101 lines
2.4 KiB
JavaScript
101 lines
2.4 KiB
JavaScript
goog.require('ol.Map');
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goog.require('ol.RendererHint');
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goog.require('ol.View2D');
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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.proj');
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goog.require('ol.source.MapQuestOpenAerial');
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goog.require('ol.source.Vector');
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goog.require('ol.style.Fill');
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goog.require('ol.style.Stroke');
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goog.require('ol.style.Style');
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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.MapQuestOpenAerial()
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})
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],
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renderer: ol.RendererHint.CANVAS,
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target: 'map',
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view: new ol.View2D({
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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 vectorSource = new ol.source.Vector();
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var style = new ol.style.Style({
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fill: new ol.style.Fill({
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color: 'rgba(255, 255, 255, 0.6)'
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}),
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stroke: new ol.style.Stroke({
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color: '#319FD3',
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width: 1
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})
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});
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$.getJSON('data/countries.geojson', function(data) {
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var format = new ol.format.GeoJSON();
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var transformFn = ol.proj.getTransform('EPSG:4326', 'EPSG:3857');
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format.readObject(data, function(feature) {
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var geometry = feature.getGeometry();
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geometry.transform(transformFn);
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feature.setGeometry(geometry);
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vectorSource.addFeature(feature);
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});
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map.getLayers().push(new ol.layer.Vector({
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source: vectorSource,
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styleFunction: function(feature) {
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return style;
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}
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}));
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});
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var highlight;
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var displayFeatureInfo = function(pixel) {
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var oldHighlight = highlight;
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var coordinate = map.getCoordinateFromPixel(pixel);
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var features = vectorSource.getAllFeaturesAtCoordinate(coordinate);
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var info = document.getElementById('info');
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if (features.length > 0) {
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var feature = features[0];
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info.innerHTML = feature.getId() + ': ' + features[0].get('name');
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highlight = feature;
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} else {
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info.innerHTML = ' ';
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highlight = undefined;
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}
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if (highlight !== oldHighlight) {
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map.requestRenderFrame();
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}
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};
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$(map.getViewport()).on('mousemove', function(evt) {
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var pixel = map.getEventPixel(evt.originalEvent);
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displayFeatureInfo(pixel);
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});
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map.on('singleclick', function(evt) {
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var pixel = evt.getPixel();
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displayFeatureInfo(pixel);
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});
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var highlightStyle = new ol.style.Style({
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stroke: new ol.style.Stroke({
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color: '#f00',
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width: 1
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}),
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fill: new ol.style.Fill({
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color: 'rgba(255,0,0,0.1)'
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})
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});
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map.on('postcompose', function(evt) {
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if (highlight) {
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var render = evt.getRender();
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render.drawFeature(highlight, highlightStyle);
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}
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});
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