Page

Page

Bases: PageView

Page is a container for View controls.

A page instance and the root view are automatically created when a new user session started.

adaptive

adaptive: bool | None = None

Enables platform-specific rendering or inheritance of adaptiveness from parent controls.

appbar

appbar: AppBar | CupertinoAppBar | None

Gets or sets the top application bar (AppBar or CupertinoAppBar) for the view.

The app bar typically displays the page title and optional actions such as navigation icons, menus, or other interactive elements.

auth

auth: Authorization | None

auto_scroll

auto_scroll: bool

badge

badge: BadgeValue | None = None

A badge to show on top of this control.

bgcolor

bgcolor: ColorValue | None

bottom_appbar

bottom_appbar: BottomAppBar | None

browser_context_menu

browser_context_menu: BrowserContextMenu = field(
    default_factory=lambda: BrowserContextMenu(),
    metadata={"skip": True},
)

Used to enable or disable the context menu that appears when the user right-clicks on the web page.

Note

Web only.

client_ip

client_ip: str | None = None

IP address of the connected user.

🌎 Web only.

client_user_agent

client_user_agent: str | None = None

Browser details of the connected user.

🌎 Web only.

clipboard

clipboard: Clipboard = field(
    default_factory=lambda: Clipboard(),
    metadata={"skip": True},
)

TBD

col

col: ResponsiveNumber = 12

If a parent of this control is a ResponsiveRow, this property is used to determine how many virtual columns of a screen this control will span.

Can be a number or a dictionary configured to have a different value for specific breakpoints, for example col={"sm": 6}.

This control spans the 12 virtual columns by default.

Dimensions

Breakpoint	Dimension
xs	<576px
sm	≥576px
md	≥768px
lg	≥992px
xl	≥1200px
xxl	≥1400px

controls

controls: list[BaseControl]

dark_theme

dark_theme: Theme | None = None

Customizes the theme of the application when in dark theme mode.

data

data: Any = skip_field()

Arbitrary data of any type.

debug

debug: bool = False

True if Flutter client of Flet app is running in debug mode.

decoration

decoration: BoxDecoration | None

disabled

disabled: bool = False

Every control has disabled property which is False by default - control and all its children are enabled.

Note

The value of this property will be propagated down to all children controls recursively.

Example

For example, if you have a form with multiple entry controls you can disable them all together by disabling container:

ft.Column(
    disabled = True,
    controls=[
        ft.TextField(),
        ft.TextField()
    ]
)

drawer

drawer: NavigationDrawer | None

end_drawer

end_drawer: NavigationDrawer | None

executor

executor: ThreadPoolExecutor | None

expand

expand: bool | int | None = None

Specifies whether/how this control should expand to fill available space in its parent layout.

More information here.

Note

Has effect only if the direct parent of this control is one of the following controls, or their subclasses: Column, Row, View, Page.

expand_loose

expand_loose: bool = False

Allows the control to expand along the main axis if space is available, but does not require it to fill all available space.

More information here.

Note

If expand_loose is True, it will have effect only if:

• expand is not None and
• the direct parent of this control is one of the following controls, or their subclasses: Column, Row, View, Page.

floating_action_button

floating_action_button: FloatingActionButton | None

floating_action_button_location

floating_action_button_location: (
    FloatingActionButtonLocation | OffsetValue | None
)

fonts

fonts: dict[str, str] | None = None

Defines the custom fonts to be used in the application.

Value is a dictionary, in which the keys represent the font family name used for reference and the values: - Key: The font family name used for reference. - Value: The font source, either an absolute URL or a relative path to a local asset. The following font file formats are supported .ttc, .ttf and .otf.

Usage example here.

foreground_decoration

foreground_decoration: BoxDecoration | None

height

height: Number | None = None

Page height in logical pixels.

