marker flicker bug

[Farooq Mahmood]

Hi,

I am getting a very strange behavior while changing the marker's icon
on mouse hover. Marker is changing its location as well on mouseover.
When I look at the change it seem like that this was a bug and has
been fixed on 3.1 Jun 17, 2010 (if it is the same issue).

I have a marker mentioning an earthquake in Afghanistan and on
mouseover this marker move to middle of India but on mouseout it move
back to Afghanistan. :)

Regards,
Farooq

[Rossko]

> I am getting a very strange behavior while changing the marker's icon
> on mouse hover. Marker is changing its location as well on mouseover.
> When I look at the change it seem like that this was a bug and has
> been fixed on 3.1 Jun 17, 2010 (if it is the same issue).

Don't shout 'bug' unless you can provide a demonstration
http://groups.google.com/group/google-maps-api/web/why-including-a-link-is-critical

As we can only guess, my guess is that you haven't set the image
anchor properties properly.

[Farooq Mahmood]

Thanks for the reply and sorry if you get offended, I think I have
mentioned everything thing quite clear in my post regarding the word
'bug'.

Regards,
Farooq

On Sep 24, 6:36 pm, Rossko <ros...@culzean.clara.co.uk> wrote:
> > I am getting a very strange behavior while changing the marker's icon
> > on mouse hover. Marker is changing its location as well on mouseover.
> > When I look at the change it seem like that this was a bug and has
> > been fixed on 3.1 Jun 17, 2010 (if it is the same issue).
>

> Don't shout 'bug' unless you can provide a demonstrationhttp://groups.google.com/group/google-maps-api/web/why-including-a-li...

[Luke Mahé]

Hey Farooq,

As Rossko said, it would really help if you could supply a link that demonstrates the problem you are having. 

It saves everyone having to do the work that you have already done and will most probably mean a quicker and more accurate response :)

Thanks!

-- Luke

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[Pil]

What browser are you using? Do you use a sprite image as marker icon?
A link to the problematic map would be a good idea.

I'm asking because there is a reproducable flicker bug with the icons
- but only in IE 6 and when using a sprite image for the marker icons.


http://www.wolfpil.de/v3/toggle-cats.html

This seems to be a CSS bug in IE 6 (well, just one of many others).
And since the v3 Maps API doesn't support IE 6 any more, I think it
shouldn't be fixed.

(Much too time-consuming for only the worst of all browsers.)

So the easiest solution would be in this case to use a separate icon
for all markers and a separate hover icon.

[Farooq Mahmood]

Rossko's guess was right It was anchor property problem. Here is the
code I am using to get the anchor.

function getImgAnchor(imgSrc){
var newImg = new Image();
newImg.src = imgSrc;
var x = newImg.width
var y = newImg.height;
var point = new google.maps.Point(x/2 , y/2);
alert(imgSrc + " : " + point);
return point;
}

Sometimes that var x and y are just 0, 0 even newImg.width and
newImg.height have different values e.g. (12, 12).
Anyway it is not a google maps issue rather than javascript issue.

Thanks Rossko for the perfect guess.

Regards,
Farooq

[Martin]

You'd probably need to create an 'onload' event for the image object
and get the image width and height AFTER it has loaded.

Martin.

[Farooq Mahmood]

hmmm.. Thanks Martin.