WIN_CLOSED bulk update. No more test for event is None, use WIN_CLOSED instead

DemoPrograms/Demo_All_Widgets.py

@@ -5,8 +5,8 @@ Example of (almost) all widgets, that you can use in PySimpleGUI.
 
 import PySimpleGUI as sg
 
-# sg.theme('Dark Red')
+
-# sg.theme('Default1')
+sg.theme('Dark Red')
 # sg.set_options(text_color='black', background_color='#A6B2BE', text_element_background_color='#A6B2BE')
 # ------ Menu Definition ------ #
 menu_def = [['&File', ['&Open', '&Save', 'E&xit', 'Properties']],
@@ -17,7 +17,7 @@ menu_def = [['&File', ['&Open', '&Save', 'E&xit', 'Properties']],
 column1 = [[sg.Text('Column 1', justification='center', size=(10, 1))],
            [sg.Spin(values=('Spin Box 1', '2', '3'),
                     initial_value='Spin Box 1')],
-           [sg.Spin(values=('Spin Box 1', '2', '3'),
+           [sg.Spin(values=['Spin Box 1', '2', '3'],
                     initial_value='Spin Box 2')],
            [sg.Spin(values=('Spin Box 1', '2', '3'), initial_value='Spin Box 3')]]
 
@@ -50,10 +50,9 @@ layout = [
      sg.InputText('Default Folder'), sg.FolderBrowse()],
     [sg.Submit(tooltip='Click to submit this form'), sg.Cancel()]]
 
-window = sg.Window('Everything bagel', layout, no_titlebar=True,
+window = sg.Window('Everything bagel', layout)
-    default_element_size=(40, 1), grab_anywhere=False)
 
-event, values = window.read()
+event, values = window.read(close=True)
 sg.popup('Title',
          'The results of the window.',
          'The button clicked was "{}"'.format(event),

DemoPrograms/Demo_Animated_GIFs.py

@@ -30,7 +30,7 @@ gifs = [ring_blue, red_dots_ring, ring_black_dots, ring_gray_segments, ring_line
 
 # first show how to use popup_animated using built-in GIF image
 for i in range(100000):
-    sg.popup_animated(sg.DEFAULT_BASE64_LOADING_GIF, background_color='white', time_between_frames=100)
+    sg.popup_animated(sg.DEFAULT_BASE64_LOADING_GIF, no_titlebar=False, background_color='white', time_between_frames=100)
 sg.popup_animated(None)      # close all Animated Popups
 
 # Next demo is to show how to create custom windows with animations
@@ -49,7 +49,7 @@ offset = 0
 gif = gifs[0]
 while True:                                     # Event Loop
     event, values = window.read(timeout=10)     # loop every 10 ms to show that the 100 ms value below is used for animation
-    if event in (None, 'Exit', 'Cancel'):
+    if event in (sg.WIN_CLOSED, 'Exit', 'Cancel'):
         break
 
     elif event == '-IMAGE-':                    # if clicked on the image

DemoPrograms/Demo_Bar_Chart.py

@@ -37,7 +37,7 @@ window = sg.Window('Window Title', layout)
 
 while True:
     event, values = window.read()
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
 
     graph.erase()

DemoPrograms/Demo_Borderless_Window.py

@@ -30,5 +30,5 @@ window = sg.Window("Borderless Window",
 
 while True:
     event, values = window.read()
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break

DemoPrograms/Demo_Button_Click.py

@@ -12,7 +12,7 @@ window = sg.Window('Temperature Manager', layout, font='Default -24', return_key
 while True:             # Event Loop
     event, values = window.read(timeout=500)    # returns every 500 ms
     print(event, values) if event != sg.TIMEOUT_KEY else None       # a debug print
-    if event in (None, 'Quit'):
+    if event in (sg.WIN_CLOSED, 'Quit'):
         break
     if event == 'Set':
         print('setting temperature to ', values['-IN-'])

DemoPrograms/Demo_Button_Events_From_Browse.py

@@ -24,7 +24,7 @@ window = sg.Window('Window Title', layout)
 
 while True:             # Event Loop
     event, values = window.read()
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     # When choice has been made, then fill in the listbox with the choices
     if event == '-IN-':

DemoPrograms/Demo_Button_Func_Calls.py

@@ -32,7 +32,7 @@ window = sg.Window('Button Callback Simulation', layout)
 
 while True:             # Event Loop
     event, values = window.read()
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
     elif event == 'Button 1':
         callback_function1()        # call the "Callback" function

DemoPrograms/Demo_Button_States.py

@@ -36,7 +36,7 @@ recording = have_data = False
 while True:
     event, values = window.read()
     print(event)
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
     if event == '-Start-':
         for key, state in {'-Start-': True, '-Stop-': False, '-Reset-': False, '-Submit-': True}.items():

DemoPrograms/Demo_Button_Toggle.py

@@ -31,7 +31,7 @@ graphic_off = True
 while True:             # Event Loop
     event, values = window.read()
     print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     elif event == '-B-':                # if the normal button that changes color and text
         down = not down

DemoPrograms/Demo_Buttons_Base64_Simple.py

@@ -24,7 +24,7 @@ window = sg.Window('Window Title', layout)
 while True:                             # Event Loop
     event, values = window.read()       # type: str, dict
     print(event, values)
-    if event in (None, 'Exit'):         # If the user exits
+    if event in (sg.WIN_CLOSED, 'Exit'):         # If the user exits
         break
     window['-OUT-'].Update(event)       # Output the event to the window
 window.close(); del window              # Exiting so clean up

DemoPrograms/Demo_Buttons_Mac.py

@@ -30,7 +30,7 @@ def show_win():
 
     while True:     # Event Loop
         event, values = window.read()
-        if event is None or event == '-exit-':
+        if event == sg.WIN_CLOSED or event == '-exit-':
             break
         if event == '-minimize-':
             # window.Minimize()     # cannot minimize a window with no titlebar

DemoPrograms/Demo_Calendar.py

@@ -4,11 +4,11 @@ import PySimpleGUI as sg
 """
     Simple test harness to demonstate how to use the CalendarButton and the get date popup
 """
-sg.theme('Dark Red')
+# sg.theme('Dark Red')
 layout = [[sg.Text('Date Chooser Test Harness', key='-TXT-')],
       [sg.Input(key='-IN-', size=(20,1)), sg.CalendarButton('Cal US No Buttons Location (0,0)', close_when_date_chosen=True,  target='-IN-', location=(0,0), no_titlebar=False, )],
       [sg.Input(key='-IN3-', size=(20,1)), sg.CalendarButton('Cal Monday', title='Pick a date any date', no_titlebar=True, close_when_date_chosen=False,  target='-IN3-', begin_at_sunday_plus=1, month_names=('студзень', 'люты', 'сакавік', 'красавік', 'май', 'чэрвень', 'ліпень', 'жнівень', 'верасень', 'кастрычнік', 'лістапад', 'снежань'), day_abbreviations=('Дш', 'Шш', 'Шр', 'Бш', 'Жм', 'Иш', 'Жш'))],
-      [sg.Input(key='-IN2-', size=(20,1)), sg.CalendarButton('Cal German Feb 2020',  target='-IN2-',  default_date_m_d_y=(2,None,2020), locale='de DE', begin_at_sunday_plus=1 )],
+      [sg.Input(key='-IN2-', size=(20,1)), sg.CalendarButton('Cal German Feb 2020',  target='-IN2-',  default_date_m_d_y=(2,None,2020), locale='de_DE', begin_at_sunday_plus=1 )],
       [sg.Input(key='-IN4-', size=(20,1)), sg.CalendarButton('Cal Format %m-%d Jan 2020',  target='-IN4-', format='%m-%d', default_date_m_d_y=(1,None,2020), )],
       [sg.Button('Read'), sg.Button('Date Popup'), sg.Exit()]]
 
@@ -17,7 +17,7 @@ window = sg.Window('window', layout)
 while True:
     event, values = window.read()
     print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     elif event == 'Date Popup':
         sg.popup('You chose:', sg.popup_get_date())

DemoPrograms/Demo_Canvas.py

@@ -12,7 +12,7 @@ cir = window['canvas'].TKCanvas.create_oval(50, 50, 100, 100)
 
 while True:
     event, values = window.read()
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
     if event in ('Blue', 'Red'):
         window['canvas'].TKCanvas.itemconfig(cir, fill=event)

DemoPrograms/Demo_Change_Submits_InputText.py

@@ -40,7 +40,7 @@ window = sg.Window('Demonstration of InputText with change_submits',
 while True:     # Event Loop
     event, values = window.read()
     print(event, values)
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
 
 window.close()

DemoPrograms/Demo_Chat.py

@@ -18,7 +18,7 @@ window = sg.Window('Chat window', layout, font=('Helvetica', ' 13'), default_but
 
 while True:     # The Event Loop
     event, value = window.read()
-    if event in (None, 'EXIT'):            # quit if exit button or X
+    if event in (sg.WIN_CLOSED, 'EXIT'):            # quit if exit button or X
         break
     if event == 'SEND':
         query = value['-QUERY-'].rstrip()

DemoPrograms/Demo_Chat_With_History.py

@@ -48,7 +48,7 @@ def ChatBotWithHistory():
             window['query'].update('')
             window['history'].update('\n'.join(command_history[-3:]))
         
-        elif event in (None, 'EXIT'):            # quit if exit event or X
+        elif event in (sg.WIN_CLOSED, 'EXIT'):            # quit if exit event or X
             break
         
         elif 'Up' in event and len(command_history):

DemoPrograms/Demo_Color.py

@@ -1687,7 +1687,7 @@ def main():
         event, values = sg.Window('Color Demo', layout, auto_size_buttons=False).read()
 
         # -------  OUTPUT results portion  ------- #
-        if event == 'Quit' or event is None:
+        if event == 'Quit' or event == sg.WIN_CLOSED:
             exit(0)
         elif event == 'Many buttons':
                 show_all_colors_on_buttons()

DemoPrograms/Demo_Color_Chooser_Custom.py

@@ -689,8 +689,8 @@ def popup_color_chooser(look_and_feel=None):
     color_chosen = None
     while True:  # Event Loop
         event, values = window.read()
-        if event in (None, 'OK'):
+        if event in (sg.WIN_CLOSED, 'OK'):
-            if event is None:
+            if event == sg.WIN_CLOSED:
                 color_chosen = None
             break
         window['-OUT-'](f'You chose {event[0]} : {event[1]}')
@@ -708,7 +708,7 @@ if __name__ == '__main__':
     window = sg.Window('My application', layout)
     while True:
         event, values = window.read()
-        if event in (None, 'Cancel'):
+        if event in (sg.WIN_CLOSED, 'Cancel'):
             break
         if event.startswith('Color'):
             window.hide()

DemoPrograms/Demo_Color_Names.py

@@ -696,7 +696,7 @@ window = sg.Window('Color Viewer', layout, font='Any 9', element_padding=(0,0),
 # -- Event loop --
 while True:
     event, values = window.read()
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
     # -- Create a secondary window that shows white and black text on chosen color
     layout2 = [[

DemoPrograms/Demo_Color_Names_Smaller_List.py

@@ -114,7 +114,7 @@ window = sg.Window('Color Viewer', layout, grab_anywhere=False, font=('any 9'))
 # -- Event loop --
 while True:
     event, values = window.read()
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
     # -- Create a secondary window that shows white and black text on chosen color
     layout2 = [[sg.DummyButton(event, button_color=('white', event)),

DemoPrograms/Demo_Column_And_Frames.py

@@ -19,10 +19,10 @@ col2 = Column([[Frame('Accounts:', [[Column([[Listbox(['Account '+str(i) for i i
 
 col1 = Column([
     # Categories frame
-    [Frame('Categories:', [[Radio('Websites', 'radio1', default=True, key='-WEBSITES-', size=(10, 1)),
+    [Frame('Categories:', [[ Radio('Websites', 'radio1', default=True, key='-WEBSITES-', size=(10, 1)),
                             Radio('Software', 'radio1', key='-SOFTWARE-',  size=(10, 1))]],)],
     # Information frame
-    [Frame('Information:', [[Column([[Text('Account:')],
+    [Frame('Information:', [[Text(), Column([[Text('Account:')],
                                      [Input(key='-ACCOUNT-IN-', size=(19, 1))],
                                      [Text('User Id:')],
                                      [Input(key='-USERID-IN-', size=(19, 1)),
@@ -47,7 +47,7 @@ window = Window('Passwords', layout)
 while True:
     event, values = window.read()
     print(event, values)
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
 
 window.close()

DemoPrograms/Demo_Column_Elem_Swap_Entire_Window.py

@@ -32,7 +32,7 @@ layout = 1  # The currently visible layout
 while True:
     event, values = window.read()
     print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     if event == 'Cycle Layout':
         window[f'-COL{layout}-'].update(visible=False)

DemoPrograms/Demo_Columns.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 import PySimpleGUI as sg
-
+print(sg.version, sg)
 '''
     Usage of Column Element
 '''
@@ -9,7 +9,7 @@ sg.theme('BlueMono')
 
 # Column layout
 col = [[sg.Text('col Row 1', text_color='white', background_color='blue')],
-       [sg.Text('col Row 2', text_color='white', background_color='blue'), sg.Input('col input 1')],
+       [sg.Text('col Row 2', text_color='white', background_color='blue', pad=(0,(25,0))),sg.T('Another item'), sg.T('another'), sg.Input('col input 1')],
        [sg.Text('col Row 3', text_color='white', background_color='blue'), sg.Input('col input 2')]]
 # Window layout
 layout = [[sg.Listbox(values=('Listbox Item 1', 'Listbox Item 2', 'Listbox Item 3'),
@@ -19,7 +19,7 @@ layout = [[sg.Listbox(values=('Listbox Item 1', 'Listbox Item 2', 'Listbox Item
           [sg.OK()]]
 
 # Display the window and get values
-window = sg.Window('Compact 1-line form with column', layout)
+window = sg.Window('Compact 1-line form with column', layout, margins=(0,0), element_padding=(0,0))
 event, values = window.read()
 
 sg.popup(event, values, line_width=200)

DemoPrograms/Demo_Conways_Game_of_Life.py

@@ -141,7 +141,7 @@ class GameOfLife:
                                                j * (BOX_SIZE) + BOX_SIZE),
                                               line_color='black', fill_color='yellow')
         event, values = self.window.read(timeout=self.delay)
-        if event in (None, '-DONE-'):
+        if event in (sg.WIN_CLOSED, '-DONE-'):
             sg.popup('Click OK to exit the program...')
             self.window.close()
             exit()
@@ -159,7 +159,7 @@ class GameOfLife:
                 ids[i].append(0)
         while True:  # Event Loop
             event, values = self.window.read()
-            if event is None or event == '-DONE-':
+            if event == sg.WIN_CLOSED or event == '-DONE-':
                 break
             self.window['-S1-OUT-'].update(values['-SLIDER-'])
             self.window['-S2-OUT-'].update(values['-SLIDER2-'])
@@ -181,7 +181,7 @@ class GameOfLife:
                                                        line_color='black', fill_color='yellow')
                     ids[box_x][box_y] = id_val
                     self.old_grid[box_x][box_y] = 1
-        if event is None:
+        if event == sg.WIN_CLOSED:
             self.window.close()
         else:
             self.window['-DONE-'].update(text='Exit')

DemoPrograms/Demo_Crossword_Puzzle.py

@@ -35,7 +35,7 @@ for row in range(16):
 while True:             # Event Loop
     event, values = window.read()
     print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     mouse = values['-GRAPH-']
 

DemoPrograms/Demo_Cursor_Changed_To_Hand.py

@@ -35,7 +35,7 @@ window['Exit'].set_cursor(cursor='no')
 while True:             # Event Loop
     event, values = window.read()
     print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     if event == '-LINK-':
         # if the text was clicked, open a browser using the text as the address

DemoPrograms/Demo_DOC_Viewer_PIL.py

@@ -168,7 +168,7 @@ old_zoom = False
 
 while True:
     event, value = window.read()
-    if event is None and (value is None or value['-PageNumber-'] is None):
+    if event == sg.WIN_CLOSED and (value is None or value['-PageNumber-'] is None):
         break
     if event in quit_buttons:
         break

DemoPrograms/Demo_Date_Chooser.py

@@ -13,7 +13,6 @@ import itertools
     Copyright 2020 PySimpleGUI
 """
 
-sg.theme('Dark Red')
 
 def popup_get_date(start_mon=None, start_day=None, start_year=None, begin_at_sunday_plus=0, no_titlebar=True, title='Choose Date', keep_on_top=True, location=(None, None), close_when_chosen=False, icon=None, locale=None, month_names=None, day_abbreviations=None):
     """
@@ -129,7 +128,7 @@ def popup_get_date(start_mon=None, start_day=None, start_year=None, begin_at_sun
 
     while True:             # Event Loop
         event, values = window.read()
-        if event in (None, 'Cancel'):
+        if event in (sg.WIN_CLOSED, 'Cancel'):
             chosen_mon_day_year = None
             break
         if event == 'Ok':

DemoPrograms/Demo_Debugger_Built_Into_PSG.py

@@ -40,7 +40,7 @@ sg.show_debugger_popout_window()
 
 while True:             # Your Event Loop
     event, values = window.read(timeout=100)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     elif event == 'Enable':
         window.enable_debugger()

DemoPrograms/Demo_Debugger_Button.py

@@ -37,7 +37,7 @@ counter = 0
 
 while True:             # Your Event Loop
     event, values = window.read(timeout=100)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     elif event == 'Enable':
         window.enable_debugger()

DemoPrograms/Demo_Debugger_ImWatchingYou.py

@@ -39,7 +39,7 @@ counter = 0
 
 while True:  # Your Event Loop
     event, values = window.read(timeout=100)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     elif event == 'Ok':
         print('You clicked Ok.... this is where print output goes')

DemoPrograms/Demo_Design_Pattern_Multiple_Windows.py

@@ -23,7 +23,7 @@ while True:             # Event Loop
     event, values = window.read(timeout=100)
     if event != sg.TIMEOUT_KEY:
         print(i, event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     elif event == 'Popup':
         sg.popup('This is a BLOCKING popup','all windows remain inactive while popup active')
@@ -44,7 +44,7 @@ while True:             # Event Loop
         # print("win2 ", event)
         if event != sg.TIMEOUT_KEY:
             print("win2 ", event)
-        if event == 'Exit' or event is None:
+        if event == 'Exit' or event == sg.WIN_CLOSED:
             # print("Closing window 2", event)
             win2_active = False
             window2.close()

DemoPrograms/Demo_Design_Pattern_Multiple_Windows3.py

@@ -29,7 +29,7 @@ while True:
 
     if window2_active:
         event2 = window2.read()[0]
-        if event2 in (None, 'Exit', '< Prev'):
+        if event2 in (sg.WIN_CLOSED, 'Exit', '< Prev'):
             window2_active = False
             window2.close()
             window.un_hide()
@@ -48,7 +48,7 @@ while True:
             window3_active = False
             window2_active = True
             window2.un_hide()
-        elif ev3 in (None, 'Exit'):
+        elif ev3 in (sg.WIN_CLOSED, 'Exit'):
             break
 
 window.close()

DemoPrograms/Demo_Design_Pattern_Persistent_Window.py

@@ -12,7 +12,7 @@ window = sg.Window('Window Title', layout)
 while True:
     event, values = window.read()
     print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     if event == 'Show':
         # change the "output" element to be the value of "input" element

DemoPrograms/Demo_Design_Patterns.py

@@ -3,59 +3,69 @@ When creating a new PySimpleGUI program from scratch, start here.
 These are the accepted design patterns that cover the two primary use cases
 
 1. A "One Shot" window
-2. A persistent window that stays open after button clicks (uses an event loop)
+2. A "One Shot" window in 1 line of code
-3. A persistent window that need to perform update of an element before the window.read
+3. A persistent window that stays open after button clicks (uses an event loop)
+4. A persistent window that need to perform update of an element before the window.read
 """
-# ---------------------------------#
+# -----------------------------------#
-# DESIGN PATTERN 1 - Simple Window #
+# DESIGN PATTERN 1 - One-shot Window #
-# ---------------------------------#
+# -----------------------------------#
 import PySimpleGUI as sg
 
-sg.theme('Dark Blue 3')
-
 layout = [[ sg.Text('My Oneshot') ],
+          [ sg.Input(key='-IN-') ],
           [ sg.Button('OK') ]]
 
-window = sg.Window('My Oneshot', layout)
+window = sg.Window('Design Pattern 1', layout)
 event, values = window.read()
 window.close()
 
 
+# ---------------------------------------------#
+# DESIGN PATTERN 2 - One-shot Window in 1 line #
+# ---------------------------------------------#
+import PySimpleGUI as sg
+
+event, values = sg.Window('Design Pattern 2', [[sg.Text('My Oneshot')],[sg.Input(key='-IN-')], [ sg.Button('OK') ]]).read(close=True)
+
+
+
 # -------------------------------------#
-# DESIGN PATTERN 2 - Persistent Window #
+# DESIGN PATTERN 3 - Persistent Window #
 # -------------------------------------#
 import PySimpleGUI as sg
 
-sg.theme('Dark Blue 3')
+layout = [[sg.Text('My layout')],
+          [sg.Input(key='-INPUT-')],
+          [sg.Button('OK'), sg.Button('Cancel')] ]
 
-layout = [[ sg.Text('My layout', text_color='red') ],
+window = sg.Window('Design Pattern 3 - Persistent Window', layout)
-          [ sg.Input(key='-INPUT-')],
-          [ sg.Button('OK'), sg.Button('Cancel') ]]
-
-window = sg.Window('Design Pattern 2 - Persistent Window', layout)
 
 while True:     # Event Loop
     event, values = window.read()
-    if event in (None, 'Cancel'):
+    if event == sg.WIN_CLOSED or event == 'Cancel':
         break
 window.close()
 
 # ------------------------------------------------------------------#
-# DESIGN PATTERN 3 - Persistent Window with "early update" required #
+# DESIGN PATTERN 4 - Persistent Window with "early update" required #
 # ------------------------------------------------------------------#
 import PySimpleGUI as sg
 
-sg.theme('Dark Blue 3')
+layout = [[ sg.Text('My layout') ],
-
+          [sg.Input(key='-INPUT-')],
-layout = [[ sg.Text('My layout', key='-TEXT-KEY-') ],
+          [sg.Text('Some text will be output here', key='-TEXT-KEY-')],
           [ sg.Button('OK'), sg.Button('Cancel') ]]
 
-window = sg.Window('Design Pattern 3', layout, finalize=True)
+window = sg.Window('Design Pattern 4', layout, finalize=True)
 
-window['-TEXT-KEY-'].update('NEW Text')     # Change the text field. Finalize allows us to do this
+# Change the text field. Finalize allows us to do this
+window['-TEXT-KEY-'].update('Modified before event loop')
 
 while True:     # Event Loop
     event, values = window.read()
-    if event in (None, 'Cancel'):
+    if event == sg.WIN_CLOSED or event == 'Cancel':
         break
+    if event == 'OK':
+        window['-TEXT-KEY-'].update(values['-INPUT-'])
 window.close()

DemoPrograms/Demo_Desktop_Floating_Toolbar.py

@@ -46,7 +46,7 @@ def Launcher():
     # ---===--- Loop taking in user input and executing appropriate program --- #
     while True:
         event, values = window.read()
-        if event == 'EXIT' or event is None:
+        if event == 'EXIT' or event == sg.WIN_CLOSED:
             break           # exit button clicked
         if event == 'Program 1':
             print('Run your program 1 here!')

DemoPrograms/Demo_Desktop_Widget_CPU_Dashboard.py

@@ -5,15 +5,21 @@ import psutil
 """
     Desktop floating widget - CPU Cores 
     Uses psutil to display:
-        CPU usage on each individual core
+        CPU usage of each individual core
-    Information is updated once a second and is shown as an area graph that scrolls
+    CPU utilization is updated every 500 ms by default
+    Utiliziation is shown as a scrolling area graph
+    To achieve a "rainmeter-style" of window, these featurees were used:
+      An alpha-channel setting of 0.8 to give a little transparency
+      No titlebar
+      Grab anywhere, making window easy to move around
+    Copyright 2020 PySimpleGUI
 """
 
 GRAPH_WIDTH = 120       # each individual graph size in pixels
 GRAPH_HEIGHT = 40
 TRANSPARENCY = .8       # how transparent the window looks. 0 = invisible, 1 = normal window
 NUM_COLS = 4
-POLL_FREQUENCY = 500    # how often to update graphs in milliseconds
+POLL_FREQUENCY = 1500    # how often to update graphs in milliseconds
 
 colors = ('#23a0a0', '#56d856', '#be45be', '#5681d8', '#d34545', '#BE7C29')
 
@@ -21,19 +27,22 @@ colors = ('#23a0a0', '#56d856', '#be45be', '#5681d8', '#d34545', '#BE7C29')
 class DashGraph(object):
     def __init__(self, graph_elem, text_elem, starting_count, color):
         self.graph_current_item = 0
-        self.graph_elem = graph_elem
+        self.graph_elem = graph_elem        # type: sg.Graph
         self.text_elem = text_elem
         self.prev_value = starting_count
         self.max_sent = 1
         self.color = color
+        self.line_list = []                 # list of currently visible lines. Used to delete oild figures
 
     def graph_percentage_abs(self, value):
-        self.graph_elem.draw_line(
+        self.line_list.append(self.graph_elem.draw_line(            # draw a line and add to list of lines
                 (self.graph_current_item, 0),
                 (self.graph_current_item, value),
-                color=self.color)
+                color=self.color))
         if self.graph_current_item >= GRAPH_WIDTH:
             self.graph_elem.move(-1,0)
+            self.graph_elem.delete_figure(self.line_list[0])        # delete the oldest line
+            self.line_list = self.line_list[1:]                     # remove line id from list of lines
         else:
             self.graph_current_item += 1
 
@@ -41,16 +50,13 @@ class DashGraph(object):
         self.text_elem.update(text)
 
 def main():
-    # A couple of "Uber Elements" that combine several elements and enable bulk edits
+    # A couple of "User defined elements" that combine several elements and enable bulk edits
     def Txt(text, **kwargs):
         return(sg.Text(text, font=('Helvetica 8'), **kwargs))
 
     def GraphColumn(name, key):
-        col = sg.Col([[Txt(name, key=key+'_TXT_'), ],
+        return sg.Column([[Txt(name, size=(10,1), key=key+'_TXT_'), ],
-                    [sg.Graph((GRAPH_WIDTH, GRAPH_HEIGHT), (0, 0), (GRAPH_WIDTH, 100), background_color='black',
+                    [sg.Graph((GRAPH_WIDTH, GRAPH_HEIGHT), (0, 0), (GRAPH_WIDTH, 100), background_color='black', key=key+'_GRAPH_')]], pad=(2, 2))
-                              key=key+'_GRAPH_')]], pad=(2, 2))
-        return col
-
 
     num_cores = len(psutil.cpu_percent(percpu=True))        # get the number of cores in the CPU
 
@@ -59,15 +65,13 @@ def main():
 
     # the clever Red X graphic
     red_x = "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"
-    layout = [[ sg.Button('', image_data=red_x, button_color=('black', 'black'), key='Exit', tooltip='Closes window'),
+    layout = [[ sg.Button(image_data=red_x, button_color=('black', 'black'), key='Exit', tooltip='Closes window'),
                 sg.Text('     CPU Core Usage')] ]
 
     # add on the graphs
     for rows in range(num_cores//NUM_COLS+1):
-        row = []
+        # for cols in range(min(num_cores-rows*NUM_COLS, NUM_COLS)):
-        for cols in range(min(num_cores-rows*NUM_COLS, NUM_COLS)):
+        layout += [[GraphColumn('CPU '+str(rows*NUM_COLS+cols), '_CPU_'+str(rows*NUM_COLS+cols)) for cols in range(min(num_cores-rows*NUM_COLS, NUM_COLS))]]
-            row.append(GraphColumn('CPU '+str(rows*NUM_COLS+cols), '_CPU_'+str(rows*NUM_COLS+cols)))
-        layout.append(row)
 
     # ----------------  Create Window  ----------------
     window = sg.Window('PSG System Dashboard', layout,
@@ -82,28 +86,25 @@ def main():
                        finalize=True)
 
     # setup graphs & initial values
-    graphs = []
+    graphs = [DashGraph(window['_CPU_'+str(i)+'_GRAPH_'],
-    for i in range(num_cores):
-        graphs.append(DashGraph(window['_CPU_'+str(i)+'_GRAPH_'],
                                 window['_CPU_'+str(i) + '_TXT_'],
-                                0, colors[i%6]))
+                                0, colors[i%6]) for i in range(num_cores) ]
 
     # ----------------  main loop  ----------------
     while True :
         # --------- Read and update window once every Polling Frequency --------
         event, values = window.read(timeout=POLL_FREQUENCY)
-        if event in (None, 'Exit'):         # Be nice and give an exit
+        if event in (sg.WIN_CLOSED, 'Exit'):         # Be nice and give an exit
             break
         # read CPU for each core
         stats = psutil.cpu_percent(percpu=True)
 
         # update each graph
-        for i in range(num_cores):
+        for i, util in enumerate(stats):
-            graphs[i].graph_percentage_abs(stats[i])
+            graphs[i].graph_percentage_abs(util)
-            graphs[i].text_display('{} CPU {:2.0f}'.format(i, stats[i]))
+            graphs[i].text_display('{} CPU {:2.0f}'.format(i, util))
 
     window.close()
 
 if __name__ == "__main__":
-
     main()

DemoPrograms/Demo_Desktop_Widget_CPU_Graph.py

@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 import PySimpleGUI as sg
-import time
 import random
 import psutil
 from threading import Thread
@@ -57,8 +56,7 @@ def main():
     last_cpu = i = 0
     prev_x, prev_y = 0, 0
     while True:                                 # the Event Loop
-        time.sleep(.5)
+        event, values = window.read(timeout=500)
-        event, values = window.read(timeout=0)
         if event in ('Quit', None):  # always give ths user a way out
             break
         # do CPU measurement and graph it

DemoPrograms/Demo_Desktop_Widget_CPU_Utilization.py

@@ -50,7 +50,7 @@ def main():
          sg.Spin([x+1 for x in range(10)], 3, key='spin')]
     ]
 
-    window = sg.Window('CPU Utilization', layout
+    window = sg.Window('CPU Utilization', layout,
                        no_titlebar=True, keep_on_top=True, alpha_channel=.8, grab_anywhere=True)
 
     # start cpu measurement thread
@@ -63,7 +63,7 @@ def main():
         # --------- Read and update window --------
         event, values = window.read(timeout=timeout_value, timeout_key='Timeout')
         # --------- Do Button Operations --------
-        if event in (None, 'Exit'):
+        if event in (sg.WIN_CLOSED, 'Exit'):
             break
 
         timeout_value = int(values['spin']) * 1000

DemoPrograms/Demo_Desktop_Widget_CPU_Utilization_Simple.py

@@ -26,7 +26,7 @@ while True:
     # --------- Read and update window --------
     event, values = window.read(timeout=interval)
     # --------- Do Button Operations --------
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
 
     interval = int(values['-spin-'])*1000
@@ -38,4 +38,4 @@ while True:
     window['-text-'].update(f'CPU {cpu_percent:02.0f}%')
 
 # Broke out of main loop. Close the window.
-window.CloseNonBlocking()
+window.close()

DemoPrograms/Demo_Desktop_Widget_Timer.py

@@ -47,7 +47,7 @@ while True:
     else:
         event, values = window.read()
     # --------- Do Button Operations --------
-    if event in (None, 'Exit'):        # ALWAYS give a way out of program
+    if event in (sg.WIN_CLOSED, 'Exit'):        # ALWAYS give a way out of program
         break
     if event == '-RESET-':
         paused_time = start_time = time_as_int()

DemoPrograms/Demo_Desktop_Widget_psutil_Dashboard.py

@@ -115,7 +115,7 @@ def main():
         # --------- Read and update window once a second--------
         event, values = window.read(timeout=1000)
         # Be nice and give an exit, expecially since there is no titlebar
-        if event in (None, 'Exit'):
+        if event in (sg.WIN_CLOSED, 'Exit'):
             break
         # ----- Network Graphs -----
         netio = psutil.net_io_counters()

DemoPrograms/Demo_Disable_Elements.py

@@ -52,7 +52,7 @@ for key in key_list:
 
 while True:
     event, values = window.read()
-    if event in (None, 'exit'):
+    if event in (sg.WIN_CLOSED, 'exit'):
         break
     elif event == 'Disable':
         for key in key_list:

DemoPrograms/Demo_EXE_Maker.py

@@ -46,7 +46,7 @@ def Launcher():
         folder_to_remove = os.path.join(source_path, source_filename[:-3])
         file_to_remove = os.path.join(
             source_path, source_filename[:-3]+'.spec')
-        command_line = 'pyinstaller -wF "{}" {} {} {} {}'.format(
+        command_line = 'pyinstaller -wF --clean "{}" {} {} {} {}'.format(
             source_file, icon_option, workpath_option, dispath_option, specpath_option)
 
         if event == 'Make EXE':

DemoPrograms/Demo_Email_Send.py

@@ -76,7 +76,7 @@ def main():
 
     while True:  # Event Loop
         event, values = window.read()
-        if event in (None, 'Exit'):
+        if event in (sg.WIN_CLOSED, 'Exit'):
             break
         if event == 'Send':
             if sg.__name__ != 'PySimpleGUIWeb':     # auto close popups not yet supported in PySimpleGUIWeb

DemoPrograms/Demo_Event_Binding.py

@@ -30,6 +30,6 @@ window['-IN-'].bind('<FocusIn>', '+INPUT FOCUS+')
 while True:             # Event Loop
     event, values = window.read()
     print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
 window.close()

DemoPrograms/Demo_Font_Previewer.py

@@ -34,7 +34,7 @@ window = sg.Window('My new window', layout)
 
 while True:     # Event Loop
     event, values = window.read()
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     text_elem = window['-text-']
     print(event, values)

DemoPrograms/Demo_Font_Sizer.py

@@ -17,7 +17,7 @@ sz = fontSize
 window = sg.Window("Font size selector", layout, grab_anywhere=False)
 while True:
     event, values = window.read()
-    if event is None or event == 'Quit':
+    if event == sg.WIN_CLOSED or event == 'Quit':
         break
     sz_spin = int(values['spin'])
     sz_slider = int(values['slider'])

DemoPrograms/Demo_Font_String.py

@@ -20,7 +20,7 @@ window = sg.Window('Font string builder', layout)
 text_elem = window['-text-']
 while True:     # Event Loop
     event, values = window.read()
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     font_string = 'Helvitica '
     font_string += str(values['-slider-'])

DemoPrograms/Demo_Game_Frontend_Battleship.py

@@ -19,7 +19,7 @@ def Battleship():
     while True:         # The Event Loop
         event, values = window.read()
         print(event, values)
-        if event in (None, 'Exit'):
+        if event in (sg.WIN_CLOSED, 'Exit'):
             break
         if randint(1,10) < 5:           # simulate a hit or a miss
             window[event].update('H', button_color=('white','red'))

DemoPrograms/Demo_Game_Frontend_Battleship_No_List_Comprehensions.py

@@ -28,7 +28,7 @@ def Battleship():
     while True:         # The Event Loop
         event, values = window.read()
         print(event, values)
-        if event in (None, 'Exit'):
+        if event in (sg.WIN_CLOSED, 'Exit'):
             break
         if randint(1,10) < 5:           # simulate a hit or a miss
             window[event].update('H', button_color=('white','red'))

DemoPrograms/Demo_Game_Frontend_Battleship_Single_List_Comprehension.py

@@ -22,7 +22,7 @@ def Battleship():
     while True:         # The Event Loop
         event, values = window.read()
         print(event, values)
-        if event in (None, 'Exit'):
+        if event in (sg.WIN_CLOSED, 'Exit'):
             break
         if randint(1,10) < 5:           # simulate a hit or a miss
             window[event].update('H', button_color=('white','red'))

DemoPrograms/Demo_Google_TTS.py

@@ -24,7 +24,7 @@ i = 0
 mixer.init()
 while True:
     event, values = window.read()
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     # Get the text and convert to mp3 file
     tts = gTTS(text=values[0], lang='en',slow=False)

DemoPrograms/Demo_Graph_Ball_Game.py

@@ -94,7 +94,7 @@ graph_elem.draw_line((0,300),(300,300))
 while True:  # Event Loop
     event, values = window.read(timeout=10)
     # print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     
     area.space.step(0.01)

DemoPrograms/Demo_Graph_Drag_Rectangle.py

@@ -33,7 +33,7 @@ start_point = end_point = prior_rect = None
 while True:
     event, values = window.read()
 
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break  # exit
 
     if event == "-GRAPH-":  # if there's a "Graph" event, then it's a mouse

DemoPrograms/Demo_Graph_Drawing.py

@@ -8,17 +8,18 @@ layout = [[sg.Graph(canvas_size=(400, 400), graph_bottom_left=(0, 0), graph_top_
 
 window = sg.Window('Graph test', layout, finalize=True)
 
-graph = window['graph']
+graph = window['graph']         # type: sg.Graph
 circle = graph.draw_circle((75, 75), 25, fill_color='black', line_color='white')
 point = graph.draw_point((75, 75), 10, color='green')
 oval = graph.draw_oval((25, 300), (100, 280), fill_color='purple', line_color='purple')
 rectangle = graph.draw_rectangle((25, 300), (100, 280), line_color='purple')
 line = graph.draw_line((0, 0), (100, 100))
 arc = graph.draw_arc((0, 0), (400, 400), 160, 10, style='arc', arc_color='blue')
+poly = graph.draw_polygon(((10,10), (20,0), (40,200), (10,10)), fill_color='green')
 while True:
     event, values = window.read()
     print(event, values)
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
     if event in ('Blue', 'Red'):
         graph.TKCanvas.itemconfig(circle, fill=event)
@@ -28,5 +29,6 @@ while True:
         graph.MoveFigure(oval, 10, 10)
         graph.MoveFigure(rectangle, 10, 10)
         graph.MoveFigure(arc, 10, 10)
+        graph.MoveFigure(poly, 10, 10)
 
 window.close()

DemoPrograms/Demo_Graph_Drawing_And_Dragging_Figures.py

@@ -29,7 +29,7 @@ def main():
            [sg.R('Draw Rectangles', 1, key='-RECT-', enable_events=True)],
            [sg.R('Draw Circle', 1, key='-CIRCLE-', enable_events=True)],
            [sg.R('Draw Line', 1, key='-LINE-', enable_events=True)],
-           [sg.R('Draw point', 1,  key='-POINT-', enable_events=True)],
+           [sg.R('Draw points', 1,  key='-POINT-', enable_events=True)],
            [sg.R('Erase item', 1, key='-ERASE-', enable_events=True)],
            [sg.R('Erase all', 1, key='-CLEAR-', enable_events=True)],
            [sg.R('Send to back', 1, key='-BACK-', enable_events=True)],
@@ -40,14 +40,14 @@ def main():
            ]
 
     layout = [[sg.Graph(
-        canvas_size=(400, 400),
+                canvas_size=(400, 400),
-        graph_bottom_left=(0, 0),
+                graph_bottom_left=(0, 0),
-        graph_top_right=(400, 400),
+                graph_top_right=(800, 800),
-        key="-GRAPH-",
+                key="-GRAPH-",
-        change_submits=True,  # mouse click events
+                enable_events=True,
-        background_color='lightblue',
+                background_color='lightblue',
-        drag_submits=True), sg.Col(col) ],
+                drag_submits=True), sg.Col(col) ],
-        [sg.Text(key='info', size=(60, 1))]]
+            [sg.Text(key='info', size=(60, 1))]]
 
     window = sg.Window("Drawing and Moving Stuff Around", layout, finalize=True)
 
@@ -60,7 +60,8 @@ def main():
     graph.bind('<Button-3>', '+RIGHT+')
     while True:
         event, values = window.read()
-        if event is None:
+        print(event, values)
+        if event == sg.WIN_CLOSED:
             break  # exit
         if event in ('-MOVE-', '-MOVEALL-'):
             graph.Widget.config(cursor='fleur')
@@ -94,7 +95,7 @@ def main():
                 elif values['-LINE-']:
                     prior_rect = graph.draw_line(start_point, end_point, width=4)
                 elif values['-POINT-']:
-                    prior_rect = graph.draw_point(start_point, size=1)
+                    graph.draw_point((x,y), size=8)
                 elif values['-ERASE-']:
                     for figure in drag_figures:
                         graph.delete_figure(figure)

DemoPrograms/Demo_Graph_Element.py

@@ -48,7 +48,7 @@ def main():
 
     while True:
         event, values = window.read(timeout=200)
-        if event == 'Quit' or event is None:
+        if event == 'Quit' or event == sg.WIN_CLOSED:
             break
         if g_response_time is None or prev_response_time == g_response_time:
             continue

DemoPrograms/Demo_Graph_Element_Sine_Wave.py

@@ -43,7 +43,7 @@ window = sg.Window('Graph of Sine Function', layout)
 
 while True:
     event, values = window.read()
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
     graph.erase()
     draw_axis()

DemoPrograms/Demo_Graph_Noise.py

@@ -24,7 +24,7 @@ def main():
 
     window = sg.Window('Enter graph size', layout)
     event, values = window.read()
-    if event is None or event == 'Cancel':
+    if event == sg.WIN_CLOSED or event == 'Cancel':
         return
 
     CANVAS_SIZE = int(values['w']), int(values['h'])
@@ -54,7 +54,7 @@ def main():
     figures = []
     while True:
         event, values = window.read(timeout=0)
-        if event == 'Quit' or event is None:
+        if event == 'Quit' or event == sg.WIN_CLOSED:
             break
 
         graph_offset = random.randint(-10, 10)

DemoPrograms/Demo_Graph_pymunk_2D_Graphics.py

@@ -74,7 +74,7 @@ area.add_balls()
 while True:  # Event Loop
     event, values = window.read(timeout=0)
     # print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     area.space.step(0.02)
 

DemoPrograms/Demo_IP_Address_Entry.py

@@ -24,7 +24,7 @@ window = sg.Window('Window Title', layout, return_keyboard_events=True)
 while True:             # Event Loop
     event, values = window.read()
     print(event)
-    if event is None or event == 'Exit':
+    if event == sg.WIN_CLOSED or event == 'Exit':
         break
     elem = window.find_element_with_focus()
 

DemoPrograms/Demo_Img_Viewer.py

@@ -88,7 +88,7 @@ while True:
     event, values = window.read()
     print(event, values)
     # perform button and keyboard operations
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
     elif event in ('Next', 'MouseWheel:Down', 'Down:40', 'Next:34'):
         i += 1

DemoPrograms/Demo_Input_Auto_Complete.py

@@ -5,12 +5,12 @@ import re
     Demo of using a borderless window to show possible matches for autocomplete feature
 '''
 
+
 def autocomplete_popup_show(text_list):
     layout = [[ sg.Listbox(values=text_list,
                             size=(15, len(text_list)),
                             change_submits=True, bind_return_key=True,
                             key='-FLOATING-LISTBOX-', enable_events=True) ]]
-
     return sg.Window("Borderless Window",
                                    layout,
                                    default_element_size=(12, 1),
@@ -22,7 +22,6 @@ def autocomplete_popup_show(text_list):
                                    default_button_element_size=(12, 1),
                                    location=(1320, 622), finalize=True)
 
-
 def predict_text(input, lista):
     pattern = re.compile('.*' + input + '.*')
     return [w for w in lista if re.match(pattern, w)]
@@ -43,7 +42,7 @@ def main():
     while True:             # Event Loop
         event, values = window.read(timeout=500)
 
-        if event in (None, 'Exit'):
+        if event in (sg.WIN_CLOSED, 'Exit'):
             break
 
         if event != sg.TIMEOUT_KEY:

DemoPrograms/Demo_Input_Validation.py

@@ -14,7 +14,7 @@ window = sg.Window('Window Title', layout)
 
 while True:             # Event Loop
     event, values = window.read()
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     # if last char entered not a digit
     if len(values['-INPUT-']) and values['-INPUT-'][-1] not in ('0123456789'):

DemoPrograms/Demo_Invisible_Elements.py

@@ -17,7 +17,7 @@ window = sg.Window('Window Title', layout)
 while True:             # Event Loop
     event, values = window.read()
     print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     if event == 'Invisible':
         window['-COL-'].update(visible=False)

DemoPrograms/Demo_Keyboard_ENTER_Presses_Button.py

@@ -29,7 +29,7 @@ window = sg.Window('My new window', layout,
                    return_keyboard_events=True)
 while True:             # Event Loop
     event, values = window.read()
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
     if event in ('\r', QT_ENTER_KEY1, QT_ENTER_KEY2):         # Check for ENTER key
         # go find element with Focus

DemoPrograms/Demo_Keyboard_Realtime.py

@@ -18,7 +18,7 @@ while True:
             print('%s - %s' % (event, ord(event)))
         else:
             print(event)
-    elif event is None:
+    elif event == sg.WIN_CLOSED:
         break
 
 window.close()

DemoPrograms/Demo_Keypad.py

@@ -29,7 +29,7 @@ window = sg.Window('Keypad', layout,
 keys_entered = ''
 while True:
     event, values = window.read()  # read the form
-    if event is None:  # if the X button clicked, just exit
+    if event == sg.WIN_CLOSED:  # if the X button clicked, just exit
         break
     if event == 'Clear':  # clear keys if clear button
         keys_entered = ''

DemoPrograms/Demo_LED_Clock_Weather.py

@@ -128,7 +128,7 @@ def led_clock():
     while True:
         # Wake up once a second to update the clock and weather
         event, values = gui.window.read(timeout=1000)
-        if event in (None, 'Exit'):
+        if event in (sg.WIN_CLOSED, 'Exit'):
             break
         # update clock
         gui.update_clock()

DemoPrograms/Demo_LED_Indicators.py

@@ -35,7 +35,7 @@ window = sg.Window('My new window', layout, default_element_size=(12, 1), auto_s
 i = 0
 while True:  # Event Loop
     event, value = window.read(timeout=400)
-    if event == 'Exit' or event is None:
+    if event == 'Exit' or event == sg.WIN_CLOSED:
         break
     if value is None:
         break

DemoPrograms/Demo_Layout_Extend.py

@@ -22,7 +22,7 @@ i = 0
 while True:             # Event Loop
     event, values = window.read()
     print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     if event == '-B1-':
         window.extend_layout(window['-COL1-'], [[sg.T('A New Input Line'), sg.I(key=f'-IN-{i}-')]])

DemoPrograms/Demo_Layout_Generation.py

@@ -297,7 +297,7 @@ def layout8():
 
     while True:  # Event Loop
         event, values = window.read()
-        if event in (None, 'SUBMIT'):
+        if event in (sg.WIN_CLOSED, 'SUBMIT'):
             break
     sg.popup('The answers submitted were', values)
     window.close()

DemoPrograms/Demo_Listbox_Search_Filter.py

@@ -13,7 +13,7 @@ window = sg.Window('Listbox with Search', layout)
 # Event Loop
 while True:
     event, values = window.read()
-    if event in (None, 'Exit'):                # always check for closed window
+    if event in (sg.WIN_CLOSED, 'Exit'):                # always check for closed window
         break
     if values['-INPUT-'] != '':                         # if a keystroke entered in search field
         search = values['-INPUT-']

DemoPrograms/Demo_Matplotlib.py

@@ -23,78 +23,81 @@ Basic steps are:
 
 
 # ------------------------------- PASTE YOUR MATPLOTLIB CODE HERE -------------------------------
-
+#
-# Fixing random state for reproducibility
+# # Goal is to have your plot contained in the variable  "fig"
-np.random.seed(19680801)
+#
-
+# # Fixing random state for reproducibility
-# make up some data in the interval ]0, 1[
+# np.random.seed(19680801)
-y = np.random.normal(loc=0.5, scale=0.4, size=1000)
+#
-y = y[(y > 0) & (y < 1)]
+# # make up some data in the interval ]0, 1[
-y.sort()
+# y = np.random.normal(loc=0.5, scale=0.4, size=1000)
-x = np.arange(len(y))
+# y = y[(y > 0) & (y < 1)]
-
+# y.sort()
-# plot with various axes scales
+# x = np.arange(len(y))
-plt.figure(1)
+#
-
+# # plot with various axes scales
-# linear
+# plt.figure(1)
-plt.subplot(221)
+#
-plt.plot(x, y)
+# # linear
-plt.yscale('linear')
+# plt.subplot(221)
-plt.title('linear')
+# plt.plot(x, y)
-plt.grid(True)
+# plt.yscale('linear')
+# plt.title('linear')
+# plt.grid(True)
+#
+# # log
+# plt.subplot(222)
+# plt.plot(x, y)
+# plt.yscale('log')
+# plt.title('log')
+# plt.grid(True)
+#
+# # symmetric log
+# plt.subplot(223)
+# plt.plot(x, y - y.mean())
+# plt.yscale('symlog', linthreshy=0.01)
+# plt.title('symlog')
+# plt.grid(True)
+#
+# # logit
+# plt.subplot(224)
+# plt.plot(x, y)
+# plt.yscale('logit')
+# plt.title('logit')
+# plt.grid(True)
+# plt.gca().yaxis.set_minor_formatter(NullFormatter())
+# plt.subplots_adjust(top=0.92, bottom=0.08, left=0.10, right=0.95, hspace=0.25,
+#                     wspace=0.35)
+# fig = plt.gcf()
+#
 
 
-# log
+fig = matplotlib.figure.Figure(figsize=(5, 4), dpi=100)
-plt.subplot(222)
+t = np.arange(0, 3, .01)
-plt.plot(x, y)
+fig.add_subplot(111).plot(t, 2 * np.sin(2 * np.pi * t))
-plt.yscale('log')
-plt.title('log')
-plt.grid(True)
-
-
-# symmetric log
-plt.subplot(223)
-plt.plot(x, y - y.mean())
-plt.yscale('symlog', linthreshy=0.01)
-plt.title('symlog')
-plt.grid(True)
-
-# logit
-plt.subplot(224)
-plt.plot(x, y)
-plt.yscale('logit')
-plt.title('logit')
-plt.grid(True)
-plt.gca().yaxis.set_minor_formatter(NullFormatter())
-plt.subplots_adjust(top=0.92, bottom=0.08, left=0.10, right=0.95, hspace=0.25,
-                    wspace=0.35)
-fig = plt.gcf()      # if using Pyplot then get the figure from the plot
-figure_x, figure_y, figure_w, figure_h = fig.bbox.bounds
 
 # ------------------------------- END OF YOUR MATPLOTLIB CODE -------------------------------
 
 # ------------------------------- Beginning of Matplotlib helper code -----------------------
 
-
+def draw_figure(canvas, figure):
-def draw_figure(canvas, figure, loc=(0, 0)):
     figure_canvas_agg = FigureCanvasTkAgg(figure, canvas)
     figure_canvas_agg.draw()
     figure_canvas_agg.get_tk_widget().pack(side='top', fill='both', expand=1)
     return figure_canvas_agg
+
 # ------------------------------- Beginning of GUI CODE -------------------------------
 
-
 # define the window layout
-layout = [[sg.Text('Plot test', font='Any 18')],
+layout = [[sg.Text('Plot test')],
-          [sg.Canvas(size=(figure_w, figure_h), key='canvas')],
+          [sg.Canvas(key='-CANVAS-')],
-          [sg.OK(pad=((figure_w / 2, 0), 3), size=(4, 2))]]
+          [sg.Button('Ok')]]
 
 # create the form and show it without the plot
-window = sg.Window('Demo Application - Embedding Matplotlib In PySimpleGUI',
+window = sg.Window('Demo Application - Embedding Matplotlib In PySimpleGUI', layout, finalize=True, element_justification='center', font='Helvetica 18')
-                   layout, finalize=True)
 
 # add the plot to the window
-fig_canvas_agg = draw_figure(window['canvas'].TKCanvas, fig)
+fig_canvas_agg = draw_figure(window['-CANVAS-'].TKCanvas, fig)
 
 event, values = window.read()
 

DemoPrograms/Demo_Matplotlib_Browser.py

@@ -865,7 +865,7 @@ figure_agg = None
 while True:
     event, values = window.read()
     # print(event, values)                  # helps greatly when debugging
-    if event in (None, 'Exit'):             # if user closed window or clicked Exit button
+    if event in (sg.WIN_CLOSED, 'Exit'):             # if user closed window or clicked Exit button
         break
     if figure_agg:
         # ** IMPORTANT ** Clean up previous drawing before drawing again

DemoPrograms/Demo_Matplotlib_Browser_Paned.py

@@ -890,7 +890,7 @@ figure_agg = None
 
 while True:
     event, values = window.read()
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
 
     if figure_agg:

DemoPrograms/Demo_Matplotlib_Embedded_Toolbar.py

@@ -57,7 +57,7 @@ window = sg.Window('Graph with controls', layout)
 while True:
     event, values = window.read()
     print(event, values)
-    if event in (None, 'Exit'):  # always,  always give a way out!
+    if event in (sg.WIN_CLOSED, 'Exit'):  # always,  always give a way out!
         break
     elif event is 'Plot':
         # ------------------------------- PASTE YOUR MATPLOTLIB CODE HERE

DemoPrograms/Demo_Matplotlib_PyLab.py

@@ -16,7 +16,6 @@ from numpy import cos
 
 x = pylab.linspace(-3, 3, 30)
 y = x**2
-
 pylab.plot(x, sin(x))
 pylab.plot(x, cos(x), 'r-')
 pylab.plot(x, -sin(x), 'g--')

DemoPrograms/Demo_Matplotlib_Two_Windows.py

@@ -20,7 +20,7 @@ window = sg.Window('Have some Matplotlib....', layout)
 
 while True:
     event, values = window.read()
-    if event in (None, 'Cancel'):
+    if event in (sg.WIN_CLOSED, 'Cancel'):
         break
     elif event == 'Plot':
         draw_plot()

DemoPrograms/Demo_Media_Player.py

@@ -33,7 +33,7 @@ def MediaPlayerGUI():
 
     while True:
         event, values = window.read(timeout=100)
-        if event == 'Exit' or event is None:
+        if event == 'Exit' or event == sg.WIN_CLOSED:
             break
         # If a button was pressed, display it on the GUI by updating the text element
         if event != sg.TIMEOUT_KEY:

DemoPrograms/Demo_Media_Player_VLC_Based.py

@@ -41,7 +41,7 @@ else:
 #------------ The Event Loop ------------#
 while True:
     event, values = window.read(timeout=1000)       # run with a timeout so that current location can be updated
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
 
     if event == 'play':

DemoPrograms/Demo_Menus.py

@@ -49,7 +49,7 @@ def test_menus():
     # ------ Loop & Process button menu choices ------ #
     while True:
         event, values = window.read()
-        if event in (None, 'Exit'):
+        if event in (sg.WIN_CLOSED, 'Exit'):
             break
         print(event, values)
         # ------ Process menu choices ------ #

DemoPrograms/Demo_Multiline_Multicolored_Text.py

@@ -1,12 +1,12 @@
 import PySimpleGUI as sg
 # import PySimpleGUIQt as sg
 
+print(sg.version)
+
 """
     Demonstration of how to work with multiple colors when outputting text to a multiline element
 """
 
-sg.theme('Dark Blue 3')
-
 MLINE_KEY = '-MLINE-'+sg.WRITE_ONLY_KEY
 layout = [  [sg.Text('Demonstration of Multiline Element\'s ability to show multiple colors ')],
             [sg.Multiline(size=(60,20), key=MLINE_KEY)],
@@ -15,19 +15,21 @@ layout = [  [sg.Text('Demonstration of Multiline Element\'s ability to show mult
 
 window = sg.Window('Demonstration of Multicolored Multline Text', layout)
 
+# print = lambda *args, **kwargs: window[MLINE_KEY].print(*args, **kwargs, text_color='red')
+
 while True:
     event, values = window.read()       # type: (str, dict)
     print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     if 'Text Blue' in event:
-        window[MLINE_KEY].update('This is blue text', text_color_for_value='blue', append=True)
+        window[MLINE_KEY].update('This is blue text\n', text_color_for_value='blue', append=True)
     if 'Text Green' in event:
-        window[MLINE_KEY].update('This is green text', text_color_for_value='green', append=True)
+        window[MLINE_KEY].update('This is green text\n', text_color_for_value='green', append=True)
     if 'Background Blue' in event:
-        window[MLINE_KEY].update('This is Blue Background', background_color_for_value='blue', append=True)
+        window[MLINE_KEY].update('This is Blue Background\n', background_color_for_value='blue', append=True)
     if 'Background Green' in event:
-        window[MLINE_KEY].update('This is Green Backgroundt', background_color_for_value='green', append=True)
+        window[MLINE_KEY].update('This is Green Background\n', background_color_for_value='green', append=True)
     if 'White on Green' in event:
         window[MLINE_KEY].update('This is white text on a green background',  text_color_for_value='white', background_color_for_value='green', append=True)
     if event == 'Plain':

DemoPrograms/Demo_Multiple_Windows_Experimental.py

@@ -28,19 +28,19 @@ window3 = sg.Window('My new window', layout3, location=(800,750), return_keyboar
 
 while True:     # Event Loop
     event, values = window1.read(timeout=0)
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
     elif event != '__timeout__':
         print(event, values)
 
     event, values = window2.read(timeout=0)
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
     elif event != '__timeout__':
         print(event, values)
 
     event, values = window3.read(timeout=0)
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
     elif event != '__timeout__':
         print(event, values)

DemoPrograms/Demo_Multithreaded_Animated_Shell_Command.py

@@ -2,6 +2,7 @@ import subprocess
 import PySimpleGUI as sg
 import threading
 
+
 """
     Demo - Run a shell command while displaying an animated GIF to inform the user the 
     program is still running.
@@ -32,5 +33,6 @@ while True:
 sg.popup_animated(None)
 
 output = proc.__str__().replace('\\r\\n', '\n')
-sg.popup_scrolled(output)
+sg.popup_scrolled(output, font='Courier 10')
+
 

