especificos-node/node/node.lua

--gl.setup(800,600)
gl.setup(1024,768)

local json = require "json"
local font = resource.load_font("silkscreen.ttf")
local cur_image = resource.load_image("/home/pi/especificos-node/node/1.png")
local state = "diapo"
local cur_preg = ""
local time = "0:0"
local img_prog="0/0"

node.alias("eba")

function decode_command(line)
    local cmd = json.decode(line)
	print(line)
	print(cmd.type)
	if cmd.type == "diapo" then
		cur_image:dispose()
		cur_image = resource.load_image(cmd.value)
		img_prog= cmd.progress
	elseif cmd.type == "pregunta" then
		cur_preg = cmd.preg	
	elseif cmd.type == "time" then
		time = cmd.time
		print(time)
	elseif cmd.type == "video" then
		-- ?
	elseif cmd.type == "switch" then
		state = cmd.new_state
	end
end

--node.event("input", decode_command) -- listen to TCP
node.event("data", decode_command)  -- listen to UDP
function node.render()
	if state == "diapo" then
		--cur_image:draw(0,0,WIDTH,HEIGHT)
        util.draw_correct(image, 0, 0, WIDTH, HEIGHT)
		font:write(WIDTH-70,HEIGHT-20,time,20,1,1,1,1)
		font:write(10,HEIGHT-20,img_prog,20,1,1,1,1)
	elseif state == "pregunta" then
		preguntas:draw(0,0,WIDTH,HEIGHT)
		font:write(120,320,cur_preg,20,1,1,1,1)
	end
end