Background

I have a basic Desktop app with the following config:

application.ex

defmodule WebInterface.Application do
  use Application

  alias Desktop
  alias Manager
  alias WebInterface.{Endpoint, PubSub, Telemetry}

  @impl true
  def start(_type, _args) do
    children = [
      Telemetry,
      {Phoenix.PubSub, name: PubSub},
      Endpoint,
      Manager,
      {Desktop.Window,
       [
         app: :web_interface,
         id: WebInterface,
         title: "Market Manager",
         size: {900, 900},
         icon: "static/images/resized_logo_5_32x32.png",
         url: &WebInterface.Endpoint.url/0
       ]}
    ]

    opts = [strategy: :one_for_one, name: WebInterface.Supervisor]
    Supervisor.start_link(children, opts)
  end

  @impl true
  def config_change(changed, _new, removed) do
    WebInterface.Endpoint.config_change(changed, removed)
    :ok
  end
end

This is basically the default configuration. You will notice the desktop app does not have a MenuBar. This is on purpose, as I don’t want one.

Problem

The issue here is that no matter what, the application won’t close:

It always reopens.
After checking the code of Desktop, I believe the issue could be in Desktop.Window:

def init(options) do
    window_title = options[:title] || Atom.to_string(options[:id])
    size = options[:size] || {600, 500}
    min_size = options[:min_size]
    app = options[:app]
    icon = options[:icon]
    taskbar_icon = options[:taskbar_icon]
    # not supported on mobile atm
    menubar = unless OS.mobile?(), do: options[:menubar]

Namely, I am lead to believe there is a difference for Mobile apps and normal apps.

Funnily enough, if add a MenuBar, then the application does eventually close, even though it takes forever for the process behind it to terminate:

{Desktop.Window,
       [
         app: :web_interface,
         id: WebInterface,
         title: "Market Manager",
         size: WindowUtils.calculate_window_size(0.4, 0.7),
         menubar: MenuBar,
         icon: "static/images/resized_logo_5_32x32.png",
         url: &WebInterface.Endpoint.url/0
       ]}

Cliking on the Menubar Quit option also closes the application.

Questions

Am I forced to have a Menubar, if my I have a Desktop app?
How can this be fixed?