mainmenu.lua

			dump(engine.setting_getbool("creative_mode")) .. "]"..
			"checkbox[0.5,0.7;cb_enable_damage;".. fgettext("Enable Damage") .. ";" ..
			dump(engine.setting_getbool("enable_damage")) .. "]"..
			"textlist[4,0.25;7.5,3.7;sp_worlds;" ..
			menu.render_world_list() ..
			";" .. index .. "]" ..
			menubar.formspec
end

--------------------------------------------------------------------------------
function tabbuilder.tab_texture_packs()
	local retval = "label[4,-0.25;".. fgettext("Select texture pack:") .. "]"..
			"vertlabel[0,-0.25;".. fgettext("TEXTURE PACKS") .. "]" ..
			"textlist[4,0.25;7.5,5.0;TPs;"

	local current_texture_path = engine.setting_get("texture_path")	
	local list = filter_texture_pack_list(engine.get_dirlist(engine.get_texturepath(), true))	
	local index = tonumber(engine.setting_get("mainmenu_last_selected_TP"))
	
	if index == nil then index = 1 end
	
	if current_texture_path == "" then
		retval = retval ..
			menu.render_texture_pack_list(list) ..
			";" .. index .. "]"
		return retval
	end
	
	local infofile = current_texture_path ..DIR_DELIM.."info.txt"
	local infotext = ""
	local f = io.open(infofile, "r")
	if f==nil then
		infotext = fgettext("No information available")
	else
		infotext = f:read("*all")
		f:close()
	end
	
	local screenfile = current_texture_path..DIR_DELIM.."screenshot.png"
	local no_screenshot = nil
	if not file_exists(screenfile) then
		screenfile = nil
		no_screenshot = engine.get_texturepath()..DIR_DELIM..
					"base"..DIR_DELIM.."pack"..DIR_DELIM.."no_screenshot.png"
	end

	return	retval ..
			menu.render_texture_pack_list(list) ..
			";" .. index .. "]" ..
			"image[0.65,0.25;4.0,3.7;"..engine.formspec_escape(screenfile or no_screenshot).."]"..
			"textarea[1.0,3.25;3.7,1.5;;"..engine.formspec_escape(infotext or "")..";]"
end

--------------------------------------------------------------------------------
function tabbuilder.tab_credits()
	local logofile = menu.defaulttexturedir .. "logo.png"
	return	"vertlabel[0,-0.5;CREDITS]" ..
			"label[0.5,3;Minetest " .. engine.get_version() .. "]" ..
			"label[0.5,3.3;http://minetest.net]" .. 
			"image[0.5,1;" .. engine.formspec_escape(logofile) .. "]" ..
			"textlist[3.5,-0.25;8.5,5.8;list_credits;" ..
			"#FFFF00" .. fgettext("Core Developers") .."," ..
			"Perttu Ahola (celeron55) <celeron55@gmail.com>,"..
			"Ryan Kwolek (kwolekr) <kwolekr@minetest.net>,"..
			"PilzAdam <pilzadam@minetest.net>," ..
			"Ilya Zhuravlev (xyz) <xyz@minetest.net>,"..
			"Lisa Milne (darkrose) <lisa@ltmnet.com>,"..
			"Maciej Kasatkin (RealBadAngel) <mk@realbadangel.pl>,"..
			"proller <proler@gmail.com>,"..
			"sfan5 <sfan5@live.de>,"..
			"kahrl <kahrl@gmx.net>,"..
			","..
			"#FFFF00" .. fgettext("Active Contributors") .. "," ..
			"sapier,"..
			"Vanessa Ezekowitz (VanessaE) <vanessaezekowitz@gmail.com>,"..
			"Jurgen Doser (doserj) <jurgen.doser@gmail.com>,"..
			"Jeija <jeija@mesecons.net>,"..
			"MirceaKitsune <mirceakitsune@gmail.com>,"..
			"ShadowNinja,"..
			"dannydark <the_skeleton_of_a_child@yahoo.co.uk>,"..
			"0gb.us <0gb.us@0gb.us>,"..
			"," ..
			"#FFFF00" .. fgettext("Previous Contributors") .. "," ..
			"Guiseppe Bilotta (Oblomov) <guiseppe.bilotta@gmail.com>,"..
			"Jonathan Neuschafer <j.neuschaefer@gmx.net>,"..
			"Nils Dagsson Moskopp (erlehmann) <nils@dieweltistgarnichtso.net>,"..
			"Constantin Wenger (SpeedProg) <constantin.wenger@googlemail.com>,"..
			"matttpt <matttpt@gmail.com>,"..
			"JacobF <queatz@gmail.com>,"..
			";0;true]"
end

