Qt 4.7 introduces many new features and improvements as well as bugfixes

over the 4.6.x series. For more details, refer to the online documentation

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

  http://qt.nokia.com/doc/4.7

The Qt version 4.7 series is binary compatible with the 4.6.x series.

Applications compiled for 4.6 will continue to run with 4.7.

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

corresponding to tasks in the Qt Bug Tracker:

  http://bugreports.qt.nokia.com/

Each of these identifiers can be entered in the bug tracker to obtain more

information about a particular change.

****************************************************************************

*                           General                                        *

****************************************************************************

General Improvements

--------------------

- Documentation and Examples

- Support for the GL_EXT_geometry_shader4, aka Geometry Shaders, was added

  to QGLShaderProgram.

New features

------------

 - QNetworkSession, QNetworkConfiguration, QNetworkConfigurationManager

    * New bearer management classes added.

 - QStaticText class was added to support high-performance output of 

   seldomly altered text. 

Third party components

----------------------

 - Updated libpng to version 1.4.0

 - Updated libjpeg to version 8

 - Updated libtiff to version 3.9.2

****************************************************************************

*                          Library                                         *

****************************************************************************

QtCore

------

 - QString

    * Added QString(const QChar *) constructor.

      NOTE: This is source-incompatible for the bogus QString(0) case.

    * Removed internal but exported qt_winQString2MB() and qt_winMB2QString()

    * Added setRawData() function (also revived the one in QByteArray)

    * Various performance improvements

 - QList

    * Added reserve() function

    * Various performance improvements

 - QMetaType

    * Significantly improved performance of the type() function

    * [QTBUG-8235] Support QEasingCurve as a built in metatype.

    * Added possibility to register several name for the same type with

      qRegisterMetaType<>() (ie. for typedef)

 - QState

    * [QTBUG-7741] Added a function to get the out-going transitions

 - QXmlStreamReader

    * [QTBUG-9196] fixed crash when parsing

 - QTimer

    * singleShot with 0 timeout will now avoid allocating objects

 - QAbstractAnimation

    * [QTBUG-10654] Avoids animation with loopCount == 0 to change state

      to running and stopped.

 - QVarLenghtArray

    * Added some API to be more consistant with other containers

QtGui

-----

 - QAbstractItemView

    * Fixed a bug that would cause keyboard searches not to behave

      properly when used within 400 milliseconds of midnight.

 - QComboBox

    * [QTBUG-8796] Made ForegroundRole work for all styles.

 - QPrinter

    * Obsoleted the slightly confusing setNumCopies() and numCopies()

      functions, and replaced them with setCopyCount(), copyCount() and

      supportsMultipleCopies().

 - QPrintDialog/QPrinter

    * Added support for printing the current page.

 - QCommonStyle

    * Fixed a bug that led to missing text pixels in QTabBar when using

      small font sizes. (QTBUG-7137)

 - QGraphicsEffect

    * Fixed rendering bugs when scrolling graphics items with drop

      shadows.

 - QGraphicsItem

    * [QTBUG-8112] itemChange() is now called when transformation

      properties change (setRotation, setScale, setTransformOriginPoint).

    * [QTBUG-9024] Improved performance when calling update() on items that

      are clipped by an ancestor (QGraphicsItem::ItemClipsChildrenToShape).

    * [QTBUG-7703], [QTBUG-8378] Fixed scrolling issues

    * [QTBUG-12112] Fixed focusItem() returning incorrect value.

 - QGraphicsTextItem

    * [QTBUG-7333] Fixed keyboard shortcuts not being triggered when the

      the item has focus and something else has the same shortcut sequence.

    * [QTBUG-10574] Fixed crash when flag "QGraphicsItem::ItemIgnoresTransformations"

      is set.

 - QGraphicsView

    * [QTBUG-7438] Fixed viewport cursor getting reset when releasing

      the mouse.

    * [QTBUG-10338] Fixed drawing artifacts due to rounding errors.

 - QGraphicsWidget

    * [QTBUG-12056] Fixed a crash occuring when adding a QGraphicsWidget

      to a scene after removing and deleting another QGraphicsWidget.

 - QImage

    * [QTBUG-9640] Prevented unneccessary copy in QImage::setAlphaChannel().

    * [QTBUG-7982] Added QImage::bitPlaneCount().

    * [QTBUG-9072] Fixed alpha check for 1-bit-per-pixel images.

 - QPicture

    * [QTBUG-4974] Printing QPictures containing text to a high resolution

      QPrinter would in many cases cause incorrect character spacing.

 - QPainter

    * Added QPainter::drawPixmapFragments(), which makes it possible to draw

      pixmaps, or sub-rectangles of pixmaps, at various positions with

      different scale, opacity and rotation.

    * [QTBUG-10018] Fixed image drawing inconsistencies when drawing

      1x1 source rects with rotating / shear / perspective transforms.

    * Optimized various blending and rendering operations for ARM

      processors with a NEON vector unit.

    * Fixed some performance issues when drawing sub-pixmaps of large

      pixmaps and falling back to raster in the X11 paint engine.

