116 lines
2.8 KiB
JavaScript
116 lines
2.8 KiB
JavaScript
import GeoJSON from '../src/ol/format/GeoJSON.js';
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import Map from '../src/ol/Map.js';
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import Select from '../src/ol/interaction/Select.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 View from '../src/ol/View.js';
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import {Fill, Stroke, Style} from '../src/ol/style.js';
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import {altKeyOnly, click, pointerMove} from '../src/ol/events/condition.js';
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const style = new Style({
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fill: new Fill({
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color: '#eeeeee',
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}),
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});
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const vector = new VectorLayer({
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source: new VectorSource({
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url: 'https://openlayers.org/data/vector/ecoregions.json',
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format: new GeoJSON(),
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}),
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background: 'white',
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style: function (feature) {
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const color = feature.get('COLOR') || '#eeeeee';
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style.getFill().setColor(color);
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return style;
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},
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});
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const map = new Map({
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layers: [vector],
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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: 2,
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}),
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});
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let select = null; // ref to currently selected interaction
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const selected = new Style({
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fill: new Fill({
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color: '#eeeeee',
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}),
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stroke: new Stroke({
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color: 'rgba(255, 255, 255, 0.7)',
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width: 2,
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}),
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});
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function selectStyle(feature) {
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const color = feature.get('COLOR') || '#eeeeee';
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selected.getFill().setColor(color);
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return selected;
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}
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// select interaction working on "singleclick"
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const selectSingleClick = new Select({style: selectStyle});
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// select interaction working on "click"
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const selectClick = new Select({
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condition: click,
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style: selectStyle,
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});
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// select interaction working on "pointermove"
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const selectPointerMove = new Select({
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condition: pointerMove,
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style: selectStyle,
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});
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const selectAltClick = new Select({
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style: selectStyle,
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condition: function (mapBrowserEvent) {
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return click(mapBrowserEvent) && altKeyOnly(mapBrowserEvent);
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},
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});
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const selectElement = document.getElementById('type');
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const changeInteraction = function () {
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if (select !== null) {
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map.removeInteraction(select);
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}
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const value = selectElement.value;
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if (value == 'singleclick') {
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select = selectSingleClick;
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} else if (value == 'click') {
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select = selectClick;
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} else if (value == 'pointermove') {
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select = selectPointerMove;
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} else if (value == 'altclick') {
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select = selectAltClick;
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} else {
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select = null;
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}
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if (select !== null) {
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map.addInteraction(select);
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select.on('select', function (e) {
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document.getElementById('status').innerHTML =
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' ' +
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e.target.getFeatures().getLength() +
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' selected features (last operation selected ' +
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e.selected.length +
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' and deselected ' +
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e.deselected.length +
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' features)';
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});
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}
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};
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/**
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* onchange callback on the select element.
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*/
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selectElement.onchange = changeInteraction;
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changeInteraction();
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