Develop Reference

latLng returns null - Google maps javascript API

Ok so here is the file. It was working some days ago. I haven't really changed anything so i do not know why latLng does not work now.
here is my code
function map_initialize() {
var googleMapOptions = {
center: mapCenter, // map center
zoom: 17, //zoom level, 0 = earth view to higher value
maxZoom: 18,
minZoom: 10,
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);
console.log(map);
//Right Click to Drop a New Marker
google.maps.event.addListener(map, 'rightclick', function(event) {
//Drop a new Marker with location Form
create_marker(event.latLng, 'New Marker', true, true, true);
});
when i console.log(event.latLng); it returns an empty object.

console.log(event.latLng.lat());
tried with mousedown listener , it works

Why have I click twice on a marker on FireFox? [duplicate]

I have a map, and I draw a rectangle on it. Here is what I want: whenever my mouse enter that rectangle, open an infowindow, when my mouse leave, close the infowindow.
I have successfully created a map and drawn a rectangle. Here is my code:
var map;
function initialize() {
// Init map
var mapOptions = {
center: { lat: ***, lng: *** },
zoom: 13,
draggable: false,
scrollwheel: false,
zoomControl: false,
streetViewControl: false,
mapTypeControl: false,
disableDoubleClickZoom: true
};
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
google.maps.event.addListenerOnce(map, 'bounds_changed', function () {
drawGrid();
});
} // end initialize
function drawGrid() {
var rectangle = new google.maps.Rectangle({
strokeColor: '#000',
strokeWeight: 2,
fillOpacity: 0,
map: map,
bounds: new google.maps.LatLngBounds(sw1, ne1) //sw1 and ne1 is my variable
});
var infowindow = new google.maps.InfoWindow({
content: "Hello",
position: rectangle.getBounds().getCenter()
});
google.maps.event.addListener(rectangle, 'mouseover', function () {
infowindow.open(map);
});
google.maps.event.addListener(rectangle, 'mouseout', function () {
infowindow.close();
});
}
google.maps.event.addDomListener(window, 'load', initialize);
You can see the result below. The rectangle is the black one.
Now, the problems are:
Mouseover event is fired only when I let my mouse follow the green arrows.
Mouseout event is fired only when my mouse follow the green arrows (yes, from out to in, not in to out as expected), and it's fired twice.
Why do I encounter those problems? What did I do wrong? How to solve this problem? Thank you so much for your help.

There was a change to the way Firefox 39.0 handles mouse events. See issue 8278 in the issue tracker
Project Member #4 enoch...#google.com
Thanks for reporting this issue. Indeed, it appears that Firefox 39 has made changes to its mouse event, which is causing the API to behave incorrectly.
Status: Accepted
Owner: enoch...#google.com
Labels: Internal-20820906
Note that users have reported that v=3 (the release version) is working correctly and this issue only appears in v=3.exp (the "experimental" version).

Maps API v3: New InfoWindow, with pixelOffset, w/ data from KML.

Hello: I'm making progress on my Google Map (see my previous post: KML markers missing on Google Maps API v3: What's wrong?), but I'm now stuck, and hoping for help.
My custom-styled map pulls from a KML file with about 20 Placemarks.
For design reasons, I want my Placemarks to open on the RIGHT side of the anchor, rather than the default top/center. I've tried searching in vain for a simple way to do this; closest I've come is: Issue with infowindows remaining active when another KML layer is selected - Google Maps API V3, which I can't make work for me.
Here is an example of what I'm looking for: http://nationaltreasures.aircanada.com/ (its InfoWindows open to right).
I think I need to supress the default InfoWindow, create my own that pulls the KML data, and then specify a pixelOffset to my custom InfoWindow, but I can't figure out how to do it.
Thank you in advance!
function initialize() {
var styles = [ ]; // Styles removed to simplify code
var styledMap = new google.maps.StyledMapType(styles,
{name: "HEPAC"});
var mapOptions = {
zoom: 7,
center: new google.maps.LatLng(46.69504, -67.69751),
panControl: false,
mapTypeControl: false,
streetViewControl: false,
noClear: true,
zoomControlOptions: {
position: google.maps.ControlPosition.TOP_RIGHT
},
mapTypeControlOptions: {
mapTypeIds: ['map_style', google.maps.MapTypeId.ROADMAP]
}
};
google.maps.visualRefresh = true;
var map = new google.maps.Map(document.getElementById("map-canvas"),mapOptions);
map.mapTypes.set('map_style', styledMap);
map.setMapTypeId('map_style');
var opt = { minZoom: 7, maxZoom: 9 }; // Sets minimum & maximum zoom level
map.setOptions(opt);
var ctaLayer = new google.maps.KmlLayer({
url: 'http://hepac.ca/wp-content/mapping/wellnessnetworksl.kml?f=3',
preserveViewport: true,
});
ctaLayer.setMap(map);
}
google.maps.event.addDomListener(window, 'load', initialize);

