sort the gantts for stations according to entrance times

dream/plugins/CapacityStations/CapacityStationGantt.py

@@ -53,7 +53,17 @@ class CapacityStationGantt(plugin.OutputPreparationPlugin, TimeSupportMixin):
                   color='cyan',
                   entranceTime=entranceTime
               )
-          
+
+      # sort the tasks for an order according to the entrance time of the first component
+      for task_id, task in task_dict.iteritems():
+          if not task.get('entranceTime',None):
+              childrenTimes=[]
+              for t_id, t in task_dict.iteritems():
+                  if t.get('parent',None)==task_id and not (t.get('entranceTime',None)==None):
+                      childrenTimes.append(t['entranceTime'])
+              if childrenTimes:
+                  task['entranceTime']=min(childrenTimes)      
+
       # return the result to the gadget
       result[self.configuration_dict['output_id']] = dict(
         time_unit=self.getTimeUnitText(),