Map Facet

This add-on generates a map to display geocoded results. It can also filter results by showing only results within the map bounds.

Usage

This add-on generates a Map facet type, which works just like any other facet type.

The Data Source should be a custom field containing a comma-separated latitude, longitude.

Advanced Custom Fields has a Google Maps field type that provides geolocation. For the facet’s Data Source, choose the field underneath the “Advanced Custom Fields” header.

WP Job Manager plugin automatically stores geolocation data. Set the facet’s Data Source to geolocation_lat.

Marker content

Enter display code for the content that displays when a marker is selected. The following example outputs the title, link, and excerpt.

<h3>
  <a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>">
    <?php the_title(); ?>
  </a>
</h3>
<?php the_excerpt(); ?>

Available options

Name	Description
Other data source	Choose a longitude field if stored separately from the latitude
Map Design	Choose a design/color scheme for the map
Marker clustering	This option will group markers into clusters
Ajax marker content	Enable to load marker content via AJAX. Works best for maps with *many* markers, since it prevents all the marker content from loading all at once
Marker limit	“Show all results” will show all markers that match the results, “Show current page results” will only display markers matching the results on the current page of paginated results
Map width / height	Width and height of map. Use unitless for px, ex. 300, or with %, ex. 100%
Zoom min / max	Set the zoom bounds between 1 (minimum zoom) and 20 (maximum zoom)
Default lat / lng / zoom	Centers map to this location when there’s no map results

Using a Google Maps API Key

The map facet requires a valid Google Maps API key. After generating an API key, add it to Settings > Facet > Settings. Both the proximity facet and map facet will use this key.

Changing the map type

The following sets the default map type to Terrain:

add_filter( 'facetwp_map_init_args', function ( $args ) {
    $args['init']['mapTypeId'] = 'terrain'; // roadmap, satellite, hybrid, or terrain
    return $args;
});

Customizing the marker pins

add_filter( 'facetwp_map_marker_args', function( $args, $post_id ) {
    $args['icon'] = 'https://URL/TO/marker.png';
    return $args;
}, 10, 2 );

For more flexibility, you could alternatively use arrays to mimic Google’s JS objects:

add_filter( 'facetwp_map_marker_args', function( $args, $post_id ) {
    $args['icon'] = [
        'url' => 'https://URL/TO/YOUR/marker.png',
        'scaledSize' => [
            'width' => 16,
            'height' => 16
        ]
    ];
    return $args;
}, 10, 2 );

Map marker hooks

FacetWP provides javascript hooks to perform actions when markers are interacted with.

FWP.hooks.addAction('facetwp_map/marker/click', function(marker) {
    /**
     * The post ID associated with the active marker
     */
    var post_id = marker.post_id;
    /**
     * The following code adds the CSS class "is-active" to the active post,
     * assuming each result's HTML is structured similarly to:
     * <div class="post-item" data-id="123">Hello World!</div>
     */
    $('.post-item').removeClass('is-active');
    $('.post-item[data-id="' + post_id + '"]').addClass('is-active');
});

In addition to click, FacetWP also supports mouseover and mouseout events.

On the flip side, if you want to find all markers associated with a POST_ID, you could use:

var markers = FWP_MAP.get_post_markers(THE_POST_ID);

More examples