const QString NmsPluginExtensionName = "nmsclientplugin.qtplugin"; 

// ======== HELPER FUNCTIONS ========

/*!

  Creates list of folder paths where plug-ins can be loaded from.

  \return folder path list.

*/

QStringList NmUiExtensionManager::pluginFolders()

{

    NMLOG(QString("NmUiExtensionManager - HELPER FUNCTIONS - pluginFolders"));

    const QString NmSettingsPluginFolderPath("/resource/qt/plugins/nmail/uiext");

    QStringList pluginDirectories;

    QFileInfoList driveList = QDir::drives();

    foreach(const QFileInfo &driveInfo, driveList) {

        QString pluginDirectory =

            driveInfo.absolutePath() + NmSettingsPluginFolderPath;

        NMLOG(QString("fileInfo.absoluteFilePath() : %1").arg(pluginDirectory)); 

        if (QFileInfo(pluginDirectory).exists()) {

            pluginDirectories.append(pluginDirectory);

        }

    }

    NMLOG(QString("NmUiExtensionManager - HELPER FUNCTIONS - pluginFolders - OK"));

    return pluginDirectories;

}

    Loads plug-ins which implements NmUiExtensionInterface and are registered

    to <code>/resource/qt/plugins/nmail/uiext</code> folder.

    NMLOG(QString("NmUiExtensionManager::loadExtensionPlugins -->"));

    QStringList directories(pluginFolders());

    foreach (const QString &directoryPath, directories) {

        QDir directory(directoryPath);

        QFileInfoList fileList(directory.entryInfoList());

        foreach (const QFileInfo &fileInfo, fileList) {

            NMLOG(QString("Plugin absolute FilePath : %1").arg(fileInfo.absoluteFilePath()));  

            QScopedPointer<QPluginLoader> loader(

                new QPluginLoader(fileInfo.absoluteFilePath()));

            mPluginLoaders.append(loader.data());

            loader.take();

    NmUiExtensionInterface *interface = NULL;    

    foreach (QPluginLoader *loader, mPluginLoaders) {      

        NMLOG(QString("Plugin fileName() : %1").arg(loader->fileName()));

        QString fileName = loader->fileName();

        if (fileName.contains(NmsPluginExtensionName, Qt::CaseInsensitive) == false) {

            QObject *pluginInstance = loader->instance();

            interface = qobject_cast<NmUiExtensionInterface*>(pluginInstance);

            if (interface) {

                mExtensions.append(interface);

            }

    }            

    NMLOG(QString("<-- NmUiExtensionManager::loadExtensionPlugins"));