集成MarkerClusterer和数据库驱动的Google Map V3

Question

我想集成MarkerCluster与我的数据库驱动的Google地图，并一直在努力让它工作。

第一个代码示例从已经具有多个标记经纬度的数据库中生成一个映射。

代码的第二位是Marker Cluster的简单版本。

我该如何将两者结合？两者都是为api的V3设置的。

<script type="text/javascript"> 
    //<![CDATA[ 

    var customIcons = { 
     restaurant: { 
     icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png', 
     shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png' 
     }, 
     bar: { 
     icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png', 
     shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png' 
     } 
    }; 

    function load() { 
     var map = new google.maps.Map(document.getElementById("map"), { 
     center: new google.maps.LatLng(47.6145, -122.3418), 
     zoom: 13, 
     mapTypeId: 'roadmap' 
     }); 
     var infoWindow = new google.maps.InfoWindow; 

     // Change this depending on the name of your PHP file 
     downloadUrl("<?php bloginfo('stylesheet_directory'); ?>/phpsqlajax_genxml.php ", function(data) { 
     var xml = data.responseXML; 
     var markers = xml.documentElement.getElementsByTagName("marker"); 
     for (var i = 0; i < markers.length; i++) { 
      var name = markers[i].getAttribute("name"); 
      var address = markers[i].getAttribute("address"); 
      var type = markers[i].getAttribute("type"); 
      var point = new google.maps.LatLng(
       parseFloat(markers[i].getAttribute("lat")), 
       parseFloat(markers[i].getAttribute("lng"))); 
      var html = "<b>" + name + "</b> <br/>" + address; 
      var icon = customIcons[type] || {}; 
      var marker = new google.maps.Marker({ 
      map: map, 
      position: point, 
      icon: icon.icon, 
      shadow: icon.shadow 
      }); 
      bindInfoWindow(marker, map, infoWindow, html); 
     } 
     }); 
    } 

    function bindInfoWindow(marker, map, infoWindow, html) { 
     google.maps.event.addListener(marker, 'click', function() { 
     infoWindow.setContent(html); 
     infoWindow.open(map, marker); 
     }); 
    } 

    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); 
    } 

    function doNothing() {} 

    //]]> 
    </script> 

下面的例子是标记集群：

var center = new google.maps.LatLng(37.4419, -122.1419); 
var options = { 
    'zoom': 13, 
    'center': center, 
    'mapTypeId': google.maps.MapTypeId.ROADMAP 
}; 

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

var markers = []; 
for (var i = 0; i < 100; i++) { 
    var latLng = new google.maps.LatLng(data.photos[i].latitude, 
     data.photos[i].longitude); 
    var marker = new google.maps.Marker({'position': latLng}); 
    markers.push(marker); 
} 
var markerCluster = new MarkerClusterer(map, markers); 

Answer 1

随着大量的试验和错误，并从@geocodezip一些帮助：

<script type="text/javascript"> 
    //<![CDATA[ 

    var customIcons = { 
     restaurant: { 
     icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png', 
     shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png' 
     }, 
     bar: { 
     icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png', 
     shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png' 
     } 
    }; 

    function load() { 
     var cluster = []; 
     var map = new google.maps.Map(document.getElementById("map"), { 
     center: new google.maps.LatLng(47.6145, -122.3418), 
     zoom: 13, 
     mapTypeId: 'roadmap' 
     }); 
var infowindow = new google.maps.InfoWindow(); 

     // Change this depending on the name of your PHP file 
     downloadUrl("<?php bloginfo('stylesheet_directory'); ?>/phpsqlajax_genxml.php ", function(data) { 
     var xml = data.responseXML; 
     var markers = xml.documentElement.getElementsByTagName("marker"); 
     for (var i = 0; i < markers.length; i++) { 
      var name = markers[i].getAttribute("name"); 
      var address = markers[i].getAttribute("address"); 
      var type = markers[i].getAttribute("type"); 
      var point = new google.maps.LatLng(
       parseFloat(markers[i].getAttribute("lat")), 
       parseFloat(markers[i].getAttribute("lng"))); 
      var html = "<b>" + name + "</b> <br/>" + address; 
      var icon = customIcons[type] || {}; 
      var marker = new google.maps.Marker({ 
      map: map, 
      position: point, 
      icon: icon.icon, 
      shadow: icon.shadow 
      }); 
      google.maps.event.addListener(marker, 'click', (function(marker, i) { 
         return function() { 
          infowindow.setContent("Info on member here"); 
          infowindow.open(map, marker); 
         } 
        })(marker, i)); 
      cluster.push(marker); 
     } 
     var mc = new MarkerClusterer(map,cluster); 
     }); 
    } 

    function bindInfoWindow(marker, map, infoWindow, html) { 
     google.maps.event.addListener(marker, 'click', function() { 
     infoWindow.setContent(html); 
     infoWindow.open(map, marker); 
     }); 
    } 

    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); 
    } 

    function doNothing() {} 

    //]]> 
    </script> 

Answer 2

你问“怎么我的第二个例子融入第一”？

将第一个示例移植到v3 API，this example从Mike Williams的v2教程翻译可能会有所帮助。

然后添加clustering和自定义infowindows（你在第二个例子中）。