bolt

local pullEvent = os.pullEvent
os.pullEvent = os.pullEventRaw

term.clear()
w, h = term.getSize()
local selecteditem = 1
local side = 1
local step = 1
local running = false
mainmenu = {

[1] = {text = "cactus", id = 81, price = 100},
[2] = {text = "wool", id = 35, price = 100},
[3] = {text = "soul sand", id = 88, price = 250},
[4] = {text = "dispenser", id = 23, price = 250},
[5] = {text = "piston", id = 33, price = 150},
[6] = {text = "sticky piston", id = 29, price = 200},
[7] = {text = "ench table", id = 116, price = 2500},
[8] = {text = "furnace", id = 61, price = 100},
[9] = {text = "chest", id = 54, price = 150},
[10] = {text = "crafting table", id = 169, price = 100},
[11] = {text = "pumpkin", id = 86, price = 100},
[12] = {text = "melon", id = 103, price = 100},
[13] = {text = "wood", id = 5, price = 50},
[14] = {text = "obsidian", id = 49, price = 250},
[15] = {text = "glowstone", id = "dust?", price = 250},
[16] = {text = "block of c. stone", id = "214:1", price = 1000},
[17] = {text = "block of steel", id = "214:2", price = 500},
[18] = {text = "uranium block", id = "224:3", price = 1000},
[19] = {text = "ruby block", id = "145", price = 1500},
[20] = {text = "emerald block", id = "145:2", price = 1500},
[21] = {text = "sapphire block", id = "145:3", price = 1500},
[22] = {text = "copper block", id = "224", price = 500},
[23] = {text = "tin block", id = "224:1", price = 600},
[24] = {text = "bronze block", id = "224:2", price = 750},
[25] = {text = "lapis lazuli block", id = "22", price = 1000},
[26] = {text = "block of iron", id = "42", price = 1000},
[27] = {text = "block of gold", id = "41", price = 2500},
[28] = {text = "block of diamond", id = "57", price = 5000},
[29] = {text = "DM block", id = "126:8", price = 7500},
[30] = {text = "RM block", id = "126:9", price = 10000},
[31] = {text = "32", id = "32", price = 1500},
[32] = {text = "33", id = "33", price = 1500},
[33] = {text = "34", id = "34", price = 1500},
[34] = {text = "35", id = "35", price = 1500},
[35] = {text = "36", id = "36", price = 1500},
[36] = {text = "37", id = "37", price = 1500},
[37] = {text = "38", id = "38", price = 1500},
[38] = {text = "39", id = "39", price = 1500},
[39] = {text = "40", id = "40", price = 1500},
[40] = {text = "41", id = "41", price = 1500},
[41] = {text = "42", id = "42", price = 1500},
[42] = {text = "43", id = "43", price = 1500},
[43] = {text = "44", id = "44", price = 1500},
[44] = {text = "45", id = "45", price = 1500},
[45] = {text = "46", id = "46", price = 1500},
[46] = {text = "47", id = "47", price = 1500},
[47] = {text = "48", id = "48", price = 1500},
[48] = {text = "49", id = "49", price = 1500},
[49] = {text = "50", id = "50", price = 1500},
[50] = {text = "51", id = "51", price = 1500},
[51] = {text = "52", id = "52", price = 1500},
}

function tclr()
 term.clear()
 term.setCursorPos(1,1)
end

function printmenu(menu)
 term.clear()
 term.setCursorPos(w-w+1, h-1)
 print("gyorskereso: Right Shift")
 if selecteditem<h*2-3 then
  step = 1
 elseif selecteditem>=h*2-4 then
  step = 32
 end
 for i=step, #menu do
  if selecteditem<h*2-3 then
   if i<=h-2 then
    if i == selecteditem then
     term.setCursorPos(w-w+1, (i))
     print("["..menu[i].text.."]")
    else
     term.setCursorPos(w-w+1, (i))
     print(" "..menu[i].text.." ")
    end
   elseif i>=h-1 and i<=h*2-4 then
    if i == selecteditem then
     term.setCursorPos(w/2+5, (i-h+2))
     print("["..menu[i].text.."]")
    else
     term.setCursorPos(w/2+5, (i-h+2))
     print(" "..menu[i].text.." ")
    end
   end
  elseif selecteditem > h*2-4 then
   if i-32<=h-2 then
    if i == selecteditem then
     term.setCursorPos(w-w+1, (i-32))
     print("["..menu[i].text.."]")
    else
     term.setCursorPos(w-w+1, (i-32))
     print(" "..menu[i].text.." ")
    end
   elseif i-32>=h-1 and i-32<=h*2-4 then
    if i == selecteditem then
     term.setCursorPos(w/2+5, (i-32-h+2))
     print("["..menu[i].text.."]")
    else
     term.setCursorPos(w/2+5, (i-32-h+2))
     print(" "..menu[i].text.." ")
    end
   end
  end
 end
 --term.setCursorPos(w, h)
-- print(selecteditem)
end

function onkeypressed(key, menu)
 if key == 28 then
  term.setCursorPos(w-w+1, h-1)
  print("name: "..menu[selecteditem].text.." :: price: "..menu[selecteditem].price.." $") sleep(3)
 elseif key == 54 then
  term.clear()
  term.setCursorPos(1, 1)
  print("ird be a keresett targy azonositojat")
  id = tonumber(read())
   if id == nil then
      term.setCursorPos(w-w+1, h-1)
      print("Az azonosito csak szam lehet!") sleep(3)
   else
    id = id + 0
    for i = 1, #menu do
     if id == menu[i].id then
      selecteditem = i
      printmenu(mainmenu)
      term.setCursorPos(w-w+1, h-1)
      print("name: "..menu[selecteditem].text.." :: price: "..menu[selecteditem].price.." $") sleep(3)
      return
     else
      if i == #menu then
       term.setCursorPos(w-w+1, h-1)
       print("nincs ilyen azonosito") sleep(1)
      end
     end
    end
   end
 elseif key == 203 then
  if selecteditem > h - 2 then
   selecteditem = selecteditem - h + 2
  end
 elseif key == 205 then
  if selecteditem < #menu - h + 3 then
   selecteditem = selecteditem + h - 2
  end
 elseif key == 200 then
  if selecteditem > 1 then
   selecteditem = selecteditem - 1
  end
 elseif key == 208 then
  if selecteditem < #menu then
   selecteditem = selecteditem + 1
  end
 end
end

while true do
 printmenu(mainmenu)
 event, key = os.pullEvent("key")
 onkeypressed(key, mainmenu)
end