218 lines
7.2 KiB
HTML
218 lines
7.2 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<title>Guide | CARTO</title>
|
|
<meta name="viewport" content="initial-scale=1.0">
|
|
<meta charset="utf-8">
|
|
<link href="https://fonts.googleapis.com/css?family=Montserrat:400,600,700|Open+Sans:300,400,600" rel="stylesheet">
|
|
<!-- Include Leaflet -->
|
|
<script src="https://unpkg.com/leaflet/dist/leaflet.js"></script>
|
|
<link href="https://unpkg.com/leaflet/dist/leaflet.css" rel="stylesheet">
|
|
<!-- Include CARTO.js -->
|
|
<script src="../../../dist/public/carto.js"></script>
|
|
<link href="../style.css" rel="stylesheet">
|
|
</head>
|
|
<body>
|
|
<div id="map"></div>
|
|
<aside class="toolbox">
|
|
<div class="box">
|
|
<header>
|
|
<h1>Guide</h1>
|
|
<button class="github-logo js-source-link"></button>
|
|
</header>
|
|
<section>
|
|
<p class="description open-sans">Full reference guide example.</p>
|
|
<div class="separator"></div>
|
|
<section class="usage">
|
|
<header>USAGE</header>
|
|
<p class="open-sans">Select a country</p>
|
|
</section>
|
|
<div id="controls">
|
|
<h2 class="h2">European countries</h2>
|
|
<select class="js-countries">
|
|
<option value="">All</option>
|
|
</select>
|
|
<div id="info"></div>
|
|
</div>
|
|
</section>
|
|
<footer class="js-footer"></footer>
|
|
</div>
|
|
|
|
<div class="box widget">
|
|
<h2 class="h2">Average population</h2>
|
|
<p class="result open-sans"><span class="js-average-population">xxx</span> <small>inhabitants</small></p>
|
|
</div>
|
|
</aside>
|
|
|
|
<script>
|
|
// 1. Setting up the Leaflet Map
|
|
// 1.1 Creating the Leaflet Map
|
|
const map = L.map('map').setView([50, 15], 4);
|
|
map.scrollWheelZoom.disable();
|
|
|
|
// 1.2 Adding basemap and labels layers
|
|
// Adding Voyager Basemap
|
|
L.tileLayer('https://{s}.basemaps.cartocdn.com/rastertiles/voyager_nolabels/{z}/{x}/{y}.png', {
|
|
maxZoom: 18
|
|
}).addTo(map);
|
|
|
|
// Adding Voyager Labels
|
|
L.tileLayer('https://{s}.basemaps.cartocdn.com/rastertiles/voyager_only_labels/{z}/{x}/{y}.png', {
|
|
maxZoom: 18,
|
|
zIndex: 10
|
|
}).addTo(map);
|
|
|
|
// 2 Defining a carto.Client
|
|
const client = new carto.Client({
|
|
apiKey: 'default_public',
|
|
username: 'cartojs-test'
|
|
});
|
|
|
|
// 3. Displaying countries and cities on the map
|
|
// 3.1 Defining the layers
|
|
// European Countries layer
|
|
const europeanCountriesDataset = new carto.source.Dataset('ne_adm0_europe');
|
|
const europeanCountriesStyle = new carto.style.CartoCSS(`
|
|
#layer {
|
|
polygon-fill: #826DBA;
|
|
polygon-opacity: 0.5;
|
|
::outline {
|
|
line-width: 1;
|
|
line-color: #FFFFFF;
|
|
line-opacity: 0.5;
|
|
}
|
|
}
|
|
`);
|
|
const europeanCountries = new carto.layer.Layer(europeanCountriesDataset, europeanCountriesStyle);
|
|
|
|
// Europe cities layer
|
|
const populatedPlacesSource = new carto.source.SQL(`
|
|
SELECT *
|
|
FROM ne_10m_populated_places_simple
|
|
WHERE adm0name IN (SELECT admin FROM ne_adm0_europe)
|
|
`);
|
|
const populatedPlacesStyle = new carto.style.CartoCSS(`
|
|
#layer {
|
|
marker-width: 7;
|
|
marker-fill: #EE4D5A;
|
|
marker-fill-opacity: 0.9;
|
|
marker-line-width: 0.5;
|
|
marker-line-color: #FFFFFF;
|
|
marker-line-opacity: 1;
|
|
marker-type: ellipse;
|
|
marker-allow-overlap: false;
|
|
}
|
|
`);
|
|
const populatedPlaces = new carto.layer.Layer(populatedPlacesSource, populatedPlacesStyle, {
