72 lines
2.0 KiB
JavaScript
72 lines
2.0 KiB
JavaScript
goog.require('ol.Map');
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goog.require('ol.Overlay');
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goog.require('ol.View');
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goog.require('ol.layer.Tile');
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goog.require('ol.source.TileJSON');
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goog.require('ol.source.TileUTFGrid');
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var mapLayer = new ol.layer.Tile({
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source: new ol.source.TileJSON({
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url: 'http://api.tiles.mapbox.com/v3/mapbox.geography-class.json'
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})
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});
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var gridSource = new ol.source.TileUTFGrid({
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url: 'http://api.tiles.mapbox.com/v3/mapbox.geography-class.json'
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});
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var gridLayer = new ol.layer.Tile({source: gridSource});
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var view = new ol.View({
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center: [0, 0],
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zoom: 1
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});
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var mapElement = document.getElementById('map');
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var map = new ol.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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var infoElement = document.getElementById('country-info');
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var flagElement = document.getElementById('country-flag');
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var nameElement = document.getElementById('country-name');
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var infoOverlay = new ol.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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var displayCountryInfo = function(coordinate) {
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var 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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/* jshint -W069 */
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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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/* jshint +W069 */
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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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var 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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