Pinta.ColorPaletteWidget.PointToPalette C# (CSharp) Method

        private int PointToPalette(int x, int y)
        {
            int col = -1;
            int row = 0;

            if (x >= 7 && x < 22)
                col = 0;
            else if (x >= 22 && x < 38)
                col = 16;
            else if (x >= 38 && x < 54)
                col = 32;
            else
                return -1;

            if (y < 60 || y > 60 + (16 * 15))
                return -1;

            row = (y - 60) / 15;

            return col + row;
        }