Pilot

-- Pilot: A simple program to manipulate a turtle with the keyboard
--

if term.isColor() then
  HEADER_COLOR = colors.blue
  HEADER_TEXT_COLOR = colors.white
else
  HEADER_COLOR = colors.white
  HEADER_TEXT_COLOR = colors.black
end

local keytable = {
  ['17'] = 'f', ['200'] = 'f',
  ['30'] = 'l', ['203'] = 'l',
  ['31'] = 'b', ['208'] = 'b',
  ['32'] = 'r', ['205'] = 'r',
  ['42'] = 'd', ['54']  = 'd',
  ['57'] = 'u',
  ['16'] = 'q'
}

function lAndRAligned(left, right)
  local maxx, maxy = term.getSize()
  local padding = maxx - (string.len(left) + string.len(right))
  return left .. string.rep(' ', padding) .. right
end

function printUsage()
  term.clear()
  term.setBackgroundColor(HEADER_COLOR)
  term.setTextColor(HEADER_TEXT_COLOR)
  term.setCursorPos(1, 1)
  term.write(lAndRAligned('Pilot', '0.2-alpha'))
  term.setBackgroundColor(colors.black)
  term.setTextColor(colors.white)
  term.setCursorPos(1, 2)
  print('W or Up Arrow:    Forward')
  print('A or Left Arrow:  Turn left')
  print('S or Down Arrow:  Back')
  print('D or Right Arrow: Turn right')
  print('Space:            Go up')
  print('LShift or RShift: Go down')
  if term.isColor() then
    print('Mouse scroll:     Change selected slot')
    print('Left click:       Break/Attack front')
    print('Right click:      Place selected block')
  end
  print('Q:                Quit')
end

printUsage()
while true do
  local e, v1, v2, v3 = os.pullEvent()

  if e == 'key' then
    local dir = keytable[tostring(v1)]

    if     dir == 'f' then turtle.forward()
    elseif dir == 'l' then turtle.turnLeft()
    elseif dir == 'b' then turtle.back()
    elseif dir == 'r' then turtle.turnRight()
    elseif dir == 'u' then turtle.up()
    elseif dir == 'd' then turtle.down()
    elseif dir == 'q' then
      os.queueEvent('tmp')
      os.pullEvent() --Clear leftover events
      break
    end
  elseif e == 'mouse_scroll' then
    if     turtle.getSelectedSlot() + v1 == 0 then v1 = v1 + 16
    elseif turtle.getSelectedSlot() + v1 == 17 then v1 = v1 - 16
    end
    turtle.select(turtle.getSelectedSlot() + v1)
  elseif e == 'mouse_click' then
    if v1 == 1 then turtle.attack(); turtle.dig()
    elseif v1 == 2 then turtle.place()
    end
  end
end