移动谷歌地图标记点时用纬度和经度更新数据库
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【中文标题】移动谷歌地图标记点时用纬度和经度更新数据库【英文标题】：Update db with latitude and longitude when google map marker point is move 【发布时间】：2013-11-10 09:31:51 【问题描述】：嗯，我有一个谷歌地图，所有经纬度都来自 db，它显示在地图上。
我可以用这张地图做什么：
1）我可以在地图上右键创建新点， 2）我可以删除现有的点。
现在你能告诉我当现有标记点移动到另一个地方时，我如何用新的纬度和经度更新数据库？
您可以在 www.creativeartbd.com/map 上查看我的实时地图
Index.php 页面代码：
<!DOCTYPE html>
<html>
<head>
<title>Google Map</title>
<script type="text/javascript" src="js/jquery-1.10.2.min.js"></script>
<script type="text/javascript" src="http://maps.googleapis.com/maps/api
/js?sensor=false"></script>
<script type="text/javascript">
$(document).ready(function()
var mapCenter = new google.maps.LatLng(23.721869, 90.390518); //Google map
Coordinates
var map;
map_initialize(); // initialize google map
//############### Google Map Initialize ##############
function map_initialize()
var googleMapOptions =
center: mapCenter, // map center
zoom: 15, //zoom level, 0 = earth view to higher value
maxZoom: 15,
minZoom: 5,
zoomControlOptions:
style: google.maps.ZoomControlStyle.SMALL //zoom control size
,
scaleControl: true, // enable scale control
mapTypeId: google.maps.MapTypeId.ROADMAP // google map type
;
map = new google.maps.Map(document.getElementById("google_map"),
googleMapOptions);
//Load Markers from the XML File, Check (map_process.php)
$.get("map_process.php", function (data)
$(data).find("marker").each(function ()
var name = $(this).attr('name');
var address = '<p>'+ $(this).attr('address') +'</p>';
var type = $(this).attr('type');
var point = new
google.maps.LatLng(parseFloat($(this).attr('lat')),parseFloat($(this).attr('lng')));
create_marker(point, name, address, false, false, false, "icons/pin_blue.png");
);
);
//Right Click to Drop a New Marker
google.maps.event.addListener(map, 'rightclick', function(event)
//Edit form to be displayed with new marker
var EditForm = '<p><div class="marker-edit">'+
'<form action="ajax-save.php" method="POST" name="SaveMarker" id="SaveMarker">'+
'<label for="pName"><span>Place Name :</span><input type="text" name="pName"
class="save-name" placeholder="Enter Title" maxlength="40" /></label>'+
'<label for="pDesc"><span>Description :</span><textarea name="pDesc" class="save-desc"
placeholder="Enter Address" maxlength="150"></textarea></label>'+
'<label for="pType"><span>Type :</span> <select name="pType" class="save-type"><option
value="restaurant">Rastaurant</option><option value="bar">Bar</option>'+
'<option value="house">House</option></select></label>'+
'</form>'+
'</div></p><button name="save-marker" class="save-marker">Save Marker
Details</button>';
//Drop a new Marker with our Edit Form
create_marker(event.latLng, 'New Marker', EditForm, true, true, true,
"icons/pin_green.png");
);
//############### Create Marker Function ##############
function create_marker(MapPos, MapTitle, MapDesc, InfoOpenDefault, DragAble,
Removable, iconPath)
//new marker
var marker = new google.maps.Marker(
position: MapPos,
map: map,
draggable:true,
animation: google.maps.Animation.DROP,
title:"Hello World!",
icon: iconPath
);
//Content structure of info Window for the Markers
var contentString = $('<div class="marker-info-win">'+
'<div class="marker-inner-win"><span class="info-content">'+
'<h1 class="marker-heading">'+MapTitle+'</h1>'+
MapDesc+
'</span><button name="remove-marker" class="remove-marker" title="Remove
Marker">Remove Marker</button>'+
'</div></div>');
//Create an infoWindow
var infowindow = new google.maps.InfoWindow();
//set the content of infoWindow
infowindow.setContent(contentString[0]);
//Find remove button in infoWindow
var removeBtn = contentString.find('button.remove-marker')[0];
var saveBtn = contentString.find('button.save-marker')[0];
//add click listner to remove marker button
google.maps.event.addDomListener(removeBtn, "click", function(event)
remove_marker(marker);
);
if(typeof saveBtn !== 'undefined') //continue only when save button is present
//add click listner to save marker button
google.maps.event.addDomListener(saveBtn, "click", function(event)
var mReplace = contentString.find('span.info-content');
//html to be replaced after success
var mName = contentString.find('input.save-name')[0].value; //name input field value
var mDesc = contentString.find('textarea.save-desc')[0].value; //description input
field value
var mType = contentString.find('select.save-type')[0].value; //type of marker
if(mName =='' || mDesc =='')
alert("Please enter Name and Description!");
else
save_marker(marker, mName, mDesc, mType,
