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/usr/include/ksettings/pluginpage.h is in kdelibs5-dev 4:4.14.16-0ubuntu3.

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/*  This file is part of the KDE project
    Copyright (C) 2003 Matthias Kretz <kretz@kde.org>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License version 2 as published by the Free Software Foundation.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.

*/

#ifndef KSETTINGS_PLUGINPAGE_H
#define KSETTINGS_PLUGINPAGE_H

#include <kcmodule.h>
#include <kcmutils_export.h>

class KPluginSelector;

namespace KSettings
{
    class PluginPagePrivate;

/**
 * @short Convenience KCModule for creating a plugins config page.
 *
 * This class makes it very easy to create a plugins configuration page to your
 * program. All you need to do is create a class that is derived from
 * PluginPage and add the appropriate plugin information to the KPluginSelector.
 * This is done using the pluginSelector() method:
 * \code
 * K_PLUGIN_FACTORY(MyAppPluginConfigFactory,
 *                  registerPlugin<MyAppPluginConfig>();
 *                  )
 * K_EXPORT_PLUGIN(MyAppConfigFactory("kcm_myapppluginconfig"));
 *
 * MyAppPluginConfig(QWidget * parent, const QVariantList & args)
 *     : PluginPage(MyAppPluginConfigFactory::componentData(), parent, args)
 * {
 *     pluginSelector()->addPlugins( KGlobal::mainComponent().componentName(), i18n( "General Plugins" ), "General" );
 *     pluginSelector()->addPlugins( KGlobal::mainComponent().componentName(), i18n( "Effects" ), "Effects" );
 * }
 * \endcode
 *
 * All that remains to be done is to create the appropriate .desktop file
 * \verbatim
   [Desktop Entry]
   Encoding=UTF-8
   Icon=plugin
   Type=Service
   ServiceTypes=KCModule

   X-KDE-Library=myapppluginconfig
   X-KDE-FactoryName=MyAppPluginConfigFactory
   X-KDE-ParentApp=myapp
   X-KDE-ParentComponents=myapp

   Name=Plugins
   Comment=Select and configure your plugins:
   \endverbatim
 *
 * @author Matthias Kretz <kretz@kde.org>
 */
class KCMUTILS_EXPORT PluginPage : public KCModule
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(PluginPage)
    public:
        /**
         * Standard KCModule constructor.
         * Automatically creates the KPluginSelector widget.
         */
        explicit PluginPage( const KComponentData &componentData,
                             QWidget *parent = 0,
                             const QVariantList &args = QVariantList() );

        ~PluginPage();

        /**
         * @return a reference to the KPluginSelector.
         */
        KPluginSelector * pluginSelector();

        /**
         * Load the state of the plugins (selected or not) from the KPluginInfo
         * objects. For KParts plugins everything should work automatically. For
         * your own type of plugins you might need to reimplement the
         * KPluginInfo::pluginLoaded() method. If that doesn't fit your needs
         * you can also reimplement this method.
         */
        virtual void load();

        /**
         * Save the state of the plugins to KConfig objects
         */
        virtual void save();
        virtual void defaults();

    protected:
        PluginPagePrivate *const d_ptr;

    private:
        Q_PRIVATE_SLOT(d_func(), void _k_reparseConfiguration(const QByteArray &a))
};

}

#endif // KSETTINGS_PLUGINPAGE_H