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

            protected override void HandleHitTest(Graphics g, OlvListViewHitTestInfo hti, int x, int y)
            {
                Branch br = this.Branch;

                Rectangle r = this.Bounds;
                if (br.CanExpand) {
                    r.Offset((br.Level - 1) * PIXELS_PER_LEVEL, 0);
                    r.Width = PIXELS_PER_LEVEL;
                    if (r.Contains(x, y)) {
                        hti.HitTestLocation = HitTestLocation.ExpandButton;
                        return;
                    }
                }

                r = this.Bounds;
                int indent = br.Level * PIXELS_PER_LEVEL;
                r.X += indent;
                r.Width -= indent;

                // Ignore events in the indent zone
                if (x < r.Left) {
                    hti.HitTestLocation = HitTestLocation.Nothing;
                } else {
                    this.StandardHitTest(g, hti, r, x, y);
                }
            }