enhance lang-selection in OptionsDialog, when compiling with Qt >= 4.8

src/qt/optionsdialog.cpp

@@ -68,13 +68,23 @@ OptionsDialog::OptionsDialog(QWidget *parent) :
         /** check if the locale name consists of 2 parts (language_country) */
         if(langStr.contains("_"))
         {
+#if QT_VERSION >= 0x040800
+            /** display language strings as "native language - native country (locale name)", e.g. "Deutsch - Deutschland (de)" */
+            ui->lang->addItem(locale.nativeLanguageName() + QString(" - ") + locale.nativeCountryName() + QString(" (") + langStr + QString(")"), QVariant(langStr));
+#else
             /** display language strings as "language - country (locale name)", e.g. "German - Germany (de)" */
             ui->lang->addItem(QLocale::languageToString(locale.language()) + QString(" - ") + QLocale::countryToString(locale.country()) + QString(" (") + langStr + QString(")"), QVariant(langStr));
+#endif
         }
         else
         {
+#if QT_VERSION >= 0x040800
+            /** display language strings as "native language (locale name)", e.g. "Deutsch (de)" */
+            ui->lang->addItem(locale.nativeLanguageName() + QString(" (") + langStr + QString(")"), QVariant(langStr));
+#else
             /** display language strings as "language (locale name)", e.g. "German (de)" */
             ui->lang->addItem(QLocale::languageToString(locale.language()) + QString(" (") + langStr + QString(")"), QVariant(langStr));
+#endif
         }
     }