Drag a Window by mouse

Samir

This is an example provided during a Discord dicussion. I thought it could be better to post it here if anyone is interested.

local ui = require "ui"

local win = ui.Window("Window mouse dragging")
local panel = ui.Panel(win)
panel.bgcolor = 0x2020D0
local isMoving = false
local dx, dy

function panel:onMouseDown(b,x,y)
  if b == "left" then
    isMoving = true
    dx = x
    dy = y
  end
end

function win:onMouseUp()
  isMoving = false
end

panel.onMouseUp = win.onMouseUp

function panel:onHover(x,y)
  if isMoving then
    win.x = win.x - (dx - x)
    win.y = win.y - (dy - y)
  end
end

ui.run(win):wait()