@geogirafe/lib-geoportal/components/map/tools/osmmanager.js

GeoGirafe is a flexible application to build online geoportals.

import TileLayer from 'ol/layer/Tile.js';
import OSM from 'ol/source/OSM.js';
class OsmManager {
    map;
    basemapLayers = {};
    constructor(map) {
        this.map = map;
    }
    removeAllBasemapLayers() {
        for (const basemap of Object.values(this.basemapLayers)) {
            this.map.removeLayer(basemap.olayer);
        }
        this.basemapLayers = {};
    }
    addBasemapLayer(layer) {
        const olayer = new TileLayer({
            source: new OSM()
        });
        this.basemapLayers[layer.treeItemId] = {
            olayer: olayer,
            layerOsm: layer
        };
        // For basemap, set a minimal number (arbitrary defined to less than -5000)
        olayer.setZIndex(-5000 - layer.order);
        this.map.addLayer(olayer);
    }
    changeOpacity(layerInfos) {
        if (layerInfos.hasValidOpacity) {
            this.basemapLayers[layerInfos.treeItemId].olayer.setOpacity(layerInfos.opacity);
        }
    }
}
export default OsmManager;