Qt 4.5.1 is a bug-fix release. It maintains both forward and backward

compatibility (source and binary) with Qt 4.5.0.  For more details,

refer to the online documentation included in this distribution. The

documentation is also available online:

  http://qt.nokia.com/doc/4.5

The Qt version 4.5 series is binary compatible with the 4.4.x series.

Applications compiled for 4.4 will continue to run with 4.5.

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                                        *

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

General Improvements

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

- Documentation and Examples

   * Added printing feature for the Spreadsheet demo.

   * [245675] Clarified the differences between QItemDelegate and

     QStyledItemDelegate.

   * [248752] Marked QPrintDialog::printer(), setPrinter() and addButton()

     as Unix only functions, part of Qt3Support.

- Embedded Dialogs demo

   * [246517] Fixed warnings and bugs in hover handling on Mac OS X

Optimizations

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

- Graphics View Framework has been optimized in several areas

   * Improved the performance of QGraphicsItem::clipPath().

   * Improved the performance of QGraphicsItem::setPos().

   * Improved the performance of QGraphicsItem::effectiveOpacity().

   * Improved the performance of QGrahicsScene::items(*).

   * Improved handling of updates.

   * Reduced the number of floating point operations.

   * Reduced QVariant overhead.

Third party components

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

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

*                          Library                                         *

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

- QAbstractItemModel

   * Clarified some warning messages printed if the model is invalid.

- QAbstractEventDispatcher

   * [248805] Duplicate timerids could occur if a timer is running while the

     QObject is moved to another thread, stopping timers from working.

- QAbstractSocket

   * [192037] Emit the disconnected signal only if we were connected before.

- QAccessible

   * [221731] Fixed a bug where the accessibility plugin could crash if

     there was an "&" at the end or spin forever if a label had a sequence of

     "&&".

   * [241161] Fixed a bug in browsing menus with the keyboard.

- QAtomicInt

   * [216492] Fixed compilation on 64-bit PowerPC machines with gcc 4.3.

- QAuthenticator

   * [237979] Fixed implementation of md5-sess.

- QByteArray

   * [246233] QByteArray::fromHex() fails with input of size 1.

- QColorDialog

   * [247349] Fixed a bug causing the wrong alpha value to be returned.

- QCombobox

   * [248094] Fixed scrollbar from appearing when not required.

- QCompleter

   * [246056] Fixed an assertion failure in setCompletionPrefix().

   * [250064] Fixed a regression in focus policy propagation.

- QtConcurrent

   * [244718] Reduced the number of calls to QThread::idealThreadCount().

- QDirIterator

   * [247645] Fixed a bug that may loose all cached data inside QFileInfo.

- QFile

   * [244485] Renaming a file does not change QFile::fileName().

   * [244500] QFile::rename() does not always return false when the method

     fails

- QFileInfo

   * [205244] Return valid file info also for relative UNC paths.

- QFileDialog

   * [221323] Fixed a bug in QFileDialog's programmatical file selection.

   * [248332] QFileDialog is slow after visiting a large directory.

   * [250194] Fixed an issue with QFileDialog and QSortFilterProxyModel

     index mapping.

- QGLFramebufferObject

   * Framebuffer object extension resolution now works with OpenGL/ES 2.0.

- QGraphicsItem

   * Fixed a slow down regression in QGraphicsItem::ItemCoordinateCache.

   * [247890] Cached QGraphicsItems are not updated if update() is called

     when they are hidden.

   * [250272] Fixed a crash that could occur when an item is deleted but

     it does not get removed from the sceneeventfilters.

- QGraphicsGridLayout

   * [242472] Fixed a bug where the calculation of the maximum width of a

     column was incorrect.

- QGraphicsScene

   * [243707] Fixed a crash when adding a child before a parent to the

     scene.

- QGraphicsView

   * [245766] Rubber Band drag mode does not update correctly when

     scrolling.

- QGraphicsWidget

   * [246215] Fixed a regression where we could cache the wrong size hint

     because we called the virtual sizeHint() from the constructor.

- QHttp

   * Compile fixes for QT_BEGIN_NAMESPACE being in the wrong place in some

     private headers.

   * [208445] Cancel request upon receiving unknown authentication method.

- QHostAddress

   * [247330] Fixed compilation on MinGW by adding a missing QPair include.

- QLocalSocket

   * Fixed a bug that would cause QLocalSocket to disconnect 30 seconds

     after a succesful delayed connection on UNIX.

- QMacStyle

   * Adjusted the opacity value for popups.

   * [248769] Fixed a regression where QMacStyle would only draw tabs when

     passed a QStyleOptionTabV3.

