train destinations

local button         = {}
local side           = "front"
local mon            = peripheral.wrap("monitor_15")
local textScale      = 1
local trackreset     = "back"

------------ color variables ------------

local btnTextColor   = colors.black
local defaultBgColor = colors.black
local headerColor    = colors.green

-----------------------------------------
rs.setBundledOutput(side, 0)
term.clear()
term.setCursorPos(1,1)
mon.setBackgroundColor(defaultBgColor)
mon.setTextScale(textScale)
mon.clear()

function fillTable()
   setTable("End",         switchOutput,  2, 9,  3,  5, colors.white,     colors.lightGray,    colors.green)
   setTable("Nether",      switchOutput,  2, 9,  7,  9, colors.orange,    colors.lightGray,    colors.green)
   setTable("Desti 3",     switchOutput,  2, 9, 11, 13, colors.magenta,   colors.lightGray,    colors.green)
   setTable("Desti 4",     switchOutput,  2, 9, 15, 17, colors.lightBlue, colors.lightGray,    colors.green)
   setTable("Desti 5",     switchOutput, 11, 19,  3,  5, colors.yellow,    colors.lightGray,    colors.green)
   setTable("Desti 6",     switchOutput, 11, 19,  7,  9, colors.lime,      colors.lightGray,    colors.green)
   setTable("Desti 7",     switchOutput, 11, 19, 11, 13, colors.pink,      colors.lightGray,    colors.green)
   setTable("Desti 8",     switchOutput, 11, 19, 15, 17, colors.gray,      colors.lightGray,    colors.green)
   setTable("Desti 9",     switchOutput, 21, 28,  3,  5, colors.lightGray, colors.lightGray,    colors.green)
   setTable("Desti 10",    switchOutput, 21, 28,  7,  9, colors.cyan,      colors.lightGray,    colors.green)
   setTable("Desti 11",    switchOutput, 21, 28, 11, 13, colors.purple,    colors.lightGray,    colors.green)
   setTable("Desti 12",    switchOutput, 21, 28, 15, 17, colors.blue,      colors.lightGray,    colors.green)
---   setTable("empty",      switchOutput, 59, 69,  3,  5, colors.brown,     colors.lightGray,    colors.green)
---   setTable("empty",         switchOutput, 59, 69,  7,  9, colors.green,     colors.lightGray,    colors.green)
---   setTable("empty",         switchOutput, 59, 69, 11, 13, colors.red,       colors.lightGray,    colors.green)
---   setTable("empty",     switchOutput, 59, 69, 15, 17, colors.black,     colors.lightGray,    colors.green)
---   setTable("All ON",       turnAllOn,      3, 13,  3,  9, "" ,             colors.green, colors.green)
---   setTable("All OFF",      turnAllOff,     3, 13, 11, 17, "" ,             colors.lightGray, colors.lightGray)
end

function setTable(name, func, xmin, xmax, ymin, ymax, color, btnOff, btnOn)
   button[name]           = {}
   button[name]["func"]   = func
   button[name]["active"] = false
   button[name]["xmin"]   = xmin
   button[name]["ymin"]   = ymin
   button[name]["xmax"]   = xmax
   button[name]["ymax"]   = ymax
   button[name]["color"]  = color
   button[name]["btnOff"] = btnOff
   button[name]["btnOn"]  = btnOn
end

function switchOutput(color)
   if rs.testBundledInput(side, color) then
     rs.setBundledOutput(side, (rs.getBundledInput(side)-color))
   else
     rs.setBundledOutput(side, (rs.getBundledInput(side)+color))
   end
   rs.setOutput( "right", true)
   sleep(.1)
   rs.setOutput("right", false)
end

function fill(text, color, bData)
   mon.setBackgroundColor(color)
   mon.setTextColor(btnTextColor)
   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(defaultBgColor)
end

function screen()
   local currColor
   for name,data in pairs(button) do
      local on = data["active"]
      if on == true then currColor = data["btnOn"] else currColor = data["btnOff"] end
      fill(name, currColor, data)
   end
end

function checkxy(x, y)
   for name, data in pairs(button) do
      if y>=data["ymin"] and  y <= data["ymax"] then
         if x>=data["xmin"] and x<= data["xmax"] then
            data["func"](button[name]["color"])
            data["active"] = not data["active"]
         end
      end
   end
end

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

fillTable()
while true do
   mon.clear()
   heading("Select Destination")
   screen()

   local e,side,x,y = os.pullEvent("monitor_touch")
   checkxy(x,y)
   mon.clear()
   heading("Enjoy your ride!")
   screen()

   local e,redstone = os.pullEvent("redstone")
    if rs.getInput("back") == true then
     rs.setBundledOutput("front", 0)
     for name, data in pairs(button) do
      data["active"] = false
      mon.clear()
     heading("Select Destination")
     screen()
     end
    end

   sleep(.1)
end