ZForge.Controls.TreeViewAdv.Tree.TreeViewAdv.DrawLines C# (CSharp) Метод

        private void DrawLines(Graphics gr, TreeNodeAdv node, Rectangle rowRect)
        {
            if (UseColumns && Columns.Count > 0)
                gr.SetClip(new Rectangle(0, rowRect.Y, Columns[0].Width, rowRect.Bottom));

            TreeNodeAdv curNode = node;
            while (curNode != _root && curNode != null)
            {
                int level = curNode.Level;
                int x = (level - 1) * _indent + NodePlusMinus.ImageSize / 2 + LeftMargin;
                int width = NodePlusMinus.Width - NodePlusMinus.ImageSize / 2;
                int y = rowRect.Y;
                int y2 = y + rowRect.Height;

                if (curNode == node)
                {
                    int midy = y + rowRect.Height / 2;
                    gr.DrawLine(_linePen, x, midy, x + width, midy);
                    if (curNode.NextNode == null)
                        y2 = y + rowRect.Height / 2;
                }

                if (node.Row == 0)
                    y = rowRect.Height / 2;
                if (curNode.NextNode != null || curNode == node)
                    gr.DrawLine(_linePen, x, y, x, y2);

                curNode = curNode.Parent;
            }

            gr.ResetClip();
        }