Example UGAPI, GRID

os.loadAPI("grid")
os.loadAPI("ugapi")
local w, h = term.getSize()
local surface = grid.create(w,h-1)
local menu = ugapi.newMenu(1,h-2,5,2,colors.gray)
local menubtn = ugapi.newButton("Menu",2,h,4,1,colors.white,colors.black,colors.gray)
menu:setPreset("basic",colors.white,colors.gray,colors.gray,colors.black)
ugapi.clrlnycolor(colors.gray,h)
local args = { ... }
if(#args &lt; 1)then error("Ussage: XPaint <file>") end
local file = args[1]
if(fs.exists(file))then
f=fs.open(file,"r")
ns = textutils.unserialize(f.readAll())
f.close()
surface:replace(ns)
else
surface:fill("\127")
end
local inMenu = false
local running = true
menu:addOption('Save ',"basic",function() f=fs.open(file,"w") f.write(surface:getSerial()) f.close() ugapi.clrlny(h) write("File saved as: " .. file) os.pullEvent("mouse_click") ugapi.clrln() menubtn:draw() end)
menu:addOption('Exit ',"basic",function() ugapu.pos(1,1) ugapi.bcolor(colors.black) ugapi.clr() running = false end)
menubtn:onPress(function() if(inMenu)then inMenu = false menubtn:draw() surface:draw() else inMenu = true menu:draw() end end)
menubtn:draw()
surface:draw()
while running do
ev = {os.pullEvent()}
menubtn:update(ev)
if(inMenu ~= true)then
  if(ev[1] == "mouse_click" or ev[1] == "mouse_drag")then
   if(ev[2] == 1 and ev[4] ~= h)then surface:set(ev[3],ev[4],"X") end
   if(ev[2] == 2 and ev[4] ~= h)then surface:set(ev[3],ev[4],"\127") end
   if(ev[4] ~= h)then surface:drawRegion(ev[3],ev[4],ev[3],ev[4]) end
  end
else
  menu:update(ev)
end
end