internal static SharpTreeNode GetNodeByVisibleIndex(SharpTreeNode root, int index)
{
root.GetTotalListLength(); // ensure all list lengths are calculated
Debug.Assert(index >= 0);
Debug.Assert(index < root.totalListLength);
SharpTreeNode node = root;
while (true)
{
if (node.left != null && index < node.left.totalListLength)
{
node = node.left;
}
else
{
if (node.left != null)
{
index -= node.left.totalListLength;
}
if (node.isVisible)
{
if (index == 0)
{
return(node);
}
index--;
}
node = node.right;
}
}
}
internal int GetTotalListLength()
{
if (totalListLength >= 0)
{
return(totalListLength);
}
int length = (isVisible ? 1 : 0);
if (left != null)
{
length += left.GetTotalListLength();
}
if (right != null)
{
length += right.GetTotalListLength();
}
return(totalListLength = length);
}
