private int GetInsertCollectionIndex(TreeListViewItem item)
{
int index = -1;
ReadWriteLock.AcquireReaderLock(-1);
if (!this.Contains(item))
{
switch (SortOrder)
{
// No sortorder -> at the end of the collection
case System.Windows.Forms.SortOrder.None:
index = this.Count;
break;
default:
for (int i = 0; i < this.Count; i++)
{
// Change the index for the compare if the order is descending
int indexcompare = i;
// SortOrder == System.Windows.Forms.SortOrder.Ascending ?
// i : this.Count - (1 + i);
int comp = Comparer.Compare(item, this[indexcompare]);
if (comp <= 0)
{
index = indexcompare;
break;
}
}
index = index == -1 ? this.Count : index;
break;
}
}
ReadWriteLock.ReleaseReaderLock();
return(index);
}
private int GetInsertTreeListViewIndex(TreeListViewItem item)
{
if (TreeListView == null)
{
return(-1);
}
ReadWriteLock.AcquireReaderLock(-1);
int collectionindex = GetInsertCollectionIndex(item);
if (Owner != null)
{
int a = 0;
a++;
}
int index = -1;
// First level item (no parent)
if (Owner != null && collectionindex != -1)
{
if (collectionindex == 0)
{
index = 0;
}
else
{
index =
this[collectionindex - 1].LastChildIndexInListView + 1;
}
}
else if (Parent != null && collectionindex != -1)
{
if (!Parent.Visible || !Parent.IsExpanded)
{
index = -1;
}
else
{
if (collectionindex == 0)
{
index = Parent.Index + 1;
}
else
{
index =
Parent.Items[collectionindex - 1].LastChildIndexInListView + 1;
}
}
}
ReadWriteLock.ReleaseReaderLock();
return(index);
}
/// <summary>
/// Returns true if this collection contains an item
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public bool Contains(TreeListViewItem item)
{
bool res = false;
ReadWriteLock.AcquireReaderLock(-1);
foreach (TreeListViewItem elt in this)
{
if (item == elt)
{
res = true;
break;
}
}
ReadWriteLock.ReleaseReaderLock();
return(res);
}