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Major update of all demo programs to use new PEP8 bindings, etc

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PySimpleGUI 2019-10-23 16:10:03 -04:00
parent 3f7c87c562
commit 7f52778bcc
307 changed files with 19546 additions and 3297 deletions
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82
DemoPrograms/Demo_Multithreaded_Queued.py
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@ -8,13 +8,7 @@ import queue
import threading
import time
import itertools
# This program has been tested on all flavors of PySimpleGUI and it works with no problems at all
# To try something other than tkinter version, just comment out the first import and uncomment the one you want
import PySimpleGUI as sg
# import PySimpleGUIQt as sg
# import PySimpleGUIWx as sg
# import PySimpleGUIWeb as sg
"""
DESIGN PATTERN - Multithreaded GUI
@ -33,13 +27,13 @@ import PySimpleGUI as sg
"""
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def worker_thread(thread_name, run_freq, gui_queue):
"""
@ -54,15 +48,17 @@ def worker_thread(thread_name, run_freq, gui_queue):
print('Starting thread - {} that runs every {} ms'.format(thread_name, run_freq))
for i in itertools.count(): # loop forever, keeping count in i as it loops
time.sleep(run_freq/1000) # sleep for a while
gui_queue.put('{} - {}'.format(thread_name, i)) # put a message into queue for GUI
# put a message into queue for GUI
gui_queue.put('{} - {}'.format(thread_name, i))
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def the_gui(gui_queue):
"""
@ -73,18 +69,19 @@ def the_gui(gui_queue):
:param gui_queue: Queue the GUI should read from
:return:
"""
layout = [ [sg.Text('Multithreaded Window Example')],
[sg.Text('', size=(15,1), key='_OUTPUT_')],
[sg.Output(size=(40,6))],
[sg.Button('Exit')],]
layout = [[sg.Text('Multithreaded Window Example')],
[sg.Text('', size=(15, 1), key='-OUTPUT-')],
[sg.Output(size=(40, 6))],
[sg.Button('Exit')], ]
window = sg.Window('Multithreaded Window').Layout(layout)
window = sg.Window('Multithreaded Window', layout)
# --------------------- EVENT LOOP ---------------------
while True:
event, values = window.Read(timeout=100) # wait for up to 100 ms for a GUI event
if event is None or event == 'Exit':
# wait for up to 100 ms for a GUI event
event, values = window.read(timeout=100)
if event in (None, 'Exit'):
break
#--------------- Loop through all messages coming in from threads ---------------
# --------------- Loop through all messages coming in from threads ---------------
while True: # loop executes until runs out of messages in Queue
try: # see if something has been posted to Queue
message = gui_queue.get_nowait()
@ -92,11 +89,12 @@ def the_gui(gui_queue):
break # break from the loop if no more messages are queued up
# if message received from queue, display the message in the Window
if message:
window.Element('_OUTPUT_').Update(message)
window.Refresh() # do a refresh because could be showing multiple messages before next Read
window['-OUTPUT-'].update(message)
# do a refresh because could be showing multiple messages before next Read
window.refresh()
print(message)
# if user exits the window, then close the window and exit the GUI func
window.Close()
window.close()
## ## ### #### ## ##
@ -108,12 +106,16 @@ def the_gui(gui_queue):
## ## ## ## #### ## ##
if __name__ == '__main__':
#-- Create a Queue to communicate with GUI --
gui_queue = queue.Queue() # queue used to communicate between the gui and the threads
#-- Start worker threads, one runs twice as often as the other
threading.Thread(target=worker_thread, args=('Thread 1', 500, gui_queue,), daemon=True).start()
threading.Thread(target=worker_thread, args=('Thread 2', 200, gui_queue,), daemon=True).start()
threading.Thread(target=worker_thread, args=('Thread 3', 1000, gui_queue,), daemon=True).start()
#-- Start the GUI passing in the Queue --
# -- Create a Queue to communicate with GUI --
# queue used to communicate between the gui and the threads
gui_queue = queue.Queue()
# -- Start worker threads, one runs twice as often as the other
threading.Thread(target=worker_thread, args=(
'Thread 1', 500, gui_queue,), daemon=True).start()
threading.Thread(target=worker_thread, args=(
'Thread 2', 200, gui_queue,), daemon=True).start()
threading.Thread(target=worker_thread, args=(
'Thread 3', 1000, gui_queue,), daemon=True).start()
# -- Start the GUI passing in the Queue --
the_gui(gui_queue)
print('Exiting Program')
print('Exiting Program')