PySimpleGUI/DemoPrograms old/Demo_Design_Pattern_Persist...

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import sys
if sys.version_info[0] >= 3:
import PySimpleGUI as sg
else:
import PySimpleGUI27 as sg
layout = [
[sg.Text('Your typed chars appear here:'), sg.Text('', size=(20,1), key='-OUTPUT-')],
[sg.Input(do_not_clear=True, key='-IN-')],
[sg.Button('Show'), sg.Button('Exit')]
]
window = sg.Window('Window Title').Layout(layout)
while True: # Event Loop
event, values = window.Read()
print(event, values)
if event is None or event == 'Exit':
break
if event == 'Show':
# change the "output" element to be the value of "input" element
window.FindElement('-OUTPUT-').Update(values['-IN-'])
window.Close()