[ka-Map-users] PNG transparency in IE - some conclusions

[Paul Spencer]

Ehud,

sorry for the delay, I've applied your patches to cvs.

The opacity metadata changes the opacity of the layer using CSS in  
the client rather than in mapserver.

Cheers

Paul

On 28-Apr-06, at 2:52 AM, Ehud Shabtai wrote:

> I think these changes should be merged to CVS. They only affect layers
> with "imageformat = alpha", so I don't expect any regressions.
>
> Paul, what do you think?
>
> Pedro, how do you change the layer opacity? Through the map file?
>
> On 4/28/06, Pedro Garcia <pedro.gspace at gmail.com> wrote:
>> Ehud,
>>
>> Congratulations!!! PNG24 transparency is working in IE!!!
>> I tested in:
>>   * Windows XP SP2
>>   * IE 6.0
>>   * Firefox 1.5
>>   * ka-Map latest CVS version
>>
>> I tested with a map with 2 layers:
>>   1) A Ikonos raster image with 4m pixel resolution;
>>   2) A vector polygonal layer with labels and two
>>      metadata info, as you can see:
>>
>>     NAME "shpBairros"
>>     GROUP "Bairros"
>>     STATUS ON
>>     DATA "/ms4w/apps/MapaVix/Shapes/Bairros.shp"
>>     TYPE POLYGON
>>     UNITS METERS
>>     SIZEUNITS PIXELS
>>     LABELITEM "Text"
>>     TOLERANCE 0
>>     TOLERANCEUNITS PIXELS
>>     METADATA
>>       "imageformat"    "ALPHA"
>>       "opacity"    "80"
>>     END
>>
>> OBS: The full mapfile is attached.
>>
>> I can test it in Windows 2000 late.
>>
>>  Take a long time to translate your diffs to my local copy
>> to test it, so I'm attaching the modified files so others
>> can test it more easily.
>>
>> But I found a problem: when I try to change the vector layer
>> transparency, the layer disappears, but if I turn of, and turn
>> on after, the layer appears again. But I think you're going
>> in the right direction to the solution. Congratulations again,
>> with your code whe are next to solve the most critical
>> issue in ka-Map portability in my opinion.
>>
>> I'm attached 2 sreenshots, 1 with Firefox and other with IE,
>> and you can see clearly the transparency.
>>
>> regards,
>>
>> Pedro Garcia.
>>
>> 2006/4/11, Ehud Shabtai <eshabtai at gmail.com>:
>>>
>>  Jacob,
>>
>> I can't reproduce it.
>>
>> I'm using IE 6.0 which version do you use?
>>
>> Ehud.
>>
>> On 4/11/06, Delfos, Jacob <jacob.delfos at maunsell.com> wrote:
>>> Ehud,
>>>
>>> During panning, the whole map sometimes turns black. As soon as I  
>>> let go
>>> of the mouse, it becomes normal again. Sometimes if I let go of the
>>> mouse before it turns black, it becomes black once it finishes  
>>> loading,
>>> and turns normal when I press the mouse down.
>>>
>>> Also, when turning the satellite image off, and then on again, the
>>> entire page turns black once it has finished loading (see attached
>>> screenshot). This only happens in IE. Is it to do with the  
>>> application
>>> of the PNG-hack?
>>>
>>> Regards,
>>>
>>> Jacob
>>>
>>>
>>>> -----Original Message-----
>>>> From: ka-map-users-bounces at lists.maptools.org
>>>> [mailto:ka-map-users-bounces at lists.maptools.org] On
>> Behalf Of
>>>> Ehud Shabtai
>>>> Sent: 11 April 2006 14:57
>>>> To: Shoaib Burq
>>>> Cc: ka-Map-users at lists.maptools.org
>>>> Subject: Re: [ka-Map-users] PNG transparency in IE - some  
>>>> conclusions
>>>>
>>>
>>>
>>>
>>
>>
>> --
>> Ehud Shabtai
>> http://www.freemap.co.il/map/
>>
>> _______________________________________________
>> ka-Map-users mailing list
>>  ka-Map-users at lists.maptools.org
>> http://lists.maptools.org/mailman/listinfo/ka-map-users
>>
>>
>>
>
>
> --
> Ehud Shabtai
> http://www.freemap.co.il/map/

+-----------------------------------------------------------------+
|Paul Spencer                           pspencer at dmsolutions.ca   |
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|Applications & Software Development                              |
|DM Solutions Group Inc                 http://www.dmsolutions.ca/|
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