Javascript 按类别列出的侧栏标记列表不工作
我用谷歌地图api v3制作了一张地图。我想做一个侧边栏，列出按类别划分的标记。单击侧栏中的标记列表时，地图上的标记将显示其信息，如本例所示。这里是map.htmlJavascript 按类别列出的侧栏标记列表不工作,javascript,google-maps,google-maps-api-3,Javascript,Google Maps,Google Maps Api 3,我用谷歌地图api v3制作了一张地图。我想做一个侧边栏，列出按类别划分的标记。单击侧栏中的标记列表时，地图上的标记将显示其信息，如本例所示。这里是map.html <!DOCTYPE html> <html> <head> <title></title> <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
#category_panel {
background-color : white;
padding : 5px;
font-size : 13px;
margin-top : 5px;
border : 1px solid #aaa;
}
#map {
width: 800px;
height: 400px;
padding : 0;
left : 3%;
top : 10%;
}
#side_bar {
position: absolute;
width: 300px;
height: 400px;
top: 3%;
left: 70%;
border : 1px solid #aaa;
}
</style>
<script type="text/javascript"
src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false&key=AIzaSyDKXwzDz8D96-bipZjRwkW97gcdHkOHt2M">
</script>
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>
<script src="http://google-maps-utility-library-v3.googlecode.com/svn/trunk/markerclusterer/src/markerclusterer.js"></script>
<script type="text/javascript">
var map;
function initialize() {
var mapOptions = {
center: new google.maps.LatLng(-6.9667, 110.41677),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map"),
mapOptions);
var selectDiv = $("#category_panel")[0];
map.controls[google.maps.ControlPosition.TOP_LEFT].push(selectDiv);
}
$(document).ready(function() {
$.getJSON("data.txt", function(json) {
$.each(json, function(key, data) {
var clusterer;
var infoWindow = new google.maps.InfoWindow();
// Marker Clusterer setup
var mcOptions = {
gridSize : 1,
maxZoom : 15
};
clusterer = new MarkerClusterer(map, [], mcOptions);
var markers = {};
var side_bar_html = "";
// Looping JSON data
for (var i = 0, length = json.length; i < length; i++) {
var data = json[i],
latLng = new google.maps.LatLng(data.lat, data.lng),
category = data.category;
if (category in markers == false) {
markers[category] = [];
}
var marker = new google.maps.Marker({
position : latLng,
title : data.title,
});
markers[category].push(marker);
// document.getElementById("side_bar").innerHTML = side_bar_html;
// side_bar_html += '<a href="javascript:(marker, data)(' + (markers.length-1) + ')">' + data.title + '<\/a><br><br>';
(function (marker, data) {
google.maps.event.addListener(marker, "click", function(e) {
infoWindow.setContent(data.description);
infoWindow.open(map, marker);
});
})(marker, data);
function makeSidebar() {
//var html = "";
for (var i = 0, length = json.length; i < length; i++) {
var data = json[i],
latLng = new google.maps.LatLng(data.lat, data.lng),
category = data.category;
if (category in markers == false) {
markers[category] = [];
}
{
side_bar_html += '<a href="javascript:(marker, data)(' + i + ')">' + data.title + '<\/a><br>';
}
}
document.getElementById("side_bar").innerHTML = side_bar_html;
}
}// loop ends
$("#category").change(function()
{
var selected = $(this).val();
clusterer.clearMarkers();
clusterer.addMarkers(markers[selected]);
});
$("#category").change();
makeSidebar();
});
});
});
</script>
</head>
<body onload="initialize()">
<div id="map"></div>
<div id="side_bar"></div>
<div lang="en" id="category_panel">
Category:<select id="category">
<option value="category1">category 1</option>
<option value="category2">category 2</option>
</select>
</div>
</body>
</html>
函数createMarker（latlng、name、html、category）{
var contentString=html；
var marker=new google.maps.marker({
位置：latlng，
图标：getMarkerImage（category2color（category）），//gicons[category]，
地图：地图，
标题：姓名，
zIndex:Math.round（latlng.lat（）*-100000）你不是已经问过这个问题了吗？我再也找不到那个问题了，所以也许你把它删除了。你为什么希望这个'+data.title+'
