--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/client/ui/map/WMSLayersTree.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,122 @@
+package org.dive4elements.river.client.client.ui.map;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.google.gwt.core.client.GWT;
+
+import com.smartgwt.client.types.TreeModelType;
+import com.smartgwt.client.widgets.tree.Tree;
+import com.smartgwt.client.widgets.tree.TreeGrid;
+import com.smartgwt.client.widgets.tree.TreeNode;
+
+import org.dive4elements.river.client.shared.model.Capabilities;
+import org.dive4elements.river.client.shared.model.WMSLayer;
+
+
+public class WMSLayersTree extends TreeGrid {
+
+    /**
+     * An internal TreeNode that stores besides some string attribute a WMSLayer
+     * object.
+     */
+    public static class WMSLayerNode extends TreeNode {
+
+        protected WMSLayer wms;
+
+        public WMSLayerNode(WMSLayer wms) {
+            super();
+            this.wms = wms;
+
+            setAttribute("name", wms.getName());
+            setAttribute("title", wms.getTitle());
+        }
+
+        public WMSLayer getWMSLayer() {
+            return wms;
+        }
+    } // end of class WMSLayerNode
+
+
+    protected Capabilities capabilites;
+    protected String       srs;
+
+
+    public WMSLayersTree(Capabilities capabilites) {
+        super();
+        this.capabilites = capabilites;
+
+        initTree();
+    }
+
+
+    public WMSLayersTree(Capabilities capabilites, String srs) {
+        super();
+
+        this.capabilites = capabilites;
+        this.srs         = srs;
+
+        initTree();
+    }
+
+
+    protected void initTree() {
+        setLoadDataOnDemand(false);
+        setWidth100();
+        setHeight100();
+        setShowRoot(false);
+        setShowConnectors(true);
+        setNodeIcon("[SKIN]/images/blank.gif");
+
+        Tree tree = new Tree();
+        tree.setChildrenProperty("children-nodes");
+        tree.setNameProperty("title");
+        tree.setIdField("title");
+        tree.setModelType(TreeModelType.CHILDREN);
+        tree.setShowRoot(false);
+
+        TreeNode     root = new TreeNode("Root");
+        TreeNode[] layers = buildTree(capabilites.getLayers());
+
+        root.setAttribute("children-nodes", layers);
+        tree.setRoot(root);
+
+        setData(tree);
+
+        if (layers != null && layers.length == 1) {
+            tree.openFolder(layers[0]);
+        }
+    }
+
+
+    protected TreeNode[] buildTree(List<WMSLayer> layers) {
+        List<TreeNode> layerNodes = new ArrayList<TreeNode>();
+
+        for (WMSLayer layer: layers) {
+            WMSLayerNode tn = buildTreeNode(layer);
+
+            if (tn != null) {
+                TreeNode[] tns  = buildTree(layer.getLayers());
+
+                if (tns != null && tns.length > 0) {
+                    tn.setAttribute("children-nodes", tns);
+                }
+
+                layerNodes.add(tn);
+            }
+        }
+
+        return layerNodes.toArray(new TreeNode[layerNodes.size()]);
+    }
+
+
+    protected WMSLayerNode buildTreeNode(WMSLayer wms) {
+        if (srs != null && srs.length() > 0) {
+            return wms.supportsSrs(srs) ? new WMSLayerNode(wms) : null;
+        }
+        else {
+            GWT.log("No target SRS specified.");
+            return new WMSLayerNode(wms);
+        }
+    }
+}