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Merge pull request #5679 from PySimpleGUI/Dev-latest

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Updated to use built-in threading call, tuples for thread keys, relat…
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PySimpleGUI 2022-07-08 11:16:53 -04:00 • committed by GitHub
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47
DemoPrograms/Demo_Multithreaded_ProgressBar.py
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@ -1,5 +1,4 @@
import PySimpleGUI as sg
import threading
import random
import time
@ -15,36 +14,45 @@ import time
Using the write_event_value method enables you to easily do either of these.
Copyright 2021 PySimpleGUI
In this demo, all thread events are a TUPLE with the first item in tuple being THREAD_KEY ---> '-THEAD-'
This allows easy separation of all of the thread-based keys into 1 if statment:
elif event[0] == THREAD_KEY:
Example
(THREAD_KEY, DL_START_KEY) indicates the download is starting and provices the Max value
(THREAD_KEY, DL_END_KEY) indicates the downloading has completed
The main window uses a relative location when making the window so that the one-line-progress-meter has room
Copyright 2021, 2022 PySimpleGUI
"""
THREAD_KEY = '-THREAD-'
DL_START_KEY = '-START DOWNLOAD-'
DL_COUNT_KEY = '-COUNT-'
DL_END_KEY = '-END DOWNLOAD-'
DL_THREAD_EXITNG = '-THREAD EXITING-'
def the_thread(window:sg.Window):
"""
The thread that communicates with the application through the window's events.
Once a second wakes and sends a new event and associated value to the window
Simulates downloading a random number of chinks from 50 to 100-
"""
max_value = random.randint(50, 100)
window.write_event_value(DL_START_KEY, max_value) # Data sent is a tuple of thread name and counter
window.write_event_value((THREAD_KEY, DL_START_KEY), max_value) # Data sent is a tuple of thread name and counter
for i in range(max_value):
time.sleep(.1)
window.write_event_value(DL_COUNT_KEY, i) # Data sent is a tuple of thread name and counter
window.write_event_value(DL_END_KEY, max_value) # Data sent is a tuple of thread name and counter
window.write_event_value((THREAD_KEY, DL_COUNT_KEY), i) # Data sent is a tuple of thread name and counter
window.write_event_value((THREAD_KEY, DL_END_KEY), max_value) # Data sent is a tuple of thread name and counter
def main():
layout = [ [sg.Text('My Window')],
[sg.ProgressBar(100, 'h', size=(30,20), k='-PROGRESS-')],
layout = [ [sg.Text('My Multi-threaded PySimpleGUI Program')],
[sg.ProgressBar(100, 'h', size=(30,20), k='-PROGRESS-', expand_x=True)],
[sg.Text(key='-STATUS-')],
[sg.Button('Go'), sg.Button('Exit')] ]
window = sg.Window('Window Title', layout, finalize=True)
window.read(timeout=0)
window.move(window.current_location()[0], window.current_location()[1]-300)
window = sg.Window('Window Title', layout, finalize=True, relative_location=(0, -300))
downloading, max_value = False, 0
while True: # Event Loop
@ -53,17 +61,24 @@ def main():
if event == sg.WIN_CLOSED or event == 'Exit':
break
if event == 'Go' and not downloading:
threading.Thread(target=the_thread, args=(window,), daemon=True).start()
elif event == DL_START_KEY:
window.start_thread(lambda: the_thread(window), (THREAD_KEY, DL_THREAD_EXITNG))
# Events coming from the Thread
elif event[0] == THREAD_KEY:
if event[1] == DL_START_KEY:
max_value = values[event]
downloading = True
window['-STATUS-'].update('Starting download')
sg.one_line_progress_meter(f'Downloading {max_value} segments', 0, max_value, 1, f'Downloading {max_value} segments', )
window['-PROGRESS-'].update(0, max_value)
elif event == DL_COUNT_KEY:
elif event[1] == DL_COUNT_KEY:
sg.one_line_progress_meter(f'Downloading {max_value} segments', values[event]+1, max_value, 1, f'Downloading {max_value} segments')
window['-STATUS-'].update(f'Got a new current count update {values[event]}')
window['-PROGRESS-'].update(values[event]+1, max_value)
elif event == DL_END_KEY:
elif event[1] == DL_END_KEY:
downloading = False
window['-STATUS-'].update('Download finished')
elif event[1] == DL_THREAD_EXITNG:
window['-STATUS-'].update('Last step - Thread has exited')
window.close()