[Users] How to create legend panel using OpenLayers.Layer.MapServer layer...

[stela anders]

I updated GeoExt....
Worked fine now!

Thanks for the patience !

Stella

2010/1/11 Andreas Hocevar <ahocevar at opengeo.org>

> Hi,
>
> which version of GeoExt are you using? Providing imageFormat in defaults
> only works with current trunk. Version 0.6 had a different way of doing
> this.
>
> Regards,
> Andreas.
>
> stela anders wrote:
>
>> Thanks Andreas...
>>
>> The fact is :
>>  - Now I have all image symbol in png format
>>  - My mapfile is configured to generate PNG images
>>  - My legendPanel:
>>
>> var legendPanel = new GeoExt.LegendPanel({
>>        defaults: {                      style: 'padding:5px',
>>            imageFormat: "image/png"          },
>>        title: 'Legend',
>>        bodyStyle: 'padding:5px',
>>        width: 350,
>>        autoScroll: true        });
>>
>>
>> But the legend url generated my GeoExt is:
>>
>>
>> http://localhost/cgi-bin/mapserv.exe?MAP=Map.map&TRANSPARENT=true&FORMAT=image%2Fgif&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetLegendGraphic&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_xml&LAYER=Roads<
>> http://localhost/cgi-bin/mapserv.exe?MAP=Map.map&TRANSPARENT=true&FORMAT=image%2Fgif&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetLegendGraphic&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_xml&LAYER=Roads>
>>
>>
>> It is in GIF, why? If I manually change to "...&FORMAT=image%2Fpng" the
>> legend is generated fine...
>>
>> Any help?
>>
>> Thanks
>>
>> Stella
>>
>> 2010/1/8 Andreas Hocevar <ahocevar at opengeo.org <mailto:
>> ahocevar at opengeo.org>>
>>
>>    stela anders wrote:
>>
>>        Thanks Andreas... ;)
>>        displayInLayerSwitcher did the trick !!!
>>
>>        I have some point layer with image symbol (.gif - 16x15) ... The
>>        legend icon in that case stay ugly (only part of image appears)...
>>
>>
>>    Not a GeoExt issue for sure. GeoExt just loads the image and
>>    displays it in its original extent and dimensions. But you could
>>    define a png24 format in your mapfile, and configure your
>>    legendPanel with something like
>>
>>    defaults: {imageFormat: "image/png"}
>>
>>
>>        Any idea why that? Or maybe is a restriction?
>>
>>
>>    Again, you might want to ask about GetLegendGraphic on the mapserver
>>    users list or look in the mapserver docs.
>>
>>    Regards,
>>    Andreas.
>>
>>
>>        Thanks so much! U r saving my week ;)
>>
>>        Stella
>>
>>        2010/1/8 Andreas Hocevar <ahocevar at opengeo.org
>>        <mailto:ahocevar at opengeo.org> <mailto:ahocevar at opengeo.org
>>
>>        <mailto:ahocevar at opengeo.org>>>
>>
>>
>>           stela anders wrote:
>>
>>               Hello Andreas...
>>
>>               All sublayers is with status ON, they are draw on map,
>>        but in my
>>               legend I got ONLY "Layer1" label printed...
>>               My layers:
>>                             OpenLayers.Layer.WMS("Layer1",
>>                              mycgi, {
>>                                  map: mymapfile,
>>                                  layers: ['Sublayer11','Sublayer12',
>>               'Sublayer13'],
>>                                  format: "image/png",
>>                                  transparent: "true"
>>                              }, {
>>                                  isBaseLayer: true,
>>                              visibility: true
>>                              }),
>>
>>
>>           The above should cause three GetFeatureInfo requests to be
>>        issued:
>>           one for each of your sublayers. If you just see the label, then
>>           MapServer does not send you an image on the GetFeatureInfo
>>        request.
>>           Here is what you can try: enable the Net panel on firebug and
>>        look
>>           at the GetFeatureInfo request that the browser issues. Copy
>> them,
>>           open them in a browser window/tab, and fix your mapfile until
>>        they
>>           work (more help available in mapserver docs/lists).
>>
>>
>>                             OpenLayers.Layer.WMS("Layer2",
>>                              mycgi, {
>>                                  map: mymapfile,
>>                                  layers: ['Sublayer21','Sublayer22',
>>               'Sublayer23'],
>>                                  format: "image/png",
>>                                  transparent: "true"
>>                              }, {
>>                                  isBaseLayer: false,
>>                                  displayInLayerSwitcher: false,
>>                                  visibility: true
>>                              }),
>>
>>
>>           This won't display anything, because you have set
>>           "displayInLayerSwitcher" to false.
>>
>>               So, What is your suggestion in building a legend to Map with
>>               GeoExt sublayers? I need all sublayers appears on my legend
>>               (each one has different images...)
>>
>>
>>           The LegendPanel does exactly that. It requests one image per
>>           sublayer (now that you provided a code snippet and I finally
>> know
>>           what you meant by "sublayer"). My suggestion is: fix your
>>        mapfile so
>>           Mapserver can answer GetFeatureInfo requests correctly.
>>
>>           Regards,
>>           Andreas.
>>
>>           --    Andreas Hocevar
>>           OpenGeo - http://opengeo.org/
>>           Expert service straight from the developers.
>>
>>
>>
>>
>>    --    Andreas Hocevar
>>    OpenGeo - http://opengeo.org/
>>    Expert service straight from the developers.
>>
>>
>>
>
> --
> Andreas Hocevar
> OpenGeo - http://opengeo.org/
> Expert service straight from the developers.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.geoext.org/pipermail/users/attachments/20100111/064f30d1/attachment-0001.htm