*/
import Map from 'ol/Map.js';
+import View from 'ol/View.js';
import OSM from 'ol/source/OSM.js';
import TileLayer from 'ol/layer/Tile.js';
-import { fromLonLat } from 'ol/proj.js';
+import { fromLonLat, getPointResolution } from 'ol/proj.js';
import VectorSource from 'ol/source/Vector.js';
import Feature from 'ol/Feature.js';
import { Point } from 'ol/geom.js';
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 { Style, Icon } from 'ol/style.js';
+
+import * as SLDReader from '@nieuwlandgeo/sldreader';
import MapPart from './MapPart.js';
import { SentinelCloudless } from './OpenLayerTileSources.js';
export default class OpenLayersMapPart extends MapPart {
/** The OpenLayers Map. */
#map;
- // Constructor
- constructor() {
- super();
+
+ /** Externally added callback functions. */
+ callbacks = {};
+
+ /** Constructor taking the mapName as an argument. */
+ constructor(mapName) {
+ super(mapName);
this.#map = new Map({
layers: [
- new TileLayer({
- source: new SentinelCloudless(),
- }),
+ // new TileLayer({
+ // source: new SentinelCloudless(),
+ // }),
new TileLayer({
source: new OSM(),
opacity: 0.4,
transition: 0,
}),
],
- target: 'map',
+ target: this.getMapName(),
});
}
+ /* GEOGRAPHICAL METHODS */
+
setZoom(zoom) {
this.#map.getView().setZoom(zoom);
}
geometry: new Point(fromLonLat([lng, lat]))
})]
});
- this.#map.addLayer(new VectorLayer({ source: vectorSource }));
+ this.#map.addLayer(new VectorLayer({
+ source: vectorSource,
+ style: style,
+ }));
}
- addUrlLayer(url, format) {
- let vectorSource;
+ addUrlLayer(url, format, style, sld) {
+ let featureFormat;
if (format === 'GEOJSON') {
- vectorSource = new VectorSource({ url: url, format: new GeoJSON() })
+ featureFormat = new GeoJSON();
}
else if (format === 'GPX') {
- vectorSource = new VectorSource({ url: url, format: new GPX() })
+ featureFormat = new GPX();
+ } else {
+ throw new Error("Unsupported format " + format);
}
- this.#map.addLayer(new VectorLayer({
+ const vectorSource = new VectorSource({
+ url: url,
+ format: featureFormat,
+ });
+ const vectorLayer = new VectorLayer({
source: vectorSource,
- }));
+ });
+ if (sld) {
+ this.#applySLD(vectorLayer, style);
+ } else if (style !== null) {
+ vectorLayer.setStyle(style);
+ }
+ this.#map.addLayer(vectorLayer);
+ }
+
+
+ /* 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');
+ if (path === null)
+ return true;
+ const res = mapPart.callbacks['onFeaturePopup'](path);
+ if (res != null) {
+ content.innerHTML = res;
+ overlay.setPosition(coordinate);
+ } else {
+ overlay.setPosition(undefined);
+ }
+ });
+ }
+
+ //
+ // HTML
+ //
+ getMapDivCssClass() {
+ return 'map';
+ }
+
+ //
+ // STATIC FOR EXTENSION
+ //
+ static newStyle(args) {
+ return new Style(args);
+ }
+
+ static newIcon(args) {
+ return new Icon(args);
+ }
+
+ //
+ // SLD STYLING
+ //
+ #applySLD(vectorLayer, text) {
+ const sldObject = SLDReader.Reader(text);
+ const sldLayer = SLDReader.getLayer(sldObject);
+ const style = SLDReader.getStyle(sldLayer);
+ const featureTypeStyle = style.featuretypestyles[0];
+
+ const viewProjection = this.#map.getView().getProjection();
+ const olStyleFunction = SLDReader.createOlStyleFunction(featureTypeStyle, {
+ // Use the convertResolution option to calculate a more accurate resolution.
+ convertResolution: viewResolution => {
+ const viewCenter = this.#map.getView().getCenter();
+ return getPointResolution(viewProjection, viewResolution, viewCenter);
+ },
+ // If you use point icons with an ExternalGraphic, you have to use imageLoadCallback
+ // to update the vector layer when an image finishes loading.
+ // If you do not do this, the image will only be visible after next layer pan/zoom.
+ imageLoadedCallback: () => {
+ vectorLayer.changed();
+ },
+ });
+ vectorLayer.setStyle(olStyleFunction);
+ }
+
+
}
projects / gpl / argeo-suite.git / blobdiff