PySimpleGUI/DemoPrograms/Demo_Design_Patterns.py at master · DevLang-Python/PySimpleGUI · GitHub

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"""

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 "One Shot" window in 1 line of code

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 - One-shot Window #

# -----------------------------------#

import PySimpleGUI as sg

layout = [[ sg.Text('My Oneshot') ],

[ sg.Input(key='-IN-') ],

[ sg.Button('OK') ]]

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 3 - Persistent Window #

# -------------------------------------#

import PySimpleGUI as sg

layout = [[sg.Text('My layout')],

[sg.Input(key='-INPUT-')],

[sg.Button('OK'), sg.Button('Cancel')] ]

window = sg.Window('Design Pattern 3 - Persistent Window', layout)

while True: # Event Loop

event, values = window.read()

if event == sg.WIN_CLOSED or event == 'Cancel':

break

window.close()

# ------------------------------------------------------------------#

# DESIGN PATTERN 4 - Persistent Window with "early update" required #

# ------------------------------------------------------------------#

import PySimpleGUI as sg

layout = [[ sg.Text('My layout') ],

[sg.Input(key='-INPUT-')],

[sg.Text('Some text will be output here', key='-TEXT-KEY-')],

[ sg.Button('OK'), sg.Button('Cancel') ]]

window = sg.Window('Design Pattern 4', layout, finalize=True)

# 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 == sg.WIN_CLOSED or event == 'Cancel':

break

if event == 'OK':

window['-TEXT-KEY-'].update(values['-INPUT-'])

window.close()

PySimpleGUI/DemoPrograms/Demo_Design_Patterns.py at master · DevLang-Python/PySimpleGUI · GitHub

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