client.lua

-- Client
local devScreenW, devScreenH = 1280, 800 -- Developer Screen W/H
local ScreenW, ScreenH = guiGetScreenSize()
local newScale = dxGetFontHeight(ScreenW / 15000, "default")
local hourDifference = nil
local minuteDifference = nil
local secondDifference = nil
local theResource =  getThisResource ()
local dimensions = {
  left = 1100 / devScreenW * ScreenW,
  top = 10 / devScreenH * ScreenH,
  right = 1270 / devScreenW * ScreenW,
  bottom = 26 / devScreenH * ScreenH,
  visible = true
}

function triggerDataSending()
  triggerServerEvent("data:sending", getLocalPlayer())
  local file = fileExists ("clockInvisible")
  if file then
    removeEventHandler("onClientRender", getRootElement(), drawTime)
    dimensions["visible"] = false
  end
end
addEventHandler("onClientResourceStart", getResourceRootElement(theResource), triggerDataSending)

function calculateDifference(serverHours,serverMinutes,serverSeconds)
  local localTime = getRealTime()
  hourDifference = serverHours - localTime.hour
  minuteDifference = serverMinutes - localTime.minute
  secondDifference = serverSeconds - localTime.second

end
addEvent("calculate:difference", true)
addEventHandler("calculate:difference", getRootElement(), calculateDifference)

function drawTime()
  if hourDifference == nil then
    return
  else
    local localTime = getRealTime()
    local time = string.format("%02d:%02d:%02d", localTime.hour + hourDifference, localTime.minute + minuteDifference, localTime.second + secondDifference)
    text = "Server Time : " .. time
    dxDrawText(
      text,
      dimensions["left"] + 1,
      dimensions["top"] + 1,
      dimensions["right"] + 1,
      dimensions["bottom"] + 1,
      tocolor(0, 0, 0, 255),
      newScale,
      "default",
      "center",
      "center",
      false,
      true,
      true,
      false,
      false
    )
    dxDrawText(
      text,
      dimensions["left"],
      dimensions["top"],
      dimensions["right"],
      dimensions["bottom"],
      tocolor(255, 255, 255, 255),
      newScale,
      "default",
      "center",
      "center",
      false,
      true,
      true,
      false,
      false
    )
  end
end

addEventHandler("onClientRender", getRootElement(), drawTime)
function hideOrShow()
  if (dimensions["visible"] == true) then
    removeEventHandler("onClientRender", getRootElement(), drawTime)
    dimensions["visible"] = false
    local file = fileCreate("clockInvisible")
    fileClose(file)
  elseif (dimensions["visible"] == false) then
    addEventHandler("onClientRender", getRootElement(), drawTime)
    dimensions["visible"] = true
    fileDelete("clockInvisible")
  end
end
addCommandHandler("clock", hideOrShow)