Clickable and keypress menu

w, h = term.getSize()
run = true
selitem = 1

function choice1()
 print("choice1") sleep(1)
end

function choice2()
 print("choice2") sleep(1)
end

function exiting()
 print("exiting")
 run = false
end

mainmenu = {
[1] = {text = "choice1", handler = choice1},
[2] = {text = "choice2", handler = choice2},
[3] = {text = "exit", handler = exiting}
}

function printmenu(menu)
 term.clear()
 for i = 1, #menu do
  local hossz = string.len(menu[i].text)
  if i == selitem then
   term.setCursorPos(w/2-(hossz/2), i)
   term.setBackgroundColor(colors.red)
   print(">"..menu[i].text.."<")
  else
   term.setCursorPos(w/2-(hossz/2), i)
   term.setBackgroundColor(colors.brown)
   print(" "..menu[i].text.." ")
  end
  term.setBackgroundColor(colors.black)
 end
end

function onkeypressed(key, menu)
 if key == 28 then
  menu[selitem].handler()
 elseif key == 200 then
  if selitem > 1 then
   selitem = selitem - 1
  end
 elseif key == 208 then
  if selitem < #menu then
   selitem = selitem + 1
  end
 end
end

function click(i, y)
 if i == y then
  return true
 end
  return false
end

while run do
 printmenu(mainmenu)
 local event, par1, par2, par3 = os.pullEventRaw()
 if event == "key" then
 printmenu(mainmenu)
  onkeypressed(par1, mainmenu)
 elseif event == "mouse_click" then
  for i = 1, #mainmenu do
   if click(i, par3) then
    if i ~= selitem then
     selitem = i
    else
     mainmenu[selitem].handler()
    end
   end
  end
 end
end