    * [QTBUG-7596] Safeguard ourselves against corrupt registry values for

      ClearType gamma on Windows.

    * [QTBUG-9218] Fixed flattening of largely scaled, thin, dashed beziers.

    * [QTBUG-9437] Fixed crash in the raster paint engine when drawing largely

      scaled images.

 - QPainterPath

    * [QTBUG-3778] Fixed bug in painter path polygon intersection code.

    * [QTBUG-7396] Optimized painter path intersections for when at

      least one of the paths is a rectangle by special casing.

    * [QTBUG-8035] Got rid of bezier intersection code in the boolean

      operators (intersect, subtract, unite) to prevent numerical

      stability issues.

    * [QTBUG-11291] Fixed infinite recursion when drawing very large painter

      paths.

 - QPixmap

    * [QTBUG-4149] Fixed QPixmap::grabWidget() on widgets that have not yet

      been shown.

 - QPlastiqueStyle

    * [QTBUG-6516] Respect AlternateBase role for list views.

 - QRegion

    * [QTBUG-7699] Fixed crash caused by large x-coordinates.

 - QSplitter

    * [QTBUG-9335] Improve support for 1-pixel splitters by using a 

      larger drag area.

 - QTextDocumentWriter

    * Fixed tab-stops and table padding in ODF export.

 - QTextLayout

    * [QTBUG-11427] Fix possible crash in QTextLayout for glyphless 

      items.

    * [QTBUG-8864] Fix regression in right alignment of text with 

      negative right bearing.

 - QTransform

    * [QTBUG-8557] Fixed bug in QTransform::type() potentially occuring

      after using operator/ or operator* or their overloads.

QtOpenGL

--------

 - Improve performance of text by adding special cased fragment shader.

 - Made width and height of glyph cache power-of-two for performance 

   improvements on some hardware.

 - [QTBUG-9706] Improved appearance of text antialiasing.

 - QTreeView

    * Optimized

QtNetwork

---------

 - QHostInfo: Added a small 60 second DNS cache

 - QNetworkAccessManager

  * Performance improvements for file:// and http://

  * Crash fixes

  * Improvements on HTTP pipelining

  * Fix problem with canReadLine()

  * Fix problem with HTTP 100 reply

  * Some new attributes for QNetworkRequest

  * [QTBUG-8206] add method to send custom requests

  * [QTBUG-9618] [MR 2372] send secure cookies only over secure connections

  * [QTBUG-7713] Fix bug related to re-sending request

  * [QTBUG-7673] Fix issue with some webservers

 - Sockets

  * Better support for derived QTcpServer

  * [QTBUG-7054] Fix error handling with waitFor*() for socket engine

  * [QTBUG-7316, QTBUG-7317] Also handle unknown errors from socket engine

 - SSL

  * [QTBUG-2515] Do not make OpenSSL prompt for a password

  * [QTBUG-6504, QTBUG-8924, QTBUG-5645] Fix memleak

QtScript

--------

 - Updated src/3rdparty/javascriptcore to a more recent version

 - Significantly improved performance of the Qt/C++<-->JavaScript bridge

 - QScriptValueIterator: Significantly improved performance

 - [QTBUG-3637] Added a wrap option for excluding slots from a QObject binding

 - [QTBUG-6238] Added a function for reporting additional memory cost

 - [QTBUG-6908] Significantly improved performance of qsTr()

QtSvg

-----

 - QSvgRenderer

  * [QTBUG-8264] Fixed rounded rectangles when 'rx' or 'ry' is zero.

  * [QTBUG-10022] Fixed assert failure when loading an invalid SVG.

QtXmlPatterns

-------------

 - [QTBUG-8920] fixed crash with anonymous types in XsdSchemaChecker

 - [QTBUG-8394] include/import/redefine schemas only once

 - QXmlSchema: fix crash with referencing elements

Qt Plugins

----------

 - Jpeg image IO plugin

    * Fixed failure to store certain QImage formats as jpeg (QTBUG-7780)

    * Optimized smoothscaling

    * Optimized to avoid data copy when reading from memory device (QTBUG-9095)

 - SVG image IO plugin

    * Added support for svgz format (QTBUG-8227)

    * Fixed canRead() so that it can be used also for non-sequential

      devices. (QTBUG-9053)

    * Added support for clipping and scaling and backgroundcolor

    * Optimized to avoid data copy when reading from memory device (QTBUG-9095)

****************************************************************************

*                          Database Drivers                                *

****************************************************************************

 - Sqlite

   * [QTBUG-11904] Pointer aliasing problem in sqlite

 - OCI

   * [QTBUG-10919] Unable to insert unicode chars with codepoint > 255 

     in nvarchar2 column on oracle

   * [QTBUG-8210] Oracle - DATE in db with a year greater or equal to 2800 

     returns an invalid date

****************************************************************************

*                      Platform Specific Changes                           *

****************************************************************************

Qt for Linux/X11

----------------

 - QGtkStyle

    * Fixed rtl issues with sliders (QTBUG-8986)

 - QFontDatabase

    * [QTBUG-4428] Fixed regression when using bitmap fonts on some 

      Linux systems.

