Ok, I got it! But following this example, the mapPanel object has to be declared, before we can update the legendURL with: mapPanel.layers.getAt(x).set("legendURL", "..."). I've tried this, that's perfect.
But is there a trick to declare this legendURL at the same time than the OpenLayers.Layer.WMS? Otherwise, I should do some queries to find the good index in layers for each layer that needs legend. The problem is that it's not an OL attribute...
I tried something that works, but maybe there is a better solution: when needed, I add a legendURL attribute in OL.Layer.WMS configuration. Once all the OL layers and the GeoExt mapPanel are declared, a for loop creates the proper legendURL for GeoExt configuration:
var lyrNb = mapPanel.layers.getCount();
for (i=0; i<lyrNb; i++) {
var lyr = mapPanel.layers.getAt(i);
lyr.set("legendURL", lyr.data.layer.legendURL)
}
This way, WPS layers do have this legendURL parameter for GeoExt, and other regular WMS layers do not change.
Gabriel
----- Mail original -----
De: "Andreas Hocevar" <ahocevar@anonymised.com>
À: "Gabriel Vatin" <gabriel.vatin@anonymised.com>
Cc: "geoserver" <geoserver-users@lists.sourceforge.net>, "Xavier Chaze" <xavier.chaze@anonymised.com>
Envoyé: Jeudi 25 Avril 2013 16:36:47
Objet: Re: [Geoserver-users] WPS legend within GeoExt LegendPanel
The legend graphic comes from a WMS GetLegendGraphic request by
default. This won't work for your WPS layers. You will have to add a
legendURL field to the layer records of your WPS layers. See the
http://api.geoext.org/1.1/examples/legendpanel.html and investigate
the 'legendurl' button to see how this is done.
Andreas.
On Thu, Apr 25, 2013 at 2:15 PM, Gabriel Vatin
<gabriel.vatin@anonymised.com> wrote:
Hi all,
I am having some issues with using GeoExt, OpenLayers + GeoServer, when it comes to the legend and WPS.
Here are some WMS layers I tried to display on a map and within a GeoExt LegendPanel : "Cities" (points, works great), "CoastLine" (line, works great), "ZST Gibraltar" (polygon, works great), "Timezones" (polygon with GeoServer SLD for colors, works still great).
No, some layers that have a few problems :
"TSE Gibraltar" (2 GS layers that are integrated on server side, requested as one layer with OpenLayers) is displayed, but no legend. I think it's because it's agregation of layers, so no real SLD.
"Waves speed" (1 GS layer of points with WPS for interpolation, makes an "area" layer), here again the layer is displayed well, but no legend.
I tried basic GetLegendGraphic for these two layers, I do have good legend for WPS layer, but none of course for agregated layers.
All these layers are requested with OpenLayers as OpenLayers.Layer.WMS, with same configuration. GeoExt LegendPanel is configured so :
legendPanel = new GeoExt.LegendPanel({
defaults: {
labelCls: 'mylabel',
style: 'padding:5px'
},
bodyStyle: 'padding:5px',
width: 350,
autoScroll: true,
region: 'west'
});
Do you have any idea how to display the legend for WPS processed images?
Thanks for the help !
Regards,
Gabriel Vatin
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Andreas Hocevar
OpenGeo - http://opengeo.org/
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