Develop Reference

Google map infowindow position on custom marker

I'm not using the Markers in Google Maps because I wish to render custom text and images on my marker, so what I did is a custom marker using Overlays.
The Overlay position is not exactly like the marker so I played a bit with it and now it is rendering exactly like a marker.
The problem now is the infowindow because it doesn't open on top of the overlay but exactly on the position of the overlay, I wish it to be on top of it, around 32px less on the top position.
Looking at the documentation it looks like the infowindow position is related to the object and on the LatLng, so how can I move it?
Here is the code I'm using:
var marker;
marker = new CustomMarker(markerPosition, map, {}); // custom marker is a class I wrote to prototype the overlay.
google.maps.event.addListener(marker, 'click', function() {
myInfowindow.open(map, marker);
});
Quite simple but unfortunately the infowindow is over the marker and not on top of it like if I use a marker.

Set the pixelOffset of the InfoWindow appropriately:
From the documentation on InfoWindows
pixelOffset | Type:Size | The offset, in pixels, of the tip of the info window from the point on the map at whose geographical coordinates the info window is anchored. If an InfoWindow is opened with an anchor, the pixelOffset will be calculated from the anchor's anchorPoint property.

Marker over Infobubble in google maps v3

I'm trying to put a google.maps.Marker object over (z-index positioning) an Infobubble object
but i am having no success.
Basically what i'm doing is assigning zIndex: n to the markerOptions object which I pass to the Marker constructor as follow:
var markerOptions = {
position: store.getLocation(),
title: store.getDetails().title,
icon: DEFAULT_MARKER,
anchorPoint: new google.maps.Point(20,5),
zIndex: 2
};
var marker = new google.maps.Marker(markerOptions);
I have already read this answer Google Maps v3 marker over infowindow but actually it has not got any votes. Can somebody tell me more about?
Thanks a lot

The problem, as commented by shaunhusain is the fixed pane where particular elements will be drawn.
It's correct that you need to use a custom overlay, but you must use it to draw the marker, not the infobubble.
The reason: infobubble is an implementation of a custom overlay, it will be drawn inside the floatPane. To put the marker on top the infobubble must be drawn into a pane with a zIndex equal or lower than the zIndex of the pane where the marker will be drawn.
But here comes the problem: all these panes do not receive mouse-events, you wouldn't be able to interact with the infobubble(select tabs, select text, click links, close the infobubble).
Therefore you must use a custom overlay to draw the markers, and you must put these overlays into the floatPane(it's the pane with the highest zIndex)

Marker Clusterer, cluster at 1 marker also

I am using marker clusterer with google maps. All is working very well but I would like to know how to cluster a marker even if there is only 1 marker with that grid. At the moment on page load you will see the odd marker darted around and others are within a clustered icon. I would like all even the single markers to display a cluster icon also.

Set the option minimumClusterSize to 1 (default is 2)
new MarkerClusterer(map, markers,{minimumClusterSize:1});

with openlayers , how do i make sure a list of points are all displayed?

I have an OpenLayers map object, and I have added markers to a layer, and added it to the map.
But how do I make sure all the markers are in the display area?
Thanks,
Gil

In order to display all markers on the map
Firstly,make sure you have all markers in one layer.
Secondly,you need to zoom to bound where all markers in marker layer are extended.
To do that,simply
var bounds = markerLayer.getDataExtent();
map.zoomToExtent(bounds);
//has a second parameter that decides to find closest zoom level
//default is false
Please check OpenLayers Document for Marker Layer
Best Regards
Myra

Google Maps: How does Trulia create their custom InfoWIndows?

I really like how Trulia.com has created their custom Google Map InfoWindows.
What I like in particular about Trulia's implementation of the InfoWindow is:
Extends beyond the map border: Google Maps InfoWindows are contained within the map border whereas Trulia's seems to be able to float on-top of the map
Always displays InfoWindow near map Center: Google Maps InfoWindows always display the InfoWindow above the marker whereas Trulia InfoWindows always display the InfoWindow as close the center of the map as possible. For example, if the map marker icon is on the top of the map near the border, the Trulia InfoWindow is displayed below the map marker icon
InfoWindow is displayed on mouse hover (not 'click'): With the default Google Maps InfoWindow, you have to 'click' the map marker icon to display the InfoWindow whereas Trulia InfoWindows are display simply by hovering over the map marker icon.
I found the PdMarker, which is a 3rd party extension for Google Map InfoWindows that accomplishes most of the above bullets but not all. 1) It does not extend beyond the map border, 2) it does not work with Google Maps API version 3 (only version 2).
Anyone know how Trulia is accomplishing their InfoWindow-like implementation on Google Maps API v3?

That's an interesting question. I've been playing with maps recently too. I'm far from expert but I can tell you what I know.
I think the site you mentioned uses a custom div overlay rather than google's info window.
1. InfoWindow is displayed on mouse hover (not 'click')
This can be done with event listeners. For example in maps API v3:
google.maps.event.addListener(marker, 'mouseover', function() {
// myDiv.style.visibility = 'visible'
});
google.maps.event.addListener(marker, 'mouseout', function() {
// myDiv.style.visibility = 'hidden'
});
Here's is a pretty good example of how this can be done.
2. Extends beyond the map border
3. Always displays InfoWindow near map Center
Both of these can be achieved using CSS: (2) using z-index and (3) with position.
There is a similar example of using custom marker tooltips which you can find here. It also shows how you can utilize mouseovers to pop-up tooltips by hovering other elements on your page.
myElement.onmouseover = function(){
google.maps.event.trigger(marker, 'mouseover');
}
myElement.onmouseout = function(){
google.maps.event.trigger(marker, 'mouseout');
}
Finally, another site that makes a good use of maps, although this one uses V2 of the API. Hope this helps.

http://google-maps-utility-library-v3.googlecode.com/svn/trunk/infobox/docs/examples.html
is an extension to google maps which allows you to create custom infowindows