TextField

A text field lets the user enter text, either with hardware keyboard or with an onscreen keyboard.

Example:

ft.TextField(label="Name", hint_text="Jane Doe")

TextField

Inherits: FormFieldControl, AdaptiveControl

Properties

• always_call_on_tap - Whether on_click should be called for every tap.
• animate_cursor_opacity - Whether the text cursor animates between transparent and opaque during each blink.
• autocorrect - Whether to enable autocorrection.
• autofill_hints - Helps the autofill service identify the type of this text input.
• autofocus - True if the control will be selected as the initial focus.
• can_request_focus - Whether this field can request focus.
• can_reveal_password - Displays a toggle icon button that allows revealing the entered password.
• capitalization - Enables automatic on-the-fly capitalization of entered text.
• clip_behavior - How the field's contents should be clipped.
• cursor_color - The color of TextField cursor.
• cursor_error_color - The color of the text cursor while the field is showing an error.
• cursor_height - Sets cursor height.
• cursor_radius - Sets cursor radius.
• cursor_width - Sets cursor width.
• enable_ime_personalized_learning - Whether the input method is allowed to learn from what the user types.
• enable_interactive_selection - Whether interactive text selection is enabled.
• enable_stylus_handwriting - Whether this field supports stylus handwriting input.
• enable_suggestions - Whether to show input suggestions as the user types.
• ignore_pointers - Whether this field ignores pointer events.
• ignore_up_down_keys - Whether to intercept Arrow-Up and Arrow-Down when this field has focus.
• input_filter - Provides as-you-type filtering/validation.
• keyboard_brightness - The brightness to use for the onscreen keyboard.
• keyboard_type - The type of keyboard to use for editing the text.
• max_length - Limits a maximum number of characters that can be entered into TextField.
• max_lines - The maximum number of lines to show at one time, wrapping if necessary.
• min_lines - The minimum number of lines to occupy when the content spans fewer lines.
• mouse_cursor - The mouse pointer to show while hovering over the field.
• multiline - Whether this field can contain multiple lines of text.
• obscuring_character - The single character used to mask the text when password is True.
• password - Whether to hide the text being edited.
• read_only - Whether the text can be changed.
• scroll_padding - Padding to keep around the field when a surrounding scrollable scrolls it into view.
• selection - Represents the current text selection or caret position in the field.
• selection_color - The color of TextField selection.
• shift_enter - Changes the behavior of Enter button in multiline textfield to be chat-like, i.e.
• show_cursor - Whether the field's cursor is to be shown.
• smart_dashes_type - Whether to allow the platform to automatically format dashes.
• smart_quotes_type - Whether to allow the platform to automatically format quotes.
• strut_style - The StrutStyle used for vertical text layout.
• text_align - How the text should be aligned horizontally.
• value - Current value of this text field.

Events

• on_blur - Called when the control has lost focus.
• on_change - Called when the typed input for the TextField has changed.
• on_click - Called when the field is tapped.
• on_focus - Called when the control has received focus.
• on_selection_change - Called when the text selection or caret position changes.
• on_submit - Called when user presses ENTER while focus is on TextField.
• on_tap_outside - Called when a pointer-down event occurs outside the field while it is focused.

Examples

TextField

play_arrowTry Online

import flet as ft


def main(page: ft.Page):
    def handle_button_click(e: ft.Event[ft.Button]):
        message.value = (
            f"Textboxes values are:  '{tb1.value}', '{tb2.value}', "
            f"'{tb3.value}', '{tb4.value}', '{tb5.value}'."
        )

    page.add(
        ft.SafeArea(
            content=ft.Column(
                controls=[
                    tb1 := ft.TextField(label="Standard"),
                    tb2 := ft.TextField(
                        label="Disabled",
                        disabled=True,
                        value="First name",
                    ),
                    tb3 := ft.TextField(
                        label="Read-only",
                        read_only=True,
                        value="Last name",
                    ),
                    tb4 := ft.TextField(
                        label="With placeholder",
                        hint_text="Please enter text here",
                    ),
                    tb5 := ft.TextField(
                        label="With an icon",
                        icon=ft.Icons.EMOJI_EMOTIONS,
                    ),
                    ft.Button(content="Submit", on_click=handle_button_click),
                    message := ft.Text(),
                ],
            ),
        ),
    )


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

Handling change events

play_arrowTry Online

import flet as ft


def main(page: ft.Page):
    def handle_field_change(e: ft.Event[ft.TextField]):
        message.value = e.control.value

    page.add(
        ft.SafeArea(
            content=ft.Column(
                controls=[
                    ft.TextField(
                        key="handling_change_textfield",
                        label="Textbox with 'change' event:",
                        on_change=handle_field_change,
                    ),
                    message := ft.Text(),
                ],
            ),
        ),
    )


