private bool TryGetChildProp(StoreNodeBag objectNode, IPropBagInternal propBag, string propertyName, out StoreNodeProp child)
{
PropIdType propId = ((PSAccessServiceInternalInterface)propBag.ItsStoreAccessor).Level2KeyManager.FromRaw(propertyName);
bool result = objectNode.TryGetChild(propId, out child);
return(result);
}
private bool AddOrUpdateListener(IPropBagInternal propBag, ExKeyT compKey, string pathComp, SourceKindEnum sourceKind, OSCollection <T> pathListeners, int nPtr)
{
bool result;
if (pathListeners.Count > nPtr)
{
ObservableSource <T> listener = pathListeners[nPtr];
if (compKey != listener.CompKey || sourceKind != listener.SourceKind)
{
listener.Dispose();
ObservableSource <T> newListener = CreateAndListen(propBag, compKey, pathComp, sourceKind);
pathListeners[nPtr] = newListener;
result = true;
}
else
{
result = false;
}
}
else
{
ObservableSource <T> newListener = CreateAndListen(propBag, compKey, pathComp, sourceKind);
pathListeners.Add(newListener);
result = true;
}
return(result);
}
private bool TryGetPropBag(StoreNodeBag objectNode, out IPropBagInternal propBag)
{
// Unwrap the weak reference held by the objectNode in it's PropBagProxy.PropBagRef.
//bool result = objectNode.PropBagProxy.PropBagRef.TryGetTarget(out propBag);
bool result = objectNode.TryGetPropBag(out propBag);
return(result);
}
private ObservableSource <T> CreateAndListen(IPropBagInternal propBag, ExKeyT compKey, string pathComp, SourceKindEnum sourceKind)
{
ObservableSource <T> result;
if (sourceKind == SourceKindEnum.Down)
{
result = new ObservableSource <T>((IPropBag)propBag, compKey, pathComp, sourceKind, BINDER_NAME);
result.PropertyChangedWithVals += PropertyChangedWithVals_Handler;
}
else if (sourceKind == SourceKindEnum.TerminalNode)
{
result = new ObservableSource <T>((IPropBag)propBag, compKey, pathComp, BINDER_NAME);
result.PropertyChangedWithTVals += PropertyChangedWithTVals_Handler;
}
else
{
throw new InvalidOperationException($"CreateAndListen when supplied a propBag can only process nodes of source kind = {nameof(SourceKindEnum.Down)} and {nameof(SourceKindEnum.TerminalNode)}.");
}
return(result);
}
public PropBagProxy(IPropBagInternal propBag)
{
PropBagRef = new WeakReference <IPropBagInternal>(propBag ?? throw new ArgumentNullException(nameof(propBag)));
}
// TODO: should be able to have IPropStoreAccessServiceInternal provide all of this with a single call.
private PropNameType GetPropertyName(PSAccessServiceInterface propStoreAccessService, IPropBagInternal propBag, PropIdType propId, out PropStorageStrategyEnum storageStrategy)
{
PropNameType result;
if (propStoreAccessService.TryGetPropName(propId, out PropNameType propertyName))
{
result = propertyName;
}
else
{
throw new InvalidOperationException("Cannot retrieve the Target's property name from the TargetPropId.");
}
if (propStoreAccessService.TryGetValue((IPropBag)propBag, propId, out IPropData genProp))
{
storageStrategy = genProp.TypedProp.StorageStrategy;
}
else
{
throw new InvalidOperationException("Cannot retrieve the Target's property name from the TargetPropId.");
}
return(result);
}
