willowyknight76

this isn't working

hey I'm trying to make a menu based os that you navigate with the arrow keys and enter button

it should look like this

                        command

                        programs

                       [shutdown]

                        reinstall

it's bringing up this error

too long without yielding:

stack traceback:

                   machine:809: in function 'xpcall'

                   /lib/process.lua:63: in function </lib/process.lua:59>

here's the code I can't for the the life of me figure out what's wrong

local kb = require("keyboard")
local event = require("event")
local component = require("component")
local gpu = component.gpu
local term = require("term")
local w,h = gpu.getResolution()

function printCentered (y,s)
    local x = math.floor((w - string.len(s)) / 2)
    term.setCursor(x,y)
    term.clearLine()
    term.write(s)
end

--menu up
local function up()
  keyboard.keys.up = up()
end
--menu down
local function down()
  keyboard.keys.down = down()
end
--menu enter
local function enter() 
  keyboard.key.enter = enter()
end
--draw menu

local nOption = 1

local function drawMenu()
    term.clear()
    term.setCursor(1,1)
    term.write("perdOS")
    
    term.setCursor(w-11,1)
    if nOption == 1 then
        term.write("Command")
    elseif nOption == 2 then
        term.write("programs")
    elseif nOption == 3 then
        term.write("shutdown")
    elseif nOption == 4 then
        term.write("uninstall")
    else
        end
end

--gui
term.clear()
local function drawFE()
    printCentered(math.floor(h/2) - 3, "")
    printCentered(math.floor(h/2) - 2, "start menu")
    printCentered(math.floor(h/2) - 1, "")
    printCentered(math.floor(h/2) + 0, ((nOption == 1) and "[command  ]") or "command")
    printCentered(math.floor(h/2) + 1, ((nOption == 2) and "[programs ]") or "programs")
    printCentered(math.floor(h/2) + 2, ((nOption == 3) and "[shutdown ]") or "shutdown")
    printCentered(math.floor(h/2) + 3, ((nOption == 4) and "[uninstall]") or "uninstall")
end

--display

drawMenu()
drawFE()

while true do
    local e,p = kb.isKeyDown("")
        if e == "key" then
            local key = p
            if key == down() then
                if nOption > 1 then
                    nOption = nOption - 1
                    drawMenu()
                    drawFE()
                end
            elseif key == up() then
                if nOption < 4 then
                    nOption = nOption + 1
                    drawMenu()
                    drawFE()
                end
            
        elseif key == enter() then
            break
        end
    end
end

--conditions
if nOption == 1 then
shell.run("os/.command")
elseif nOption == 2 then
    shell.run("os/.programs")
elseif nOption == 3 then
    os.shutdown()
else
    shell.run("os/.uninstall")
end