16-better-select-theme.py

#

All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html

Contributors: Pavel Tisnovsky

link to source: https://github.com/tisnik/most-popular-python-libs/blob/master/PySimpleGUI/16-better-select-theme.py

link to source in literate programming format: https://tisnik.github.io/most-popular-python-libs/PySimpleGUI/16-better-select-theme.html

import PySimpleGUI as sg

themes = sorted(sg.list_of_look_and_feel_values())

#

vytvoření okna s ovládacími prvky

def main_window(theme=None):
    selected_theme = theme or themes[0]

#

ovládací prvky, které se mají zobrazit v okně

    layout = [
        [
            sg.Text("Theme"),
            sg.Combo(
                themes,
                default_value=selected_theme,
                readonly=True,
                key="theme",
                enable_events=True,
            ),
        ],
        [sg.Cancel("Exit")],
    ]

    sg.theme(selected_theme)
    return sg.Window("Window #4", layout)


window = main_window()

#

obsluha smyčky událostí (event loop)

while True:

#

přečtení události

    event, values = window.read()

#

reakce na událost “uzavření okna”

    if event in {sg.WIN_CLOSED, "Exit"}:
        break

#

reakce na výběr tématu

    if event == "theme":
        selected_theme = values["theme"]
        window.close()
        window = main_window(selected_theme)

#

po výskoku ze smyčky událostí aplikaci ukončíme

window.close()