- QMainWindow

   * [248048] Fixed a regression that would cause tooltips to disappear when

     using the unified toolbar.

- QMetaType

   * [248890] The detailed description of QMetaType no longer contradicts

     the documentation of QMetaType::type()

- QMutex

   * Fixed a performance regression for contended mutexes as reported on the

     qt4-preview-feedback list.

- QPainter

   * Compile fixes for OpenGL paint engine on OpenGL/ES 1.1 CommonLite and

     OpenGL/ES 1.0.

   * [246573] Fixed a very slow stroking of paths in the X11 paint engine.

   * [247083] Fixed the scale applied to antialiased cosmetic pens in X11

     paint engine.

   * [247492] Fixed a rendering bug in the raster paint engine causing

   * [247505] Fixed missing fills of rectangles with negative width/height

     in raster paint engine.

     one-pixel offset when drawing premultiplied ARGB32 images on RGB16

     images.

   * [249490] Fixed one-pixel offset between stroke and fills of ellipses in

     the X11 paint engine.

   * [249628] Fixed a crash in OpenGL paint engine when filling using

     Qt::NoBrush.

- QPixmap

   * [249175] Fixed QPixmap::fromImage() of monochrome images to result in

     black/white pixels and not transparent/white pixels.

- QProcess

   * [247865] Fixed a crash when calling QProcess::start() and

     startDetached() with an empty program string.

- QScrollBar

   * [247985] Stylesheet: added the feature to style scrollbar menus.

- QSharedPointer

   * [246843] Fixed a crash caused by using QSharedPointer in global statics.

- QSortFilterProxyModel

   * [247867] Properly sort when calling appendRows().

   * [248868] Re-sort when the model is reset if dynamicSort is enabled.

   * [248868] Fixed QSortFilterProxyModel::sort() if dynamicSort was disabled.

- QSSlSocket

   * [245668] Set also protocol, verifyMode and verifyDepth in

     setSslConfiguration().

- QString

   * [249517] Fixed a regression in replace(int, int, QChar) when the string

     is empty.

- QStyleSheetStyle

   * Improved support for setting background and foreground roles in styles

     such as the text color in a combo box popup on Mac and Cleanlooks, or

     the background of QScrollBar.

   * Fixed a crash that occured while styling the title bar of a QMdiArea.

   * [188195] Fixed the background of QAbstractScrollArea losing its color

     if styled with pseudo-class.

   * [246542] Fixed a bug in QToolButton::hover{ color:.... }.

- QThread

   * [249997] Added documentation indicating that the priority set by the

     programmer may be ignored, for example on Linux.

- QTreeView

   * Fixed a crash that may occur when events are processed immediately

     after a QSortFilterProxyModel is invalidated.

   * [246025] Fixed auto-expand that occured when quickly collapsing an item

     after clicking on a child.

   * [248163] Fixed a possible crash in the paintEvent() when spans are used.

   * [248805] Calling QTreeView::sortByColumn() programmatically was not

     working if manual sorting was disabled.

- QWidget

   * [250388] Fixed a potential crash in QWidget::scroll() when using the

     raster graphics system.

- QWidget

   * [246852] Improved handling of WindowMaximizeButtonHint for widgets with

     layouts.

-QLocale

   * String-to-number conversion functions will now ignore trailing and

     leading whitespaces in all locales as documented.

- QWizard

   * [248107] Fixed a bug on Windows Vista causing the Back button to

     connect to the back() signal twice.

- Q3ListView

   * [248689] Fixed a bug in Q3ListView that would not update under certain

     conditions.

- QtWebKit

   * Fixed a bug in cookie handling (WebKit Bugzilla 24062, Benjamin Meyer).

   * Fixed a bug in calling from JavaScript into NPAPI plugins on Windows.

   * Fixed the updating state of WebActions (Erik Bunce)

   * Fixed a bug in HTML 5 Canvas clearRect() (Dirk Schulze)

   * Fixed the theming of text fields with KDE 4 Oxygen style (Zack Rusin)

   * Fixed path fill styles (Zack Rusin)

   * Fixed pre-edit text handling with input methods.

   * [248643] Fixed compiling with the "-pedantic" compile option.

- QSqlTableModel

   * Made setTable() try and use the database's letter case (uppercase/

     lowercase)  of the given tablename.

   * [189093] QSqlTableModel did not handle updates when one of the fields

     had a NULL value.

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

*                          Database Drivers                                *

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

   * Fixed the DB2 driver returning a double field as empty.

   * Fixed a memory leak in the DB2 driver.

