Pinta.ColorGradientWidget.DrawTriangles C# (CSharp) Method

        private void DrawTriangles(Context g)
        {
            int px, py;
            Gdk.ModifierType mask;
            GdkWindow.GetPointer (out px, out py, out mask);

            Rectangle rect = GradientRectangle;
            Rectangle all = Allocation.ToCairoRectangle();

            int index = FindValueIndex (py);

            for (int i = 0; i < Count; i++) {

                double val = vals [i];
                double y = GetYFromValue (val);
                bool hoover = ((index == i)) && (all.ContainsPoint (px, py) || ValueIndex != -1);
                Color color = hoover ? new Color (0.1, 0.1, 0.9) : new Color (0.1, 0.1, 0.1);

                //left triangle
                PointD[] points = new PointD[] { new PointD (rect.X, y),
                                                 new PointD (rect.X - xpad * rect.Width, y + ypad * rect.Height),
                                                 new PointD (rect.X - xpad * rect.Width, y - ypad * rect.Height) };
                g.FillPolygonal (points, color);

                double x = rect.X + rect.Width;
                //right triangle
                PointD[] points2 = new PointD[] { new PointD (x , y),
                                                  new PointD (x + xpad * rect.Width, y + ypad * rect.Height),
                                                  new PointD (x + xpad * rect.Width, y - ypad * rect.Height) };
                g.FillPolygonal (points2, color);
            }
        }