javascript - 当现有的谷歌标记移动到另一个地方时，如何更新新的纬度和经度

Question

我正在使用谷歌地图在 map 上放置标记。标记的 GPS 坐标存储在 mySQL 数据库中。我已经能够在 map 上创建标记，所以我想知道当现有标记移动到另一个地方时如何用新的纬度和经度更新数据库这是到目前为止我的代码:

直播工作:http://creativeartbd.com/map/

<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('latitude')),parseFloat($(this).attr('longitude')));
                  create_marker(point, name, address, false, false, false, "icons/blue-icon.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/blue-icon.png'); //replace icon
        },
        error:function (xhr, ajaxOptions, thrownError){
            alert(thrownError); //throw any errors
        }
    });
}

function update_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_update.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/blue-icon.png'); //replace icon
        },
        error:function (xhr, ajaxOptions, thrownError){
            alert(thrownError); //throw any errors
        }
    });
}   

});
</script>

Answer 1

map_process.php 应返回已插入数据库的标记的 insert_id。

将此 ID 存储为 Marker 属性并将其传递给 update_marker() 中的 map_update.php ，然后您就可以更新通过使用 WHERE 子句中的 ID 来获取现有行