93 lines
1.9 KiB
JavaScript
93 lines
1.9 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 GeoJSON from '../src/ol/format/GeoJSON.js';
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import VectorImageLayer from '../src/ol/layer/VectorImage.js';
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import VectorLayer from '../src/ol/layer/Vector.js';
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import VectorSource from '../src/ol/source/Vector.js';
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import {Fill, Stroke, Style, Text} from '../src/ol/style.js';
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const style = new Style({
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fill: new Fill({
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color: 'rgba(255, 255, 255, 0.6)'
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}),
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stroke: new Stroke({
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color: '#319FD3',
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width: 1
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}),
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text: new Text()
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});
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const map = new Map({
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layers: [
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new VectorImageLayer({
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imageRatio: 2,
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source: new VectorSource({
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url: 'data/geojson/countries.geojson',
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format: new GeoJSON()
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}),
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style: function(feature) {
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style.getText().setText(feature.get('name'));
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return style;
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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: [0, 0],
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zoom: 1
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})
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});
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const featureOverlay = new VectorLayer({
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source: new VectorSource(),
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map: map,
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style: new Style({
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stroke: new Stroke({
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color: '#f00',
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width: 1
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}),
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fill: new Fill({
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color: 'rgba(255,0,0,0.1)'
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})
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})
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});
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let highlight;
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const displayFeatureInfo = function(pixel) {
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const feature = map.forEachFeatureAtPixel(pixel, function(feature) {
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return feature;
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});
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const info = document.getElementById('info');
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if (feature) {
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info.innerHTML = feature.getId() + ': ' + feature.get('name');
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} else {
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info.innerHTML = ' ';
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}
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if (feature !== highlight) {
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if (highlight) {
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featureOverlay.getSource().removeFeature(highlight);
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}
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if (feature) {
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featureOverlay.getSource().addFeature(feature);
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}
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highlight = feature;
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}
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};
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map.on('pointermove', function(evt) {
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if (evt.dragging) {
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return;
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}
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const pixel = map.getEventPixel(evt.originalEvent);
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displayFeatureInfo(pixel);
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});
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map.on('click', function(evt) {
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displayFeatureInfo(evt.pixel);
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});
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