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.html#Marker * MarkerImage: http://code.google.com/apis/maps/documentation/javascript/reference.html#MarkerImage -- You received this message because you are subscribed to the Google Groups "Google Maps JavaScript API v3" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-maps-js-api-v3?hl=en.