Thanks to #SeanKendle for pointing me in the right direction. Found more or less what I wanted by adding this into my original code.
google.maps.event.addListener(ctaLayer, 'click', function(kmlEvent) {
showInContentWindow(kmlEvent.latLng, kmlEvent.featureData.description);
});
function showInContentWindow(position, text) {
var content = "<div>" + text + "</div>";
var infowindow = new google.maps.InfoWindow({
content: content,
position: position,
pixelOffset: new google.maps.Size(300, 0),
})
infowindow.open(map);
}

antyrat posted about this with an infoWindow to the right of the marker here:
Googlemap custom infowindow
See the link in the accepted answer.
EDIT: Here's an example. Obviously you will want to include InfoBox.js on your page to get access to that plugin. I hope this works, I didn't test it, but it might point you in the right direction:
function initialize() {
var styles = [ ]; // Styles removed to simplify code
var styledMap = new google.maps.StyledMapType(styles,
{name: "HEPAC"});
var mapOptions = {
zoom: 7,
center: new google.maps.LatLng(46.69504, -67.69751),
panControl: false,
mapTypeControl: false,
streetViewControl: false,
noClear: true,
zoomControlOptions: {
position: google.maps.ControlPosition.TOP_RIGHT
},
mapTypeControlOptions: {
mapTypeIds: ['map_style', google.maps.MapTypeId.ROADMAP]
}
};
google.maps.visualRefresh = true;
var map = new google.maps.Map(document.getElementById("map-canvas"),mapOptions);
map.mapTypes.set('map_style', styledMap);
map.setMapTypeId('map_style');
var opt = { minZoom: 7, maxZoom: 9 }; // Sets minimum & maximum zoom level
map.setOptions(opt);
var ctaLayer = new google.maps.KmlLayer({
url: 'http://hepac.ca/wp-content/mapping/wellnessnetworksl.kml?f=3',
preserveViewport: true,
});
ctaLayer.setMap(map);
google.maps.event.addListener(ctaLayer, 'click', function(kmlEvent) {
var text = kmlEvent.featureData.description; // ALTER THIS TO POINT TO THE DATA YOU WANT IN THE INFOBOX
var infoBox = new InfoBox({content: text, latlng: kmlEvent.position, map: map});
});
}
Google Maps API says:
Additionally, a click on a KML feature generates a KmlMouseEvent,
which passes the following information:
position indicates the latitude/longitude coordinates at which to anchor the InfoWindow for this KML feature. This position is generally
the clicked location for polygons, polylines, and GroundOverlays, but
the true origin for markers.
pixelOffset indicates the offset from the above position to anchor the InfoWindow "tail." For polygonal objects, this offset is typically
0,0 but for markers includes the height of the marker.
featureData contains a JSON structure of KmlFeatureData.
See this page for more info: KML Feature Details

Enable scrollwheel zooming on a map upon click using Google Maps API

I am using the Google Maps API, and wanted to be able to scroll past the map on a mobile device and not have the map zoom when scrolling down a webpage using the scrollwheel.
Here's my code:
var mapOptions = {
center: new google.maps.LatLng(51.605139, -2.918567),
zoom: 15,
scrollwheel: false,
draggable: false,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
This is fine but what I would like to achieve is to enable scrollwheel zooming only when the map was clicked.
(So on a webpage, when I click the map, I can zoom on it, or a mobile device, when I tap the screen on, then I can pinch and zoom/drag the map around.)
Can I add an event listener to activate draggable only upon double click or single click?
Is it possible using the API?
EDIT
I have tried the following code, but it doesn't seem to work:
google.maps.event.addListener(map, 'click', function (event) {
var mapOptions = {
draggable: true,
};
});

This should work:
google.maps.event.addListener(map, 'click', function(event){
this.setOptions({scrollwheel:true});
});

google.maps.event.addListener(map, 'mouseout', function(event){
this.setOptions({scrollwheel:false});
});
this is a handy little consideration in addition to Dr.Molle's answer.
just as it appears, this will re-disable scrollwheel zooming when the mouse leaves the map.

