// ==ClosureCompiler==
// @compilation_level ADVANCED_OPTIMIZATIONS
// @externs_url https://raw.githubusercontent.com/google/closure-compiler/master/contrib/externs/maps/google_maps_api_v3.js
// ==/ClosureCompiler==
/**
* @name MarkerClusterer for Google Maps v3
* @version version 1.0
* @author Luke Mahe
* @fileoverview
* The library creates and manages per-zoom-level clusters for large amounts of
* markers.
* <br/>
* This is a v3 implementation of the
* <a href="http://gmaps-utility-library-dev.googlecode.com/svn/tags/markerclusterer/"
* >v2 MarkerClusterer</a>.
*/
/**
* @license
* Copyright 2010 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* A Marker Clusterer that clusters markers.
*
* @param {google.maps.Map} map The Google map to attach to.
* @param {Array.<google.maps.Marker>=} opt_markers Optional markers to add to
* the cluster.
* @param {Object=} opt_options support the following options:
* 'gridSize': (number) The grid size of a cluster in pixels.
* 'maxZoom': (number) The maximum zoom level that a marker can be part of a
* cluster.
* 'zoomOnClick': (boolean) Whether the default behaviour of clicking on a
* cluster is to zoom into it.
* 'averageCenter': (boolean) Whether the center of each cluster should be
* the average of all markers in the cluster.
* 'minimumClusterSize': (number) The minimum number of markers to be in a
* cluster before the markers are hidden and a count
* is shown.
* 'styles': (object) An object that has style properties:
* 'url': (string) The image url.
* 'height': (number) The image height.
* 'width': (number) The image width.
* 'anchor': (Array) The anchor position of the label text.
* 'textColor': (string) The text color.
* 'textSize': (number) The text size.
* 'backgroundPosition': (string) The position of the backgound x, y.
* 'iconAnchor': (Array) The anchor position of the icon x, y.
* @constructor
* @extends google.maps.OverlayView
*/
function MarkerClusterer(map, opt_markers, opt_options) {
// MarkerClusterer implements google.maps.OverlayView interface. We use the
// extend function to extend MarkerClusterer with google.maps.OverlayView
// because it might not always be available when the code is defined so we
// look for it at the last possible moment. If it doesn't exist now then
// there is no point going ahead :)
this.extend(MarkerClusterer, google.maps.OverlayView);
this.map_ = map;
/**
* @type {Array.<google.maps.Marker>}
* @private
*/
this.markers_ = [];
/**
* @type {Array.<Cluster>}
*/
this.clusters_ = [];
this.sizes = [53, 56, 66, 78, 90];
/**
* @private
*/
this.styles_ = [];
/**
* @type {boolean}
* @private
*/
this.ready_ = false;
var options = opt_options || {};
/**
* @type {number}
* @private
*/
this.gridSize_ = options['gridSize'] || 60;
/**
* @private
*/
this.minClusterSize_ = options['minimumClusterSize'] || 2;
/**
* @type {?number}
* @private
*/
this.maxZoom_ = options['maxZoom'] || null;
this.styles_ = options['styles'] || [];
/**
* @type {string}
* @private
*/
this.imagePath_ = options['imagePath'] ||
this.MARKER_CLUSTER_IMAGE_PATH_;
/**
* @type {string}
* @private
*/
this.imageExtension_ = options['imageExtension'] ||
this.MARKER_CLUSTER_IMAGE_EXTENSION_;
/**
* @type {boolean}
* @private
*/
this.zoomOnClick_ = true;
if (options['zoomOnClick'] != undefined) {
this.zoomOnClick_ = options['zoomOnClick'];
}
/**
* @type {boolean}
* @private
*/
this.averageCenter_ = false;
if (options['averageCenter'] != undefined) {
this.averageCenter_ = options['averageCenter'];
}
this.setupStyles_();
this.setMap(map);
/**
* @type {number}
* @private
*/
this.prevZoom_ = this.map_.getZoom();
// Add the map event listeners
var that = this;
google.maps.event.addListener(this.map_, 'zoom_changed', function() {
var zoom = that.map_.getZoom();
if (that.prevZoom_ != zoom) {
that.prevZoom_ = zoom;
that.resetViewport();
}
});
google.maps.event.addListener(this.map_, 'idle', function() {
that.redraw();
});
// Finally, add the markers
if (opt_markers && opt_markers.length) {
this.addMarkers(opt_markers, false);
}
}
/**
* The marker cluster image path.
