GUI "Display Statistics" works on single variable

Previous Display Statistics required that two variables be selected. Now if only one is selected, the same data as "glance inspectStats" will be shown.

pyglance/glance/gui_statsprovider.py

@@ -73,7 +73,17 @@ class GlanceGUIStats (object) :
         # get Data objects
         aDataObject = self.dataModel.getVariableData(A_CONST, aVarName)
         bDataObject = self.dataModel.getVariableData(B_CONST, bVarName)
+
+        if aDataObject is None and bDataObject is not None:
+            aDataObject, bDataObject = bDataObject, aDataObject
+
+        if aDataObject is not None and bDataObject is None:
+            return self.sendStatsInfoSingle(aVarName, aDataObject)
+
+        return self.sendStatsInfoPair(aVarName, bVarName, aDataObject, bDataObject)
+
         
+    def sendStatsInfoPair(self, aVarName, bVarName, aDataObject, bDataObject):
         # check the minimum validity of our data; this call can raise an IncompatableDataObjects exception
         dataobjects.DiffInfoObject.verifyDataCompatability(aDataObject, bDataObject, aVarName, bVarName)
         
@@ -97,6 +107,27 @@ class GlanceGUIStats (object) :
         # tell my listeners to show the stats data we've collected
         for listener in self.statsListeners :
                 listener.displayStatsData(aVarName, bVarName, renderedText)
+
+    def sendStatsInfoSingle(self, aVarName, aDataObject):
+        LOG.info ("Constructing statistics for one variable")
+
+        # do the statistical analysis and collect the data that will be needed to render it nicely
+        tempAnalysis = stats.StatisticalInspectionAnalysis.withDataObjects(aDataObject)
+        # TODO, these constants should be moved into the gui_constants
+        tempInfo = { 'variable_name': aVarName }
+        kwargs   = { 'runInfo':    tempInfo,
+                     'statGroups': tempAnalysis.dictionary_form() }
+
+        # use a mako template to render an html verion of the stats for display
+        templateLookup = TemplateLookup(directories=[resource_filename(__name__, ".")])
+        guiTemplate    = Template(resource_string(__name__, "guistatsreport.txt"), lookup=templateLookup)
+        renderedText = guiTemplate.render(**kwargs)
+
+        # tell my listeners to show the stats data we've collected
+        for listener in self.statsListeners :
+                listener.displayStatsData(aVarName, None, renderedText)
+
+
     
     def sendRawData (self, fileID) :
         """