import 'mapbox-gl/dist/mapbox-gl.css'; import React, { Component } from 'react'; import { connect } from 'react-redux'; import mapboxgl from 'mapbox-gl'; const calculateMapCenter = (state) => { if (state.devices.selectedId) { const position = state.positions.items[state.devices.selectedId] || null; if (position) { return [position.longitude, position.latitude]; } } return null; } const mapFeatureProperties = (state, position) => { const device = state.devices.items[position.deviceId] || null; return { name: device ? device.name : '' } } const mapStateToProps = state => ({ mapCenter: calculateMapCenter(state), data: { type: 'FeatureCollection', features: Object.values(state.positions.items).map(position => ({ type: 'Feature', geometry: { type: 'Point', coordinates: [position.longitude, position.latitude] }, properties: mapFeatureProperties(state, position) })) } }); class MainMap extends Component { componentDidMount() { const map = new mapboxgl.Map({ container: this.mapContainer, style: 'https://cdn.traccar.com/map/basic.json', center: [0, 0], zoom: 1 }); map.on('load', () => this.mapDidLoad(map)); } loadImage(key, url) { return new Promise(resolutionFunc => { const image = new Image(); image.onload = () => { const canvas = document.createElement('canvas'); canvas.width = image.width * window.devicePixelRatio; canvas.height = image.height * window.devicePixelRatio; canvas.style.width = `${image.width}px`; canvas.style.height = `${image.height}px`; const context = canvas.getContext('2d'); context.drawImage(image, 0, 0, canvas.width, canvas.height); this.map.addImage(key, context.getImageData(0, 0, canvas.width, canvas.height), { pixelRatio: window.devicePixelRatio }); resolutionFunc() } image.src = url; }); } mapDidLoad(map) { this.map = map; Promise.all([ this.loadImage('background', 'images/background.svg'), this.loadImage('icon-marker', 'images/icon/marker.svg') ]).then(() => { this.imagesDidLoad(); }); } imagesDidLoad() { this.map.addSource('positions', { 'type': 'geojson', 'data': this.props.data }); this.map.addLayer({ 'id': 'device-background', 'type': 'symbol', 'source': 'positions', 'layout': { 'icon-image': 'background', 'icon-allow-overlap': true, 'text-field': '{name}', 'text-allow-overlap': true, 'text-anchor': 'bottom', 'text-offset': [0, -2], 'text-font': ['Roboto Regular'], 'text-size': 12 }, 'paint':{ 'text-halo-color': 'white', 'text-halo-width': 1 } }); this.map.addLayer({ 'id': 'device-icon', 'type': 'symbol', 'source': 'positions', 'layout': { 'icon-image': 'icon-marker', 'icon-allow-overlap': true } }); this.map.addControl(new mapboxgl.NavigationControl()); const bounds = this.calculateBounds(); if (bounds) { this.map.fitBounds(bounds, { padding: 100, maxZoom: 9 }); } } calculateBounds() { if (this.props.data.features && this.props.data.features.length) { const first = this.props.data.features[0].geometry.coordinates; const bounds = [[...first], [...first]]; for (let feature of this.props.data.features) { const longitude = feature.geometry.coordinates[0] const latitude = feature.geometry.coordinates[1] if (longitude < bounds[0][0]) { bounds[0][0] = longitude; } else if (longitude > bounds[1][0]) { bounds[1][0] = longitude; } if (latitude < bounds[0][1]) { bounds[0][1] = latitude; } else if (latitude > bounds[1][1]) { bounds[1][1] = latitude; } } return bounds; } else { return null; } } componentDidUpdate(prevProps) { if (this.map) { if (prevProps.mapCenter !== this.props.mapCenter) { this.map.easeTo({ center: this.props.mapCenter }); } if (prevProps.data.features !== this.props.data.features) { this.map.getSource('positions').setData(this.props.data); } } } render() { const style = { position: 'relative', overflow: 'hidden', width: '100%', height: '100%' }; return
this.mapContainer = el} />; } } export default connect(mapStateToProps)(MainMap);