   * Fixed the DB2 driver not quoting table/field names properly.

   * Fixed an issue with ODBC & FreeTDS not accepting quotes in statements.

   * Fixed a bug in the sqlite2 driver not returning false on failing to

     execute a statement.

   * PrecisionPolicy now works in the oracle driver.

   * Fixed a bug in the ODBC driver returning a list of tables when

     requested.

   * Fixed Interbase retrieving scale/precision information on numeric/

     decimal fields.

   * Stopped drivers from quoting again when escapeIdentifier is called

     twice.

   * Fixed a bug in the sqlite2 driver not quoting fields correctly.

   * [232769] Fixed a memory overflow issue on bound out strings in ODBC

     Driver

   * [249059] Fixed a bug that handled QPSQL datetime/time fields with

     negative timezone offsets incorrectly.

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

*                      Platform Specific Changes                           *

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

Qt for Linux/X11

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

   * Ensured proper resetting for input contexts when switching between

     multiple input context plugins.

   * Input methods preedit strings are now reset properly when user switches

     focus without commiting a string.

   * Unicode conversion functions will handle Latin-1 character set only if

     they are used before a QCoreApplication/QApplication is constructed.

   * Improved handling of failed unicode conversion.

   * Fixed clipboard handling when the user manually creates an instance of

     the QDesktopWidget.

   * [226048] Ensured that the QDesktopWidget::resized() signal is emitted

     properly when a new screen appears or the screen geometry is changed

     without affecting the whole desktop's geometry.

   * [232632] Fixed a bug in reparenting widgets to a difference X11 screen.

   * [241888] The background of the drag-n-drop cursor is now respected,

     according to the stylesheet.

   * [244337] Improved input method handling when a widget's native window

     id is recreated.

   * [244607] Current focus widget is properly set and input method is

     properly initialized when showing a toplevel widget that accepts

     keyboard input.

- Phonon/GStreamer

   * [233188] Fixed a problem where the seek slider reset to 0 while being

     dragged.

   * [244259] Fixed a problem where the backend failed to indicate an error

     when the streaming failed.

   * [246097] Added support for the MediaController interface to allow audio

     CD playback.

   * [246189] Fixed a problem where the backend failed to correctly escape

     certain file names casuing playback to not start.

- QGtkStyle

   * The system palette is no longer strictly forced. Also improved behavior

     related to system theme changes.

   * Fixed palette and styling issues with the background color of combo box

     popups.

   * [238196] Allowed middle click to set scrollbar position, following GTK+

     behavior.

   * [239829] Disabled alt-key navigation for QGtkStyle following GTK+

     behavior.

   * [247653] Fixed a compilation issue on Solaris.

   * [249363] QFrame is now styled as a GtkScrolledWindow.

- Font rendering

   * Improved performance of subpixel antialiased text rendering by using a

     mask in the calls to XRender's text compositing function.

   * [248387] Properly respect the font config LCD filter settings for

     subpixel antialiased text rendering when Freetype's native subpixel

     rendering is disabled.

   * [248498] Fix garbled rendering of subpixel antialiased text when using

     Freetype's native subpixel rendering for vertical subpixel layouts.

   * [248644] Fall back to Qt's subpixel rendering if Freetype's subpixel

     rendering was available at compile-time but not at run-time.

- QEventDispatcherGlib

   * Event posted to a thread before it is started are not processed until

     others events are posted.

- QWidget

   * [213512] Fixed a bug that caused wrong clipping when using the

     Qt::WA_PaintOutsidePaintEvent attribute.

Qt for Windows

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

   * [240891] Corrected the focus behavior of native file dialogs, when an

     application has multiple toplevel widgets.

   * [243583] Improved drag-and-drop handling when switching mouse buttons

     quickly.

   * [244875] The system menu will now be shown for a fullscreen  window.

   * [245330] Fixed a bug that caused mouse inputs to be ignored on modal

     dialogs, when shown from an ActiveQt control.

   * [249576] Fixed a crash when using a combobox with Qt::NoFocus.

- QCoreApplication

   * [247401] Fixed a bug that caused a restarted timer to fire too early,

     resulting in QtWebKit's Javascript consuming 100% CPU on Windows.

- QWindowsXPStyle

   * [248036] Fixed an issue where tool buttons were hovering incorrectly

     when disabled.

- QWidget

   * [248391] Fixed a bug that made it impossible to dynamically switch from

     QPainter-based graphics to native graphics API and back.

Qt for Mac OS X

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

   * Fixed a crash when showing a widget that is a modal window but has no

     parent.

