WordPress Advanced Custom Fields, Google Map, open only ONE infowindow at a time

I’m using google maps addon of Advanced Custom Fields for WordPress. I have multiple points on the map, some are very close to one another. I can open open them no problem, however I need to have one open at time. So if I open one, it closes the others. The Marker set up on click for advanced custom fields is as follows:

if( $marker.html() )
{
    // create info window
    var infowindow = new google.maps.InfoWindow({
        content     : $marker.html(),
        maxWidth: 250
    });


    google.maps.event.addListener(marker, 'click', function() {
        infowindow.open( map, marker );
    });     
}

Any help on how to append this so only one window is open at a time would be greatly appreciated

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  1. <script type="text/javascript">
    (function($) {
    
    /*
    *  render_map
    *
    *  This function will render a Google Map onto the selected jQuery element
    *
    *  @type    function
    *  @date    8/11/2013
    *  @since   4.3.0
    *
    *  @param   $el (jQuery element)
    *  @return  n/a
    */
    
    function render_map( $el ) {
    
    // var
    var $markers = $el.find('.marker');
    
    // vars
    var args = {
        zoom        : 16,
        center      : new google.maps.LatLng(0, 0),
        mapTypeId   : google.maps.MapTypeId.ROADMAP
    };
    
    // create map               
    var map = new google.maps.Map( $el[0], args);
    
    // add a markers reference
    map.markers = [];
    
    // add markers
    $markers.each(function(){
    
        add_marker( $(this), map );
    
    });
    
    // center map
    center_map( map );
    
    }
    
    // create info window outside of each - then tell that singular infowindow to swap content based on click
    var infowindow = new google.maps.InfoWindow({
    content     : '' 
    });
    
    /*
    *  add_marker
    *
    *  This function will add a marker to the selected Google Map
    *
    *  @type    function
    *  @date    8/11/2013
    *  @since   4.3.0
    *
    *  @param   $marker (jQuery element)
    *  @param   map (Google Map object)
    *  @return  n/a
    */
    
    function add_marker( $marker, map ) {
    
    // var
    var latlng = new google.maps.LatLng( $marker.attr('data-lat'), $marker.attr('data-lng') );
    
    // create marker
    var marker = new google.maps.Marker({
        position    : latlng,
        map         : map
    });
    
    // add to array
    map.markers.push( marker );
    
    // if marker contains HTML, add it to an infoWindow
    if( $marker.html() )
    {
    
        // show info window when marker is clicked & close other markers
        google.maps.event.addListener(marker, 'click', function() {
            //swap content of that singular infowindow
                    infowindow.setContent($marker.html());
                    infowindow.open(map, marker);
        });
    
        // close info window when map is clicked
             google.maps.event.addListener(map, 'click', function(event) {
                if (infowindow) {
                    infowindow.close(); }
                }); 
    
    }
    
    }
    
    /*
    *  center_map
    *
    *  This function will center the map, showing all markers attached to this map
    *
    *  @type    function
    *  @date    8/11/2013
    *  @since   4.3.0
    *
    *  @param   map (Google Map object)
    *  @return  n/a
    */
    
    function center_map( map ) {
    
    // vars
    var bounds = new google.maps.LatLngBounds();
    
    // loop through all markers and create bounds
    $.each( map.markers, function( i, marker ){
    
        var latlng = new google.maps.LatLng( marker.position.lat(), marker.position.lng() );
    
        bounds.extend( latlng );
    
    });
    
    // only 1 marker?
    if( map.markers.length == 1 )
    {
        // set center of map
        map.setCenter( bounds.getCenter() );
        map.setZoom( 16 );
    }
    else
    {
        // fit to bounds
        map.fitBounds( bounds );
    }
    
    }
    
    /*
    *  document ready
    *
    *  This function will render each map when the document is ready (page has loaded)
    *
    *  @type    function
    *  @date    8/11/2013
    *  @since   5.0.0
    *
    *  @param   n/a
    *  @return  n/a
    */
    
    $(document).ready(function(){
    
    $('.acf-map').each(function(){
    
        render_map( $(this) );
    
    });
    
    });
    
    })(jQuery);
    </script>