Note

• This property is read-only.
• To get or set the full window height including window chrome (e.g., title bar and borders) when running a Flet app on desktop, use the height property of Page.window instead.

horizontal_alignment

horizontal_alignment: CrossAxisAlignment | None

key

key: KeyValue | None = None

locale_configuration

locale_configuration: LocaleConfiguration | None = None

Configures supported locales and the current locale.

loop

loop: AbstractEventLoop

media

media: PageMediaData = field(
    default_factory=lambda: PageMediaData(
        padding=zero(),
        view_padding=zero(),
        view_insets=zero(),
        device_pixel_ratio=0,
    )
)

Represents the environmental metrics of a page or window.

multi_view

multi_view: bool = False

TBD

multi_views

multi_views: list[MultiView] = field(default_factory=list)

TBD

name

name: str

navigation_bar

navigation_bar: (
    NavigationBar | CupertinoNavigationBar | None
)

on_app_lifecycle_state_change

on_app_lifecycle_state_change: (
    EventHandler[AppLifecycleStateChangeEvent] | None
) = None

Triggers when app lifecycle state changes.

on_close

on_close: ControlEventHandler[Page] | None = None

Called when a session has expired after configured amount of time (60 minutes by default).

on_connect

on_connect: ControlEventHandler[Page] | None = None

Called when a web user (re-)connects to a page session.

It is not triggered when an app page is first opened, but is triggered when the page is refreshed, or Flet web client has re-connected after computer was unlocked. This event could be used to detect when a web user becomes "online".

on_disconnect

on_disconnect: ControlEventHandler[Page] | None = None

Called when a web user disconnects from a page session, i.e. closes browser tab/window.

on_error

on_error: ControlEventHandler[Page] | None = None

Called when unhandled exception occurs.

on_keyboard_event

on_keyboard_event: EventHandler[KeyboardEvent] | None = None

Called when a keyboard key is pressed.

on_login

on_login: EventHandler[LoginEvent] | None = None

Called upon successful or failed OAuth authorization flow.

See Authentication guide for more information and examples.

on_logout

on_logout: ControlEventHandler[Page] | None = None

Called after page.logout() call.

on_media_change

on_media_change: EventHandler[PageMediaData] | None = None

Called when media has changed.

on_multi_view_add

on_multi_view_add: (
    EventHandler[MultiViewAddEvent] | None
) = None

TBD

on_multi_view_remove

on_multi_view_remove: (
    EventHandler[MultiViewRemoveEvent] | None
) = None

TBD

on_platform_brightness_change

on_platform_brightness_change: (
    ControlEventHandler[Page] | None
) = None

Called when brightness of app host platform has changed.

on_resize

on_resize: EventHandler[PageResizeEvent] | None = None

Called when a user resizes a browser or native OS window containing Flet app, for example:

def page_resize(e):
    print("New page size:", page.window.width, page.window_height)

page.on_resize = page_resize

on_route_change

on_route_change: EventHandler[RouteChangeEvent] | None = (
    None
)

Called when page route changes either programmatically, by editing application URL or using browser Back/Forward buttons.

on_view_pop

on_view_pop: EventHandler[ViewPopEvent] | None = None

Called when the user clicks automatic "Back" button in AppBar control.

opacity

opacity: Number = 1.0

Defines the transparency of the control.

Value ranges from 0.0 (completely transparent) to 1.0 (completely opaque without any transparency).

overlay

overlay: list[BaseControl]

padding

padding: PaddingValue | None

page

page: Page | PageView | None

The page (of type Page or PageView) to which this control belongs to.

parent

parent: BaseControl | None

The direct ancestor(parent) of this control.

It defaults to None and will only have a value when this control is mounted (added to the page tree).

The Page control (which is the root of the tree) is an exception - it always has parent=None.

platform

platform: PagePlatform | None = None

Operating system the application is running on.

platform_brightness

platform_brightness: Brightness | None = None

The current brightness mode of the host platform. (readonly)

pubsub

pubsub: PubSubClient

pwa

pwa: bool = False

True if the application is running as Progressive Web App (PWA).

