CurveLine 弧线组件

使用浏览器的矢量制图工具（如果可用）在地图上绘制弧线的地图叠加层，当前组件自动加载 CurveLine.min.js 包，加载完成将会有个 window.BMapLib 的全局对象。

import { CurveLine, useCurveLine } from '@uiw/react-baidu-map';
// 或者单独安装使用
import CurveLine, { useCurveLine } from '@uiw/react-baidu-map-curve-line';

基本用法

`jsx mdx:preview import React, { useState } from 'react'; import { Map, CurveLine, APILoader } from '@uiw/react-baidu-map';

const Example = () => { const [enableEditing, setEnableEditing] = useState(false); const [strokeOpacity, setStrokeOpacity] = useState(0.5); function curveLineRef(props) { if (props && props.curveLine) { console.log('curveLine:', props.curveLine, props.map, props.BMapLib); } } return ( <> <button onClick={() => setEnableEditing(!enableEditing)}>{enableEditing ? '取消编辑' : '编辑'}</button> <button onClick={() => setStrokeOpacity(0.7)}>透明度0.7</button> <button onClick={() => setStrokeOpacity(0.2)}>透明度0.2</button> <Map zoom={4} center="武汉" widget={['NavigationControl']} style={{ height: 350 }}> <CurveLine ref={curveLineRef} enableEditing={enableEditing} strokeOpacity={strokeOpacity} strokeWeight={3} strokeColor="blue" path={[ { lng: 116.432045, lat: 39.910683 }, { lng: 114.300404, lat: 30.63216 }, { lng: 121.491121, lat: 25.127053 }, ]} /> </Map> </> ); }

const Demo = () => ( <div style={{ width: '100%' }}> <APILoader akay="eYpCTECSntZmw0WyoQ7zFpCRR9cpgHFG"> <Example /> </APILoader> ); export default Demo;

### 使用 hooks

`curveLine`, `setCurveLine`, `path`, `setPath`, `BMapLib`

```jsx mdx:preview
import React from 'react';
import { useRef, useEffect, useState } from 'react';
import { Map, APILoader, Provider, useMap, useCurveLine } from '@uiw/react-baidu-map';

const Example = () => {
  const [enableEditing, setEnableEditing] = useState(false);
  const [strokeOpacity, setStrokeOpacity] = useState(0.9);
  const divElm = useRef(null);
  const { setContainer, map } = useMap({
    zoom: 8,
    enableScrollWheelZoom: true,
    widget: ['GeolocationControl', 'NavigationControl']
  });
  const { curveLine } = useCurveLine({ map,
    enableEditing, strokeOpacity,
    path: [
      { lng: 118.798544, lat: 32.076761 },
      { lng: 120.785452, lat: 30.759355 },
      { lng: 120.895835, lat: 31.974881 },
    ],
  });
  useCurveLine({ map,
    path: [
      { lng: 118.770948, lat: 30.9419 },
      { lng: 120.583081, lat: 31.313834 },
      { lng: 121.484549, lat: 31.226918 },
    ],
  });

  useEffect(() => {
    if (divElm.current) {
      setContainer(divElm.current);
    }
  });

  useEffect(() => {
    if (map && curveLine) {
      if (enableEditing) {
        curveLine.enableEditing();
      } else {
        curveLine.disableEditing();
      }
    }
  }, [enableEditing]);

  useEffect(() => {
    if (map && curveLine) {
      curveLine.setStrokeOpacity(strokeOpacity);
    }
  }, [strokeOpacity]);

  return (
    <>
      <button onClick={() => setEnableEditing(!enableEditing)}>{enableEditing ? '取消编辑' : '编辑'}</button>
      <button onClick={() => setStrokeOpacity(0.7)}>透明度0.7</button>
      <button onClick={() => setStrokeOpacity(0.2)}>透明度0.2</button>
      <div ref={divElm} style={{ height: 350 }} />
    </>
  )
}

const Demo = () => (
  <div style={{ width: '100%' }}>
    <APILoader akay="eYpCTECSntZmw0WyoQ7zFpCRR9cpgHFG">
      <Provider>
        <Example />
      </Provider>
    </APILoader>
  </div>
);
export default Demo;

Props

事件