make language changeable

raven/plugins/ravenlogplugin.py

@@ -10,14 +10,20 @@ from raven.mainwindow import MainWindow
 from raven.pluginbase import PluginBase
 from raven.plugins.domain.menucontribution import MenuContribution
 from raven.plugins.domain.raction import RAction
+from raven.plugins.domain.rmenu import RMenu
 from raven.plugins.ravenlog.Tab import Tab
 from raven.i18n import _
+from settings import Settings
+
 
 class RavenLogPlugin(PluginBase):
     def __init__(self):
         super(RavenLogPlugin, self).__init__()
         self.main_window = None
 
+    def set_settings(self, settings: Settings):
+        self.settings = settings
+
     def create_main_window(self):
         if not self.main_window:
             self.main_window = MainWindow()
@@ -27,8 +33,22 @@ class RavenLogPlugin(PluginBase):
         return [
             MenuContribution("file", action=self._action_close(), action_id="close application", after="<last>"),
             MenuContribution("help", action=self._action_about(), action_id="open about dialog", after="<last>"),
+            MenuContribution("settings", menu=self._sub_menu_languages(), action_id="recent files menu"),
         ]
 
+    def _sub_menu_languages(self) -> RMenu:
+        menu = RMenu(_("&Languages"))
+        menu.add_action(RAction(_("&Default"), lambda: self._set_lang('')))
+        menu.add_action(RAction(_("&English"), lambda: self._set_lang('en')))
+        menu.add_action(RAction(_("&German"), lambda: self._set_lang('de')))
+        return menu
+
+    def _set_lang(self, lang: str):
+        if (lang == ''):
+            self.settings.session.remove_option('general', 'lang')
+        else:
+            self.settings.session.set('general', 'lang', lang)
+
     def current_file(self) -> Optional[str]:
         return self.main_window.tabs.current_file()