<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <!-- /tmp/qt-4.2.1-harald-1161357942206/qt-x11-opensource-src-4.2.1/src/gui/styles/qstyleplugin.cpp --> <head> <title>Qt 4.2: QStylePlugin Class Reference</title> <link href="classic.css" rel="stylesheet" type="text/css" /> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td align="left" valign="top" width="32"><a href="http://www.trolltech.com/products/qt"><img src="images/qt-logo.png" align="left" width="32" height="32" border="0" /></a></td> <td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> · <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a> · <a href="functions.html"><font color="#004faf">Functions</font></a></td> <td align="right" valign="top" width="230"><a href="http://www.trolltech.com"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></a></td></tr></table><h1 align="center">QStylePlugin Class Reference<br /><sup><sup>[<a href="qtgui.html">QtGui</a> module]</sup></sup></h1> <p>The QStylePlugin class provides an abstract base for custom <a href="qstyle.html">QStyle</a> plugins. <a href="#details">More...</a></p> <pre> #include <QStylePlugin></pre><p>Inherits <a href="qobject.html">QObject</a>.</p> <ul> <li><a href="qstyleplugin-members.html">List of all members, including inherited members</a></li> </ul> <a name="public-functions"></a> <h3>Public Functions</h3> <ul> <li><div class="fn"/><b><a href="qstyleplugin.html#QStylePlugin">QStylePlugin</a></b> ( QObject * <i>parent</i> = 0 )</li> <li><div class="fn"/><b><a href="qstyleplugin.html#dtor.QStylePlugin">~QStylePlugin</a></b> ()</li> <li><div class="fn"/>virtual QStyle * <b><a href="qstyleplugin.html#create">create</a></b> ( const QString & <i>key</i> ) = 0</li> <li><div class="fn"/>virtual QStringList <b><a href="qstyleplugin.html#keys">keys</a></b> () const = 0</li> </ul> <ul> <li><div class="fn"/>29 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li> </ul> <h3>Additional Inherited Members</h3> <ul> <li><div class="fn"/>1 property inherited from <a href="qobject.html#properties">QObject</a></li> <li><div class="fn"/>1 public slot inherited from <a href="qobject.html#public-slots">QObject</a></li> <li><div class="fn"/>1 signal inherited from <a href="qobject.html#signals">QObject</a></li> <li><div class="fn"/>5 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li> <li><div class="fn"/>7 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li> </ul> <a name="details"></a> <hr /> <h2>Detailed Description</h2> <p>The QStylePlugin class provides an abstract base for custom <a href="qstyle.html">QStyle</a> plugins.</p> <p>QStylePlugin is a simple plugin interface that makes it easy to create custom styles that can be loaded dynamically into applications using the <a href="qstylefactory.html">QStyleFactory</a> class.</p> <p>Writing a style plugin is achieved by subclassing this base class, reimplementing the pure virtual <a href="qstyleplugin.html#keys">keys</a>() and <a href="qstyleplugin.html#create">create</a>() functions, and exporting the class using the <a href="qtplugin.html#Q_EXPORT_PLUGIN2">Q_EXPORT_PLUGIN2</a>() macro. See <a href="plugins-howto.html">How to Create Qt Plugins</a> for details.</p> <p>See also <a href="qstylefactory.html">QStyleFactory</a> and <a href="qstyle.html">QStyle</a>.</p> <hr /> <h2>Member Function Documentation</h2> <h3 class="fn"><a name="QStylePlugin"></a>QStylePlugin::QStylePlugin ( <a href="qobject.html">QObject</a> * <i>parent</i> = 0 )</h3> <p>Constructs a style plugin with the given <i>parent</i>.</p> <p>Note that this constructor is invoked automatically by the <a href="qtplugin.html#Q_EXPORT_PLUGIN2">Q_EXPORT_PLUGIN2</a>() macro, so there is no need for calling it explicitly.</p> <h3 class="fn"><a name="dtor.QStylePlugin"></a>QStylePlugin::~QStylePlugin ()</h3> <p>Destroys the style plugin.</p> <p>Note that Qt destroys a plugin automatically when it is no longer used, so there is no need for calling the destructor explicitly.</p> <h3 class="fn"><a name="create"></a><a href="qstyle.html">QStyle</a> * QStylePlugin::create ( const <a href="qstring.html">QString</a> & <i>key</i> ) <tt> [pure virtual]</tt></h3> <p>Creates and returns a <a href="qstyle.html">QStyle</a> object for the given style <i>key</i>.</p> <p>The style key is usually the class name of the required style. Note that the keys are case insensitive. For example:</p> <pre> QStringList MyStylePlugin::keys() const { return QStringList() << "Rocket" << "StarBuster"; } QStyle *MyStylePlugin::create(const QString &key) { QString lcKey = key; if (lcKey == "rocket") { return new RocketStyle; } else if (lcKey == "starbuster") { return new StarBusterStyle; } return 0; }</pre> <p>See also <a href="qstyleplugin.html#keys">keys</a>().</p> <h3 class="fn"><a name="keys"></a><a href="qstringlist.html">QStringList</a> QStylePlugin::keys () const <tt> [pure virtual]</tt></h3> <p>Returns the list of style keys this plugin supports.</p> <p>These keys are usually the class names of the custom styles that are implemented in the plugin.</p> <p>See also <a href="qstyleplugin.html#create">create</a>().</p> <p /><address><hr /><div align="center"> <table width="100%" cellspacing="0" border="0"><tr class="address"> <td width="30%">Copyright © 2006 <a href="trolltech.html">Trolltech</a></td> <td width="40%" align="center"><a href="trademarks.html">Trademarks</a></td> <td width="30%" align="right"><div align="right">Qt 4.2.1</div></td> </tr></table></div></address></body> </html>