私はまだグーグルマップとジャバスクリプトにかなり慣れていないと言わせてください。私はグーグルストアロケーターチュートリアルを他のものと混ぜ合わせてきました。これまでのところ、私はマーカークラスタープラス（リンク）を使用しています。これは基本的にグーグルマップAPI v3のマーカークラスターと同じですが、マウスオーバーなどの機能がいくつか追加されています。クラスターの上にマウスを置くと、情報ウィンドウが表示されるようにしようとしています。
ここで動作するデモ。これが私の完全なインデックスコードです：
<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("—Center of cluster: " + c.getCenter());
//log("—Number of managed markers in cluster: " + c.getSize());
});
// google.maps.event.addListener(markerCluster, "mouseout", function (c) {
//log("mouseout: ");
// log("—Center of cluster: " + c.getCenter());
// log("—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>
基本的にそれはこの部分に帰着します、それは私が間違った場所に置いているかもしれません：
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);
情報ウィンドウを正しく実行していると思いましたが、表示されません。コメントアウトされたアラートはテスト時に機能するため、マウスオーバーが機能することはわかっています。私が間違っていることについて何か考えはありますか？