/
app.js
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/
app.js
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/* global window,document */
import React, {Component} from 'react';
import {render} from 'react-dom';
import MapGL from 'react-map-gl';
import DeckGLOverlay from './deckgl-overlay.js';
// chroma.js - for manipulating colours.
// (can generate continuous scales like colorbrewer..)
import chroma from 'chroma-js';
import {json as requestJson} from 'd3-request';
// Set your mapbox token here
const MAPBOX_TOKEN = process.env.MapboxAccessToken; // eslint-disable-line
const DATA_URL = 'data/cardiff_segments.geojson';
var colorScale = (function() {
var scale = chroma.scale(['white', 'yellow', 'orange', 'red', 'black']).domain([0.5, 0]);
return function(r) {
return scale(r).alpha((1+r)*128).rgba();
}
})();
class Root extends Component {
constructor(props) {
super(props);
this.state = {
viewport: {
...DeckGLOverlay.defaultViewport,
width: 500,
height: 500
},
data: null
};
requestJson(DATA_URL, (error, response) => {
if (!error) {
this.setState({data: response});
}
});
}
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}
mapStyle="mapbox://styles/mapbox/satellite-v9"
onViewportChange={this._onViewportChange.bind(this)}
mapboxApiAccessToken={MAPBOX_TOKEN}>
<DeckGLOverlay viewport={viewport}
data={data}
colorScale={colorScale} />
</MapGL>
);
}
}
render(<Root />, document.body.appendChild(document.createElement('div')));