*
* @type {string}
* @private
*/
MarkerClusterer.prototype.MARKER_CLUSTER_IMAGE_PATH_ = '../images/m';
/**
* The marker cluster image path.
*
* @type {string}
* @private
*/
MarkerClusterer.prototype.MARKER_CLUSTER_IMAGE_EXTENSION_ = 'png';
/**
* Extends a objects prototype by anothers.
*
* @param {Object} obj1 The object to be extended.
* @param {Object} obj2 The object to extend with.
* @return {Object} The new extended object.
* @ignore
*/
MarkerClusterer.prototype.extend = function(obj1, obj2) {
return (function(object) {
for (var property in object.prototype) {
this.prototype[property] = object.prototype[property];
}
return this;
}).apply(obj1, [obj2]);
};
/**
* Implementaion of the interface method.
* @ignore
*/
MarkerClusterer.prototype.onAdd = function() {
this.setReady_(true);
};
/**
* Implementaion of the interface method.
* @ignore
*/
MarkerClusterer.prototype.draw = function() {};
/**
* Sets up the styles object.
*
* @private
*/
MarkerClusterer.prototype.setupStyles_ = function() {
if (this.styles_.length) {
return;
}
for (var i = 0, size; size = this.sizes[i]; i++) {
this.styles_.push({
url: this.imagePath_ + (i + 1) + '.' + this.imageExtension_,
height: size,
width: size
});
}
};
/**
* Fit the map to the bounds of the markers in the clusterer.
*/
MarkerClusterer.prototype.fitMapToMarkers = function() {
var markers = this.getMarkers();
var bounds = new google.maps.LatLngBounds();
for (var i = 0, marker; marker = markers[i]; i++) {
bounds.extend(marker.getPosition());
}
this.map_.fitBounds(bounds);
};
/**
* Sets the styles.
*
* @param {Object} styles The style to set.
*/
MarkerClusterer.prototype.setStyles = function(styles) {
this.styles_ = styles;
};
/**
* Gets the styles.
*
* @return {Object} The styles object.
*/
MarkerClusterer.prototype.getStyles = function() {
return this.styles_;
};
/**
* Whether zoom on click is set.
*
* @return {boolean} True if zoomOnClick_ is set.
*/
MarkerClusterer.prototype.isZoomOnClick = function() {
return this.zoomOnClick_;
};
/**
* Whether average center is set.
*
* @return {boolean} True if averageCenter_ is set.
*/
MarkerClusterer.prototype.isAverageCenter = function() {
return this.averageCenter_;
};
/**
* Returns the array of markers in the clusterer.
*
* @return {Array.<google.maps.Marker>} The markers.
*/
MarkerClusterer.prototype.getMarkers = function() {
return this.markers_;
};
/**
* Returns the number of markers in the clusterer
*
* @return {Number} The number of markers.
*/
MarkerClusterer.prototype.getTotalMarkers = function() {
return this.markers_.length;
};
/**
* Sets the max zoom for the clusterer.
*
* @param {number} maxZoom The max zoom level.
*/
MarkerClusterer.prototype.setMaxZoom = function(maxZoom) {
this.maxZoom_ = maxZoom;
};
/**
* Gets the max zoom for the clusterer.
*
* @return {number} The max zoom level.
*/
MarkerClusterer.prototype.getMaxZoom = function() {
return this.maxZoom_;
};
/**
* The function for calculating the cluster icon image.
*
* @param {Array.<google.maps.Marker>} markers The markers in the clusterer.
* @param {number} numStyles The number of styles available.
* @return {Object} A object properties: 'text' (string) and 'index' (number).
* @private
*/
MarkerClusterer.prototype.calculator_ = function(markers, numStyles) {
var index = 0;
var count = markers.length;
var dv = count;
while (dv !== 0) {
dv = parseInt(dv / 10, 10);
index++;
}
index = Math.min(index, numStyles);
return {
text: count,
index: index
};
};
/**
* Set the calculator function.
*
* @param {function(Array, number)} calculator The function to set as the
* calculator. The function should return a object properties:
* 'text' (string) and 'index' (number).
*
*/
MarkerClusterer.prototype.setCalculator = function(calculator) {
this.calculator_ = calculator;
};
/**
* Get the calculator function.