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

Handling selection changes

play_arrowTry Online

import flet as ft


def main(page: ft.Page):
    page.title = "Text selection"

    def handle_selection_change(e: ft.TextSelectionChangeEvent[ft.TextField]):
        selection.value = (
            f"Selection: '{e.selected_text}'" if e.selected_text else "No selection."
        )
        selection_details.value = f"start={e.selection.start}, end={e.selection.end}"
        caret.value = f"Caret position: {e.selection.end}"

    async def select_characters(e: ft.Event[ft.Button]):
        await field.focus()
        field.selection = ft.TextSelection(
            base_offset=0, extent_offset=len(field.value)
        )

    async def move_caret(e: ft.Event[ft.Button]):
        await field.focus()
        field.selection = ft.TextSelection(base_offset=0, extent_offset=0)

    page.add(
        ft.SafeArea(
            content=ft.Column(
                spacing=10,
                controls=[
                    field := ft.TextField(
                        value=(
                            "Lorem ipsum dolor sit amet, consectetur adipiscing elit."
                        ),
                        multiline=True,
                        min_lines=3,
                        autofocus=True,
                        on_selection_change=handle_selection_change,
                    ),
                    selection := ft.Text("Select some text from the field."),
                    selection_details := ft.Text(),
                    caret := ft.Text("Caret position: -"),
                    ft.Button(
                        content="Select all text",
                        on_click=select_characters,
                    ),
                    ft.Button(
                        content="Move caret to start",
                        on_click=move_caret,
                    ),
                ],
            ),
        )
    )


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

Password with reveal button

play_arrowTry Online

import flet as ft


def main(page: ft.Page):
    page.add(
        ft.SafeArea(
            content=ft.TextField(
                key="password_textfield",
                label="Password with reveal button",
                password=True,
                can_reveal_password=True,
            ),
        )
    )


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

Multiline fields

play_arrowTry Online

import flet as ft


def main(page: ft.Page):
    page.add(
        ft.SafeArea(
            content=ft.Column(
                controls=[
                    ft.TextField(
                        key="multiline_standard",
                        label="Standard",
                        multiline=True,
                    ),
                    ft.TextField(
                        label="Disabled",
                        multiline=True,
                        disabled=True,
                        value="line1\nline2\nline3\nline4\nline5",
                    ),
                    ft.TextField(
                        key="multiline_auto_height",
                        label="Auto adjusted height with max lines",
                        multiline=True,
                        min_lines=1,
                        max_lines=3,
                    ),
                ],
            ),
        ),
    )


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

Underlined and borderless TextFields

play_arrowTry Online

import flet as ft


def main(page: ft.Page):
    page.add(
        ft.SafeArea(
            content=ft.Column(
                controls=[
                    ft.TextField(
                        key="underlined_field",
                        label="Underlined",
                        border=ft.UnderlineInputBorder(),
                        hint_text="Enter text here",
                    ),
                    ft.TextField(
                        key="underlined_filled_field",
                        label="Underlined filled",
                        border=ft.UnderlineInputBorder(),
                        filled=True,
                        hint_text="Enter text here",
                    ),
                    ft.TextField(
                        key="borderless_field",
                        label="Borderless",
                        border=ft.InputBorder.none(),
                        hint_text="Enter text here",
                    ),
                    ft.TextField(
                        key="borderless_filled_field",
                        label="Borderless filled",
                        border=ft.InputBorder.none(),
                        filled=True,
                        hint_text="Enter text here",
                    ),
                ],
            ),
        ),
    )


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

Setting prefixes and suffixes

play_arrowTry Online

import flet as ft


def main(page: ft.Page):
    def handle_button_click(e: ft.Event[ft.Button]):
        message.value = (
            "Textboxes values are: "
            f"'{prefix_field.value}', "
            f"'{suffix_field.value}', "
            f"'{prefix_suffix_field.value}', "
            f"'{color_field.value}'."
        )

    page.add(
        ft.SafeArea(
            content=ft.Column(
                controls=[
                    prefix_field := ft.TextField(
                        key="prefix_field",
                        label="With prefix",
                        prefix="https://",
                    ),
                    suffix_field := ft.TextField(
                        key="suffix_field",
                        label="With suffix",
                        suffix=".com",
                    ),
                    prefix_suffix_field := ft.TextField(
                        key="prefix_suffix_field",
                        label="With prefix and suffix",
                        prefix="https://",
                        suffix=".com",
                        enable_interactive_selection=True,
                    ),
                    color_field := ft.TextField(
                        key="color_field",
                        label="My favorite color",
                        icon=ft.Icons.FORMAT_SIZE,
                        hint_text="Type your favorite color",
                        helper="You can type only one color",
                        counter="{value_length}/{max_length} chars used",
                        prefix_icon=ft.Icons.COLOR_LENS,
                        suffix="...is your color",
                        max_length=20,
                    ),
                    ft.Button(
                        key="submit_button",
                        content="Submit",
                        on_click=handle_button_click,
                    ),
                    message := ft.Text(),
                ],
            ),
        ),
    )


