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:
            if self.fieldListener is not None:
                ctx.removeFieldListener(self.fieldListener)
            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