Value is read-only.

query

query: QueryString

route

route: str | None = None

Get or sets page's navigation route. See Navigation and routing section for more information and examples.

rtl

rtl: bool = False

Whether the text direction of the control should be right-to-left (RTL).

scroll

scroll: ScrollMode | None

services

services: list[Service]

session

session: SessionStorage

shared_preferences

shared_preferences: SharedPreferences = field(
    default_factory=lambda: SharedPreferences(),
    metadata={"skip": True},
)

TBD

show_semantics_debugger

show_semantics_debugger: bool | None = None

Whether to turn on an overlay that shows the accessibility information reported by the framework.

spacing

spacing: Number | None

storage_paths

storage_paths: StoragePaths = field(
    default_factory=lambda: StoragePaths(),
    metadata={"skip": True},
)

TBD

test

test: bool = False

TBD

theme

theme: Theme | None = None

Customizes the theme of the application when in light theme mode. Currently, a theme can only be automatically generated from a "seed" color. For example, to generate light theme from a green color.

theme_mode

theme_mode: ThemeMode | None = SYSTEM

The page's theme mode.

title

title: str | None = None

Page or window title.

tooltip

tooltip: TooltipValue | None = None

The tooltip ot show when this control is hovered over.

url

url: str | None

url_launcher

url_launcher: UrlLauncher = field(
    default_factory=lambda: UrlLauncher(),
    metadata={"skip": True},
)

TBD

vertical_alignment

vertical_alignment: MainAxisAlignment | None

views

views: list[View] = field(default_factory=lambda: [View()])

A list of views managed by the page.

Each View represents a distinct navigation state or screen in the application.

The first view in the list is considered the active one by default.

visible

visible: bool = True

Every control has visible property which is True by default - control is rendered on the page. Setting visible to False completely prevents control (and all its children if any) from rendering on a page canvas. Hidden controls cannot be focused or selected with a keyboard or mouse and they do not emit any events.

wasm

wasm: bool = False

TBD

web

web: bool = False

True if the application is running in the web browser.

width

width: Number | None = None

Page width in logical pixels.

Note

• This property is read-only.
• To get or set the full window height including window chrome (e.g., title bar and borders) when running a Flet app on desktop, use the width property of Page.window instead.

window

window: Window = field(default_factory=lambda: Window())

A class with properties/methods/events to control app's native OS window.

add

add(*controls: Control) -> None

Adds controls to the page.

page.add(ft.Text("Hello!"), ft.FilledButton("Button"))

before_event

before_event(e: ControlEvent)

before_update

before_update()

build

build()

Called once during control initialization to define its child controls. self.page is available in this method.

can_launch_url_async

can_launch_url_async(url: str)

Checks whether the specified URL can be handled by some app installed on the device.

Returns True if it is possible to verify that there is a handler available. A False return value can indicate either that there is no handler available, or that the application does not have permission to check. For example:

• On recent versions of Android and iOS, this will always return False unless the application has been configuration to allow querying the system for launch support.
• On web, this will always return False except for a few specific schemes that are always assumed to be supported (such as http(s)), as web pages are never allowed to query installed applications.

clean

clean() -> None

close

close(control: DialogControl) -> None

close_in_app_web_view

close_in_app_web_view() -> None

Closes in-app web view opened with launch_url().

📱 Mobile only.

close_in_app_web_view_async

close_in_app_web_view_async() -> None

Closes in-app web view opened with launch_url().

📱 Mobile only.

did_mount

did_mount()

error

error(message: str) -> None

get_control

get_control(id: int) -> BaseControl | None

Get a control by its id.

Example:

import flet as ft


def main(page: ft.Page):
    x = ft.IconButton(ft.Icons.ADD)
    page.add(x)
    print(type(page.get_control(x.uid)))


ft.run(main)

get_session

get_session()

get_upload_url

get_upload_url(file_name: str, expires: int) -> str

Generates presigned upload URL for built-in upload storage:

• file_name - a relative to upload storage path.
• expires - a URL time-to-live in seconds.