--------------------------------------------------------------------------------
function tabbuilder.checkretval(retval)

	if retval ~= nil then
		if retval.current_tab ~= nil then
			tabbuilder.current_tab = retval.current_tab
		end
		
		if retval.is_dialog ~= nil then
			tabbuilder.is_dialog = retval.is_dialog
		end
		
		if retval.show_buttons ~= nil then
			tabbuilder.show_buttons = retval.show_buttons
		end
		
		if retval.skipformupdate ~= nil then
			tabbuilder.skipformupdate = retval.skipformupdate
		end
	end
end

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- initialize callbacks
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
engine.button_handler = function(fields)
	--print("Buttonhandler: tab: " .. tabbuilder.current_tab .. " fields: " .. dump(fields))
	
	if fields["btn_error_confirm"] then
		gamedata.errormessage = nil
	end
	
	local retval = modmgr.handle_buttons(tabbuilder.current_tab,fields)
	tabbuilder.checkretval(retval)
	
	retval = gamemgr.handle_buttons(tabbuilder.current_tab,fields)
	tabbuilder.checkretval(retval)
	
	retval = modstore.handle_buttons(tabbuilder.current_tab,fields)
	tabbuilder.checkretval(retval)
	
	if tabbuilder.current_tab == "dialog_create_world" then
		tabbuilder.handle_create_world_buttons(fields)
	end
	
	if tabbuilder.current_tab == "dialog_delete_world" then
		tabbuilder.handle_delete_world_buttons(fields)
	end
	
	if tabbuilder.current_tab == "singleplayer" then
		tabbuilder.handle_singleplayer_buttons(fields)
	end
	
	if tabbuilder.current_tab == "texture_packs" then
		tabbuilder.handle_texture_pack_buttons(fields)
	end
	
	if tabbuilder.current_tab == "multiplayer" then
		tabbuilder.handle_multiplayer_buttons(fields)
	end
	
	if tabbuilder.current_tab == "settings" then
		tabbuilder.handle_settings_buttons(fields)
	end
	
	if tabbuilder.current_tab == "server" then
		tabbuilder.handle_server_buttons(fields)
	end
	
	--tab buttons
	tabbuilder.handle_tab_buttons(fields)
	
	--menubar buttons
	menubar.handle_buttons(fields)
	
	if not tabbuilder.skipformupdate then
		--update menu
		update_menu()
	else
		tabbuilder.skipformupdate = false
	end
end

--------------------------------------------------------------------------------
engine.event_handler = function(event)
	if event == "MenuQuit" then
		if tabbuilder.is_dialog then
			tabbuilder.is_dialog = false
			tabbuilder.show_buttons = true
			tabbuilder.current_tab = engine.setting_get("main_menu_tab")
			menu.update_gametype()
			update_menu()
		else
			engine.close()
		end
	end
end

--------------------------------------------------------------------------------
function menu.update_gametype(reset)
	if reset then
		mm_texture.reset()
		engine.set_topleft_text("")
		filterlist.set_filtercriteria(worldlist,nil)
	else
		local game = menu.lastgame()
		mm_texture.update(tabbuilder.current_tab,game)
		engine.set_topleft_text(game.name)
		filterlist.set_filtercriteria(worldlist,game.id)
	end
end

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- menu startup
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
init_globals()
mm_texture.init()
menu.init()
tabbuilder.init()
menubar.refresh()
modstore.init()

engine.sound_play("main_menu", true)

update_menu()