4
讓我說我還是相當新的谷歌地圖和JavaScript。我一直在混合谷歌商店定位器教程和其他一些東西。到目前爲止，我使用標記聚合器加（link），基本上與谷歌地圖api v3的標記聚合器相同，但具有一些附加功能，如鼠標懸停等。當您將鼠標懸停在羣集上時，我試圖獲得一個信息窗口。markerclusterer信息窗口
工作演示here。這裏是我完整的索引代碼：
<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>
基本上它歸結到這一部分，我可能只是在錯誤的地方來放：
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);
我以爲我是在做正確的信息窗口，但它不會出現。我知道鼠標懸停的作品，因爲當我測試它時，註釋掉的警報有效。任何想法我做錯了什麼？
感謝您的建議。我嘗試過，但仍然沒有什麼區別。 – thindery
第二個建議？ – duncan