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Minetest Lua Mainmenu API Reference 0.4.6
========================================

Introduction
-------------
The main menu is defined as a formspec by Lua in builtin/mainmenu.lua
Description of formspec language to show your menu is in lua_api.txt

Callbacks
---------
engine.buttonhandler(fields): called when a button is pressed.
^ fields = {name1 = value1, name2 = value2, ...}
engine.event_handler(event)
^ event: "MenuQuit", "KeyEnter", "ExitButton" or "EditBoxEnter"

Gamedata
--------
The "gamedata" table is read when calling engine.start(). It should contain:
{
	playername     = <name>,
	password       = <password>,
	address        = <IP/adress>,
	port           = <port>,
	selected_world = <index>, -- 0 for client mode
	singleplayer   = <true/false>,
}

Functions
---------
engine.start()
engine.close()

Filesystem:
engine.get_scriptdir()
^ returns directory of script
engine.get_modpath()
^ returns path to global modpath
engine.get_modstore_details(modid)
^ modid numeric id of mod in modstore
^ returns {
	id			= <numeric id of mod in modstore>,
	title		= <human readable title>,
	basename	= <basename for mod>,
	description = <description of mod>,
	author		= <author of mod>,
	download_url= <best match download url>,
	license		= <short description of license>,
	rating		= <float value of current rating>
}
engine.get_modstore_list()
^ returns {
	[1] = {
		id		 = <numeric id of mod in modstore>,
		title	 = <human readable title>,
		basename = <basename for mod>
	}
}
engine.get_gamepath()
^ returns path to global gamepath
engine.get_dirlist(path,onlydirs)
^ path to get subdirs from
^ onlydirs should result contain only dirs?
^ returns list of folders within path
engine.create_dir(absolute_path)
^ absolute_path to directory to create (needs to be absolute)
^ returns true/false
engine.delete_dir(absolute_path)
^ absolute_path to directory to delete (needs to be absolute)
^ returns true/false
engine.copy_dir(source,destination,keep_soure)
^ source folder
^ destination folder
^ keep_source DEFAULT true --> if set to false source is deleted after copying
^ returns true/false
engine.extract_zip(zipfile,destination) [unzip within path required]
^ zipfile to extract
^ destination folder to extract to
^ returns true/false
engine.download_file(url,target)
^ url to download
^ target to store to
^ returns true/false
engine.get_version()
^ returns current minetest version
engine.sound_play(spec, looped) -> handle
^ spec = SimpleSoundSpec (see lua-api.txt)
^ looped = bool
engine.sound_stop(handle)

GUI:
engine.update_formspec(formspec)
- engine.set_background(type, texturepath)
^ type: "background", "overlay", "header" or "footer"
engine.set_clouds(<true/false>)
engine.set_topleft_text(text)

Games:
engine.get_game(index)
^ returns {
	id               = <id>,
	path             = <full path to game>,
	gamemods_path    = <path>,
	name             = <name of game>,
	menuicon_path    = <full path to menuicon>,
	DEPRECATED:
	addon_mods_paths = {[1] = <path>,},
}
engine.get_games() -> table of all games in upper format

Favorites:
engine.get_favorites(location) -> list of favorites
^ location: "local" or "online"
^ returns {
	[1] = {
	clients       = <number of clients/nil>,
	clients_max   = <maximum number of clients/nil>,
	version       = <server version/nil>,
	password      = <true/nil>,
	creative      = <true/nil>,
	damage        = <true/nil>,
	pvp           = <true/nil>,
	description   = <server description/nil>,
	name          = <server name/nil>,
	address       = <address of server/nil>,
	port          = <port>
	},
}
engine.delete_favorite(id, location) -> success

Logging:
engine.debug(line)
^ Always printed to stderr and logfile (print() is redirected here)
engine.log(line)
engine.log(loglevel, line)
^ loglevel one of "error", "action", "info", "verbose"

Settings:
engine.setting_set(name, value)
engine.setting_get(name) -> string or nil
engine.setting_setbool(name, value)
engine.setting_getbool(name) -> bool or nil
engine.setting_save() -> nil, save all settings to config file

Worlds:
engine.get_worlds() -> list of worlds
^ returns {
	[1] = {
	path   = <full path to world>,
	name   = <name of world>,
	gameid = <gameid of world>,
	},
}
engine.create_world(worldname, gameid)
engine.delete_world(index)


UI:
engine.get_textlist_index(textlistname) -> index
engine.show_keys_menu()
engine.file_open_dialog(formname,caption)
^ shows a file open dialog
^ formname is base name of dialog response returned in fields
^     -if dialog was accepted "_accepted" 
^^       will be added to fieldname containing the path
^     -if dialog was canceled "_cancelled" 
^        will be added to fieldname value is set to formname itself
^ returns nil or selected file/folder

