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javascript - markerclusterer 信息窗口

转载 作者：搜寻专家 更新时间：2023-11-01 05:02:23 24 4
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可以这么说吧，我对谷歌地图和 javascript 还是很陌生。我一直在将 google store locator 教程与其他一些东西混合在一起。到目前为止，我使用的是 marker clusterer plus ( link )，与 google maps api v3 的 marker clusterer 基本相同，但有一些附加功能，如鼠标悬停等。当您将鼠标悬停在集群上时，我试图让一个信息窗口出现。

工作演示 here .这是我的完整索引代码:

    <html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
    <title>Google Maps AJAX + mySQL/PHP Example</title>
    <script src="http://maps.google.com/maps/api/js?sensor=false"
            type="text/javascript"></script>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js" type="text/javascript"></script>
    <script src="markerclusterer.js" type="text/javascript"></script>
    <script type="text/javascript">
    //<![CDATA[
    var map;
    var markers = [];
    var infoWindow;
    var locationSelect; 
    var markerCluster = null;
    var m;
    var p = [];
    var contentString;


    function load() {
      map = new google.maps.Map(document.getElementById("map"), {
        center: new google.maps.LatLng(40, -100),
        zoom: 4,
        mapTypeId: 'roadmap',
        mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.DROPDOWN_MENU}
      });
      infoWindow = new google.maps.InfoWindow();
      locationSelect = document.getElementById("locationSelect");
      locationSelect.onchange = function() {
        var markerNum = locationSelect.options[locationSelect.selectedIndex].value;
        if (markerNum != "none"){
          google.maps.event.trigger(markers[markerNum], 'click');
        }
      };
   }

   function searchLocations() {
     var address = document.getElementById("addressInput").value;
     var geocoder = new google.maps.Geocoder();
     geocoder.geocode({address: address}, function(results, status) {
       if (status == google.maps.GeocoderStatus.OK) {
        searchLocationsNear(results[0].geometry.location);
       } else {
         alert(address + ' not found');
       }
     });
   }

   function clearLocations() {
     infoWindow.close();
     for (var i = 0; i < markers.length; i++) {
       markers[i].setMap(null);
     }
     markers.length = 0;
     locationSelect.innerHTML = "";
     var option = document.createElement("option");
     option.value = "none";
     option.innerHTML = "See all results:";
     locationSelect.appendChild(option);
   }

   function searchLocationsNear(center) {
     clearLocations(); 

     var radius = document.getElementById('radiusSelect').value;
     var searchUrl = 'genxml.php?lat=' + center.lat() + '&lng=' + center.lng() + '&radius=' + radius;
     downloadUrl(searchUrl, function(data) {
       var xml = parseXml(data);
       var markerNodes = xml.documentElement.getElementsByTagName("marker");
       var bounds = new google.maps.LatLngBounds();
       for (var i = 0; i < markerNodes.length; i++) {
         var name = markerNodes[i].getAttribute("name");
         var address = markerNodes[i].getAttribute("address");
         var distance = parseFloat(markerNodes[i].getAttribute("distance"));
         var foodID = markerNodes[i].getAttribute("foodID");
         var restaurantName = markerNodes[i].getAttribute("restaurantName");
         var latlng = new google.maps.LatLng(
              parseFloat(markerNodes[i].getAttribute("lat")),
              parseFloat(markerNodes[i].getAttribute("lng")));

         createOption(name, distance, i);
         createMarker(latlng, name, address, distance, foodID, restaurantName);
         bounds.extend(latlng);
       }
       map.fitBounds(bounds);
       locationSelect.style.visibility = "visible";
       locationSelect.onchange = function() {
         var markerNum = locationSelect.options[locationSelect.selectedIndex].value;
         google.maps.event.trigger(markers[markerNum], 'click');
       };
       var clusterOptions = { zoomOnClick: false }
        var markerCluster = new MarkerClusterer(map, markers, clusterOptions);
        var contentString = 'This is an example';
        var infowindow = new google.maps.InfoWindow({
        content: contentString
        });
        google.maps.event.addListener(markerCluster, "mouseover", function (c) {
            infowindow.open(map,marker);
            //alert(contentString);
          //log("mouseover: ");
          //log("&mdash;Center of cluster: " + c.getCenter());
          //log("&mdash;Number of managed markers in cluster: " + c.getSize());
        });
       // google.maps.event.addListener(markerCluster, "mouseout", function (c) {
          //log("mouseout: ");
         // log("&mdash;Center of cluster: " + c.getCenter());
         // log("&mdash;Number of managed markers in cluster: " + c.getSize());
       // });
      });
    }

    function createMarker(latlng, name, address, distance, foodID, restaurantName) {
      var html = "<b>" + name + "</b> <br/>" + address + "<br/>" + distance + "<br/>" + foodID + ": the food id" + "<br/>" + restaurantName;
      var marker = new google.maps.Marker({
        map: map,
        position: latlng
      });
      google.maps.event.addListener(marker, 'click', function() {
        infoWindow.setContent(html);
        infoWindow.open(map, marker);
      });
      markers.push(marker);
    }

    function createOption(name, distance, num) {
      var option = document.createElement("option");
      option.value = num;
      option.innerHTML = name + "(" + distance.toFixed(1) + ")";
      locationSelect.appendChild(option);
    }

    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.responseText, request.status);
        }
      };

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

    function parseXml(str) {
      if (window.ActiveXObject) {
        var doc = new ActiveXObject('Microsoft.XMLDOM');
        doc.loadXML(str);
        return doc;
      } else if (window.DOMParser) {
        return (new DOMParser).parseFromString(str, 'text/xml');
      }
    }

    function doNothing() {}

    //]]>

function log(h) {
       document.getElementById("log").innerHTML += h + "<br />";
     }

  </script>
  </head>

  <body style="margin:0px; padding:0px;" onLoad="load()"> 
    <div>
     <input type="text" id="addressInput" size="10"/>
    <select id="radiusSelect">
      <option value="25" selected>25mi</option>
      <option value="100">100mi</option>
      <option value="200">200mi</option>
    </select>

    <input type="button" onClick="searchLocations()" value="Search"/>
    </div>
    <div><select id="locationSelect" style="width:100%;visibility:hidden"></select></div>
    <div id="map" style="width: 100%; height: 80%"></div>
    <div id="log"></div>
  </body>
</html>

基本上归结为这部分，我可能只是放错了地方:

var contentString = 'This is an example';
    var infowindow = new google.maps.InfoWindow({
    content: contentString
    });
    google.maps.event.addListener(markerCluster, "mouseover", function (c) {
        infowindow.open(map,marker);

我以为我正确地设置了信息窗口，但它没有出现。我知道鼠标悬停有效，因为注释掉的警报在我测试时有效。知道我做错了什么吗？

最佳答案

infoWindow.Open 有两个重载

 infoWindow.Open(map, marker)
 infoWindow.Open(map)

既然你想把它添加到一个集群(而不是一个标记)，你应该使用第二个

您必须设置获取簇中心的位置

google.maps.event.addListener(markerCluster, "mouseover", function (mCluster) {    
    infowindow.content += "<div>Something<\/div>";
    infowindow.setPosition(mCluster.getCenter());
    infowindow.open(map);
});

我知道它有效，因为我刚刚做到了

google maps api v3 + infoBubble in markerClusterer

关于javascript - markerclusterer 信息窗口，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/7642728/

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