如何更改 React-Google-Maps 多边形的样式选项 onHover？答案

【问题标题】：How Can I Change a React-Google-Maps Polygon's Style Options onHover?如何更改 React-Google-Maps 多边形的样式选项 onHover？
【发布时间】：2019-04-15 21:10:58
【问题描述】：

我无法使用 onMouseOver/onMouseOut 事件显示/隐藏多边形。

到目前为止，我已经尝试通过 this 直接操作选项，并使用通过带有三元运算符的 props 传递的父状态作为选项值。

const Map = compose(
  withProps({
    googleMapURL:
      'https://maps.googleapis.com/maps/api/js?key=${APIKEY}&callback=initMap',
    loadingElement: <div style={{ height: `100%` }} />,
    containerElement: <div style={{ height: '100%' }} />,
    mapElement: <div style={{ height: `100%` }} />
  }),
  withScriptjs,
  withGoogleMap
)(props => {
  return (
    <GoogleMap
      center={{ lat: 40.726, lng: -74.006 }}
      defaultOptions={{
        mapTypeId: 'roadmap',
        zoom: 16,
        minZoom: 15.5,
        maxZoom: 18,
        streetViewControl: false,
        scaleControl: false,
        mapTypeControl: false,
        clickableIcons: false,
        panControl: false,
        zoomControl: true,
        rotateControl: false,
        scrollWheel: false,
        gestureHandling: 'greedy'
      }}
    >

        <Polygon
          path={[
            { lat: 40.7290705, lng: -74.0105223 },
            { lat: 40.727603, lng: -74.0106457 },
            { lat: 40.7262451, lng: -74.0108174 },
            { lat: 40.7258874, lng: -74.0108495 },
            { lat: 40.72481, lng: -74.0092724 },
            { lat: 40.7241352, lng: -74.0083496 },
            { lat: 40.7234522, lng: -74.0073894 },
            { lat: 40.7221187, lng: -74.0054582 },
            { lat: 40.7222569, lng: -74.0054582 },
            { lat: 40.7255256, lng: -74.0041064 },
            { lat: 40.727729, lng: -74.0032052 },
            { lat: 40.7283306, lng: -74.0032159 },
            { lat: 40.7285908, lng: -74.0057479 },
            { lat: 40.7288347, lng: -74.0082156 },
            { lat: 40.7290705, lng: -74.0105223 }
          ]}
          options={{
            strokeColor: '#369BF7',
            strokeOpacity: props.neighborhood.westVillage ? 1 : 0,
            fillOpacity: props.neighborhood.westVillage ? 1 : 0,
            strokeWeight: 1,
            fillColor: '#369BF7'
          }}
          onMouseOver={() => {
            console.log('westVillage');
            props.toggleNeighborhoodVisibility('westVillage');
          }}
          onMouseOut={() => {
            console.log('off');
            props.toggleNeighborhoodVisibility('westVillage');
          }}
        />
     </GoogleMap>
  );
});

class MapContainer extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      neighborhood: {
        soho: false,
        tribeca: false,
        hudsonSquare: false,
        westVillage: false
      }
    };
  }

  toggleNeighborhoodVisibility = section => {
    const { neighborhood } = this.state;
    neighborhood[section] = !neighborhood[section];
    this.setState({
      neighborhood
    });
  };

  render() {
    const { neighborhood } = this.state;
    return <Map neighborhood={neighborhood} toggleNeighborhoodVisibility={this.toggleNeighborhoodVisibility} />;
  }
}

【问题讨论】：

标签： reactjs google-maps next react-google-maps

【解决方案1】：

由于您的示例中使用了recompose，您可以考虑通过withHandlers() HoC 将其他参数传递给toggleNeighborhoodVisibility：

withHandlers({
    handleMouseEvent: props => event => {
      const polygon = props.polygonRef.current.state[POLYGON]; //polygon instance
      props.toggleNeighborhoodVisibility("westVillage", polygon);
    }
})

在哪里

<Polygon
    ref={props.polygonRef}
    //...
    onMouseOver={props.handleMouseEvent}
    onMouseOut={props.handleMouseEvent}
/>

解释：

polygonRef ref 用于访问 Polygon 组件

Here is a demo供您参考

【讨论】：