I am using the PHP and AJAX coding below to populate a map showing various markers for a given location stored in a mySQL database.
The markers are correctly shown but what I would like to be able to do is to populate the fields on my form with the associated data from the database, so that as each marker is clicked the fields will show the data pertient to that marker.
PHP Code
<
?php
require("phpfile.php");
// Start XML file, create parent node
$dom = new DOMDocument("1.0");
$node = $dom->createElement("markers");
$parnode = $dom->appendChild($node);
// Opens a connection to a MySQL server
$connection=mysql_connect ("hostname", $username, $password);
if (!$connection) { die('Not connected : ' . mysql_error());}
// Set the active MySQL database
$db_selected = mysql_select_db($database, $connection);
if (!$db_selected) {
die ('Can\'t use db : ' . mysql_error());
}
// Select all the rows in the markers table
$query = "SELECT findid, locationid, findosgb36lat, findosgb36lon, dateoftrip, findcategory, findname, finddescription, pasref, findimage, additionalcomments FROM finds WHERE `locationid` = '2'";
$result = mysql_query($query);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
header("Content-type: text/xml");
// Iterate through the rows, adding XML nodes for each
while ($row = @mysql_fetch_assoc($result)){
// ADD TO XML DOCUMENT NODE
$node = $dom->createElement("marker");
$newnode = $parnode->appendChild($node);
$newnode->setAttribute("findid",$row['findid']);
$newnode->setAttribute("locationid",$row['locationid']);
$newnode->setAttribute("findosgb36lat",$row['findosgb36lat']);
$newnode->setAttribute("findosgb36lon",$row['findosgb36lon']);
$newnode->setAttribute("dateoftrip",$row['dateoftrip']);
$newnode->setAttribute("findcategory",$row['findcategory']);
$newnode->setAttribute("findname",$row['findname']);
$newnode->setAttribute("finddescription",$row['finddescription']);
$newnode->setAttribute("pasref",$row['pasref']);
$newnode->setAttribute("findimage",$row['findimage']);
$newnode->setAttribute("additionalcomments",$row['additionalcomments']);
}
echo $dom->saveXML();
?>
HTML Code
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Finds Per Location</title>
<link rel="stylesheet" href="css/findsperlocationstyle.css" type="text/css" media="all" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false&language=en"></script>
<script type="text/javascript">
var customIcons = {
Artefact: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
Coin: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_green.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
Jewellery: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_yellow.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
}
};
// Creating a LatLngBounds object
var bounds = new google.maps.LatLngBounds();
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(54.312195845815246,-4.45948481875007),
zoom:14,
mapTypeId: 'satellite'
});
// Change this depending on the name of your PHP file
downloadUrl("phpfile.php", function(data) {
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("marker");
var bounds = new google.maps.LatLngBounds();
for (var i = 0; i < markers.length; i++) {
var findid = markers[i].getAttribute("findid");
var locationid = markers[i].getAttribute("locationid");
var dateoftrip = markers[i].getAttribute("dateoftrip");
var findcategory = markers[i].getAttribute("findcategory");
var findname = markers[i].getAttribute("findname");
var finddescription = markers[i].getAttribute("finddescription");
var pasref = markers[i].getAttribute("pasref");
var findimage= markers[i].getAttribute("findimage");
var additionalcomments= markers[i].getAttribute("additionalcomments");
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("findosgb36lat")),
parseFloat(markers[i].getAttribute("findosgb36lon")));
var icon = customIcons[findcategory] || {};
var marker = new google.maps.Marker({
map: map,
position: point,
title: 'Click to view details',
icon: icon.icon,
shadow: icon.shadow
});
bounds.extend(point);
map.fitBounds(bounds);
}
});
}
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, request.status);
}
};
request.open('GET', url, true);
request.send(null);
}
function doNothing() {}
</script>
</head>
<body onLoad="load()">
<form name="findsperlocation" id="findsperlocation">
<p align="left"><label>Location id<br />
</label>
</p>
<div>
<div align="left">
<input name="locationid" type="text" id="locationid" value="2" readonly="readonly"/>
</div>
</div>
<p align="left"><label>Date of Trip<br />
</label>
</p>
<div>
<div align="left">
<input name="dateoftrip" type="text" id="dateoftrip" readonly="readonly"/>
</div>
</div>
<p align="left">
<label></label>
<label>Find Category</label>
</p>
<div>
<div align="left">
<input name="findcategory" type="text" id="findcategory" size="10"readonly="readonly"/>
</div>
</div>
<p align="left">
<label>Find Name</label>
</p>
<div>
<div align="left">
<input name="findname" type="text" id="findname" size="35" readonly="readonly"/>
</div>
</div>
<p align="left"><label>Find Description</label> </p>
<div>
<div align="left">
<input name="finddescription" type="text" id="finddescription" size="100"readonly="readonly"/>
</div>
</div>
<p align="left">
<label>
<label>PAS Ref. </label>
</p>
<div>
<div align="left">
<input name="pasref" type="text" id="pasref" readonly="readonly"/>
</div>
</div>
<p align="left"><label>Additional Comments</label>
</p>
<div>
<div align="left">
<textarea name="additionalcomments" cols="50" rows="12" id="additionalcomments" readonly="readonly"></textarea>
</div>
</div>
<p align="left"><br />
</label>
</p>
<div>
<div align="left"></div>
</div>
</form>
<div id="map"></div>
</body>
</html>
I think I’m half way there because I’m mangaing to pull all of the information from the database. I can see this when I run the php script in my web browser, but I’m just not sure what to do for the next step.