DemoPrograms/Demo_Multithreaded_Different_Threads.py

@@ -115,7 +115,7 @@ def the_gui(gui_queue):
     while True:
         # wait for up to 100 ms for a GUI event
         event, values = window.read(timeout=100)
-        if event in (None, 'Exit'):
+        if event in (sg.WIN_CLOSED, 'Exit'):
             break
         # --------------- Loop through all messages coming in from threads ---------------
         while True:                 # loop executes until runs out of messages in Queue

DemoPrograms/Demo_Multithreaded_Long_Shell_Operation_Animated.py

@@ -13,6 +13,8 @@ import PySimpleGUI as sg
 # Here we're running a simple "pip list" command and using the built-in animated GIF.
 
 output = sg.shell_with_animation('pip', ('list',), message='Loading...', font='Helvetica 15')
+sg.popup_scrolled(output, font='Courier 10')
+output = sg.shell_with_animation('dir', message='Loading...', font='Helvetica 15')
 # output = sg.shell_with_animation(r"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe", message='Loading...', font='Helvetica 15')
 
 sg.popup_scrolled(output, font='Courier 10')

DemoPrograms/Demo_Multithreaded_Long_Task_Simple.py

@@ -64,7 +64,7 @@ def the_gui():
     # --------------------- EVENT LOOP ---------------------
     while True:
         event, values = window.read(timeout=100)
-        if event in (None, 'Exit'):
+        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-'])))

DemoPrograms/Demo_Multithreaded_Long_Tasks.py

@@ -58,7 +58,7 @@ def the_gui():
     # --------------------- EVENT LOOP ---------------------
     while True:
         event, values = window.read(timeout=100)
-        if event in (None, 'Exit'):
+        if event in (sg.WIN_CLOSED, 'Exit'):
             break
         elif event.startswith('Do'):
             try:

DemoPrograms/Demo_Multithreaded_Multiple_Threads.py

@@ -72,7 +72,7 @@ def the_gui():
     while True:
         # wait for up to 100 ms for a GUI event
         event, values = window.read(timeout=100)
-        if event in (None, 'Exit'):
+        if event in (sg.WIN_CLOSED, 'Exit'):
             break
         if event == 'Go':           # clicking "Go" starts a long running work item by starting thread
             window['-OUTPUT-'].update('Starting long work %s' % work_id)

DemoPrograms/Demo_Notification_Window_Multiprocessing.py

@@ -3,17 +3,19 @@ import textwrap
 from multiprocessing import Process
 
 '''
-    Notification Window Demo Program
+    Multiprocessing based Notification Window Demo Program
-    Shamelessly stolen from PySimpleGUI user ncotrb
+    
+    The PySimpleGUI code for showing the windows themselves ovolved from code supplied by PySimpleGUI user ncotrb
 
     Displays a small informational window with an Icon and a message in the lower right corner of the display
     Option to fade in/out or immediatealy display.
     
-    You can click on the notification window to speed things along.  The idea is that if you click while fading in, you should immediately see the info. If
+    You can click on the notification window to speed things along.  The idea is that if you click while fading in, you should immediately see the info. If you click while info is displaying or while fading out, the window closes immediately.
-    you click while info is displaying or while fading out, the window closes immediately.
     
     Note - In order to import and use these calls, you must make the call from a "main program".
-
+    
+    Copyright 2020 PySimpleGUI
+    
 '''
 
 
@@ -37,10 +39,12 @@ image64_success = b'iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAMAAABEpIrGAAAAA3NCSVQICAjb
 
 def _display_notification(title, message, icon=image64_success, display_duration_in_ms=DEFAULT_DISPLAY_DURATION_IN_MILLISECONDS, fade_in_duration=DEFAULT_FADE_IN_DURATION, alpha=0.9, location=None):
     """
+    The PROCESS that is started when a toaster message is to be displayed.
+    Note that this is not a user callable function.
+    It does the actual work of creating and showing the window on the screen
+
     Displays a "notification window", usually in the bottom right corner of your display.  Has an icon, a title, and a message
-    The window will slowly fade in and out if desired.  Clicking on the window will cause it to move through the end the current "phase". For
+    The window will slowly fade in and out if desired.  Clicking on the window will cause it to move through the end the current "phase". For example, if the window was fading in and it was clicked, then it would immediately stop fading in and instead be fully visible.  It's a way for the user to quickly dismiss the window.
-        example, if the window was fading in and it was clicked, then it would immediately stop fading in and instead be fully visible.  It
-        a way for the user to quickly dismiss the window.
     :param title: (str) Text to be shown at the top of the window in a larger font
     :param message: (str) Text message that makes up the majority of the window
     :param icon: (base64) A base64 encoded PNG/GIF image that will be displayed in the window
@@ -94,9 +98,7 @@ def _display_notification(title, message, icon=image64_success, display_duration
 def display_notification(title, message, icon=image64_success, display_duration_in_ms=DEFAULT_DISPLAY_DURATION_IN_MILLISECONDS, fade_in_duration=DEFAULT_FADE_IN_DURATION, alpha=0.9, location=None):
     """
     Displays a "notification window", usually in the bottom right corner of your display.  Has an icon, a title, and a message
-    The window will slowly fade in and out if desired.  Clicking on the window will cause it to move through the end the current "phase". For
+    The window will slowly fade in and out if desired.  Clicking on the window will cause it to move through the end the current "phase". For example, if the window was fading in and it was clicked, then it would immediately stop fading in and instead be fully visible.  It's a way for the user to quickly dismiss the window.
-        example, if the window was fading in and it was clicked, then it would immediately stop fading in and instead be fully visible.  It
-        a way for the user to quickly dismiss the window.
     :param title: (str) Text to be shown at the top of the window in a larger font
     :param message: (str) Text message that makes up the majority of the window
     :param icon: (base64) A base64 encoded PNG/GIF image that will be displayed in the window

DemoPrograms/Demo_OpenCV_7_Line_Program.py

@@ -4,7 +4,7 @@ window = sg.Window('Demo Application - OpenCV Integration', [[sg.Image(filename=
 cap = cv2.VideoCapture(0)  # Setup the camera as a capture device
 while True:  # The PSG "Event Loop"
     event, values = window.read(timeout=20, timeout_key='timeout')  # get events for the window with 20ms max wait
-    if event is None:  break  # if user closed window, quit
+    if event == sg.WIN_CLOSED:  break  # if user closed window, quit
     window['image'].update(data=cv2.imencode('.png', cap.read()[1])[1].tobytes())  # Update image in window
 
 """

DemoPrograms/Demo_OpenCV_Webcam.py

@@ -29,7 +29,7 @@ def main():
 
     while True:
         event, values = window.read(timeout=20)
-        if event == 'Exit' or event is None:
+        if event == 'Exit' or event == sg.WIN_CLOSED:
             return
 
         elif event == 'Record':

DemoPrograms/Demo_OpenCV_Webcam_ASCII.py

@@ -59,7 +59,7 @@ cap = cv2.VideoCapture(0)
 while True:
     
     event, values = window.read(timeout=0)
-    if event in ('Exit', None):
+    if event in ('Exit', sg.WIN_CLOSED):
         break
     # Read image from capture device (camera)
     ret, frame = cap.read()

DemoPrograms/Demo_PDF_Viewer.py

@@ -123,7 +123,7 @@ while True:
     event, values = window.read(timeout=100)
     zoom = 0
     force_page = False
-    if event is None:
+    if event == sg.WIN_CLOSED:
         break
 
     if event in ("Escape:27",):  # this spares me a 'Quit' button!

DemoPrograms/Demo_PNG_Thumbnail_Viewer.py

@@ -98,7 +98,7 @@ while True:
     event, values = window.read()
     display_index = values['-slider-']
     # --------------------- Button & Keyboard ---------------------
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     elif event in ('MouseWheel:Down', 'Down:40',) and display_index < len(png_files)-1:
         display_index += 4

DemoPrograms/Demo_PNG_Viewer.py

@@ -46,7 +46,7 @@ def main():
 
         event, values = window.read()
         # --------------------- Button & Keyboard ---------------------
-        if event is None:
+        if event == sg.WIN_CLOSED:
             break
         elif event in ('Next', 'MouseWheel:Down', 'Down:40', 'Next:34') and i < len(png_files)-1:
             i += 1

DemoPrograms/Demo_Paned_Window.py

@@ -39,7 +39,7 @@ window = sg.Window('Window Title', layout, border_depth=5,
 while True:             # Event Loop
     event, values = window.read()
     print(event, values)
-    if event in (None, 'Exit'):
+    if event in (sg.WIN_CLOSED, 'Exit'):
         break
     if event == 'Remove':
         window['-COL2-'].update(visible=False)