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+/****************************************************************************
+**
+** Help with porting from Qt 2.x to Qt 3.x
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of the Qt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free Qt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing retquirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at sales@trolltech.com.
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.QPL
+** included in the packaging of this file.  Licensees holding valid Qt
+** Commercial licenses may use this file in accordance with the Qt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+/*!
+\page porting.html
+
+\title Porting to Qt 3.x
+
+This document describes porting applications from Qt 2.x to Qt 3.x. 
+
+The Qt 3.x series is not binary compatible with the 2.x series. This
+means programs compiled for Qt 2.x must be recompiled to work with Qt
+3.x.  Qt 3.x is also not completely \e source compatible with 2.x,
+however all points of incompatibility cause compiler errors or
+run-time messages (rather than mysterious results).  Qt 3.x includes
+many additional features and discards obsolete functionality. Porting
+from Qt 2.x to Qt 3.x is straightforward, and once completed makes 
+the considerable additional power and flexibility of Qt 3.x available
+for use in your applications.
+
+To port code from Qt 2.x to Qt 3.x:
+
+\list 1
+
+\i Briefly read the porting notes below to get an idea of what to expect.
+\i Be sure your code compiles and runs well on all your target platforms
+   with Qt 2.x.
+\i Recompile with Qt 3.x.  For each error, search below for related
+   identifiers (e.g. function names, class names). This document 
+   mentions all relevant identifiers to help you get the information
+   you need at the cost of being a little verbose.
+\i If you get stuck, ask on the \link http://qt-interest.trolltech.com/
+   qt-interest \endlink mailing list, or Trolltech Technical Support if
+   you're a registered licensee.
+
+\endlist
+
+Table of contents:
+
+\tableofcontents
+
+\target Linkerrors
+\section1 Link Errors on Windows
+
+On Windows, originally in Qt 2.x, the default configuration of the Qt
+library is static. If you just use the default configuration you
+don't need to set certain preprocessor defines.  In Qt 3.0, the
+default configuration of the Qt library is to build it as a shared
+library, therefore the preprocessor define \c QT_DLL is needed.
+
+If you use tmake with Qt 2.x, and now use qmake with Qt 3.x, then the
+cause of the problem is with the project file. In the project file,
+there is usually line that looks like:
+
+\c CONFIG = ...
+
+this should be changed to 
+
+\c CONFIG += ...
+
+so that qmake can look at the configuration that Qt was built with and
+set any relevant preprocessor defines in the makefile.
+
+\target Headers
+\section1 Header file inclusion changes
+
+Qt 3.x remove some unnecessary nested #include directives from
+header files. This speeds up compilation when you don't need those
+nested header files. But in some cases you will find you need to add
+an extra #include to your files.
+
+For example, if you get a message about QStringList or its functions
+not being defined, then add \c {#include <qstringlist.h>} at
+the top of the file giving the error.
+
+Header files that you might need to add #include directives for include:
+\list
+\i \c <qcursor.h>
+\i \c <qpainter.h>
+\i \c <qpen.h>
+\i \c <qstringlist.h>
+\i \c <qregexp.h>
+\i \c <qstrlist.h>
+\i \c <qstyle.h>
+\i \c <qvaluelist.h>
+\endlist
+
+\section1 Namespace
+
+Qt 3.x is namespace clean.  A few global identifiers that had been
+left in Qt 2.x have been discarded.
