Struct Spinner 

pub struct Spinner;

An indeterminate loading indicator component.

Spinner displays an animated indicator to show ongoing activity. Unlike ProgressBar, it does not show specific progress - just that something is happening.

Animation

The spinner advances one frame each time it receives a Tick message. Your application should send Tick messages at regular intervals (typically every 80-100ms) to create smooth animation.

Styles

Several built-in styles are available:

• Dots: Braille dots (⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏) - default
• Line: Classic ASCII (|/-\)
• Circle: Quarter circles (◐◓◑◒)
• Bounce: Bouncing dot (⠁⠂⠄⠂)
• Custom: Your own character sequence

Example

use envision::component::{Spinner, SpinnerMessage, SpinnerState, Component};

let mut state = SpinnerState::with_label("Processing...");

// In your app's update function, forward timer ticks:
Spinner::update(&mut state, SpinnerMessage::Tick);

// Stop when done:
Spinner::update(&mut state, SpinnerMessage::Stop);

Trait Implementations

impl Component for Spinner

type State = SpinnerState

The component’s internal state type.

type Message = SpinnerMessage

Messages this component can receive.

type Output = ()

Messages this component can emit to its parent.

fn init() -> Self::State

Initialize the component state.

fn update(state: &mut Self::State, msg: Self::Message) -> Option<Self::Output>

Update component state based on a message.

fn view( state: &Self::State, frame: &mut Frame<'_>, area: Rect, theme: &Theme, _ctx: &ViewContext, )

Render the component to the given area.

fn traced_view( state: &Self::State, frame: &mut Frame<'_>, area: Rect, theme: &Theme, ctx: &ViewContext, )

Renders the component with optional tracing instrumentation.

fn handle_event(state: &Self::State, event: &Event) -> Option<Self::Message>

Maps an input event to a component message.

fn dispatch_event( state: &mut Self::State, event: &Event, ) -> Option<Self::Output>

Dispatches an event by mapping it to a message and updating state.

impl Disableable for Spinner

fn is_disabled(state: &Self::State) -> bool

Returns true if this component is currently disabled.

fn set_disabled(state: &mut Self::State, disabled: bool)

Sets the disabled state of this component.

fn disable(state: &mut Self::State)

Disables this component.

fn enable(state: &mut Self::State)

Enables this component.

fn view_with_disabled( state: &mut Self::State, frame: &mut Frame<'_>, area: Rect, theme: &Theme, disabled: bool, )

Renders the component with the disabled state temporarily overridden.