import type { TemplateResult, CSSResultArray, PropertyValues } from 'lit';
import { OverlayElement } from '../base/overlay-element';
import type { Placement, PositioningStrategy } from '../base/overlay-element';
export type { Placement, PositioningStrategy };
declare const PharosDropdownMenu_base: typeof OverlayElement;
/**
 * Pharos dropdown menu component.
 *
 * @tag pharos-dropdown-menu
 *
 * @slot - Contains the menu items.
 *
 * @fires pharos-dropdown-menu-select - Fires when an item is about to be selected - cancelable
 * @fires pharos-dropdown-menu-selected - Fires when an item has been selected
 * @fires pharos-dropdown-menu-opened - Fires when the dropdown menu is opened
 * @fires pharos-dropdown-menu-closed - Fires when the dropdown menu is closed
 *
 */
export declare class PharosDropdownMenu extends PharosDropdownMenu_base {
    private _focusTrapController;
    /**
     * Indicates if the dropdown should display a checkmark on the selected item.
     * @attr show-selected
     */
    showSelected: boolean;
    /**
     * Indicates if the menu width should equal its trigger's width.
     * @attr full-width
     */
    fullWidth: boolean;
    /**
     * Indicates the menu item is displayed on a dark background.
     * @attr is-on-background
     */
    isOnBackground: boolean;
    private _navMenu;
    private _menu;
    private _allMenuItems;
    private _activeMenuItems;
    private _targetWidth;
    private _triggers;
    private _currentTrigger;
    private _hasHover;
    private _moveFocusToLast;
    private _enterByKey;
    private _cleanup?;
    private _observeResizeTrigger;
    private _resizeObserver;
    constructor();
    static get styles(): CSSResultArray;
    removeAllTriggers(): void;
    openWithTrigger(trigger: HTMLElement): Promise<void>;
    protected firstUpdated(): void;
    protected update(changedProperties: PropertyValues): void;
    private _emitVisibilityChange;
    protected updated(changedProperties: PropertyValues): void;
    connectedCallback(): void;
    private _removeTriggerListeners;
    disconnectedCallback(): void;
    private _dropdownId;
    private _addTriggerListeners;
    private _addTriggerElement;
    private _setupTriggerElement;
    private _setupMenu;
    private _handleTriggerClick;
    private _handleTriggerKeydown;
    private _handleTriggerHover;
    private _handleKeydown;
    private _handleClick;
    private _setOpen;
    private _handleHover;
    private _focusContents;
    private _focusFirstItem;
    private _focusLastItem;
    private _returnTriggerFocus;
    private _handleMenuClick;
    private _handleItemClick;
    private _handleMenuKeydown;
    private _handleNavigation;
    private _setupResizeObserver;
    private _releaseObserver;
    private _setHoverListeners;
    private _openMenu;
    private _resetItemsState;
    private _hasItems;
    private _handleSlotChange;
    private _renderSlot;
    private _renderList;
    protected render(): TemplateResult;
}
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