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var marker;

var locations = [

["6", "43.683", "9.58", "3002: Location 1", 1, true],

["7", "45.149", "9.44", "3003: Location", 2, false]

];

var markerShadow;

var infowindow = new google.maps.InfoWindow();

function initialize() {

var mapProp = {

center: new google.maps.LatLng(43.683, 9.44),

zoom: 5,

mapTypeId: google.maps.MapTypeId.ROADMAP

};

var map = new google.maps.Map(document.getElementById("googleMap"), mapProp);

var iconShadow = {

url: 'http://www.geocodezip.com/mapIcons/marker_shadow.png',

// The shadow image is larger in the horizontal dimension

// while the position and offset are the same as for the main image.

size: new google.maps.Size(37, 34),

origin: new google.maps.Point(0, 0),

anchor: new google.maps.Point(10, 34)

};

for (i = 0; i < locations.length; i++) {

marker = new google.maps.Marker({

position: new google.maps.LatLng(locations[i][1], locations[i][2]),

icon: 'https://maps.gstatic.com/mapfiles/ms2/micons/purple.png',

title: locations[i][3]

});

google.maps.event.addListener(marker, 'click', (function(marker, i) {

return function() {

if (markerShadow && markerShadow.setPosition) {

if (markerShadow && markerShadow.setMap) {

markerShadow.setPosition(this.getPosition());

markerShadow.setMap(null);

markerShadow = new MarkerShadow(marker.getPosition(), iconShadow, map);

} else if (!markerShadow) {

markerShadow = new MarkerShadow(marker.getPosition(), iconShadow, map);

}

})(marker, i));

marker.setMap(map);

}

google.maps.event.addDomListener(window, 'load', initialize);

// marker shadow code

MarkerShadow.prototype = new google.maps.OverlayView();

MarkerShadow.prototype.setPosition = function(latlng) {

/** @constructor */

this.posn_ = latlng;

this.draw();

}

/** @constructor */

function MarkerShadow(position, options, map) {

// Initialize all properties.

this.posn_ = position;

this.map_ = map;

if (typeof(options) == "string") {

this.image = options;

} else {

this.options_ = options;

if (!!options.size) this.size_ = options.size;

if (!!options.url) this.image_ = options.url;

}

// Define a property to hold the image's div. We'll

// actually create this div upon receipt of the onAdd()

// method so we'll leave it null for now.

this.div_ = null;

// Explicitly call setMap on this overlay.

this.setMap(map);

}

/**

* onAdd is called when the map's panes are ready and the overlay has been

* added to the map.

MarkerShadow.prototype.onAdd = function() {

// if no url, return, nothing to do.

if (!this.image_) return;

var div = document.createElement('div');

div.style.borderStyle = 'none';

div.style.borderWidth = '0px';

div.style.position = 'absolute';

// Create the img element and attach it to the div.

var img = document.createElement('img');

img.src = this.image_;

img.style.width = this.options_.size.x + 'px';

img.style.height = this.options_.size.y + 'px';

img.style.position = 'absolute';

div.appendChild(img);

this.div_ = div;

// Add the element to the "overlayLayer" pane.

var panes = this.getPanes();

panes.overlayShadow.appendChild(div);

};

MarkerShadow.prototype.draw = function() {

// if no url, return, nothing to do.

if (!this.image_) return;

// We use the coordinates of the overlay to peg it to the correct position

// To do this, we need to retrieve the projection from the overlay.

var overlayProjection = this.getProjection();

var posn = overlayProjection.fromLatLngToDivPixel(this.posn_);

// Resize the image's div to fit the indicated dimensions.

if (!this.div_) return;

var div = this.div_;

if (!!this.options_.anchor) {

div.style.left = Math.floor(posn.x - this.options_.anchor.x) + 'px';

div.style.top = Math.floor(posn.y - this.options_.anchor.y) + 'px';

}

if (!!this.options_.size) {

div.style.width = this.size_.x + 'px';

div.style.height = this.size_.y + 'px';

}

};

// The onRemove() method will be called automatically from the API if

// we ever set the overlay's map property to 'null'.

MarkerShadow.prototype.onRemove = function() {

if (!this.div_) return;

this.div_.parentNode.removeChild(this.div_);

this.div_ = null;

};

html,

body,

#googleMap {

height: 100%;

width: 100%;

margin: 0px;

padding: 0px

}

Saved diffs

Original text

Open file

var marker;
var locations = [
  ["6", "43.683", "9.58", "3002: Location 1", 1, true],
  ["7", "45.149", "9.44", "3003: Location", 2, false]
];
var markerShadow;
var infowindow = new google.maps.InfoWindow();

function initialize() {
  var mapProp = {
    center: new google.maps.LatLng(43.683, 9.44),
    zoom: 5,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };

var map = new google.maps.Map(document.getElementById("googleMap"), mapProp);
  var iconShadow = {
    url: 'http://www.geocodezip.com/mapIcons/marker_shadow.png',
    // The shadow image is larger in the horizontal dimension
    // while the position and offset are the same as for the main image.
    size: new google.maps.Size(37, 34),
    origin: new google.maps.Point(0, 0),
    anchor: new google.maps.Point(10, 34)
  };

for (i = 0; i < locations.length; i++) {
    marker = new google.maps.Marker({
      position: new google.maps.LatLng(locations[i][1], locations[i][2]),
      icon: 'https://maps.gstatic.com/mapfiles/ms2/micons/purple.png',
      title: locations[i][3]
    });
    google.maps.event.addListener(marker, 'click', (function(marker, i) {
      return function() {
        if (markerShadow && markerShadow.setPosition) {
          markerShadow.setPosition(this.getPosition());
        } else if (!markerShadow) {
          markerShadow = new MarkerShadow(marker.getPosition(), iconShadow, map);
        }
      }
    })(marker, i));

marker.setMap(map);
  }
}

google.maps.event.addDomListener(window, 'load', initialize);

