<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en_US" lang="en_US">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!-- qt-conf.qdoc -->
<title>Using qt.conf | QtDoc 5.1</title>
<link rel="stylesheet" type="text/css" href="style/offline.css" />
</head>
<body>
<div class="header" id="qtdocheader"></div>
<div class="content">
<div class="line">
<div class="content mainContent">
<h1 class="title">Using qt.conf</h1>
<span class="subtitle"></span>
<!-- $$$qt-conf.html-description -->
<div class="descr"> <a name="details"></a>
<p>The <tt>qt.conf</tt> file overrides the hard-coded paths that are compiled into the Qt library. These paths are accessible using the QLibraryInfo class. Without <tt>qt.conf</tt>, the functions in QLibraryInfo return these hard-coded paths; otherwise they return the paths as specified in <tt>qt.conf</tt>.</p>
<p>Without <tt>qt.conf</tt>, 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 <tt>qt.conf</tt> to make the Qt libraries look elsewhere.</p>
<p>QLibraryInfo will load <tt>qt.conf</tt> from one of the following locations:</p>
<ol class="1">
<li><tt>:/qt/etc/qt.conf</tt> using the resource system</li>
<li>on Mac OS X, in the Resource directory inside the appliction bundle, for example <tt>assistant.app/Contents/Resources/qt.conf</tt></li>
<li>in the directory containing the application executable, i.e. QCoreApplication::applicationDirPath() + QDir::separator() + "qt.conf"</li>
</ol>
<p>The <tt>qt.conf</tt> file is an INI text file, as described in the QSettings documentation. The file should have a <tt>Paths</tt> 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.</p>
<table class="generic">
<thead><tr class="qt-style"><th >Entry</th><th >Default Value</th></tr></thead>
<tr valign="top" class="odd"><td >Prefix</td><td >QCoreApplication::applicationDirPath()</td></tr>
<tr valign="top" class="even"><td >Documentation</td><td ><tt>doc</tt></td></tr>
<tr valign="top" class="odd"><td >Headers</td><td ><tt>include</tt></td></tr>
<tr valign="top" class="even"><td >Libraries</td><td ><tt>lib</tt></td></tr>
<tr valign="top" class="odd"><td >Binaries</td><td ><tt>bin</tt></td></tr>
<tr valign="top" class="even"><td >Plugins</td><td ><tt>plugins</tt></td></tr>
<tr valign="top" class="odd"><td >Imports</td><td ><tt>imports</tt></td></tr>
<tr valign="top" class="even"><td >Data</td><td ><tt>.</tt></td></tr>
<tr valign="top" class="odd"><td >Translations</td><td ><tt>translations</tt></td></tr>
<tr valign="top" class="even"><td >Settings</td><td ><tt>.</tt></td></tr>
<tr valign="top" class="odd"><td >Examples</td><td ><tt>.</tt></td></tr>
<tr valign="top" class="even"><td >Demos</td><td ><tt>.</tt></td></tr>
</table>
<p>Absolute paths are used as specified in the <tt>qt.conf</tt> file. All paths are relative to the <tt>Prefix</tt>. On Windows and X11, the <tt>Prefix</tt> is relative to the directory containing the application executable (QCoreApplication::applicationDirPath()). On Mac OS X, the <tt>Prefix</tt> is relative to the <tt>Contents</tt> in the application bundle. For example, <tt>application.app/Contents/plugins/</tt> is the default location for loading Qt plugins. Note that the plugins need to be placed in specific sub-directories under the <tt>plugins</tt> directory (see How to Create Qt Plugins for details).</p>
<p>For example, a <tt>qt.conf</tt> file could contain the following:</p>
<pre class="cpp"><span class="operator">[</span>Paths<span class="operator">]</span>
Prefix <span class="operator">=</span> <span class="operator">/</span>some<span class="operator">/</span>path
Translations <span class="operator">=</span> i18n</pre>
</div>
<!-- @@@qt-conf.html -->
</div>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its
subsidiaries. Documentation contributions included herein are the copyrights of
their respective owners.</p>
<br />
<p>
The documentation provided herein is licensed under the terms of the
<a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation
License version 1.3</a> as published by the Free Software Foundation.</p>
<p>
Documentation sources may be obtained from <a href="http://www.qt-project.org">
www.qt-project.org</a>.</p>
<br />
<p>
Digia, Qt and their respective logos are trademarks of Digia Plc
in Finland and/or other countries worldwide. All other trademarks are property
of their respective owners. <a title="Privacy Policy"
href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p>
</div>
</body>
</html>
