Auto-update of Controls

[ndonkoHenri]

Description

Make possible the reactive/automatic update of any Control, ex: when a property is modified.

[ndonkoHenri]

Reopened because I think this issue was closed automatically but actually not fixed.

[omamkaz]

I think we need to add this code to the Control class

def __setattr__(self, name, value):
    super().__setattr__(name, value)

    if self.__page is not None and self.__page.auto_update:
        try:
            if "_Control__attrs" in self.__dict__ and name in self.__attrs:
                self.update()
        except:
            pass

and add this code to the Page class

def __init__(self):
    self.__auto_update = False

# auto-update
@property
def auto_update(self) -> PagePlatform:
    return self.__auto_update

@auto_update.setter
def auto_update(self, value: bool) -> None:
    self.__auto_update = value

and this a simple example of how it's work

import flet as ft


def main(page: ft.Page):
    page.auto_update = True
    ref = ft.Ref[ft.Container]()

    def on_click():
        ref.current.bgcolor = ft.Colors.ORANGE

    page.add(
        ft.Container(
            ref=ref,
            width=400,
            height=400,
            bgcolor=ft.Colors.INDIGO,
            on_click=lambda _: on_click(),
        )
    )


ft.app(main)