New Demo - Multithreaded logging

Demo_Multithreaded_Logging.py

@@ -0,0 +1,98 @@
+import sys
+if sys.version_info[0] >= 3:
+    import PySimpleGUI as sg
+else:
+    import PySimpleGUI27 as sg
+
+import queue
+import logging
+import threading
+import time
+
+"""
+    This code originated in this project:
+    https://github.com/john144/MultiThreading
+    Thanks to John for writing this in the early days of PySimpleGUI
+    Demo program showing one way that a threaded application can function with PySimpleGUI
+    Events are sent from the ThreadedApp thread to the main thread, the GUI, by using a queue
+"""
+
+logger = logging.getLogger('mymain')
+
+
+def externalFunction():
+    logger.info('Hello from external app')
+    logger.info('External app sleeping 5 seconds')
+    time.sleep(5)
+    logger.info('External app waking up and exiting')
+
+
+class ThreadedApp(threading.Thread):
+    def __init__(self):
+        super().__init__()
+        self._stop_event = threading.Event()
+
+    def run(self):
+        externalFunction()
+
+    def stop(self):
+        self._stop_event.set()
+
+
+class QueueHandler(logging.Handler):
+    def __init__(self, log_queue):
+        super().__init__()
+        self.log_queue = log_queue
+
+    def emit(self, record):
+        self.log_queue.put(record)
+
+
+def main():
+    window = sg.FlexForm('Log window', default_element_size=(30, 2), font=('Helvetica', ' 10'), default_button_element_size=(8, 2), return_keyboard_events=True)
+
+    layout =  \
+        [
+            [sg.Multiline(size=(50, 15), key='Log')],
+            [sg.Button('Start', bind_return_key=True, key='_START_'), sg.Button('Exit')]
+        ]
+
+    window.LayoutAndRead(layout, non_blocking=True)
+    appStarted = False
+
+    # Setup logging and start app
+    logging.basicConfig(level=logging.DEBUG)
+    log_queue = queue.Queue()
+    queue_handler = QueueHandler(log_queue)
+    logger.addHandler(queue_handler)
+    threadedApp = ThreadedApp()
+
+    # Loop taking in user input and querying queue
+    while True:
+        # Wake every 100ms and look for work
+        event, values = window.Read(timeout=100)
+
+        if event == '_START_':
+            if appStarted is False:
+                threadedApp.start()
+                logger.debug('App started')
+                window.FindElement('_START_').Update(disabled=True)
+                appStarted = True
+        elif event in  (None, 'Exit'):
+            break
+
+        # Poll queue
+        try:
+            record = log_queue.get(block=False)
+        except queue.Empty:
+            pass
+        else:
+            msg = queue_handler.format(record)
+            window.FindElement('Log').Update(msg+'\n', append=True)
+
+    window.Close()
+    exit()
+
+
+if __name__ == '__main__':
+    main()

PySimpleGUI.py

@@ -3083,7 +3083,7 @@ class Window:
         self.RootNeedsDestroying = True
         return None
 
-    def CloseNonBlocking(self):
+    def Close(self):
         if self.TKrootDestroyed:
             return
         try:
@@ -3092,13 +3092,12 @@ class Window:
         except:
             pass
 
-    CloseNonBlockingForm = CloseNonBlocking
+    CloseNonBlockingForm = Close
-    Close = CloseNonBlockingForm
+    CloseNonBlocking = Close
-
 
     # IT FINALLY WORKED! 29-Oct-2018 was the first time this damned thing got called
     def OnClosingCallback(self):
-        print('Got closing callback')
+        # print('Got closing callback')
         self.TKroot.quit()  # kick the users out of the mainloop
         if self.CurrentlyRunningMainloop:       # quit if this is the current mainloop, otherwise don't quit!
             self.TKroot.destroy()  # kick the users out of the mainloop
@@ -5810,7 +5809,7 @@ PopupNoWait = PopupNonBlocking
 
 # --------------------------- PopupQuick - a NonBlocking, Self-closing Popup  ---------------------------
 def PopupQuick(*args, button_type=POPUP_BUTTONS_OK, button_color=None, background_color=None, text_color=None,
-               auto_close=True, auto_close_duration=1, non_blocking=True, icon=DEFAULT_WINDOW_ICON, line_width=None,
+               auto_close=True, auto_close_duration=2, non_blocking=True, icon=DEFAULT_WINDOW_ICON, line_width=None,
                font=None, no_titlebar=False, grab_anywhere=False, keep_on_top=False, location=(None, None)):
     """
     Show Popup box that doesn't block and closes itself
@@ -5840,7 +5839,7 @@ def PopupQuick(*args, button_type=POPUP_BUTTONS_OK, button_color=None, backgroun
 
 # --------------------------- PopupQuick - a NonBlocking, Self-closing Popup with no titlebar and no buttons ---------------------------
 def PopupQuickMessage(*args, button_type=POPUP_BUTTONS_NO_BUTTONS, button_color=None, background_color=None, text_color=None,
-               auto_close=True, auto_close_duration=1, non_blocking=True, icon=DEFAULT_WINDOW_ICON, line_width=None,
+               auto_close=True, auto_close_duration=2, non_blocking=True, icon=DEFAULT_WINDOW_ICON, line_width=None,
                font=None, no_titlebar=True, grab_anywhere=False, keep_on_top=False, location=(None, None)):
     """
     Show Popup box that doesn't block and closes itself
@@ -5868,8 +5867,6 @@ def PopupQuickMessage(*args, button_type=POPUP_BUTTONS_NO_BUTTONS, button_color=
           font=font, no_titlebar=no_titlebar, grab_anywhere=grab_anywhere, keep_on_top=keep_on_top, location=location)
 
 
-
-
 # --------------------------- PopupNoTitlebar ---------------------------
 def PopupNoTitlebar(*args, button_type=POPUP_BUTTONS_OK, button_color=None, background_color=None, text_color=None,
                     auto_close=False, auto_close_duration=None, non_blocking=False, icon=DEFAULT_WINDOW_ICON,