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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\page qt3to4.html
\title qt3to4 - The Qt 3 to 4 Porting Tool
\ingroup porting
\keyword qt3to4
The \c qt3to4 tool provides help when moving a project from Qt 3
to Qt 4. It is designed to automate the most tedious part of the
porting effort.
See \l{Porting to Qt 4} and \l{Porting .ui Files to Qt 4} for
more information about porting Qt 3 applications to Qt 4.
\section1 Usage
\c qt3to4 can be run either on individual C++ source or header
files, or on an entire project specified by a \c qmake \c .pro
file:
\snippet doc/src/snippets/code/doc_src_qt3to4.qdoc 0
In project mode, \c qt3to4 reads the \c .pro file and converts
all files specified in it. The tool modifies the files in place.
You might want to make a copy of your project before you run the
tool.
\section1 Porting Rules
The Qt porting tool loads its porting rules from an XML file
called \c q3porting.xml located in Qt's \c tools/porting/src directory.
By editing this file, you can add your own rules or remove some
rules.
The standard \c q3porting.xml file specifies the following
conversions:
\list
\o Rename classes that are now part of the Qt 3 support
library (e.g., replace \c QFileDialog with \c{Q3FileDialog}).
\o Prefix or rename enum values that have been moved or
renamed (e.g., replace \c QButton::On with \c{QCheckBox::On}) or
members of the Qt namespace (e.g., replace \c QWidget::red with
\c{Qt::red}).
\o Add \c #include directives that might be needed in Qt 4.
\endlist
\section2 Location of the qt3porting.xml File
You can now specify the location of the \c qt3porting.xml file with the
\c{-f} command line option. This is useful if you want to use a modified
file with your own rules.
If you you don't want to maintain a modified \c qt3porting.xml it is
possible to create a "patch" file that includes the original file and adds
or disables rules. The syntax for this file looks like this:
\snippet doc/src/snippets/code/doc_src_qt3to4.qdoc 1
\section1 Logging
The porting tool logs all changes to a file called \c
portinglog.txt in the current directory. This file lists all
changes made to the source files.
\section1 Advanced Usage
When porting, \c qt3to4 parses the source files and ports the
contents according to the C++ language rules. This C++ parsing
step can be disabled with the \c -disableCppParsing option.
If C++ parsing is enabled, \c qt3to4 must be able to locate the
headers included from the source files. Necessary headers include
the public Qt headers and any headers that declares names that
may conflict with names in the public Qt headers. The standard
C++ headers and system headers are usually not needed.
You can tell \c qt3to4 where to look for headers by using the
\c{-I} command-line option. Qt 3.3 header information is built
in, so it is normaly not necessary to specify the location of the
Qt headers. If you are porting from a different version of Qt 3,
you may want to disable the built-in headers with
\c{-disableBuiltInQt3Headers}, and then add the path to the
actual headers with the \c{-I} option.
When porting a project, \c qt3to4 will read the \c INCLUDEPATH
and \c DEPENDPATH variables from the \c .pro file and add the
paths specified here to the list of include search directories.
To see which headers that are not found, use the \c{-missingFileWarnings}
option.
\section1 Limitations
In some cases, you might get compiler errors because of identifiers
in the global namespace (e.g., \c CTRL). Adding
\snippet doc/src/snippets/code/doc_src_qt3to4.qdoc 2
at the beginning of the source file that contains
the indentifier solves the problem.
\section1 Legal Notices
Some source code in \c qt3to4 is licensed under specific highly
permissive licenses from the original authors. Nokia gratefully
acknowledges these contributions to \c qt3to4 and all uses of
\c qt3to4 should also acknowledge these contributions and quote the
following license statements in an appendix to the documentation.
\list
\o \l{Contributions to the Following qt3to4 Files: treewalker.h,
treedump.cpp, treedump.h, treewalker.cpp}
\endlist
*/
/*!
\page qt3to4-treewalker.html
\title Contributions to the Following qt3to4 Files: treewalker.h, treedump.cpp, treedump.h, treewalker.cpp
\ingroup licensing
\brief License information for contributions to the qt3to4 source code.
\legalese
Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). \BR
Copyright (C) 2005 Roberto Raggi
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, modify, market, reproduce,
grant sublicenses and distribute subject to the following
conditions: The above copyright notice and this permission notice
shall be included in all copies or substantial portions of the
Software. These files are provided AS IS with NO WARRANTY OF ANY
KIND, INCLUDING THE WARRANTY OF DESIGN, MERCHANTIBILITY AND FITNESS
FOR A PARTICULAR PURPOSE.
\endlegalese
*/
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