For example:

upload_url = page.get_upload_url("dir/filename.ext", 60)

To enable built-in upload storage provide upload_dir argument to flet.app() call:

ft.run(main, upload_dir="uploads")

go

go(
    route: str,
    skip_route_change_event: bool = False,
    **kwargs: Any,
) -> None

A helper method that updates page.route, calls page.on_route_change event handler to update views and finally calls page.update().

init

init()

insert

insert(at: int, *controls: Control) -> None

Inserts controls at specific index of page.controls list.

is_isolated

is_isolated()

launch_url

launch_url(
    url: str,
    web_window_name: str | None = None,
    web_popup_window: bool | None = False,
    window_width: int | None = None,
    window_height: int | None = None,
) -> None

Opens url in a new browser window.

Optional method arguments:

• web_window_name - window tab/name to open URL in: UrlTarget.SELF - the same browser tab, UrlTarget.BLANK - a new browser tab (or in external application on mobile device) or <your name> - a named tab.
• web_popup_window - set to True to display a URL in a browser popup window. Defaults to False.
• window_width - optional, popup window width.
• window_height - optional, popup window height.

launch_url_async

launch_url_async(
    url: str,
    web_window_name: str | None = None,
    web_popup_window: bool | None = False,
    window_width: int | None = None,
    window_height: int | None = None,
) -> None

Opens provided url in a new browser window.

PARAMETER	DESCRIPTION
url	The URL to open. TYPE: str
web_window_name	Window tab/name to open URL in. Use UrlTarget.SELF for the same browser tab, UrlTarget.BLANK for a new browser tab (or in external application on mobile device), or a custom name for a named tab. TYPE: str | None DEFAULT: None
web_popup_window	Display the URL in a browser popup window. TYPE: bool | None DEFAULT: False
window_width	Popup window width. TYPE: int | None DEFAULT: None
window_height	Popup window height. TYPE: int | None DEFAULT: None

login_async

login_async(
    provider: OAuthProvider,
    fetch_user: bool = True,
    fetch_groups: bool = False,
    scope: list[str] | None = None,
    saved_token: str | None = None,
    on_open_authorization_url: Callable[
        [str], Coroutine[Any, Any, None]
    ]
    | None = None,
    complete_page_html: str | None = None,
    redirect_to_page: bool | None = False,
    authorization: type[AT] = AuthorizationImpl,
) -> AT

Starts OAuth flow.

See Authentication guide for more information and examples.

logout

logout() -> None

Clears current authentication context. See Authentication guide for more information and examples.

open

open(control: DialogControl) -> None

pop_dialog

pop_dialog() -> DialogControl | None

remove

remove(*controls: Control) -> None

Removes specific controls from page.controls list.

remove_at

remove_at(index: int) -> None

Remove controls from page.controls list at specific index.

run_task

run_task(
    handler: Callable[InputT, Awaitable[RetT]],
    *args: args,
    **kwargs: kwargs,
) -> Future[RetT]

Run handler coroutine as a new Task in the event loop associated with the current page.

run_thread

run_thread(
    handler: Callable[InputT, Any],
    *args: args,
    **kwargs: kwargs,
) -> None

Run handler function as a new Thread in the executor associated with the current page.

scroll_to

scroll_to(
    offset: Number | None = None,
    delta: Number | None = None,
    scroll_key: str
    | int
    | float
    | bool
    | ScrollKey
    | None = None,
    duration: DurationValue | None = None,
    curve: AnimationCurve | None = None,
) -> None

Moves scroll position to either absolute offset, relative delta or jump to the control with specified scroll_key.

See Column.scroll_to() for method details and examples.

show_dialog

show_dialog(dialog: DialogControl) -> None

TBD

update

update(*controls) -> None

will_unmount

will_unmount()