pysimplegui Buttonless Text Update-CodePudding

i'm trying to create a big clock as a gui test project. The window should run without any input and just display the time while updating 10 times a second. Regardless of what i tried so far i cannot get the text to update with my current time.

Here's my code:

import PySimpleGUI as gui
import time

gui.theme('Reddit')

clockFont = ('Arial', 72)

layout = [  
            [gui.Text('Loading...',size=(8,2), justification='center', key='CLK', font=clockFont)]
]

window = gui.Window('Big Clock', layout, size=(500, 150), finalize=True)

window.Resizable = True
while True:
    event, values = window.read()
    print(event)
    if event in (None, gui.WIN_CLOSED):
        break
    if event == 'Run':
        currentTime = time.strftime("%H:%M:%S")
        window['CLK'].update(currentTime)
        window.refresh()
        time.sleep(0.1)
window.close()

Additionally someone on StackOverflow said in a post that one should not use time.sleep() in a looped environment. What should i use instead?

CodePudding user response：

Where the event 'Run' come from ?

Try to use option timeout in method window.read to generate event sg.TIMEOUT_EVENT.

timeout

Milliseconds to wait until the Read will return IF no other GUI events happen first

You can also use multithread for time.sleep and call window.write_event_value to generate event to update the GUI.

import PySimpleGUI as gui
import time

gui.theme('Reddit')

clockFont = ('Arial', 72)

layout = [
    [gui.Text('Loading...',size=8, justification='center', key='CLK', font=clockFont)]
]

window = gui.Window('Big Clock', layout, finalize=True)

while True:

    event, values = window.read(timeout=100)

    if event in (None, gui.WIN_CLOSED):
        break

    if event == gui.TIMEOUT_EVENT:
        currentTime = time.strftime("%H:%M:%S")
        window['CLK'].update(currentTime)

window.close()