New Demo - Multithreaded logging
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MikeTheWatchGuy
parent
8eeec3e2e8
commit
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import sys
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if sys.version_info[0] >= 3:
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import PySimpleGUI as sg
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else:
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import PySimpleGUI27 as sg
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import queue
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import logging
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import threading
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import time
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"""
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This code originated in this project:
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https://github.com/john144/MultiThreading
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Thanks to John for writing this in the early days of PySimpleGUI
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Demo program showing one way that a threaded application can function with PySimpleGUI
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Events are sent from the ThreadedApp thread to the main thread, the GUI, by using a queue
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"""
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logger = logging.getLogger('mymain')
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def externalFunction():
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logger.info('Hello from external app')
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logger.info('External app sleeping 5 seconds')
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time.sleep(5)
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logger.info('External app waking up and exiting')
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class ThreadedApp(threading.Thread):
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def __init__(self):
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super().__init__()
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self._stop_event = threading.Event()
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def run(self):
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externalFunction()
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def stop(self):
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self._stop_event.set()
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class QueueHandler(logging.Handler):
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def __init__(self, log_queue):
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super().__init__()
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self.log_queue = log_queue
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def emit(self, record):
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self.log_queue.put(record)
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def main():
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window = sg.FlexForm('Log window', default_element_size=(30, 2), font=('Helvetica', ' 10'), default_button_element_size=(8, 2), return_keyboard_events=True)
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layout = \
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[
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[sg.Multiline(size=(50, 15), key='Log')],
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[sg.Button('Start', bind_return_key=True, key='_START_'), sg.Button('Exit')]
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]
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window.LayoutAndRead(layout, non_blocking=True)
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appStarted = False
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# Setup logging and start app
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logging.basicConfig(level=logging.DEBUG)
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log_queue = queue.Queue()
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queue_handler = QueueHandler(log_queue)
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logger.addHandler(queue_handler)
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threadedApp = ThreadedApp()
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# Loop taking in user input and querying queue
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while True:
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# Wake every 100ms and look for work
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event, values = window.Read(timeout=100)
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if event == '_START_':
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if appStarted is False:
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threadedApp.start()
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logger.debug('App started')
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window.FindElement('_START_').Update(disabled=True)
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appStarted = True
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elif event in (None, 'Exit'):
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break
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# Poll queue
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try:
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record = log_queue.get(block=False)
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except queue.Empty:
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pass
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else:
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msg = queue_handler.format(record)
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window.FindElement('Log').Update(msg+'\n', append=True)
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window.Close()
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exit()
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if __name__ == '__main__':
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main()
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@ -3083,7 +3083,7 @@ class Window:
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self.RootNeedsDestroying = True
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return None
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def CloseNonBlocking(self):
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def Close(self):
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if self.TKrootDestroyed:
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return
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try:
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@ -3092,13 +3092,12 @@ class Window:
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except:
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pass
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CloseNonBlockingForm = CloseNonBlocking
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Close = CloseNonBlockingForm
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CloseNonBlockingForm = Close
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CloseNonBlocking = Close
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# IT FINALLY WORKED! 29-Oct-2018 was the first time this damned thing got called
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def OnClosingCallback(self):
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print('Got closing callback')
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# print('Got closing callback')
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self.TKroot.quit() # kick the users out of the mainloop
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if self.CurrentlyRunningMainloop: # quit if this is the current mainloop, otherwise don't quit!
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self.TKroot.destroy() # kick the users out of the mainloop
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@ -5810,7 +5809,7 @@ PopupNoWait = PopupNonBlocking
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# --------------------------- PopupQuick - a NonBlocking, Self-closing Popup ---------------------------
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def PopupQuick(*args, button_type=POPUP_BUTTONS_OK, button_color=None, background_color=None, text_color=None,
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auto_close=True, auto_close_duration=1, non_blocking=True, icon=DEFAULT_WINDOW_ICON, line_width=None,
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auto_close=True, auto_close_duration=2, non_blocking=True, icon=DEFAULT_WINDOW_ICON, line_width=None,
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font=None, no_titlebar=False, grab_anywhere=False, keep_on_top=False, location=(None, None)):
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"""
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Show Popup box that doesn't block and closes itself
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@ -5840,7 +5839,7 @@ def PopupQuick(*args, button_type=POPUP_BUTTONS_OK, button_color=None, backgroun
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# --------------------------- PopupQuick - a NonBlocking, Self-closing Popup with no titlebar and no buttons ---------------------------
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def PopupQuickMessage(*args, button_type=POPUP_BUTTONS_NO_BUTTONS, button_color=None, background_color=None, text_color=None,
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auto_close=True, auto_close_duration=1, non_blocking=True, icon=DEFAULT_WINDOW_ICON, line_width=None,
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auto_close=True, auto_close_duration=2, non_blocking=True, icon=DEFAULT_WINDOW_ICON, line_width=None,
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font=None, no_titlebar=True, grab_anywhere=False, keep_on_top=False, location=(None, None)):
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"""
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Show Popup box that doesn't block and closes itself
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@ -5868,8 +5867,6 @@ def PopupQuickMessage(*args, button_type=POPUP_BUTTONS_NO_BUTTONS, button_color=
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font=font, no_titlebar=no_titlebar, grab_anywhere=grab_anywhere, keep_on_top=keep_on_top, location=location)
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# --------------------------- PopupNoTitlebar ---------------------------
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def PopupNoTitlebar(*args, button_type=POPUP_BUTTONS_OK, button_color=None, background_color=None, text_color=None,
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auto_close=False, auto_close_duration=None, non_blocking=False, icon=DEFAULT_WINDOW_ICON,
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