Banshee.Gui.Widgets.BubbleWindow.DrawShape C# (CSharp) Method

        protected override void DrawShape(Cairo.Context cr)
        {
            theme = theme ?? Hyena.Gui.Theming.ThemeEngine.CreateTheme (this);

            cr.SetSourceRGBA (0, 0, 0, 0);
            cr.Operator = Cairo.Operator.Source;
            cr.Paint ();

            var box_height = Allocation.Height - ArrowSize;
            var arrow_x = (Allocation.Width - ArrowSize) / 2;
            /*
            cr.NewPath ();

            CairoExtensions.RoundedRectangle (cr, 0, 0,
                Allocation.Width, box_height, CornerRadius);

            cr.Operator = Cairo.Operator.In;

            cr.MoveTo (arrow_x, box_height);
            cr.LineTo (Allocation.Width / 2, Allocation.Height);
            cr.LineTo (arrow_x + ArrowSize, box_height);

            cr.ClosePath ();

            var grad = new Cairo.LinearGradient (0, 0, 0, Allocation.Height);
            grad.AddColorStop (0, theme.Colors.GetWidgetColor (GtkColorClass.Background, StateType.Normal));
            grad.AddColorStop (1, theme.Colors.GetWidgetColor (GtkColorClass.Background, StateType.Active));

            cr.Operator = Cairo.Operator.Over;
            cr.Pattern = grad;
            cr.FillPreserve ();

            cr.Color = theme.Colors.GetWidgetColor (GtkColorClass.Dark, StateType.Active);
            cr.Stroke ();*/

            double x = 0, y = 0;
            double w = Allocation.Width;
            double h = box_height;
            double r = 20;

            cr.NewPath ();

            cr.MoveTo (x + r, y);
            cr.LineTo (x + w - r, y);
            cr.Arc (x + w - r, y + r, r, Math.PI * 1.5, Math.PI * 2);
            cr.LineTo (x + w, y + h - r);
            cr.Arc (x + w - r, y + h - r, r, 0, Math.PI * 0.5);
            cr.LineTo (x + r, y + h);
            cr.Arc (x + r, y + h - r, r, Math.PI * 0.5, Math.PI);
            cr.LineTo (x, y + r);
            cr.Arc (x + r, y + r, r, Math.PI, Math.PI * 1.5);

            cr.ClosePath ();

            cr.Color = new Cairo.Color (0, 0, 0, 1);
            cr.Fill ();

            //grad.Destroy ();
        }