[Users] Layer Tree groups

[antoniofacno]

On 08/11/10 19:08, Matt Priour wrote:
> While the JSON editing function in 
> http://api.geoext.org/1.0/examples/tree.js allows people to play with 
> the example directly, it has also generated quite a bit of confusion.
> First, there is no need to write your child node configurations to 
> JSON and then parse it back out of JSON.
> Second, do you actually want to show the layers from the WMS that make 
> up your labores_2010  WMS Layer and give users the ability to turn 
> them on/off independtly?
> If so, then you want to use a LayerParamLoader, if not then you want 
> to use the regular OverlayLayerContainerLoader or a gx_layer node with 
> no loader.
>
> Here is the code you would use for allowing individual selection of 
> the different labores_2010  layers
> {
>   nodeType: "gx_layer",
>   text: "Labores 2010",
>   layer: "labores_2010",
>   isLeaf:false
>   loader: {
>      param: "LAYERS"
>   }
> // creates subnodes for the layers in the LAYERS param. If we assign
> // a loader to a LayerNode and do not provide a loader class, a
> // LayerParamLoader will be assumed.
> }
>
> Here is the code you would use for a single node to turn on/off the 
> labores_2010 layer
> {
>   nodeType: "gx_layer",
>   text: "Labores 2010",
>   layer: "labores_2010",
>   isLeaf: true,
>   checked: true
> }
>
> Here is the code to use an OverlayLayerContainerLoader. This will 
> create subnodes for each non-baseLayer that has 
> 'displayInLayerSwitcher' == true (the default for the layer, unless 
> you specifically set it false in the layer options). It will use each 
> layer's name attribute as the text for the tree node.
> {
>   nodeType:'gx_overlaylayercontainer',
>   expanded:true,
>   loader:{
>      baseAttrs:{checked:true} //this gives the overlayer layers 
> checkboxes
>   }
> }
>
> Get rid of the OpenLayers.Format.JSON write & parse stuff and just use 
> treeConfig object directly.
>
I think that I understand the JSON stuff, but the treeConfig object not 
at all. Is that what I have to wrote?

         var treeConfig = [
         {
             layer: "catastro",
             nodeType: "gx_baselayercontainer",
         },
         {
             nodeType: "gx_layer",
             text: "Labores 2010",
             layer: "labores_2010",
             isLeaf:false
             loader: {
               param: "LAYERS"
             }
         } ];

I looking info for treeConfig Object but I don't find anything :(

A lot of thanks,