*
* @return {function(Array, number)} the calculator function.
*/
MarkerClusterer.prototype.getCalculator = function() {
return this.calculator_;
};
/**
* Add an array of markers to the clusterer.
*
* @param {Array.<google.maps.Marker>} markers The markers to add.
* @param {boolean=} opt_nodraw Whether to redraw the clusters.
*/
MarkerClusterer.prototype.addMarkers = function(markers, opt_nodraw) {
for (var i = 0, marker; marker = markers[i]; i++) {
this.pushMarkerTo_(marker);
}
if (!opt_nodraw) {
this.redraw();
}
};
/**
* Pushes a marker to the clusterer.
*
* @param {google.maps.Marker} marker The marker to add.
* @private
*/
MarkerClusterer.prototype.pushMarkerTo_ = function(marker) {
marker.isAdded = false;
if (marker['draggable']) {
// If the marker is draggable add a listener so we update the clusters on
// the drag end.
var that = this;
google.maps.event.addListener(marker, 'dragend', function() {
marker.isAdded = false;
that.repaint();
});
}
this.markers_.push(marker);
};
/**
* Adds a marker to the clusterer and redraws if needed.
*
* @param {google.maps.Marker} marker The marker to add.
* @param {boolean=} opt_nodraw Whether to redraw the clusters.
*/
MarkerClusterer.prototype.addMarker = function(marker, opt_nodraw) {
this.pushMarkerTo_(marker);
if (!opt_nodraw) {
this.redraw();
}
};
/**
* Removes a marker and returns true if removed, false if not
*
* @param {google.maps.Marker} marker The marker to remove
* @return {boolean} Whether the marker was removed or not
* @private
*/
MarkerClusterer.prototype.removeMarker_ = function(marker) {
var index = -1;
if (this.markers_.indexOf) {
index = this.markers_.indexOf(marker);
} else {
for (var i = 0, m; m = this.markers_[i]; i++) {
if (m == marker) {
index = i;
break;
}
}
}
if (index == -1) {
// Marker is not in our list of markers.
return false;
}
marker.setMap(null);
this.markers_.splice(index, 1);
return true;
};
/**
* Remove a marker from the cluster.
*
* @param {google.maps.Marker} marker The marker to remove.
* @param {boolean=} opt_nodraw Optional boolean to force no redraw.
* @return {boolean} True if the marker was removed.
*/
MarkerClusterer.prototype.removeMarker = function(marker, opt_nodraw) {
var removed = this.removeMarker_(marker);
if (!opt_nodraw && removed) {
this.resetViewport();
this.redraw();
return true;
} else {
return false;
}
};
/**
* Removes an array of markers from the cluster.
*
* @param {Array.<google.maps.Marker>} markers The markers to remove.
* @param {boolean=} opt_nodraw Optional boolean to force no redraw.
*/
MarkerClusterer.prototype.removeMarkers = function(markers, opt_nodraw) {
var removed = false;
for (var i = 0, marker; marker = markers[i]; i++) {
var r = this.removeMarker_(marker);
removed = removed || r;
}
if (!opt_nodraw && removed) {
this.resetViewport();
this.redraw();
return true;
}
};
/**
* Sets the clusterer's ready state.
*
* @param {boolean} ready The state.
* @private
*/
MarkerClusterer.prototype.setReady_ = function(ready) {
if (!this.ready_) {
this.ready_ = ready;
this.createClusters_();
}
};
/**
* Returns the number of clusters in the clusterer.
*
* @return {number} The number of clusters.
*/
MarkerClusterer.prototype.getTotalClusters = function() {
return this.clusters_.length;
};
/**
* Returns the google map that the clusterer is associated with.
*
* @return {google.maps.Map} The map.
*/
MarkerClusterer.prototype.getMap = function() {
return this.map_;
};
/**
* Sets the google map that the clusterer is associated with.
*
* @param {google.maps.Map} map The map.
*/
MarkerClusterer.prototype.setMap = function(map) {
this.map_ = map;
};
/**
* Returns the size of the grid.
*
* @return {number} The grid size.
*/
MarkerClusterer.prototype.getGridSize = function() {
return this.gridSize_;
};
/**
* Sets the size of the grid.
*
* @param {number} size The grid size.
*/
MarkerClusterer.prototype.setGridSize = function(size) {
this.gridSize_ = size;
};
/**
* Returns the min cluster size.
