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August 1, 2017 16:37
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CARTO.js | Get bbox from selected feature
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<!DOCTYPE html> | |
<html> | |
<head> | |
<title>CARTO.js | Get bbox from selected feature</title> | |
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" /> | |
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/> | |
<link rel="shortcut icon" href="http://cartodb.com/assets/favicon.ico" /> | |
<style> | |
html, body, #map { | |
height: 100%; | |
padding: 0; | |
margin: 0; | |
} | |
#infobox{ | |
width: 325px; | |
height: 150px; | |
position: absolute; | |
top: 20px; | |
left: 20px; | |
background-color: white; | |
opacity: 0.6; | |
text-align: center; | |
font-family: "Open Sans"; | |
} | |
</style> | |
<link rel="stylesheet" href="https://cartodb-libs.global.ssl.fastly.net/cartodb.js/v3/3.15/themes/css/cartodb.css" /> | |
</head> | |
<body> | |
<div id="map"></div> | |
<!-- infobox div --> | |
<div id="infobox"> | |
<h4>Click on a UK region</h4> | |
<p id="bbox-top">Bounding Box Top</p> | |
<p id="bbox-buttom">Bounding Box Buttom</p> | |
</div> | |
<script type="text/sql" id="query"> | |
SELECT | |
* | |
FROM | |
uk_administrative_regions | |
</script> | |
<script type="text/cartocss" id="style"> | |
#layer { | |
polygon-opacity: 0.5; | |
polygon-fill: ramp([region], cartocolor(Bold), category(10)); | |
line-width: 2; | |
line-color: ramp([region], cartocolor(Bold), category(10)); | |
line-opacity: 0.4; | |
line-offset: -1; | |
} | |
</script> | |
<!-- include cartodb.js library --> | |
<script src="https://cartodb-libs.global.ssl.fastly.net/cartodb.js/v3/3.15/cartodb.js"></script> | |
<script> | |
function main() { | |
var query = $("#query").text(), | |
style = $("#style").text(); | |
var map = new L.Map('map', { | |
zoomControl: false, | |
center: [54, -3], | |
zoom: 6 | |
}); | |
L.tileLayer('http://{s}.basemaps.cartocdn.com/light_nolabels/{z}/{x}/{y}.png', { | |
attribution: 'CARTO' | |
}).addTo(map); | |
cartodb.createLayer(map, { | |
user_name: 'ramirocartodb', | |
type: 'cartodb', | |
sublayers: [{ | |
sql: query, | |
cartocss: style | |
}] | |
}) | |
.addTo(map) | |
.on('done', function(layer) { | |
var sublayer = layer.getSubLayer(0); | |
// change cursor to pointer when hovering on a feature | |
sublayer.on('mouseover',function(){ | |
$('#map').css({"cursor":"pointer"}) | |
}); | |
// set layer interactivity | |
sublayer.setInteractivity("cartodb_id"); | |
sublayer.setInteraction(true); | |
sublayer.on('featureClick', function(e, pos, latlng, data) { | |
// get cartodb_id from selected feature | |
var id_selected = data.cartodb_id; | |
console.log(id_selected); | |
var sql = new cartodb.SQL({ user: 'ramirocartodb'}); | |
// get bounds from selected feature | |
sql.getBounds( | |
query + " where cartodb_id = {{cartodb_id}}", | |
{cartodb_id: id_selected}) | |
.done(function(bounds) { | |
console.log(bounds); | |
$('#bbox-top').text(bounds[0]); | |
$('#bbox-buttom').text(bounds[1]); | |
}); | |
}); | |
}).on('error', function() { | |
cartodb.log.log("Some error occurred."); | |
}); | |
} | |
// you could use $(window).load(main); | |
window.onload = main; | |
</script> | |
</body> | |
</html> |
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