem::ItemUsesExtendedStyleOptions.

  1079 

  1080    b) QStyleOptionGraphicsItem::levelOfDetails is obsoleted and its value is

  1081       always initialized to 1. Instead you can call

  1082       QStyleOptionGraphicsItem::levelOfDetailFromTransform(const QTransform &)

  1083       to determine the level of detail.

  1084 

  1085    c) QGraphicsView no longer calls QGraphicsView::drawItems(), and in turn

  1086       QGraphicsScene::drawItems(), by default. You can get the old behavior

  1087       back by enabling QGraphicsView::IndirectPainting.

  1088 

  1089    d) QGraphicsItem no longer calls itemChange() for position and

  1090       transformation changes. If you want to receive notifications for changes

  1091       to the item's position and transformation, you can set the flag

  1092       QGraphicsItem::ItemSendsGeometryChanges (which is enabled by default by

  1093       QGraphicsWidget and QGraphicsProxyWidget).

  1094 

  1095  - QDesktopWidget on X11 no longer emits the resized(int) signal when screens

  1096    are added or removed. This was not done on other platforms. Use the

  1097    screenCountChanged signal instead.

  1098 

  1099  - QUrl's parser is more strict when for hostnames in URLs. QUrl now

  1100    enforces STD 3 rules:

  1101 

  1102     * each individual hostname section (between dots) must be at most

  1103       63 ASCII characters in length;

  1104 

  1105     * only letters, digits, and the hyphen character are allowed in the

  1106       ASCII range; letters outside the ASCII range follow the normal

  1107       IDN rules

  1108 

  1109    That means QUrl no longer accepts some URLs that were invalid

  1110    before, but weren't interpreted as such.

  1111 

  1112  - The Unix configure-time check for STL is stricter now in Qt

  1113    4.6. This means some legacy STL implementations may fail to pass

  1114    the test and, therefore, Qt will automatically disable STL support.

  1115 

  1116    This is a binary-compatible change: existing code will continue to

  1117    work without being recompiled. However, it affects the source code,

  1118    since some STL-compatibility API will not be enabled.

  1119 

  1120    Platforms affected by this change:

  1121      * solaris-cc-* with the default (Cstd) C++ STL library

  1122        recommendation: use -library=stlport4

  1123        See Sun Studio's documentation for the effects of this option

  1124 

  1125  - QVariant has now a new implicit constructor that takes a float. This

  1126    means that code that assigned a float to a variant would create a

  1127    variant with userType QMetaType::Float, instead of QVariant::Double.

  1128 

  1129  - QDataStream will now read and write all floating point numbers with the

  1130    same precision, regardless of whether it's streamed into or out from a

  1131    float or double. This is to maintain compatibility across platforms with

  1132    a different default precision for qreal. The default is 64-bit precision

  1133    for all floating point numbers, and this can be changed using the new

  1134    function setFloatingPointPrecision(). Set Qt_4_5 as the version of the

  1135    QDataStream to get the behavior of previous versions.