path: root/dist/changes-4.7.0

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.

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.
 - 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.

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

 - 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.

 - QImage
    * [QTBUG-9640] Prevented unneccessary copy in QImage::setAlphaChannel().
    * [QTBUG-7982] Added QImage::bitPlaneCount().

 - 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.

 - 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.

 - 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.

 - QTransform
    * [QTBUG-8557] Fixed bug in QTransform::type() potentially occuring
      after using operator/ or operator* or their overloads.

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


****************************************************************************
*                      Platform Specific Changes                           *
****************************************************************************

Qt for Linux/X11
----------------
 - QGtkStyle
    * Fixed rtl issues with sliders (QTBUG-8986)
    * Fixed missing pressed appearance on scroll bar handles. (QTBUG-10396)  

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)
    * More native appearance of item view headers and frames. (QTBUG-10047)    

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

  - "configure -fast" on Windows now also works for other make tools than
    nmake. (QTBUG-8562)

- 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


- 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.