Add markercluster Google Maps V3

Question

Ich benutze Code wie auf dieser Seite. Wie kann ich einen Marker-Cluster hinzufügen?

Danke.

[Google Map v3 auto refresh Markers only

Answer 1

Beispielskript ...

$(function() { 
    var locations = {};//A repository for markers (and the data from which they were constructed). 

    //initial dataset for markers 
    var locs = { 
     1: { info:'11111. Some random info here', lat:-37.8139, lng:144.9634 }, 
     2: { info:'22222. Some random info here', lat:46.0553, lng:14.5144 }, 
     3: { info:'33333. Some random info here', lat:-33.7333, lng:151.0833 }, 
     4: { info:'44444. Some random info here', lat:27.9798, lng:-81.731 } 
    }; 
    var map = new google.maps.Map(document.getElementById('map_2385853'), { 
     zoom: 1, 
     maxZoom: 8, 
     minZoom: 1, 
     streetViewControl: false, 
     center: new google.maps.LatLng(40, 0), 
     mapTypeId: google.maps.MapTypeId.ROADMAP 
    }); 
    var infowindow = new google.maps.InfoWindow(); 

var auto_remove = true;//When true, markers for all unreported locs will be removed. 

function setMarkers(locObj) { 
    if(auto_remove) { 
     //Remove markers for all unreported locs, and the corrsponding locations entry. 
     $.each(locations, function(key) { 
      if(!locObj[key]) { 
       if(locations[key].marker) { 
        locations[key].marker.setMap(null); 
       } 
       delete locations[key]; 
      } 
     }); 
    } 

     $.each(locObj, function(key, loc) { 
      if(!locations[key] && loc.lat!==undefined && loc.lng!==undefined) { 
       //Marker has not yet been made (and there's enough data to create one). 

       //Create marker 
       loc.marker = new google.maps.Marker({ 
        position: new google.maps.LatLng(loc.lat, loc.lng), 
        map: map 
       }); 

       //Attach click listener to marker 
       google.maps.event.addListener(loc.marker, 'click', (function(key) { 
        return function() { 
         infowindow.setContent(locations[key].info); 
         infowindow.open(map, locations[key].marker); 
        } 
       })(key)); 

       //Remember loc in the `locations` so its info can be displayed and so its marker can be deleted. 
       locations[key] = loc; 
      } 
      else if(locations[key] && loc.remove) { 
       //Remove marker from map 
       if(locations[key].marker) { 
        locations[key].marker.setMap(null); 
       } 
       //Remove element from `locations` 
       delete locations[key]; 
      } 
      else if(locations[key]) { 
       //Update the previous data object with the latest data. 
       $.extend(locations[key], loc); 
       if(loc.lat!==undefined && loc.lng!==undefined) { 
        //Update marker position (maybe not necessary but doesn't hurt). 
        locations[key].marker.setPosition(
         new google.maps.LatLng(loc.lat, loc.lng) 
        ); 
       } 
       //locations[key].info looks after itself. 
      } 
     }); 
    } 

    var ajaxObj = {//Object to save cluttering the namespace. 
     options: { 
      url: "........",//The resource that delivers loc data. 
      dataType: "json"//The type of data tp be returned by the server. 
     }, 
     delay: 10000,//(milliseconds) the interval between successive gets. 
     errorCount: 0,//running total of ajax errors. 
     errorThreshold: 5,//the number of ajax errors beyond which the get cycle should cease. 
     ticker: null,//setTimeout reference - allows the get cycle to be cancelled with clearTimeout(ajaxObj.ticker); 
     get: function() { //a function which initiates 
      if(ajaxObj.errorCount < ajaxObj.errorThreshold) { 
       ajaxObj.ticker = setTimeout(getMarkerData, ajaxObj.delay); 
      } 
     }, 
     fail: function(jqXHR, textStatus, errorThrown) { 
      console.log(errorThrown); 
      ajaxObj.errorCount++; 
     } 
    }; 

    //Ajax master routine 
    function getMarkerData() { 
     $.ajax(ajaxObj.options) 
      .done(setMarkers) //fires when ajax returns successfully 
      .fail(ajaxObj.fail) //fires when an ajax error occurs 
      .always(ajaxObj.get); //fires after ajax success or ajax error 
    } 

    setMarkers(locs);//Create markers from the initial dataset served with the document. 
    //ajaxObj.get();//Start the get cycle. 

    // ******************* 
    //test: simulated ajax 
    /* 
    var testLocs = { 
     1: { info:'1. New Random info and new position', lat:-37, lng:124.9634 },//update info and position and 
     2: { lat:70, lng:14.5144 },//update position 
     3: { info:'3. New Random info' },//update info 
     4: { remove: true },//remove marker 
     5: { info:'55555. Added', lat:-37, lng:0 }//add new marker 
    }; 
    setTimeout(function() { 
     setMarkers(testLocs); 
    }, ajaxObj.delay); 
    */ 
    // ******************* 
});