What do I need to do next?
UPDATED CODE
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Finds Per Location</title>
<link rel="stylesheet" href="css/findsperlocationstyle.css" type="text/css" media="all" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false&language=en"></script>
<script type="text/javascript">
var customIcons = {
Artefact: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
Coin: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_green.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
Jewellery: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_yellow.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
}
};
// Creating a LatLngBounds object
var bounds = new google.maps.LatLngBounds();
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(54.312195845815246,-4.45948481875007),
zoom:14,
mapTypeId: 'satellite'
});
// Change this depending on the name of your PHP file
downloadUrl("phpfile.php", function(data) {
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("marker");
var bounds = new google.maps.LatLngBounds();
for (var i = 0; i < markers.length; i++) {
var findid = markers[i].getAttribute("findid");
var locationid = markers[i].getAttribute("locationid");
var dateoftrip = markers[i].getAttribute("dateoftrip");
var findcategory = markers[i].getAttribute("findcategory");
var findname = markers[i].getAttribute("findname");
var finddescription = markers[i].getAttribute("finddescription");
var detectorname = markers[i].getAttribute("detectorname");
var searchheadname = markers[i].getAttribute("searchheadname");
var detectorsettings = markers[i].getAttribute("detectorsettings");
var pasref = markers[i].getAttribute("pasref");
var findimage= markers[i].getAttribute("findimage");
var additionalcomments= markers[i].getAttribute("additionalcomments");
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("findosgb36lat")),
parseFloat(markers[i].getAttribute("findosgb36lon")));
var icon = customIcons[findcategory] || {};
var marker = new google.maps.Marker({
map: map,
position: point,
title: 'Click to view details',
icon: icon.icon,
shadow: icon.shadow,
formdateoftrip: "dateoftrip",
formfindcategory: "findcategory"
});
bounds.extend(point);
map.fitBounds(bounds);
}
google.maps.event.addListener(marker, "click", function() { alert("Associated data: " + this.formdateoftrip + ", " + this.findcategory); });
});
}
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, request.status);
}
};
request.open('GET', url, true);
request.send(null);
}
function doNothing() {}
</script>
</head>
<body onLoad="load()">
<form name="findsperlocation" id="findsperlocation">
<p align="left"><label>Location id<br />
</label>
</p>
<div>
<div align="left">
<input name="locationid" type="text" id="locationid" value="2" readonly="readonly"/>
</div>
</div>
<p align="left"><label>Date of Trip<br />
</label>
</p>
<div>
<div align="left">
<input name="dateoftrip" type="text" id="dateoftrip" readonly="readonly"/>
</div>
</div>
<p align="left">
<label></label>
<label>Find Category</label>
</p>
<div>
<div align="left">
<input name="findcategory" type="text" id="findcategory" size="10"readonly="readonly"/>
</div>
</div>
</form>
<div id="map"></div>
</script>
</body>
</html>
CODE SNIPPET
var marker = new google.maps.Marker({
map: map,
position: point,
title: 'Click to view details',
icon: icon.icon,
shadow: icon.shadow,
formdateoftrip: "dateoftrip",
formfindcategory: "findcategory",
formfindname: "findname",
formfinddescription: "finddescription",
formpasref: "pasref",
formfindimage: "findimage",
formadditionalcomments: "additionalcomments"
});
bounds.extend(point);
map.fitBounds(bounds);
}
google.maps.event.addListener(marker, "click", function() {
document.getElementById('dateoftrip').value = this.formdateoftrip;
document.getElementById('findcategory').value = this.formfindcategory;
document.getElementById('findname').value = this.formfindname
});
You can store additional data in your marker just by adding new fields like this:
Then all you have to do is register onClick event for the marker and put it’s data into the form.
// Edit:
Obviously the code above only shows how to retrieve data from the marker – it was just an example. Putting your data from JavaScript into the form is a 2 step process. The first thing you have to do is to give every field you want to fill an unique id via “id” attribute. You’ve already done it. Then all you have to do is put following code in the onClick event (instead of alert() in the sample above):
Good luck 😉
// Another edit:
I didn’t notice you’ve put google.maps.event.addListener in wrong place. The reason it works for only one marker is you’ve put it outside your “for” loop which creates the markers. It has to be inside, right after the “map.fitBounds(bounds);” but before “}”, so move it one line up.
The second problem lies in passing the data in the marker. If you want to reference variables, you can’t put them in quotes. You use quotes to write strings.
Replace:
Into: