/// <reference types="dygraphs" />
export default class CrossHairs {
    private direction;
    private graph?;
    private canvas_;
    constructor(opts: {
        direction?: string;
    });
    activate: (graph: Dygraph) => {
        select: (e: MouseEvent) => void;
        deselect: (e: MouseEvent) => void;
    };
    select: (e: MouseEvent) => void;
    deselect: (e: MouseEvent) => void;
    destroy: () => void;
}