|
|
featureOverColumns: ['name']
|
|
});
|
|
|
|
// 3.2 Adding the layers to the client
|
|
client.addLayers([europeanCountries, populatedPlaces]);
|
|
|
|
// 3.3. Adding the layers to the map
|
|
client.getLeafletLayer().addTo(map);
|
|
|
|
// 4. Setting up tooltips
|
|
// 4.1 Showing the tooltip when user mouses over a city
|
|
const popup = L.popup({ closeButton: false });
|
|
populatedPlaces.on('featureOver', featureEvent => {
|
|
popup.setLatLng(featureEvent.latLng);
|
|
if (!popup.isOpen()) {
|
|
popup.setContent(featureEvent.data.name);
|
|
popup.openOn(map);
|
|
}
|
|
});
|
|
|
|
// 4.2 Hiding the tooltip
|
|
populatedPlaces.on('featureOut', featureEvent => {
|
|
popup.removeFrom(map);
|
|
});
|
|
|
|
// 5 Creating a formula widget
|
|
// 5.1 Defining a formula dataview
|
|
const averagePopulation = new carto.dataview.Formula(populatedPlacesSource, 'pop_max', {
|
|
operation: carto.operation.AVG
|
|
});
|
|
|
|
// 5.2 Listening to data changes on the dataview
|
|
averagePopulation.on('dataChanged', data => {
|
|
refreshAveragePopulationWidget(data.result);
|
|
});
|
|
|
|
function refreshAveragePopulationWidget(avgPopulation) {
|
|
const widgetDom = document.querySelector('.box.widget');
|
|
const averagePopulationDom = widgetDom.querySelector('.js-average-population');
|
|
averagePopulationDom.innerText = Math.floor(avgPopulation);
|
|
}
|
|
|
|
// 5.3 Adding the dataview to the client
|
|
client.addDataview(averagePopulation);
|
|
|
|
// 6 Creating a country selector widget
|
|
// 6.1 Defining a category dataview
|
|
const countriesDataview = new carto.dataview.Category(europeanCountriesDataset, 'admin', {
|
|
limit: 100
|
|
});
|
|
|
|
// 6.2 Listening to data changes on the dataview
|
|
countriesDataview.on('dataChanged', data => {
|
|
const countryNames = data.categories.map(category => category.name).sort();
|
|
refreshCountriesWidget(countryNames);
|
|
});
|
|
|
|
function refreshCountriesWidget(adminNames) {
|
|
const asideElement = document.querySelector('aside.toolbox');
|
|
const countriesDom = asideElement.querySelector('.js-countries');
|
|
countriesDom.onchange = event => {
|
|
const admin = event.target.value;
|
|
highlightCountry(admin);
|
|
filterPopulatedPlacesByCountry(admin);
|
|
};
|
|
|
|
// Fill in the list of countries
|
|
adminNames.forEach(admin => {
|
|
const option = document.createElement('option');
|
|
option.innerHTML = admin;
|
|
option.value = admin;
|
|
countriesDom.appendChild(option);
|
|
});
|
|
}
|
|
|
|
function highlightCountry(admin) {
|
|
let cartoCSS = `
|
|
#layer {
|
|
polygon-fill: #826DBA;
|
|
polygon-opacity: 0.5;
|
|
::outline {
|
|
line-width: 1;
|
|
line-color: #FFFFFF;
|
|
line-opacity: 0.5;
|
|
}
|
|
}
|
|
`;
|
|
if (admin) {
|
|
cartoCSS = `
|
|
${cartoCSS}
|
|
#layer[admin!='${admin}'] {
|
|
polygon-fill: #e5e5e5;
|
|
}
|
|
`;
|
|
}
|
|
europeanCountriesStyle.setContent(cartoCSS);
|
|
}
|
|
|
|
function filterPopulatedPlacesByCountry(admin) {
|
|
const query = admin
|
|
? `SELECT * FROM ne_10m_populated_places_simple WHERE adm0name='${admin}'`
|
|
: 'SELECT * FROM ne_10m_populated_places_simple WHERE adm0name IN (SELECT admin FROM ne_adm0_europe)';
|
|
|
|
populatedPlacesSource.setQuery(query);
|
|
}
|
|
|
|
// 6.3 Adding the dataview to the client
|
|
client.addDataview(countriesDataview);
|
|
</script>
|
|
</body>
|
|
</html>
|