i would like to hide markers in my object called lastCoordinates which isn't an array so when i click a button my markers hide and i can re-appear my markers with a different button. also in my code i have the function that when to right click a marker it gets deleted and the line snaps to the marker placed before the marker deleted this is done by using data from a separate random php file which creates random coordinates. here is my html code:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Simple markers</title>
<style>
html, body, #map-canvas {
height: 100%;
margin: 0px;
padding: 0px
}
#panel {
position: absolute;
top: 5px;
left: 50%;
margin-left: -180px;
z-index: 5;
background-color: #fff;
}
</style>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&signed_in=true"></script>
<script>
var map;
var stop = 0;
var markers = [];
window.onload=function ()
{
var myLatlng = new google.maps.LatLng(0,0);
var mapOptions = {
zoom: 2,
center: myLatlng
}
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
//google.maps.event.addDomListener(window, 'load', mapready);
getdata();
setInterval(function () {
if(stop<3000)
getdata();
stop++;
}, 2000);
}
function getdata()
{
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
//xmlhttp.open("GET","GetLocation.xml",true);
xmlhttp.open("GET","data.php",true);
xmlhttp.onreadystatechange=function () {gotdata()};
xmlhttp.send();
}
var lastCoordinates = [];
var polyline = new google.maps.Polyline({
strokeWeight: 6,
strokeColor:"#0000FF", // blue (RRGGBB, R=red, G=green, B=blue)
strokeOpacity: 1 // opacity of line
}); // create the polyline (global)
var path = []; // global variable to hold all the past locations
function gotdata(){
if (xmlhttp.readyState == 4){
var d = xmlhttp.responseXML.documentElement
//innerHTML shouldn't work for XML-Nodes
y = d.getElementsByTagName("y")[0].textContent,
x = d.getElementsByTagName("x")[0].textContent,
h = [x,y].join('_');
if(lastCoordinates[h]){
return;
}
lastCoordinates[h]= new google.maps.Marker({
position: new google.maps.LatLng(x,y),
map: map,
title: 'YAY'
});
rightclickableMarker(lastCoordinates[h],h);
path.push(lastCoordinates[h].getPosition());
drawPath();
}
}
function rightclickableMarker(marker, h) {
google.maps.event.addListener(marker, 'rightclick', function(evt) {
if(lastCoordinates[h] && lastCoordinates[h].setMap){
lastCoordinates[h].setMap(null);
delete marker;
var idx = path.indexOf(lastCoordinates[h].getPosition())
if (idx > -1) {
path.splice(idx, 1);
// removeLine();
drawPath();
}
}
});
}
function drawPath(){
polyline.setMap(map);
polyline.setPath(path);
}
function setAllMap(map) {
for (var i = 0; i < lastCoordinates.length; i++) {
lastCoordinates[i].setMap(map);
}
}
// Removes the markers from the map, but keeps them in the array.
function clearMarkers() {
setAllMap(null);
}
// Shows any markers currently in the array.
function showMarkers() {
setAllMap(map);
}
</script>
</head>
<body>
<div id= "panel">
<input onclick="clearMarkers();" type=button value="Hide Markers">
<input onclick="showMarkers();" type=button value="Show All Markers">
</div>
<div id="map-canvas">
</div>
</body>
</html>
and my random php selector:
<?php
header("Content-type: application/xml");
?>
<Location>
<x><?php echo rand(-85,85); ?></x>
<y><?php echo rand(-85,85); ?></y>
</Location>
You cannot store your markers in
lastCoordinates[h]and then expect to call them from var i=0 to i=lastCoordinates.length.....My suggestion, store all h values in another array
var h_s=[];
then do