*
* @return {number} The grid size.
*/
MarkerClusterer.prototype.getMinClusterSize = function() {
return this.minClusterSize_;
};
/**
* Sets the min cluster size.
*
* @param {number} size The grid size.
*/
MarkerClusterer.prototype.setMinClusterSize = function(size) {
this.minClusterSize_ = size;
};
/**
* Extends a bounds object by the grid size.
*
* @param {google.maps.LatLngBounds} bounds The bounds to extend.
* @return {google.maps.LatLngBounds} The extended bounds.
*/
MarkerClusterer.prototype.getExtendedBounds = function(bounds) {
var projection = this.getProjection();
// Turn the bounds into latlng.
var tr = new google.maps.LatLng(bounds.getNorthEast().lat(),
bounds.getNorthEast().lng());
var bl = new google.maps.LatLng(bounds.getSouthWest().lat(),
bounds.getSouthWest().lng());
// Convert the points to pixels and the extend out by the grid size.
var trPix = projection.fromLatLngToDivPixel(tr);
trPix.x += this.gridSize_;
trPix.y -= this.gridSize_;
var blPix = projection.fromLatLngToDivPixel(bl);
blPix.x -= this.gridSize_;
blPix.y += this.gridSize_;
// Convert the pixel points back to LatLng
var ne = projection.fromDivPixelToLatLng(trPix);
var sw = projection.fromDivPixelToLatLng(blPix);
// Extend the bounds to contain the new bounds.
bounds.extend(ne);
bounds.extend(sw);
return bounds;
};
/**
* Determins if a marker is contained in a bounds.
*
* @param {google.maps.Marker} marker The marker to check.
* @param {google.maps.LatLngBounds} bounds The bounds to check against.
* @return {boolean} True if the marker is in the bounds.
* @private
*/
MarkerClusterer.prototype.isMarkerInBounds_ = function(marker, bounds) {
return bounds.contains(marker.getPosition());
};
/**
* Clears all clusters and markers from the clusterer.
*/
MarkerClusterer.prototype.clearMarkers = function() {
this.resetViewport(true);
// Set the markers a empty array.
this.markers_ = [];
};
/**
* Clears all existing clusters and recreates them.
* @param {boolean} opt_hide To also hide the marker.
*/
MarkerClusterer.prototype.resetViewport = function(opt_hide) {
// Remove all the clusters
for (var i = 0, cluster; cluster = this.clusters_[i]; i++) {
cluster.remove();
}
// Reset the markers to not be added and to be invisible.
for (var i = 0, marker; marker = this.markers_[i]; i++) {
marker.isAdded = false;
if (opt_hide) {
marker.setMap(null);
}
}
this.clusters_ = [];
};
/**
*
*/
MarkerClusterer.prototype.repaint = function() {
var oldClusters = this.clusters_.slice();
this.clusters_.length = 0;
this.resetViewport();
this.redraw();
// Remove the old clusters.
// Do it in a timeout so the other clusters have been drawn first.
window.setTimeout(function() {
for (var i = 0, cluster; cluster = oldClusters[i]; i++) {
cluster.remove();
}
}, 0);
};
/**
* Redraws the clusters.
*/
MarkerClusterer.prototype.redraw = function() {
this.createClusters_();
};
/**
* Calculates the distance between two latlng locations in km.
* @see http://www.movable-type.co.uk/scripts/latlong.html
*
* @param {google.maps.LatLng} p1 The first lat lng point.
* @param {google.maps.LatLng} p2 The second lat lng point.
* @return {number} The distance between the two points in km.
* @private
*/
MarkerClusterer.prototype.distanceBetweenPoints_ = function(p1, p2) {
if (!p1 || !p2) {
return 0;
}
var R = 6371; // Radius of the Earth in km
var dLat = (p2.lat() - p1.lat()) * Math.PI / 180;
var dLon = (p2.lng() - p1.lng()) * Math.PI / 180;
var a = Math.sin(dLat / 2) * Math.sin(dLat / 2) +
Math.cos(p1.lat() * Math.PI / 180) * Math.cos(p2.lat() * Math.PI / 180) *
Math.sin(dLon / 2) * Math.sin(dLon / 2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
var d = R * c;
return d;
};
/**
* Add a marker to a cluster, or creates a new cluster.
*
* @param {google.maps.Marker} marker The marker to add.
