How to put multiple windows in fullscreen at once in PySimpleGUI

Question

I am trying to create a few windows, which I need all of them to be in fullscreen. I am aware of .Maximize() but I can't get it work properly in this code. Any ideas? Thank you!

import PySimpleGUI as sg

def make_window1():
    layout = [[sg.Text('Window 1')],
              [sg.Button('Next >'), sg.Button('Exit')]]

    return sg.Window('Window 1', layout, finalize=True).Finalize()


def make_window2():
    layout = [[sg.Text('Window 2')],
               [sg.Button('Next >'), sg.Button('Exit')]]

    return sg.Window('Window 2', layout, finalize=True).Finalize()


window1, window2 = make_window1(), None

while True:
    window, event, values = sg.read_all_windows()
    window.Maximize()
    if window == window1 and event in (sg.WIN_CLOSED, 'Exit'):
        break

    if window == window1:
        if event == 'Next >':
            window1.hide()
            window2 = make_window2()

    if window == window2 and event in (sg.WIN_CLOSED, 'Exit'):
        break


window.close()

Answer 1

Just call method maximize() of window after it finalized.

Four ways here to show the switching of windows.

1. New window created with different layout.

import PySimpleGUI as sg

def make_window1():
    layout = [[sg.Text('Window 1')],
              [sg.Button('Next >'), sg.Button('Exit')]]
    window = sg.Window('Window 1', layout, finalize=True)
    window.maximize()
    return window

def make_window2():
    layout = [[sg.Text('Window 2')],
               [sg.Button('Next >'), sg.Button('Exit')]]
    window = sg.Window('Window 1', layout, finalize=True)
    window.maximize()
    return window

window, now = make_window1(), 1

while True:

    event, values = window.read()

    if event in (sg.WINDOW_CLOSED, 'Exit'):
        break
    elif event == 'Next >':
        win, now = (make_window1(), 1) if now == 2 else (make_window2(), 2)
        window.close()
        window = win

window.close()

2. Dual window created at same time and decide which shown on screen.

import PySimpleGUI as sg

def make_window1():
    layout = [[sg.Text('Window 1')],
              [sg.Button('Next >'), sg.Button('Exit')]]
    window = sg.Window('Window 1', layout, finalize=True)
    return window


def make_window2():
    layout = [[sg.Text('Window 2')],
               [sg.Button('Next >'), sg.Button('Exit')]]
    window = sg.Window('Window 1', layout, finalize=True)
    return window

window1, window2 = make_window1(), make_window2()
window1.maximize()
window2.hide()

while True:

    window, event, values = sg.read_all_windows()

    if event in (sg.WINDOW_CLOSED, 'Exit'):
        break
    elif event == 'Next >':
        window.hide()
        window = window1 if window == window2 else window2
        window.un_hide()
        window.maximize()

window1.close()
window2.close()

3. Using sg.Column with attribute visible True or False

import PySimpleGUI as sg

def swap(now, step):
    window[f'COLUMN {now}'].update(visible=False)
    now = (now+step) % total
    window[f'COLUMN {now}'].update(visible=True)
    return now

def column_layout(index):
    layout = [[sg.Text(f'Window {index+1}')]]
    return layout

total, now = 5, 0

sg.theme("DarkBlue")
sg.set_options(font=('Courier New', 16))

layout = [
    [sg.Column(column_layout(i), visible=(i==0), key=f'COLUMN {i}') for i in range(total)],
    [sg.VPush()],
    [sg.Button('< PREV'), sg.Push(), sg.Button('Exit'), sg.Push(), sg.Button('NEXT >')],
]

window = sg.Window('Title', layout, finalize=True)
window.maximize()

while True:

    event, values = window.read()
    if event==sg.WINDOW_CLOSED or event.startswith('Exit'):
        break
    elif event in ("< PREV", "NEXT >"):
        now = swap(now, 1 if event == "NEXT >" else -1)

window.close()

Using sg.TabGroup

import PySimpleGUI as sg

def tab_layout(index):
    layout = [[sg.Text(f'Window {index+1}')]]
    return layout

sg.theme("DarkBlue")
sg.set_options(font=('Courier New', 16))

total, now = 5, 0

tab_group = [[sg.Tab(f"TAB {i}", tab_layout(i), key=f"TAB {i}")] for i in range(5)]
layout = [
    [sg.TabGroup(tab_group, border_width=0, pad=(0, 0), expand_x=True, expand_y=True, key='TABGROUP')],
    [sg.VPush()],
    [sg.Button('< PREV'), sg.Push(), sg.Button('Exit'), sg.Push(), sg.Button('NEXT >')],
]
window = sg.Window("Title", layout, finalize=True)
style = sg.ttk.Style()
style.layout('TNotebook.Tab', [])                           # Hide tab bar
window.maximize()

while True:

    event, values = window.read()
    if event in (sg.WINDOW_CLOSED, "Exit"):
        break
    elif event in ("< PREV", "NEXT >"):
        now = (now+1)%total if event == "NEXT >" else (now-1)%total
        window[f"TAB {now}"].select()

window.close()