[Bug] no_titlebar=True crashes all the examples and my own programs on tkinter.

Type of Issues (Enhancement, Error, Bug, Question)

Bug

Operating System

Archlinux

Python version

Python 3.9.1

PySimpleGUI Port and Version

4.32.1-1

Ports = tkinter, Qt, WxPython, Web
tkinter

PySimpleGUI Version:
4.32.1-1

tkinter version:
<module 'PySimpleGUI' from '/usr/lib/python3.9/site-packages/PySimpleGUI/init.py'>
4.32.1 Released 17-Nov-2020
8.6.10
3.9.1 (default, Dec 13 2020, 11:55:53)
[GCC 10.2.0]

Potential duplicate of:
https://github.com/PySimpleGUI/PySimpleGUI/issues/1577

Your Experience Levels In Months or Years

2 years Python programming experience
30 years Programming experience overall
Yes Have used another Python GUI Framework (tkinter, Qt, etc) previously (yes/no is fine)?

You have completed these steps:

• Read instructions on how to file an Issue
• Searched through main docs http://www.PySimpleGUI.org for your problem
• Searched through the readme for your specific port if not PySimpleGUI (Qt, WX, Remi)
• Looked for Demo Programs that are similar to your goal http://www.PySimpleGUI.com
• Note that there are also Demo Programs under each port on GitHub
• Run your program outside of your debugger (from a command line)
• Searched through Issues (open and closed) to see if already reported
• Try again by upgrading your PySimpleGUI.py file to use the current one on GitHub. Your problem may have already been fixed but is not yet on PyPI.

Description of Problem / Question / Details

no_titlebar=True

Code To Duplicate

Floating toolbar example:

    window = sg.Window('Floating Toolbar', layout, no_titlebar=True, keep_on_top=True)

Traceback (most recent call last):
  File "/data/stevef/scripts/pysimplegui/./toolbar.py", line 68, in <module>
    Launcher()
  File "/data/stevef/scripts/pysimplegui/./toolbar.py", line 36, in Launcher
    (event, value) = window.read()
  File "/usr/lib/python3.9/site-packages/PySimpleGUI/PySimpleGUI.py", line 7721, in Read
    results = self._read(timeout=timeout, timeout_key=timeout_key)
  File "/usr/lib/python3.9/site-packages/PySimpleGUI/PySimpleGUI.py", line 7842, in _read
    Window._root_running_mainloop.mainloop()
  File "/usr/lib/python3.9/tkinter/__init__.py", line 1421, in mainloop
    self.tk.mainloop(n)
KeyboardInterrupt

Remove the no_titlebar=True and everything works perfectly.

A short program that isolates and demonstrates the problem (i.e. please don't paste a link to your 400 line program.... instead paste your 10 line program in full).
See above, floating toolbar example from the cookbook.

Yes, it is a pain to narrow down problems, but it's part of the debugging process. Help me help you by providing something that can be executed so that work on getting you a fix or a workaround can immediately begin.

#!/usr/bin/env python
print("Start")
import PySimpleGUI as sg      
import subprocess      
import os      
import sys      

"""      
Demo_Toolbar - A floating toolbar with quick launcher     One cool PySimpleGUI demo. Shows borderless windows, grab_anywhere, tight button layout      
You can setup a specific program to launch when a button is clicked, or use the Combobox to select a .py file found in the root folder, and run that file.  """      

ROOT_PATH = './'      

def Launcher():      

    def print(line):      
        window['output'].update(line)      

    sg.ChangeLookAndFeel('Dark')      

    namesonly = [f for f in os.listdir(ROOT_PATH) if f.endswith('.py') ]      

    sg.SetOptions(element_padding=(0,0), button_element_size=(12,1), auto_size_buttons=False)      
    layout =  [[sg.Combo(values=namesonly, size=(35,30), key='demofile'),      
                sg.Button('Run', button_color=('white', '#00168B')),      
                sg.Button('Kate'),      
                sg.Button('Program 2'),      
                sg.Button('Program 3', button_color=('white', '#35008B')),      
                sg.Button('EXIT', button_color=('white','firebrick3'))],      
                [sg.T('', text_color='white', size=(50,1), key='output')]]      

    window = sg.Window('Floating Toolbar', layout, no_titlebar=True, keep_on_top=True)

    # ---===--- Loop taking in user input (events) --- #      
    while True:      
        (event, value) = window.read()      
        if event ==  'EXIT'  or event == sg.WIN_CLOSED:      
            break # exit button clicked      
        if event ==  'Kate':      
            os.system('kate')      
        elif event ==  'Program 2':      
            print('Run your program 2 here!')      
        elif event ==  'Run':      
            file = value['demofile']      
            print('Launching %s'%file)      
            ExecuteCommandSubprocess('python', os.path.join(ROOT_PATH, file))      
        else:      
            print(event)      
def ExecuteCommandSubprocess(command, *args, wait=False):      
    try:      
        if sys.platwindow == 'linux':      
            arg_string = ''      
            for arg in args:      
                 arg_string += ' '  + str(arg)      
            sp = subprocess.Popen(['python3'  + arg_string, ], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)      
        else:      
            sp = subprocess.Popen([command, list(args)], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)      

        if wait:      
            out, err = sp.communicate()      
            if out:      
                print(out.decode("utf-8"))      
            if err:      
                print(err.decode("utf-8"))      
    except: pass      

if __name__ == '__main__':      
    Launcher()      

Start with the Floating Toolbar example and inspect PySimpleGUI.py around lines 7721 and 7842, where the traceback enters tkinter's mainloop. Run the provided example with no_titlebar=True on the reported tkinter setup and compare it with the working titled-window case. Done means the borderless example no longer hangs or crashes while retaining its intended behavior.