private void DeleteInvalidTransitions(ObservableCollection <ObjectModel.ITransition> transitionList)
{
IEnumerable <ObjectModel.ITransition> invalidTransitions = transitionList.Where(t => t.TransitionType == ViewModel.Transition.TransitionTypes.Group && !t.IsValid).ToArray();
foreach (Transition groupTransition in invalidTransitions)
{
groupTransition.Remove();
MembershipChanged?.Invoke(this, new MembershipChangeArgument(MembershipChangeAction.RemoveTransition, groupTransition));
}
}
private void Members_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
if (e.NewItems.Count == 1 && e.NewItems[0] is ObjectModel.ITransitionEndpoint endpoint)
{
MonitorEndpoint(endpoint);
System.Threading.Interlocked.Increment(ref ValidationPendingCount);
ThreadHelper.Generic.BeginInvoke(new System.Action(() =>
{
if (System.Threading.Interlocked.Exchange(ref ValidationPendingCount, 0) > 0)
{
ValidateTransitions();
}
MembershipChanged?.Invoke(this, new MembershipChangeArgument(MembershipChangeAction.Add, endpoint));
}));
break;
}
else
{
throw new NotImplementedException();
}
case NotifyCollectionChangedAction.Remove:
if (e.OldItems.Count == 1 && e.OldItems[0] is ObjectModel.ITransitionEndpoint endpoint1)
{
UnmonitorEndpoint(endpoint1);
System.Threading.Interlocked.Increment(ref ValidationPendingCount);
ThreadHelper.Generic.BeginInvoke(new System.Action(() =>
{
if (System.Threading.Interlocked.Exchange(ref ValidationPendingCount, 0) > 0)
{
ValidateTransitions();
}
MembershipChanged?.Invoke(this, new MembershipChangeArgument(MembershipChangeAction.Remove, endpoint1));
}));
break;
}
else
{
throw new NotImplementedException();
}
default:
throw new NotImplementedException();
}
}
private void MemberPropertyChangedHandler(object sender, PropertyChangedEventArgs e)
{
switch (e.PropertyName)
{
case "GroupStatus":
if (sender is ObjectModel.ITransitionEndpoint endpoint)
{
ValidateTransitions();
MembershipChanged?.Invoke(this, new MembershipChangeArgument(MembershipChangeAction.Change, endpoint));
}
break;
default:
break;
}
}
private void MemberTransitionsCollectionChangedHandler(object sender, NotifyCollectionChangedEventArgs e)
{
System.Threading.Interlocked.Increment(ref ValidationPendingCount);
ThreadHelper.Generic.BeginInvoke(new System.Action(() =>
{
if (System.Threading.Interlocked.Exchange(ref ValidationPendingCount, 0) > 0)
{
ValidateTransitions();
}
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
if (e.NewItems.Count == 1 && e.NewItems[0] is ObjectModel.ITransition transition)
{
if (transition.DestinationState != null && transition.SourceState != null)
{
transition.PropertyChanged += TransitionPropertyChangedHandler;
MembershipChanged?.Invoke(this, new MembershipChangeArgument(MembershipChangeAction.AddTransition, transition));
}
break;
}
else
{
throw new NotImplementedException();
}
case NotifyCollectionChangedAction.Remove:
if (e.OldItems.Count == 1 && e.OldItems[0] is ObjectModel.ITransition transition1)
{
if (transition1.DestinationState != null && transition1.SourceState != null)
{
transition1.PropertyChanged -= TransitionPropertyChangedHandler;
MembershipChanged?.Invoke(this, new MembershipChangeArgument(MembershipChangeAction.RemoveTransition, transition1));
}
break;
}
else
{
throw new NotImplementedException();
}
default:
throw new NotImplementedException();
}
}));
}
private void AddTransitionsForEndpoint(ObjectModel.ITransitionEndpoint endpoint)
{
endpoint.TransitionsFrom.CollectionChanged += MemberTransitionsCollectionChangedHandler;
foreach (ObjectModel.ITransition transition in endpoint.TransitionsFrom)
{
if (transition.SourceState != null && transition.DestinationState != null)
{
ObjectModel.LayerPosition layerPosition = transition.DestinationState.LayerPositions.Where(lp => lp.Layer == Layer).FirstOrDefault();
if (Members.Contains(transition.SourceState) &&
this != transition.DestinationState &&
(layerPosition == null || layerPosition.GroupStatus != LayerPosition.GroupStatuses.Explicit))
{
Transition groupTransition = TransitionsFrom.FirstOrDefault(t => t.SourceState == this && t.DestinationState == transition.DestinationState && t.TriggerEvent == transition.TriggerEvent) as Transition;
if (groupTransition == null)
{
groupTransition = new Transition(Controller, this, transition.DestinationState, transition.TriggerEvent);
MembershipChanged?.Invoke(this, new MembershipChangeArgument(MembershipChangeAction.AddTransition, groupTransition));
}
groupTransition.IsValid = true;
}
}
}
endpoint.TransitionsTo.CollectionChanged += MemberTransitionsCollectionChangedHandler;
foreach (ObjectModel.ITransition transition in endpoint.TransitionsTo)
{
if (transition.SourceState != null && transition.DestinationState != null)
{
ObjectModel.LayerPosition layerPosition = transition.SourceState.LayerPositions.Where(lp => lp.Layer == Layer).FirstOrDefault();
if (Members.Contains(transition.DestinationState) &&
this != transition.SourceState &&
(layerPosition == null || layerPosition.GroupStatus != LayerPosition.GroupStatuses.Explicit))
{
Transition groupTransition = TransitionsTo.FirstOrDefault(t => t.SourceState == transition.SourceState && t.DestinationState == this && t.TriggerEvent == transition.TriggerEvent) as Transition;
if (groupTransition == null)
{
groupTransition = new Transition(Controller, transition.SourceState, this, transition.TriggerEvent);
MembershipChanged?.Invoke(this, new MembershipChangeArgument(MembershipChangeAction.AddTransition, groupTransition));
}
groupTransition.IsValid = true;
}
}
}
}
