如何在PySimpleGUI中通过单击按钮来添加字段或元素？

import PySimpleGUI as sg

window = sg.Window('Add Field Example', layout)

layout = [
    [sg.Text('Field Name:'), sg.Input(key='-FIELD-')],
    [sg.Button('Add Field', key='-ADD-')],
    [sg.Text('Fields:', size=(20, 1))],
    [sg.Listbox(values=[], size=(30, 5), key='-FIELDS-')]
]

while True:
    event, values = window.read()
    if event == sg.WINDOW_CLOSED:
        break
    elif event == '-ADD-':
        field_name = values['-FIELD-']
        window['-FIELDS-'].update(values['-FIELDS-'] + [field_name])

window['-FIELDS-'].update(values['-FIELDS-'] + [field_name])

if event == sg.WINDOW_CLOSED:
    break

import PySimpleGUI as sg

layout = [
    [sg.Text('Field Name:'), sg.Input(key='-FIELD-')],
    [sg.Button('Add Field', key='-ADD-')],
    [sg.Text('Fields:', size=(20, 1))],
    [sg.Listbox(values=[], size=(30, 5), key='-FIELDS-')]
]

window = sg.Window('Add Field Example', layout)

while True:
    event, values = window.read()
    if event == sg.WINDOW_CLOSED:
        break
    elif event == '-ADD-':
        field_name = values['-FIELD-']
        window['-FIELDS-'].update(values['-FIELDS-'] + [field_name])

window.close()