+
+Enumeration \l Qt::CursorShape and its values are now part of the
+special \c Qt class defined in qnamespace.h. If you get compilation
+errors about these being missing (unlikely, since most of your code will
+be in classes that inherit from the Qt namespace class), then apply
+the following changes:
+
+\list
+\i \c QCursorShape becomes \c Qt::CursorShape
+\i \c ArrowCursor becomes \c Qt::ArrowCursor
+\i \c UpArrowCursor becomes \c Qt::UpArrowCursor
+\i \c CrossCursor becomes \c Qt::CrossCursor
+\i \c WaitCursor becomes \c Qt::WaitCursor
+\i \c IbeamCursor becomes \c Qt::IbeamCursor
+\i \c SizeVerCursor becomes \c Qt::SizeVerCursor
+\i \c SizeHorCursor becomes \c Qt::SizeHorCursor
+\i \c SizeBDiagCursor becomes \c Qt::SizeBDiagCursor
+\i \c SizeFDiagCursor becomes \c Qt::SizeFDiagCursor
+\i \c SizeAllCursor becomes \c Qt::SizeAllCursor
+\i \c BlankCursor becomes \c Qt::BlankCursor
+\i \c SplitVCursor becomes \c Qt::SplitVCursor
+\i \c SplitHCursor becomes \c Qt::SplitHCursor
+\i \c PointingHandCursor becomes \c Qt::PointingHandCursor
+\i \c BitmapCursor becomes \c Qt::BitmapCursor
+\endlist
+
+The names of some debugging macro variables have been changed.  We have
+tried not to break source compatibility as much as possible.  If you observe
+error messages on the UNIX console or the Windows debugging stream that were
+previously disabled, please check these macro variables:
+
+\list
+\i \c DEBUG becomes \c QT_DEBUG
+\i \c NO_DEBUG becomes \c QT_NO_DEBUG
+\i \c NO_CHECK becomes \c QT_NO_CHECK
+\i \c CHECK_STATE becomes \c QT_CHECK_STATE
+\i \c CHECK_RANGE becomes \c QT_CHECK_RANGE
+\i \c CHECK_NULL becomes \c QT_CHECK_NULL
+\i \c CHECK_MATH becomes \c QT_CHECK_MATH
+\endlist
+
+The name of some debugging macro functions has been changed as well
+but source compatibility should not be affected if the macro variable
+\c QT_CLEAN_NAMESPACE is not defined:
+
+\list
+\i \c ASSERT becomes \c Q_ASSERT
+\i \c CHECK_PTR becomes \c Q_CHECK_PTR
+\endlist
+
+For the record, undocumented macro variables that are not part of the API
+have been changed:
+
+\list
+\i \c _OS_*_ becomes \c Q_OS_*
+\i \c _WS_*_ becomes \c Q_WS_*
+\i \c _CC_*_ becomes \c Q_CC_*
+\endlist
+
+\section1 Removed Functions
+
+All these functions have been removed in Qt 3.x:
+\list
+\i QFont::charSet()
+\i QFont::setCharSet()
+\i QMenuBar::setActItem()
+\i QMenuBar::setWindowsAltMode()
+\i QObject::initMetaObject()
+\i QPainter::drawQuadBezier()
+\i QPointArray::quadBezier()
+\i QRegExp::find()
+\i QSpinBox::downButton()
+\i QSpinBox::upButton()
+\i QString::basicDirection()
+\i QString::visual()
+\i QStyle::set...() functions
+\i QStyle::drawArrow()
+\i QWidget::setFontPropagation()
+\i QWidget::setPalettePropagation()
+\endlist
+
+Also, to avoid conflicts with \c <iostream>, the following three
+global functions have been renamed:
+\list
+\i setw() (renamed qSetW())
+\i setfill() (renamed qSetFill())
+\i setprecision() (renamed qSetPrecision())
+\endlist
+
+\section1 Obsoleted Functions
+
+The following functions have been obsoleted in Qt 3.0. The
+documentation of each of these functions should explain how to
+replace them in Qt 3.0.
+
+\warning It is best to consult \l http://doc.trolltech.com/3.0/
+rather than the documentation supplied with Qt to obtain the latest
+information regarding obsolete functions and how to replace them in
+new code.
