export declare const MIN_ZOOM = 0.5;
export declare const MAX_ZOOM = 5;
export declare const ZOOM_STEP = 0.25;
export interface ZoomPanResult {
    zoom: number;
    panX: number;
    panY: number;
    canZoomIn: boolean;
    canZoomOut: boolean;
    isZoomed: boolean;
    zoomIn: () => void;
    zoomOut: () => void;
    resetZoom: () => void;
    /** Translate by (dx, dy) screen pixels. */
    pan: (dx: number, dy: number) => void;
    /**
     * Zoom by a multiplicative scale factor, anchored at a focal point.
     * focalX/focalY are in px relative to the container centre.
     */
    zoomByScaleAtPoint: (scaleFactor: number, focalX: number, focalY: number) => void;
    /**
     * Zoom by an additive step delta, anchored at a focal point.
     * focalX/focalY are in px relative to the container centre.
     */
    zoomByDeltaAtPoint: (delta: number, focalX: number, focalY: number) => void;
    /**
     * Simultaneously pan by (dx, dy) and zoom by a multiplicative scale factor,
     * anchored at a focal point. Used for 2-finger gestures where the midpoint
     * may translate while the fingers pinch.
     */
    panAndZoomAtPoint: (dx: number, dy: number, scaleFactor: number, focalX: number, focalY: number) => void;
}
export declare function useZoomPan(): ZoomPanResult;