import { RefObject } from 'react';
export interface OverlayCloseEvent {
    nativeEvent: KeyboardEvent | MouseEvent;
    source: 'esc' | 'click';
}
export declare type OnClose = (event: OverlayCloseEvent) => void;
export declare type CloseStrategy = 'pressdown' | 'pressup';
export interface VirtualElement {
    getBoundingClientRect: () => DOMRect;
    contextElement?: Element;
}
export declare type RefHTMLElement = {
    readonly current: VirtualElement | HTMLElement | null;
};
export interface OverlayOptions {
    onClose?: OnClose;
    refs: RefHTMLElement[];
    closeStrategy: CloseStrategy;
}
export interface UseOverlayOptions {
    /**
     * Layer visibility
     */
    visible?: boolean;
    /**
     * Handler that will be called on outside click/escape press
     */
    onClose?: OnClose;
    /**
     * DOM-nodes refs to exclude from click tracking
     */
    essentialRefs: RefObject<HTMLElement | VirtualElement>[];
}