+
+\list
+\i QAccel::keyToString( QKeySequence k )
+\i QAccel::stringToKey( const QString \& s )
+\i QActionGroup::insert( QAction *a )
+\i QButton::autoResize() const
+\i QButton::setAutoResize( bool )
+\i QCanvasItem::active() const
+\i QCanvasItem::enabled() const
+\i QCanvasItem::selected() const
+\i QCanvasItem::visible() const
+\i QCanvasPixmapArray::QCanvasPixmapArray( QPtrList\<QPixmap\> list, QPtrList\<QPoint\> hotspots )
+\i QCanvasPixmapArray::operator!()
+\i QColorGroup::QColorGroup( const QColor \& foreground, const QColor \& background, const QColor \& light, const QColor \& dark, const QColor \& mid, const QColor \& text, const QColor \& base )
+\i QComboBox::autoResize() const
+\i QComboBox::setAutoResize( bool )
+\i QDate::dayName( int weekday )
+\i QDate::monthName( int month )
+\i QDir::encodedEntryList( const QString \& nameFilter, int filterSpec = DefaultFilter, int sortSpec = DefaultSort ) const
+\i QDir::encodedEntryList( int filterSpec = DefaultFilter, int sortSpec = DefaultSort ) const
+\i QDockWindow::isHorizontalStretchable() const
+\i QDockWindow::isVerticalStretchable() const
+\i QDockWindow::setHorizontalStretchable( bool b )
+\i QDockWindow::setVerticalStretchable( bool b )
+\i QFont::defaultFont()
+\i QFont::setDefaultFont( const QFont \& f )
+\i QFont::setPixelSizeFloat( float pixelSize )
+\i QFontDatabase::bold( const QString \& family, const QString \& style, const QString \& ) const
+\i QFontDatabase::families( bool ) const
+\i QFontDatabase::font( const QString \& familyName, const QString \& style, int pointSize, const QString \& )
+\i QFontDatabase::isBitmapScalable( const QString \& family, const QString \& style, const QString \& ) const
+\i QFontDatabase::isFixedPitch( const QString \& family, const QString \& style, const QString \& ) const
+\i QFontDatabase::isScalable( const QString \& family, const QString \& style, const QString \& ) const
+\i QFontDatabase::isSmoothlyScalable( const QString \& family, const QString \& style, const QString \& ) const
+\i QFontDatabase::italic( const QString \& family, const QString \& style, const QString \& ) const
+\i QFontDatabase::pointSizes( const QString \& family, const QString \& style, const QString \& )
+\i QFontDatabase::smoothSizes( const QString \& family, const QString \& style, const QString \& )
+\i QFontDatabase::styles( const QString \& family, const QString \& ) const
+\i QFontDatabase::weight( const QString \& family, const QString \& style, const QString \& ) const
+\i QLabel::autoResize() const
+\i QLabel::setAutoResize( bool enable )
+\i QLineEdit::cursorLeft( bool mark, int steps = 1 )
+\i QLineEdit::cursorRight( bool mark, int steps = 1 )
+\i QLineEdit::hasMarkedText() const
+\i QLineEdit::markedText() const
+\i QLineEdit::repaintArea( int, int )
+\i QListBox::cellHeight( int i ) const
+\i QListBox::cellHeight() const
+\i QListBox::cellWidth() const
+\i QListBox::findItem( int yPos ) const
+\i QListBox::inSort( const QListBoxItem *lbi )
+\i QListBox::inSort( const QString \& text )
+\i QListBox::itemYPos( int index, int *yPos ) const
+\i QListBox::numCols() const
+\i QListBox::totalHeight() const
+\i QListBox::totalWidth() const
+\i QListBoxItem::current() const
+\i QListBoxItem::selected() const
+\i QListView::removeItem( QListViewItem *item )
+\i QListViewItem::removeItem( QListViewItem *item )
+\i QMainWindow::addToolBar( QDockWindow *, Dock = DockTop, bool newLine = FALSE )
+\i QMainWindow::addToolBar( QDockWindow *, const QString \& label, Dock = DockTop, bool newLine = FALSE )
+\i QMainWindow::lineUpToolBars( bool keepNewLines = FALSE )
+\i QMainWindow::moveToolBar( QDockWindow *, Dock = DockTop )
+\i QMainWindow::moveToolBar( QDockWindow *, Dock, bool nl, int index, int extraOffset = -1 )
+\i QMainWindow::removeToolBar( QDockWindow *)
+\i QMainWindow::setToolBarsMovable( bool )
+\i QMainWindow::toolBarPositionChanged( QToolBar *)
+\i QMainWindow::toolBarsMovable() const
+\i QMessageBox::message( const QString \& caption, const QString \& text, const QString \& buttonText = QString::null, QWidget *parent = 0, const char *= 0 )
