able to start the time count by clicking LMB but could not find a way to stop and reset it.

import PySimpleGUI as sg
import time
from pynput import mouse

sg.theme('DefaultNoMoreNagging')

layout = [[sg.Text('0.0', size=(10, 1), justification='center', font=('Helvetica', 48), key='-TIMER-')]]

window = sg.Window('Timer', layout, finalize=True)

start_time = 0
timer_running = False

def on_click(x, y, button, pressed):
    global start_time, timer_running
    if button == mouse.Button.left:
        if pressed:
            if not timer_running:
                start_time = time.time()
                timer_running = True
        else:
            if timer_running:
                elapsed_time = round(time.time() - start_time, 1)
                window['-TIMER-'].update('0.0')
                timer_running = False

listener = mouse.Listener(on_click=on_click)
listener.start()

while True:
    event, values = window.read()
    if event == sg.WINDOW_CLOSED:
        listener.stop()
        break

window.close()

What I want is said in title, for example LMB click (and hold) somewhere on the screen, the timer should start as soon as I click, then reset to 0.0s and stop as LMB release.

By the above code the count can start but cannot be stopped nor reset. Can’t find a shortest or cleanest way to do the ‘reset and stop’ work, don’t know if I do the ‘reset and stop’ wrong or the monitoring part of releasing LMB wrong. Newbie to coding and thank you very much!