games/minimal/mods/default/textures/default_cactus_top.png

--Minetest
--Copyright (C) 2014 sapier
--
--This program is free software; you can redistribute it and/or modify
--it under the terms of the GNU Lesser General Public License as published by
--the Free Software Foundation; either version 2.1 of the License, or
--(at your option) any later version.
--
--This program is distributed in the hope that it will be useful,
--but WITHOUT ANY WARRANTY; without even the implied warranty of
--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--GNU Lesser General Public License for more details.
--
--You should have received a copy of the GNU Lesser General Public License along
--with this program; if not, write to the Free Software Foundation, Inc.,
--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

ui = {}
ui.childlist = {}
ui.default = nil

--------------------------------------------------------------------------------
function ui.add(child)
	--TODO check child
	ui.childlist[child.name] = child

	return child.name
end

--------------------------------------------------------------------------------
function ui.delete(child)

	if ui.childlist[child.name] == nil then
		return false
	end

	ui.childlist[child.name] = nil
	return true
end

--------------------------------------------------------------------------------
function ui.set_default(name)
	ui.default = name
end

--------------------------------------------------------------------------------
function ui.find_by_name(name)
	return ui.childlist[name]
end

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- Internal functions not to be called from user
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

function ui.update()
	local formspec = {}

	-- handle errors
	if gamedata ~= nil and gamedata.reconnect_requested then
		local error_message = core.formspec_escape(
				gamedata.errormessage or "<none available>")
		formspec = {
			"size[14,8]",
			"real_coordinates[true]",
			"box[0.5,1.2;13,5;#000]",
			("textarea[0.5,1.2;13,5;;%s;%s]"):format(
				fgettext("The server has requested a reconnect:"), error_message),
			"button[2,6.6;4,1;btn_reconnect_yes;" .. fgettext("Reconnect") .. "]",
			"button[8,6.6;4,1;btn_reconnect_no;" .. fgettext("Main menu") .. "]"
		}
	elseif gamedata ~= nil and gamedata.errormessage ~= nil then
		local error_message = core.formspec_escape(gamedata.errormessage)

		local error_title
		if string.find(gamedata.errormessage, "ModError") then
			error_title = fgettext("An error occurred in a Lua script:")
		else
			error_title = fgettext("An error occurred:")
		end
		formspec = {
			"size[14,8]",
			"real_coordinates[true]",
			"box[0.5,1.2;13,5;#000]",
			("textarea[0.5,1.2;13,5;;%s;%s]"):format(
				error_title, error_message),
			"button[5,6.6;4,1;btn_error_confirm;" .. fgettext("Ok") .. "]"
		}
	else
		local active_toplevel_ui_elements = 0
		for key,value in pairs(ui.childlist) do
			if (value.type == "toplevel") then
				local retval = value:get_formspec()
ofs	hex dump	ascii
0000	89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 00 10 00 00 00 10 01 03 00 00 00 25 3d 6d	.PNG........IHDR.............%=m
0020	22 00 00 00 06 50 4c 54 45 00 00 00 4e 9a 06 bd ae de a0 00 00 00 2e 49 44 41 54 08 1d 05 c1 b1	"....PLTE...N..........IDAT.....
0040	0d 00 20 0c 04 b1 db fc b7 a2 41 4c c2 10 94 29 22 38 6c 2c 0c 91 12 17 53 6c 22 37 9c c6 a0 54	..........AL...)"8l,....Sl"7...T
0060	e1 63 8b e3 03 9b 94 1c 33 e6 5e 7d 37 00 00 00 00 49 45 4e 44 ae 42 60 82	.c......3.^}7....IEND.B`.