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<?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">
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  <title>KPluginFactory</title>
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        KDE 4.7 PyKDE API Reference
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<h1>KPluginFactory Class Reference</h1>
<code>from PyKDE4.kdecore import *</code>
<p>
Inherits: QObject<br />


<h2>Detailed Description</h2>

<p>\class KPluginFactory kpluginfactory.h &lt;KPluginFactory&gt;
</p>
<p>
If you develop a library that is to be loaded dynamically at runtime, then
you should return a pointer to a KPluginFactory.
</p>
<p>
For most cases it is enough to use the K_PLUGIN_FACTORY macro to create the factory.
</p>
<p>
Example:
<pre class="fragment">
 #include &lt;KPluginFactory&gt;
 #include &lt;KPluginLoader&gt;
 #include &lt;plugininterface.h&gt;

 class MyPlugin;

 K_PLUGIN_FACTORY(MyPluginFactory,
                  registerPlugin&lt;MyPlugin&gt;();
                 )
 K_EXPORT_PLUGIN(MyPluginFactory("componentName"))

 class MyPlugin : public PluginInterface
 {
     ...
     KComponentData kcd = MyPluginFactory.componentData();
     ...
 };
</pre>
</p>
<p>
K_PLUGIN_FACTORY is a convenient macro that expands to a class derived from KPluginFactory
providing two constructors and a static componentData() function. The second argument to
K_PLUGIN_FACTORY is code that is called from the constructors. There you can use registerPlugin
to register as many plugins for the factory as you want to.
</p>
<p>
If you want to write a custom KPluginFactory not using the standard macro(s) you can reimplement
the create(const char *iface, QWidget *parentWidget, QObject *parent, const QVariantList &amp;args, const QString &amp;keyword)
function.
</p>
<p>
Example:
<pre class="fragment">
 class SomeScriptLanguageFactory : public KPluginFactory
 {
     Q_OBJECT
 public:
     SomeScriptLanguageFactory()
         : KPluginFactory("SomeScriptLanguageComponent")
     {}

 protected:
     virtual QObject *create(const char *iface, QWidget *parentWidget, QObject *parent, const QVariantList &amp;args, const QString &amp;keyword)
     {
         const QString identifier = QLatin1String(iface) + QLatin1Char('_') + keyword;
         // load scripting language module from the information in identifier
         // and return it:
         return object;
     }
 };
</pre>
</p>
<p>
If you want to load a library use KPluginLoader.
The application that wants to instantiate plugin classes can do the following:
<pre class="fragment">
 KPluginFactory *factory = KPluginLoader("libraryname").factory();
 if (factory) {
     PluginInterface *p1 = factory-&gt;create&lt;PluginInterface&gt;(parent);
     OtherInterface *p2  = factory-&gt;create&lt;OtherInterface&gt;(parent);
     NextInterface *p3   = factory-&gt;create&lt;NextInterface&gt;("keyword1", parent);
     NextInterface *p3   = factory-&gt;create&lt;NextInterface&gt;("keyword2", parent);
 }
</pre>
</p>
<p>

<dl class="author" compact><dt><b>Author:</b></dt><dd> Matthias Kretz &lt;kretz@kde.org&gt; </dd></dl>

