Added a progress bar

DemoPrograms/Demo_Multithreaded_Long_Task_Simple.py

@@ -1,11 +1,8 @@
 #!/usr/bin/python3
-import queue
 import threading
 import time
 import PySimpleGUI as sg
 
-# This program has been tested on all flavors of PySimpleGUI and it works with no problems at all
-
 """
     DESIGN PATTERN - Multithreaded Long Tasks GUI using shared global variables
     Presents one method for running long-running operations in a PySimpleGUI environment.
@@ -16,10 +13,11 @@ import PySimpleGUI as sg
         a Window is created, and an event loop is executed.
 """
 
-
 thread_done = 1
 message = ''
 thread_counter = 0
+total = 100
+progress = 0
 
 def long_operation_thread(seconds):
     """
@@ -29,11 +27,14 @@ def long_operation_thread(seconds):
     :return:
     """
 
-    global thread_done, message, thread_counter
+    global thread_done, message, thread_counter, progress
 
     print('Starting thread - will sleep for {} seconds'.format(seconds))
     thread_counter += 1
-    time.sleep(seconds)                  # sleep for a while
+    for i in range(int(seconds*10)):
+        time.sleep(.1)                  # sleep for a while
+        progress += total/(seconds*10)
+
     message = f'***This is a message from the thread {thread_counter} ***'
     thread_done = True
 
@@ -44,7 +45,7 @@ def the_gui():
     Reads data from a global variable and displays
     Returns when the user exits / closes the window
     """
-    global thread_done, message
+    global thread_done, message, progress
 
     sg.change_look_and_feel('Light Brown 3')
 
@@ -53,6 +54,7 @@ def the_gui():
               [sg.Text('Number of seconds your task will take'),
                   sg.Input(key='-SECONDS-', size=(5, 1)),
                   sg.Button('Do Long Task', bind_return_key=True)],
+              [sg.Text('Work progress'), sg.ProgressBar(total, size=(20,20), orientation='h', key='-PROG-')],
               [sg.Button('Click Me'), sg.Button('Exit')], ]
 
     window = sg.Window('Multithreaded Window', layout)
@@ -72,8 +74,13 @@ def the_gui():
         if thread_done is True:
             print('The thread has finished!')
             print(f'message = {message}')
+            # reset everything for the next run
             thread_done = False
             message = ''
+            progress = 0
+            window['-PROG-'].update_bar(total, total)       # show the bar as maxed out
+        if progress != 0:
+            window['-PROG-'].update_bar(progress, total)    # update the progress bar if non-zero
 
     # if user exits the window, then close the window and exit the GUI func
     window.close()