private List <Tuple <int, int> > CreateSortedItemGroupList(string prevPath
, List <Tuple <int, int> > prevSortGroupList0, List <int> orderdIdxData, gvCache cache)
{
var sortGroupList1 = new List <Tuple <int, int> >();
if (prevSortGroupList0 == null)
{ // 最初
sortGroupList1.Add(new Tuple <int, int>(0, cache.ItemsCount - 1));
}
else
{
IComparable[] values = cache.GetCache(prevPath);
foreach (var kvp1 in prevSortGroupList0)
{
IComparable prevVal1 = null;
int startIndex1 = kvp1.Item1;
int i_First1 = kvp1.Item1;
int i_Last1 = kvp1.Item2;
for (int i1 = i_First1; i1 <= i_Last1; i1++)
{
IComparable val1 = values[orderdIdxData[i1]];
if (i1 != i_First1 && NullableEqualsTo(val1, prevVal1) == false)
{// 値が変化
sortGroupList1.Add(new Tuple <int, int>(startIndex1, i1 - 1));
startIndex1 = i1;
}
prevVal1 = val1;
if (i1 == i_Last1)
{// last
sortGroupList1.Add(new Tuple <int, int>(startIndex1, i1));
}
}
}
}
return(sortGroupList1);
}
public ItemComparer(string sortBy0, ListSortDirection direction0, gvCache cache)
{
direction = direction0 == ListSortDirection.Descending ? -1 : 1;
cache.GetCache(sortBy0, out this.values, out this.dvalues, out this.isnumeric, out this.keys);
}