ButtonAPI

local monitor = false
local mon

if monitor then

    for i,name in pairs(peripheral.getNames()) do

        for j,method in pairs(peripheral.getMethods(name)) do

            if (method == 'isColor') then

                mon = peripheral.wrap(name)
                mon.clear()
                mon.setTextScale(1)

                local x, y = mon.getSize()

                if x < 40 or y < 27 then

                    mon.setTextScale(0.5)

                else

                    mon.setTextScale(1)

                end

            end

        end

    end

else

    mon = term

end

local button={}
local color = {
    normale = {
        text = colors.black,
        background = colors.red
    },
    clicked = {
        text = colors.black,
        background = colors.lime
    }
}

mon.setTextColor(colors.white)
mon.setBackgroundColor(colors.black)

function clearTable()
   button = {}
end

function setShow(name, data)

    button[name]["show"] = data

end

function setTable(name, func, xmin, xmax, ymin, ymax, extra)
    button[name] = {}
    button[name]["func"] = func
    button[name]["extra"] = extra
    button[name]["active"] = false
    button[name]["show"] = true
    button[name]["xmin"] = xmin
    button[name]["ymin"] = ymin
    button[name]["xmax"] = xmax
    button[name]["ymax"] = ymax
end

function fill(text, backgroundcolor, textcolor, bData)
   mon.setBackgroundColor(backgroundcolor)
   mon.setTextColor(textcolor)
   local yspot = math.floor((bData["ymin"] + bData["ymax"]) /2)
   local xspot = math.floor((bData["xmax"] - bData["xmin"] - string.len(text)) /2) +1
   for j = bData["ymin"], bData["ymax"] do
      mon.setCursorPos(bData["xmin"], j)
      if j == yspot then
         for k = 0, bData["xmax"] - bData["xmin"] - string.len(text) +1 do
            if k == xspot then
               mon.write(text)
            else
               mon.write(" ")
            end
         end
      else
         for i = bData["xmin"], bData["xmax"] do
            mon.write(" ")
         end
      end
   end
   mon.setBackgroundColor(colors.black)
   mon.setTextColor(colors.white)
end

function screen()
   local background
   local text
   for name,data in pairs(button) do
      local on = data["active"]
      if mon.isColor then
        if on == true then
            background = color.clicked.background
            text =  color.clicked.text
        else
            background = color.normale.background
            text = color.normale.text
        end
      else
        if on == true then
            background = colors.white
            text = colors.black
        else
            background = colors.black
            text = colors.white
        end
      end
      if data["show"] then

        fill(name, background, text, data)

      end
   end
end

function toggleButton(name)
   button[name]["active"] = not button[name]["active"]
   screen()
end

function flash(name)
   toggleButton(name)
   screen()
   sleep(0.15)
   toggleButton(name)
   screen()
end

function checkxy(x, y)
   for name, data in pairs(button) do
    if data["show"] then
      if y>=data["ymin"] and  y <= data["ymax"] then
         if x>=data["xmin"] and x<= data["xmax"] then
            flash(name)
            if data["extra"] then
                data["func"](data["extra"])
            else
                data["func"]()
            end
            return true

         end
      end
    end
   end
   return false
end

function heading(text)
   w, h = mon.getSize()
   mon.setCursorPos((w-string.len(text))/2+1, 1)
   mon.write(text)
end

function label(w, h, text)
    mon.setCursorPos(w, h)
    mon.write(text)
end