This is what I generally do:
User interacts with the map (mousedown) -> set zoomable
Mouse rests on the map for over 1 second -> set zoomable
Mouse goes out of the map -> set not zoomable
This usually gets the work done. When the user is in the mindset of scrolling the page, the map follows.
When the user wants to zoom in/out they need to interact with it or have the pointer there for a short while.
The source code:
google.maps.event.addListener(map, 'mousedown', function(event){
this.setOptions({scrollwheel:true});
});
google.maps.event.addListener(map, 'mouseover', function(event){
self = this;
timer = setTimeout(function() {
self.setOptions({scrollwheel:true});
}, 1000);
});
google.maps.event.addListener(map, 'mouseout', function(event){
this.setOptions({scrollwheel:false});
clearTimeout(timer);
});

I found a solution and gathered complete code for disabling scroll on load and enable scroll zoom on click.
Disable scroll on load: scrollwheel: false,
Listen to click event on map and enable scrollwheel: true,
map.addListener('click', function() {
map.set('scrollwheel', true);
});
Please find the code in my blog: http://anasthecoder.blogspot.ae/

According to official google documentation, to make it work perfectly fine for mobile and website use this:
var map = new google.maps.Map(document.getElementById(mapid), {
gestureHandling: 'greedy',
});

This is my example and it works for me. When page loads, google map (wheel scroll) is off, when you click on map (wheel scroll) turned on.
var map = new google.maps.Map(document.getElementById('map-id'), {
scrollwheel: false,
});
google.maps.event.addListener(map, 'mouseout', function(){
this.setOptions({scrollwheel:false});
});
map.addListener('click', function() {
map.set('scrollwheel', true);
});

this will set map, on click of map if the scrollwheel value is false it will make it true, & if true will make false.
function initMap() {
var florida = {
lat: 27.5814346,
lng: -81.0534459
};
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 6,
center: florida,
scrollwheel: false
});
google.maps.event.addListener(map, 'click', function(event) {
if (this.scrollwheel == false) {
this.setOptions({
scrollwheel: true
});
} else {
this.setOptions({
scrollwheel: false
});
}
});
}

Removing all controls from a google map

I am trying to remove all the controls (zoom, map type drop down, and street view) from my map.
There's a method
map.removeControl(GControl)
but I haven't been able to successfully remove any default ones that I hadn't added myself.
Any tips on remove/clearing all controls from the map?

Have you tried this:
http://code.google.com/apis/maps/documentation/javascript/controls.html#DisablingDefaults
function initialize() {
var myOptions = {
zoom: 4,
center: new google.maps.LatLng(-33, 151),
disableDefaultUI: true,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
}

You may see this: google map api by w3schools
As you see in the link, this disables all controls:
var mapOptions = {disableDefaultUI: true}
and the bellow is the options to make them enabled or disabled.
var mapOptions = {
panControl: true,
zoomControl: true,
mapTypeControl: true,
scaleControl: true,
streetViewControl: true,
overviewMapControl: true,
rotateControl: true
}

just disableDefaultUI: true
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 4,
center: {lat: -33, lng: 151},
disableDefaultUI: true
});
}

I believe you can create a copy of the GMapUIOptions object and then remove the items you don't want to appear.
From http://code.google.com/apis/maps/documentation/javascript/v2/controls.html#MapUIOptions
"Using the GMapUIOptions Object
The GMapUIOptions object contains a set of properties that specify control placement and UI behavior, which you may modify. For a full set of properties, see the GMapUIOptions reference.
Rather than write a GMapUIOptions structure from scratch, you may wish to prepopulate it with the UI behavior available on Google Maps. To do so, use the GMap2.getDefaultUI() method. Once populated, you can modify individual properties to tweak the behavior and initialize the map's UI controls using the GMap2.setUI() method.
The following code retrieves the default UI on a "large" map, removes the GScaleControl and resets the map to use the modified UI.
map = new GMap2(document.getElementById("map_canvas"),
{ size: new GSize(400,150) } );
map.setCenter(new GLatLng(41.897997,-87.790203), 11);
var customUI = map.getDefaultUI();
customUI.controls.scalecontrol = false;
map.setUI(customUI);
"