* @private
*/
MarkerClusterer.prototype.addToClosestCluster_ = function(marker) {
var distance = 40000; // Some large number
var clusterToAddTo = null;
var pos = marker.getPosition();
for (var i = 0, cluster; cluster = this.clusters_[i]; i++) {
var center = cluster.getCenter();
if (center) {
var d = this.distanceBetweenPoints_(center, marker.getPosition());
if (d < distance) {
distance = d;
clusterToAddTo = cluster;
}
}
}
if (clusterToAddTo && clusterToAddTo.isMarkerInClusterBounds(marker)) {
clusterToAddTo.addMarker(marker);
} else {
var cluster = new Cluster(this);
cluster.addMarker(marker);
this.clusters_.push(cluster);
}
};
/**
* Creates the clusters.
*
* @private
*/
MarkerClusterer.prototype.createClusters_ = function() {
if (!this.ready_) {
return;
}
// Get our current map view bounds.
// Create a new bounds object so we don't affect the map.
var mapBounds = new google.maps.LatLngBounds(this.map_.getBounds().getSouthWest(),
this.map_.getBounds().getNorthEast());
var bounds = this.getExtendedBounds(mapBounds);
for (var i = 0, marker; marker = this.markers_[i]; i++) {
if (!marker.isAdded && this.isMarkerInBounds_(marker, bounds)) {
this.addToClosestCluster_(marker);
}
}
};
/**
* A cluster that contains markers.
*
* @param {MarkerClusterer} markerClusterer The markerclusterer that this
* cluster is associated with.
* @constructor
* @ignore
*/
function Cluster(markerClusterer) {
this.markerClusterer_ = markerClusterer;
this.map_ = markerClusterer.getMap();
this.gridSize_ = markerClusterer.getGridSize();
this.minClusterSize_ = markerClusterer.getMinClusterSize();
this.averageCenter_ = markerClusterer.isAverageCenter();
this.center_ = null;
this.markers_ = [];
this.bounds_ = null;
this.clusterIcon_ = new ClusterIcon(this, markerClusterer.getStyles(),
markerClusterer.getGridSize());
}
/**
* Determins if a marker is already added to the cluster.
*
* @param {google.maps.Marker} marker The marker to check.
* @return {boolean} True if the marker is already added.
*/
Cluster.prototype.isMarkerAlreadyAdded = function(marker) {
if (this.markers_.indexOf) {
return this.markers_.indexOf(marker) != -1;
} else {
for (var i = 0, m; m = this.markers_[i]; i++) {
if (m == marker) {
return true;
}
}
}
return false;
};
/**
* Add a marker the cluster.
*
* @param {google.maps.Marker} marker The marker to add.
* @return {boolean} True if the marker was added.
*/
Cluster.prototype.addMarker = function(marker) {
if (this.isMarkerAlreadyAdded(marker)) {
return false;
}
if (!this.center_) {
this.center_ = marker.getPosition();
this.calculateBounds_();
} else {
if (this.averageCenter_) {
var l = this.markers_.length + 1;
var lat = (this.center_.lat() * (l-1) + marker.getPosition().lat()) / l;
var lng = (this.center_.lng() * (l-1) + marker.getPosition().lng()) / l;
this.center_ = new google.maps.LatLng(lat, lng);
this.calculateBounds_();
}
}
marker.isAdded = true;
this.markers_.push(marker);
var len = this.markers_.length;
if (len < this.minClusterSize_ && marker.getMap() != this.map_) {
// Min cluster size not reached so show the marker.
marker.setMap(this.map_);
}
if (len == this.minClusterSize_) {
// Hide the markers that were showing.
for (var i = 0; i < len; i++) {
this.markers_[i].setMap(null);
}
}
if (len >= this.minClusterSize_) {
marker.setMap(null);
}
this.updateIcon();
return true;
};
/**
* Returns the marker clusterer that the cluster is associated with.
*
* @return {MarkerClusterer} The associated marker clusterer.
*/
Cluster.prototype.getMarkerClusterer = function() {
return this.markerClusterer_;
};
/**
* Returns the bounds of the cluster.
*
* @return {google.maps.LatLngBounds} the cluster bounds.