mReplace); //call save marker function
);
//add click listner to save marker button
google.maps.event.addListener(marker, 'click', function()
infowindow.open(map,marker); // click on marker opens info window
);
if(InfoOpenDefault) //whether info window should be open by default
infowindow.open(map,marker);
//############### Remove Marker Function ##############
function remove_marker(Marker)
/* determine whether marker is draggable
new markers are draggable and saved markers are fixed */
//Remove saved marker from DB and map using jQuery Ajax
var mLatLang = Marker.getPosition().toUrlValue(); //get marker position
var myData = del : 'true', latlang : mLatLang; //post variables
$.ajax(
type: "POST",
url: "map_process.php",
data: myData,
success:function(data)
Marker.setMap(null);
alert(data);
,
error:function (xhr, ajaxOptions, thrownError)
alert(thrownError); //throw any errors
);
//############### Save Marker Function ##############
function save_marker(Marker, mName, mAddress, mType, replaceWin)
//Save new marker using jQuery Ajax
var mLatLang = Marker.getPosition().toUrlValue(); //get marker position
var myData = name : mName, address : mAddress, latlang : mLatLang, type :
mType ; //post variables
console.log(replaceWin);
$.ajax(
type: "POST",
url: "map_process.php",
data: myData,
success:function(data)
replaceWin.html(data); //replace info window with new html
Marker.setDraggable(true); //set marker to fixed
Marker.setIcon('icons/pin_blue.png'); //replace icon
,
error:function (xhr, ajaxOptions, thrownError)
alert(thrownError); //throw any errors
);
);
</script>
</head>
<body>
<h1 class="heading">My Google Map</h1>
<div align="center">Right Click to Drop a New Marker</div>
<div id="google_map"></div>
</body>
</html>
Map_process.php 代码
// database settings
$db_username = 'username';
$db_password = 'pass';
$db_name = 'db';
$db_host = 'my host';
//mysqli
$mysqli = new mysqli($db_host, $db_username, $db_password, $db_name);
if (mysqli_connect_errno())
header('HTTP/1.1 500 Error: Could not connect to db!');
exit();
################ Save & delete markers #################
if($_POST) //run only if there's a post data
//make sure request is comming from Ajax
$xhr = $_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest';
if (!$xhr)
header('HTTP/1.1 500 Error: Request must come from Ajax!');
exit();
// get marker position and split it for database
$mLatLang = explode(',',$_POST["latlang"]);
$mLat = filter_var($mLatLang[0], FILTER_VALIDATE_FLOAT);
$mLng = filter_var($mLatLang[1], FILTER_VALIDATE_FLOAT);
//Delete Marker
if(isset($_POST["del"]) && $_POST["del"]==true)
$results = $mysqli->query("DELETE FROM markers WHERE lat=$mLat AND lng=$mLng");
if (!$results)
header('HTTP/1.1 500 Error: Could not delete Markers!');
exit();
exit("Done!");
$mName = filter_var($_POST["name"], FILTER_SANITIZE_STRING);
$mAddress = filter_var($_POST["address"], FILTER_SANITIZE_STRING);
$mType = filter_var($_POST["type"], FILTER_SANITIZE_STRING);
$results = $mysqli->query("INSERT INTO markers (name, address, lat, lng, type)
VALUES ('$mName','$mAddress',$mLat, $mLng, '$mType')");
if (!$results)
header('HTTP/1.1 500 Error: Could not create marker!');
exit();
$output = '<h1 class="marker-heading">'.$mName.'</h1><p>'.$mAddress.'</p>';
exit($output);
################ Continue generating Map XML #################
//Create a new DOMDocument object
$dom = new DOMDocument("1.0");
$node = $dom->createElement("markers"); //Create new element node
$parnode = $dom->appendChild($node); //make the node show up
// Select all the rows in the markers table
$results = $mysqli->query("SELECT * FROM markers WHERE 1");
if (!$results)
header('HTTP/1.1 500 Error: Could not get markers!');
exit();
//set document header to text/xml
header("Content-type: text/xml");
// Iterate through the rows, adding XML nodes for each
while($obj = $results->fetch_object())
$node = $dom->createElement("marker");
$newnode = $parnode->appendChild($node);
$newnode->setAttribute("name",$obj->name);
$newnode->setAttribute("address", $obj->address);
$newnode->setAttribute("lat", $obj->lat);
$newnode->setAttribute("lng", $obj->lng);
$newnode->setAttribute("type", $obj->type);
echo $dom->saveXML();
非常感谢您的帮助:)
【问题讨论】：
【参考方案1】：您应该为标记添加一个偶数侦听器，该侦听器在标记被放下时触发。
// adds an event listener on the marker.
// The event is fired when the marker is dropped in this case
google.maps.event.addListener(marker, 'dragend', function()
alert('Marker dropped');
);
别忘了设置标记选项draggable:true
这里是 Marker 类的方法和事件的文档：google.maps.Marker
这里是jsFiddle的演示
【讨论】：
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