CupertinoAlertDialog

An iOS-style alert dialog.

An alert dialog informs the user about situations that require acknowledgement. An alert dialog has an optional title and an optional list of actions. The title is displayed above the content and the actions are displayed below the content.

Inherits: DialogControl

Properties

• actions - A set of actions that are displayed at the bottom of the dialog.
• barrier_color - The color of the modal barrier below this dialog.
• content - The content of this dialog, displayed in a light font at the center of this dialog.
• inset_animation - The animation style to be used when the system keyboard intrudes into the space that the dialog is placed in.
• modal - Whether this dialog cannot be dismissed by clicking the area outside of it.
• title - The title of this dialog, displayed in a large font at the top of this dialog.

Examples

File deletion confirmation

play_arrowTry Online

import flet as ft


def main(page: ft.Page):
    page.horizontal_alignment = ft.CrossAxisAlignment.CENTER

    messages = ft.Column(tight=True)

    def handle_dialog_dismissal(_: ft.Event[ft.DialogControl]):
        messages.controls.append(ft.Text("Dialog dismissed"))

    def handle_action_click(e: ft.Event[ft.CupertinoDialogAction]):
        messages.controls.append(ft.Text(f"Action clicked: {e.control.content}"))
        page.pop_dialog()

    cupertino_alert_dialog = ft.CupertinoAlertDialog(
        title=ft.Text("Cupertino Alert Dialog"),
        content=ft.Text("Do you want to delete this file?"),
        on_dismiss=handle_dialog_dismissal,
        actions=[
            ft.CupertinoDialogAction(
                destructive=True,
                on_click=handle_action_click,
                content="Yes",
            ),
            ft.CupertinoDialogAction(
                default=True,
                on_click=handle_action_click,
                content="No",
            ),
        ],
    )

    page.add(
        ft.SafeArea(
            content=ft.Column(
                horizontal_alignment=ft.CrossAxisAlignment.CENTER,
                controls=[
                    ft.CupertinoFilledButton(
                        on_click=lambda _: page.show_dialog(cupertino_alert_dialog),
                        content="Open CupertinoAlertDialog",
                    ),
                    messages,
                ],
            ),
        )
    )


if __name__ == "__main__":
    ft.run(main)

Cupertino, material and adaptive

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from typing import Union

import flet as ft


def main(page: ft.Page):
    page.horizontal_alignment = ft.CrossAxisAlignment.CENTER
    page.scroll = ft.ScrollMode.AUTO

    messages = ft.Column(tight=True)

    def handle_action_click(
        e: ft.Event[Union[ft.TextButton, ft.CupertinoDialogAction]],
    ):
        messages.controls.append(ft.Text(f"Action clicked: {e.control.content}"))
        page.pop_dialog()

    cupertino_actions = [
        ft.CupertinoDialogAction(
            destructive=True,
            on_click=handle_action_click,
            content="Yes",
        ),
        ft.CupertinoDialogAction(
            default=False,
            on_click=handle_action_click,
            content="No",
        ),
    ]

    material_actions = [
        ft.TextButton(on_click=handle_action_click, content="Yes"),
        ft.TextButton(on_click=handle_action_click, content="No"),
    ]

    page.add(
        ft.SafeArea(
            content=ft.Column(
                horizontal_alignment=ft.CrossAxisAlignment.CENTER,
                controls=[
                    ft.FilledButton(
                        on_click=lambda _: page.show_dialog(
                            ft.AlertDialog(
                                title=ft.Text("Material Alert Dialog"),
                                content=ft.Text("Do you want to delete this file?"),
                                actions=material_actions,
                            )
                        ),
                        content="Open Material Dialog",
                    ),
                    ft.CupertinoFilledButton(
                        on_click=lambda _: page.show_dialog(
                            ft.CupertinoAlertDialog(
                                title=ft.Text("Cupertino Alert Dialog"),
                                content=ft.Text("Do you want to delete this file?"),
                                actions=cupertino_actions,
                            )
                        ),
                        content="Open Cupertino Dialog",
                    ),
                    ft.FilledButton(
                        adaptive=True,
                        bgcolor=ft.Colors.BLUE_ACCENT,
                        on_click=lambda _: page.show_dialog(
                            ft.AlertDialog(
                                adaptive=True,
                                title=ft.Text("Adaptive Alert Dialog"),
                                content=ft.Text("Do you want to delete this file?"),
                                actions=(
                                    cupertino_actions
                                    if page.platform.is_apple()
                                    else material_actions
                                ),
                            )
                        ),
                        content="Open Adaptive Dialog",
                    ),
                    messages,
                ],
            ),
        )
    )


if __name__ == "__main__":
    ft.run(main)

Properties

buildactionsclass-attributeinstance-attribute

actions: list[Control] = field(default_factory=list)

A set of actions that are displayed at the bottom of the dialog.

Typically this is a list of CupertinoDialogAction controls.

buildbarrier_colorclass-attributeinstance-attribute

barrier_color: ColorValue | None = None

The color of the modal barrier below this dialog.

If None, then DialogTheme.barrier_color is used. If that is also None, the default is Colors.BLACK_54.

buildcontentclass-attributeinstance-attribute

content: Control | None = None

The content of this dialog, displayed in a light font at the center of this dialog.

Typically a Column that contains the dialog's Text message.

buildinset_animationclass-attributeinstance-attribute

inset_animation: Animation = field(
    default_factory=lambda: Animation(
        curve=AnimationCurve.DECELERATE,
        duration=Duration(milliseconds=100),
    )
)

The animation style to be used when the system keyboard intrudes into the space that the dialog is placed in.

buildmodalclass-attributeinstance-attribute

modal: bool = False

Whether this dialog cannot be dismissed by clicking the area outside of it.

buildtitleclass-attributeinstance-attribute

title: StrOrControl | None = None

The title of this dialog, displayed in a large font at the top of this dialog.

Typically a Text control.