Tabs

Examples

Live example

Basic Example

import flet as ft


def main(page: ft.Page):
    t = ft.Tabs(
        selected_index=1,
        animation_duration=300,
        tabs=[
            ft.Tab(
                label="Tab 1",
                content=ft.Container(
                    content=ft.Text("This is Tab 1"), alignment=ft.Alignment.CENTER
                ),
            ),
            ft.Tab(
                label="Tab 2",
                icon=ft.Icons.SETTINGS,
                content=ft.Container(
                    content=ft.Text("This is Tab 2"), alignment=ft.Alignment.CENTER
                ),
            ),
            ft.Tab(
                label=ft.CircleAvatar(
                    foreground_image_src="https://avatars.githubusercontent.com/u/7119543?s=88&v=4"
                ),
                content=ft.Container(
                    content=ft.Text("This is Tab 3"), alignment=ft.Alignment.CENTER
                ),
            ),
        ],
        expand=1,
    )

    page.add(t)


ft.run(main)

Nesting tabs

import flet as ft


def main(page: ft.Page):
    page.add(
        ft.Tabs(
            selected_index=1,
            animation_duration=300,
            expand=1,
            tabs=[
                ft.Tab(
                    label="Dining",
                    icon=ft.Icons.RESTAURANT,
                    content=ft.Tabs(
                        secondary=True,
                        tabs=[
                            ft.Tab(
                                label="Fast Food",
                                content=ft.Text("Grab something on the go!"),
                            ),
                            ft.Tab(
                                label="Fine Dining", content=ft.Text("Take your time!")
                            ),
                        ],
                    ),
                ),
                ft.Tab(
                    label="Entertainment",
                    icon=ft.Icons.LOCAL_ACTIVITY,
                    content=ft.Tabs(
                        secondary=True,
                        tabs=[
                            ft.Tab(label="Cinema", content=ft.Text("Find a Film!")),
                            ft.Tab(
                                label="Music", content=ft.Text("Listen to some Tunes!")
                            ),
                        ],
                    ),
                ),
                ft.Tab(
                    label="Lodging",
                    icon=ft.Icons.HOTEL,
                    content=ft.Tabs(
                        secondary=True,
                        tabs=[
                            ft.Tab(label="Hotel", content=ft.Text("Enjoy your Room!")),
                            ft.Tab(label="Hostel", content=ft.Text("Grab a Bunk!")),
                        ],
                    ),
                ),
            ],
        )
    )


ft.run(main)

Dynamic tabs

import asyncio

import flet as ft


async def main(page: ft.Page):
    page.title = "Tabs Example"

    page.add(
        t := ft.Tabs(
            selected_index=1,
            animation_duration=300,
            expand=1,
            tabs=[
                ft.Tab(
                    label="Tab 1",
                    content=ft.Container(
                        content=ft.Text("This is Tab 1"), alignment=ft.Alignment.CENTER
                    ),
                ),
                ft.Tab(
                    label=ft.Icon(ft.Icons.MESSAGE),
                    content=ft.Text("This is Tab 2"),
                ),
                ft.Tab(
                    label="Tab 3",
                    icon=ft.Icons.IRON,
                    content=ft.Text("This is Tab 3"),
                ),
            ],
        )
    )

    await asyncio.sleep(7)
    t.selected_index = 2
    page.update()

    await asyncio.sleep(3)
    t.selected_index = 0
    page.update()

    await asyncio.sleep(3)
    t.selected_index = 1
    t.tabs.pop(0)
    t.tabs[1].content = ft.Text("Blah blah blah")
    page.update()

    await asyncio.sleep(3)
    t.tabs.clear()
    page.update()

    await asyncio.sleep(3)
    t.tabs.append(
        ft.Tab(
            label="Tab 4",
            icon=ft.Icons.LOCK,
            content=ft.Text("This is Tab 4"),
        )
    )
    t.tabs.append(
        ft.Tab(
            label="Tab 5",
            icon=ft.Icons.SIP_SHARP,
            content=ft.Text("This is Tab 5"),
        )
    )
    page.update()


ft.run(main)

Tabs

Bases: ConstrainedControl, AdaptiveControl

Used for navigating frequently accessed, distinct content categories. Tabs allow for navigation between two or more content views and relies on text headers to articulate the different sections of content.

adaptive

adaptive: bool | None = None

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

animate_offset

animate_offset: AnimationValue | None = None

Enables implicit animation of the offset property.

