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

*                          Important Notices                               *

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

Meta-Object System

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

Qt 4.0.0 introduced a change to the way type names outside the current

scope were handled in signals and slots declarations and connections

which differed from the behavior in Qt 3.x.

Unfortunately, this could lead to signal-slot connections that were

potentially type-unsafe. Therefore, in Qt 4.0.1 type names must be fully

qualified in signal-slot declarations and connections.

For example, in Qt 4.0.0, it was possible to write:

    connect(socket, SIGNAL(error(SocketError)), ...);

In Qt 4.0.1, the above connection must be made in the following way:

    connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), ...);

Library

-------

Support for SGI Altix has been added for both gcc and Intel icc.

QX11EmbedContainer and QX11EmbedWidget are now exported classes.

This change only affects developers using Qt/X11 with gcc >= 4.0 and

symbol visibility enabled. Applications built against Qt 4.0.1 that

use these classes cannot be linked against Qt 4.0.0.

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

*                                Changes                                   *

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

Qt Designer

-----------

Fixed crash in designer when using fonts in custom widgets that

don't have a point size set but use a pixel size instead.

Fixed initial positions of the form windows in the MDI mode.

Ensured that the object inspector is updated when a page is added

to a widget stack.

Ensured that the SDK is installed and the library symbols are

exported.

Fixed crash when breaking a layout after deleting all widgets within.

Fixed handling of nested action groups.

Fixed mouse handling to match user expectations on different

platforms.

Don't change system setting for double click interval.

Disabled the richtext editor for the "statusTip" property.

Improved widget handling, loading and saving for QFrame, QTabWidget,

and Q3GroupBox.

Added a platform-neutral mechanism for saving key sequences.

Used Qt's list of supported image formats rather than an incomplete

static list.

Provided a way for plugins to access to the layout of container

widgets.

Added support for editable byte arrays.

Qt Linguist

-----------

Made lupdate handle cases where the compiler converts strings using

a different codec to that used by lupdate.

Fixed bug in lupdate and lrelease's .pro file parser.

Fixed lupdate's octal sequence handling.

Fixed duplicate context when two contexts have the same hash value.

Qt 3 to 4 Porting Tool

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

Fixed connnect statement that did not work with the new stricter moc.

Fixed incorrect porting of enum values in switch statements.

Fixed header file name replacements in include directives.

Meta Object Compiler (moc)

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

Fixed VC6 compilation of moc generated code with namespaced

superclasses.

Fixed parsing of functions that throw exceptions.

Fixed compilation of moc generated code with VC6 when inheriting

from classes inside namespaces.

Improved the efficiency of signals with default arguments.

Qt Assistant

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

Fixed the document list for full text search indexing.

Fixed case sensitive completion in the find dialog combobox.

Re-enabled the "add content file" option.

Removed the "General" tab in the settings dialog.

Fixed registry key handling and deletion of cache files.

Made it possible to read titles in the tabs in assistant.

Updated the QAssistantClient documentation.

Added the QtAssistantClient headers to the other library headers

for installation.

Fixed full text search for phrases.

General Fixes

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

- Dialogs

        Removed hard-coded margin and spacing values from built-in

        dialogs.

- QAbstractItemModel

        Fixed crash caused by removing an item with expanded children.

        Added some more see also links and defined QModelIndexList.

- QAbstractItemView

        Fixed rendering and selection issues with MultiSelection

        mode.

        Improved handling of persistent editors.

        Improved performance of item insertion.

        Improved signal handling and emission.

- QAbstractSlider

        Ensured that no changes occur if the orientation doesn't

        change in a call to setOrientation().

        Introduced better keyboard control for sliders.

        Fixed sliderPressed() and sliderReleased() signal emissions.

- QAbstractSocket

        Fixed race condition in connectToHost().

        Made bytesAvailable() return the unget buffer size as well

        as the size of any pending data.

        Made NetworkLayerProtocol non-internal.

- QAbstractSpinBox

        Fixed problems with locale and the "." and "," separators.

        Improved handling of extra whitespace at the beginning and

        end of user input.

- QApplication

        Made closeAllWindows() respect windows that reject the close

        event.

        Fixed crash caused by calling QApplication::setStyle()

        before a qApp was created.

        Improved handling of the last open window for most cases.

        Improved event handling.

- QBezier

        Used a new algorithm for offsetting curves.

        Improved performance by using a more sophisticated

        algorithm and by making QBezier a POD type.

- QBrush

        Improved radial gradient rendering.

- QColorDialog

        Process the return key correctly.

- QComboBox

        Fixed behaviour of setMaxItems() to enable new items to be

        inserted within the range allowed.

- QCommonStyle

        Ensured that mnemonics are always shown for buttons.

        Fixed position of right corner widget when used on its own.

- QDateTimeEdit

        Improved the range of input allowed for numbers.

- QDial

        Fixed valueChanged() signal emission.

- QDialog

        Fixed Lower QSizeGrip in QDialog instead of raising it.

- QDir

        Fixed relative path handling on Windows.

        Reverted empty string matching behavior to match Qt 3's

        behavior.

        Restored API compatibility with Qt 3.

- QDirModel

        Fixed accidental deletion of directories in read-only mode.

- QDockWidget

        Ensured that the size of a floating dock widget is the same

        regardless of how it was floated.

        Reintroduced double-clicking behavior to float a dock

        widget.

        Fixed incorrect moving behavior for floating widgets.

        Ensured that dock widgets display a close icon only if they

        can be closed.

- QDockWidgetLayout

        See QMainWindow.

- QDomNodeList

        Fixed handling of out-of-range items.

- QDoubleSpinBox

        Improved decimals handling and rounding behavior in

        QDoubleSpinBox.

- QFile

        Fixed problems with carriage return and line feed handling

        in readLine().

        Ensured that pos() returns the correct value if the file

        shrinks.

- QFileDialog

        Fixed incorrect behavior where the dialog would go to the

        root directory if the user tried to enter a non-existent

        directory.

        Fixed sorting by type behavior.

- QFontDatabase

        Fixed loading of special fonts.

        Fixed sample characters for Chinese scripts.

- QFontDialog

        Switched the locations of the OK and Cancel buttons.

        Made items in the font dialog read-only.

        Improved handling of the OK and Cancel buttons when the

        dialog is in reverse layout mode.

- QGifHandler

        Reintroduced GIF plugin support.

- QGridLayout

        Improved default size handling.

- QHeaderView

        Fixed section hiding behavior.

        Fixed Out of bounds error and improper calculation of last

        column.

        Improved mouse handling and widget updating.

        Fixed crashes caused by moving or removing sections, or by

        updating the current section.

        Improved signal behavior for resized or removed sections.

- QHttp

        Fixed proxy authentication.

        Fixed broken behavior when scheduling many requests to

        different hosts.

        Fixed socket object ownership issues with setSocket() that

        could lead to a crash.

- QImage

        Fixed smooth scaling for image formats other than RGB and

        ARGB32.

- QImageReader

        Fixed the default implementation of imageCount() to return a

        valid number of images.

- QInputDialog

        Switched the locations of the OK and Cancel buttons.

- QIODevice

        Fixed problems with carriage return and line feed handling

        in readLine().

        Made bytesAvailable() return the unget buffer size as well

        as the size of any pending data.

        Fixed error handling when reading lines with QFile.

        Fixed seek() behavior with regard to the unget buffer.

- QItemDelegate

        Improved layout handling, redrawing, signal emission,

        and mouse click behavior.

- QKeySequence

        Fixed accidental HTML escaping of ampersands.

- QLayout

        Print out object names in warnings.

- QLineEdit

        Enabled textChanged() signal emission when using input

        methods.

        Improved return key press handling for users of the

        returnPressed() signal.

        Fixed context menu action handling.

        Fixed editingFinished() signal emission behavior.

        Fixed Ctrl-K and Ctrl-U behavior to cut text rather than

        just deleting it.

        Fixed line edit selection behavior to maintain any current

        selection when the widget receives the keyboard focus.

- QListView

        Improved handling of hidden rows.

        Fixed rendering when used in reverse mode.

- QListWidget

        Fixed the size policy for laying out items in the list.

        Improved sorting performance.

        Fixed persistent index handling when sorting.

- QMainWindow

        Fixed problems with multiple connections from QMainWindow

        signals to QToolBar slots.

        Fixed dock widget handling (adding a widget to all dock

        areas) and incorrect dock area splitting behavior that

        could lead to crashes in QMainWindow.

        Made QMainWindow's status bar have an "Ignored" horizontal

        size policy.

- QMetaObject

        Fixed meta objects that reported far too many enums.

        Fixed the behavior of sender() to return the correct value

        during queued activation.

- QMetaType

        Fixed whitespace handling in template specialization.

        Fixed missing qt_metatype_id implementation for <void *>.

        Added more support for compilation with QT_NO_DATASTREAM.

- QMenu

        Fixed keyboard navigation when mouse navigation is also

        being used.

        Fixed menu bar merging behavior.

- QMenuBar

        Fixed Alt key navigation.

- QObject

        Fixed incorrect exception handling.

- QPaintEngine

        Suppressed warnings when drawing "empty" text.

        Fixed rendering of Underline, Overline, and StrikeOut for

        text drawn using outlines.

- QPainter

        Improved handling of clip regions when restore() is called.

        Improved text drawing performance.

- QPaintDevice

        Allowed construction of QImage before QApplication.

- QPainterPath

        Improved performance and rendering accuracy.

- QPen

        Fixed missing detach in setWidth().

- QPixmap

        Improved drawing speed and mask handling.

- QPlastiqueStyle

        Improved visual feedback for scrollbar page buttons and

        slider handle.

        Improved Plastique style on non-XRender-enabled displays.

- QProcess

        Fixed endless loop of signal being emitted if model dialog

        is used in slot.

        Made bytesAvailable() return the unget buffer size as well

        as the size of any pending data.

- QProxyModel

        Improved signal handling for propagated signals.

- QResource

        Fixed Latin-1 string handling.

        Fixed unloading of resources.

- QScrollArea

        Fixed widget resizing so that widgets that are smaller than

        the viewport remain visible.

- QSettings

        Made it possible to store QImage/QPixmap settings.

        Fixed race conditions in QSettings with INI files.

        Improved handling of non-terminated strings in INI files.

- QSizeGrip

        Made the Qt 3-style constructor public.

- QSpinBox

        Fixed problems with out-of-range integers and doubles.

- QSqlQueryModel

        Fixed integration between QSqlTableModel and MS Access.

        Fixed signal emissions for tables with only one row.

- QSqlTableModel

        Fixed problems with multiple record insertion.

- QStatusBar

        Fixed status bar height without size grip.

- QTabBar

        Fixed handling of the current page index when adding the

        first page to QTabWidget.

        Improved tab bar icon handling to enable icons to be updated

        without redrawing the entire tab bar.

- QTableView

        Improved text cursor handling and support for keyboard

        modifiers.

        Fixed problems with disappearing headers.

        Disallowed selection of hidden rows and columns.

        Fixed crashes involving empty models and tables with headers

        but no rows or columns.

- QTableWidget

        Improved sorting and signal emission behavior.

- QTabWidget

        Fixed handling of the current widget to keep the tab bar

        updated.

- QTextBrowser

        Removed temporary visible text selection when activating

        anchors with Shift-click.

- QTextCursor

        Fixed selection behavior for words at the beginning of lines.

        Fixed incorrect use of character formats when calling

        insertFragment().

        Fixed incorrect text insertion where line feeds and carriage

        returns would not be transformed into Unicode block

        separators.

- QTextDocument

        Added support for page breaking.

        Added support for relative font sizes.

        Added support for <hr /> tags.

        Fixed clipboard handling and drag and drop of text frames.

        Fixed handling of closing HTML </center> tags.

        Fixed crash (failing assertion) on import of nested empty

        HTML tables.

        Fixed data corruption in fromPlainText().

        Corrected the handling of image tags inside anchors.

        Fixed introduction of empty spaces or lines before and after

        tables.

        Fixed misrendering of some nested HTML tables with variable

        sized columns.

        Fixed crash in table drawing due to out-of-bounds access.

        Added support for the pageCountChanged() signal.

        Improved performance and size of PostScript images when

        printing high resolution or scaled images.

- QTextEdit

        Improved layout and selection handling.

        Added configuration support for non-blinking cursors.

        Improved keyboard handling.

        Improved text insertion handling.

- QTextFormat

        Added support for horizontal rules.

        Improved font handling.

- QTextLayout

        Allow line breaking at tabs.

        Improved reporting of line widths for lines ending with a

        QChar::LineSeparator.

        Fixed reporting of the minimum width for layouts that have

        NoWrap/ManualWrap as their wrap policy.

- QTextStream

        Fixed locking behavior when reading from stdin.

        Fixed seek() behavior.

        Improved Latin-1 string handling.

- QTextTable

        Improved performance and selection handling.

- QToolBar

        Fixed toolbar resizing behavior to handle icon size changes.

- QTreeView

        Improved handling of hidden rows, columns, and child items.

        Fixed repainting issues with newly inserted child items

        and selections.

        Improved scrolling behavior.

        Fixed crashes involving column handling and empty views.

        Fixed sorting indicator behavior.

- QTreeWidget

        Improved item insertion performance.

        Fixed clone() and operator=() for QTreeWidgetItem.

        Fixed crash when removing or deleting items with children.

        Improved sorting performance.

        Fixed sorting indicator behavior.

        Fixed persistent index handling when sorting.

- QUrl

        Improved the performance of removeDots().

- QWidget

        Fixed problems with adding an action multiple times.