
function MarkerClusterer(map,opt_markers,opt_options){this.extend(MarkerClusterer,google.maps.OverlayView);this.map_=map;this.markers_=[];this.clusters_=[];this.sizes=[53,56,66,78,90];this.styles_=[];this.ready_=false;var options=opt_options||{};this.gridSize_=options['gridSize']||60;this.minClusterSize_=options['minimumClusterSize']||2;this.maxZoom_=options['maxZoom']||null;this.styles_=options['styles']||[];this.imagePath_=options['imagePath']||this.MARKER_CLUSTER_IMAGE_PATH_;this.imageExtension_=options['imageExtension']||this.MARKER_CLUSTER_IMAGE_EXTENSION_;this.zoomOnClick_=true;if(options['zoomOnClick']!=undefined){this.zoomOnClick_=options['zoomOnClick'];}
this.averageCenter_=false;if(options['averageCenter']!=undefined){this.averageCenter_=options['averageCenter'];}
this.setupStyles_();this.setMap(map);this.prevZoom_=this.map_.getZoom();var that=this;google.maps.event.addListener(this.map_,'zoom_changed',function(){var zoom=that.map_.getZoom();var minZoom=that.map_.minZoom||0;var maxZoom=Math.min(that.map_.maxZoom||100,that.map_.mapTypes[that.map_.getMapTypeId()].maxZoom);zoom=Math.min(Math.max(zoom,minZoom),maxZoom);if(that.prevZoom_!=zoom){that.prevZoom_=zoom;that.resetViewport();}});google.maps.event.addListener(this.map_,'idle',function(){that.redraw();});if(opt_markers&&(opt_markers.length||Object.keys(opt_markers).length)){this.addMarkers(opt_markers,false);}}
MarkerClusterer.prototype.MARKER_CLUSTER_IMAGE_PATH_='images/m';MarkerClusterer.prototype.MARKER_CLUSTER_IMAGE_EXTENSION_='png';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]);};MarkerClusterer.prototype.onAdd=function(){this.setReady_(true);};MarkerClusterer.prototype.draw=function(){};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});}};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);};MarkerClusterer.prototype.setStyles=function(styles){this.styles_=styles;};MarkerClusterer.prototype.getStyles=function(){return this.styles_;};MarkerClusterer.prototype.isZoomOnClick=function(){return this.zoomOnClick_;};MarkerClusterer.prototype.isAverageCenter=function(){return this.averageCenter_;};MarkerClusterer.prototype.getMarkers=function(){return this.markers_;};MarkerClusterer.prototype.getTotalMarkers=function(){return this.markers_.length;};MarkerClusterer.prototype.setMaxZoom=function(maxZoom){this.maxZoom_=maxZoom;};MarkerClusterer.prototype.getMaxZoom=function(){return this.maxZoom_;};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};};MarkerClusterer.prototype.setCalculator=function(calculator){this.calculator_=calculator;};MarkerClusterer.prototype.getCalculator=function(){return this.calculator_;};MarkerClusterer.prototype.addMarkers=function(markers,opt_nodraw){if(markers.length){for(var i=0,marker;marker=markers[i];i++){this.pushMarkerTo_(marker);}}else if(Object.keys(markers).length){for(var marker in markers){this.pushMarkerTo_(markers[marker]);}}
if(!opt_nodraw){this.redraw();}};MarkerClusterer.prototype.pushMarkerTo_=function(marker){marker.isAdded=false;if(marker['draggable']){var that=this;google.maps.event.addListener(marker,'dragend',function(){marker.isAdded=false;that.repaint();});}
this.markers_.push(marker);};MarkerClusterer.prototype.addMarker=function(marker,opt_nodraw){this.pushMarkerTo_(marker);if(!opt_nodraw){this.redraw();}};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){return false;}
marker.setMap(null);this.markers_.splice(index,1);return true;};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;}};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;}};MarkerClusterer.prototype.setReady_=function(ready){if(!this.ready_){this.ready_=ready;this.createClusters_();}};MarkerClusterer.prototype.getTotalClusters=function(){return this.clusters_.length;};MarkerClusterer.prototype.getMap=function(){return this.map_;};MarkerClusterer.prototype.setMap=function(map){this.map_=map;};MarkerClusterer.prototype.getGridSize=function(){return this.gridSize_;};MarkerClusterer.prototype.setGridSize=function(size){this.gridSize_=size;};MarkerClusterer.prototype.getMinClusterSize=function(){return this.minClusterSize_;};MarkerClusterer.prototype.setMinClusterSize=function(size){this.minClusterSize_=size;};MarkerClusterer.prototype.getExtendedBounds=function(bounds){var projection=this.getProjection();var tr=new google.maps.LatLng(bounds.getNorthEast().lat(),bounds.getNorthEast().lng());var bl=new google.maps.LatLng(bounds.getSouthWest().lat(),bounds.getSouthWest().lng());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_;var ne=projection.fromDivPixelToLatLng(trPix);var sw=projection.fromDivPixelToLatLng(blPix);bounds.extend(ne);bounds.extend(sw);return bounds;};MarkerClusterer.prototype.isMarkerInBounds_=function(marker,bounds){return bounds.contains(marker.getPosition());};MarkerClusterer.prototype.clearMarkers=function(){this.resetViewport(true);this.markers_=[];};MarkerClusterer.prototype.resetViewport=function(opt_hide){for(var i=0,cluster;cluster=this.clusters_[i];i++){cluster.remove();}
