/// <summary>
/// Sets the level of the given event to the given level, also applying changes necessary to other events
/// that might have an overlap in participants.
/// </summary>
public void SetLevel(EventStub evnt, int level, bool cascade = false)
{
int oldLevel = GetLevelForEvent(evnt);
//if level does not change, don't need to do anyrhing
if (oldLevel == level)
{
return;
}
//if we add it to a higher level, must adapt predecessors and make sure any event in the
//same level with overlapping participants is recursively set to a higher level
if (oldLevel > level)
{
for (int i = level; i <= oldLevel; i++)
{
foreach (EventStub other in GetEventsInLevel(i))
{
evnt.RemovePredecessor(other);
if (i == level + 1 && other != evnt)
{
other.AddPredecessor(evnt);
}
}
}
foreach(EventStub other in GetEventsInLevel(level - 1))
{
evnt.AddPredecessor(other);
}
levelsForEvents[evnt] = level;
foreach (EventStub other in new List<EventStub>(
GetEventsInLevel(level).Except(new EventStub[] { evnt })))
{
if (other.ParticipantsOverlap(evnt))
{
SetLevel(other, level + 1);
}
}
}
//if we add it to a lower level, must essentially do the same as wehn adding to a higher level but
//adapting the predecessors is different
if (oldLevel < level)
{
for (int i = oldLevel; i < level; i++)
{
foreach (EventStub other in GetEventsInLevel(i))
{
other.RemovePredecessor(evnt);
if (i == level - 1 && other != evnt)
{
evnt.AddPredecessor(other);
}
}
}
levelsForEvents[evnt] = level;
foreach (EventStub other in new List<EventStub>(
GetEventsInLevel(level).Except(new EventStub[] { evnt })))
{
if (other.ParticipantsOverlap(evnt) || (other.Predecessors.Contains(evnt) && cascade))
{
SetLevel(other, level + 1, true);
}
else
{
other.RemovePredecessor(evnt);
}
}
}
//Clean up any level that may be empty.
CleanupEmptyLevels(1);
//Calculate the level for any object in the event, as it might change
foreach (SmartObject obj in evnt.InvolvedObjects)
{
CalculateLevel(obj);
}
}