Develop Reference

Draggable pin not updating coordinates in Google Maps API

I have this code that allows users to insert pins in Google Maps, by clicking on the map. Now I'm trying to make this pin draggable, so I just added draggable:true, in the initialization of the markers. But this is not updating the field with the coordinates. It only works if the user clicks in another place. What am I missing?
// global "map" variable
var map = null;
var marker = null;
// popup window for pin, if in use
var infowindow = new google.maps.InfoWindow({
size: new google.maps.Size(150,50)
});
// A function to create the marker and set up the event window function
function createMarker(latlng, name, html) {
var contentString = html;
var marker = new google.maps.Marker({
position: latlng,
map: map,
zIndex: Math.round(latlng.lat()*-100000)<<5
});
google.maps.event.addListener(marker, 'click', function() {
infowindow.setContent(contentString);
infowindow.open(map,marker);
});
google.maps.event.trigger(marker, 'click');
return marker;
}
function initialize() {
// the location of the initial pin
var myLatlng = new google.maps.LatLng(-19.919131, -43.938637);
// create the map
var myOptions = {
zoom: 15,
center: myLatlng,
mapTypeControl: true,
mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.DROPDOWN_MENU},
navigationControl: true,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
// establish the initial marker/pin
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title:"Property Location",
draggable:true,
icon: {
url: 'https://4.bp.blogspot.com/-nHydF9OdHLw/V8OxZbpJW6I/AAAAAAAAADM/G_QLEm7aScUOc3XwZmc5X8DmMHp7FK3RwCLcB/s1600/BikeSpot-Pin-Logo.png',
// base image is 60x60 px
size: new google.maps.Size(64, 96),
// we want to render # 30x30 logical px (#2x dppx or 'Retina')
scaledSize: new google.maps.Size(32, 48),
// the most top-left point of your marker in the sprite
// (based on scaledSize, not original)
origin: new google.maps.Point(0, 0),
// the "pointer"/anchor coordinates of the marker (again based on scaledSize)
anchor: new google.maps.Point(16, 48)
}
});
// establish the initial div form fields
formlat = myLatlng.lat();
formlng = myLatlng.lng();
document.getElementById("LatLng-Input").value = myLatlng.toUrlValue();
// close popup window
google.maps.event.addListener(map, 'click', function() {
infowindow.close();
});
// removing old markers/pins
google.maps.event.addListener(map, 'click', function(event) {
//call function to create marker
if (marker) {
marker.setMap(null);
marker = null;
}
// Information for popup window if you so chose to have one
/*
marker = createMarker(event.latLng, "name", "<b>Location</b><br>"+event.latLng);
*/
var image = 'https://4.bp.blogspot.com/-nHydF9OdHLw/V8OxZbpJW6I/AAAAAAAAADM/G_QLEm7aScUOc3XwZmc5X8DmMHp7FK3RwCLcB/s1600/BikeSpot-Pin-Logo.png';
var myLatLng = event.latLng ;
/*
var marker = new google.maps.Marker({
by removing the 'var' subsquent pin placement removes the old pin icon
*/
marker = new google.maps.Marker({
position: myLatLng,
map: map,
icon: image,
title:"Bicicletario",
icon: {
url: 'https://4.bp.blogspot.com/-nHydF9OdHLw/V8OxZbpJW6I/AAAAAAAAADM/G_QLEm7aScUOc3XwZmc5X8DmMHp7FK3RwCLcB/s1600/BikeSpot-Pin-Logo.png',
// base image is 60x60 px
size: new google.maps.Size(64, 96),
// we want to render # 30x30 logical px (#2x dppx or 'Retina')
scaledSize: new google.maps.Size(32, 48),
// the most top-left point of your marker in the sprite
// (based on scaledSize, not original)
origin: new google.maps.Point(0, 0),
// the "pointer"/anchor coordinates of the marker (again based on scaledSize)
anchor: new google.maps.Point(16, 48)
}
});
// populate the form fields with lat & lng
formlat = event.latLng.lat();
formlng = event.latLng.lng();
document.getElementById("LatLng-Input").value = formlat +", "+formlng
});
}
});
}
The HTML with the input I'm receiving the coordinates is:
<div id='map_canvas'/>
<input id='LatLng-Input' size='20' type='text'/>

It's not updating the coordinates because you don't tell it to do so. You have to add a dragend-handler and update your element, where you display the coordinates when the drag of the marker is finished:
marker.addListener('dragend', function(event){
document.getElementById("LatLng-Input").value = event.latLng.lat() + ", " + event.latLng.lng();
});
If you would have an infowindow you would have to update the content of the infowindow:
marker.addListener('dragend', function(event){
infoWindow.setContent(event.latLng.lat() + ", " + event.latLng.lng());
});
If you want to update the coordinates also while dragging, add another handler with 'drag' instead of 'dragend'.

How to get coordinates of outside element dropped on a google map?

