Add "Help > Language" menu item to select language setting.

Makefile

@@ -172,7 +172,7 @@ else
 endif
 DIST_MD := $(wildcard *.md)
 DIST_HTML := $(patsubst %.md, build/%.html, $(DIST_MD))
-DIST_RES := res cacert.pem Core.json template.vcv LICENSE-GPLv3.txt $(DIST_HTML)
+DIST_RES := res cacert.pem Core.json template.vcv LICENSE-GPLv3.txt $(DIST_HTML) translations
 DIST_SDK_DIR := Rack-SDK
 DIST_SDK = Rack-SDK-$(VERSION)-$(ARCH_NAME).zip
 

include/string.hpp

@@ -133,6 +133,7 @@ struct Version {
 
 std::string translate(const std::string& id);
 std::string translate(const std::string& id, const std::string& language);
+std::vector<std::string> getLanguages();
 void init();
 
 

src/app/MenuBar.cpp

@@ -982,6 +982,24 @@ struct HelpButton : MenuButton {
 		menu->cornerFlags = BND_CORNER_TOP;
 		menu->box.pos = getAbsoluteOffset(math::Vec(0, box.size.y));
 
+		// Language
+		std::vector<std::string> languages = string::getLanguages();
+		std::vector<std::string> languageLabels;
+		for (const std::string& language : languages) {
+			languageLabels.push_back(string::translate("language", language));
+		}
+		menu->addChild(createIndexSubmenuItem("🌐 Language", languageLabels, [=]() {
+			auto it = std::find(languages.begin(), languages.end(), settings::language);
+			return it - languages.begin();
+		}, [=](size_t i) {
+			settings::language = get(languages, i, "en");
+			// Request restart
+			std::string msg = string::f("Rack must be restarted to change display language to %s. Restart Rack now?", string::translate("language").c_str());
+			if (osdialog_message(OSDIALOG_INFO, OSDIALOG_OK_CANCEL, msg.c_str())) {
+				APP->window->close();
+			}
+		}));
+
 		menu->addChild(createMenuItem("Tips", "", [=]() {
 			APP->scene->addChild(tipWindowCreate());
 		}));
@@ -1097,27 +1115,27 @@ struct MenuBar : widget::OpaqueWidget {
 		addChild(layout);
 
 		FileButton* fileButton = new FileButton;
-		fileButton->text = "File";
+		fileButton->text = string::translate("MenuBar.file");
 		layout->addChild(fileButton);
 
 		EditButton* editButton = new EditButton;
-		editButton->text = "Edit";
+		editButton->text = string::translate("MenuBar.edit");
 		layout->addChild(editButton);
 
 		ViewButton* viewButton = new ViewButton;
-		viewButton->text = "View";
+		viewButton->text = string::translate("MenuBar.view");
 		layout->addChild(viewButton);
 
 		EngineButton* engineButton = new EngineButton;
-		engineButton->text = "Engine";
+		engineButton->text = string::translate("MenuBar.engine");
 		layout->addChild(engineButton);
 
 		LibraryButton* libraryButton = new LibraryButton;
-		libraryButton->text = "Library";
+		libraryButton->text = string::translate("MenuBar.library");
 		layout->addChild(libraryButton);
 
 		HelpButton* helpButton = new HelpButton;
-		helpButton->text = "Help";
+		helpButton->text = string::translate("MenuBar.help");
 		layout->addChild(helpButton);
 
 		infoLabel = new InfoLabel;

src/string.cpp

@@ -383,7 +383,7 @@ std::string translate(const std::string& id) {
 
 
 std::string translate(const std::string& id, const std::string& language) {
-	auto it = translations.find(language);
+	const auto it = translations.find(language);
 	if (it == translations.end())
 		return "";
 
@@ -392,6 +392,19 @@ std::string translate(const std::string& id, const std::string& language) {
 }
 
 
+std::vector<std::string> getLanguages() {
+	std::vector<std::string> languages;
+	for (const auto& pair : translations) {
+		languages.push_back(pair.first);
+	}
+	// Sort by language name, by UTF-8 bytes
+	std::sort(languages.begin(), languages.end(), [](const std::string& a, const std::string& b) {
+		return translate("language", a) < translate("language", b);
+	});
+	return languages;
+}
+
+
 void init() {
 	loadTranslations();
 }

translations/en.json

@@ -1,3 +1,9 @@
 {
-	"language": "English"
+	"language": "English",
+	"MenuBar.file": "File",
+	"MenuBar.edit": "Edit",
+	"MenuBar.view": "View",
+	"MenuBar.engine": "Engine",
+	"MenuBar.library": "Library",
+	"MenuBar.help": "Help"
 }

translations/ja.json

@@ -0,0 +1,9 @@
+{
+	"language": "日本語",
+	"MenuBar.file": "ファイル",
+	"MenuBar.edit": "編集",
+	"MenuBar.view": "表示",
+	"MenuBar.engine": "エンジン",
+	"MenuBar.library": "ライブラリ",
+	"MenuBar.help": "ヘルプ"
+}