*/
Cluster.prototype.getBounds = function() {
var bounds = new google.maps.LatLngBounds(this.center_, this.center_);
var markers = this.getMarkers();
for (var i = 0, marker; marker = markers[i]; i++) {
bounds.extend(marker.getPosition());
}
return bounds;
};
/**
* Removes the cluster
*/
Cluster.prototype.remove = function() {
this.clusterIcon_.remove();
this.markers_.length = 0;
delete this.markers_;
};
/**
* Returns the center of the cluster.
*
* @return {number} The cluster center.
*/
Cluster.prototype.getSize = function() {
return this.markers_.length;
};
/**
* Returns the center of the cluster.
*
* @return {Array.<google.maps.Marker>} The cluster center.
*/
Cluster.prototype.getMarkers = function() {
return this.markers_;
};
/**
* Returns the center of the cluster.
*
* @return {google.maps.LatLng} The cluster center.
*/
Cluster.prototype.getCenter = function() {
return this.center_;
};
/**
* Calculated the extended bounds of the cluster with the grid.
*
* @private
*/
Cluster.prototype.calculateBounds_ = function() {
var bounds = new google.maps.LatLngBounds(this.center_, this.center_);
this.bounds_ = this.markerClusterer_.getExtendedBounds(bounds);
};
/**
* Determines if a marker lies in the clusters bounds.
*
* @param {google.maps.Marker} marker The marker to check.
* @return {boolean} True if the marker lies in the bounds.
*/
Cluster.prototype.isMarkerInClusterBounds = function(marker) {
return this.bounds_.contains(marker.getPosition());
};
/**
* Returns the map that the cluster is associated with.
*
* @return {google.maps.Map} The map.
*/
Cluster.prototype.getMap = function() {
return this.map_;
};
/**
* Updates the cluster icon
*/
Cluster.prototype.updateIcon = function() {
var zoom = this.map_.getZoom();
var mz = this.markerClusterer_.getMaxZoom();
if (mz && zoom > mz) {
// The zoom is greater than our max zoom so show all the markers in cluster.
for (var i = 0, marker; marker = this.markers_[i]; i++) {
marker.setMap(this.map_);
}
return;
}
if (this.markers_.length < this.minClusterSize_) {
// Min cluster size not yet reached.
this.clusterIcon_.hide();
return;
}
var numStyles = this.markerClusterer_.getStyles().length;
var sums = this.markerClusterer_.getCalculator()(this.markers_, numStyles);
this.clusterIcon_.setCenter(this.center_);
this.clusterIcon_.setSums(sums);
this.clusterIcon_.show();
};
/**
* A cluster icon
*
* @param {Cluster} cluster The cluster to be associated with.
* @param {Object} styles An object that has style properties:
* 'url': (string) The image url.
* 'height': (number) The image height.
* 'width': (number) The image width.
* 'anchor': (Array) The anchor position of the label text.
* 'textColor': (string) The text color.
* 'textSize': (number) The text size.
* 'backgroundPosition: (string) The background postition x, y.
* @param {number=} opt_padding Optional padding to apply to the cluster icon.
* @constructor
* @extends google.maps.OverlayView
* @ignore
*/
function ClusterIcon(cluster, styles, opt_padding) {
cluster.getMarkerClusterer().extend(ClusterIcon, google.maps.OverlayView);
this.styles_ = styles;
this.padding_ = opt_padding || 0;
this.cluster_ = cluster;
this.center_ = null;
this.map_ = cluster.getMap();
this.div_ = null;
this.sums_ = null;
this.visible_ = false;
this.setMap(this.map_);
}
/**
* Triggers the clusterclick event and zoom's if the option is set.
*
* @param {google.maps.MouseEvent} event The event to propagate
*/
ClusterIcon.prototype.triggerClusterClick = function(event) {
var markerClusterer = this.cluster_.getMarkerClusterer();
// Trigger the clusterclick event.
google.maps.event.trigger(markerClusterer, 'clusterclick', this.cluster_, event);
if (markerClusterer.isZoomOnClick()) {
// Zoom into the cluster.
this.map_.fitBounds(this.cluster_.getBounds());
}
};
/**
* Adding the cluster icon to the dom.
