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

[Andreas Hocevar]

On 2010-01-06 18:00, stela anders wrote:
> Yeah! Thats it Andreas!
>
> That LegendPanel works with sublayers? I´m a little bit confused right
> now!

The LegendPanel currently supports one image per layer. GeoServer's
GetLegendGraphic e.g. returns images with symbols and text for all rules
of the SLD that was used to render the layer. I think the same is true
for MapServer, but maybe a MapServer user can give more detail about
what its GetLegendGraphic returns.

Regards,
Andreas.


>
> Thanks !
>
>
>
> 2010/1/6 Andreas Hocevar <ahocevar at opengeo.org
> <mailto:ahocevar at opengeo.org>>
>
>     Hi,
>
>     make sure that your Ext JS build contains Ext.form.Label, or use a
>     full
>     build. The build that most of the GeoExt exmaples use
>     (http://extjs.cachefly.net/builds/ext-cdn-771.js) does not contain it.
>     Look e.g. at
>     http://dev.geoext.org/trunk/geoext/examples/legendpanel.html, it
>     uses a
>     full build.
>
>     Regards,
>     Andreas.
>
>     On 2010-01-06 16:24, stela anders wrote:
>     > Thanks Andreas !!!!
>     > I changed to WMS with success...
>     > But now I got that error when trying to generate the legend :
>     >
>     > Error: Ext.form.Label is not a constructor
>     > Arquivo-fonte:
>     >
>     http://localhost/Openlayer/Arquivos/geoextx/lib/GeoExt/widgets/LegendPanel.js
>     > Linha: 293
>     >
>     > Am I suppossed to change anything?
>     >
>     > Thanks
>     >
>     > Stella
>     >
>     > 2010/1/5 Andreas Hocevar <ahocevar at opengeo.org
>     <mailto:ahocevar at opengeo.org>
>     > <mailto:ahocevar at opengeo.org <mailto:ahocevar at opengeo.org>>>
>     >
>     >     Hi,
>     >
>     >     On 2010-01-04 19:36, stela anders wrote:
>     >     > Is it possible?
>     >
>     >     You have at least two choices:
>     >
>     >     (1) Use Layer.WMS instead of Layer.MapServer. With minor
>     modifications
>     >     to your mapfile, it is easy to use MapServer as WMS (see
>     >     http://mapserver.org/ogc/wms_server.html). I think this is
>     the best
>     >     option, because it will build the legend automatically from
>     >     GetLegendGraphic requests.
>     >
>     >     (2) Use a LayerStore with a legendURL field. For each layer, you
>     >     have to
>     >     provide a URL that points to a legend image. This option may
>     only work
>     >     with the current trunk version of GeoExt, not with v0.6.
>     >
>     >     Regards,
>     >     Andreas.
>     >
>     >     >
>     >     > I tried to create that :
>     >     >   var legendPanel = new GeoExt.LegendPanel({
>     >     >             title: 'Legend',
>     >     >             dynamic: true
>     >     >      });
>     >     >
>     >     > And added to Viewport, but nothing is created...
>     >     >
>     >     > Help me please!
>     >     >
>     >     >
>     >     >
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>     >     >
>     >
>     >
>     >     --
>     >     Andreas Hocevar
>     >     OpenGeo - http://opengeo.org/
>     >     Expert service straight from the developers.
>     >
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>
>     --
>     Andreas Hocevar
>     OpenGeo - http://opengeo.org/
>     Expert service straight from the developers.
>
>


-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.