+\i QMessageBox::query( const QString \& caption, const QString \& text, const QString \& yesButtonText = QString::null, const QString \& noButtonText = QString::null, QWidget *parent = 0, const char *= 0 )
+\i QMessageBox::standardIcon( Icon icon, GUIStyle style )
+\i QPalette::normal()
+\i QRegExp::match( const QString \& str, int index = 0, int *len = 0, bool indexIsStart = TRUE ) const
+\i QScrollView::childIsVisible( QWidget *child )
+\i QScrollView::showChild( QWidget *child, bool show = TRUE )
+\i QSignal::block( bool b )
+\i QSignal::isBlocked() const
+\i QSignal::parameter() const
+\i QSignal::setParameter( int value )
+\i QSimpleRichText::draw( QPainter *p, int x, int y, const QRegion \& clipRegion, const QColorGroup \& cg, const QBrush *paper = 0 ) const
+\i QString::ascii() const
+\i QString::data() const
+\i QString::setExpand( uint index, QChar c )
+\i QStyle::defaultFrameWidth() const
+\i QStyle::scrollBarExtent() const
+\i QStyle::tabbarMetrics( const QWidget *t, int \& hf, int \& vf, int \& ov ) const
+\i QTabDialog::isTabEnabled( const char *name ) const
+\i QTabDialog::selected( const QString \& )
+\i QTabDialog::selected( const QString \& tabLabel )
+\i QTabDialog::setTabEnabled( const char *name, bool enable )
+\i QTextStream::QTextStream( QString \& str, int filemode )
+\i QToolBar::QToolBar( const QString \& label, QMainWindow *, ToolBarDock = DockTop, bool newLine = FALSE, const char *name = 0 )
+\i QToolButton::iconSet( bool on ) const
+\i QToolButton::offIconSet() const
+\i QToolButton::onIconSet() const
+\i QToolButton::setIconSet( const QIconSet \& set, bool on )
+\i QToolButton::setOffIconSet( const QIconSet \& )
+\i QToolButton::setOnIconSet( const QIconSet \& )
+\i QToolTip::enabled()
+\i QToolTip::setEnabled( bool enable )
+\i QTranslator::find( const char *context, const char *sourceText, const char *comment = 0 ) const
+\i QTranslator::insert( const char *context, const char *sourceText, const QString \& translation )
+\i QTranslator::remove( const char *context, const char *sourceText )
+\i QUriDrag::setFilenames( const QStringList \& fnames )
+\i QWidget::backgroundColor() const
+\i QWidget::backgroundPixmap() const
+\i QWidget::iconify()
+\i QWidget::setBackgroundColor( const QColor \& c )
+\i QWidget::setBackgroundPixmap( const QPixmap \& pm )
+\i QWidget::setFont( const QFont \& f, bool )
+\i QWidget::setPalette( const QPalette \& p, bool )
+\i QWizard::setFinish( QWidget *, bool )
+\i QXmlInputSource::QXmlInputSource( QFile \& file )
+\i QXmlInputSource::QXmlInputSource( QTextStream \& stream )
+\i QXmlReader::parse( const QXmlInputSource \& input )
+\endlist
+
+Additionally, these preprocessor directives have been removed:
+
+\list
+\i \c {#define strlen qstrlen}
+\i \c {#define strcpy qstrcpy}
+\i \c {#define strcmp qstrcmp}
+\i \c {#define strncmp qstrncmp}
+\i \c {#define stricmp qstricmp}
+\i \c {#define strnicmp qstrnicmp}
+\endlist
+
+See the changes-3.0.0 document for an explanation of why this had to be done.
+You might have been relying on the non-portable and unpredictable behavior
+resulting from these directives. We strongly recommend that you either make
+use of the safe qstr* variants directly or ensure that no 0 pointer is
+passed to the standard C functions in your code base.
+
+\section1 Collection Class Renaming
+
+The classes QArray, QCollection, QList, QListIterator, QQueue, QStack
+and QVector have been renamed. To ease porting, the old names and the
+old header-file names are still supported.
+
+\table
+\header \i Old Name \i New Name \i New Header File
+\row \i QArray \i \l QMemArray \i \c <qmemarray.h>
+\row \i QCollection \i \l QPtrCollection \i \c <qptrcollection.h>
+\row \i QList \i \l QPtrList \i \c <qptrlist.h>
+\row \i QListIterator \i \l QPtrListIterator \i \c <qptrlist.h>
+\row \i QQueue \i \l QPtrQueue \i \c <qptrqueue.h>
+\row \i QStack \i \l QPtrStack \i \c <qptrstack.h>
+\row \i QVector \i \l QPtrVector \i \c <qptrvector.h>
+\endtable
+
+\section1 QButtonGroup
+
+In Qt 2.x, the function QButtonGroup::selected() returns the selected
+\e radio button (QRadioButton). In Qt 3.0, it returns the selected \e
+toggle button (\l QButton::toggleButton), a more general concept.
