[OpenLayers-Users] mergeNewParams + Legend

[Sascha Müller]

Hi,

Do I understand it right, for every layer (WMS) I create, I have to  
give the WMS layer a StyleMap with a "default" render intent? Because I 
use a VectorLegend?
I have in my App, depending on the customer, a different number of 
layers. This sounds like a lot of work for me.
Or I have to create a VectorLegend specially for the layer with the 
large SLD?

 >> This will tell VectorLegend that it supports all layers that have a 
styleMap. >> Does it mean, that the Legend accept ONLY layer that have a 
styleMap or accept ALSO layer that have a styleMap?

Another approaches:
- If I change from SLD_BODY to SLD (with the URL of the SLD) in 
mergeNewParams(), prevents this a too long URI?
- Is there a way to use 'POST' with GetLegendGraphic?

regards,

Sascha


> Hi,
>
> I am pretty sure that the request URI is too long. What you could do is reconfigure the legend type selection sequence, so a VectorLegend rather than a WMSLegend is created. A prerequisite is this non-API hack though:
>
> GeoExt.VectorLegend.supports = function(layerRecord) {
>      return layerRecord.get("layer").styleMap;
> };
>
> This will tell VectorLegend that it supports all layers that have a styleMap.
>
> Now you can go ahead and create your legendPanel like this:
>
> var legendPanel = new GeoExt.LegendPanel({
>      preferredTypes: ["gx_vectorlegend"]
> });
>
> Finally, when creating your WMS layer with the SLD_BODY (and before you do mergeNewParams), you have to give the WMS layer a StyleMap with a "default" render intent, which you have to give the style object of your SLD.
>
> Regards,
> Andreas.
>
> On Aug 5, 2010, at 17:45 , Sascha Müller wrote:
>
>    
>>
>> Hi,
>>
>> I tried this SLD with only two instead of five rules. It works.
>> Could it be, that the request 'GetLegendGraphic' is too long with the
>> SLD inside?
>> Like mergeNewParams() without 'Post'  in 'OpenLayers.Layer.WMS'.
>>
>> Is there a way to implement it?
>> Or is this more a GeoServer thing?
>>
>> Sascha
>>
>>
>>      
>>> Hi,
>>>
>>> I use:
>>>
>>> GeoExt: trunk (Revision: 2257)
>>> OpenLayers: 2.9
>>> GeoExt: 3.2.1
>>> GeoServer: 1.7.7
>>>
>>>
>>> I use mergeNewParams() to change the Style of a layer. This approach
>>> works except for one layer.
>>> This layer contains five rules with filter. The map changes after
>>> mergeNewParams(), the legend not.
>>> The layername is still there, the images of the five rules are gone.
>>>
>>> If I use this SLD (see below) for the layer with the GeoServer from
>>> start, the layer appears in map and legend. only after
>>> mergenewParams() the layer appears not in the legend.
>>>
>>> The layer uses this:  var addlayer = new OpenLayers.Layer.WMS.Post()
>>>
>>> SLD
>>> ===
>>> <?xml version="1.0" encoding="UTF-8"?>
>>> <sld:StyledLayerDescriptor xmlns="http://www.opengis.net/sld"
>>> xmlns:sld="http://www.opengis.net/sld"
>>> xmlns:ogc="http://www.opengis.net/ogc"
>>> xmlns:gml="http://www.opengis.net/gml" version="1.0.0">
>>> <sld:NamedLayer>
>>> <Name>WL:UBahn</Name>
>>> <sld:UserStyle>
>>> <sld:Name>Default Styler</sld:Name>
>>> <sld:Title/>
>>> <sld:FeatureTypeStyle>
>>> <sld:Name>name</sld:Name>
>>> <sld:FeatureTypeName>Feature</sld:FeatureTypeName>
>>> <sld:SemanticTypeIdentifier>generic:geometry</sld:SemanticTypeIdentifier>
>>> <sld:SemanticTypeIdentifier>colorbrewer:unique:oranges</sld:SemanticTypeIdentifier>
>>> <sld:Rule>
>>> <sld:MinScaleDenominator>0</sld:MinScaleDenominator>
>>> <sld:MaxScaleDenominator>100000000</sld:MaxScaleDenominator>
>>> <sld:Name>rule01</sld:Name>
>>> <sld:Title>U1</sld:Title>
>>> <Filter>
>>> <PropertyIsEqualTo>
>>> <PropertyName>LINIE</PropertyName>
>>> <Literal>U1</Literal>
>>> </PropertyIsEqualTo>
>>> </Filter>
>>> <sld:LineSymbolizer>
>>> <sld:Stroke>
>>> <sld:CssParameter name="stroke">
>>> <Literal>#FEEDDE</Literal>
>>> </sld:CssParameter>
>>> <sld:CssParameter name="stroke-linecap">
>>> <Literal>butt</Literal>
>>> </sld:CssParameter>
>>> <sld:CssParameter name="stroke-linejoin">
>>> <Literal>miter</Literal>
>>> </sld:CssParameter>
>>> <sld:CssParameter name="stroke-opacity">1</sld:CssParameter>
>>> <sld:CssParameter name="stroke-width">3</sld:CssParameter>
>>> <sld:CssParameter name="stroke-dashoffset">
>>> <Literal>0</Literal>
>>> </sld:CssParameter>
>>> </sld:Stroke>
>>> </sld:LineSymbolizer>
>>> </sld:Rule>
>>>
>>> <!-- The other RULSs looks the same like the one above -->
>>>
>>> </sld:FeatureTypeStyle>
>>> </sld:UserStyle>
>>> </sld:NamedLayer>
>>> </sld:StyledLayerDescriptor>
>>>
>>> Is there something wrong with the SLD? Do I have something to consider
>>> if I use mergeNewParams(), or something with the Legend?
>>>
>>> Thanks
>>>
>>> Sascha
>>>
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at openlayers.org
>>> http://openlayers.org/mailman/listinfo/users
>>>
>>>
>>>
>>>        
>>
>> _______________________________________________
>> Users mailing list
>> Users at openlayers.org
>> http://openlayers.org/mailman/listinfo/users
>>      
>
>
>