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.
107 lines
3.3 KiB
JavaScript
107 lines
3.3 KiB
JavaScript
import Map from '../src/ol/Map.js';
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import TileLayer from '../src/ol/layer/Tile.js';
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import View from '../src/ol/View.js';
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import XYZ from '../src/ol/source/XYZ.js';
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import {fromLonLat} from '../src/ol/proj.js';
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import {getRenderPixel} from '../src/ol/render.js';
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const key = 'get_your_own_D6rA4zTHduk6KOKTXzGB';
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const attributions =
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'<a href="https://www.maptiler.com/copyright/" target="_blank">© MapTiler</a> ' +
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'<a href="https://www.openstreetmap.org/copyright" target="_blank">© OpenStreetMap contributors</a>';
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const imagery = new TileLayer({
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source: new XYZ({
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attributions: attributions,
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url: 'https://api.maptiler.com/tiles/satellite/{z}/{x}/{y}.jpg?key=' + key,
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maxZoom: 20,
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crossOrigin: '',
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}),
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});
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const container = document.getElementById('map');
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const map = new Map({
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layers: [imagery],
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target: container,
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view: new View({
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center: fromLonLat([-109, 46.5]),
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zoom: 6,
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}),
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});
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let radius = 75;
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document.addEventListener('keydown', function (evt) {
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if (evt.which === 38) {
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radius = Math.min(radius + 5, 150);
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map.render();
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evt.preventDefault();
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} else if (evt.which === 40) {
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radius = Math.max(radius - 5, 25);
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map.render();
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evt.preventDefault();
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}
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});
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// get the pixel position with every move
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let mousePosition = null;
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container.addEventListener('mousemove', function (event) {
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mousePosition = map.getEventPixel(event);
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map.render();
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});
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container.addEventListener('mouseout', function () {
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mousePosition = null;
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map.render();
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});
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// after rendering the layer, show an oversampled version around the pointer
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imagery.on('postrender', function (event) {
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if (mousePosition) {
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const pixel = getRenderPixel(event, mousePosition);
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const offset = getRenderPixel(event, [
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mousePosition[0] + radius,
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mousePosition[1],
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]);
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const half = Math.sqrt(
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Math.pow(offset[0] - pixel[0], 2) + Math.pow(offset[1] - pixel[1], 2)
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);
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const context = event.context;
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const centerX = pixel[0];
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const centerY = pixel[1];
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const originX = centerX - half;
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const originY = centerY - half;
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const size = Math.round(2 * half + 1);
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const sourceData = context.getImageData(originX, originY, size, size).data;
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const dest = context.createImageData(size, size);
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const destData = dest.data;
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for (let j = 0; j < size; ++j) {
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for (let i = 0; i < size; ++i) {
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const dI = i - half;
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const dJ = j - half;
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const dist = Math.sqrt(dI * dI + dJ * dJ);
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let sourceI = i;
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let sourceJ = j;
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if (dist < half) {
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sourceI = Math.round(half + dI / 2);
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sourceJ = Math.round(half + dJ / 2);
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}
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const destOffset = (j * size + i) * 4;
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const sourceOffset = (sourceJ * size + sourceI) * 4;
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destData[destOffset] = sourceData[sourceOffset];
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destData[destOffset + 1] = sourceData[sourceOffset + 1];
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destData[destOffset + 2] = sourceData[sourceOffset + 2];
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destData[destOffset + 3] = sourceData[sourceOffset + 3];
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}
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}
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context.beginPath();
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context.arc(centerX, centerY, half, 0, 2 * Math.PI);
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context.lineWidth = (3 * half) / radius;
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context.strokeStyle = 'rgba(255,255,255,0.5)';
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context.putImageData(dest, originX, originY);
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context.stroke();
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context.restore();
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}
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});
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