How to add a map with leaflet programmatically
Sometimes you would like to add a map to a node or block without the need for detailled configuration options. You simply want to display a map and be done with it.
Fortunately this is an easy task using Leaflet.
Say you have a value for the location and one for the country and would like to print this "address" in a map.
So you need to first install Leaflet and Geocoder and then use this function to generate the map:
1<?php
2/**
3 * Generate a simple map with a location pointer.
4 *
5 * @param string $location
6 * Location to use (for example the address).
7 * @param string $country
8 * Name of the country to use.
9 *
10 * @return string
11 * The rendered map.
12 */
13function mysimplemap_map_create($location, $country) {
14 $map = '';
15 // Join the address parts to something geocoder / google maps understands.
16 $address = sprintf('%s, %s', $location, $country);
17
18 // Try to create a geographic point out of the given location values.
19 if ($geo_point = geocoder('google', $address)) {
20 // Create a JSON equivalent to the point.
21 $geo_json = $geo_point->out('json');
22 // Get map implementation provided by http://drupal.org/project/leaflet_googlemaps.
23 $map = leaflet_map_get_info('google-maps-roadmap');
24 // Set initial zoom level.
25 $map['settings']['zoom'] = 16;
26
27 // Decode the JSON string.
28 $geo_data = json_decode($geo_json);
29 // Create settings for the map.
30 $map_features = array(
31 array(
32 'type' => 'point',
33 'lon' => $geo_data->coordinates[0],
34 'lat' => $geo_data->coordinates[1],
35 ),
36 );
37 // Render the map with a fixed height of 250 pixels.
38 $map = leaflet_render_map($map, $features, '250px');
39 }
40
41 return $map;
42}
43?>
Easy, isn't it?
