NotificationCounter.py

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#
# Copyright 2021, MeVis Medical Solutions AG
#
# The user may use this file in accordance with the license agreement provided with
# the Software or, alternatively, in accordance with the terms contained in a
# written agreement between the user and MeVis Medical Solutions AG.
#
# For further information use the contact form at https://www.mevislab.de/contact
#
 
class NotificationCounter:
  def __init__(self, ctx, fieldName):
    self.counter = 0
    self.validCounter = 0
    self.fieldListener = None
    
    self.setField(ctx, fieldName)
 
  def reset(self):
    self.counter = 0
    self.validCounter = 0
 
  def setField(self, ctx, fieldName):
    if not ctx.hasField(fieldName):
      ctx.log("Error: Field '" + fieldName + "' not found in parent network.")
    else:
      self.fieldListener = ctx.addFieldListener(ctx.field(fieldName), self.updateCounter, False)
 
  def updateCounter(self, field):
    self.counter += 1
    if callable(getattr(field, 'isValid', None)) and field.isValid():
      self.validCounter += 1
 
  def notifications(self):
    return self.counter
 
  def validNotifications(self):
    return self.validCounter