62 lines
1.5 KiB
JavaScript
62 lines
1.5 KiB
JavaScript
// NOCOMPILE
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// this example uses FileSaver.js for which we don't have an externs file.
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goog.require('ol.Map');
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goog.require('ol.View');
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goog.require('ol.control');
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goog.require('ol.format.GeoJSON');
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goog.require('ol.layer.Tile');
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goog.require('ol.layer.Vector');
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goog.require('ol.source.OSM');
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goog.require('ol.source.Vector');
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var map = new ol.Map({
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layers: [
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new ol.layer.Tile({
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source: new ol.source.OSM()
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}),
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new ol.layer.Vector({
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source: new ol.source.Vector({
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url: 'data/geojson/countries.geojson',
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format: new ol.format.GeoJSON()
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})
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})
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],
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target: 'map',
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controls: ol.control.defaults({
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attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
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collapsible: false
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})
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}),
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view: new ol.View({
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center: [0, 0],
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zoom: 2
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})
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});
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document.getElementById('export-png').addEventListener('click', function() {
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map.once('postcompose', function(event) {
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var canvas = event.context.canvas;
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if (isIE()) {
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window.navigator.msSaveBlob(canvas.msToBlob(), 'map.png');
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} else {
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canvas.toBlob(function(blob) {
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saveAs(blob, 'map.png');
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});
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}
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});
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map.renderSync();
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});
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function isIE() {
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var sAgent = window.navigator.userAgent;
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var Idx = sAgent.indexOf('MSIE');
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// If IE, return true.
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if (Idx > 0)
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return true;
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// If IE 11 then look for Updated user agent string.
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else if (navigator.userAgent.match(/Trident\/7\./))
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return true;
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else
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return false;
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}
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