67 lines
1.5 KiB
JavaScript
67 lines
1.5 KiB
JavaScript
import Map from '../src/ol/Map.js';
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import View from '../src/ol/View.js';
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import TileLayer from '../src/ol/layer/Tile.js';
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import WebGLPointsLayer from '../src/ol/layer/WebGLPoints.js';
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import GeoJSON from '../src/ol/format/GeoJSON.js';
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import Vector from '../src/ol/source/Vector.js';
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import OSM from '../src/ol/source/OSM.js';
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const vectorSource = new Vector({
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url: 'data/geojson/world-cities.geojson',
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format: new GeoJSON()
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});
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let literalStyle = {
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symbol: {
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size: 4,
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color: '#3388FF',
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rotateWithView: false,
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offset: [0, 0],
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opacity: 1
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}
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};
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let pointsLayer;
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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 OSM()
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})
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],
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target: document.getElementById('map'),
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view: new View({
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center: [0, 0],
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zoom: 2
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})
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});
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const editor = document.getElementById('style-editor');
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function refreshLayer() {
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if (pointsLayer) {
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map.removeLayer(pointsLayer);
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}
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pointsLayer = new WebGLPointsLayer({
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source: vectorSource,
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style: literalStyle
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});
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map.addLayer(pointsLayer);
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editor.value = JSON.stringify(literalStyle, null, ' ');
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}
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function setStyleStatus(valid) {
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document.getElementById('style-valid').style.display = valid ? 'initial' : 'none';
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document.getElementById('style-invalid').style.display = !valid ? 'initial' : 'none';
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}
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editor.addEventListener('input', function() {
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try {
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literalStyle = JSON.parse(editor.value);
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refreshLayer();
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setStyleStatus(true);
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} catch (e) {
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setStyleStatus(false);
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}
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});
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refreshLayer();
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