import { RadiantElement } from '@ecopages/radiant';
import type { EventEmitter } from '@ecopages/radiant/tools/event-emitter';
export type RuiMenubarProps = {
    label?: string;
};
export type RuiMenubarChangeDetail = {
    value: string;
};
type RuiMenubarBindings = {
    label: string;
};
/**
 * `<rui-menubar>` — a horizontal menubar of menus.
 *
 * Implements the APG Menubar pattern: top-level items use `role="menuitem"` with
 * `aria-haspopup` / `aria-expanded` when they own a nested `[role="menu"]`. Arrow
 * keys move across the bar; Enter/Space/ArrowDown open the popup; Escape closes it.
 *
 * Expected markup (also produced by the JSX view helper):
 * ```html
 * <div class="rui-menubar__root" data-ref="menubar-root">
 *   <button role="menuitem" aria-haspopup="true" aria-expanded="false">File</button>
 *   <div role="menu" hidden>
 *     <button role="menuitem" data-value="new">New</button>
 *   </div>
 * </div>
 * ```
 *
 * @see https://www.w3.org/WAI/ARIA/apg/patterns/menubar/
 * @element rui-menubar
 * @attr {string} label - Accessible name for the `role="menubar"` landmark.
 * @fires rui-change - Emitted when a menu item is activated; `detail.value` is the item's `data-value` or text.
 * @cssclass rui-menubar - Menubar bar (`role="menubar"`).
 */
export declare class RuiMenubar extends RadiantElement<RuiMenubarBindings> {
    label: string;
    changeEvent: EventEmitter<RuiMenubarChangeDetail>;
    private openRoot;
    private popoverController;
    private getTopItems;
    private getMenuFor;
    private getMenuItems;
    protected onConnected(): void;
    disconnectedCallback(): void;
    private getOpenMenuAnchor;
    private getOpenMenuSurface;
    private syncOpenMenuPosition;
    private closeOpenMenu;
    private openMenu;
    onDocumentPointerDown(event: PointerEvent): void;
    /**
     * @remarks When a menu is open, roving focus across the bar opens the newly focused menu (APG).
     */
    onTopKeydown(event: KeyboardEvent): void;
    onTopClick(event: Event): void;
    onMenuKeydown(event: KeyboardEvent): void;
    /**
     * @remarks Ignores top-level items — they are not direct children of `role="menu"` in this markup.
     */
    onMenuItemClick(event: Event): void;
    private activateItem;
}
export {};