api button beta

--1.0 added centerTextXY and centerTextX for api by overwol
--2.0 added button colors background custom for click This button or not clicked
--2.1 recod api for optimizing api

 function centerTextXY(text,htext)
  local w,h = term.getSize()
  if htext == nil then
    htext = 0
  end
  local htext = tonumber(htext)
  term.setCursorPos(math.floor(w/2-text:len()/2+.5), math.floor(h/2+0.5+htext))
  io.write(text)
end

function centerTextX(text,htext)
  local w,h = term.getSize()
  term.setCursorPos(math.floor(w/2-text:len()/2+.5), htext)
  io.write(text)
end

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

function setTable(name, textl1, textl2, func, funcv, xmin, ymin, xmax, ymax, textColor, backgroundColorOn,  backgroundColorOff, active)
   button[name] = {}
   button[name]["textl1"] = textl1
   button[name]["textl2"] = textl2
   button[name]["func"] = func
   button[name]["funcv"] = funcv
   if active == nil then
      button[name]["active"] = false
   else
      button[name]["active"] = active
   end
   button[name]["xmin"] = xmin
   button[name]["ymin"] = ymin
   button[name]["xmax"] = xmax
   button[name]["ymax"] = ymax
   button[name]["textColor"] = textColor
   button[name]["backgroundColorOn"] = backgroundColorOn
   button[name]["backgroundColorOff"] = backgroundColorOff
end

function screen()
   local currColor
   for name,data in pairs(button) do
      term.setTextColor(data["textColor"] or colors.white)
      local on = data["active"]
      if on == false then
         currColor = data["backgroundColorOff"] or colors.red
      elseif on == true then
         currColor = data["backgroundColorOn"] or colors.lime
      end
      fill(name, currColor, data)
      end
end

function fill(name, color, bData)
   term.setBackgroundColor(color)
   local text1 = bData["textl1"]
   local text2 = bData["textl2"]
   local yspot = math.floor((bData["ymin"] + bData["ymax"]) /2)
   local yspot2 = math.floor((bData["ymin"] + bData["ymax"]) /2+1)
   local xspot = math.floor((bData["xmax"] - bData["xmin"] - string.len(text1)) /2) +1
   local xspot2 = math.floor((bData["xmax"] - bData["xmin"] - string.len(text2)) /2) +1
   for j = bData["ymin"], bData["ymax"] do
      term.setCursorPos(bData["xmin"], j)
      if j == yspot then
         for k = 0, bData["xmax"] - bData["xmin"] - string.len(text1) +1 do
            if k == xspot then
               term.write(text1)
            else
               term.write(" ")
            end
         end
      elseif j == yspot2 then
         for k = 0, bData["xmax"] - bData["xmin"] - string.len(text2) +1 do
            if k == xspot then
               term.write(text2)
            else
               term.write(" ")
            end
         end
       else
         for i = bData["xmin"], bData["xmax"] do
            term.write(" ")
         end
      end
   end
   term.setBackgroundColor(colors.black)
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 y>=data["ymin"] and  y <= data["ymax"] then
         if x>=data["xmin"] and x<= data["xmax"] then
            funcvar = data["funcv"]
            if funcvar == "" then
                data["func"]()
            else
                data["func"](data["funcv"])
            end
            return true
            --data["active"] = not data["active"]
            --print(name)
         end
      end
   end
   return false
end

function getClick()
        local event,side,x,y = os.pullEvent("monitor_touch")
        checkxy(x,y)
end