<dl class="author" compact><dt><b>Author:</b></dt><dd> Bernhard Loos &lt;nhuh.put@web.de&gt; </dd></dl>
</p>
<table border="0" cellpadding="0" cellspacing="0"><tr><td colspan="2"><br><h2>Signals</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#objectCreated">objectCreated</a> (QObject object)</td></tr>
<tr><td colspan="2"><br><h2>Methods</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#KPluginFactory">__init__</a> (self, QString componentName=0, QString catalogName=0, QObject parent=0)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#KPluginFactory">__init__</a> (self, <a href="../kdecore/KAboutData.html">KAboutData</a> aboutData, QObject parent=0)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#KPluginFactory">__init__</a> (self, <a href="../kdecore/KAboutData.html">KAboutData</a> aboutData, QObject parent=0)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#KPluginFactory">__init__</a> (self, QObject parent)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../kdecore/KComponentData.html">KComponentData</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#componentData">componentData</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QObject&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#create">create</a> (self, QObject parent=0, QString classname="QObject", QStringList args=QStringList())</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QObject&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#create">create</a> (self, QString iface, QWidget parentWidget, QObject parent, [QVariant] args, QString keyword)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QObject&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#createObject">createObject</a> (self, QObject parent, QString className, QStringList args)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#setComponentData">setComponentData</a> (self, <a href="../kdecore/KComponentData.html">KComponentData</a> componentData)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#setupTranslations">setupTranslations</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">[QVariant]&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#stringListToVariantList">stringListToVariantList</a> (self, QStringList list)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QStringList&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#variantListToStringList">variantListToStringList</a> (self, [QVariant] list)</td></tr>
</table>
<hr><h2>Signal Documentation</h2><a class="anchor" name="objectCreated"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> objectCreated</td>
<td>(</td>
<td class="paramtype">QObject&nbsp;</td>
<td class="paramname"><em>object</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><dl compact><dt><b>Signal syntax:</b></dt><dd><code>QObject.connect(source, SIGNAL("objectCreated(QObject*)"), target_slot)</code></dd></dl></div></div><hr><h2>Method Documentation</h2><a class="anchor" name="KPluginFactory"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">__init__</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString&nbsp;</td>
<td class="paramname"><em>componentName=0</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString&nbsp;</td>
<td class="paramname"><em>catalogName=0</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QObject&nbsp;</td>
<td class="paramname"><em>parent=0</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>This constructor creates a factory for a plugin with the given <b>componentName</b> and
<b>catalogName.</b> Those values are used to initialize a KComponentData object for the plugin.
You can later access it with componentData(). If <b>componentName</b> is 0, an invalid KComponentData
object will be created.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>componentName</em>&nbsp;</td><td> the component name of the plugin
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>catalogName</em>&nbsp;</td><td> the translation catalog to use
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>parent</em>&nbsp;</td><td> a parent object
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="KPluginFactory"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">__init__</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../kdecore/KAboutData.html">KAboutData</a>&nbsp;</td>
<td class="paramname"><em>aboutData</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QObject&nbsp;</td>
<td class="paramname"><em>parent=0</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p><dl class="deprecated" compact><dt><b>Deprecated:</b></dt><dd>
</dd></dl>
</p></div></div><a class="anchor" name="KPluginFactory"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">__init__</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../kdecore/KAboutData.html">KAboutData</a>&nbsp;</td>
<td class="paramname"><em>aboutData</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QObject&nbsp;</td>
<td class="paramname"><em>parent=0</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p><dl class="deprecated" compact><dt><b>Deprecated:</b></dt><dd>
</dd></dl>
</p></div></div><a class="anchor" name="KPluginFactory"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">__init__</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QObject&nbsp;</td>
<td class="paramname"><em>parent</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p><dl class="deprecated" compact><dt><b>Deprecated:</b></dt><dd>
</dd></dl>
</p></div></div><a class="anchor" name="componentData"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../kdecore/KComponentData.html">KComponentData</a> componentData</td>
<td>(</td>
<td class="paramtype">&nbsp;</td>
<td class="paramname"><em>self</em>&nbsp;)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>You can use this method to get the component data of the plugin. It is filled with the
information given to the constructor of KPluginFactory.
The K_PLUGIN_FACTORY macros provide a static version of this method, this can be used from
any place within the plugin.
</p>
<p>
Only use this method if you specified a componentData name or instance to the factory
constructor or to setComponentData.
Otherwise you get an invalid KComponentData, which will crash if used.