I have a google map and a custom element to use as a marker. When I drop the marker from outside the map on the map I need to get the coordinates of that location. How to do this?
".clue_bottom_left img" is the element used as the marker.
Code for drag and drop using jquery-ui:
$(".clue_bottom_left img").draggable({
containment: 'map',
revert: "invalid",
start: function(evt, ui) {
$('.clue_bottom_left img').fadeTo('fast', 0.6, function() {});
},
stop: function(evt, ui) {
$('.clue_bottom_left img').fadeTo('fast', 1.0, function() {});
// INSERT Point
}
});
$('#map').droppable({
drop: function(e, ui) {
$(ui.draggable).draggable();
}
});
Code for creating the map:
function initAutocomplete() {
var map = new google.maps.Map(document.getElementById('map'), {
center: {lat: 41.9876644, lng: 22.4192234},
zoom: 6,
mapTypeId: google.maps.MapTypeId.ROADMAP,
disableDefaultUI: true, // a way to quickly hide all controls
});
// Create the search box and link it to the UI element.
var input = document.getElementById('pac-input');
var searchBox = new google.maps.places.SearchBox(input);
map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);
// Bias the SearchBox results towards current map's viewport.
map.addListener('bounds_changed', function() {
searchBox.setBounds(map.getBounds());
});
var markers = [];
// Listen for the event fired when the user selects a prediction and retrieve
// more details for that place.
searchBox.addListener('places_changed', function() {
var places = searchBox.getPlaces();
if (places.length == 0) {
return;
}
// Clear out the old markers.
markers.forEach(function(marker) {
marker.setMap(null);
});
markers = [];
// For each place, get the icon, name and location.
var bounds = new google.maps.LatLngBounds();
places.forEach(function(place) {
var icon = {
url: place.icon,
size: new google.maps.Size(71, 71),
origin: new google.maps.Point(0, 0),
anchor: new google.maps.Point(17, 34),
scaledSize: new google.maps.Size(25, 25)
};
// Create a marker for each place.
markers.push(new google.maps.Marker({
map: map,
icon: icon,
title: place.name,
position: place.geometry.location
}));
if (place.geometry.viewport) {
// Only geocodes have viewport.
bounds.union(place.geometry.viewport);
} else {
bounds.extend(place.geometry.location);
}
});
map.fitBounds(bounds);
});
}
UPDATE:
This is not a duplicate as someone marked it with another post on how to do something when the marker is dropped on the map. I know how to do that. My marker is not actually a marker. Is a image in a div outside the map. And I wondered how to use that image as a marker using drag and drop with jQuery UI.

Add multiple event listener on google map API v3 AND MarkerWithLabel

I want to add, for each of my markers, an event on click to center on this one. I use the lib "MarkerWithLabel" and when I click on a marker, the map is zooming on the last marker each time.
Here is my code :
var map = new google.maps.Map(document.getElementById('map-canvas')),
bounds = new google.maps.LatLngBounds(),
marker = [],
grafxUrl = $('#map-canvas').data('grafx'),
image = {
url : grafxUrl + 'universal/icons/pin_locator.png',
size: new google.maps.Size(24, 31),
origin: new google.maps.Point(0,0),
anchor: new google.maps.Point(12, 31)
};
for (var i = 0; i < response.length; i++) {
marker = new MarkerWithLabel({
position: new google.maps.LatLng(response[i].fLatitude, response[i].fLongitude),
map: map,
icon : image ,
title : (i+1)+' '+response[i].sName,
labelContent: (i+1),
labelAnchor: new google.maps.Point(3, 25),
labelClass: "markerNum", // the CSS class for the label
});
google.maps.event.addListener(marker, 'click', function() {
map.setZoom(15);
map.setCenter(marker.position);
});
bounds.extend(marker.position);
//now fit the map to the newly inclusive bounds
map.fitBounds(bounds);
}
What is wrong with my script ?
Thanks a lot.

Here is a complete example on how to extend a bounds object to display all markers on the map.
function initialize() {
var southWest = new google.maps.LatLng(40.744656, -74.005966);
var northEast = new google.maps.LatLng(34.052234, -118.243685);
var lngSpan = northEast.lng() - southWest.lng();
var latSpan = northEast.lat() - southWest.lat();
var map = new google.maps.Map(document.getElementById("map-canvas"), {
zoom: 12,
center: new google.maps.LatLng(0, 0),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
// Create the bounds object
var bounds = new google.maps.LatLngBounds();
// Create random markers
for (var i = 0; i < 100; i++) {
// Calculate a random position
var position = new google.maps.LatLng(southWest.lat() + latSpan * Math.random(), southWest.lng() + lngSpan * Math.random());
var marker = new google.maps.Marker({
position: position,
map: map
});
google.maps.event.addListener(marker, 'click', (function (marker, i) {
return function () {
map.setZoom(5);
map.setCenter(marker.position);
}
})(marker, i));
// Extend the bounds with the last marker position
bounds.extend(position);
}
// Fit map to the extended bounds
map.fitBounds(bounds);
}
initialize();
This creates 100 random markers within the defined bounds (southWest / northEast coords) then extends a bounds object and finally fit the map to this bounds object. See how the marker variable is defined (within the for loop) and how the fitBounds() is called (outside the for loop). The same should apply to your code.
Below is a working demo. Hope this helps!
JSFiddle demo

