111 lines
3.1 KiB
HTML
111 lines
3.1 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>Layer selector example | CartoDB.js</title>
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<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
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<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
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<link rel="shortcut icon" href="https://carto.com/favicon.ico" />
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<style>
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html, body, #map {
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height: 100%;
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padding: 0;
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margin: 0;
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}
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#layer_selector {
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position: absolute;
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top: 20px;
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right: 20px;
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padding: 0;
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}
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#layer_selector ul {
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padding: 0; margin: 0;
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list-style-type: none;
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}
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#layer_selector li {
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border-bottom: 1px solid #999;
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padding: 15px 30px;
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font-family: "Helvetica", Arial;
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font-size: 13px;
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color: #444;
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cursor: auto;
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}
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#layer_selector li:hover {
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background-color: #F0F0F0;
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cursor: pointer;
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}
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#layer_selector li.selected {
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background-color: #EEE;
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}
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</style>
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<link rel="stylesheet" href="https://libs.cartocdn.com/cartodb.js/v3/3.15/themes/css/cartodb.css" />
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</head>
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<body>
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<div id="map"></div>
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<div id="layer_selector" class="cartodb-infobox">
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<ul>
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<li data="all" class="selected">All countries</li>
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<li data="1000">area >1000 km<sup>2</sup></li>
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<li data="6000">area >6000 km<sup>2</sup></li>
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<li data="10000">area >10000 km<sup>2</sup></li>
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<li data="50000">area >50000 km<sup>2</sup></li>
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</ul>
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</div>
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<!-- include cartodb.js library -->
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<script src="https://libs.cartocdn.com/cartodb.js/v3/3.15/cartodb.js"></script>
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<script>
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// create layer selector
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function createSelector(layer) {
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var sql = new cartodb.SQL({ user: 'documentation' });
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var $options = $('#layer_selector li');
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$options.click(function(e) {
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// get the area of the selected layer
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var $li = $(e.target);
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var area = $li.attr('data');
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// deselect all and select the clicked one
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$options.removeClass('selected');
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$li.addClass('selected');
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// create query based on data from the layer
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var query = "select * from european_countries_e";
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if(area !== 'all') {
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query = "select * from european_countries_e where area > " + area;
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}
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// change the query in the layer to update the map
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layer.setSQL(query);
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});
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}
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function main() {
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cartodb.createVis('map', 'https://documentation.cartodb.com/api/v2/viz/2b13c956-e7c1-11e2-806b-5404a6a683d5/viz.json', {
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tiles_loader: true,
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center_lat: 50,
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center_lon: 20,
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zoom: 3
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})
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.done(function(vis, layers) {
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// layer 0 is the base layer, layer 1 is cartodb layer
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var subLayer = layers[1].getSubLayer(0);
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createSelector(subLayer);
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})
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.error(function(err) {
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console.log(err);
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});
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}
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window.onload = main;
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</script>
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</body>
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</html>
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