113 lines
2.5 KiB
JavaScript
113 lines
2.5 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 Draw from '../src/ol/interaction/Draw.js';
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import Snap from '../src/ol/interaction/Snap.js';
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import Style from '../src/ol/style/Style.js';
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import Stroke from '../src/ol/style/Stroke.js';
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import Collection from '../src/ol/Collection.js';
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import GeoJSON from '../src/ol/format/GeoJSON.js';
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import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
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import {OSM, Vector as VectorSource} from '../src/ol/source.js';
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const raster = new TileLayer({
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source: new OSM()
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});
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const sampleFeatures = new Collection();
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sampleFeatures.push(
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new GeoJSON().readFeature({
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type: 'LineString',
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coordinates: [
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[-12000000, 4600000],
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[-12000000, 4000000],
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[-10000000, 5600000],
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[-9000000, 3000000],
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[-10000000, 4000000],
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[-11000000, 3000000],
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[-13000000, 4000000],
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[-12000000, 5600000]
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]
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})
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);
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const sampleVector = new VectorLayer({
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source: new VectorSource({
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features: sampleFeatures,
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wrapX: false
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}),
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style: new Style({
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stroke: new Stroke({
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color: 'rgba(0, 256, 0, 1)',
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width: 3
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})
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})
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});
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const source = new VectorSource({wrapX: false});
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const vector = new VectorLayer({
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source: source
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});
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const map = new Map({
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layers: [raster, sampleVector, vector],
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target: 'map',
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view: new View({
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center: [-11000000, 4600000],
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zoom: 4
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})
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});
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let draw; // global so we can remove it later
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map.on('click', (event) => {
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let clickedFeature = null;
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map.forEachFeatureAtPixel(
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event.pixel,
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(feature) => {
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clickedFeature = feature;
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}, {
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hitTolerance: 10,
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layerFilter: (layer) => {
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return layer === sampleVector;
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}
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}
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);
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if (clickedFeature !== null) {
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// In this demo we remove the new point that was clicked,
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// and add the whole feature instead:
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draw.removeLastPoint();
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draw.appendCoordinates(clickedFeature.getGeometry().getCoordinates());
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}
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});
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const snapInteraction = new Snap({
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source: sampleVector.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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draw = new Draw({
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source: source,
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type: typeSelect.value
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});
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map.addInteraction(draw);
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map.addInteraction(snapInteraction);
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}
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}
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/**
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* Handle change event.
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*/
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typeSelect.onchange = function() {
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map.removeInteraction(draw);
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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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