Menu Drawer

function drawMenu(tMenu, xpos, ypos, curSel)
    if xpos == true then
        centered = true
        else
        centered = false
    end
    if curSel ~= nil or curSel~= "" then
        sel = 1
    else
        sel = curSel
    end
    tPlaces = {}
    while true do
    for i=1, #tMenu do
        iSel = i-1
        local w, h = term.getSize()
        table.remove(tPlaces, i)
        if i == sel then
        if centered == false then
            term.setCursorPos(xpos, ypos+iSel)
            term.clearLine()
            table.insert(tPlaces, i, term.getCursorPos()+2)
            write("[ "..tMenu[i].." ]")
        else
            term.setCursorPos(w/2-#tMenu[i]/2-2, ypos+iSel)
            term.clearLine()
            table.insert(tPlaces, i, term.getCursorPos()+2)
            write("[ "..tMenu[i].." ]")
        end
        else
        if centered == false then
            term.setCursorPos(xpos, ypos+iSel)
            term.clearLine()
            table.insert(tPlaces, i, term.getCursorPos())
            write(tMenu[i])
        else
            term.setCursorPos(w/2-#tMenu[i]/2, ypos+iSel)
            term.clearLine()
            table.insert(tPlaces, i, term.getCursorPos())
            write(tMenu[i])
        end
        end
    end
    local event, key, x, y = os.pullEvent()
    if event == "key" then
    if key == 200 and sel > 1 and sel <= #tMenu then sel = sel-1
    elseif key == 208 and sel >= 1 and sel < #tMenu then sel = sel+1
    elseif key == 208 and sel == #tMenu then sel = 1
    elseif key == 200 and sel == 1 then sel = #tMenu
    end
    for v = 1, #tMenu do
        if key == 28 and sel == v then
          return tMenu[v], sel
        end
    end
    elseif event == "mouse_click" then
        for s = 1, #tMenu do
            iSel = s-1
            if s == sel then
            if x >= tPlaces[s] and x < tPlaces[s]+#tMenu[s] and y == ypos+iSel then
                return tMenu[s], s
            end
        end
    end
    end
    end
end