Help with DW20 button API

I need HELP! It says attempt to index! What do I do?


Program button:

local mon = peripheral.wrap("top")
mon.setTextScale(1)
mon.setTextColor(colors.white)
local button={}
mon.setBackgroundColor(colors.black)

function clearTable()
button = {}
mon.clear()
end

function setTable(name, func, xmin, xmax, ymin, ymax)
button[name] = {}
button[name]["func"] = func
button[name]["active"] = false
button[name]["xmin"] = xmin
button[name]["ymin"] = ymin
button[name]["xmax"] = xmax
button[name]["ymax"] = ymax
end

function funcName()
print("You clicked buttonText")
end

function fillTable()
setTable("ButtonText", funcName, 5, 25, 4, 8)
end

function fill(text, color, bData)
mon.setBackgroundColor(color)
local yspot = math.floor((bData["ymin"] + bData["ymax"]) /2)
local xspot = math.floor((bData["xmax"] - bData["xmin"] - string.len(text)) /2) +1
for j = bData["ymin"], bData["ymax"] do
mon.setCursorPos(bData["xmin"], j)
if j == yspot then
for k = 0, bData["xmax"] - bData["xmin"] - string.len(text) +1 do
if k == xspot then
mon.write(text)
else
mon.write(" ")
end
end
else
for i = bData["xmin"], bData["xmax"] do
mon.write(" ")
end
end
end
mon.setBackgroundColor(colors.black)
end

function screen()
local currColor
for name,data in pairs(button) do
local on = data["active"]
if on == true then currColor = colors.lime else currColor = colors.red end
fill(name, currColor, data)
end
end

function toggleButton(name)
button[name]["active"] = not button[name]["active"]
screen()
end

function flash(name)
toggleButton(name)
screen()
sleep(0.15)
toggleButton(name)
screen()
end

function 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
–data["active"] = not data["active"]
–print(name)
end
end
end
return false
end

function heading(text)
w, h = mon.getSize()
mon.setCursorPos((w-string.len(text))/2+1, 1)
mon.write(text)
end

function label(w, h, text)
mon.setCursorPos(w, h)
mon.write(text)
end




Program con:



os.loadAPI("button")
m = peripheral.wrap("left")
m.clear()

function fillTable()
button.setTable("Front", front, 5,10,3,4)
button.screen()
end

function getClick()
event,side,x,y = os.pullEvent("monitor_touch")
button.checkxy(x,y)
end

function front()
button.toggleButton("Front")
rs.setBundledOutput("back", colors.white)
sleep(2)
rs.setBundledOutput("back", 0)
end

fillTable()
button.heading("Control Center")
button.label(0,0,"")
while true do
getClick()
end

Split into new topic.

I'm not really sure why you originally posted this in my Touchpoint API topic, since you're using the DW20 button API.

Sorry, but how can i fix it?

What's the full error text? There should be a line number and it should tell you what the actual value was.

What do you mean? All it says is "button:2: attempt to index ? (a nil value)" This happens when I run both programs!

There's no monitor on top of your computer.

Thanks i fixed that but now it says "con:2: attempt to call nil"!

Fixed it thanks!