import { DropdownOption } from '@mezzanine-ui/core/dropdown/dropdown';
import { Dispatch, SetStateAction } from 'react';
/**
 * Provides a keyboard navigation handler for dropdown lists, encapsulating Arrow keys, Enter, and Escape behaviors.
 * Keeps logic centralized in DropdownItem for easy reuse.
 */
export declare function createDropdownKeydownHandler(params: {
    activeIndex: number | null;
    onEnterSelect?: (option: DropdownOption) => void;
    onEscape?: () => void;
    open: boolean;
    options: DropdownOption[];
    setActiveIndex: Dispatch<SetStateAction<number | null>>;
    /**
     * Optional setter for keyboard-only active index.
     * When provided, it is updated alongside `setActiveIndex` on arrow key navigation,
     * and cleared on Escape / directional keys that exit the list.
     */
    setKeyboardActiveIndex?: Dispatch<SetStateAction<number | null>>;
    setListboxHasVisualFocus: (focus: boolean) => void;
    setOpen: (open: boolean) => void;
}): (e: React.KeyboardEvent<HTMLInputElement>) => void;