States, Scenes, changes

gistfile1.lua

function setup()
    
    Scene("WELCOME",firs_page)
    Scene("GOO BYE",second_page)
    Scene.parameter()
end

function draw()
background(0)    
    Scene.draw()
end

function touched(touch)
    Scene.touched(touch)
end

---------------------
--> Usamos metatable
---------------------
Scene = {} --> Identificador para hacer llamado a las otras pantallas
scene = nil
scenes = {}
currentscene = nil
name_S = {}

setmetatable(Scene , { __call = function(_,name,funcion)
    
    if not currentscene then
        currentscene = 1
        scene = scenes[currentscene]
        end
        table.insert(scenes,funcion)
        name_S[name] = #scenes
        changes = nil
    end})

----------------------
--> PARAMETER.INTEGER
----------------------
Scene.parameter = function() parameter.integer("changes",1,#scenes,currentscene,
    
    function(var)
        Scene.change(var) end
    ) end

Scene.change = function(name)
    ActualScene = nil
    if type(name) == "string" then
        currentscene = name_S[name]
    end
    ActualScene = scenes[currentscene]
    ActualScene:init()
end

Scene.draw = function()
ActualScene:draw()    
end
Scene.touched = function(t)
    if ActualScene.touched then
        ActualScene:touched(t)
        end
    end

------------------------
--> SECOND CLASS
--> TO CALL A NEW STATE
------------------------

firs_page = class()

function firs_page:init()
    
end

function firs_page:draw()
    background(255)
end

function firs_page:touched(touch)
    if touch.state == ENDED then
        Scene.change("GOO BYE")
        end
end



second_page = class()

function second_page:init()
    
end

function second_page:draw()
    background(0)
end

function second_page:touched(touch)
    if touch.state == ENDED then
        Scene.change("WELCOME")
        end
end