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();window.setTimeout(function(){for(var i=0,cluster;cluster=oldClusters[i];i++){cluster.remove();}},0);};MarkerClusterer.prototype.redraw=function(){this.createClusters_();};MarkerClusterer.prototype.distanceBetweenPoints_=function(p1,p2){if(!p1||!p2){return 0;}
var R=6371;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;};MarkerClusterer.prototype.addToClosestCluster_=function(marker){var distance=40000;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);}};MarkerClusterer.prototype.createClusters_=function(){if(!this.ready_){return;}
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);}}};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());}
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;};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_){marker.setMap(this.map_);}
if(len==this.minClusterSize_){for(var i=0;i<len;i++){this.markers_[i].setMap(null);}}
if(len>=this.minClusterSize_){marker.setMap(null);}
this.updateIcon();return true;};Cluster.prototype.getMarkerClusterer=function(){return this.markerClusterer_;};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;};Cluster.prototype.remove=function(){this.clusterIcon_.remove();this.markers_.length=0;delete this.markers_;};Cluster.prototype.getSize=function(){return this.markers_.length;};Cluster.prototype.getMarkers=function(){return this.markers_;};Cluster.prototype.getCenter=function(){return this.center_;};Cluster.prototype.calculateBounds_=function(){var bounds=new google.maps.LatLngBounds(this.center_,this.center_);this.bounds_=this.markerClusterer_.getExtendedBounds(bounds);};Cluster.prototype.isMarkerInClusterBounds=function(marker){return this.bounds_.contains(marker.getPosition());};Cluster.prototype.getMap=function(){return this.map_;};Cluster.prototype.updateIcon=function(){var zoom=this.map_.getZoom();var mz=this.markerClusterer_.getMaxZoom();if(mz&&zoom>mz){for(var i=0,marker;marker=this.markers_[i];i++){marker.setMap(this.map_);}
return;}
if(this.markers_.length<this.minClusterSize_){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();};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_);}
ClusterIcon.prototype.triggerClusterClick=function(){var markerClusterer=this.cluster_.getMarkerClusterer();google.maps.event.trigger(markerClusterer,'clusterclick',this.cluster_);if(markerClusterer.isZoomOnClick()){this.map_.fitBounds(this.cluster_.getBounds());}};ClusterIcon.prototype.onAdd=function(){this.div_=document.createElement('DIV');if(this.visible_){var pos=this.getPosFromLatLng_(this.center_);this.div_.style.cssText=this.createCss(pos);this.div_.innerHTML=this.sums_.text;}
var panes=this.getPanes();panes.overlayMouseTarget.appendChild(this.div_);var that=this;google.maps.event.addDomListener(this.div_,'click',function(){that.triggerClusterClick();});};ClusterIcon.prototype.getPosFromLatLng_=function(latlng){var pos=this.getProjection().fromLatLngToDivPixel(latlng);pos.x-=parseInt(this.width_/2,10);pos.y-=parseInt(this.height_/2,10);return pos;};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';}};ClusterIcon.prototype.hide=function(){if(this.div_){this.div_.style.display='none';}
this.visible_=false;};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;};ClusterIcon.prototype.remove=function(){this.setMap(null);};ClusterIcon.prototype.onRemove=function(){if(this.div_&&this.div_.parentNode){this.hide();this.div_.parentNode.removeChild(this.div_);this.div_=null;}};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();};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'];};ClusterIcon.prototype.setCenter=function(center){this.center_=center;};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{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('');};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;Object.keys=Object.keys||function(o){var result=[];for(var name in o){if(o.hasOwnProperty(name))
result.push(name);}
return result;};