import { RefObject } from 'react';
export interface GesturePoint {
    x: number;
    y: number;
}
export interface GestureHandlers<D> {
    /** Every press that starts a gesture, before anything else: where a running settle is finished. */
    onPress?: () => void;
    /** Whether a horizontal swipe may page right now. */
    canSwipe?: () => boolean;
    onSwipeMove?: (dx: number) => void;
    /** Also called with `(0, 0)` when the browser takes the gesture over. */
    onSwipeEnd?: (dx: number, velocity: number) => void;
    /** What a press on `target` would pick up, or `null` where nothing can be dragged. */
    dragFrom?: (target: Element, point: GesturePoint) => D | null;
    onDragStart?: (drag: D, point: GesturePoint) => void;
    onDragMove?: (point: GesturePoint) => void;
    onDragEnd?: (point: GesturePoint) => void;
    onDragCancel?: () => void;
    onPinchStart?: (center: GesturePoint, distance: number) => void;
    onPinchMove?: (center: GesturePoint, distance: number) => void;
    onPinchEnd?: () => void;
    /** The element a drag scrolls near its edges, and the band of the viewport that counts as its inside. */
    autoScroll?: () => {
        element: HTMLElement;
        top: number;
        bottom: number;
    } | null;
}
/**
 * One owner for every pointer gesture inside `ref`, so a swipe, a long-press drag, a pinch and
 * the browser's own scrolling can never both act on the same touch.
 *
 * Mouse or touch rules are chosen per event from `pointerType`, not once from a media query,
 * which answers wrongly on a laptop with a touch screen.
 */
export declare function useGestures<D>(ref: RefObject<HTMLElement | null>, handlers: GestureHandlers<D>): void;