import * as d3 from "d3";
interface Times {
    x: number;
    time: string;
}
/**
 *
 * @param { Array } timeRange - 时间范围
 * @param { Number } width - 宽度
 * @param { Number } numCols - 列数
 * @param { Number } gridSize - 每列像素
 * @returns { Times[] | null }
 */
export declare function timeScaleGenerator(timeRange: [string, string], width: number, numCols: number, gridSize: number): {
    times: Times[];
    parseTime: (dateString: string) => Date | null;
    formatTime: (date: Date) => string;
    timeScale?: d3.ScaleTime<number, number, never>;
} | null;
export declare function filterMenuItemsByData(menuItems: any[], data: any[]): any[];
export declare function cutString(str: string, maxLength?: number): string;
export {};