// marker shadow code
MarkerShadow.prototype = new google.maps.OverlayView();
MarkerShadow.prototype.setPosition = function(latlng) {
    this.posn_ = latlng;
    this.draw();
  }
  /** @constructor */

function MarkerShadow(position, options, map) {

// Initialize all properties.
    this.posn_ = position;
    this.map_ = map;
    if (typeof(options) == "string") {
      this.image = options;
    } else {
      this.options_ = options;
      if (!!options.size) this.size_ = options.size;
      if (!!options.url) this.image_ = options.url;
    }

// Define a property to hold the image's div. We'll
    // actually create this div upon receipt of the onAdd()
    // method so we'll leave it null for now.
    this.div_ = null;

// Explicitly call setMap on this overlay.
    this.setMap(map);
  }
  /**
   * onAdd is called when the map's panes are ready and the overlay has been
   * added to the map.
   */
MarkerShadow.prototype.onAdd = function() {
  // if no url, return, nothing to do.
  if (!this.image_) return;
  var div = document.createElement('div');
  div.style.borderStyle = 'none';
  div.style.borderWidth = '0px';
  div.style.position = 'absolute';

// Create the img element and attach it to the div.
  var img = document.createElement('img');
  img.src = this.image_;
  img.style.width = this.options_.size.x + 'px';
  img.style.height = this.options_.size.y + 'px';
  img.style.position = 'absolute';
  div.appendChild(img);

this.div_ = div;

// Add the element to the "overlayLayer" pane.
  var panes = this.getPanes();
  panes.overlayShadow.appendChild(div);
};

MarkerShadow.prototype.draw = function() {
  // if no url, return, nothing to do.
  if (!this.image_) return;
  // We use the coordinates of the overlay to peg it to the correct position 
  // To do this, we need to retrieve the projection from the overlay.
  var overlayProjection = this.getProjection();

var posn = overlayProjection.fromLatLngToDivPixel(this.posn_);

// Resize the image's div to fit the indicated dimensions.
  if (!this.div_) return;
  var div = this.div_;
  if (!!this.options_.anchor) {
    div.style.left = Math.floor(posn.x - this.options_.anchor.x) + 'px';
    div.style.top = Math.floor(posn.y - this.options_.anchor.y) + 'px';
  }
  if (!!this.options_.size) {
    div.style.width = this.size_.x + 'px';
    div.style.height = this.size_.y + 'px';
  }
};

// The onRemove() method will be called automatically from the API if
// we ever set the overlay's map property to 'null'.
MarkerShadow.prototype.onRemove = function() {
  if (!this.div_) return;
  this.div_.parentNode.removeChild(this.div_);
  this.div_ = null;
};
html,
body,
#googleMap {
  height: 100%;
  width: 100%;
  margin: 0px;
  padding: 0px
}
<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="googleMap"></div>

Changed text

Open file

var marker;
var locations = [
  ["6", "43.683", "9.58", "3002: Location 1", 1, true],
  ["7", "45.149", "9.44", "3003: Location", 2, false]
];
var markerShadow;

function initialize() {
  var mapProp = {
    center: new google.maps.LatLng(43.683, 9.44),
    zoom: 5,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };

for (i = 0; i < locations.length; i++) {
    marker = new google.maps.Marker({
      position: new google.maps.LatLng(locations[i][1], locations[i][2]),
      icon: 'https://maps.gstatic.com/mapfiles/ms2/micons/purple.png',
      title: locations[i][3]
    });
    google.maps.event.addListener(marker, 'click', (function(marker, i) {
      return function() {
        if (markerShadow && markerShadow.setMap) {
          markerShadow.setMap(null);
          markerShadow = new MarkerShadow(marker.getPosition(), iconShadow, map);
        } else if (!markerShadow) {
          markerShadow = new MarkerShadow(marker.getPosition(), iconShadow, map);
        }
      }
    })(marker, i));

marker.setMap(map);
  }
}

google.maps.event.addDomListener(window, 'load', initialize);

// marker shadow code
MarkerShadow.prototype = new google.maps.OverlayView();
/** @constructor */
function MarkerShadow(position, options, map) {

// Define a property to hold the image's div. We'll
    // actually create this div upon receipt of the onAdd()
    // method so we'll leave it null for now.
    this.div_ = null;

this.div_ = div;

// Add the element to the "overlayLayer" pane.
  var panes = this.getPanes();
  panes.overlayShadow.appendChild(div);
};

var posn = overlayProjection.fromLatLngToDivPixel(this.posn_);