Add kml-timezones example
This commit is contained in:
Tom Payne
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examples/kml-timezones.html
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63
examples/kml-timezones.html
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="chrome=1">
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<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
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<link rel="stylesheet" href="../css/ol.css" type="text/css">
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<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap.min.css" type="text/css">
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<link rel="stylesheet" href="../resources/layout.css" type="text/css">
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<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap-responsive.min.css" type="text/css">
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<title>Timezones in KML</title>
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<style>
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#map {
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position: relative;
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}
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#info {
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position: absolute;
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height: 1px;
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width: 1px;
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z-index: 100;
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}
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</style>
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</head>
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<body>
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<div class="navbar navbar-inverse navbar-fixed-top">
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<div class="navbar-inner">
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<div class="container">
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<a class="brand" href="./"><img src="../resources/logo.png"> OpenLayers 3 Examples</a>
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</div>
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</div>
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</div>
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<div class="container-fluid">
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<div class="row-fluid">
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<div class="span12">
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<div id="map" class="map"><div id="info"></div></div>
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</div>
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</div>
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<div class="row-fluid">
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<div class="span12">
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<h4 id="title">Timezones in KML</h4>
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<p id="shortdesc">Demonstrates rendering timezones from KML.</p>
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<div id="docs">
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<p>This example parses a KML file and renders the features as a vector layer. The layer is given a <code>ol.style.Style</code> that fills timezones yellow with an opacity calculated based on the current offset to local noon.</p>
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<p>See the <a href="kml-timezones.js" target="_blank">kml-timezones.js source</a> to see how this is done.</p>
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</div>
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<div id="tags">KML, vector, style</div>
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</div>
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</div>
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</div>
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<script src="jquery.min.js" type="text/javascript"></script>
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<script src="../resources/bootstrap/js/bootstrap.min.js" type="text/javascript"></script>
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<script src="loader.js?id=kml-timezones" type="text/javascript"></script>
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<script src="../resources/example-behaviour.js" type="text/javascript"></script>
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</body>
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</html>
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102
examples/kml-timezones.js
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102
examples/kml-timezones.js
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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.layer.Tile');
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goog.require('ol.layer.Vector');
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goog.require('ol.source.KML');
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goog.require('ol.source.Stamen');
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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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/*
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* Compute the style of the feature. Here we want the opacity of polygons to
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* be based on the offset from local noon. For example, a timezone where it is
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* currently noon would have an opacity of 0.75. And a timezone where it is
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* currently midnight would have an opacity of 0. This doesn't account for
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* daylight savings, so don't use it to plan your vacation.
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*/
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var styleFunction = function(feature, resolution) {
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var offset = 0;
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var name = feature.get('name'); // e.g. GMT -08:30
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var match = name.match(/([\-+]\d{2}):(\d{2})$/);
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if (match) {
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var hours = parseInt(match[1], 10);
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var minutes = parseInt(match[2], 10);
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offset = 60 * hours + minutes;
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}
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var date = new Date();
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var local = new Date(date.getTime() +
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(date.getTimezoneOffset() + offset) * 60000);
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// offset from local noon (in hours)
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var delta = Math.abs(12 - local.getHours() + (local.getMinutes() / 60));
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if (delta > 12) {
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delta = 24 - delta;
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}
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var opacity = 0.75 * (1 - delta / 12);
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return [new ol.style.Style({
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fill: new ol.style.Fill({
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color: [0xff, 0xff, 0x33, opacity]
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}),
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stroke: new ol.style.Stroke({
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color: '#ffffff'
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})
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})];
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};
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var vector = new ol.layer.Vector({
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source: new ol.source.KML({
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url: 'data/kml/timezones.kml'
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}),
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styleFunction: styleFunction
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});
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var raster = new ol.layer.Tile({
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source: new ol.source.Stamen({
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layer: 'toner'
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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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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 info = $('#info');
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info.tooltip({
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animation: false,
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trigger: 'manual'
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});
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var displayFeatureInfo = function(evt) {
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var pixel = map.getEventPixel(evt.originalEvent);
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info.css({
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left: pixel[0] + 'px',
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top: (pixel[1] - 15) + 'px'
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});
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var feature = map.forEachFeatureAtPixel(pixel, function(feature, layer) {
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return feature;
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});
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if (feature) {
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info.tooltip('hide')
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.attr('data-original-title', feature.get('name'))
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.tooltip('fixTitle')
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.tooltip('show');
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} else {
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info.tooltip('hide');
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}
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};
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$(map.getViewport()).on('mousemove', function(evt) {
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displayFeatureInfo(evt);
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});
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map.on('singleclick', function(evt) {
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displayFeatureInfo(evt);
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});
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