X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.app.geo.js%2Fsrc%2Forg.argeo.app.geo.js%2FOpenLayersMapPart.js;h=11cf4980e79c11e7846c30ab93963385aa5aa2ef;hb=eabf7eed1799f890337b45ab9857b1d55192cd30;hp=df7dd969aec4739b3cd555be40945847321ddbc8;hpb=78449dce988dbc690234d0508c6fd609feabe45a;p=gpl%2Fargeo-suite.git

diff --git a/org.argeo.app.geo.js/src/org.argeo.app.geo.js/OpenLayersMapPart.js b/org.argeo.app.geo.js/src/org.argeo.app.geo.js/OpenLayersMapPart.js
index df7dd96..11cf498 100644
--- a/org.argeo.app.geo.js/src/org.argeo.app.geo.js/OpenLayersMapPart.js
+++ b/org.argeo.app.geo.js/src/org.argeo.app.geo.js/OpenLayersMapPart.js
@@ -1,26 +1,55 @@
+/** OpenLayers-based implementation. 
+ * @module OpenLayersMapPart
+ */
+
 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 View from 'ol/View.js';
-import { fromLonLat, toLonLat } 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';
 
+/** OpenLayers implementation of MapPart. */
 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 OSM(),
+					opacity: 0.4,
+					transition: 0,
 				}),
 			],
-			target: 'map',
+			target: this.getMapName(),
 		});
 	}
 
+	/* GEOGRAPHICAL METHODS */
+
 	setZoom(zoom) {
 		this.#map.getView().setZoom(zoom);
 	}
@@ -28,4 +57,169 @@ export default class OpenLayersMapPart extends MapPart {
 	setCenter(lng, lat) {
 		this.#map.getView().setCenter(fromLonLat([lng, lat]));
 	}
+
+	addPoint(lng, lat, style) {
+		let vectorSource = new VectorSource({
+			features: [new Feature({
+				geometry: new Point(fromLonLat([lng, lat]))
+			})]
+		});
+		this.#map.addLayer(new VectorLayer({
+			source: vectorSource,
+			style: style,
+		}));
+	}
+
+	addUrlLayer(url, format, style, sld) {
+		let featureFormat;
+		if (format === 'GEOJSON') {
+			featureFormat = new GeoJSON();
+		}
+		else if (format === 'GPX') {
+			featureFormat = new GPX();
+		} else {
+			throw new Error("Unsupported format " + format);
+		}
+		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);
+	}
+
+
 }