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View Full Version : Javascript shows only last markers



F__i__L
11-29-2012, 07:45 PM
The following code grabs some JSON data from /home.json URL which contain 5 microposts by 6 users. However, only the last 4 markers are shown (not even the 5th !!). I have spend 2 days to find the bug but unfortunately I can't really get why this dosen't work. If anyone could help me I would really appreciate it!


var GMAPS = window.GMAPS || {};
GMAPS.mainMap = function() {
var map;
var infowindow = new google.maps.InfoWindow();
var jsonObject = {};

function addMarkers() {
var xhr = new XMLHttpRequest();
xhr.open( "GET", "/home.json", true );
xhr.onreadystatechange = function () {
if ( xhr.readyState == 4 && xhr.status == 200 ) {
jsonObject = JSON.parse( xhr.responseText );
for (var i=0; i<jsonObject.length; i++) {
for (var j=0; j<jsonObject[i].microposts.length; j++) {
(function(Name, Title, Content, Latitude, Longitude) {
return function() {
//alert(Name + "\n" + Title + "\n" + Content + "\n" + Latitude + "\n" + Longitude + "\n"); //<-- this works!
var position = new google.maps.LatLng(Latitude, Longitude);
var contentString = "<h4>" + Name.bold() + "</h4>" + "<br />" + Title.bold()
+ "<br />" + Content;

var marker = new google.maps.Marker({
position: position,
title: Title,
map: map
});
google.maps.event.addListener(marker, 'click', (function(marker, contentString) {
return function() {
infowindow.setContent(contentString);
infowindow.open(map, marker);
}
})(marker, contentString));
};
})(jsonObject[i].name, jsonObject[i].microposts[j].title,
jsonObject[i].microposts[j].content,
jsonObject[i].microposts[j].lat,
jsonObject[i].microposts[j].lon)();
}
}
}
};
xhr.send(null);
}

function createMap() {
map = new google.maps.Map(document.getElementById('main_map'), {
zoom: 10,
panControl: true,
zoomControl: true,
zoomControlOptions: {
style: google.maps.ZoomControlStyle.SMALL
},
mapTypeControl: true,
scaleControl: true,
streetViewControl: true,
overviewMapControl: true,
scrollwheel: false,
center: new google.maps.LatLng(37.975327,23.728701),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
}


function initAddress() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(showPosition);
}
else {
var position = new google.maps.LatLng(0, 0);
map.setCenter(position);
}
}

function showPosition(position) {
var position = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
map.setCenter(position);
}

return {

initMap : function() {
createMap();
initAddress();
addMarkers();
}
};
}();

document.addEventListener("DOMContentLoaded", GMAPS.mainMap.initMap, false);



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