if (reactionKnown)

            {

                reactedColor.Set(recipe.ReactedColor);

                reactionSwatch.Color = reactedColor;

            }

            else

            {

                reactionSwatch.Clear(); 

            }

        }

        unsafe bool CaptureReactionColor()

        {

            // Take a screenshot.

            int screenWidth, screenHeight;

            bool debugScreenshot = false;

            bool enableDebugMenu = false;

            Gdk.Window rootWindow = Gdk.Global.DefaultRootWindow;

            DesertPaintLab.AppSettings.Get("ScreenWidth", out screenWidth);

            DesertPaintLab.AppSettings.Get("ScreenHeight", out screenHeight);

            DesertPaintLab.AppSettings.Get("EnableDebugMenu", out enableDebugMenu);

            DesertPaintLab.AppSettings.Get("DebugScreenshot", out debugScreenshot);

            Gdk.Image rootImage = rootWindow.GetImage(0, 0, screenWidth, screenHeight);

            screenBuffer.GetFromImage(rootImage, rootImage.Colormap, 0, 0, 0, 0, screenWidth, screenHeight);

            //screenBuffer.GetFromDrawable(rootWindow,

            //  rootWindow.Colormap, 0, 0, 0, 0, screenWidth, screenHeight);

            int stride = screenBuffer.Rowstride;

            byte* pixBytes = (byte*)screenBuffer.Pixels;

            int redPixelStart = -1;

            StreamWriter log = null;

            if (enableDebugMenu)

            {

                string logfile = FileUtils.FindNumberedFile("DesertPaintLab_Capture", "log", Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments));

                log = new StreamWriter(logfile);

                ReactionRecorder.Instance.Log = log;

            }

            isCaptured = ReactionRecorder.Instance.CaptureReaction(pixBytes, screenWidth, screenHeight, stride, ref reactedColor, ref redPixelStart);

            if (log != null)

            {

                log.Flush();

                log.Close();

                log = null;

            }

            if (enableDebugMenu && debugScreenshot)

            {

                if (!isCaptured)

                {