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

Styled TextField

play_arrowTry Online

import flet as ft


async def main(page: ft.Page):
    page.padding = 50

    tf = ft.TextField(
        key="styled_textfield",
        text_size=30,
        cursor_color=ft.Colors.RED,
        selection_color=ft.Colors.YELLOW,
        color=ft.Colors.PINK,
        bgcolor=ft.Colors.BLACK_26,
        filled=True,
        focused_color=ft.Colors.GREEN,
        focused_bgcolor=ft.Colors.CYAN_200,
        border={
            ft.ControlState.DEFAULT: ft.OutlineInputBorder(
                border_radius=30,
                side=ft.BorderSide(color=ft.Colors.GREEN_800),
            ),
            ft.ControlState.FOCUSED: ft.OutlineInputBorder(
                border_radius=30,
                side=ft.BorderSide(width=2, color=ft.Colors.GREEN_ACCENT_400),
            ),
        },
        max_length=20,
        capitalization=ft.TextCapitalization.CHARACTERS,
    )

    page.add(
        ft.SafeArea(
            content=tf,
        )
    )


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

Custom label, hint, helper, and counter texts and styles

play_arrowTry Online

import flet as ft


def main(page: ft.Page):
    page.theme_mode = ft.ThemeMode.LIGHT

    def handle_field_change(e: ft.Event[ft.TextField]):
        message.value = e.control.value

    page.add(
        ft.SafeArea(
            content=ft.Column(
                controls=[
                    ft.TextField(
                        key="label_hint_helper_counter_textfield",
                        on_change=handle_field_change,
                        text_style=ft.TextStyle(
                            size=15,
                            italic=True,
                            color=ft.Colors.DEEP_ORANGE_600,
                            bgcolor=ft.Colors.LIME_ACCENT_200,
                        ),
                        label="Label",
                        label_style=ft.TextStyle(
                            size=17,
                            weight=ft.FontWeight.BOLD,
                            italic=True,
                            color=ft.Colors.BLUE,
                            bgcolor=ft.Colors.RED_700,
                        ),
                        hint_text="Hint",
                        hint_style=ft.TextStyle(
                            size=15,
                            weight=ft.FontWeight.BOLD,
                            italic=True,
                            color=ft.Colors.PINK_ACCENT,
                            bgcolor=ft.Colors.BROWN_400,
                        ),
                        helper="Helper",
                        helper_style=ft.TextStyle(
                            size=14,
                            weight=ft.FontWeight.BOLD,
                            color=ft.Colors.DEEP_PURPLE,
                            bgcolor=ft.Colors.BLUE_50,
                        ),
                        counter="Counter",
                        counter_style=ft.TextStyle(
                            size=14,
                            italic=True,
                            color=ft.Colors.YELLOW,
                            bgcolor=ft.Colors.GREEN_500,
                        ),
                    ),
                    message := ft.Text(),
                ],
            ),
        ),
    )


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

Properties

buildalways_call_on_tapclass-attributeinstance-attribute

always_call_on_tap: bool = False

Whether on_click should be called for every tap.

By default, only the first tap in a tap sequence triggers on_click. When enabled, consecutive taps trigger it as well.

buildanimate_cursor_opacityclass-attributeinstance-attribute

animate_cursor_opacity: bool | None = None

Whether the text cursor animates between transparent and opaque during each blink.

If not set, the default follows the platform behavior used by Flet.

buildautocorrectclass-attributeinstance-attribute

autocorrect: bool = True

Whether to enable autocorrection.

buildautofill_hintsclass-attributeinstance-attribute

autofill_hints: AutofillHint | list[AutofillHint] | None = (
    None
)

Helps the autofill service identify the type of this text input.

More information here.

buildautofocusclass-attributeinstance-attribute

autofocus: bool = False

True if the control will be selected as the initial focus. If there is more than one control on a page with autofocus set, then the first one added to the page will get focus.

buildcan_request_focusclass-attributeinstance-attribute

can_request_focus: bool = True

Whether this field can request focus.

