Window visibility not working as expected with `FLET_APP_HIDDEN`

[Camreishi]

Description

I am encountering an issue when trying to implement the code documented in the Flet.dev documentation regarding controlling window visibility (referencing the section at https://flet.dev/docs/controls/page/#window_visible). Specifically, I'm experimenting with the view=ft.AppView.FLET_APP_HIDDEN option to hide the application window as described.

However, it appears that this feature is not functioning as expected in recent versions of the Flet library (including but not limited to version 0.20.2). Upon applying FLET_APP_HIDDEN, the window does not get hidden as documented.

Code example to reproduce the issue:

from time import sleep

import flet as ft

def main(page: ft.Page):
    print("Starting the process...")
    page.add(
        ft.Text("Hello!")
    )

    sleep(3)
    print("Waking up from sleep...")
    page.window_visible = True
    page.update()

ft.app(target=main, view=ft.AppView.FLET_APP_HIDDEN)

Describe the results you received:

The window appears immediately upon program execution and does not get hidden during that period.

Describe the results you expected:

The program starts with a hidden window and makes it visible in 3 seconds.

Additional information you deem important (e.g. issue happens only occasionally): This feature functions as intended on another computer running Flet version 0.10.

Flet version (pip show flet):

flet 0.20.2

Operating system:

Windows 11 22H2

Please let me know if you need any more details or have suggestions for further troubleshooting steps. Thank you!

[karlz97]

Same problem here.

[ositoMalvado]

Same problem! Any solution?

[ndonkoHenri]

@ositoMalvado, it will be nice if you could provide more information (Flet version, OS, etc).

[ositoMalvado]

@ositoMalvado, it will be nice if you could provide more information (Flet version, OS, etc).

Sorry I have forgotten.

Flet 0.22.1 Python 3.11.9 Microsoft Windows 10.0.22631.3593

[Bronya0]

+1

[WagmanK]

Same problem

Python 3.12.1 Flet 0.22.1 Windows 10 Pro 22H2

[Kexi8BiT]

Same problem =)

Python 3.12.2 Flet 0.22.1 Windows 11 Pro 24H2

and even with this code, the window is visible)

import flet as ft
def main(page: ft.Page):
    page.add(ft.Text("hello world"))
ft.app(main, view=ft.FLET_APP_HIDDEN)

[Tempmail1234-pass]

Same problem

Python 3.10.13 Flet 0.23.1 Windows 10

[hanyce]

Any update on this issue?

[non-npc]

If I may propose a temporary solution to the window visibility bug. Could we set the window to minimized as the invisible state and if it is not minimized then it is in the visible state ?

[yst-one]

Python 3.12.2 Flet 0.24.1 Windows 11 专业版 24H2