Prevent to show blocs when the planning box should not have any blocs showed.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@14503 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/PlanningBox.py

@@ -928,7 +928,6 @@ class PlanningBoxWidget(Widget.Widget):
     external PageTemplate (or DTML depending) to render the CSS code
     relative to the structure that need to be rendered
     """
-
     here = REQUEST['here']
     # build structure
     # render_structure will call all method necessary to build the entire
@@ -936,7 +935,6 @@ class PlanningBoxWidget(Widget.Widget):
     # creates and fill up self.basic, self.planning and self.build_error_list
     self.render_structure(field=field, key=key, value=value,
                                     REQUEST=REQUEST, here=here)
-
     # getting CSS script generator
     planning_css_method = getattr(REQUEST['here'],'planning_css')
     # recover CSS data buy calling DTML document
@@ -975,7 +973,6 @@ class PlanningBoxWidget(Widget.Widget):
         """
     # XXX testing : uncoment to put selection to null => used for debugging
     #here.portal_selections.setSelectionFor(selection_name, None)
-
     ####### DATA DEFINITION #######
     self.build_error_list = None
     # recovering usefull planning properties
@@ -1713,7 +1710,7 @@ class BasicStructure:
                                 secondary_axis_stop  = group_stop,
                                 property_dict = property_dict)
 
-        if object_list != None:
+        if object_list not in [None, []]:
           child_group.setBasicActivities(object_list,self.list_error,
                                          secondary_axis_bounds)
 
@@ -2491,7 +2488,6 @@ class Activity:
         # passive
         block_color = '#D1E8FF'
         block_link = ''
-
       new_block = Bloc(name= block_name,color=block_color,link=block_link,
                        number = block_number,
                        calendar_view=self.calendar_view, parent_activity=self,