If set to False, the field does not request focus when tapped or when its context menu is shown, and it cannot be reached with keyboard focus traversal.

buildcan_reveal_passwordclass-attributeinstance-attribute

can_reveal_password: bool = False

Displays a toggle icon button that allows revealing the entered password. Is shown if both password and can_reveal_password are True.

The icon is displayed in the same location as FormFieldControl.suffix and in case both can_reveal_password/password and suffix are provided, then the FormFieldControl.suffix won't be shown.

buildcapitalizationclass-attributeinstance-attribute

capitalization: TextCapitalization | None = None

Enables automatic on-the-fly capitalization of entered text.

Defaults to TextCapitalization.NONE.

buildclip_behaviorclass-attributeinstance-attribute

clip_behavior: ClipBehavior = ClipBehavior.HARD_EDGE

How the field's contents should be clipped.

See ClipBehavior for the available clipping modes.

buildcursor_colorclass-attributeinstance-attribute

cursor_color: ColorValue | None = None

The color of TextField cursor.

buildcursor_error_colorclass-attributeinstance-attribute

cursor_error_color: ColorValue | None = None

The color of the text cursor while the field is showing an error.

If not set, the cursor color falls back to the error text style and then to the theme's error color.

buildcursor_heightclass-attributeinstance-attribute

cursor_height: Number | None = None

Sets cursor height.

buildcursor_radiusclass-attributeinstance-attribute

cursor_radius: Number | None = None

Sets cursor radius.

buildcursor_widthclass-attributeinstance-attribute

cursor_width: Number = 2.0

Sets cursor width.

buildenable_ime_personalized_learningclass-attributeinstance-attribute

enable_ime_personalized_learning: bool = True

Whether the input method is allowed to learn from what the user types.

This affects Android only and controls personalized data such as typing history and user dictionary entries.

buildenable_interactive_selectionclass-attributeinstance-attribute

enable_interactive_selection: bool = True

Whether interactive text selection is enabled.

When enabled, users can move the caret, select text, and use the cut/copy/paste menu. When disabled, selection cannot be adjusted interactively and editing shortcuts for cut/copy/paste are suppressed.

buildenable_stylus_handwritingclass-attributeinstance-attribute

enable_stylus_handwriting: bool = True

Whether this field supports stylus handwriting input.

On supported devices, the user can write directly on top of the field with a stylus instead of typing from the keyboard.

buildenable_suggestionsclass-attributeinstance-attribute

enable_suggestions: bool = True

Whether to show input suggestions as the user types.

This flag only affects Android. On iOS, suggestions are tied directly to autocorrect, so that suggestions are only shown when autocorrect is True. On Android autocorrection and suggestion are controlled separately.

buildignore_pointersclass-attributeinstance-attribute

ignore_pointers: bool = False

Whether this field ignores pointer events.

buildignore_up_down_keysclass-attributeinstance-attribute

ignore_up_down_keys: bool = False

Whether to intercept Arrow-Up and Arrow-Down when this field has focus.

When set to True, pressing those keys does not move the caret to the beginning or end of the text respectively.

buildinput_filterclass-attributeinstance-attribute

input_filter: InputFilter | None = None

Provides as-you-type filtering/validation.

Similar to the on_change callback, the input filters are not applied when the content of the field is changed programmatically.

buildkeyboard_brightnessclass-attributeinstance-attribute

keyboard_brightness: Brightness | None = None

The brightness to use for the onscreen keyboard.

This setting is honored on iOS only.

buildkeyboard_typeclass-attributeinstance-attribute

keyboard_type: KeyboardType = KeyboardType.TEXT

The type of keyboard to use for editing the text.

buildmax_lengthclass-attributeinstance-attribute

max_length: int | None = None

Limits a maximum number of characters that can be entered into TextField.

Raises:

• ValueError - If it is not strictly greater than 0 or equal to -1.

buildmax_linesclass-attributeinstance-attribute

max_lines: int | None = None

The maximum number of lines to show at one time, wrapping if necessary.

This affects the height of the field itself and does not limit the number of lines that can be entered into the field.

If this is 1 (the default), the text will not wrap, but will scroll horizontally instead.

Raises:

• ValueError - If it is not strictly greater than 0.
• ValueError - If it is not greater than or equal to min_lines when both are set.

buildmin_linesclass-attributeinstance-attribute

min_lines: int | None = None

The minimum number of lines to occupy when the content spans fewer lines.

This affects the height of the field itself and does not limit the number of lines that can be entered into the field.

