import { PositionStrategy } from './position/position-strategy';
import { LayoutDirection } from '../rtl/dir';
/**
 * OverlayState is a bag of values for either the initial configuration or current state of an
 * overlay.
 */
export declare class OverlayState {
    /** Strategy with which to position the overlay. */
    positionStrategy: PositionStrategy;
    /** Whether the overlay has a backdrop. */
    hasBackdrop: boolean;
    /** Custom class to add to the backdrop **/
    backdropClass: string;
    /** The width of the overlay panel. If a number is provided, pixel units are assumed. **/
    width: number | string;
    /** The height of the overlay panel. If a number is provided, pixel units are assumed. **/
    height: number | string;
    /** The direction of the text in the overlay panel. */
    direction: LayoutDirection;
}