73 lines
2.1 KiB
JavaScript
73 lines
2.1 KiB
JavaScript
import Map from '../src/ol/Map.js';
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import Overlay from '../src/ol/Overlay.js';
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import View from '../src/ol/View.js';
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import TileLayer from '../src/ol/layer/Tile.js';
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import TileJSON from '../src/ol/source/TileJSON.js';
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import UTFGrid from '../src/ol/source/UTFGrid.js';
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const key = 'pk.eyJ1IjoiYWhvY2V2YXIiLCJhIjoiY2pzbmg0Nmk5MGF5NzQzbzRnbDNoeHJrbiJ9.7_-_gL8ur7ZtEiNwRfCy7Q';
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const mapLayer = new TileLayer({
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source: new TileJSON({
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url: 'https://api.tiles.mapbox.com/v4/mapbox.geography-class.json?secure&access_token=' + key
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})
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});
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const gridSource = new UTFGrid({
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url: 'https://api.tiles.mapbox.com/v4/mapbox.geography-class.json?secure&access_token=' + key
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});
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const gridLayer = new TileLayer({source: gridSource});
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const view = new View({
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center: [0, 0],
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zoom: 1
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});
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const mapElement = document.getElementById('map');
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const map = new Map({
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layers: [mapLayer, gridLayer],
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target: mapElement,
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view: view
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});
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const infoElement = document.getElementById('country-info');
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const flagElement = document.getElementById('country-flag');
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const nameElement = document.getElementById('country-name');
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const infoOverlay = new Overlay({
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element: infoElement,
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offset: [15, 15],
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stopEvent: false
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});
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map.addOverlay(infoOverlay);
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const displayCountryInfo = function(coordinate) {
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const viewResolution = /** @type {number} */ (view.getResolution());
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gridSource.forDataAtCoordinateAndResolution(coordinate, viewResolution,
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function(data) {
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// If you want to use the template from the TileJSON,
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// load the mustache.js library separately and call
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// info.innerHTML = Mustache.render(gridSource.getTemplate(), data);
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mapElement.style.cursor = data ? 'pointer' : '';
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if (data) {
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flagElement.src = 'data:image/png;base64,' + data['flag_png'];
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nameElement.innerHTML = data['admin'];
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}
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infoOverlay.setPosition(data ? coordinate : undefined);
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});
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};
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map.on('pointermove', function(evt) {
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if (evt.dragging) {
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return;
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}
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const coordinate = map.getEventCoordinate(evt.originalEvent);
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displayCountryInfo(coordinate);
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});
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map.on('click', function(evt) {
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displayCountryInfo(evt.coordinate);
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});
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