 - QFontEngine

     * [QTBUG-9442] Avoid possible square root of negative number in 

      FreeType font engine.

 - QFontMetrics

    * [QTBUG-10448] Fix crash when using fonts in non-gui QApplication.

Qt for Windows

--------------

 - Popup windows now implicitly activate when shown. (QTBUG-7386)

 - QLocalSocket

    * Pipe handle leak fixed, when closing a QLocalSocket that still has

      unwritten data. (QTBUG-7815)

    * Fixed closing state for local sockets with unwritten data. (QTBUG-9681)

    * Improved performance of writing to QLocalSocket.

Qt for Mac OS X

---------------

 - QMacStyle

    * Removed frame around statusbar items. (QTBUG-3574)

 - QFontEngine	

    * Enable fractional metrics for the font engine on Mac in all 

      stages of text layout.

    * [QTBUG-5529] Enable design metrics for correct character spacing 

      in ATSUI font engine. (Mac/Carbon)

- QTextDocument

    * [QTBUG-8791] Fix misalignment of fixed width fonts between 

      format changes on Cocoa.

 - QTextLayout

    * [QTBUG-9879] Fix off-by-one in vertical position for elided and 

	  non-elided text.

Qt for Embedded Linux

---------------------

  * Add support for WA_TranslucentBackground (QTBUG-5739)

  * Add support for QFont::NoAntialias (QTBUG-5936)

Qt for Windows CE

-----------------

 - Core changes

    * Fixed menu handling on Windows mobile. (QTBUG-8754)

    * Fixed a crash when receiving a certain type of WM_SETTINGSCHANGE

      message. (QTBUG-7943)

 - QWindowsMobileStyle

    * Huge performance penalty for QTabWidget fixed for

      Windows mobile 6.5. (QTBUG-8419)

    * QTabBar scroll button size has been fixed. (QTBUG-8757)

    * Detection of Windows mobile 6.5 fixed. (QTBUG-8418)

****************************************************************************

*                      Compiler Specific Changes                           *

****************************************************************************

****************************************************************************

*                          Tools                                           *

****************************************************************************

- Build System

- Assistant

- Designer

 - [QTBUG-9351] Fixed a bug that caused modified headerview-properties

   of item views to be duplicated in the UI-file.

 - [QTBUG-8347] Fixed a layout problem caused by embedded images in the rich

   text of a QLabel.

 - [QTBUG-8041], [QTBUG-8213] Fixed a crash related to undo while moving

   widgets by arrow keys.

 - [QTBUG-7822] Added support for the 'windowOpacity'-property.

 - [QTBUG-7764] Fixed the emission of the propertyChanged()-signal of

   QDesignerPropertyEditorInterface.

 - [QTBUG-5492] Made widgetbox-filter match on class names, too.

- Linguist

  * The GNU gettext PO format support has been improved

- rcc

- moc

  * Fixed several parsing bugs. Including changes in the normalized signature.

- uic

- uic3

 - [QTBUG-9207] Fixed export of image files of type XPM, added

   compatibility option -limit-xpm-linelength.

- qmake

  * Removed remainder of tmake compatibility

  * Removed remainder of mac9 mode

  * Removed MSVC6 generator

  * Removed makespecs for MSVC.NET and MSVC2002

  * Deprecated -win32/-unix/-macx options, following various cleanups

    relating to platform support. Cross-building makespecs should now

    specify a TARGET_PLATFORM.

  * Started to warn about use of various constructs:

    - non-lowercased replace $$function() calls

    - deprecated variables

    - unescaped backslashes.

      NOTE: You should use UNIX path separators where possible. qmake

      will warn about unnecessary Windows path separators in the future.

  * Removed expansion of qmake- & environment variables in some unexpected

    cases (double expansions, command line options, etc.)

  * Removed splitting at semicolons of literal values which were assigned

    directly to INCLUDEPATH and DEPENDPATH

  * Removed UNIX-specific exporting of all qmake variables to the environment

    of subprocesses invoked via system(). You should put specific assignments

    into the invoked shell command instead.

  * Started to short-cut evaluation inside if() tests, consistently with

    evaluation outside if().

  * Added possibility to request project recursion from within a PRO file

- configure

- qtconfig

- qt3to4

****************************************************************************

*                          Plugins                                         *

****************************************************************************

****************************************************************************

*                   Important Behavior Changes                             *

****************************************************************************

QtScript: Changes due to updating src/3rdparty/javascriptcore:

 - It is no longer possible to delete an undeletable property from C++

   using QScriptValue::setProperty().

 - The QScriptEngineAgent::positionChange() callback will always report

   a column number of 1.

 - QScriptValueIterator will include the "length" property when iterating

   over Array objects.

QtCore:

  - QChar no longer carries the Q_PACKED tag on ARM. This flag was

    used to allow proper alignment of QChar on 2 bytes on older ARM

    ABIs, but it also allowed for unaligned access. Qt never generates

    or uses unaligned access and the new EABI aligns as expected, so

    the flag was removed.

QtNetwork:

  - Qt does no longer provide its own CA bundle, but uses system APIs for