Defaults to 1.

Raises:

• ValueError - If it is not strictly greater than 0.
• ValueError - If it is not less than or equal to max_lines when both are set.

buildmouse_cursorclass-attributeinstance-attribute

mouse_cursor: MouseCursor | None = None

The mouse pointer to show while hovering over the field.

If not set, the standard text cursor is used.

buildmultilineclass-attributeinstance-attribute

multiline: bool = False

Whether this field can contain multiple lines of text.

buildobscuring_characterclass-attributeinstance-attribute

obscuring_character: str = '•'

The single character used to mask the text when password is True.

buildpasswordclass-attributeinstance-attribute

password: bool = False

Whether to hide the text being edited.

buildread_onlyclass-attributeinstance-attribute

read_only: bool = False

Whether the text can be changed.

When this is set to True, the text cannot be modified by any shortcut or keyboard operation. The text is still selectable.

buildscroll_paddingclass-attributeinstance-attribute

scroll_padding: PaddingValue = 20

Padding to keep around the field when a surrounding scrollable scrolls it into view.

When the field receives focus and is partly hidden, for example by the onscreen keyboard, this padding helps keep space between the field and the edges of the surrounding scrollable after scrolling.

buildselectionclass-attributeinstance-attribute

selection: TextSelection | None = None

Represents the current text selection or caret position in the field.

When the user selects text, this property is updated to reflect the selected range. If no text is selected, it contains an empty range indicating the caret position.

Setting this property visually updates the field's selection to match the given value, and hence leads to the on_selection_change event being triggered. To ensure the selection is visible and the event is fired, the text field must be focused. Call FormFieldControl.focus on the field before setting this property.

buildselection_colorclass-attributeinstance-attribute

selection_color: ColorValue | None = None

The color of TextField selection.

buildshift_enterclass-attributeinstance-attribute

shift_enter: bool = False

Changes the behavior of Enter button in multiline textfield to be chat-like, i.e. new line can be added with Shift+Enter and pressing just Enter fires on_submit event.

buildshow_cursorclass-attributeinstance-attribute

show_cursor: bool = True

Whether the field's cursor is to be shown.

buildsmart_dashes_typeclass-attributeinstance-attribute

smart_dashes_type: bool = True

Whether to allow the platform to automatically format dashes.

This flag only affects iOS versions 11 and above. As an example of what this does, two consecutive hyphen characters will be automatically replaced with one en dash, and three consecutive hyphens will become one em dash.

buildsmart_quotes_typeclass-attributeinstance-attribute

smart_quotes_type: bool = True

Whether to allow the platform to automatically format quotes.

This flag only affects iOS. As an example of what this does, a standard vertical double quote character will be automatically replaced by a left or right double quote depending on its position in a word.

buildstrut_styleclass-attributeinstance-attribute

strut_style: StrutStyle | None = None

The StrutStyle used for vertical text layout.

Strut style establishes a predictable minimum line height, which is useful when entered text may vary in font metrics or script.

buildtext_alignclass-attributeinstance-attribute

text_align: TextAlign | None = None

How the text should be aligned horizontally.

Defaults to TextAlign.LEFT.

buildvalueclass-attributeinstance-attribute

value: str = ''

Current value of this text field.

Events

bolton_blurclass-attributeinstance-attribute

on_blur: ControlEventHandler[TextField] | None = None

Called when the control has lost focus.

bolton_changeclass-attributeinstance-attribute

on_change: ControlEventHandler[TextField] | None = None

Called when the typed input for the TextField has changed.

bolton_clickclass-attributeinstance-attribute

on_click: ControlEventHandler[TextField] | None = None

Called when the field is tapped.

If always_call_on_tap is True, this event is also triggered for consecutive taps.

bolton_focusclass-attributeinstance-attribute

on_focus: ControlEventHandler[TextField] | None = None

Called when the control has received focus.

bolton_selection_changeclass-attributeinstance-attribute

on_selection_change: (
    EventHandler[TextSelectionChangeEvent[TextField]] | None
) = None

Called when the text selection or caret position changes.

This can be triggered either by user interaction (selecting text or moving the caret) or programmatically (through the selection property).

bolton_submitclass-attributeinstance-attribute

on_submit: ControlEventHandler[TextField] | None = None

Called when user presses ENTER while focus is on TextField.

bolton_tap_outsideclass-attributeinstance-attribute

on_tap_outside: ControlEventHandler[TextField] | None = None

Called when a pointer-down event occurs outside the field while it is focused.

Use this to react when the user taps away from the field.

Note

This callback is a notification only and does not include the pointer event details.