View difference between Paste ID: XWeDxk7N and 3i9nBiyp

 local API = {}
 local button = {}
 
 local component = require("component")
 local gpu = component.gpu
 local event = require("event")
 
 function API.clearTable()
   button = {}
 end
 
 function API.setTable(name, func, xmin, ymin, xmax, ymax, text, colors) -- color is an object { on : 0x000000, off 0xAAAAAA}
   button[name] = {}
   button[name]["text"] = text
   button[name]["func"] = func
   button[name]["active"] = false
   button[name]["xmin"] = xmin
   button[name]["ymin"] = ymin
   button[name]["xmax"] = xmax
   button[name]["ymax"] = ymax
   button[name]["colors"] = colors
 end
 
 function API.fill(bData)
 
   local yspot = math.floor((bData["ymin"] + bData["ymax"]) /2)
   local xspot = math.floor((bData["xmin"] + bData["xmax"]) /2) - math.floor((string.len(bData["text"])/2))
   local oldColor = gpu.getBackground()
   local curColor = bData["colors"].on
 
   if bData["active"] then
     curColor = bData["colors"].off
   end
   gpu.setBackground(curColor)
   gpu.fill(bData["xmin"], bData["ymin"], bData["xmax"] - bData["xmin"] + 1, bData["ymax"] - bData["ymin"] + 1, " ")
   gpu.set(xspot, yspot, bData["text"])
   gpu.setBackground(oldColor)
 end
 
 function API.screen()
   for name,data in pairs(button) do
      API.fill(data)
   end
 end
 
 function API.toggleButton(name)
   button[name]["active"] = not button[name]["active"]
   API.screen() -- not sure about this one here
 end
 
 function API.flash(name)
   API.toggleButton(name)
   API.screen() -- or here
 end
 
 function API.checkxy(_, _, x, y, _, _)
   for name, data in pairs(button) do
     if y >= data["ymin"] and y <= data["ymax"] then
       if x >= data["xmin"] and x <= data["xmax"] then
         data["func"]()
         return true
       end
     end
   end
   return false
 end
 
 
 return API