import { LitElement } from 'lit';
import { Placement } from '@floating-ui/dom';
import type ArcMenu from '../menu/ArcMenu.js';
/**
 * @slot default - The dropdown content.
 * @slot trigger - The dropdown trigger, usually an `<arc-button>` element.
 *
 * @event arc-show - Emitted when the dropdown opens.
 * @event arc-after-show - Emitted after the dropdown opens and all animations are complete.
 * @event arc-hide - Emitted when the dropdown closes.
 * @event arc-after-hide - Emitted after the dropdown closes and all animations are complete.
 *
 * @ssr - True
 */
export default class ArcDropdown extends LitElement {
    /** @internal */
    static tag: string;
    static styles: import("lit").CSSResult[];
    /** @internal */
    trigger: HTMLElement;
    /** @internal */
    triggerSlot: HTMLSlotElement;
    /** @internal */
    positioner: HTMLElement;
    /** @internal */
    panel: HTMLElement;
    /** @internal */
    private _positionerCleanup;
    /** The preferred placement of the dropdown panel. */
    placement: Placement;
    /** The dropdown will close when the user interacts outside of this element (e.g. clicking). */
    containingElement?: HTMLElement;
    /** The distance in pixels from which to offset the panel away from its trigger. */
    distance: number;
    /** The distance in pixels from which to offset the panel along its trigger. */
    skidding: number;
    /** Indicates whether the dropdown is open. This can be used instead of the show/hide methods. */
    open: boolean;
    /** Disables the dropdown so the panel will not open. */
    disabled: boolean;
    /** Enable this option to prevent the panel from being clipped when the component is placed inside a container with overflow: auto|hidden|scroll. */
    hoist: boolean;
    handleOpenChange(): Promise<void>;
    handlePopoverOptionsChange(): void;
    handleDisabledChange(): void;
    connectedCallback(): void;
    firstUpdated(): Promise<void>;
    disconnectedCallback(): void;
    private startPositioner;
    private updatePositioner;
    private stopPositioner;
    private _updateAccessibleTrigger;
    addOpenListeners(): void;
    removeOpenListeners(): void;
    show(): Promise<void> | undefined;
    hide(): Promise<void> | undefined;
    getMenu(): ArcMenu;
    focusOnTrigger(): void;
    handleDocumentKeyDown(event: KeyboardEvent): void;
    handleDocumentMouseDown(event: MouseEvent): void;
    handleTriggerKeyDown(event: KeyboardEvent): void;
    handleTriggerKeyUp(event: KeyboardEvent): void;
    handleTriggerClick(): void;
    handlePanelSelect(event: CustomEvent): void;
    protected render(): import("lit-html").TemplateResult<1>;
}
declare global {
    interface HTMLElementTagNameMap {
        'arc-dropdown': ArcDropdown;
    }
}