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> The KComponentData for the plugin
</dd></dl>
</p></div></div><a class="anchor" name="create"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">QObject create</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QObject&nbsp;</td>
<td class="paramname"><em>parent=0</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString&nbsp;</td>
<td class="paramname"><em>classname="QObject"</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QStringList&nbsp;</td>
<td class="paramname"><em>args=QStringList()</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>This function is called when the factory asked to create an Object.
</p>
<p>
You may reimplement it to provide a very flexible factory. This is especially useful to
provide generic factories for plugins implemeted using a scripting language.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>iface</em>&nbsp;</td><td> The staticMetaObject.className() string identifying the plugin interface that
was requested. E.g. for KCModule plugins this string will be "KCModule".
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>parentWidget</em>&nbsp;</td><td> Only used if the requested plugin is a KPart.
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>parent</em>&nbsp;</td><td> The parent object for the plugin object.
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>args</em>&nbsp;</td><td> A plugin specific list of arbitrary arguments.
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>keyword</em>&nbsp;</td><td> A string that uniquely identifies the plugin. If a KService is used this
keyword is read from the X-KDE-PluginKeyword entry in the .desktop file.
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="create"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">QObject create</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString&nbsp;</td>
<td class="paramname"><em>iface</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QWidget&nbsp;</td>
<td class="paramname"><em>parentWidget</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QObject&nbsp;</td>
<td class="paramname"><em>parent</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">[QVariant]&nbsp;</td>
<td class="paramname"><em>args</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString&nbsp;</td>
<td class="paramname"><em>keyword</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>This function is called when the factory asked to create an Object.
</p>
<p>
You may reimplement it to provide a very flexible factory. This is especially useful to
provide generic factories for plugins implemeted using a scripting language.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>iface</em>&nbsp;</td><td> The staticMetaObject.className() string identifying the plugin interface that
was requested. E.g. for KCModule plugins this string will be "KCModule".
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>parentWidget</em>&nbsp;</td><td> Only used if the requested plugin is a KPart.
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>parent</em>&nbsp;</td><td> The parent object for the plugin object.
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>args</em>&nbsp;</td><td> A plugin specific list of arbitrary arguments.
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>keyword</em>&nbsp;</td><td> A string that uniquely identifies the plugin. If a KService is used this
keyword is read from the X-KDE-PluginKeyword entry in the .desktop file.
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="createObject"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">QObject createObject</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QObject&nbsp;</td>
<td class="paramname"><em>parent</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString&nbsp;</td>
<td class="paramname"><em>className</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QStringList&nbsp;</td>
<td class="paramname"><em>args</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p><dl class="deprecated" compact><dt><b>Deprecated:</b></dt><dd>
</dd></dl>
</p></div></div><a class="anchor" name="setComponentData"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setComponentData</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../kdecore/KComponentData.html">KComponentData</a>&nbsp;</td>
<td class="paramname"><em>componentData</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>This method sets the component data of the plugin. You can access the component data object
later with componentData().
Normally you don't have to call this, because the factory constructs a component data object
from the information given to the constructor.
The object is destroyed, when the module containing the plugin is unloaded. Normally this happens
only on application shutdown.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>componentData</em>&nbsp;</td><td> the new KComponentData object
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="setupTranslations"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setupTranslations</td>
<td>(</td>
<td class="paramtype">&nbsp;</td>
<td class="paramname"><em>self</em>&nbsp;)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"></div></div><a class="anchor" name="stringListToVariantList"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">[QVariant] stringListToVariantList</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QStringList&nbsp;</td>
<td class="paramname"><em>list</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p><dl class="internal" compact><dt><b>Internal:</b></dt><dd>
Converts a QStringList to a QVariantList
</dd></dl>
</p></div></div><a class="anchor" name="variantListToStringList"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">QStringList variantListToStringList</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">[QVariant]&nbsp;</td>
<td class="paramname"><em>list</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p><dl class="internal" compact><dt><b>Internal:</b></dt><dd>
Converts a QVariantList of strings to a QStringList
</dd></dl>
</p></div></div>
</div>
</div>
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