import * as echarts from 'echarts';
import { UseEChartOptions } from './types';
/**
 * @description 计算图表的 px，主要用于适配 grid 配置
 * @param size
 * @param defaultWidth
 */
export declare const fitChartSize: (size: number, defaultWidth?: number) => number;
export declare function useEChart(): {
    chart: null;
    chartRef: import("vue").Ref<null>;
    init: () => echarts.ECharts | null;
    setOption: (option: UseEChartOptions) => echarts.ECharts | null;
    autoResize: (eventId?: string, delay?: number) => () => void;
    autoResizeHandler: () => void;
};