gmap-init.js

(function($) {
    var infoWindows = new Array();
 
/*
*  render_map
*
*  This function will render a Google Map onto the selected jQuery element
*  This version includes the auto-close infowindow - requires the var from line 2 above.
*
*  @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        : 5.75,
        center      : new google.maps.LatLng(53.5737641, -7.7804405),
        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 );
 
}
 
/*
*  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() )
    {
        // create info window
        var infoWindow = new google.maps.InfoWindow({
            content     : $marker.html()
        });

        infoWindows.push(infoWindow);

        // show info window when marker is clicked
        google.maps.event.addListener(marker, 'click', function() {

            //close all
            for (var i = 0; i < infoWindows.length; i++) {
                infoWindows[i].close();
            }
                                                                
            infoWindow.open( map, marker );
        });

        google.maps.event.addListener(map, 'click', function() {
            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( 5.75 );
    }
    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) );
    }); 
});

function close_info() {
    $('.gm-ui-hover-effect').toggle(center_map( map ));
}
 
})(jQuery);

Gmap-init.js - Renders the ACF Google Map, complete with auto close of the marker infowindow on click within the map.