Google maps v3 draggable marker

Question

I'm new in google maps, and I'm trying to learn it.

marker = new google.maps.Marker(
{
     map:map,
     draggable:true,
     animation: google.maps.Animation.DROP,
     position: results[0].geometry.location
});

This is my marker position, when I'm initialising the marker position than I know the place name (for example: XY street, New York,), but because of the draggable option it is changing, and my question is how can I get the new place name, what event handler do I need.

Answer 1

Please follow below three steps to get drag-able marker with position in text box.

1. CSS

   <style> #map { height: 400px; width: 100%; } </style>

2. HTML

   <div id="map"></div> Latitude <input type="text" id="la" name="latitude" value="28.39" > Longitude<input type="text" id="lo" name="longitude" value="84.12" >

3. JavaScript

   <script> /** *Receiving the value of text box and type done conversion by Number() */ var latitude = Number(document.getElementById("la").value); var longitude = Number(document.getElementById("lo").value); function initMap() { /** *Passing the value of variable received from text box **/ var uluru = {lat: latitude, lng: longitude}; var map = new google.maps.Map(document.getElementById('map'), {zoom: 7,center: uluru} ); marker = new google.maps.Marker( { map:map, draggable:true, animation: google.maps.Animation.DROP, position: uluru } ); google.maps.event.addListener(marker, 'dragend', function(marker){ var latLng = marker.latLng; currentLatitude = latLng.lat(); currentLongitude = latLng.lng(); $("#la").val(currentLatitude); $("#lo").val(currentLongitude); } ); } </script> <!--Google Map API Link--> <script async defer src="https://maps.googleapis.com/maps/api/js?key=YOURAPIKEYHERE&callback=initMap"> </script>
   NOTE: Please Use Jquery at the head

Answer 2

Finally I found the answer:

marker = new google.maps.Marker(
{
    map:map,
    draggable:true,
    animation: google.maps.Animation.DROP,
    position: results[0].geometry.location
});
google.maps.event.addListener(marker, 'dragend', function() 
{
    geocodePosition(marker.getPosition());
});

function geocodePosition(pos) 
{
   geocoder = new google.maps.Geocoder();
   geocoder.geocode
    ({
        latLng: pos
    }, 
        function(results, status) 
        {
            if (status == google.maps.GeocoderStatus.OK) 
            {
                $("#mapSearchInput").val(results[0].formatted_address);
                $("#mapErrorMsg").hide(100);
            } 
            else 
            {
                $("#mapErrorMsg").html('Cannot determine address at this location.'+status).show(100);
            }
        }
    );
}

Answer 3

Set a Position on Map using lat/lang and make the marker draggable

• Using lat/lang initially sets a marker at the given point on the map

• The address variable is used for title purpose. It can be ignored.

• draggable:true makes the marker draggable.

• Use event listener google.maps.event.addListener(marker, 'dragend', function(marker) To listen for changes in the marker position

  function showMap(lat,lang,address) {
  var myLatLng = {lat: lat, lng: lang};
  
      var map = new google.maps.Map(document.getElementById('map_canvas'), {
        zoom: 17,
        center: myLatLng
      });
  
      var marker = new google.maps.Marker({
        position: myLatLng,
        map: map,
        title: address,
        draggable:true,
      });
  
      google.maps.event.addListener(marker, 'dragend', function(marker){
          var latLng = marker.latLng; 
          currentLatitude = latLng.lat();
          currentLongitude = latLng.lng();
          jQ("#latitude").val(currentLatitude);
          jQ("#longitude").val(currentLongitude);
       }); 
  }