Helpers:
engine.formspec_escape(string) -> string
^ escapes characters [ ] \ , ; that can not be used in formspecs
engine.gettext(string) -> string
^ look up the translation of a string in the gettext message catalog
fgettext(string, ...) -> string
^ call engine.gettext(string), replace "$1"..."$9" with the given
^ extra arguments, call engine.formspec_escape and return the result
engine.parse_json(string[, nullvalue]) -> something
^ see minetest.parse_json (lua_api.txt)
dump(obj, dumped={})
^ Return object serialized as a string
string:split(separator)
^ eg. string:split("a,b", ",") == {"a","b"}
string:trim()
^ eg. string.trim("\n \t\tfoo bar\t ") == "foo bar"
minetest.is_yes(arg)
^ returns whether arg can be interpreted as yes

Class reference
----------------
Settings: see lua_api.txt
USA. local enable_gamebar = PLATFORM ~= "Android" local current_game, singleplayer_refresh_gamebar if enable_gamebar then function current_game() local last_game_id = core.settings:get("menu_last_game") local game = pkgmgr.find_by_gameid(last_game_id) return game end function singleplayer_refresh_gamebar() local old_bar = ui.find_by_name("game_button_bar") if old_bar ~= nil then old_bar:delete() end local function game_buttonbar_button_handler(fields) if fields.game_open_cdb then local maintab = ui.find_by_name("maintab") local dlg = create_store_dlg("game") dlg:set_parent(maintab) maintab:hide() dlg:show() return true end for key,value in pairs(fields) do for j=1,#pkgmgr.games,1 do if ("game_btnbar_" .. pkgmgr.games[j].id == key) then mm_texture.update("singleplayer", pkgmgr.games[j]) core.set_topleft_text(pkgmgr.games[j].name) core.settings:set("menu_last_game",pkgmgr.games[j].id) menudata.worldlist:set_filtercriteria(pkgmgr.games[j].id) local index = filterlist.get_current_index(menudata.worldlist, tonumber(core.settings:get("mainmenu_last_selected_world"))) if not index or index < 1 then local selected = core.get_textlist_index("sp_worlds") if selected ~= nil and selected < #menudata.worldlist:get_list() then index = selected else index = #menudata.worldlist:get_list() end end menu_worldmt_legacy(index) return true end end end end local btnbar = buttonbar_create("game_button_bar", game_buttonbar_button_handler, {x=-0.3,y=5.9}, "horizontal", {x=12.4,y=1.15}) for i=1,#pkgmgr.games,1 do local btn_name = "game_btnbar_" .. pkgmgr.games[i].id local image = nil local text = nil local tooltip = core.formspec_escape(pkgmgr.games[i].name) if pkgmgr.games[i].menuicon_path ~= nil and pkgmgr.games[i].menuicon_path ~= "" then image = core.formspec_escape(pkgmgr.games[i].menuicon_path) else local part1 = pkgmgr.games[i].id:sub(1,5) local part2 = pkgmgr.games[i].id:sub(6,10) local part3 = pkgmgr.games[i].id:sub(11) text = part1 .. "\n" .. part2 if part3 ~= nil and part3 ~= "" then text = text .. "\n" .. part3 end end btnbar:add_button(btn_name, text, image, tooltip) end local plus_image = core.formspec_escape(defaulttexturedir .. "plus.png") btnbar:add_button("game_open_cdb", "", plus_image, fgettext("Install games from ContentDB")) end else function current_game() return nil end end local function get_formspec(tabview, name, tabdata) local retval = "" local index = filterlist.get_current_index(menudata.worldlist, tonumber(core.settings:get("mainmenu_last_selected_world")) ) retval = retval .. "button[3.9,3.8;2.8,1;world_delete;".. fgettext("Delete") .. "]" .. "button[6.55,3.8;2.8,1;world_configure;".. fgettext("Select Mods") .. "]" .. "button[9.2,3.8;2.8,1;world_create;".. fgettext("New") .. "]" .. "label[3.9,-0.05;".. fgettext("Select World:") .. "]".. "checkbox[0,-0.20;cb_creative_mode;".. fgettext("Creative Mode") .. ";" .. dump(core.settings:get_bool("creative_mode")) .. "]".. "checkbox[0,0.25;cb_enable_damage;".. fgettext("Enable Damage") .. ";" .. dump(core.settings:get_bool("enable_damage")) .. "]".. "checkbox[0,0.7;cb_server;".. fgettext("Host Server") ..";" .. dump(core.settings:get_bool("enable_server")) .. "]" .. "textlist[3.9,0.4;7.9,3.45;sp_worlds;" .. menu_render_worldlist() .. ";" .. index .. "]" if core.settings:get_bool("enable_server") then retval = retval .. "button[7.9,4.75;4.1,1;play;".. fgettext("Host Game") .. "]" .. "checkbox[0,1.15;cb_server_announce;" .. fgettext("Announce