Struct LoadingIndicator 

pub struct LoadingIndicator;

A standalone loading spinner widget.

Renders a braille spinner animation centered in its area. When ctx.skip_animations is true, renders static “Loading…” text instead, which is safe for snapshot tests.

Default CSS

LoadingIndicator { width: 100%; height: 100%; min-height: 1; }

Example

let layout = Vertical::with_children(vec![
    Box::new(LoadingIndicator::new()),
]);

Implementations

impl LoadingIndicator

pub fn new() -> Self

Create a new LoadingIndicator.

Trait Implementations

impl Default for LoadingIndicator

fn default() -> Self

Returns the “default value” for a type.

impl Widget for LoadingIndicator

fn widget_type_name(&self) -> &'static str

The CSS type selector name for this widget (e.g., "Button", "Input").

fn default_css() -> &'static str

where Self: Sized,

Built-in default CSS for this widget type (static version).

fn render(&self, ctx: &AppContext, area: Rect, buf: &mut Buffer)

Paint this widget’s content into the terminal buffer.

fn compose(&self) -> Vec<Box<dyn Widget>>

Declare child widgets. Called once at mount time to build the widget tree.

fn on_mount(&self, _id: WidgetId)

Called when this widget is inserted into the widget tree.

fn on_unmount(&self, _id: WidgetId)

Called when this widget is removed from the widget tree.

fn can_focus(&self) -> bool

Whether this widget participates in Tab-based focus cycling.

fn is_modal(&self) -> bool

Whether this screen blocks all keyboard and mouse input to screens beneath it.

fn classes(&self) -> &[&str]

CSS class names applied to this widget instance (e.g., &["primary", "active"]).

fn id(&self) -> Option<&str>

Element ID for this widget instance (used for #id CSS selectors).

fn widget_default_css(&self) -> &'static str

Instance-callable version of default_css(). Override this alongside default_css() to return the same value — this version is callable on dyn Widget and used by the framework to collect default styles at mount time.

fn on_event(&self, _event: &dyn Any, _ctx: &AppContext) -> EventPropagation

Handle a dispatched event/message. Downcast to concrete types to handle.

fn key_bindings(&self) -> &[KeyBinding]

Declare key bindings for this widget.

fn on_action(&self, _action: &str, _ctx: &AppContext)

Handle a key binding action. Called when a key matching a binding is pressed.

fn border_color_override(&self) -> Option<(u8, u8, u8)>

Override the border color for this widget based on internal state.

fn is_overlay(&self) -> bool

Whether this widget is a transparent overlay (context menu, tooltip, etc.). Overlay widgets skip paint_chrome (no background fill, no border from CSS) and paint their own chrome in render(). This prevents overlays from erasing the underlying screen content.

fn context_menu_items(&self) -> Vec<ContextMenuItem>

Return context menu items for right-click. Empty vec = no context menu. Override to provide widget-specific menu items.

fn click_action(&self) -> Option<&str>

Return the action to trigger on mouse click, if any.

fn has_text_selection(&self) -> bool

Whether this widget currently has selected text.