Button API

Button = {
name = "",
x = 0,
y = 0,
x2 = 0,
y2 = 0,
txtcol = 0,
bakcol = 0,
txtcol2 = 0,
bakcol2 = 0
}

iColor = {}
for i = 0, 15 do
  iColor[i + 1] = 2 ^ i
end

function Button:new(name, x, y, x2, y2, txtcol, bakcol, txtcol2, bakcol2)
  class = {name = name, x = x, y = y, x2 = x2, y2 = y2, txtcol = txtcol, bakcol = bakcol, txtcol2 = txtcol2, bakcol2 = bakcol2}
  setmetatable(class, self)
  self.__index = self
  return class
end

function Button:display()
  term.setTextColor(iColor[self.txtcol])
  paintutils.drawFilledBox(self.x, self.y, self.x2, self.y2, iColor[self.bakcol])
  term.setCursorPos(((self.x2 - self.x) / 2) - (#self.name / 2) + self.x + 1, ((self.y2 - self.y) / 2) + self.y)
  term.write(self.name)
end

function Button:activate()
  term.setTextColor(iColor[self.txtcol2])
  paintutils.drawFilledBox(self.x, self.y, self.x2, self.y2, iColor[self.bakcol2])
  term.setCursorPos(((self.x2 - self.x) / 2) - (#self.name / 2) + self.x + 1, ((self.y2 - self.y) / 2) + self.y)
  term.write(self.name)
end

function getEvents()
  events = {os.pullEvent()}
end

function Button:check()
  if events[1] == "mouse_click" and events[2] == 1 and events[3] >= self.x and events[3] <= self.x2 and events[4] >= self.y and events[4] <= self.y2 then
    self:activate()
    sleep(.2)
    return true
  else
    return false
  end
end

--otional display program--
--[[term.setBackgroundColor(colors.black)
term.clear()
Start = Button:new("Start", 10, 5, 17, 7, 8, 10, 2, 1)
Quit = Button:new("Quit", 19, 10, 24, 11, 15, 2, 12, 5)
Banana = Button:new("Banana", 30, 2, 39, 5, 13, 5, 2, 11)
while true do
  Start:display()
  Quit:display()
  Banana:display()
  events = {os.pullEventRaw()}
  if Start:check() then
    term.setCursorPos(1, 1)
    term.write("Started")
  end
  if Quit:check() then
    break
  end
  if Banana:check() then
    term.setCursorPos(1, 1)
    term.write("yum")
    term.setBackgroundColor(colors.black)
    term.write("    ")
  end
end]]--