More information here.

animate_opacity

animate_opacity: AnimationValue | None = None

Enables implicit animation of the opacity property.

More information here.

animate_position

animate_position: AnimationValue | None = None

Enables implicit animation of the positioning properties (left, right, top and bottom).

More information here.

animate_rotation

animate_rotation: AnimationValue | None = None

Enables implicit animation of the rotate property.

More information here.

animate_scale

animate_scale: AnimationValue | None = None

Enables implicit animation of the scale property.

More information here.

animate_size

animate_size: AnimationValue | None = None

TBD

animation_duration

animation_duration: DurationValue = field(
    default_factory=lambda: Duration(milliseconds=50)
)

Duration of animation in milliseconds of switching between tabs.

aspect_ratio

aspect_ratio: Number | None = None

TBD

badge

badge: BadgeValue | None = None

A badge to show on top of this control.

bottom

bottom: Number | None = None

The distance that the child's bottom edge is inset from the bottom of the stack.

Note

Effective only if this control is a descendant of one of the following: Stack control, Page.overlay list.

clip_behavior

clip_behavior: ClipBehavior = HARD_EDGE

The content will be clipped (or not) according to this option.

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

data

data: Any = skip_field()

Arbitrary data of any type.

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()
    ]
)

divider_color

divider_color: ColorValue | None = None

The color of the divider.

divider_height

divider_height: Number | None = None

The height of the divider.

Defaults to 1.0.

enable_feedback

enable_feedback: bool | None = None

Whether detected gestures should provide acoustic and/or haptic feedback.

On Android, for example, setting this to True produce a click sound and a long-press will produce a short vibration.

Defaults to True.

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.

height

height: Number | None = None

Imposed Control height in virtual pixels.

indicator_border_radius

indicator_border_radius: BorderRadiusValue | None = None

The radius of the indicator's corners.

indicator_border_side

indicator_border_side: BorderSide | None = None

The color and weight of the horizontal line drawn below the selected tab.

indicator_color

indicator_color: ColorValue | None = None

The color of the indicator(line that appears below the selected tab).

indicator_padding

indicator_padding: PaddingValue = 0

Locates the selected tab's underline relative to the tab's boundary.

The indicator_tab_size property can be used to define the tab indicator's bounds in terms of its (centered) tab control with False, or the entire tab with True.

indicator_tab_size

indicator_tab_size: bool | None = None

Whether the indicator should take entire tab.

indicator_thickness

indicator_thickness: Number = 2.0

The thickness of the indicator. Value must be greater than zero.

key

key: (
    str | int | float | bool | ValueKey | ScrollKey | None
) = None

label_color

label_color: ColorValue | None = None

The color of selected tab labels.

label_padding

label_padding: PaddingValue | None = None

The padding around the tab label.

label_text_style

label_text_style: TextStyle | None = None

The text style of the tab labels.

left

left: Number | None = None

The distance that the child's left edge is inset from the left of the stack.

Note

Effective only if this control is a descendant of one of the following: Stack control, Page.overlay list.

mouse_cursor

mouse_cursor: MouseCursor | None = None

The cursor to be displayed when a mouse pointer enters or is hovering over this control.

offset

offset: OffsetValue | None = None

Applies a translation transformation before painting the control.

The translation is expressed as an Offset scaled to the control's size. So, Offset(x=0.25, y=0), for example, will result in a horizontal translation of one quarter the width of this control.

