--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/dist/changes-4.6.0 Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,145 @@
+Qt 4.6 introduces many new features and improvements as well as bugfixes
+over the 4.5.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/4.6
+
+The Qt version 4.6 series is binary compatible with the 4.5.x series.
+Applications compiled for 4.5 will continue to run with 4.6.
+
+Some of the changes listed in this file include issue tracking numbers
+corresponding to tasks in the Task Tracker:
+
+ http://qt.nokia.com/developer/task-tracker
+
+Each of these identifiers can be entered in the task tracker to obtain more
+information about a particular change.
+
+****************************************************************************
+* General *
+****************************************************************************
+
+ - QtDBus
+ * The minimum required version of the D-Bus reference library is
+ now 0.93.
+
+
+****************************************************************************
+* Library *
+****************************************************************************
+
+ * [245219] Added QXmlQuery::setFocus(const QString &focus);
+
+ - QVariant
+ * Many optimisations
+ * Added QVariant::toFloat() and QVariant::toReal()
+ * Added QVariant(float) constructor
+
+****************************************************************************
+* Platform Specific Changes *
+****************************************************************************
+
+ - Significant external contribution from Milan Burda for planned removal
+ of (non-unicode) Windows 9x/ME support.
+
+ - QRegion is no longer a GDI object by default. This means it is no
+ longer subject to gui-thread only nor does it potentially impact
+ the 10.000 GDI object limit per process. By explicitly calling
+ .handle() a GDI object will be created and memory managed by
+ QRegion. The native handle is for reading out only. Any GDI calls
+ made on the HRGN handle will not affect the QRegion.
+
+ - [259221] QFileInfo::symLinkTarget() now supports NTFS symbolic links
+ thanks to Konstantin Ritt (merge request 1217).
+
+ - The reading code of QLocalSocket on Windows has been rewritten to improve
+ reading performance.
+
+****************************************************************************
+* Important Behavior Changes *
+****************************************************************************
+
+ - The experimental Direct3D paint engine has been removed. The reason for
+ this is that Nokia focuses on OpenGL for desktop hardware accelerated
+ rendering.
+
+ - The default engine used to draw onto OpenGL buffers has changed in
+ Qt 4.6. The QPaintEngine::OpenGL2 engine is now used as the default
+ engine. This *may* cause compatibility problems for applications
+ that use a mix of QPainter and native OpenGL calls to draw into a GL
+ buffer. Use the QGL::setPreferredPaintEngine() function to enforce
+ usage of the old GL paint engine.
+
+ - When mixing OpenGL and QPainter calls you need to surround your
+ custom OpenGL calls with QPainter::beginNativePainting() and
+ QPainter::endNativePainting().
+ This is to ensure that the paint engine flushes any pending drawing and sets
+ up the GL modelview/projection matrices properly before you can issue custom
+ OpenGL calls, and to let the paint engine synchronize to the painter state
+ before resuming regular QPainter based drawing.
+
+ - Graphics View has undergone heavy optimization work, and as a result of
+ this work, the following behavior changes were introduced.
+
+ a) QStyleOptionGraphicsItem::exposedRect now contains the item's bounding
+ rectangle, and QStyleOptionGraphicsItem::matrix is uninitialized by
+ default. You can enable an exact exposed rectangle and a correct matrix
+ by enabling the flag QGraphicsItem::ItemUsesExtendedStyleOptions.
+
+ b) QStyleOptionGraphicsItem::levelOfDetails is obsoleted and its value is
+ always initialized to 1. Instead you can call
+ QStyleOptionGraphicsItem::levelOfDetailFromTransform(const QTransform &)
+ to determine the level of detail.
+
+ c) QGraphicsView no longer calls QGraphicsView::drawItems(), and in turn
+ QGraphicsScene::drawItems(), by default. You can get the old behavior
+ back by enabling QGraphicsView::IndirectPainting.
+
+ d) QGraphicsItem no longer calls itemChange() for position and
+ transformation changes. If you want to receive notifications for changes
+ to the item's position and transformation, you can set the flag
+ QGraphicsItem::ItemSendsGeometryChanges (which is enabled by default by
+ QGraphicsWidget and QGraphicsProxyWidget).
+
+ - QDesktopWidget on X11 no longer emits the resized(int) signal when screens
+ are added or removed. This was not done on other platforms. Use the
+ screenCountChanged signal instead
+
+ - QUrl's parser is more strict when for hostnames in URLs. QUrl now
+ enforces STD 3 rules:
+
+ * each individual hostname section (between dots) must be at most
+ 63 ASCII characters in length;
+
+ * only letters, digits, and the hyphen character are allowed in the
+ ASCII range; letters outside the ASCII range follow the normal
+ IDN rules
+
+ That means QUrl no longer accepts some URLs that were invalid
+ before, but weren't interpreted as such.
+
+ - The Unix configure-time check for STL is stricter now in Qt
+ 4.6.0. This means some legacy STL implementations may fail to pass
+ the test and, therefore, Qt will automatically disable STL support.
+
+ This is a binary-compatible change: existing code will continue to
+ work without being recompiled. However, it affects the source code,
+ since some STL-compatibility API will not be enabled.
+
+ Platforms affected by this change:
+ * solaris-cc-* with the default (Cstd) C++ STL library
+ recommendation: use -library=stlport4
+ See Sun Studio's documentation for the effects of this option
+
+ - QVariant has now a new implicit constructor that takes a float. This
+ means that code that assigned a float to a variant would create a
+ variant with userType QMetaType::Float, instead of QVariant::Double.
+
+ - QDataStream will now read and write all floating point numbers with the
+ same precision, regardless of whether it's streamed into or out from a
+ float or double. This is to maintain compatibility across platforms with
+ a different default precision for qreal. The default is 64-bit precision
+ for all floating point numbers, and this can be changed using the new
+ function setFloatingPointPrecision(). Set Qt_4_5 as the version of the
+ QDataStream to get the behavior of previous versions.
+