* @ignore
*/
ClusterIcon.prototype.onAdd = function() {
this.div_ = document.createElement('DIV');
this.div_.className='cluster';
if (this.visible_) {
var pos = this.getPosFromLatLng_(this.center_);
this.div_.style.cssText = this.createCss(pos);
this.div_.innerHTML = this.sums_.text;
this.div_.className='cluster-visible';
}
var panes = this.getPanes();
panes.overlayMouseTarget.appendChild(this.div_);
var that = this;
var isDragging = false;
google.maps.event.addDomListener(this.div_, 'click', function(event) {
// Only perform click when not preceded by a drag
if (!isDragging) {
that.triggerClusterClick(event);
}
});
google.maps.event.addDomListener(this.div_, 'mousedown', function() {
isDragging = false;
});
google.maps.event.addDomListener(this.div_, 'mousemove', function() {
isDragging = true;
});
};
/**
* Returns the position to place the div dending on the latlng.
*
* @param {google.maps.LatLng} latlng The position in latlng.
* @return {google.maps.Point} The position in pixels.
* @private
*/
ClusterIcon.prototype.getPosFromLatLng_ = function(latlng) {
var pos = this.getProjection().fromLatLngToDivPixel(latlng);
if (typeof this.iconAnchor_ === 'object' && this.iconAnchor_.length === 2) {
pos.x -= this.iconAnchor_[0];
pos.y -= this.iconAnchor_[1];
} else {
pos.x -= parseInt(this.width_ / 2, 10);
pos.y -= parseInt(this.height_ / 2, 10);
}
return pos;
};
/**
* Draw the icon.
* @ignore
*/
ClusterIcon.prototype.draw = function() {
if (this.visible_) {
var pos = this.getPosFromLatLng_(this.center_);
this.div_.style.top = pos.y + 'px';
this.div_.style.left = pos.x + 'px';
}
};
/**
* Hide the icon.
*/
ClusterIcon.prototype.hide = function() {
if (this.div_) {
this.div_.style.display = 'none';
}
this.visible_ = false;
};
/**
* Position and show the icon.
*/
ClusterIcon.prototype.show = function() {
if (this.div_) {
var pos = this.getPosFromLatLng_(this.center_);
this.div_.style.cssText = this.createCss(pos);
this.div_.style.display = '';
}
this.visible_ = true;
};
/**
* Remove the icon from the map
*/
ClusterIcon.prototype.remove = function() {
this.setMap(null);
};
/**
* Implementation of the onRemove interface.
* @ignore
*/
ClusterIcon.prototype.onRemove = function() {
if (this.div_ && this.div_.parentNode) {
this.hide();
this.div_.parentNode.removeChild(this.div_);
this.div_ = null;
}
};
/**
* Set the sums of the icon.
*
* @param {Object} sums The sums containing:
* 'text': (string) The text to display in the icon.
* 'index': (number) The style index of the icon.
*/
ClusterIcon.prototype.setSums = function(sums) {
this.sums_ = sums;
this.text_ = sums.text;
this.index_ = sums.index;
if (this.div_) {
this.div_.innerHTML = sums.text;
}
this.useStyle();
};
/**
* Sets the icon to the the styles.
*/
ClusterIcon.prototype.useStyle = function() {
var index = Math.max(0, this.sums_.index - 1);
index = Math.min(this.styles_.length - 1, index);
var style = this.styles_[index];
this.url_ = style['url'];
this.height_ = style['height'];
this.width_ = style['width'];
this.textColor_ = style['textColor'];
this.anchor_ = style['anchor'];
this.textSize_ = style['textSize'];
this.backgroundPosition_ = style['backgroundPosition'];
this.iconAnchor_ = style['iconAnchor'];
};
/**
* Sets the center of the icon.
*
* @param {google.maps.LatLng} center The latlng to set as the center.
*/
ClusterIcon.prototype.setCenter = function(center) {
this.center_ = center;
};
/**
* Create the css text based on the position of the icon.
*
* @param {google.maps.Point} pos The position.
* @return {string} The css style text.
