import { FederatedMouseEvent } from './FederatedMouseEvent';
/**
 * A {@link FederatedEvent} for wheel events.
 * @memberof events
 */
export declare class FederatedWheelEvent extends FederatedMouseEvent implements WheelEvent {
    /**
     * The units of `deltaX`, `deltaY`, and `deltaZ`. This is one of `DOM_DELTA_LINE`,
     * `DOM_DELTA_PAGE`, `DOM_DELTA_PIXEL`.
     */
    deltaMode: number;
    /** Horizontal scroll amount */
    deltaX: number;
    /** Vertical scroll amount */
    deltaY: number;
    /** z-axis scroll amount. */
    deltaZ: number;
    /** Units specified in pixels. */
    static readonly DOM_DELTA_PIXEL = 0;
    /** Units specified in pixels. */
    readonly DOM_DELTA_PIXEL = 0;
    /** Units specified in lines. */
    static readonly DOM_DELTA_LINE = 1;
    /** Units specified in lines. */
    readonly DOM_DELTA_LINE = 1;
    /** Units specified in pages. */
    static readonly DOM_DELTA_PAGE = 2;
    /** Units specified in pages. */
    readonly DOM_DELTA_PAGE = 2;
}