First attempt to fix bug #11966,

it is now possible to change the language in the editor by pressing
alt-l. The only problem are the menu buttons, they will only show the
right language after a restart. I'm not sure if it'll be fixed before
the 1.0 release...propably not.

data/themes/editor.cfg

@@ -212,6 +212,14 @@ name=editor
         shift=no
         [/hotkey]
 
+	[hotkey]
+	command="changelanguage"
+	key="l"
+	cmd=no
+	alt=yes
+	shift=no
+	[/hotkey]
+
 #else
 	[hotkey]
 	command="zoomin"
@@ -412,6 +420,14 @@ name=editor
 	alt=no
 	shift=no
 	[/hotkey]
+
+	[hotkey]
+	command="changelanguage"
+	key="l"
+	ctrl=no
+	alt=yes
+	shift=no
+	[/hotkey]
 #endif
 
 

src/editor/editor.cpp

@@ -21,6 +21,7 @@
 #include "../game_config.hpp"
 #include "../gettext.hpp"
 #include "../key.hpp"
+#include "../language.hpp"
 #include "../widgets/menu.hpp"
 #include "../pathfind.hpp"
 #include "../playlevel.hpp"
@@ -42,6 +43,7 @@
 #include <cctype>
 #include <iostream>
 #include <map>
+#include <vector>
 #include <string>
 #include <cmath>
 
@@ -155,7 +157,7 @@ void map_editor::load_tooltips()
 		std::string text = "";
 
 		const std::vector<std::string> &menu_items = (*it).items();
-	if (menu_items.size() == 1) {
+		if (menu_items.size() == 1) {
 			if(menu_items.back() == "editdraw")
 				text = _("Draw tiles");
 			else if(menu_items.back() == "editfloodfill")
@@ -357,6 +359,39 @@ void map_editor::right_click(const gamemap::location hex_clicked ) {
 	}
 }
 
+// Set the language...
+void map_editor::change_language() {
+	std::vector<language_def> langdefs = get_languages();
+
+	// this only works because get_languages() returns a fresh vector at each calls
+	// unless show_gui cleans the "*" flag
+	const std::vector<language_def>::iterator current = std::find(langdefs.begin(),langdefs.end(),get_language());
+	if(current != langdefs.end()) {
+		(*current).language = "*" + (*current).language;
+	}
+
+	// prepare a copy with just the labels for the list to be displayed
+	std::vector<std::string> langs;
+	langs.reserve(langdefs.size());
+	std::transform(langdefs.begin(),langdefs.end(),std::back_inserter(langs),languagedef_name);
+
+	const int res = gui::show_dialog(gui_,NULL,_("Language"),
+	                         _("Choose your preferred language:"),
+	                         gui::OK_CANCEL,&langs);
+	if(size_t(res) < langs.size()) {
+		::set_language(known_languages[res]);
+		preferences::set_language(known_languages[res].localename);
+
+		game_config_.reset_translation();
+
+		// Reload tooltips and menu items
+		load_tooltips();
+	}
+
+	font::load_font_config();
+	hotkey::load_descriptions();
+}
+
 
 void map_editor::edit_save_as() {
 	const std::string default_dir =
@@ -698,6 +733,7 @@ bool map_editor::can_execute_command(hotkey::HOTKEY_COMMAND command) const {
 	case hotkey::HOTKEY_EDIT_SELECT_ALL:
 	case hotkey::HOTKEY_EDIT_DRAW:
 	case hotkey::HOTKEY_EDIT_REFRESH:
+	case hotkey::HOTKEY_LANGUAGE:
 		return true;
 	default:
 		return false;

src/editor/editor.hpp

@@ -91,6 +91,9 @@ public:
 	/// Recalculate layout and redraw everything.
 	void redraw_everything();
 
+	// Change the language in_game
+	virtual void change_language();
+
 	// Methods inherited from command_executor. Used to perform
 	// operations on menu/hotkey commands.
 	virtual void toggle_grid();

src/hotkeys.cpp

@@ -107,6 +107,8 @@ const struct {
 	{ hotkey::HOTKEY_CHAT_LOG, "chatlog", N_("View Chat Log"), false },
 	{ hotkey::HOTKEY_USER_CMD, "command", N_("Enter user command"), false },
 
+	{ hotkey::HOTKEY_LANGUAGE, "changelanguage", N_("Change language"), true },
+
 	{ hotkey::HOTKEY_NULL, NULL, NULL, true }
 };
 
@@ -644,6 +646,10 @@ void execute_command(display& disp, HOTKEY_COMMAND command, command_executor* ex
 			if(executor)
 				executor->edit_refresh();
 			break;
+		 case HOTKEY_LANGUAGE:
+			if(executor)
+				executor->change_language();
+			break;
 		default:
 			std::cerr << "command_executor: unknown command number " << command << ", ignoring.\n";
 			break;

src/hotkeys.hpp

@@ -41,7 +41,7 @@ enum HOTKEY_COMMAND {
 	HOTKEY_LABEL_TERRAIN, HOTKEY_SHOW_ENEMY_MOVES, HOTKEY_BEST_ENEMY_MOVES,
 	HOTKEY_DELAY_SHROUD, HOTKEY_UPDATE_SHROUD, HOTKEY_CONTINUE_MOVE,
 	HOTKEY_SEARCH, HOTKEY_SPEAK_ALLY, HOTKEY_SPEAK_ALL, HOTKEY_HELP,
-	HOTKEY_CHAT_LOG,
+	HOTKEY_CHAT_LOG, HOTKEY_LANGUAGE,
 
 	//editing specific commands
 	HOTKEY_EDIT_SET_TERRAIN,
@@ -162,6 +162,7 @@ public:
 	virtual void show_help() {}
 	virtual void show_chat_log() {}
 	virtual void user_command() {}
+	virtual void change_language() {}
 
 	// Map editor stuff.
 	virtual void edit_set_terrain() {}