New title screen now handles language changes.

After changing the language the title screen now directly shows the text
in the new language.

changelog

@@ -15,6 +15,8 @@ Version 1.9.0-svn:
      --new-widgets title screen
    * Added gui2 progress bar widget
    * Added "animated" logo to the --new-widgets title screen
+   * Fixed the language is refreshed after the language is changed in the
+     --new-widgets title screen
  * WML Engine:
    * Deprecated [set_variable]'s random key, use rand instead
    * Renamed [unit][status] healable to unhealable so it can default to 'no'

src/game.cpp

@@ -1312,8 +1312,6 @@ bool game_controller::change_language()
 			wm_title_string += " - " + game_config::revision;
 			SDL_WM_SetCaption(wm_title_string.c_str(), NULL);
 		}
-
-		t_string::reset_translations();
 	}
 
 	return true;

src/gui/dialogs/language_selection.cpp

@@ -73,6 +73,8 @@ void tlanguage_selection::post_show(twindow& window)
 		const std::vector<language_def>& languages = get_languages();
 		::set_language(languages[res]);
 		preferences::set_language(languages[res].localename);
+
+		t_string::reset_translations();
 	}
 }
 

src/gui/dialogs/title_screen.cpp

@@ -47,6 +47,19 @@ void show_dialog(CVideo& video)
 	dlg.show(video);
 }
 
+void show_language_dialog(CVideo& video, twindow& window)
+{
+	tlanguage_selection dlg;
+	dlg.show(video);
+	if(dlg.get_retval() == twindow::OK) {
+		/*
+		 * This call both reloads all texts in the new translation for the
+		 * widgets and then finds the new best layout in the new language.
+		 */
+		window.invalidate_layout();
+	}
+}
+
 } // namespace
 
 /*WIKI
@@ -105,7 +118,6 @@ static void animate_logo(
 	}
 }
 
-
 void ttitle_screen::pre_show(CVideo& video, twindow& window)
 {
 	assert(!video_);
@@ -124,11 +136,11 @@ void ttitle_screen::pre_show(CVideo& video, twindow& window)
 				  show_dialog<gui2::taddon_connect>
 				, boost::ref(video)));
 
-	// Note changing the language doesn't upate the title screen...
 	find_widget<tbutton>(&window, "language", false).
 			connect_signal_mouse_left_click(boost::bind(
-				  show_dialog<gui2::tlanguage_selection>
-				, boost::ref(video)));
+				  show_language_dialog
+				, boost::ref(video)
+				, boost::ref(window)));
 
 	/**** Set the tip of the day ****/
 	/*