Cairo.Context.TextPath C# (CSharp) Method

        public void TextPath(byte[] utf8)
        {
            CheckDisposed ();
            NativeMethods.cairo_text_path (handle, TerminateUtf8 (utf8));
        }

        protected override bool OnDrawn(Cairo.Context cr)
        {
            if (this.isDirty)
            {
                this.Rebuild();
            }

            bool baseDrawnResult = base.OnDrawn(cr);

            cr.SetFontSize(FONT_HEIGHT);
            cr.SelectFontFace("Mono", FontSlant.Normal, FontWeight.Normal);

            cr.Rectangle(0.0, 0.0, this.allocRect.Width, this.allocRect.Height);
            cr.SetSourceRGB(1, 1, 1);
            cr.Fill();

            var gradient = new LinearGradient(0.0, 0.0, 0.0, this.allocRect.Height);

            gradient.AddColorStopRgb(0.0, new Color(0.4, 0.4, 0.4));
            gradient.AddColorStopRgb(0.1, new Color(1.0, 1.0, 1.0));
            gradient.AddColorStopRgb(0.2, new Color(0.6, 0.6, 0.6));
            gradient.AddColorStopRgb(1.0, new Color(0.1, 0.1, 0.1));

            cr.LineWidth = 1;

            foreach (var box in this.boxen)
            {
                this.RoundedRect(cr, box.Rect, 4.0);
                cr.SetSource(gradient);
                cr.FillPreserve();
                cr.SetSourceRGB(0, 0, 0);
                cr.Stroke();


                int x = (int)(box.Rect.X + TAGBOX_PADDING * 2 + TAGBOX_XSIZE);
                int y = (int)(box.Rect.Y + box.Rect.Height / 2 + cr.FontExtents.Height / 2 - cr.FontExtents.Descent / 2);
                cr.MoveTo(x, y);
                cr.TextPath(box.Tag);
                cr.SetSourceRGB(1.0, 1.0, 1.0);
                cr.Fill();

                cr.MoveTo(box.Rect.X + TAGBOX_PADDING + TAGBOX_XOFFSET, box.Rect.Y + TAGBOX_PADDING + TAGBOX_XOFFSET);
                cr.RelLineTo(TAGBOX_XSIZE - TAGBOX_XOFFSET * 2, TAGBOX_XSIZE - TAGBOX_XOFFSET * 2);
                cr.MoveTo(box.Rect.X + TAGBOX_PADDING + TAGBOX_XOFFSET, box.Rect.Y + TAGBOX_PADDING + TAGBOX_XSIZE - TAGBOX_XOFFSET);
                cr.RelLineTo(TAGBOX_XSIZE - TAGBOX_XOFFSET * 2, -TAGBOX_XSIZE + TAGBOX_XOFFSET * 2);
                cr.Stroke();
            }

            return(baseDrawnResult);
        }