Keyboard

if not fs.exists("button") then
  shell.run("pastebin get LP2ZQ5dG button")
end
term.setBackgroundColor(colors.black)
term.clear()
term.setBackgroundColor(colors.white)
local w, h = term.getSize()
for i = h - 4, h do
  term.setCursorPos(1, i)
  term.clearLine()
end
os.loadAPI("button")
keys = {"Q", "W", "E", "R", "T", "Y", "U", "I", "O", "P", "A", "S", "D", "F", "G", "H", "J", "K", "L", "Z", "X", "C", "V", "B", "N", "M"}

local vKeys = {}
local cKeys = {}
local keyX = 1
local keyY = h - 4
for i, v in pairs(keys) do
  if v == "A" or v == "Z" then
    keyY = keyY + 2
    keyX = 1
  end
  vKeys[v] = button.Button:new(v, keyX, keyY, keyX, keyY, 8, 1, 8, 9)
  keyX = keyX + math.floor(w / 11)
end
Delete = button.Button:new("Delete", w - 5, h - 4, w, h - 4, 8, 1, 8, 9)
Enter = button.Button:new("Enter", w - 4, h - 2, w, h - 2, 8, 1, 8, 9)
Shift = button.Button:new("Shift", w - 4, h, w, h, 8, 1, 8, 9)

local nextCap = false
local xPos = 1
local yPos = 1
while true do
  Delete:display()
  Enter:display()
  Shift:display()
  for i, v in pairs(vKeys) do
    v:display()
  end
  button.getClick()
  for i, v in pairs(vKeys) do
    if v:check() then
      term.setCursorPos(xPos, yPos)
      term.setBackgroundColor(colors.black)
      term.setTextColor(colors.white)
      if nextCap then
        term.write(i)
      else
        term.write(string.lower(i))
      end
      xPos = xPos + 1
    end
  end
  if xPos > w then
    xPos = 1
    yPos = yPos + 1
  end
  if Delete:check() then
    if xPos == 1 then
      xPos = w
      yPos = yPos - 1
    else
      xPos = xPos - 1
    end
    term.setCursorPos(xPos, yPos)
    term.setBackgroundColor(colors.black)
    term.setTextColor(colors.white)
    term.write(" ")
  end
  if Enter:check() then
    yPos = yPos + 1
    xPos = 1
  end
  if Shift:check() then
    nextCap = true
  else
    nextCap = false
  end
end