Refatoração do código

[Miguel Oliveira]

local screenX, screenY = guiGetScreenSize()

local rectangleWidth, rectangleHeight = 300, 200
local labelArea = 40

local labelX, labelY = 30, 30
local offX, offY = 0, 0

local centerX, centerY = (screenX / 2) - (rectangleWidth / 2), (screenY / 2) - (rectangleHeight / 2)

local isHolding = false

local function draw()
  dxDrawRectangle(
    centerX, 
    centerY, 
    rectangleWidth,
    rectangleHeight, 
    tocolor(0, 0, 0, 100), 
    false
  )

  dxDrawRectangle(labelX, labelY, labelArea, labelArea, tocolor(255, 255, 255, 255), false)
end

local function isCursorOnElement(
  mouseX,
  mouseY,
  elementX,
  elementY,
  width,
  height
) 
  return mouseX - elementX > 0 
    and mouseX - elementX <= width 
    and mouseY - elementY > 0 
    and mouseY - elementY <= height
end

local function onClick(
  button,
  state,
  absoluteX, 
  absoluteY
)

  if button == "left" and state == "down" and 
    isCursorOnElement(absoluteX, absoluteY, labelX, labelY, 40, 40) 
  then
    isHolding = true
    offX = absoluteX - labelX
    offY = absoluteY - labelY
  else
    isHolding = false
  end
end

local function onCursorMove(
  relativeX, 
  relativeY, 
  absoluteX, 
  absoluteY
)
  if isHolding then
    labelX = absoluteX - offX
    labelY = absoluteY - offY
  end
end

addEventHandler("onClientRender", root, draw)
addEventHandler("onClientClick", root, onClick)
addEventHandler("onClientCursorMove", root, onCursorMove)

Bom dia,

Sou um novato em lua que está vindo de outras linguagens, eventualmente, sou backend e estou curtindo desenvolver em lua pra complementar o time do servidor. Queria saber se há algo que poderia melhorar no meu código teste que consiste em fazer o efeito drag and drop.