private void UpdateOptionComparisons()
{
var currentHashCodes = new HashSet <int>(OptionComparisons.Select(c => c.GetHashCode()));
var proposedHashCodes = new HashSet <int>();
foreach (var crit in Criteria.Items)
{
for (int i = 0; i < Options.Items.Count(); i++)
{
for (int j = i + 1; j < Options.Items.Count(); j++)
{
var oc = new OptionComparison(crit, Options.Items.ElementAt(i), Options.Items.ElementAt(j));
oc.OnWeightChange += OnWeightChange;
var hashCode = oc.GetHashCode();
proposedHashCodes.Add(hashCode);
if (!currentHashCodes.Contains(hashCode))
{
OptionComparisons.Add(oc);
}
}
}
}
foreach (var exitstingOc in OptionComparisons.ToList())
{
if (!proposedHashCodes.Contains(exitstingOc.GetHashCode()))
{
exitstingOc.OnWeightChange -= OnWeightChange;
OptionComparisons.Remove(exitstingOc);
}
}
OptionComparisons = OptionComparisons.OrderBy(b => b.Criterion).ToList();
}
