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Merge pull request #831 from tschaub/kml-example

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Nicer KML example
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Tim Schaub
2013-06-27 14:38:57 -07:00
parent 445f85b3e2 a2bc986785
commit cd14753495
3 changed files with 1799 additions and 0 deletions
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="chrome=1">
<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="../resources/layout.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap-responsive.min.css" type="text/css">
<title>Timezones in KML</title>
<style>
#map {
position: relative;
}
#info {
position: absolute;
height: 1px;
width: 1px;
z-index: 100;
}
</style>
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="navbar-inner">
<div class="container">
<a class="brand" href="./">OpenLayers 3 Examples</a>
<ul class="nav pull-right">
<li><iframe class="github-watch-button" src="http://ghbtns.com/github-btn.html?user=openlayers&repo=ol3&type=watch&count=true"
allowtransparency="true" frameborder="0" scrolling="0" height="20" width="90"></iframe></li>
<li><a href="https://twitter.com/share" class="twitter-share-button" data-count="none" data-hashtags="openlayers">&nbsp;</a></li>
<li><div class="g-plusone-wrapper"><div class="g-plusone" data-size="medium" data-annotation="none"></div></div></li>
</ul>
</div>
</div>
</div>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div id="map" class="map"><div id="info"></div></div>
</div>
</div>
<div class="row-fluid">
<div class="span4">
<h4 id="title">Timezones in KML</h4>
<p id="shortdesc">Demonstrates rendering timezones from KML.</p>
<div id="docs">
<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>
<p>See the <a href="kml-timezones.js" target="_blank">kml-timezones.js source</a> to see how this is done.</p>
</div>
<div id="tags">KML, vector, style</div>
</div>
</div>
</div>
<script src="jquery.min.js" type="text/javascript"></script>
<script src="../resources/bootstrap/js/bootstrap.min.js" type="text/javascript"></script>
<script src="loader.js?id=kml-timezones" type="text/javascript"></script>
<script src="../resources/social-links.js" type="text/javascript"></script>
</body>
</html>

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examples/kml-timezones.js Normal file
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goog.require('ol.Map');
goog.require('ol.RendererHint');
goog.require('ol.View2D');
goog.require('ol.expr');
goog.require('ol.layer.TileLayer');
goog.require('ol.layer.Vector');
goog.require('ol.parser.KML');
goog.require('ol.proj');
goog.require('ol.source.Stamen');
goog.require('ol.source.Vector');
goog.require('ol.style.Polygon');
goog.require('ol.style.Rule');
goog.require('ol.style.Style');
/**
* Register a function to be used in a symbolizer. Here we want the opacity
* of polygons to be based on the offset from local noon. For example, a
* timezone where it is currently noon would have an opacity of 0.75. And a
* timezone where it is currently midnight would have an opacity of 0. This
* doesn't account for daylight savings, so don't use it to plan your vacation.
*/
ol.expr.register('getOpacity', function() {
var feature = this;
var offset = 0;
var name = feature.get('name'); // e.g. GMT -08:30
var match = name.match(/([-+]\d{2}):(\d{2})$/);
if (match) {
var hours = parseInt(match[1], 10);
var minutes = parseInt(match[2], 10);
offset = 60 * hours + minutes;
}
var date = new Date();
var local = new Date(date.getTime() +
(date.getTimezoneOffset() + offset) * 60000);
// offset from local noon (in hours)
var delta = Math.abs(12 - local.getHours() + (local.getMinutes() / 60));
if (delta > 12) {
delta = 24 - delta;
}
return 0.75 * (1 - delta / 12);
});
var style = new ol.style.Style({rules: [
new ol.style.Rule({
symbolizers: [
new ol.style.Polygon({
fillColor: '#ffff33',
strokeColor: '#ffffff',
opacity: ol.expr.parse('getOpacity()')
})
]
})
]});
var vector = new ol.layer.Vector({
source: new ol.source.Vector({
projection: ol.proj.get('EPSG:4326')
}),
style: style
});
var raster = new ol.layer.TileLayer({
source: new ol.source.Stamen({
layer: 'toner'
})
});
var map = new ol.Map({
layers: [raster, vector],
renderer: ol.RendererHint.CANVAS,
target: 'map',
view: new ol.View2D({
center: [0, 0],
zoom: 2
})
});
var info = $('#info');
info.tooltip({
animation: false,
trigger: 'manual'
});
map.on(['click', 'mousemove'], function(evt) {
var pixel = evt.getPixel();
info.css({
left: pixel[0] + 'px',
top: (pixel[1] - 15) + 'px'
});
map.getFeatures({
pixel: pixel,
layers: [vector],
success: function(layerFeatures) {
var feature = layerFeatures[0][0];
if (feature) {
info.tooltip('hide')
.attr('data-original-title', feature.get('name'))
.tooltip('fixTitle')
.tooltip('show');
} else {
info.tooltip('hide');
}
}
});
});
var kml = new ol.parser.KML({dimension: 2});
var url = 'data/kml/timezones.kml';
var xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
/**
* onload handler for the XHR request.
*/
xhr.onload = function() {
if (xhr.status == 200) {
var projection = map.getView().getProjection();
vector.parseFeatures(xhr.responseText, kml, projection);
}
};
xhr.send();