BrightIdeasSoftware.TreeListView.TreeRenderer.DrawLines C# (CSharp) Method

            protected virtual void DrawLines(Graphics g, Rectangle r, Pen p, Branch br, int glyphMidVertical)
            {
                Rectangle r2 = r;
                r2.Width = PIXELS_PER_LEVEL;

                // Vertical lines have to start on even points, otherwise the dotted line looks wrong.
                // This is only needed if pen is dotted.
                int top = r2.Top;
                //if (p.DashStyle == DashStyle.Dot && (top & 1) == 0)
                //    top += 1;

                // Draw lines for ancestors
                int midX;
                IList<Branch> ancestors = br.Ancestors;
                foreach (Branch ancestor in ancestors) {
                    if (!ancestor.IsLastChild && !ancestor.IsOnlyBranch) {
                        midX = r2.Left + r2.Width / 2;
                        g.DrawLine(p, midX, top, midX, r2.Bottom);
                    }
                    r2.Offset(PIXELS_PER_LEVEL, 0);
                }

                // Draw lines for this branch
                midX = r2.Left + r2.Width / 2;

                // Horizontal line first
                g.DrawLine(p, midX, glyphMidVertical, r2.Right, glyphMidVertical);

                // Vertical line second
                if (br.IsFirstBranch) {
                    if (!br.IsLastChild && !br.IsOnlyBranch)
                        g.DrawLine(p, midX, glyphMidVertical, midX, r2.Bottom);
                } else {
                    if (br.IsLastChild)
                        g.DrawLine(p, midX, top, midX, glyphMidVertical);
                    else
                        g.DrawLine(p, midX, top, midX, r2.Bottom);
                }
            }