Removing/Resetting all bounds/markers from searchBar function

I'm using a searchBar function that I found on the GoogleMaps documentation which works like a charm for it's purpose, however the reason I'm using it is because I want users to be able to capture that GoogleMap as an image (Which I know how to do using HTML2Canvas)
The issue I'm having is that when I use the SearchBar function for some reason it seems to make the bounds "stick" to the bounds that were applied when the SearchBar is used, so when I try and render the canvas of the Google Map is viewport of the render stays the same as when the SearchBox was used, but the actual rendered image is in the location relative to the SearchBox viewport (You can see what I mean in the images below).
Image after SearchBar use:
Image when rendered near SearchBar viewport (this image was rendered when I was NW of the marker for the PostCode, the bottom-right corner of the area with an image in was the bottom-right of the visible area when starting the render):
As you can see above, the actual viewport of the image is the same in each. This leads me to believe that there is some form of issue with the bounds set in the SearchBox code shown below:
JavaScript:
var map;
var markers = [];
function initialize() {
var mapOptions = {
center: { lat: 54.559322, lng: -4.174804},
zoom: 6,
mapTypeId: google.maps.MapTypeId.HYBRID,
panControl: true,
mapTypeControl: false,
scaleControl: true
};
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
var input = (document.getElementById('pac-input'));
map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);
var searchBox = new google.maps.places.SearchBox(input);
google.maps.event.addListener(searchBox, 'places_changed', function() {
var places = searchBox.getPlaces();
if (places.length == 0) {
return;
}
for (var i = 0, marker; marker = markers[i]; i++) {
marker.setMap(null);
}
markers = [];
var bounds = new google.maps.LatLngBounds();
for (var i = 0, place; place = places[i]; i++) {
var image = {
url: place.icon,
size: new google.maps.Size(71, 71),
origin: new google.maps.Point(0, 0),
anchor: new google.maps.Point(17, 34),
scaledSize: new google.maps.Size(25, 25)
};
var marker = new google.maps.Marker({
map: map,
icon: image,
title: place.name,
position: place.geometry.location
});
markers.push(marker);
bounds.extend(place.geometry.location);
}
map.fitBounds(bounds);
});
}
What I think needs to be done is to remove/reset the bound information set in the SearchBox function when I run the render, but any information you can provide will be greatly appreciated!
Regards,
Chris

Multiple Google Maps infowindow

Current I have a google maps that will display some markers on the map from my DB... I would like to add a infowindow when the users click on the marker.
I got it to work, but the problem is that it only display on the last marker that was loaded, why is that?
Here is the code to generate the marker and the infowindow.
<script type="text/javascript">
function initialize() {
var myOptions = {
zoom: 3,
center: new google.maps.LatLng(41.850033, -87.6500523),
disableDefaultUI: true,
navigationControl: true,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
setMarkers(map, offices);
}
/**
* Data for the markers consisting of a name, a LatLng and a zIndex for
* the order in which these markers should display on top of each
* other.
*/
var offices = [<cfoutput>#officeList#</cfoutput>];
function setMarkers(map, locations) {
// Add markers to the map
// Marker sizes are expressed as a Size of X,Y
// where the origin of the image (0,0) is located
// in the top left of the image.
// Origins, anchor positions and coordinates of the marker
// increase in the X direction to the right and in
// the Y direction down.
var image = new google.maps.MarkerImage('images/pin.png',
// This marker is 20 pixels wide by 32 pixels tall.
new google.maps.Size(14, 26),
// The origin for this image is 0,0.
new google.maps.Point(0, 0),
// The anchor for this image is the base of the flagpole at 0,32.
new google.maps.Point(0, 32));
for (var i = 0; i < locations.length; i++) {
var office = locations[i];
var myLatLng = new google.maps.LatLng(office[1], office[2]);
var marker = new google.maps.Marker({
position: myLatLng,
map: map,
icon: image,
title: office[0],
zIndex: office[3]
});
var contentString = "Hello!!!";
var infowindow = new google.maps.InfoWindow({
content: contentString
});
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(map, marker);
});
}
}
</script>

I've also stumbled across this problem.
Here's how I fixed it:
I used a function to bind a marker to an infowindow.
var marker = new google.maps.Marker({
position: myLatLng,
map: map,
icon: image,
title: office[0],
zIndex: office[3]
});
var contentString = "Hello!!!";
var infowindow = new google.maps.InfoWindow;
bindInfoW(marker, contentString, infowindow);
}
function bindInfoW(marker, contentString, infowindow)
{
google.maps.event.addListener(marker, 'click', function() {
infowindow.setContent(contentString);
infowindow.open(map, marker);
});
}

http://www.codefx.biz/2011/01/google-maps-api-v3-multiple-infowindows
this way also works!