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

[Ehud Shabtai]

On 4/28/06, Paul Spencer <pspencer at dmsolutions.ca> wrote:

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

Thanks Paul.

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

Thanks for the tip, I'll see if I can figure out why lines are
disappearing when opacity is used.

> 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   |
> +-----------------------------------------------------------------+
> |Applications & Software Development                              |
> |DM Solutions Group Inc                 http://www.dmsolutions.ca/|
> +-----------------------------------------------------------------+
>
>
>
>
>


--
Ehud Shabtai
http://www.freemap.co.il/map/