The navigator now displays the plots and data in a tree that shows the ancestry information.

system/project.py

@@ -45,28 +45,42 @@ class Project:
     def get_selection(self):
         """Returns the current selection object"""
         return self.sel_obj.current_selection
-    
+ 
+    def get_data_iter(self, obj):
+        """Retuns an iterator to data."""
+        retval = [None]
+        def is_obj(m, p, i, d):
+            if obj == m.get_value(i, 2):
+                d.append(i)
+                return True
+
+        self.data_tree.foreach(is_obj, retval)
+        return retval[-1]
+
     def add_data(self, parent, data):
         """Adds a set of data and plots to the navigator.
 
         This method is usually called after a Function in a workflow
         has finished and returns its output."""
+        
+        parent_iter = self.get_data_iter(parent)
+
         for d in data:
             if isinstance(d, dataset.Dataset):
                 self.add_dataset(d)
-                self.data_tree_insert(None, d.get_name(), d)
+                self.data_tree_insert(parent_iter, d.get_name(), d)
             elif isinstance(d, plots.Plot):
 #                self.add_view(d)
-                self.data_tree_insert(None, 'view', d)
+                self.data_tree_insert(parent_iter, d.get_title(), d)
                 d.set_project(self)
                 self.attach(d, 'selection_update')
 
     def data_tree_insert(self, parent, text, data):
         tree = self.data_tree
-        iter = tree.append(parent)
-        tree.set_value(iter, 0, text)
-        tree.set_value(iter, 1, type(data))
-        tree.set_value(iter, 2, data)
+        it = tree.append(parent)
+        tree.set_value(it, 0, text)
+        tree.set_value(it, 1, type(data))
+        tree.set_value(it, 2, data)
 
     def add_dataset(self,dataset):
         """Appends a new Dataset to the project."""