public SubscriptionToken SubscribePropertyChanged(
IPropertyChangedPubSubViewModel source,
string propertyName,
bool keepSubscriberReferenceAlive)
{
return(SubscribePropertyChanged(source, propertyName, propertyName, keepSubscriberReferenceAlive));
}
public SubscriptionToken SubscribePropertyChanged(
IPropertyChangedPubSubViewModel source,
string sourcePropertyName,
string targetPropertyName)
{
return(SubscribePropertyChanged(source, sourcePropertyName, targetPropertyName, ThreadOption.PublisherThread));
}
public SubscriptionToken SubscribePropertyChanged(
IPropertyChangedPubSubViewModel source,
string propertyName,
ThreadOption threadOption)
{
return(SubscribePropertyChanged(source, propertyName, propertyName, threadOption));
}
public SubscriptionToken SubscribePropertyChanged(
IPropertyChangedPubSubViewModel source,
string sourcePropertyName,
string targetPropertyName,
bool keepSubscriberReferenceAlive)
{
return(SubscribePropertyChanged(source, sourcePropertyName, targetPropertyName, ThreadOption.PublisherThread, keepSubscriberReferenceAlive));
}
public SubscriptionToken SubscribePropertyChanged(
IPropertyChangedPubSubViewModel source,
string sourcePropertyName,
string targetPropertyName,
ThreadOption threadOption,
bool keepSubscriberReferenceAlive)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (string.IsNullOrWhiteSpace(sourcePropertyName))
{
throw new ArgumentNullException(nameof(sourcePropertyName));
}
if (!source.ContainsReadableProperty(sourcePropertyName))
{
throw new InvalidOperationException($"{sourcePropertyName} is not a public, readable instance property on {source.GetType().FullName} (instance ID: {source.InstanceId})");
}
if (string.IsNullOrWhiteSpace(targetPropertyName))
{
throw new ArgumentNullException(nameof(targetPropertyName));
}
if (!ContainsReadableProperty(targetPropertyName))
{
throw new InvalidOperationException($"{targetPropertyName} is not a public, readable instance property on {GetType().FullName} (instance ID: {InstanceId})");
}
Dictionary <string, HashSet <string> > sourceSubscribedProperties = m_SourceSubscribedPropertyNames.GetOrCreateValue(source);
if (!sourceSubscribedProperties.TryGetValue(sourcePropertyName, out HashSet <string> subscribedPropertyTargets))
{
subscribedPropertyTargets = new HashSet <string>();
sourceSubscribedProperties.Add(sourcePropertyName, subscribedPropertyTargets);
}
if (subscribedPropertyTargets.Contains(targetPropertyName))
{
throw new InvalidOperationException($"{GetType().FullName} (instance ID: {InstanceId}) {targetPropertyName} property is already subscribed to {source.GetType().FullName} (instance {source.InstanceId}) {sourcePropertyName} property");
}
// Need to create the delegates this way in order for the event aggregator to retain the weak reference.
var action = (Action <PropertyChangedPubSubPayload>)GetType()
.GetRuntimeMethods()
.First(x => string.CompareOrdinal(x.Name, nameof(SubscriptionAction)) == 0)
.CreateDelegate(typeof(Action <PropertyChangedPubSubPayload>), this);
var filter = (Predicate <PropertyChangedPubSubPayload>)GetType()
.GetRuntimeMethods()
.First(x => string.CompareOrdinal(x.Name, nameof(SubscriptionFilter)) == 0)
.CreateDelegate(typeof(Predicate <PropertyChangedPubSubPayload>), this);
subscribedPropertyTargets.Add(targetPropertyName);
return(m_EventService.GetEvent <PubSubEvent <PropertyChangedPubSubPayload> >()
.Subscribe(action, threadOption, keepSubscriberReferenceAlive, filter));
}
