[Chameleon] Internet Explorer and PNG?

Thijs Brentjens thijs.brentjens at geodan.nl
Fri Apr 1 08:56:05 EST 2005


Hi,

The problem still exists in IE, as far as I know. At least in a project of 
us we still have it. So Tyler, you didn't do anything wrong, but you could 
blaim IE if you'd like. There is a workaround (PNG Hack) however, although 
it costs some performance. You can find info on it here: 
http://www.mongus.net/pngInfo/.

To get it working in Chameleon, you should change (in pngHack.htc) the line:
      if ((src.indexOf("png") == -1) //...
  into:
      if ((src.indexOf(".png") == -1) && (src.indexOf("drawmap.php") == 
-1)) //..

And to make sure that the pngHack is used, add this to your template:

<link rel=stylesheet href="/pngHack/pngHack.css" type="text/css">

For our project it works (also for PNG24), hopefully it is of any use for 
you too.

regards,
Thijs

At 15:27 1-4-2005, Paul Spencer wrote:
>Tyler,
>
>I haven't noticed this behaviour in any of our apps.  I know that there 
>(were?) problems in IE with PNGs but I don't know if that would be 
>related?  Anyone else (Bart?) have any ideas?
>
>Paul
>
>Tyler Mitchell wrote:
>>I've been testing my app in Firefox. Now I'm looking at it in IE and it 
>>seems to have lost the transparency of the background images for my 
>>legend symbols.  Works fine with sample_enhanced.  Any cluse as to what I 
>>did wrong?  I'm using PNG24 in drawmap now. ??
>>Tyler
>>_______________________________________________
>>Chameleon mailing list
>>Chameleon at lists.maptools.org
>>http://lists.maptools.org/mailman/listinfo/chameleon
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