+This might affect programs that use QButtonGroups that contain a
+mixture of radio buttons and non-radio (e.g. QCheckBox) toggle buttons.
+
+\section1 QDate
+
+Two QDate member functions that were virtual in Qt 2.0 are not virtual
+in Qt 3.0. This is only relevant if you subclassed QDate and
+reimplemented these functions:
+
+\list
+\i QString QDate::monthName( int month ) const
+\i QString QDate::dayName( int weekday ) const
+\endlist
+
+In addition to no longer being virtual, QDate::monthName() and
+QDate::dayName() have been renamed QDate::shortMonthName() and
+QDate::shortDayName() and have been made static (as they should had
+been in the first place). The old names are still provided for source
+compatibility.
+
+\section1 QFileDialog
+
+If the mode was not set explicitly, and the user entered a
+non-existent file, the dialog would accept this. In Qt 3.x, you must
+set the mode, e.g. setMode(QFileDialog::AnyFile), to get the same
+behavior.
+
+\section1 QFont
+
+The internals of QFont have changed significantly between Qt 2.2 and
+Qt 3.0, to give better Unicode support and to make developing
+internationalized applications easier. The original API has been
+preserved with minimal changes. The CharSet enum and its related
+functions have disappeared. This is because Qt now handles all charset
+related issues internally, and removes this burden from the developer.
+
+If you used the CharSet enum or its related functions, e.g
+QFont::charSet() or QFont::setCharSet(), just remove them from your
+code. There are a few functions that took a QFont::CharSet as a
+parameter; in these cases simply remove the charset from the
+parameter list.
+
+\section1 QInputDialog
+
+The two static getText(...) methods in QInputDialog have been merged. 
+The \c echo parameter is the third parameter and defaults to 
+QLineEdit::Normal. 
+
+If you used calls to QInputDialog::getText(...) that provided more 
+than the first two retquired parameters you will must add a value 
+for the \c echo parameter.
+
+\section1 QLayout and Other Abstract Layout Classes
+
+The definitions of \l QGLayoutIterator, \l QLayout, \l QLayoutItem, \l
+QLayoutIterator, \l QSpacerItem and \l QWidgetItem have been moved from \c
+<qabstractlayout.h> to \c <qlayout.h>. The header \c
+<qabstractlayout.h> now includes \c <qlayout.h> for compatibility. It
+might be removed in a future version.
+
+\section1 QListViewItem
+
+The paintBranches() function in Qt 2.x had a GUIStyle parameter; this
+has been dropped for Qt 3.x since GUI style is handled by the new
+style engine (See \l QStyle.)
+
+\section1 QMoveEvent
+
+In Qt 2.x, the function QMoveEvent::pos() returned the position of the
+widget in its parent widget, including the window frame. In Qt 3.0,
+it returns the new position of the widget, excluding window frame for
+top level widgets.
+
+\section1 QMultiLineEdit
+
+The QMultiLineEdit was a simple editor widget in previous Qt versions.
+Since Qt 3.0 includes a new richtext engine, which also supports
+editing, QMultiLineEdit is obsolete. For the sake of compatibility
+QMultiLineEdit is still provided. It is now a subclass of QTextEdit
+which wraps the old QMultiLineEdit so that it is mostly source
+compatible to keep old applications working.
+
+For new applications and when maintaining existing applications we
+recommend that you use QTextEdit instead of QMultiLineEdit wherever
+possible.
+
+Although most of the old QMultiLineEdit API is still available, there
+is one important difference. The old QMultiLineEdit operated in terms
+of lines, whereas QTextEdit operates in terms of paragraphs. This is
+because lines change all the time during wordwrap, whereas paragraphs
+remain paragraphs. The consequence of this change is that functions
+which previously operated on lines, e.g. numLines(), textLine(), etc.,
+now work on paragraphs.
+
+Also the function getString() has been removed since it
+published the internal data structure.
