[Users] Layer leaf nodes replicated across all tree nodes

[Luís de Sousa]

Dear all,

This is going on with GeoExt 1.1 and OpenLayers 2.12. I need to build a
layer tree dynamically, with layers and nodes that are only known at run
time. The snippets I show below correctly create a layer tree with several
nodes and adds the layers node leafs. The problem is that though each layer
is assigned to a single tree node, it is then shown under each and every
tree node created.

During init the tree and its root are set up:

  treeRoot = new Ext.tree.TreeNode
  ({
      text        : 'Project',
      id          : '0',
      leaf        :false,
      expandable  : true,
      expanded    : true
  });

  layerTree = new Ext.tree.TreePanel
  ({
    title: 'Map Layers',
    region: "west",
    width: 200,
    collapsible: true,
    autoScroll: true,
    enableDD: true,
    plugins:
    [{
      ptype: "gx_treenodecomponent"
    }],
    loader:
    {
      applyLoader: false,
      uiProviders:
      {
        "custom_ui": LayerNodeUI
      }
    },
    root: treeRoot,
    rootVisible: false,
    lines: false
  });

Later on new tree nodes can be added according to a tag, and kept in an
array:

    if(treeNodes[tag] == null)
    {
        treeNodes[tag] = new GeoExt.tree.OverlayLayerContainer
        ({
                text: tag,
                leaf: false,
                expanded: true
        });
        treeRoot.appendChild(treeNodes[tag]);
    }

Layers are added to the map and to a specific tree node:

    var layer = new OpenLayers.Layer.WMS(title, serviceURL, params,
options);
    leftMap.addLayer(layer);
    layer.events.register("visibilitychanged", this, toggleLayer);

    var newNode = new GeoExt.tree.LayerNode(
    {
        text: title,
        layer: layerName,
        leaf: true,
        checked: false,
        children: [],
        nodeType: "gx_layer"
    });
    treeNodes[tag].appendChild(newNode);

But then each layer appears several times, once under each tree node.

Any hints on why it is happening this way are welcome. Thank you,

Luís
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.geoext.org/pipermail/users/attachments/20140206/31bbc1fb/attachment.htm