Example

The following example displays container at 0, 0 top left corner of a stack as transform applies -1 * 100, -1 * 100 (offset * control's size) horizontal and vertical translations to the control:

import flet as ft

def main(page: ft.Page):
    page.add(
        ft.Stack(
            width=1000,
            height=1000,
            controls=[
                ft.Container(
                    bgcolor="red",
                    width=100,
                    height=100,
                    left=100,
                    top=100,
                    offset=ft.Offset(-1, -1),
                )
            ],
        )
    )

ft.run(main)

on_animation_end

on_animation_end: (
    ControlEventHandler[ConstrainedControl] | None
) = None

Called when animation completes.

Can be used to chain multiple animations.

The data property of the event handler argument contains the name of the animation.

More information here.

on_change

on_change: ControlEventHandler[Tabs] | None = None

Called when selected_index changes.

on_click

on_click: ControlEventHandler[Tabs] | None = None

Called when a tab is clicked.

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_color

overlay_color: ControlStateValue[ColorValue] | None = None

Defines the ink response focus, hover, and splash colors in various ControlState states.

The following states are supported: ControlState.PRESSED, ControlState.HOVERED and ControlState.FOCUSED.

padding

padding: PaddingValue | None = None

The padding around the Tabs control.

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.

right

right: Number | None = None

The distance that the child's right edge is inset from the right of the stack.

Note

Effective only if this control is a descendant of one of the following: Stack control, Page.overlay list.

rotate

rotate: RotateValue | None = None

Transforms this control using a rotation around its center.

The value of rotate property could be one of the following types:

• number - a rotation in clockwise radians. Full circle 360° is math.pi * 2 radians, 90° is pi / 2, 45° is pi / 4, etc.
• Rotate - allows to specify rotation angle as well as alignment - the location of rotation center.

Example

For example:

ft.Image(
    src="https://picsum.photos/100/100",
    width=100,
    height=100,
    border_radius=5,
    rotate=Rotate(angle=0.25 * pi, alignment=ft.Alignment.CENTER_LEFT)
)

rtl

rtl: bool = False

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

scale

scale: ScaleValue | None = None

Scales this control along the 2D plane. Default scale factor is 1.0, meaning no-scale.

Setting this property to 0.5, for example, makes this control twice smaller, while 2.0 makes it twice larger.

Different scale multipliers can be specified for x and y axis, by setting Control.scale property to an instance of Scale class. Either scale or scale_x and scale_y could be specified, but not all of them.

Example

ft.Image(
    src="https://picsum.photos/100/100",
    width=100,
    height=100,
    border_radius=5,
    scale=ft.Scale(scale_x=2, scale_y=0.5)
)

scrollable

scrollable: bool = True

Whether this tab bar can be scrolled horizontally.

If scrollable is True, then each tab is as wide as needed for its label and the entire Tabs controls is scrollable. Otherwise each tab gets an equal share of the available space.

secondary

secondary: bool = False

Whether to create a secondary/nested tab bar.

Secondary tabs are used within a content area to further separate related content and establish hierarchy.

selected_index

selected_index: int = 0

The index of currently selected tab.

splash_border_radius

splash_border_radius: BorderRadiusValue | None = None

Defines the clipping radius of splashes that extend outside the bounds of the tab.

tab_alignment

tab_alignment: TabAlignment | None = None

Specifies the horizontal alignment of the tabs within the Tabs control.

Defaults to TabAlignment.START, if scrollable=True, and to TabAlignment.FILL, if scrollable=False.

tabs

tabs: list[Tab] = field(default_factory=list)

A list of Tab controls.

tooltip

tooltip: TooltipValue | None = None

The tooltip ot show when this control is hovered over.

top

top: Number | None = None

The distance that the child's top edge is inset from the top of the stack.

Note

Effective only if this control is a descendant of one of the following: Stack control, Page.overlay list.

unselected_label_color

unselected_label_color: ColorValue | None = None

The color of unselected tab labels.

unselected_label_text_style

unselected_label_text_style: TextStyle | None = None

The text style of the unselected tab labels.

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.

width

width: Number | None = None

Imposed Control width in virtual pixels.

before_event

before_event(e: ControlEvent)

before_update

before_update()

clean

clean() -> None

did_mount

did_mount()

init

init()

is_isolated

is_isolated()

update

update() -> None

will_unmount

will_unmount()