Is it the pixel coordinates you are after for the anchor location?
This might help.
var containerHelper = null;//set in global space
//call this somewhere in your map init function to create an overlay
that you can use to translate the coordinates
function init_helper_container(){
containerHelper = null;
containerHelper = new google.maps.OverlayView();
containerHelper.setMap(map);
containerHelper.draw = function () {
if (!this.ready) {
this.ready = true;
google.maps.event.trigger(this, 'ready');
}
};
}
...
google.maps.event.addListener(marker, 'click', function() {
var markerLoc =
containerHelper.getProjection().fromLatLngToContainerPixel(this.getPosition());
alert('x=' + markerLoc.x + ', y=' + markerLoc.y);
});
On Nov 19, 12:26 pm, Peter van der Zee <[email protected]> wrote:
> I'm trying to port my marker cluster script (http://cm.qfox.nl) from
> v2 to v3 but it seems that's pretty much impossible because the api
> doesn't expose enough details.
>
> The biggest problem seems to be getting the actual size of the marker
> and the anchor of the marker. I've searched the group, but can't
> really find related posts (which was surprising to me).
>
> Basically I need to know precisely what area of the map is covered by
> a given marker in order to compare these regions to each other.
> However, there are is no api to give me this information.
>
> So this is what I have right now...
>
> An icon can be set by .setIcon* (or implicitly through the
> constructor, but I'm going to assume both ways lead to the same
> result). This method accepts a string or a MarkerImage*. The .getIcon
> method of a marker returns whatever you give it, it is not normalized
> (quite annoying). The .getShape method is not set implicitly, so it's
> useless in this case.
>
> Ok, so .getIcon returns a string (the url of the icon) or the
> MarkerImage. If it's the url, you can load it in an Image and get the
> width/height after it's loaded. Easy enough.
>
> If it returns the MarkerImage, things get hairy. That object should
> have a coords property. I checked, it's not set. It does have five
> properties. Four of them are scrambled by the minifiers, but their
> values clearly show that they are the properties as given in the
> constructor. The other one is obviously anchor, which is undocumented
> but also unscrambled (which is hardly coincidental). Maybe it's just
> missing from the documentation, who knows. Of the five properties, one
> is type string. Two are points and two are sizes. Since anchor is a
> point, you can also infer the origin, which is "point"less.
>
> So since I can get at least the url from MarkerImage, albeit through a
> hack, I can reasonably reliably get the size of the image used for the
> marker. It's not the end-goal, but at least it's something.
>
> So my question is, am I overlooking anything here? I'd like to get the
> anchor and final size of the image used for a marker when a
> MarkerImage is supplied for an icon, rather than a regular string. As
> it stands now, that seems impossible. Any help?
>
> But as it stands it seems impossible to create a generic cluster
> manager. You can make it safe for when .getIcon returns a string, but
> when it doesn't you're pretty much screwed.
>
> *
> Marker:http://code.google.com/apis/maps/documentation/javascript/reference.h...
> *
> MarkerImage:http://code.google.com/apis/maps/documentation/javascript/reference.h...
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