App drawer

[rajan308]

I am python beginner.
I am trying to create logout button on drawer.
What is the common logic ? How to make function to fires on_change event ?
Please give some example code

[ap4499]

Check out this:
https://github.com/flet-dev/examples

From memory, I think this one might contain some code which helps you:

navigation_drawer.py

In terms of your question, how to make a function fire when a button is clicked (I assume this is what you mean by on_change event), see the below, on_click:
https://flet.dev/docs/controls/elevatedbutton/

A basic example might look like this, for an on_click event.

import flet as ft

def main(page: ft.Page):
    def button_clicked(e):
        result = add_numbers(1, 1)
        result_textbox.value = str(result)
        page.update()

    def add_numbers(a, b):
        return a + b

    result_textbox = ft.TextField(label="Result")
    calculate_button = ft.ElevatedButton(text="Calculate", on_click=button_clicked)

    page.add(
        calculate_button,
        result_textbox,
    )

ft.app(target=main)