+
+In most cases, applications that used QMultiLineEdit will continue to
+work without problems. Applications that worked in terms of lines may
+retquire some porting.
+
+The source code for the old 2.x version of QMultiLineEdit can be found
+in \c $QTDIR/src/attic/qtmultilineedit.h/cpp. Note that the class has
+been renamed to QtMultiLineEdit to avoid name clashes. If you really
+need to keep compatibility with the old QMultiLineEdit, simply include
+this class in your project and rename QMultiLineEdit to
+QtMultiLineEdit throughout.
+
+\section1 QPrinter
+
+QPrinter has undergone some changes, to make it more flexible and
+to ensure it has the same runtime behaviour on both Unix and Windows. In 2.x,
+QPrinter behaved differently on Windows and Unix, when using view
+transformations on the QPainter. This has changed now, and QPrinter
+behaves consistently across all platforms. A compatibilty mode has been
+added that forces the old behaviour, to ease porting from Qt 2.x
+to Qt 3.x. This compatibilty mode can be enabled by passing the
+QPrinter::Compatible flag to the QPrinter constructor.
+
+On X11, QPrinter used to generate encapsulated postscript when
+fullPage() was TRUE and only one page was printed. This does not
+happen by default anymore, providing a more consistent printing output.
+
+\section1 QRegExp
+
+The \l QRegExp class has been rewritten to support many of the features of Perl
+regular expressions.  Both the regular expression syntax and the QRegExp
+interface have been modified.
+
+Be also aware that \c <qregexp.h> is no longer included
+automatically when you include \c <qstringlist.h>. See
+\link #Headers above \endlink for details.
+
+\omit
+In Qt 3.0, qregexp.h has to
+include qstringlist.h, so it's no good to have qstringlist.h include qregexp.h,
+unless one wants to achieve an Escher effect.
+\endomit
+
+\section2 New special characters
+
+There are five new special characters: <tt>(</tt>, <tt>)</tt>, <tt>{</tt>,
+<tt>|</tt> and <tt>}</tt> (parentheses, braces and pipe). When porting old
+regular expressions, you must add <tt>&#92;</tt> (backslash) in front of any
+of these (actually, <tt>&#92;&#92;</tt> in C++ strings), unless it is already
+there.
+
+Example: Old code like
+\code
+    QRegExp rx( "([0-9|]*\\)" );        // works in Qt 2.x
+\endcode
+should be converted into
+\code
+    QRegExp rx( "\\([0-9\\|]*\\)" );      // works in Qt 2.x and 3.x
+\endcode
+(Within character classes, the backslash is not necessary in front of certain
+characters, e.g. <tt>|</tt>, but it doesn't hurt.)
+
+Wildcard patterns need no conversion.  Here are two examples:
+\code
+    QRegExp wild( "(*.*)" );
+    wild.setWildcard( TRUE );
+\endcode
+\code
+    // TRUE as third argument means wildcard
+    QRegExp wild( "(*.*)", FALSE, TRUE );
+\endcode
+However, when they are used, make sure to use QRegExp::exactMatch()
+rather than the obsolete QRegExp::match(). QRegExp::match(), like
+QRegExp::find(), tries to find a match somewhere in the target
+string, while QRegExp::exactMatch() tries to match the whole target
+string.
+
+\section2 QRegExp::operator=()
+
+This function has been replaced by \l QRegExp::setPattern() in Qt 2.2.
+Old code such as
+\code
+    QRegExp rx( "alpha" );
+    rx.setCaseSensitive( FALSE );
+    rx.setWildcard( TRUE );
+    rx = "beta";
+\endcode
+still compiles with Qt 3, but produces a different result (the case sensitivity
+and wildcard options are forgotten). This way,
+\code
+    rx = "beta";
+\endcode
+is the same as
+\code
+    rx = QRegExp( "beta" );
+\endcode
+which is what one expects.
+
+\section2 QRegExp::match()
+
+The following function is now obsolete, as it has an unwieldy
+parameter list and was poorly named:
+\list
+\i bool QRegExp::match( const QString \& str, int index = 0,
+			int * len = 0, bool indexIsStart = TRUE ) const
+\endlist
+It will be removed in a future version of Qt. Its \link
+QRegExp::match() documentation \endlink explains how to replace it.
