protected void SubscriptionAction(PropertyChangedPubSubPayload payload)
{
if (!payload.Source.TryGetTarget(out IPropertyChangedPubSubViewModel source))
{
return;
}
// Prevent an object reacting to its own notifications.
if (source.InstanceId == InstanceId)
{
return;
}
Dictionary <string, HashSet <string> > sourceSubscribedProperties = m_SourceSubscribedPropertyNames.GetOrCreateValue(source);
if (!sourceSubscribedProperties.TryGetValue(payload.PropertyName, out HashSet <string> subscribedPropertyTargets))
{
return;
}
foreach (string target in subscribedPropertyTargets)
{
RaisePropertyChanged(target);
}
}
protected bool SubscriptionFilter(PropertyChangedPubSubPayload payload)
{
if (payload is null)
{
throw new ArgumentNullException(nameof(payload));
}
if (!payload.Source.TryGetTarget(out IPropertyChangedPubSubViewModel source))
{
return(false);
}
// Prevent an object reacting to its own notifications.
if (source.InstanceId == InstanceId)
{
return(false);
}
Dictionary <string, HashSet <string> > sourceSubscribedProperties = m_SourceSubscribedPropertyNames.GetOrCreateValue(source);
// Only proceed if object is subscribed to source property name.
if (!sourceSubscribedProperties.TryGetValue(payload.PropertyName, out HashSet <string> subscribedPropertyTargets))
{
return(false);
}
return(true);
}
