/// <summary>
/// Creates a new BagNode for the specified PropBag, optionally using a collection of PropNodes as the source.
/// The source PropNodes are cloned. If the value of a PropNode cannot be cloned, an InvalidOperation exception will be thrown.
/// This is the core of IPropBag.Clone()
/// </summary>
/// <param name="objectId">The new globally unique Id to use for this new BagNode.</param>
/// <param name="propBag">The client IPropBag.</param>
/// <param name="template">A Collection of PropNodes to use as a template for the new PropBag's Child PropItems. Can be null.</param>
/// <param name="maxPropsPerObject">The maximum number of PropItems a single PropBag can have.</param>
/// <param name="callPSParentNodeChangedEventSubsCache">A reference to a service that caches Parent Node Change Event dispatchers.</param>
public BagNode(ObjectIdType objectId, IPropBag propBag, PropNodeCollectionIntInterface template, int maxPropsPerObject, ICacheDelegates <CallPSParentNodeChangedEventSubDelegate> callPSParentNodeChangedEventSubsCache)
{
CompKey = new SimpleExKey(objectId, 0);
PropBagProxy = new WeakRefKey <IPropBag>(propBag ?? throw new ArgumentNullException(nameof(propBag)));
_callPSParentNodeChangedEventSubsCache = callPSParentNodeChangedEventSubsCache ?? throw new ArgumentNullException(nameof(callPSParentNodeChangedEventSubsCache));
_parentNCSubscriberCollection = null;
if (template == null)
{
_propNodeCollection = new PropNodeCollection(maxPropsPerObject);
}
else
{
_propNodeCollection = ClonePropNodes(template, this);
//var x = EqualityComparer<WeakRefKey<PropModelType>?>.Default;
//bool propItemSetIdsMatch = x.Equals(_propNodeCollection.PropItemSetId, template.PropItemSetId);
//System.Diagnostics.Debug.Assert(EqualityComparer<WeakRefKey<PropModelType>?>.Default.Equals(_propNodeCollection.PropItemSetId, template.PropItemSetId), "PropItemSetIds don't match.");
bool propItemSetIdsMatch = _propNodeCollection.PropItemSetKey == template.PropItemSetKey;
System.Diagnostics.Debug.Assert(propItemSetIdsMatch, "PropItemSetIds don't match.");
System.Diagnostics.Debug.Assert(_propNodeCollection.IsFixed == template.IsFixed, "IsFixed doesn't match.");
}
}
public IDisposable SubscribeToParentNodeHasChanged(EventHandler <PSNodeParentChangedEventArgs> handler)
{
ParentNCSubscriptionRequest subRequest = new ParentNCSubscriptionRequest(CompKey, handler);
lock (_sync)
{
ParentNCSubscription sub = ParentNCSubscriberCollection.GetOrAdd(subRequest, _callPSParentNodeChangedEventSubsCache);
}
UnsubscriberForPropStore unsubscriber = new UnsubscriberForPropStore(new WeakReference <BagNode>(this), subRequest);
return(unsubscriber);
}
public bool UnsubscribeToParentNodeHasChanged(ParentNCSubscriptionRequest subRequest)
{
lock (_sync)
{
if (ParentNCSubscriberCollection.TryRemoveSubscription(subRequest))
{
return(true);
}
else
{
return(false);
}
}
}
