mlaga97/PySimpleGUI
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Changed multi-threaded demos to use new Window.write_event_value method

Browse source
This commit is contained in:
PySimpleGUI 2020-07-18 13:42:32 -04:00
parent 934cea5881
commit 04dfa364d5
6 changed files with 109 additions and 139 deletions
Download patch file Download diff file Expand all files Collapse all files

57
DemoPrograms/Demo_Multithreaded_Long_Task_Simple.py
View file

@ -17,26 +17,21 @@ import PySimpleGUI as sg
long as the task is running.
"""
total = 100 # number of units that are used with the progress bar
message = '' # used by thread to send back a message to the main thread
progress = 0 # current progress up to a maximum of "total"
def long_operation_thread(seconds):
def long_operation_thread(seconds, window):
"""
A worker thread that communicates with the GUI through a global message variable
This thread can block for as long as it wants and the GUI will not be affected
:param seconds: (int) How long to sleep, the ultimate blocking call
"""
global message, progress
progress = 0
print('Thread started - will sleep for {} seconds'.format(seconds))
for i in range(int(seconds * 10)):
time.sleep(.1) # sleep for a while
progress += total / (seconds * 10)
progress += 100 / (seconds * 10)
window.write_event_value('-PROGRESS-', progress)
message = f'*** The thread says.... "I am finished" ***'
window.write_event_value('-THREAD-', '*** The thread says.... "I am finished" ***')
def the_gui():
"""
@ -44,47 +39,47 @@ def the_gui():
Reads data from a global variable and displays
Returns when the user exits / closes the window
"""
global message, progress
sg.theme('Light Brown 3')
layout = [[sg.Text('Long task to perform example')],
[sg.Output(size=(80, 12))],
[sg.MLine(size=(80, 12), k='-ML-', reroute_stdout=True,write_only=True, autoscroll=True, auto_refresh=True)],
[sg.Text('Number of seconds your task will take'),
sg.Input(key='-SECONDS-', size=(5, 1)),
sg.Input(key='-SECONDS-', focus=True, size=(5, 1)),
sg.Button('Do Long Task', bind_return_key=True),
sg.CBox('ONE chunk, cannot break apart', key='-ONE CHUNK-')],
[sg.Text('Work progress'), sg.ProgressBar(total, size=(20, 20), orientation='h', key='-PROG-')],
[sg.Text('Work progress'), sg.ProgressBar(100, size=(20, 20), orientation='h', key='-PROG-')],
[sg.Button('Click Me'), sg.Button('Exit')], ]
window = sg.Window('Multithreaded Demonstration Window', layout)
thread = None
window = sg.Window('Multithreaded Demonstration Window', layout, finalize=True)
timeout = thread = None
# --------------------- EVENT LOOP ---------------------
while True:
event, values = window.read(timeout=100)
event, values = window.read(timeout=timeout)
# print(event, values)
if event in (sg.WIN_CLOSED, 'Exit'):
break
elif event.startswith('Do') and not thread:
print('Thread Starting! Long work....sending value of {} seconds'.format(float(values['-SECONDS-'])))
thread = threading.Thread(target=long_operation_thread, args=(float(values['-SECONDS-']),), daemon=True)
timeout = 100 if values['-ONE CHUNK-'] else None
thread = threading.Thread(target=long_operation_thread, args=(float(values['-SECONDS-']),window), daemon=True)
thread.start()
if values['-ONE CHUNK-']:
sg.popup_animated(sg.DEFAULT_BASE64_LOADING_GIF, background_color='white', transparent_color='white', time_between_frames=100)
elif event == 'Click Me':
print('Your GUI is alive and well')
if thread: # If thread is running
if values['-ONE CHUNK-']: # If one big operation, show an animated GIF
sg.popup_animated(sg.DEFAULT_BASE64_LOADING_GIF, background_color='white', transparent_color='white', time_between_frames=100)
else: # Not one big operation, so update a progress bar instead
window['-PROG-'].update_bar(progress, total)
elif event == '-PROGRESS-':
if not values['-ONE CHUNK-']:
window['-PROG-'].update_bar(values[event], 100)
elif event == '-THREAD-': # Thread has completed
thread.join(timeout=0)
if not thread.is_alive(): # the thread finished
print(f'message = {message}')
sg.popup_animated(None) # stop animination in case one is running
thread, message, progress = None, '', 0 # reset variables for next run
window['-PROG-'].update_bar(0,0) # clear the progress bar
print('Thread finished')
sg.popup_animated(None) # stop animination in case one is running
thread, message, progress, timeout = None, '', 0, None # reset variables for next run
window['-PROG-'].update_bar(0,0) # clear the progress bar
if values['-ONE CHUNK-'] and thread is not None:
sg.popup_animated(sg.DEFAULT_BASE64_LOADING_GIF, background_color='white', transparent_color='white', time_between_frames=100)
window.close()