设置：
基本的反应应用程序使用 react-map-gl 来显示一个带有 deck.gl ScatterplotLayer 的地图以可视化数据
目标：
1) 将地图上的点显示为给定半径和颜色的圆。
2）当用户点击一个圆圈时，工具提示/弹出窗口应该显示更多关于它的数据（包含在提供的数据中），直到用户点击离开（基本上与此图相同，但点击而不是悬停，http：/ /uber.github.io/deck.gl/#/documentation/layer-catalog/scatterplot-layer。仅供参考，我查看了代码，悬停逻辑已被删除，我假设为简单起见）。
问题：
我已经完成了第 1 点，但我无法让第 2 点开始工作。我所能证明的最远的数据是登录到控制台。
要注意：
我没有嫁给 react-tooltip - 如果有更好的方法，我不介意完全删除它。我只需要保留mapbox和deck.gl。
资料：https ://gist.github.com/NikkiChristofi/bf79ca37028b29b50cffb215360db999
甲板gl-overlay.js
import React, {Component} from 'react';
import ReactTooltip from 'react-tooltip';
import DeckGL, {ScatterplotLayer} from 'deck.gl';
export default class DeckGLOverlay extends Component {
static get defaultViewport() {
return {
longitude: 0,
latitude: 0,
zoom: 2,
maxZoom: 16,
pitch: 0,
bearing: 0
};
}
# in this method I want to update the variable tooltipText with
# whatever object data has been clicked.
# The console log successfully logs the right data (i.e. the third
# element in the array), but the tooltip doesn't even show
onClickHandler = (info) => {
let dataToShow = info ? info.object[2] : "not found";
this.tooltipText = dataToShow;
console.log(dataToShow);
}
render() {
const {viewport, lowPerformerColor, highPerformerColor, data, radius, smallRadius, largeRadius} = this.props;
if (!data) {
return null;
}
const layer = new ScatterplotLayer({
id: 'scatter-plot',
data,
radiusScale: radius,
radiusMinPixels: 0.25,
getPosition: d => [d[1], d[0], 0],
getColor: d => d[2] > 50 ? lowPerformerColor : highPerformerColor,
getRadius: d => d[2] < 25 || d[2] > 75 ? smallRadius : largeRadius,
updateTriggers: {
getColor: [lowPerformerColor, highPerformerColor]
},
pickable: true,
onClick: info => this.onClickHandler(info),
opacity: 0.3
});
return (
<DeckGL {...viewport} layers={ [layer] } data-tip={this.tooltipText}>
<ReactTooltip />
</DeckGL>
);
}
}
应用程序.js
import React, {Component} from 'react';
import {render} from 'react-dom';
import MapGL from 'react-map-gl';
import DeckGLOverlay from './deckgl-overlay.js';
import {json as requestJson} from 'd3-request';
const MAPBOX_TOKEN = process.env.MAPBOX_TOKEN; // eslint-disable-line
const lowPerformerColor = [204, 0, 0];
const highPerformerColor = [0, 255, 0];
const smallRadius = 500;
const largeRadius = 1000;
const DATA_URL = 'https://gist.github.com/NikkiChristofi/bf79ca37028b29b50cffb215360db999';
export default class App extends Component {
constructor(props) {
super(props);
this.state = {
viewport: {
...DeckGLOverlay.defaultViewport,
width: 500,
height: 500
},
data: null
};
requestJson(DATA_URL, (error, response) => {
if (!error) {
console.log(response);
this.setState({data: response});
}
else{
console.log(error);
}
});
}
componentDidMount() {
window.addEventListener('resize', this._resize.bind(this));
this._resize();
}
_resize() {
this._onViewportChange({
width: window.innerWidth,
height: window.innerHeight
});
}
_onViewportChange(viewport) {
this.setState({
viewport: {...this.state.viewport, ...viewport}
});
}
render() {
const {viewport, data} = this.state;
return (
<MapGL
{...viewport}
onViewportChange={this._onViewportChange.bind(this)}
mapboxApiAccessToken={MAPBOX_TOKEN}
mapStyle='mapbox://styles/mapbox/dark-v9'>
<DeckGLOverlay viewport={viewport}
data={data}
lowPerformerColor={lowPerformerColor}
highPerformerColor={highPerformerColor}
smallRadius={smallRadius}
largeRadius={largeRadius}
radius={300}
/>
</MapGL>
);
}
}