   * Added QSysInfo::MV_10_6 as an enum to test against.

   * Various compile fixes for the preliminary supported Snow Leopard.

   * The uninstall-qt.py script included in the binary package no longer

     complains about removing itself multiple times.

-  * Improved the documentation for how qt_mac_set_dock_menu() works.

   * Fixed an issue with the focus frame's transparency as it was difficult

     to use the QWidget with stylesheets.

   * [223525] Fixed a crash in the MacMainWindow Demo.

   * [248803] Ensured that two dialogs shown at the same time will both not

     have visible default buttons.

- QDesktopWidget

   * [244004] Properly support multiple screens with different sizes.

- QDialog

   * [195904] Parent dialog is displayed on top of its modal child.

   * [218980] Modeless dialogs should be stacked above normal windows.

   * [239155] QDialog(foo, Qt::Sheet) with QComboBox has non-native

     behavior.

- QFileDialog

   * [219844] Fixed a crash caused by QFileDialog::getOpenFileName()'s

     search buttons (native version).

   * [225705] QFileDialog::getSaveFileName()'s filter does not display

     correctly.

- QMenu

   * [228017] Ensured that QMenu closes when expanding a system menu.

- QTestLib

   * Activate the test application when launched from the command line.

- Event system

   * [210912] Fixed a bug where ShowEvent not sent when reshowing a window

     after it was minimized.

- macdeployqt 

   * The binary packages now include this tool.

   * macdeployqt now runs 'strip' on the deployed binaries.

   * Fixed an issue that prevented the QtSvg module from being deployed.

- configure script

   * Now supports "-arch i386" as an alias for "-arch x86".

   * Detects invalid arch arguemnts and exits.

- Cocoa port

   * Fixed a bug where actions in the native menubar were not disabled

     properly.

   * Made shortcuts work properly when using the Dvorak-QWERTY+CMD keyboard

     layout.

   * Fixed a bug where dialogs were positioned in the wrong place on the

     screen.

   * The build-key for Cocoa was changed in the unlikely case that a plugin

     may make assumptions on how Qt was built. All Cocoa plugins built

     against Qt 4.5.0 will NOT work with Qt 4.5.1; we do not foresee

     changing this again.

   * Fixed a bug where some windows did not get activation when they

     normally should.

   * Fixed a bug where key events sent to popups were not propagated

     onwards.

   * QFileOpenEvents will no longer be sent for items passed via command

     line.

   * Various fixes for determining the metrics of text and the ability to

     disable kerning.

   * Modified the Colliding Mice Example to work better with coalesced

     updates.

   * Fixed a bug where the drag cursor was not updated when modifier keys

     were used.

   * [239043] Fixed a bug that caused QGraphicsProxyWidget to shrink when

     moved.

   * [244369] Window flags on Cocoa windows should look similar to the

     Carbon ones.

   * [247947] Fixed a crash in drag and drop.

   * [248918] Fixed color matching for themed text items.

   * The command + h shortcut is now enabled. (Hides the current window.)

   * [249296] Fixed a bug where line edits on a second page of a stack

     widget were not getting key events.

Qt for Embedded Linux

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

-  * Various improvements to the Qt DirectFB plugin.

   * Fixed recreation of temporary EGL surfaces in the PowerVR QScreen

     driver.

-  * Document some necessary #define's for building the PowerVR QScreen

     driver.

Qt for Windows CE

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

   * [246619] Fixed a tap and hold bug for QCheckbox.

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

*                      Compiler Specific Changes                           *

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

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

*                          Tools                                           *

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

- Build System

- Assistant

- Designer

   * [245503] Fixed redundant backslashes in string property in the property

     browser.

   * [245961] Restricted objectname-validation to known object name

     properties only.

   * [247995] Fixed a crash occurring after layout operations that caused

     an instance of QGridLayout or QFormLayout to shrink.

   * [248000] Fixed a crash ocurring when re-layouting empty grid layouts.

   * [249097] Fixed a crash related to undoing a QGridLayout re-layout

     operation.

- Linguist

  - Linguist GUI

     * [248076] Fixed a crash caused by opening files for which we have no

       plural rules.

     * [249519] Fixed a crash upon dropping text into a non-focused line

       edit.

  - Entire Linguist toolchain

     * [244035] Fixed an infinite loop in PO writer.

     * [247738] Improved handling of duplicated messages.

     * [248849] Fixed the encoding in XLIFF writer.

     * [249022] Fixed TS' and QM's handling of messages which appear in

       multiple encodings.

  - lupdate

     * [248724] Fixed the encoding of messages from .ui files if CODECFORTR