93 lines
2.4 KiB
JavaScript
93 lines
2.4 KiB
JavaScript
import Draw from '../src/ol/interaction/Draw.js';
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import Feature from '../src/ol/Feature.js';
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import Fill from '../src/ol/style/Fill.js';
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import GeoJSON from '../src/ol/format/GeoJSON.js';
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import LineString from '../src/ol/geom/LineString.js';
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import Map from '../src/ol/Map.js';
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import Snap from '../src/ol/interaction/Snap.js';
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import Stroke from '../src/ol/style/Stroke.js';
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import Style from '../src/ol/style/Style.js';
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import View from '../src/ol/View.js';
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import {OSM, Vector as VectorSource} from '../src/ol/source.js';
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import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
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const raster = new TileLayer({
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source: new OSM(),
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});
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// features in this layer will be snapped to
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const baseVector = new VectorLayer({
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source: new VectorSource({
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format: new GeoJSON(),
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url: "https://ahocevar.com/geoserver/wfs?service=wfs&request=getfeature&typename=topp:states&cql_filter=STATE_NAME='Idaho'&outputformat=application/json",
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}),
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});
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// this is were the drawn features go
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const drawVector = new VectorLayer({
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source: new VectorSource(),
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style: new Style({
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stroke: new Stroke({
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color: 'rgba(100, 255, 0, 1)',
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width: 2,
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}),
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fill: new Fill({
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color: 'rgba(100, 255, 0, 0.3)',
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}),
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}),
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});
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// this line only appears when we're tracing a feature outer ring
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const previewLine = new Feature({
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geometry: new LineString([]),
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});
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const previewVector = new VectorLayer({
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source: new VectorSource({
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features: [previewLine],
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}),
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style: new Style({
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stroke: new Stroke({
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color: 'rgba(255, 0, 0, 1)',
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width: 2,
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}),
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}),
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});
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const map = new Map({
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layers: [raster, baseVector, drawVector, previewVector],
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target: 'map',
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view: new View({
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center: [-12986427, 5678422],
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zoom: 5,
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}),
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});
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let drawInteraction;
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const snapInteraction = new Snap({
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source: baseVector.getSource(),
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});
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const typeSelect = document.getElementById('type');
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function addInteraction() {
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const value = typeSelect.value;
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if (value !== 'None') {
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drawInteraction = new Draw({
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type: value,
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source: drawVector.getSource(),
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trace: true,
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traceSource: baseVector.getSource(),
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});
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map.addInteraction(drawInteraction);
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map.addInteraction(snapInteraction);
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}
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}
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typeSelect.onchange = function () {
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map.removeInteraction(drawInteraction);
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map.removeInteraction(snapInteraction);
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addInteraction();
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};
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addInteraction();
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