[Users] Layer group with legend

[Alexandre Dube]

One thing at a time.  First, mixing the tree-legend and 
LayerParamLoader.  I don't really get how I'm suppose to assemble the 
elements.  So far, I modified the tree-legend example and tried [1] but 
it triggers a javascript error...

Secondly, I about my other "group" node level thing, I'm not sure if 
that's currently possible with the current elements unless I create the 
nodes manually, am I right ?

Thanks for any pointer,

Alexandre


[1] ==================================

     var mapPanel = new GeoExt.MapPanel({
         region: "center",
         center: [146.1569825, -41.6109735],
         zoom: 6,
         layers: [
             new OpenLayers.Layer.WMS("Tasmania",
                 "http://demo.opengeo.org/geoserver/wms", {
                     layers: 
"topp:tasmania_state_boundaries,topp:tasmania_water_bodies,topp:tasmania_roads,topp:tasmania_cities"
                 }, {
                     buffer: 0,
                     isBaseLayer: false
                })
         ]
     });

     var tree = new Ext.tree.TreePanel({
         region: "east",
         title: "Layers",
         width: 250,
         autoScroll: true,
         enableDD: true,
         // apply the tree node component plugin to layer nodes
         plugins: [{
             ptype: "gx_treenodecomponent"
         }],
         loader: {
             applyLoader: false,
             uiProviders: {
                 "custom_ui": LayerNodeUI
             }
         },
         root: {
             nodeType: "gx_layer",
             layer: "Tasmania",
             isLeaf: false,
             loader: {
                 param: "LAYERS",
                 baseAttrs: {
                     uiProvider: "custom_ui"
                 },
                 createNode: function(attr) {
                     // add a WMS legend to each node created
                     attr.component = {
                         xtype: "gx_wmslegend",
                         layerRecord: 
mapPanel.layers.getByLayer(attr.layer),
                         showTitle: false,
                         // custom class for css positioning
                         // see tree-legend.html
                         cls: "legend"
                     }
                     return 
GeoExt.tree.LayerLoader.prototype.createNode.call(this, attr);
                     }
             }
         },
         rootVisible: true,
         lines: false
     });




On 10-10-19 08:15 AM, Alexandre Dube wrote:
> Hi Andreas,
>
>     Thanks for your reply.  I little more detail wouldn't hurt if it's
> not asking for too much.
>
>     Also, I'd like to add one thing in my tree : groups.  I already have
> the name of the group each server-side layer has and I'd like to add a
> level of nodes for that :
>
>     [x] Group1
>       [x] Layer1
>         (img) Class1
>         (img) Class2
>        [x] Layer2
>          (img) Class1
>      [ ] Group2
>        [ ] Layer3
>        [ ] Layer4
>        [x] Layer5
>
> and so on using one single OpenLayers.Layer.WMS object.  Is that
> possible too ?
>
> Thanks,
>
> Alexandre
>
>
> On 10-10-18 04:53 PM, Andreas Hocevar wrote:
>    
>> Hi Alexandre,
>>
>> this is definitely possible. All you need to do is configure your LayerParamLoader with a custom createNode function that creates an appropriate LayerLegend instance. Pretty much the same as in the tree-legend.html example.
>>
>> Does this answer your question or do you need more details?
>>
>> Regards,
>> Andreas.
>>
>> On Oct 18, 2010, at 22:02 , Alexandre Dube wrote:
>>
>>
>>      
>>> Hi,
>>>
>>>     Is it possible to use a "group layer" as shown in this example [1]
>>> with each "param/layer" generated node having its own "legend" node [2]
>>> ?  I would like to have one OpenLayers.WMS object in the end.  Is that
>>> possible with the current GeoExt legend and tree features available ?
>>>
>>>     Thanks,
>>>
>>> [1] http://api.geoext.org/1.0/examples/tree.html
>>> [2] http://api.geoext.org/1.0/examples/tree-legend.html
>>>
>>> -- 
>>> Alexandre Dubé
>>> Mapgears
>>> www.mapgears.com
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at geoext.org
>>> http://www.geoext.org/cgi-bin/mailman/listinfo/users
>>>
>>>        
>>
>>
>>      
>
>    


-- 
Alexandre Dubé
Mapgears
www.mapgears.com