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Banner

A banner displays an important, succinct message, and provides actions for users to address (or dismiss the banner). A user action is required for it to be dismissed.

Banners are displayed at the top of the screen, below a top app bar. They are persistent and non-modal, allowing the user to either ignore them or interact with them at any time.

Examples​

Live example

import flet as ft

def main(page):
    def close_banner(e):
        page.banner.open = False
        page.update()

    page.banner = ft.Banner(
        bgcolor=ft.colors.AMBER_100,
        leading=ft.Icon(ft.icons.WARNING_AMBER_ROUNDED, color=ft.colors.AMBER, size=40),
        content=ft.Text(
            "Oops, there were some errors while trying to delete the file. What would you like me to do?"
        ),
        actions=[
            ft.TextButton("Retry", on_click=close_banner),
            ft.TextButton("Ignore", on_click=close_banner),
            ft.TextButton("Cancel", on_click=close_banner),
        ],
    )

    def show_banner_click(e):
        page.banner.open = True
        page.update()

    page.add(ft.ElevatedButton("Show Banner", on_click=show_banner_click))

ft.app(target=main)

Properties​

actions​

The set of actions that are displayed at the bottom or trailing side of the Banner.

Typically this is a list of TextButton controls.

bgcolor​

The color of the surface of this Banner.

content​

The content of the Banner. Typically a Text control.

content_padding​

The amount of space by which to inset the content.

If the actions are below the content, this defaults to padding.only(left=16.0, top=24.0, right=16.0, bottom=4.0).

If the actions are trailing the content, this defaults to padding.only(left=16.0, top=2.0).

See Container.padding for more information about padding and possible values.

content_text_style​

The style to be used for the Text controls in the content. Value is an instance of type TextStyle.

divider_color​

The color of the divider.

elevation​

The elevation of the banner.

force_actions_below​

An override to force the actions to be below the content regardless of how many there are.

If this is True, the actions will be placed below the content. If this is False, the actions will be placed on the trailing side of the content if actions's length is 1 and below the content if greater than 1.

Defaults to False.

leading​

The (optional) leading Control of the Banner.

Typically an Icon control.

leading_padding​

The amount of space by which to inset the leading control. This defaults to 16 virtual pixels. See Container.padding for more information about padding and possible values.

margin​

The amount of space surrounding the banner. See Container.margin for more information and possible values.

open​

Set to True to display a banner.

shadow_color​

The color of the shadow below the banner.

surface_tint_color​

The color used as an overlay on bgcolor to indicate elevation.

Events​

on_visible​

Fires when the banner is shown or made visible for the first time.