遍历文件添加到menu

       QMap<QString, QString> m = Languages::translations();
        QDir translation_dir = QApplication::applicationDirPath() + "/translations";
        QStringList languages = translation_dir.entryList( QStringList() << "*.qm");
        QRegExp rx_lang("touchdriver_(.*)\\.qm");

        for(int n=0; n < languages.size(); n++)
        {
            if (rx_lang.indexIn(languages[n]) > -1)
            {
                QString l = rx_lang.cap(1);
                QString text = l;
                if (m.contains(l)) text = m[l] + " ("+l+")";
                QAction *a = new QAction(text, this);
                a->setData(l);
                a->setCheckable(true);
                if(!g_pref->language.compare(l))
                {
                    a->setChecked(true);
                }
                connect(a , SIGNAL(triggered()), this, SLOT(setLanguage()));
                m_languageMenu->addAction(a);
            }
        }