ability to change language

raven/plugins/ravenlogplugin.py

@@ -1,8 +1,8 @@
 import sys
-from typing import Optional, Callable
+from typing import Optional, Callable, Dict
 
 from PySide6.QtCore import Qt
-from PySide6.QtWidgets import QDockWidget
+from PySide6.QtWidgets import QDockWidget, QMessageBox
 
 import constants
 from aboutdialog import AboutDialog
@@ -12,7 +12,7 @@ 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 raven.i18n import _, locale
 from settings import Settings
 
 
@@ -20,6 +20,9 @@ class RavenLogPlugin(PluginBase):
     def __init__(self):
         super(RavenLogPlugin, self).__init__()
         self.main_window = None
+        self._locale = locale
+        self._locale_actions = {}
+        self.settings = None
 
     def set_settings(self, settings: Settings):
         self.settings = settings
@@ -38,16 +41,36 @@ class RavenLogPlugin(PluginBase):
 
     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')))
+        self._locale_actions[''] = RAction(_("&Default"), lambda: self._change_locale(''), checkable=True)
+        self._locale_actions['en'] = RAction(_("&English"), lambda: self._change_locale('en'), checkable=True)
+        self._locale_actions['de'] = RAction(_("&German"), lambda: self._change_locale('de'), checkable=True)
+
+        for (key, action) in self._locale_actions.items():
+            action.checked = self._locale == key
+            menu.add_action(action)
+
+        if not self._locale in self._locale_actions.keys():
+            self._locale_actions[''].checked = True
         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 _change_locale(self, locale: str):
+        if self._locale != locale:
+            if self._locale in self._locale_actions:
+                self._locale_actions[self._locale].set_checked(False)
+
+            self._locale_actions[locale].set_checked(True)
+            self._locale = locale
+            if locale == '':
+                self.settings.session.remove_option('general', 'lang')
+            else:
+                self.settings.session.set('general', 'lang', locale)
+
+            info = QMessageBox(
+                QMessageBox.Icon.Information,
+                _("Language Changed"),
+                _("The language for this application has been changed. The change will take effect the next time the application is started."))
+            info.setStandardButtons(QMessageBox.Ok)
+            info.exec()
 
     def current_file(self) -> Optional[str]:
         return self.main_window.tabs.current_file()