+
+\section2 QRegExp::find()
+
+This function was removed, after a brief appearance in Qt 2.2.  Its
+name clashed with QString::find().  Use \l QRegExp::search() or \l
+QString::find() instead.
+
+\section2 QString::findRev() and QString::contains()
+
+\l QString::findRev()'s and \l QString::contains()'s semantics have changed
+between 2.0 and 3.0 to be more consistent with the other overloads.
+
+For example,
+\code
+    QString( "" ).contains( QRegExp("") )
+\endcode
+returns 1 in Qt 2.0; it returns 0 in Qt 3.0. Also, "^" now really means
+start of input, so
+\code
+    QString( "Heisan Hoppsan" ).contains( QRegExp("^.*$") )
+\endcode
+returns 1, not 13 or 14.
+
+This change affect very few existing programs.
+
+\section2 QString::replace()
+
+With Qt 1.0 and 2.0, a QString is converted implicitly into a QRegExp
+as the first argument to QString::replace():
+\code
+    QString text = fetch_it_from_somewhere();
+    text.replace( QString("[A-Z]+"), "" );
+\endcode
+With Qt 3.0, the compiler gives an error. The solution is to use a
+QRegExp cast:
+\code
+    text.replace( QRegExp("[A-Z]+"), "" );
+\endcode
+This change makes it possible to introduce a
+QString::replace(QString, QString) overload in a future version of Qt
+without breaking source compatibility.
+
+\section1 QSemiModal 
+
+The QSemiModal class is now obsolete. You should call show() on a
+modal dialog instead.
+
+\section1 QSortedList
+
+The QSortedList class is now obsolete. Consider using a QDict, a QMap
+or a plain QPtrList instead.
+
+\section1 QTableView
+
+The QTableView class has been obsoleted and is no longer a part of the
+Qt API. Either use the powerful QTable class or the simplistic
+QGridView in any new code you create. If you really need the old table
+view for compatibility you can find it in \c
+$QTDIR/src/attic/qttableview.{cpp,h}. Note that the class has been
+renamed from QTableView to QtTableView to avoid name clashes. To use
+it, simply include it in your project and rename QTableView to
+QtTableView throughout.
+
+\section1 QToolButton
+
+The \l QToolButton class used to distinguish between "on" and "off"
+icons. In 3.0, this mechanism was moved into the \l QIconSet class
+(see \l QIconSet::State).
+
+The old \l QToolButton::onIconSet and \l QToolButton::offIconSet
+properties are still provided so that old source will compile, but
+their semantics have changed: they are now synonyms for \l
+QToolButton::iconSet. If you used that distinction in Qt 2.x, you will
+need to adjust your code to use the QIconSet On/Off mechanism.
+
+Likewise, the \e on parameter of these two functions is now ignored:
+
+\list
+\i void QToolButton::setIconSet ( const QIconSet \& set, bool on )
+\i QIconSet QToolButton::iconSet ( bool on ) const
+\endlist
+
+These functions are only provided for ease of porting. New code
+should use the following instead:
+
+\list
+\i void QToolButton::setIconSet( const QIconSet \& set )
+\i QIconSet QToolButton::iconSet() const
+\endlist
+
+Finally, this function is no longer virtual:
+
+\list
+\i void QToolButton::setIconSet( const QIconSet \& set, bool on )
+\endlist
+
+If you have a class that inherits QToolButton and that reimplements
+QToolButton::setIconSet(), you should make the signature of the
+reimplementation agree with the new \l QToolButton::setIconSet(),
+a virtual function.
+
+\section1 QTextStream
+
+The global QTextStream manipulators setw(), setfill() and setprecison()
+were renamed to qSetW(), qSetFill() and qSetPrecision() to avoid conflicts
+with \c <iostream.h>. If you used them, you must rename the occurrences to
+the new names.
+
+\section1 QTranslator
+
+The \l QTranslator class was extended in Qt 2.2, and these extensions
+lead to a new interface.  This interface is used mainly by translation
+tools (for example, \link linguist-manual.book Qt
+Linguist \endlink).  For source compatibility, no member function was
+effectively removed.  The \l QTranslator documentation points out
+which functions are obsolete.
