/// <summary>
/// Only support 1 level of undo
/// </summary>
internal void UndoPropagate()
{
if (IsActive)
{
Propagate(previousActiveOptItem);
// Allow only one level of undo and prevent a cycle of undo and redo.
previousActiveOptItem = activeOptItem;
}
}
internal void Propagate(OptimizationItem selectedOptItem)
{
if (IsActive && (selectedOptItem != null))
{
if (OptimizationItems.Contains(selectedOptItem))
{
previousActiveOptItem = activeOptItem;
activeOptItem = selectedOptItem;
OptimizationItems.ForEach(item => item.IsActive = false);
activeOptItem.IsActive = true;
}
else
{
// This exception may not be worth throwing since nothing will break if ignored.
throw new System.Exception("Trying to apply a Mutex relation but the selected item is not part of the Mutex.");
}
}
}
internal void PerturbItemRandomly(OptimizationItem optItem)
{
optItem.PropagateMutexes();
optItem.SetIndependentVariableRandomly();
PerturbedItem = optItem;
}