import { type View } from "react-native";
/** One notch or trackpad swipe, normalized. */
export interface WheelGesture {
    /** Scroll travel in PIXELS, whatever unit the browser reported. Positive scrolls
     *  the page down, which reads as zooming out. */
    deltaY: number;
    /** The pointer's position within the bound node, in pixels from its top-left. */
    x: number;
    y: number;
    /** True for a trackpad pinch, which every browser reports as ctrl+wheel. */
    pinch: boolean;
}
/** Scroll travel in pixels, whatever unit `deltaMode` says the browser used. */
export declare function normalizeWheelDelta(delta: number, deltaMode: number): number;
/**
 * Wheel and trackpad-pinch zoom on the web: while `active`, a non-passive wheel listener
 * on the returned ref's node reports each gesture in pixels with the pointer's position,
 * and suppresses the page's scroll only when `onWheel` claims it. A no-op natively.
 */
export declare function useWheel(
/** Subscribe only while true (pass the chart's own `zoomable`). */
active: boolean, 
/** Return TRUE to claim the gesture; only then is the page's own scroll suppressed. */
onWheel: (gesture: WheelGesture) => boolean): import("react").RefObject<View | null>;
//# sourceMappingURL=use-wheel.d.ts.map