private void ValidateTransitions()
{
using (new UndoRedo.DontLogBlock(Controller))
{
// First, mark all the transitions for potential removal
foreach (Transition groupTransition in TransitionsFrom.Where(t => t.TransitionType == Transition.TransitionTypes.Group))
{
groupTransition.IsValid = false;
}
foreach (Transition groupTransition in TransitionsTo.Where(t => t.TransitionType == Transition.TransitionTypes.Group))
{
groupTransition.IsValid = false;
}
// Now figure what transitions we actually need
if (Members != null)
{
foreach (ObjectModel.ITransitionEndpoint endpoint in Members.Where(m => m.LayerPositions.Any(lp => lp.Layer == Layer && lp.GroupStatus == LayerPosition.GroupStatuses.Explicit)))
{
AddTransitionsForEndpoint(endpoint);
}
}
// And finally, get rid of those not needed
DeleteInvalidTransitions(TransitionsFrom);
DeleteInvalidTransitions(TransitionsTo);
}
System.Threading.Interlocked.Exchange(ref ValidationPendingCount, 0);
}
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;
}
}
}
}