Changed how the selection list works. CategoryDatasets can be dragged down to

the selection list, and will then be converted to Selections.

workflows/test_workflow.py

@@ -2,7 +2,7 @@ import gtk
 from system import dataset, logger, plots, workflow
 #import geneontology
 #import gostat
-from scipy import array,randn,log
+from scipy import array, randn, log, ones
 import cPickle
 import networkx
 
@@ -43,6 +43,7 @@ class TestWorkflow (workflow.Workflow):
         save.add_function(DatasetSaveFunction())
         self.add_stage(save)
         
+        
 class LoadAnnotationsFunction(workflow.Function):
 
     def __init__(self):
@@ -112,9 +113,10 @@ class TestDataFunction(workflow.Function):
                 graph.add_edge(x, y, 3)
         ds = dataset.GraphDataset(array(networkx.adj_matrix(graph)))
         ds_plot = plots.NetworkPlot(ds)
-            
+
+        cds = dataset.CategoryDataset(ones([3, 3]))
         ds_scatter = plots.ScatterMarkerPlot(ds, ds, 'rows_0', 'rows_0', '0_1', '0_2')
-        return [X, ds, p, ds_plot, ds_scatter,p2]
+        return [X, ds, p, ds_plot, ds_scatter, p2, cds]
 
 class SelectFunction(workflow.Function):
     def __init__(self):