mirror of https://gitee.com/antv-l7/antv-l7
115 lines
2.7 KiB
TypeScript
115 lines
2.7 KiB
TypeScript
import { LineLayer, PointLayer, PolygonLayer, Popup, Scene } from '@antv/l7';
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import { GaodeMap, Mapbox } from '@antv/l7-maps';
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import { lnglatDistance } from '@antv/l7-utils';
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// import turfCircle from '@turf/circle';
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import * as React from 'react';
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const createGeoJSONCircle = (
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center: [number, number],
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radiusInKm: number,
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points: number = 64,
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) => {
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const options = { steps: 64 };
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// const circle = turfCircle(center, radiusInKm, options);
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return {
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type: 'geojson',
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data: {
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type: 'FeatureCollection',
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features: [],
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},
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};
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};
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export default class MultiPolygon extends React.Component {
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private gui: dat.GUI;
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private $stats: Node;
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private scene: Scene;
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public componentWillUnmount() {
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this.scene.destroy();
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}
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public async componentDidMount() {
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const scene = new Scene({
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id: 'map',
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map: new Mapbox({
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pitch: 0,
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style: 'normal',
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center: [121.775374, 31.31067],
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zoom: 15,
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}),
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});
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this.scene = scene;
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scene.on('loaded', () => {
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let startPoint = {};
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const circleLayer = new PolygonLayer()
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.source({
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type: 'FeatureCollection',
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features: [],
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})
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.color('#fbb03b')
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.shape('fill')
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.style({
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opacity: 0.6,
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});
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scene.addLayer(circleLayer);
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scene.on('dragstart', (e: any) => {
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// @ts-ignore
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scene.map.drag.disable();
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startPoint = e.lngLat;
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const layer = new PointLayer()
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.source([startPoint], {
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parser: {
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type: 'json',
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x: 'lng',
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y: 'lat',
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},
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})
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.shape('circle')
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.color('#fbb03b')
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.size(5)
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.style({
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stroke: '#fff',
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strokeWidth: 2,
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});
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scene.addLayer(layer);
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});
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scene.on('drag', (e: any) => {
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// @ts-ignore
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const start = [startPoint.lng, startPoint.lat];
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const dis = lnglatDistance(
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// @ts-ignore
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start,
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[e.lngLat.lng, e.lngLat.lat],
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);
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const circleData = createGeoJSONCircle(
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start as [number, number],
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dis / 1000,
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);
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circleLayer.setData(circleData.data);
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const popup = new Popup().setText(`${dis}`).setLnglat(e.lngLat);
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scene.addPopup(popup);
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});
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scene.on('dragend', (e: any) => {
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// @ts-ignore
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scene.map.dragdrag.enable();
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});
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});
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}
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public render() {
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return (
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<div
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id="map"
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style={{
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position: 'absolute',
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top: 0,
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left: 0,
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right: 0,
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bottom: 0,
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}}
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/>
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);
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}
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}
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