110 lines
2.9 KiB
JavaScript
110 lines
2.9 KiB
JavaScript
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.WKT');
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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 raster = new ol.layer.Tile({
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source: new ol.source.OSM()
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});
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var format = new ol.format.WKT();
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var feature = format.readFeature(
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'POLYGON((10.689697265625 -25.0927734375, 34.595947265625 ' +
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'-20.1708984375, 38.814697265625 -35.6396484375, 13.502197265625 ' +
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'-39.1552734375, 10.689697265625 -25.0927734375))');
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feature.getGeometry().transform('EPSG:4326', 'EPSG:3857');
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var vector = new ol.layer.Vector({
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source: new ol.source.Vector({
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features: [feature]
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})
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});
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var map = new ol.Map({
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layers: [raster, vector],
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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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var dims = {
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a0: [1189, 841],
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a1: [841, 594],
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a2: [594, 420],
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a3: [420, 297],
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a4: [297, 210],
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a5: [210, 148]
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};
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var loading = 0;
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var loaded = 0;
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var exportButton = document.getElementById('export-pdf');
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exportButton.addEventListener('click', function() {
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exportButton.disabled = true;
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document.body.style.cursor = 'progress';
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var format = document.getElementById('format').value;
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var resolution = document.getElementById('resolution').value;
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var dim = dims[format];
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var width = Math.round(dim[0] * resolution / 25.4);
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var height = Math.round(dim[1] * resolution / 25.4);
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var size = /** @type {ol.Size} */ (map.getSize());
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var extent = map.getView().calculateExtent(size);
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var source = raster.getSource();
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var tileLoadStart = function() {
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++loading;
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};
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var tileLoadEnd = function() {
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++loaded;
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if (loading === loaded) {
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var canvas = this;
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window.setTimeout(function() {
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loading = 0;
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loaded = 0;
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var data = canvas.toDataURL('image/png');
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var pdf = new jsPDF('landscape', undefined, format);
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pdf.addImage(data, 'JPEG', 0, 0, dim[0], dim[1]);
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pdf.save('map.pdf');
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source.un('tileloadstart', tileLoadStart);
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source.un('tileloadend', tileLoadEnd, canvas);
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source.un('tileloaderror', tileLoadEnd, canvas);
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map.setSize(size);
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map.getView().fit(extent, size);
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map.renderSync();
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exportButton.disabled = false;
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document.body.style.cursor = 'auto';
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}, 100);
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}
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};
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map.once('postcompose', function(event) {
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source.on('tileloadstart', tileLoadStart);
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source.on('tileloadend', tileLoadEnd, event.context.canvas);
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source.on('tileloaderror', tileLoadEnd, event.context.canvas);
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});
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map.setSize([width, height]);
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map.getView().fit(extent, /** @type {ol.Size} */ (map.getSize()));
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map.renderSync();
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}, false);
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