'；
在侧边栏中做些有用的事情呢？它给了我一个javascript错误：未捕获的引用错误：没有定义标记
是的。这是一个稍微不同的代码，我一直在使用它rching&尝试创建侧边栏。很抱歉，我不知道错误是什么，在单击侧边栏后，我在javascript控制台的浏览器中看不到任何错误。谢谢。您让它变得更完美了
[
{
"title": "1A",
"lat": -6.984,
"lng": 110.41,
"description": "1B",
"category": "category1"
},
{
"title": "1B",
"lat": -6.9963,
"lng": 110.398,
"description": "1B",
"category": "category1"
},
{
"title": "2A",
"lat": -6.9904,
"lng": 110.42307,
"description": "2B",
"category": "category2"
},
{
"title": "2B",
"lat": -7.003,
"lng": 110.4247,
"description": "2B",
"category": "category2"
}
]
function createMarker(latlng,name,html,category) {
var contentString = html;
var marker = new google.maps.Marker({
position: latlng,
icon: getMarkerImage(category2color(category)), // gicons[category],
map: map,
title: name,
zIndex: Math.round(latlng.lat()*-100000)<<5
});
// === Store the category and name info as a marker properties ===
marker.mycategory = category;
marker.myname = name;
gmarkers.push(marker);
google.maps.event.addListener(marker, 'click', function() {
infowindow.setContent(contentString);
infowindow.open(map,marker);
});
return marker;
}
function select(category) {
for (var i=0; i<gmarkers.length; i++) {
if (gmarkers[i].mycategory == category) {
gmarkers[i].setVisible(true);
} else {
gmarkers[i].setVisible(false);
}
}
// == close the info window, in case its open on a marker that we just hid
infowindow.close();
// == rebuild the side bar
makeSidebar();
}
function createCategoryDropdown(category) {
var select_holder = document.getElementById('select_holder');
var option = document.createElement("option");
option.setAttribute("name",category);
option.setAttribute("value",category);
option.innerHTML = category;
select_holder.appendChild(option);
}
function mycategoryclick(category,i) {
google.maps.event.trigger(markers[category][i],"click");
}
// == rebuilds the sidebar to match the markers currently displayed ==
function makeSidebar() {
var html = "";
for (category in markers) {
// html += "<b>"+category+"</b><br>";
for (var i=0; i<markers[category].length; i++) {
if (markers[category][i].getVisible()) {
html += '<a href="javascript:mycategoryclick("'+category+'",' + i + ')">' + markers[category][i].myname + '<\/a><br>';
}
}
}
document.getElementById("side_bar").innerHTML = html;
}
function initialize() {
var myOptions = {
zoom: 11,
center: new google.maps.LatLng(53.8363,-3.0377),
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map = new google.maps.Map(document.getElementById("map"), myOptions);
google.maps.event.addListener(map, 'click', function() {
infowindow.close();
});
// Read the data
$.getJSON("SO_20140622_data.txt", function(json) {
var firstcat = null;
var bounds = new google.maps.LatLngBounds();
for (var i = 0; i < json.length; i++) {
// obtain the attribues of each marker
var lat = parseFloat(json[i].lat);
var lng = parseFloat(json[i].lng);
var point = new google.maps.LatLng(lat,lng);
bounds.extend(point);
var name = json[i].title;
var category = json[i].category;
var html = "<b>"+name+"<\/b><p>"+json[i].description+"</p>category:"+category;
// create the marker
var marker = createMarker(point,name,html,category);
if (category in markers == false) {
if (firstcat == null) firstcat = category;
markers[category] = [];
}
markers[category].push(marker);
}
// == create the categories dropdowns ==
for (category in markers) {
createCategoryDropdown(category);
}
// == show the first category
select(firstcat);
// == create the initial sidebar ==
makeSidebar();
// == fit the viewport to _all_ the markers ==
map.fitBounds(bounds);
});
}