[Users] Layer group with legend

[Alexandre Dube]

Andreas,

   Thanks again for your support.

On 10-10-19 09:41 AM, Andreas Hocevar wrote:
> You are calling the wrong superclass. You need
> GeoExt.tree.LayerParamLoader.prototype.createNode.call(this, attr);
>    

Got it.  Now it's working but with one remaining issue : the WMSLegend 
is the same for all nodes.  If I have the 4 paramNodes checked, I get 4 
icons under each one instead of the specific one per layer (and it 
figures, because that's what it's configured to do).  You can see for 
yourself by replacing the mapPanel and tree in the tree-legend example 
with these [1].

So, I need to configure the WMSLegend to use a single param layer value 
(haven't checked, but I don't know if that's possible).

>> 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 ?
>>      
> You could use a LayerLoader with a filter for each of your groups. At least that's what I hear other people do.
>    

Do you have any example to share ?

Thanks,

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"
                 },
                 uiProviders: {
                     "custom_ui": LayerNodeUI
                 },
                 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.LayerParamLoader.prototype.createNode.call(this, attr);
                     }
             }
         },
         rootVisible: true,
         lines: false
     });

-- 
Alexandre Dubé
Mapgears
www.mapgears.com