054af09032
This updates ESLint and our shared eslint-config-openlayers to use Prettier. Most formatting changes were automatically applied with this:
npm run lint -- --fix
A few manual changes were required:
* In `examples/offscreen-canvas.js`, the `//eslint-disable-line` comment needed to be moved to the appropriate line to disable the error about the `'worker-loader!./offscreen-canvas.worker.js'` import.
* In `examples/webpack/exapmle-builder.js`, spaces could not be added after a couple `function`s for some reason. While editing this, I reworked `ExampleBuilder` to be a class.
* In `src/ol/format/WMSGetFeatureInfo.js`, the `// @ts-ignore` comment needed to be moved down one line so it applied to the `parsersNS` argument.
95 lines
2.7 KiB
JavaScript
95 lines
2.7 KiB
JavaScript
import Map from '../src/ol/Map.js';
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import SourceState from '../src/ol/source/State.js';
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import Stamen from '../src/ol/source/Stamen.js';
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import View from '../src/ol/View.js';
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import {Layer, Tile as TileLayer} from '../src/ol/layer.js';
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import {fromLonLat, toLonLat} from '../src/ol/proj.js';
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import {getCenter, getWidth} from '../src/ol/extent.js';
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class CanvasLayer extends Layer {
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constructor(options) {
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super(options);
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this.features = options.features;
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this.svg = d3
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.select(document.createElement('div'))
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.append('svg')
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.style('position', 'absolute');
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this.svg.append('path').datum(this.features).attr('class', 'boundary');
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}
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getSourceState() {
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return SourceState.READY;
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}
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render(frameState) {
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const width = frameState.size[0];
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const height = frameState.size[1];
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const projection = frameState.viewState.projection;
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const d3Projection = d3.geoMercator().scale(1).translate([0, 0]);
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let d3Path = d3.geoPath().projection(d3Projection);
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const pixelBounds = d3Path.bounds(this.features);
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const pixelBoundsWidth = pixelBounds[1][0] - pixelBounds[0][0];
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const pixelBoundsHeight = pixelBounds[1][1] - pixelBounds[0][1];
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const geoBounds = d3.geoBounds(this.features);
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const geoBoundsLeftBottom = fromLonLat(geoBounds[0], projection);
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const geoBoundsRightTop = fromLonLat(geoBounds[1], projection);
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let geoBoundsWidth = geoBoundsRightTop[0] - geoBoundsLeftBottom[0];
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if (geoBoundsWidth < 0) {
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geoBoundsWidth += getWidth(projection.getExtent());
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}
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const geoBoundsHeight = geoBoundsRightTop[1] - geoBoundsLeftBottom[1];
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const widthResolution = geoBoundsWidth / pixelBoundsWidth;
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const heightResolution = geoBoundsHeight / pixelBoundsHeight;
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const r = Math.max(widthResolution, heightResolution);
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const scale = r / frameState.viewState.resolution;
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const center = toLonLat(getCenter(frameState.extent), projection);
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d3Projection
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.scale(scale)
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.center(center)
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.translate([width / 2, height / 2]);
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d3Path = d3Path.projection(d3Projection);
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d3Path(this.features);
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this.svg.attr('width', width);
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this.svg.attr('height', height);
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this.svg.select('path').attr('d', d3Path);
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return this.svg.node();
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}
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}
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const map = new Map({
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layers: [
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new TileLayer({
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source: new Stamen({
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layer: 'watercolor',
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}),
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}),
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],
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target: 'map',
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view: new View({
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center: fromLonLat([-97, 38]),
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zoom: 4,
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}),
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});
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/**
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* Load the topojson data and create an ol/layer/Image for that data.
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*/
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d3.json('data/topojson/us.json').then(function (us) {
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const layer = new CanvasLayer({
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features: topojson.feature(us, us.objects.counties),
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});
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map.addLayer(layer);
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});
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