import type { RefObject } from 'react';
import type { Node, NodeId } from '../types';
export type AddNodeAtCenterInput = {
    id: NodeId;
    width: number;
    height: number;
    data?: Partial<Node>;
};
export type AddAtCenterOptions = {
    stepPx?: number;
    modulo?: number;
};
/**
 * React helpers bound to a specific Canvas root element.
 * Provides addNodeAtCenter() that places nodes at the visual center regardless of zoom,
 * with a small diagonal offset for subsequent nodes.
 */
export declare function useCanvasHelpers(rootRef: RefObject<HTMLElement>, options?: AddAtCenterOptions): {
    addNodeAtCenter: (input: AddNodeAtCenterInput) => void;
    resetCenterOffset: () => void;
};