Function createSubmenuItem

include/helpers.hpp:337–352

*/
template <class TMenuItem = ui::MenuItem>
TMenuItem* createSubmenuItem(std::string text, std::string rightText, std::function<void(ui::Menu* menu)> createMenu, bool disabled = false) {
	struct Item : TMenuItem {
		std::function<void(ui::Menu* menu)> createMenu;

		ui::Menu* createChildMenu() override {
			ui::Menu* menu = new ui::Menu;
			createMenu(menu);
			return menu;
		}
	};

	Item* item = createMenuItem<Item>(text, rightText + (rightText.empty() ? "" : "  ") + RIGHT_ARROW);
	item->createMenu = createMenu;
	item->disabled = disabled;
	return item;
}


/** Creates a MenuItem that when hovered, opens a submenu with several MenuItems indexed by an integer.