[Enhancement] Spin out as a subprocess... about animated-popup HOT 3 OPEN

from multiprocessing import Process, Queue
from queue import Empty
from random import randint
import PySimpleGUI as sg

screen_dim = sg.Window.get_screen_size()    # to make it easier to start windows is random locations

def main():

    layout = [[sg.Button('Start'), sg.Button('Stop'), sg.Button('Exit')]]

    window = sg.Window('Multiprocess Tester', layout, keep_on_top=True)

    queues = []
    while True:  # Event Loop
        event, values = window.read()
        if event in (None, 'Exit'):
            break
        if event == 'Start':
            gui_queue = Queue()             # create a queue to communicate with process
            queues.append(gui_queue)        # add the queue to list of active queues
            show_animated_popup(gui_queue)  # start the process
        if event == 'Stop':
            if queues:
                queues[0].put('Stop')
                del queues[0]
    window.close()


def show_animated_popup(gui_queue):
    proc = Process(target=_animated_popup_process, args=(gui_queue,), daemon=True)
    proc.start()
    return proc


def _animated_popup_process(gui_queue):
    while True:
        sg.popup_animated(sg.DEFAULT_BASE64_LOADING_GIF, 'Loading', text_color='black', transparent_color='blue', background_color='blue', time_between_frames=100, location=(screen_dim[0]//2+randint(100,400),screen_dim[1]//2+randint(100,400)))
        try:
            message = gui_queue.get_nowait()    # see if something has been posted to Queue
        except Empty:
            message = None                      # nothing in queue so do nothing
        if message:                             # if something arrived, break from loop and exit process
            break
    sg.popup_animated(None)                     # stop the animated popup before exiting the process


if __name__ == '__main__':
    main()