Observable

Observable

Mixin: notifies when fields change; auto-wraps lists/dicts to be observable.

Example:

import flet as ft
from dataclasses import dataclass


@ft.observable
@dataclass
class MyDataClass:
    x: int
    y: int


obj = MyDataClass(1, 2)


def listener(sender, field):
    print(f"Changed: {field} in {sender}")


obj.subscribe(listener)
obj.x = 3
obj.y = 4

subscribe

subscribe(fn: Listener) -> Callable[[], None]