+
+This function is no longer virtual:
+
+\list
+\i QString QTranslator::find( const char * context,
+			      const char * sourceText ) const
+\endlist
+
+If you have a class that inherits QTranslator and which reimplements
+QTranslator::find(), you should reimplement QTranslator::findMessage() instead.
+In fact, find() is now defined in terms of findMessage().  By doing the
+conversion, you will also gain support for translator comments and for any
+future extensions.
+
+\section1 QWidget
+
+QWidget::backgroundColor(), QWidget::setBackgroundColor(),
+QWidget::backgroundPixmap() and QWidget::setBackgroundPixmap() have
+often been the source of much confusion in previous releases. Qt 3.0
+addresses this by obsoleting these functions and by replacing them
+with eight new functions: QWidget::eraseColor(),
+QWidget::setEraseColor(), QWidget::erasePixmap(),
+QWidget::setErasePixmap(), QWidget::paletteBackgroundColor(),
+QWidget::setPaletteBackgroundColor(),
+QWidget::paletteBackgroundPixmap() and
+QWidget::setPaletteBackgroundPixmap(). See their documentation for
+details.
+
+\section1 QXml Classes
+
+\section2 QXmlInputSource
+
+The semantics of QXmlInputSource has changed slightly. This change
+only affects code that parses the same data from the same input source
+multiple times. In such cases you must call
+QXmlInputSource::reset() before the second call to
+QXmlSimpleReader::parse().
+
+So code like
+\code
+    QXmlInputSource source( &xmlFile );
+    QXmlSimpleReader reader;
+    ...
+    reader.parse( source );
+    ...
+    reader.parse( source );
+\endcode
+must be changed to
+\code
+    QXmlInputSource source( &xmlFile );
+    QXmlSimpleReader reader;
+    ...
+    reader.parse( source );
+    ...
+    source.reset();
+    reader.parse( source );
+\endcode
+
+\section2 QXmlLocator
+
+Due to some internal changes, it was necessary to clean-up the semantics of
+QXmlLocator: this class is now an abstract class. This shouldn't cause
+any problems, since programmers usually used the QXmlLocator that was
+reported by QXmlContentHandler::setDocumentLocator(). If you used this
+class in some other way, you must adjust your code to use the
+QXmlLocator that is reported by the
+QXmlContentHandler::setDocumentLocator() function.
+
+\section1 Asynchronous I/O Classes
+
+QASyncIO, QDataSink, QDataSource, QIODeviceSource and QDataPump were
+used internally in previous versions of Qt, but are not used anymore.
+They are now obsolete.
+
+\section1 Transparent widgets
+
+In Qt 2.x, the AutoMask property was used to obtain a
+transparent-looking widget. In general, this approach is slow and
+processor hungry. Qt 3.0 uses the BackgroundOrigin which provides
+vastly improved performance and more flexibility in most cases. The
+few classes for which the AutoMask property is still the best approach
+are QCheckBox, QComboBox, QPushButton, QRadioButton and QTabWidget.
+
+\section1 Bezier Curves
+
+The function names for Bezier curves in QPainter and QPointArray have
+been corrected. They now properly reflect their cubic form instead of
+a quadratic one. If you have been using either
+QPainter::drawQuadBezier() or QPointArray::quadBezier() you must
+replace these calls with
+\list
+\i void QPainter::drawCubicBezier( const QPointArray \&, int index=0 ) and
+\i QPointArray QPointArray::cubicBezier() const
+\endlist
+respectively. Neither the arguments nor the resulting curve have changed.
+
+\section1 Locale-aware String Comparisons in QIconView, QListBox,
+	  QListView and QTable
+
+In Qt 2.x, QString only provided string comparisons using the Unicode
+values of the characters of a string. This is efficient and reliable,
+but it is not the appropriate order for most languages. For example,
+French users expect '&eacute;' (e acute) to be treated essentially as
+'e' and not put after 'z'.
+
+In Qt 3.0, QString::localeAwareCompare() implements locale aware
+string comparisions on certain platforms. The classes \l QIconView, \l
+QListBox, \l QListView and \l QTable now use
+QString::localeAwareCompare() instead of QString::compare(). If you
+want to control the behaviour yourself you can always reimplement
+QIconViewItem::compare(), QListBox::text(), QListViewItem::compare()
+or QTableItem::key() as appropriate.
+
+*/