PySimpleGUI not responding

Question

Im using PySimpleGui to make a simple file format conversion program, but the little window of my program keeps telling me (not responding) like if it was crushing while in reality it's working and its writing the new file.

The issue is the cycle, if i remove it everything works but the user doesnt have any response on the progression of the conversion. I reed some documentation on python threading and i think that everything should work, any tips? here's the code: `

def main():
    
    
    sg.theme('DarkGrey3')
    layout1 = [[sg.Text('File converter (.csv to sdf)')],
              [sg.Frame('Input Filename', 
                        [[sg.Input(key='-IN-'), sg.FileBrowse(), ],])],
              [sg.Frame('Output Path', 
                        [[sg.Input(key='-OUT-'), sg.FolderBrowse(), ],])],
              [sg.Button('Convert'), sg.Button('Exit')], [sg.Text('', key='-c-')]]
    window=sg.Window(title='.csv to .sdf file converter', layout=layout1, margins=(50, 25))
    window.read()
    while True:
        event, values = window.read()
        if event=='Exit' or event==None:
            break
        if event=='Convert':            
            csvfilepath=values['-IN-']
            outpath=values['-OUT-']
            x=threading.Thread(target=Converter, args=[csvfilepath, outpath])
            x.start()
            time.sleep(1)
            while x.is_alive():
                window['-c-'].Update('Conversion')
                time.sleep(1)
                window['-c-'].Update('Conversion.')
                time.sleep(1)
                window['-c-'].Update('Conversion..')
                time.sleep(1)
                window['-c-'].Update('Conversion...')
                time.sleep(1)

`

Answer 1

Following code demo how to update GUI by timeout event and threading.

import time
import threading
import PySimpleGUI as sg

def convert_func(window):
    for i in range(10):    # Simuate the conversion
        window.write_event_value('Conversion Step', i)
        time.sleep(1)
    window.write_event_value('Conversion Done', None)

layout = [
    [sg.Button('Convert'), sg.Text('', expand_x=True, key='Step')],
    [sg.StatusBar('', size=20, key='Status')],
]
window = sg.Window('Title', layout, finalize=True)
status, step = window['Status'], window['Step']
running, index, m = False, 0, 10
msg = ['Conversion'+'.'*i for i in range(m)]

while True:

    event, values = window.read(timeout=200)

    if event == sg.WIN_CLOSED:
        break
    elif event == 'Convert' and not running:
        threading.Thread(target=convert_func, args=(window,), daemon=True).start()
        running = True
    elif event == sg.TIMEOUT_EVENT and running:
        status.update(msg[index])
        index = (index + 1) % m
    elif event == 'Conversion Step':
        print(event)
        i = values[event]
        step.update(f'Step {values[event]}')
    elif event == 'Conversion Done':
        running = False
        step.update('')
        status.update(event)

window.close()