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@ramiroaznar
Last active September 30, 2016 11:30
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Dropdown menu selector layer with CARTO.js
<!DOCTYPE html>
<html>
<head>
<title>Dropdown menu selector layer with CARTO.js</title>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<style>
html, body, #map {
height: 100%;
padding: 0;
margin: 0;
}
#selector_menu{
position: absolute;
top: 20px;
left: 20px;
z-index: 9000;
}
</style>
<!-- include cartodb css -->
<link rel="stylesheet" href="http://libs.cartocdn.com/cartodb.js/v3/3.15/themes/css/cartodb.css" />
<!-- include cartodb.js library -->
<script src="http://libs.cartocdn.com/cartodb.js/v3/3.15/cartodb.js"></script>
</head>
<body>
<div id='map'></div>
<!--- layer selector -->
<div id='selector_menu'>
<select id='selector'>
<option value='reset'>All cities</option>
<option value='spain'>Spain</option>
<option value = 'france'>France</option>
<option value='portugal'>Portugal</option>
<option value = 'italy'>Italy</option>
<option value='germany'>Germany</option>
<option value = 'uk'>United Kingdom</option>
<option value='ireland'>Ireland</option>
</select>
</div>
<script>
function init(){
// declare a sublayer variable
var sublayer;
// create leaflet map and define some properties
var map = L.map('map', {
zoomControl: false,
center: [43, 0],
zoom: 5
})
// add a base layer to map
L.tileLayer('http://{s}.basemaps.cartocdn.com/dark_nolabels/{z}/{x}/{y}.png', {
attribution: 'CARTO'
}).addTo(map);
// create a variable from CARTO vizjson
var layerUrl = 'https://team.carto.com/u/ramirocartodb/api/v2/viz/5df3bb60-86e7-11e6-a93d-0ecd1babdde5/viz.json' ;
// create a visualization using map & vizjson variables
cartodb.createLayer(map,layerUrl)
.addTo(map)
.on('done', function(layer){
sublayer = layer.getSubLayer(0);
// define layer actions
var LayerActions = {
reset: function(){
sublayer.setSQL("SELECT * FROM populated_places");
},
spain: function(){
sublayer.setSQL("SELECT * FROM populated_places WHERE adm0name ilike 'spain'");
return true;
},
france: function(){
sublayer.setSQL("SELECT * FROM populated_places WHERE adm0name ilike 'france'");
return true;
},
portugal: function(){
sublayer.setSQL("SELECT * FROM populated_places WHERE adm0name ilike 'portugal'");
return true;
},
italy: function(){
sublayer.setSQL("SELECT * FROM populated_places WHERE adm0name ilike 'italy'");
return true;
},
germany: function(){
sublayer.setSQL("SELECT * FROM populated_places WHERE adm0name ilike 'germany'");
return true;
},
uk: function(){
sublayer.setSQL("SELECT * FROM populated_places WHERE adm0name ilike 'United Kingdom'");
return true;
},
ireland: function(){
sublayer.setSQL("SELECT * FROM populated_places WHERE adm0name ilike 'ireland'");
return true;
}
}
// get selector with JQuery and set layer actions
$('#selector').change(function() {
LayerActions[$(this).val()]();
});
});
}
window.onload = init;
</script>
</body>
</html>
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