Server") .. ";" .. dump(core.settings:get_bool("server_announce")) .. "]" .. "field[0.3,2.85;3.8,0.5;te_playername;" .. fgettext("Name") .. ";" .. core.formspec_escape(core.settings:get("name")) .. "]" .. "pwdfield[0.3,4.05;3.8,0.5;te_passwd;" .. fgettext("Password") .. "]" local bind_addr = core.settings:get("bind_address") if bind_addr ~= nil and bind_addr ~= "" then retval = retval .. "field[0.3,5.25;2.5,0.5;te_serveraddr;" .. fgettext("Bind Address") .. ";" .. core.formspec_escape(core.settings:get("bind_address")) .. "]" .. "field[2.85,5.25;1.25,0.5;te_serverport;" .. fgettext("Port") .. ";" .. core.formspec_escape(core.settings:get("port")) .. "]" else retval = retval .. "field[0.3,5.25;3.8,0.5;te_serverport;" .. fgettext("Server Port") .. ";" .. core.formspec_escape(core.settings:get("port")) .. "]" end else retval = retval .. "button[7.9,4.75;4.1,1;play;" .. fgettext("Play Game") .. "]" end return retval end local function main_button_handler(this, fields, name, tabdata) assert(name == "local") local world_doubleclick = false if fields["sp_worlds"] ~= nil then local event = core.explode_textlist_event(fields["sp_worlds"]) local selected = core.get_textlist_index("sp_worlds") menu_worldmt_legacy(selected) if event.type == "DCL" then world_doubleclick = true end if event.type == "CHG" and selected ~= nil then core.settings:set("mainmenu_last_selected_world", menudata.worldlist:get_raw_index(selected)) return true end end if menu_handle_key_up_down(fields,"sp_worlds","mainmenu_last_selected_world") then return true end if fields["cb_creative_mode"] then core.settings:set("creative_mode", fields["cb_creative_mode"]) local selected = core.get_textlist_index("sp_worlds") menu_worldmt(selected, "creative_mode", fields["cb_creative_mode"]) return true end if fields["cb_enable_damage"] then core.settings:set("enable_damage", fields["cb_enable_damage"]) local selected = core.get_textlist_index("sp_worlds") menu_worldmt(selected, "enable_damage", fields["cb_enable_damage"]) return true end if fields["cb_server"] then core.settings:set("enable_server", fields["cb_server"]) return true end if fields["cb_server_announce"] then core.settings:set("server_announce", fields["cb_server_announce"]) local selected = core.get_textlist_index("srv_worlds") menu_worldmt(selected, "server_announce", fields["cb_server_announce"]) return true end if fields["play"] ~= nil or world_doubleclick or fields["key_enter"] then local selected = core.get_textlist_index("sp_worlds") gamedata.selected_world = menudata.worldlist:get_raw_index(selected) if selected == nil or gamedata.selected_world == 0 then gamedata.errormessage = fgettext("No world created or selected!") return true end -- Update last game local world = menudata.worldlist:get_raw_element(gamedata.selected_world) if world then local game = pkgmgr.find_by_gameid(world.gameid) core.settings:set("menu_last_game", game.id) end if core.settings:get_bool("enable_server") then gamedata.playername = fields["te_playername"] gamedata.password = fields["te_passwd"] gamedata.port = fields["te_serverport"] gamedata.address = "" core.settings:set("port",gamedata.port) if fields["te_serveraddr"] ~= nil then core.settings:set("bind_address",fields["te_serveraddr"]) end else gamedata.singleplayer = true end core.start() return true end if fields["world_create"] ~= nil then local create_world_dlg = create_create_world_dlg(true) create_world_dlg:set_parent(this) this:hide() create_world_dlg:show() mm_texture.update("singleplayer", current_game()) return true end if fields["world_delete"] ~= nil then local selected = core.get_textlist_index("sp_worlds") if selected ~= nil and selected <= menudata.worldlist:size() then local world = menudata.worldlist:get_list()[selected] if world ~= nil and world.name ~= nil and world.name ~= "" then local index = menudata.worldlist:get_raw_index(selected) local delete_world_dlg = create_delete_world_dlg(world.name,index) delete_world_dlg:set_parent(this) this:hide() delete_world_dlg:show() mm_texture.update("singleplayer",current_game()) end end return true end if fields["world_configure"] ~= nil then local selected = core.get_textlist_index("sp_worlds") if selected ~= nil then local configdialog =