/**************************************************************************** ** ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/ ** ** This file is part of the documentation of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:FDL$ ** GNU Free Documentation License ** Alternatively, this file may be used under the terms of the GNU Free ** Documentation License version 1.3 as published by the Free Software ** Foundation and appearing in the file included in the packaging of ** this file. ** ** Other Usage ** Alternatively, this file may be used in accordance with the terms ** and conditions contained in a signed written agreement between you ** and Nokia. ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ /*! \page qt-conf.html \title Using qt.conf The \c qt.conf file overrides the hard-coded paths that are compiled into the Qt library. These paths are accessible using the QLibraryInfo class. Without \c qt.conf, the functions in QLibraryInfo return these hard-coded paths; otherwise they return the paths as specified in \c qt.conf. Without \c qt.conf, the Qt libraries will use the hard-coded paths to look for plugins, translations, and so on. These paths may not exist on the target system, or they may not be accesssible. Because of this, you need \c qt.conf to make the Qt libraries look elsewhere. QLibraryInfo will load \c qt.conf from one of the following locations: \list 1 \o \c :/qt/etc/qt.conf using the resource system \o on Mac OS X, in the Resource directory inside the application bundle, for example \c assistant.app/Contents/Resources/qt.conf \o in the directory containing the application executable, i.e. QCoreApplication::applicationDirPath() + QDir::separator() + "qt.conf" \endlist The \c qt.conf file is an INI text file, as described in the \l {QSettings::Format}{QSettings} documentation. The file should have a \c Paths group which contains the entries that correspond to each value of the QLibraryInfo::LibraryLocation enum. See the QLibraryInfo documentation for details on the meaning of the various locations. \table \header \o Entry \o Default Value \row \o Prefix \o QCoreApplication::applicationDirPath() \row \o Documentation \o \c doc \row \o Headers \o \c include \row \o Libraries \o \c lib \row \o Binaries \o \c bin \row \o Plugins \o \c plugins \row \o Imports \o \c imports \row \o Data \o \c . \row \o Translations \o \c translations \row \o Settings \o \c . \row \o Examples \o \c . \row \o Demos \o \c . \endtable Absolute paths are used as specified in the \c qt.conf file. All paths are relative to the \c Prefix. On Windows and X11, the \c Prefix is relative to the directory containing the application executable (QCoreApplication::applicationDirPath()). On Mac OS X, the \c Prefix is relative to the \c Contents in the application bundle. For example, \c application.app/Contents/plugins/ is the default location for loading Qt plugins. Note that the plugins need to be placed in specific sub-directories under the \c{plugins} directory (see \l{How to Create Qt Plugins} for details). For example, a \c qt.conf file could contain the following: \snippet doc/src/snippets/code/doc_src_qt-conf.qdoc 0 Subgroups of the \c Paths group may be used to specify locations for specific versions of the Qt libraries. Such subgroups are of the form \c Paths/x.y.z, where x is the major version of the Qt libraries, y the minor, and z the patch level. The subgroup that most closely matches the current Qt version is used. If no subgroup matches, the \c Paths group is used as the fallback. The minor and patch level values may be omitted, in which case they default to zero. For example, given the following groups: \snippet doc/src/snippets/code/doc_src_qt-conf.qdoc 1 The current version will be matched as shown: \list \o 4.0.1 matches \c Paths/4 \o 4.1.5 matches \c Paths/4.1 \o 4.6.3 matches \c Paths/4.2.5 (because 4.2.5 is the latest version with the same major version number) \o 5.0.0 matches \c Paths \o 6.0.2 matches \c Paths/6 \endlist */