I am currently creating a serial data logger program. I am wondering whether I am correctly using the event loop. I have found various approaches in the documentation and am not sure which one is best.

ui.run(win):wait()

win:show()
repeat
    ui.update()
until not win.visible

win:show()
while win.visible do
     ui.update()

To clarify my thoughts: I have a main window with various controls, including a Combobox to select the serial port. As long as no port has been selected, the other controls should be disabled.

Until now, I have displayed the window with “ui.rin(win):wait()” and then deactivated all other controls in the script. Once a port has been selected, I enabled the other controls via the event "Combobox.onSelect()". That means I have to disable or enable controls in different events.

Then I found somethin with async:

ui.run(win)

async(function()
  while win.visible do

    if not isnil(win.PortCombobox.selected) then
      win.WM_DISABLE:enable()
    else
      win.WM_DISABLE:disable()
    end
    if not isnil(win.COM) then
      if win.COM.isopen then
        win.WM_START:disable()
      else
        win.WM_START:enable()
      end
    end
    
    sleep()
    ui.update()
  end
end)

waitall()

I define the conditions for disabling or enabling various controls in the async function. Now I just have to define it in one place.

Is this a good way to program an app?