<script type="text/javascript">
(function($) {
/*
*  new_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 offsetCenter(map, latlng, offsetx, offsety) {

    var scale = Math.pow(2, map.getZoom());

    var worldCoordinateCenter = map.getProjection().fromLatLngToPoint(latlng);
    var pixelOffset = new google.maps.Point((offsetx/scale) || 0,(offsety/scale) ||0)

    var worldCoordinateNewCenter = new google.maps.Point(
        worldCoordinateCenter.x - pixelOffset.x,
        worldCoordinateCenter.y + pixelOffset.y
    );

    var newCenter = map.getProjection().fromPointToLatLng(worldCoordinateNewCenter);

    map.setCenter(newCenter);

}

function new_map( $el ) {

    // var
    var $markers = $el.find('.marker');


    // vars
    var args = {
        zoom        : 16, //default zoom
        center      : new google.maps.LatLng(0, 0),
        mapTypeControl: false, //disable map view
        streetViewControl: false, //disable street view
        mapTypeId   : google.maps.MapTypeId.SATELLITE
    };


    // create map
    var map = new google.maps.Map( $el[0], args);


    // add a markers reference
    map.markers = [];


    // add markers
    $markers.each(function(index){

        add_marker( $(this), map, index);

    });


  // center map based on all markers
  //center_map( map );

  // center map to first marker position
  center_map_first_marker(map)

    // return
    return 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, index ) {
    // var
    var latlng = new google.maps.LatLng( $marker.attr('data-lat'), $marker.attr('data-lng') );
  var eventType = is_touch_device() ? 'click' : 'mouseover';

    // if marker contains HTML, add it to an infoWindow
    if( $marker.html() ) {
    var infowindow = new google.maps.InfoWindow({ content: $marker.html()});
    var marker = new google.maps.Marker({
      position: latlng,
      map: map<?php if( $default_marker_icon ): ?>,
      icon:  '<?php echo $default_marker_icon; ?>'<?php endif; ?>,
      infowindow: infowindow
    });
        // show info window when marker is hovered over
        google.maps.event.addListener(marker, eventType, function() {
      hideAllInfoWindows(map);
            this.infowindow.open( map, marker );
        });

    if (index === 0 ) {
            marker.infowindow.open( map, marker );
    }

    } else {
    var marker = new google.maps.Marker({
      position  : latlng,
      map           : map<?php if( $default_marker_icon ): ?>,
      icon:  '<?php echo $default_marker_icon; ?>'<?php endif; ?>
    });
  }

  // add to array
  map.markers.push( marker );

}

function hideAllInfoWindows(map) {
  map.markers.forEach(function(marker) {
    if (!!marker.infowindow) {
      marker.infowindow.close(map, marker);
    }
  });
}






/*
*  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 ); //zoom for single marker case, if you use perv function
    }
    else
    {
        // fit to bounds
        map.fitBounds( bounds );
    }
}

function center_map_first_marker( map ) {
  // vars
  if( map.markers.length) {
    var marker = map.markers[0];
    var latlng = new google.maps.LatLng( marker.position.lat(), marker.position.lng() );
    // set center of map
    //   map.setCenter( latlng );
      offsetCenter(map, latlng, 0 200);
      map.setZoom( 14 );

  }
}

function is_touch_device() {
 return (('ontouchstart' in window)
      || (navigator.MaxTouchPoints > 0)
      || (navigator.msMaxTouchPoints > 0));
}

/*
*  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
*/
// global var
var map = null;

$(document).ready(function(){

    $('.acf-map').each(function(){

        // create map
        map = new_map( $(this) );

    });

});

})(jQuery);
</script>