buttonAPI

function newButton(x,y,w,h,color1,color2,text,onClick)
  return {
  create = function(self)
    term.setCursorPos(self.x,self.y)
    self.window_ = window.create(term.current(),self.x,self.y,self.w,self.h)
    self.window_.setBackgroundColor(self.color1)
    self.window_.clear()

    -- add text
    local newX = math.floor((self.w - #self.text)/2) + 1
    local newY = math.floor(self.h / 2)
    self.window_.setCursorPos(newX, newY)
    self.window_.setTextColor(self.color2)
    self.window_.write(self.text)
    self.window_.redraw()
    self.window_.setTextColor(colors.white)
    term.setCursorPos(1,self.y + self.h + 1 )
  end,
  checkClick = function(self,x,y)
    if (x >= self.x) and (x < (self.w + self.x)) and (y >= self.y) and (y < (self.h + self.y)) then
        return true
    end
    return false
  end,
  x = x,
  y = y,
  w = w,
  h = h,
  color1 = color1,
  color2 = color2,
  text = text,
  onClick = onClick
  }
end