126 lines
2.7 KiB
JavaScript
126 lines
2.7 KiB
JavaScript
// A map that can be used to locate a single point by setting its location explicitly
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// or by allowing the user to move a marker.
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class MapLocatorReadOnly extends HTMLElement {
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constructor() {
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super();
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// Create a shadow DOM
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this.attachShadow({ mode: "open" });
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// Initial render
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this.render();
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// markers shown on the map. Should be none or 1, generally.
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this._markers = [];
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}
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// Lifecycle: when element is added to the DOM
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connectedCallback() {
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// Initialize the map when the element is added to the DOM
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setTimeout(() => this._initializeMap(), 0);
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}
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disconnectedCallback() {
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if (this._map) {
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this._map.remove();
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}
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}
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_initializeMap() {
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console.log("Setting up the locator read-only...");
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const marker_str = this.getAttribute("marker");
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const marker = JSON.parse(marker_str);
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const mapElement = this.shadowRoot.querySelector("#map");
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this._map = new maplibregl.Map({
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container: mapElement,
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center: marker.coordinates,
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//style: "https://tiles.stadiamaps.com/styles/alidade_smooth.json",
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style: "https://tiles.stadiamaps.com/styles/osm_bright.json",
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zoom: 16,
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});
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this._map.on("load", () => {
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console.log("map locator read-only loaded");
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const m = new maplibregl.Marker({
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color: "#FF0000",
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draggable: true,
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})
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.setLngLat(marker.coordinates)
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.addTo(this._map);
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this.dispatchEvent(markerDraggedEvent);
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this.dispatchEvent(
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new CustomEvent("load", {
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bubbles: true,
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composed: true, // Allows event to cross shadow DOM boundary
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detail: {
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map: this,
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},
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}),
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);
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});
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this._map.on("zoomend", (e) => {
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this.dispatchEvent(
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new CustomEvent("zoomend", {
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bubbles: true,
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composed: true,
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detail: e,
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}),
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);
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});
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}
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// Initial render of component
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render() {
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this.shadowRoot.innerHTML = `
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<style>
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@import url("//unpkg.com/maplibre-gl@5.0.1/dist/maplibre-gl.css");
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#map {
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height: 100%;
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width:100%;
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}
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#map img {
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max-width: none;
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min-width: 0px;
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height: auto;
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}
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</style>
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<div id="map"></div>
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`;
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}
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GetZoom() {
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return this._map.getZoom();
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}
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JumpTo(args) {
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this._map.jumpTo(args);
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}
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PanTo(coords, options) {
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this._map.panTo(coords, options);
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}
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SetMarker(coords) {
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console.log("Setting map marker", coords);
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this._markers.forEach((marker) => marker.remove());
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const marker = new maplibregl.Marker({
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color: "#FF0000",
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draggable: true,
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})
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.setLngLat(coords)
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.addTo(this._map);
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marker.on("dragend", (e) => {
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const markerDraggedEvent = new CustomEvent("markerdragend", {
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detail: {
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marker: marker,
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},
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});
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this.dispatchEvent(markerDraggedEvent);
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});
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this._markers = [marker];
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}
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}
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customElements.define("map-locator-ro", MapLocatorReadOnly);
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