private void UpdateSecondLevel()
{
using (Monitor.Enter())
{
var previousSecondLevel = SelectedSecondLevel;
if (SelectedFirstLevel == BaseGroup.Any)
{
SecondLevelList = EligibleBases.Select(b => b.ItemClass)
.Prepend(ItemClass.Any)
.Distinct()
.OrderBy(c => c).ToList();
}
else
{
var list = EligibleBases
.Where(b => BaseGroupEx.FromTags(b.Tags) == SelectedFirstLevel)
.Select(b => b.ItemClass)
.Distinct()
.OrderBy(c => c).ToList();
switch (list.Count)
{
case 1:
// Only contains the only class of the selected group
// -> "any" makes no sense
SecondLevelList = list;
break;
default:
SecondLevelList = list.Prepend(ItemClass.Any).ToList();
break;
}
}
SelectedSecondLevel = SecondLevelList.Contains(previousSecondLevel)
? previousSecondLevel
: SecondLevelList[0];
if (previousSecondLevel == SelectedSecondLevel)
{
UpdateThirdLevel();
}
}
}
