import VectorLayer from 'ol/layer/Vector.js';
import GeoJSON from 'ol/format/GeoJSON.js';
import GPX from 'ol/format/GPX.js';
+import Select from 'ol/interaction/Select.js';
+import Overlay from 'ol/Overlay.js';
import MapPart from './MapPart.js';
import { SentinelCloudless } from './OpenLayerTileSources.js';
export default class OpenLayersMapPart extends MapPart {
/** The OpenLayers Map. */
#map;
+ callbacks = {};
+
// Constructor
constructor() {
super();
});
}
+ /* GEOGRAPHICAL METHODS */
+
setZoom(zoom) {
this.#map.getView().setZoom(zoom);
}
source: vectorSource,
}));
}
+
+ /* CALLBACKS */
+ enableFeatureSingleClick() {
+ // we cannot use 'this' in the function provided to OpenLayers
+ let mapPart = this;
+ this.#map.on('singleclick', function(e) {
+ let feature = null;
+ // we chose the first one
+ e.map.forEachFeatureAtPixel(e.pixel, function(f) {
+ feature = f;
+ return true;
+ });
+ if (feature !== null)
+ mapPart.callbacks['onFeatureSingleClick'](feature.get('path'));
+ });
+ }
+
+ enableFeatureSelected() {
+ // we cannot use 'this' in the function provided to OpenLayers
+ let mapPart = this;
+ var select = new Select();
+ this.#map.addInteraction(select);
+ select.on('select', function(e) {
+ if (e.selected.length > 0) {
+ let feature = e.selected[0];
+ mapPart.callbacks['onFeatureSelected'](feature.get('path'));
+ }
+ });
+ }
+
+ enableFeaturePopup() {
+ // we cannot use 'this' in the function provided to OpenLayers
+ let mapPart = this;
+ /**
+ * Elements that make up the popup.
+ */
+ const container = document.getElementById('popup');
+ const content = document.getElementById('popup-content');
+ const closer = document.getElementById('popup-closer');
+
+ /**
+ * Create an overlay to anchor the popup to the map.
+ */
+ const overlay = new Overlay({
+ element: container,
+ autoPan: false,
+ autoPanAnimation: {
+ duration: 250,
+ },
+ });
+ this.#map.addOverlay(overlay);
+
+ let selected = null;
+ this.#map.on('pointermove', function(e) {
+ if (selected !== null) {
+ selected.setStyle(undefined);
+ selected = null;
+ }
+
+ e.map.forEachFeatureAtPixel(e.pixel, function(f) {
+ selected = f;
+ return true;
+ });
+
+ if (selected == null) {
+ overlay.setPosition(undefined);
+ return;
+ }
+ const coordinate = e.coordinate;
+ const path = selected.get('path');
+ const res = mapPart.callbacks['onFeaturePopup'](path);
+ if (res != null) {
+ content.innerHTML = res;
+ overlay.setPosition(coordinate);
+ } else {
+ overlay.setPosition(undefined);
+ }
+ });
+ }
}