*/
ClusterIcon.prototype.createCss = function(pos) {
var style = [];
style.push('background-image:url(' + this.url_ + ');');
var backgroundPosition = this.backgroundPosition_ ? this.backgroundPosition_ : '0 0';
style.push('background-position:' + backgroundPosition + ';');
if (typeof this.anchor_ === 'object') {
if (typeof this.anchor_[0] === 'number' && this.anchor_[0] > 0 &&
this.anchor_[0] < this.height_) {
style.push('height:' + (this.height_ - this.anchor_[0]) +
'px; padding-top:' + this.anchor_[0] + 'px;');
} else if (typeof this.anchor_[0] === 'number' && this.anchor_[0] < 0 &&
-this.anchor_[0] < this.height_) {
style.push('height:' + this.height_ + 'px; line-height:' + (this.height_ + this.anchor_[0]) +
'px;');
} else {
style.push('height:' + this.height_ + 'px; line-height:' + this.height_ +
'px;');
}
if (typeof this.anchor_[1] === 'number' && this.anchor_[1] > 0 &&
this.anchor_[1] < this.width_) {
style.push('width:' + (this.width_ - this.anchor_[1]) +
'px; padding-left:' + this.anchor_[1] + 'px;');
} else {
style.push('width:' + this.width_ + 'px; text-align:center;');
}
} else {
style.push('height:' + this.height_ + 'px; line-height:' +
this.height_ + 'px; width:' + this.width_ + 'px; text-align:center;');
}
var txtColor = this.textColor_ ? this.textColor_ : 'black';
var txtSize = this.textSize_ ? this.textSize_ : 11;
style.push('cursor:pointer; top:' + pos.y + 'px; left:' +
pos.x + 'px; color:' + txtColor + '; position:absolute; font-size:' +
txtSize + 'px; font-family:Arial,sans-serif; font-weight:bold');
return style.join('');
};
// Export Symbols for Closure
// If you are not going to compile with closure then you can remove the
// code below.
window['MarkerClusterer'] = MarkerClusterer;
MarkerClusterer.prototype['addMarker'] = MarkerClusterer.prototype.addMarker;
MarkerClusterer.prototype['addMarkers'] = MarkerClusterer.prototype.addMarkers;
MarkerClusterer.prototype['clearMarkers'] =
MarkerClusterer.prototype.clearMarkers;
MarkerClusterer.prototype['fitMapToMarkers'] =
MarkerClusterer.prototype.fitMapToMarkers;
MarkerClusterer.prototype['getCalculator'] =
MarkerClusterer.prototype.getCalculator;
MarkerClusterer.prototype['getGridSize'] =
MarkerClusterer.prototype.getGridSize;
MarkerClusterer.prototype['getExtendedBounds'] =
MarkerClusterer.prototype.getExtendedBounds;
MarkerClusterer.prototype['getMap'] = MarkerClusterer.prototype.getMap;
MarkerClusterer.prototype['getMarkers'] = MarkerClusterer.prototype.getMarkers;
MarkerClusterer.prototype['getMaxZoom'] = MarkerClusterer.prototype.getMaxZoom;
MarkerClusterer.prototype['getStyles'] = MarkerClusterer.prototype.getStyles;
MarkerClusterer.prototype['getTotalClusters'] =
MarkerClusterer.prototype.getTotalClusters;
MarkerClusterer.prototype['getTotalMarkers'] =
MarkerClusterer.prototype.getTotalMarkers;
MarkerClusterer.prototype['redraw'] = MarkerClusterer.prototype.redraw;
MarkerClusterer.prototype['removeMarker'] =
MarkerClusterer.prototype.removeMarker;
MarkerClusterer.prototype['removeMarkers'] =
MarkerClusterer.prototype.removeMarkers;
MarkerClusterer.prototype['resetViewport'] =
MarkerClusterer.prototype.resetViewport;
MarkerClusterer.prototype['repaint'] =
MarkerClusterer.prototype.repaint;
MarkerClusterer.prototype['setCalculator'] =
MarkerClusterer.prototype.setCalculator;
MarkerClusterer.prototype['setGridSize'] =
MarkerClusterer.prototype.setGridSize;
MarkerClusterer.prototype['setMaxZoom'] =
MarkerClusterer.prototype.setMaxZoom;
MarkerClusterer.prototype['onAdd'] = MarkerClusterer.prototype.onAdd;
MarkerClusterer.prototype['draw'] = MarkerClusterer.prototype.draw;
Cluster.prototype['getCenter'] = Cluster.prototype.getCenter;
Cluster.prototype['getSize'] = Cluster.prototype.getSize;
Cluster.prototype['getMarkers'] = Cluster.prototype.getMarkers;
ClusterIcon.prototype['onAdd'] = ClusterIcon.prototype.onAdd;
ClusterIcon.prototype['draw'] = ClusterIcon.prototype.draw;
ClusterIcon.prototype['onRemove'] = ClusterIcon.prototype.onRemove;
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