public bool IsLeaf(TreeNode node)
{
if (node != null)
{
return(TreeNodeUtilities.IsLeaf(node));
}
return(false);
}
public int Compare(object x, object y)
{
TreeNode tx = (TreeNode)x;
TreeNode ty = (TreeNode)y;
bool txIsLeaf = TreeNodeUtilities.IsLeaf(tx);
bool tyIsLeaf = TreeNodeUtilities.IsLeaf(ty);
int value = 0;
if (txIsLeaf == tyIsLeaf)
{
value = tx.Text.CompareTo(ty.Text);
}
else
{
value = txIsLeaf ? 1 : -1;
}
return(value);
}