Struct TabBar 

pub struct TabBar { /* private fields */ }

A horizontal tab bar with an animated sliding underline under the selected tab. Interactive (mouse + touch) when .on_change is wired.

Fully customizable (D094): every color/size has a builder; unset colors resolve from the active theme (surface/on_surface/primary/outline), so the bar adapts to light/dark and custom themes out of the box. The underline slides between tabs with the theme’s animation curve by default.

Implementations

impl TabBar

pub fn new() -> Self

pub fn tab(self, t: Tab) -> Self

pub fn selected(self, i: usize) -> Self

pub fn height(self, h: f32) -> Self

pub fn font_size(self, s: f32) -> Self

pub fn background(self, c: Color) -> Self

Bar background — theme surface if unset.

pub fn active_color(self, c: Color) -> Self

Selected-tab label color — theme on_surface if unset.

pub fn inactive_color(self, c: Color) -> Self

Unselected-tab label color — a muted on_surface if unset.

pub fn indicator_color(self, c: Color) -> Self

Sliding-underline color — theme primary if unset.

pub fn border_color(self, c: Color) -> Self

Bottom-divider color — theme outline if unset.

pub fn animated(self, on: bool) -> Self

Turn the sliding-underline animation off (on by default).

pub fn on_change(self, f: impl Fn(usize) + Send + Sync + 'static) -> Self

Make the bar interactive: f(index) fires on tap of tab index.

pub fn scrollable(self, on: bool) -> Self

Size each tab to its natural label width instead of dividing the bar equally — for many/long tabs that need horizontal scrolling. Wrap the bar in a ScrollView (or use Tabs::scrollable, which does this for you) so overflow is actually reachable, not just clipped.

Trait Implementations

impl Default for TabBar

fn default() -> Self

Returns the “default value” for a type.

impl Widget for TabBar

fn layout(&self, ctx: &LayoutCtx<'_>) -> Size

Measure under ctx.constraints and return a size within them.

fn paint(&self, ctx: &mut PaintCtx<'_>)

Record draw commands for ctx.rect.

fn children(&self) -> Children<'_>

Declare this widget’s children. Drives every default below.

fn flex_factor(&self) -> f32

Flex weight inside Row/Column. Wrappers are transparent by default.

fn into_element(self) -> Element

where Self: Sized + 'static,

Wrap this widget in an Element so it can be returned from Component::build().