[英]markerclusterer info windows
讓我說我仍然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與其他一些東西。 到目前為止,我使用的是標記clusterer plus( 鏈接 ),與google maps api v3的標記clusterer基本相同,但有一些附加功能,如鼠標懸停和類似的東西。 當你將鼠標懸停在一個集群上時,我正試圖讓一個信息窗口出現。
在這里工作演示。 這是我的完整索引代碼:
<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>
基本上它歸結為這部分,我可能只是把它放在錯誤的地方:
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);
我以為我正在正確地進行信息窗口,但它沒有出現。 我知道mouseover可以工作,因為當我測試時,注釋掉的警報會起作用。 我的錯誤是什么?
infoWindow.Open有兩個重載
infoWindow.Open(map, marker)
infoWindow.Open(map)
由於您希望將其添加到群集(而不是標記),因此應使用第二個
您必須設置獲得群集中心的位置
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,因為我剛剛做到了
Raphael Isidro的解決方案對我不起作用。 奇怪的是,標記文本是空的,它被定位在我的屏幕的網格(0,0)。
這對我很有用:
var markerCluster = new MarkerClusterer(map, my_markers ,{zoomOnClick: false});
google.maps.event.addListener(markerCluster, 'clusterclick', function(cluster) {
var content = '';
// Convert lat/long from cluster object to a usable MVCObject
var info = new google.maps.MVCObject;
info.set('position', cluster.center_);
iw.close();
iw.setContent('<h1>Hi this is my Info Window</h1>');
iw.open(map, info);
});
這里的工作示例:請參閱http://krisarnold.com/2010/10/15/adding-info-windows-to-map-clusters-with-google-maps-api-v3/
以下是我使用Google Maps API v3和Marker Clusterer解決這個問題的方法。 我還為infoWindow添加了一些偏移量,這樣它就不會在集群的中心打開,而是在它上面稍微打開一些。
// Define map variables
var map = new google.maps.Map(document.getElementById('mymap', {
zoom: 9,
center: {lat: 50, lng: 10}
});
var infoWindow = new google.maps.InfoWindow();
var markerCluster = new MarkerClusterer(map, markers, {zoomOnClick: false});
// Add listener for clusterclick event
markerCluster.addListener('clusterclick', function(cluster) {
// Optional: Set some offset for latitude,
// so that the InfoWindow opens a bit above the cluster
var offset = 0.1 / Math.pow(2, map.getZoom());
infoWindow.setContent('<div>Some content</div>');
infoWindow.setPosition({
lat: cluster.center_.lat() * (1 + offset),
lng: cluster.center_.lng()
});
infoWindow.open(map);
});
你有infowindow.open(map,marker);
但是我沒有看到你在哪里創建標記 (除了你的createMarkers函數中的局部變量,此時你無法真正訪問它)。 不應該是infowindow.open(map,markerCluster);
另一個建議。 第二個參數是infowindow錨定的位置。 但是,你不需要它。 創建infowindow時,可以設置位置屬性(即使用與標記相同的lat / lng)。 然后你可以調用infowindow.open(map);
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