Toggling `window.frameless` property more than once fails

[ndonkoHenri]

Discussed in #4743

^{Originally posted by SKD8 January 20, 2025}

Question

When I tried to toggle the window frame, it went frameless on the first tap, but the frame did not restore back on the second tap. Why?

Code sample

import flet as ft

async def main(page: ft.Page):
    page.window.title_bar_hidden = True
    page.window.title_bar_buttons_hidden = True
    page.window.frameless = True
    page.window.height = 100
    page.window.width = 151

    def dock_click(e):
        page.window.frameless = not page.window.frameless
        page.update()

    dock = ft.WindowDragArea(
        content=ft.Container(
            width=100,
            height=100,
            bgcolor=ft.colors.WHITE70,
            border = ft.border.all(2, ft.colors.WHITE),
            border_radius=5,
            on_click=dock_click,
        ),
        maximizable=False,
    )

    page.add(dock)


ft.app(target=main)