88 lines
2.4 KiB
JavaScript
88 lines
2.4 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 _ol_events_condition_ from '../src/ol/events/condition.js';
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import GeoJSON from '../src/ol/format/GeoJSON.js';
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import _ol_interaction_Select_ from '../src/ol/interaction/Select.js';
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import TileLayer from '../src/ol/layer/Tile.js';
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import VectorLayer from '../src/ol/layer/Vector.js';
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import OSM from '../src/ol/source/OSM.js';
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import VectorSource from '../src/ol/source/Vector.js';
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var raster = new TileLayer({
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source: new OSM()
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});
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var vector = new VectorLayer({
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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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});
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var map = new Map({
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layers: [raster, 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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var select = null; // ref to currently selected interaction
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// select interaction working on "singleclick"
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var selectSingleClick = new _ol_interaction_Select_();
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// select interaction working on "click"
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var selectClick = new _ol_interaction_Select_({
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condition: _ol_events_condition_.click
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});
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// select interaction working on "pointermove"
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var selectPointerMove = new _ol_interaction_Select_({
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condition: _ol_events_condition_.pointerMove
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});
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var selectAltClick = new _ol_interaction_Select_({
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condition: function(mapBrowserEvent) {
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return _ol_events_condition_.click(mapBrowserEvent) &&
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_ol_events_condition_.altKeyOnly(mapBrowserEvent);
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}
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});
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var selectElement = document.getElementById('type');
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var changeInteraction = function() {
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if (select !== null) {
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map.removeInteraction(select);
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}
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var 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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e.target.getFeatures().getLength() +
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' selected features (last operation selected ' + e.selected.length +
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' and deselected ' + e.deselected.length + ' 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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