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Last active April 3, 2016 12:09
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Training: changing SQL query and CartoCSS
<!DOCTYPE html>
<html>
<head>
<title>Training | change SQL and CartoCSS | CartoDB.js</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" />
<link rel="stylesheet" href="https://cartodb-libs.global.ssl.fastly.net/cartodb.js/v3/3.15/themes/css/cartodb.css" />
<script src="https://cartodb-libs.global.ssl.fastly.net/cartodb.js/v3/3.15/cartodb.js"></script>
<style>
html,
body {
height: 100%;
padding: 0;
margin: 0;
position: relative;
}
#map {
height: 100%;
padding: 0;
margin: 0;
}
#bar {
z-index: 2;
position: absolute;
top: 0;
right: 0;
margin: 4px;
}
#boton {
width: 128px;
height: 64px;
}
</style>
<!-- layer SQL -->
<script type="text/sql" id="sql">
SELECT * FROM ne_10m_populated_places_simple
</script>
<!-- layer CartoCSS style -->
<style type="text/cartocss" id="cartocss">
#ne_10m_populated_places_simple{
marker-fill: red;
}
</style>
<style type="text/cartocss" id="cartocss_labels">
#ne_10m_populated_places_simple::labels {
text-name: [name];
text-face-name: 'DejaVu Sans Book';
text-size: 15;
text-label-position-tolerance: 10;
text-fill: #000;
text-halo-fill: #FFF;
text-halo-radius: 1;
text-dy: -10;
text-allow-overlap: false;
text-placement: point;
text-placement-type: simple;
}
</style>
</head>
<body>
<div id="map"></div>
<div id="bar">
<button id="allPop">All</button>
<button id="mostPop">20 most populated places</button>
<button id="lessPop">20 less populated places</button>
</div>
<script>
(function() {
'use strict';
$(document).ready(function() {
var sublayer
var map = L.map('map', {
zoomControl: true,
center: [40.418709, -3.703277],
zoom: 3
});
L.tileLayer('http://{s}.basemaps.cartocdn.com/light_nolabels/{z}/{x}/{y}.png', {
attribution: '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors, &copy; <a href="http://cartodb.com/attributions">CartoDB</a>'
}).addTo(map);
var layer_sql = $('#sql').html();
var layer_cartocss = $('#cartocss').html();
var labels_cartocss= $('#cartocss_labels').html();
cartodb.createLayer(map, {
user_name: 'jsanzacademy1',
filter: "mapnik",
type: 'cartodb',
sublayers: [{
sql: layer_sql,
cartocss: layer_cartocss,
interactivity: 'cartodb_id, name, pop_max'
}]
}, {
/*options here*/
})
.addTo(map)
.on('done', function(layer) {
var sublayer = layer.getSubLayer(0);
$('#allPop').on('click', function() {
sublayer.setSQL(layer_sql);
sublayer.setCartoCSS(layer_cartocss);
});
$('#mostPop').on('click', function() {
sublayer.setSQL(layer_sql + 'ORDER BY pop_max DESC LIMIT 20;');
sublayer.setCartoCSS(layer_cartocss + labels_cartocss);
});
$('#lessPop').on('click', function() {
sublayer.setSQL(layer_sql + 'ORDER BY pop_max ASC LIMIT 20;');
sublayer.setCartoCSS(layer_cartocss + labels_cartocss);
});
})
.on('error', function(e) {
console.log('error: ' + e);
});
});
})();
</script>
</body>
</html>
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