import React, { useRef } from 'react';
import { Line } from '@ant-design/charts';

const Page: React.FC = () => {
  const data = [
    { year: '1991', value: 3 },
    { year: '1992', value: 4 },
    { year: '1993', value: 3.5 },
    { year: '1994', value: 5 },
    { year: '1995', value: 4.9 },
    { year: '1996', value: 6 },
    { year: '1997', value: 7 },
    { year: '1998', value: 9 },
    { year: '1999', value: 13 },
  ];

  const config = {
    data,
    width: 800,
    height: 400,
    autoFit: false,
    xField: 'year',
    yField: 'value',
    point: {
      size: 5,
      shape: 'diamond',
    },
    label: {
      style: {
        fill: '#aaa',
      },
    },
  };

  const ref = useRef();

  // 导出图片
  const downloadImage = () => {
    ref.current?.downloadImage();
  };

  // 获取图表 base64 数据
  const toDataURL = () => {
    console.log(ref.current?.toDataURL());
  };

  return (
    <div>
      <button type="button" onClick={downloadImage} style={{ marginRight: 24 }}>
        导出图片
      </button>
      <button type="button" onClick={toDataURL}>
        获取图表信息
      </button>
      <Line {...config} chartRef={ref} />
    </div>
  );
};
export default Page;