重新計算markercluster並downloadUrl

Question

我想解決成功的問題。

正如你可以看到當你取消選中VDSL或ADSL選項時，markercluster仍然具有相同的值。

downloadUrl("php_to_xml.php", function(data) { 
     var xml = data.responseXML; 
     var markers = xml.documentElement.getElementsByTagName("marker"); 
     for (var i = 0; i < markers.length; i++) { 
      var ThisMarkers = markers[i]; 
      var lat = markers[i].getAttribute("lat"); 
      var lng = markers[i].getAttribute("lng"); 
      var typeofkafao = markers[i].getAttribute("typeofkafao"); 
      var type = markers[i].getAttribute("type"); 
      var point = new google.maps.LatLng(
       parseFloat(markers[i].getAttribute("lat")), 
       parseFloat(markers[i].getAttribute("lng"))); 
      var icon = coloredRideshareIcon(typeofkafao);  
      //below is the balloon of the marker. 
      var marker = new google.maps.Marker({ 
       map: map, 
       position: point, 
       icon: icon 
      }); 
      addMarker(typeofkafao, marker, map, infoWindow, ThisMarkers); 
     } 
     var mcOptions = {gridSize: 40, maxZoom: 15}; 
     var markerCluster = new MarkerClusterer(map,gmarkers,mcOptions); // edo trexi 
    }); 

function downloadUrl(url, callback) { 
    var request = window.ActiveXObject ? 
     new ActiveXObject('Microsoft.XMLHTTP') : 
     new XMLHttpRequest; 

     request.onreadystatechange = function() { 
      if (request.readyState == 4) { 
       request.onreadystatechange = doNothing; 
       callback(request, request.status); 
      } 
     }; 

    request.open('GET', url, true); 
    request.send(null); 
} 

我知道，問題是將downloadURL功能，因爲它的異步。 我不得不在downloadUrl之外調用markerCluster，但是我不能在downloadUrl函數外發送標記變量。

我認爲問題是解決類似的問題，但不完全如此。

var markers2; 
downloadUrl("php_to_xml.php", function(data) { 
     var xml = data.responseXML; 
     var markers = xml.documentElement.getElementsByTagName("marker"); 
     markers2 = markers; 
    }); 

for (var i = 0; i < markers2.length; i++) { 
    var ThisMarkers = markers2[i]; 
    var lat = markers2[i].getAttribute("lat"); 
    var lng = markers2[i].getAttribute("lng"); 
    var typeofkafao = markers2[i].getAttribute("typeofkafao"); 
    var type = markers2[i].getAttribute("type"); 
    var point = new google.maps.LatLng(
     parseFloat(markers2[i].getAttribute("lat")), 
     parseFloat(markers2[i].getAttribute("lng"))); 
    var icon = coloredRideshareIcon(typeofkafao);  
    //below is the balloon of the marker. 
    var marker = new google.maps.Marker({ 
     map: map, 
     position: point, 
     icon: icon 
    }); 
    addMarker(typeofkafao, marker, map, infoWindow, ThisMarkers); 
} 
var mcOptions = {gridSize: 40, maxZoom: 15}; 
var markerCluster = new MarkerClusterer(map,gmarkers,mcOptions); // edo trexi 

function downloadUrl(url, callback) { 
    var request = window.ActiveXObject ? 
     new ActiveXObject('Microsoft.XMLHTTP') : 
     new XMLHttpRequest; 

     request.onreadystatechange = function() { 
      if (request.readyState == 4) { 
       request.onreadystatechange = doNothing; 
       callback(request, request.status); 
      } 
     }; 

    request.open('GET', url, true); 
    request.send(null); 
} 

任何想法傢伙？

非常感謝

Answer 1

一看到控制檯將是有益的：

的ReferenceError：markerCluster沒有定義

的markerCluster -variable不Markers()

訪問

刪除var關鍵詞：

            
 
  
             var
            
  markerCluster = new MarkerClusterer(map,gmarkers,mcOptions);