import { RadiantElement } from '@ecopages/radiant';
import type { EventEmitter } from '@ecopages/radiant/tools/event-emitter';
export type RuiTreeProps = {
    label?: string;
    /** Selected tree item `data-value` / id. */
    value?: string;
};
export type RuiTreeChangeDetail = {
    value: string;
};
type RuiTreeBindings = {
    label: string;
};
/**
 * `<rui-tree>` — a hierarchical list of tree items.
 *
 * Implements a single-select APG Tree View with Arrow key navigation,
 * Home/End, parent navigation on ArrowLeft, and Enter/Space to select.
 * Expand/collapse is handled with ArrowRight/ArrowLeft (and `*` for siblings);
 * click or Enter on a parent also toggles expansion.
 *
 * @summary Single-select tree with roving-tabindex keyboard navigation.
 *
 * @see https://www.w3.org/WAI/ARIA/apg/patterns/treeview/
 *
 * @element rui-tree
 *
 * @attr {string} label - Accessible name for the tree.
 * @attr {string} value - Selected item's `data-value` / id. Default: `''`.
 *
 * @fires rui-change - Emitted with `{ value }` when a tree item is selected.
 *
 * @cssclass rui-tree - Root list (`role="tree"`).
 *
 * @remarks
 * Item-level classes (`rui-tree__item`, `rui-tree__node`) are authored by the
 * `RuiTree` view. Expand/collapse mutates `aria-expanded` and `hidden` on the
 * authored `role="group"` containers.
 */
export declare class RuiTree extends RadiantElement<RuiTreeBindings> {
    label: string;
    value: string;
    changeEvent: EventEmitter<RuiTreeChangeDetail>;
    private getVisibleItems;
    private getParentItem;
    /** Same-level treeitems as `item` (for `*` expand-siblings). */
    private getSiblingItems;
    private syncSelection;
    private syncExpanded;
    protected onConnected(): void;
    onValueUpdated(): void;
    private select;
    private setExpanded;
    onClick(event: Event): void;
    onKeydown(event: KeyboardEvent): void;
}
export {};