Adds languages combo to preferences

nw/config.py

@@ -393,6 +393,16 @@ class Config:
 
         return
 
+    def listLanguages(self):
+        langs = dict(map(lambda lang: (lang, QLocale(lang).nativeLanguageName().title()),
+                         map(lambda v: v[0][3:],
+                             filter(lambda v: v[0].startswith("nw_") and v[1] == ".qm",
+                                    map(os.path.splitext, os.listdir(self.nwLangPath))))))
+        if "en" not in langs:
+            langs["en"] = QLocale("en").nativeLanguageName().title()
+
+        return sorted(langs.items(), key=lambda x: x[0])
+
     def loadConfig(self):
         """Load preferences from file and replace default settings.
         """

nw/gui/preferences.py

@@ -138,6 +138,23 @@ class GuiPreferencesGeneral(QWidget):
         # =============
         self.mainForm.addGroupLabel(self.tr("Look and Feel"))
 
+        ## Select Locale
+        self.guiLang = QComboBox()
+        self.guiLang.setMinimumWidth(self.mainConf.pxInt(200))
+        self.theLangs = self.mainConf.listLanguages()
+        print(self.theLangs)
+        for lang, langName in self.theLangs:
+            self.guiLang.addItem(langName, lang)
+        langIdx = self.guiLang.findData(self.mainConf.guiLang)
+        if langIdx != -1:
+            self.guiLang.setCurrentIndex(langIdx)
+
+        self.mainForm.addRow(
+            self.tr("Main GUI language"),
+            self.guiLang,
+            self.tr("Changing this requires restarting novelWriter.")
+        )
+
         ## Select Theme
         self.guiTheme = QComboBox()
         self.guiTheme.setMinimumWidth(self.mainConf.pxInt(200))
@@ -240,6 +257,7 @@ class GuiPreferencesGeneral(QWidget):
     def saveValues(self):
         """Save the values set for this tab.
         """
+        guiLang      = self.guiLang.currentData()
         guiTheme     = self.guiTheme.currentData()
         guiIcons     = self.guiIcons.currentData()
         guiDark      = self.guiDark.isChecked()
@@ -248,12 +266,14 @@ class GuiPreferencesGeneral(QWidget):
 
         # Check if restart is needed
         needsRestart = False
+        needsRestart |= self.mainConf.guiLang != guiLang
         needsRestart |= self.mainConf.guiTheme != guiTheme
         needsRestart |= self.mainConf.guiIcons != guiIcons
         needsRestart |= self.mainConf.guiDark != guiDark
         needsRestart |= self.mainConf.guiFont != guiFont
         needsRestart |= self.mainConf.guiFontSize != guiFontSize
 
+        self.mainConf.guiLang      = guiLang
         self.mainConf.guiTheme     = guiTheme
         self.mainConf.guiIcons     = guiIcons
         self.mainConf.guiDark      = guiDark