code: def maximum( self ):
          
          if ( self._maximum is not None ):
              return self._maximum
          
          rtype = self.rulerType()
          
          if ( rtype == XChartRuler.Type.Number ):
              self._maximum = 100
              
          elif ( rtype == XChartRuler.Type.Date ):
              self._maximum = QDate.currentDate().addDays(10)
          
          elif ( rtype == XChartRuler.Type.Datetime ):
              self._maximum = QDateTime.currentDateTime().addDays(10)
          
          elif ( rtype == XChartRuler.Type.Time ):
              self._maximum = QDateTime.currentDateTime().time().addSecs(60 * 60)
              
          else:
              notches = self.notches()
              if ( notches ):
                  self._maximum = notches[-1]
                  
          return self._maximum
docs: Returns the maximum value for this ruler.  If the cached value is None,
          then a default value will be specified based on the ruler type.
          
          :return     <variant>