ComponentFactory.Krypton.Toolkit.RenderStandard.DrawRibbonTabContextSelected C# (CSharp) Method

        protected virtual IDisposable DrawRibbonTabContextSelected(PaletteRibbonShape shape,
                                                                   RenderContext context,
                                                                   Rectangle rect,
                                                                   PaletteState state,
                                                                   IPaletteRibbonBack palette,
                                                                   VisualOrientation orientation,
                                                                   IDisposable memento)
        {
            if ((rect.Width > 0) && (rect.Height > 0))
            {
                Color c1 = palette.GetRibbonBackColor1(state);
                Color c2 = palette.GetRibbonBackColor2(state);

                bool generate = true;
                MementoRibbonTabContextSelected cache;

                // Access a cache instance and decide if cache resources need generating
                if ((memento == null) || !(memento is MementoRibbonTabContextSelected))
                {
                    if (memento != null)
                        memento.Dispose();

                    cache = new MementoRibbonTabContextSelected(rect, c1, c2, orientation);
                    memento = cache;
                }
                else
                {
                    cache = (MementoRibbonTabContextSelected)memento;
                    generate = !cache.UseCachedValues(rect, c1, c2, orientation);
                }

                // Do we need to generate the contents of the cache?
                if (generate)
                {
                    // Dispose of existing values
                    cache.Dispose();

                    switch (orientation)
                    {
                        case VisualOrientation.Top:
                            DrawRibbonTabContextSelectedTop(rect, c2, cache);
                            break;
                        case VisualOrientation.Left:
                            DrawRibbonTabContextSelectedLeft(rect, c2, cache);
                            break;
                        case VisualOrientation.Right:
                            DrawRibbonTabContextSelectedRight(rect, c2, cache);
                            break;
                        case VisualOrientation.Bottom:
                            DrawRibbonTabContextSelectedBottom(rect, c2, cache);
                            break;
                    }

                    cache.outsidePen = new Pen(c1);
                    cache.l1 = new Pen(Color.FromArgb(100, c2));
                    cache.l2 = new Pen(Color.FromArgb(75, c2));
                    cache.l3 = new Pen(Color.FromArgb(48, c2));
                    cache.bottomInnerPen = new Pen(Color.FromArgb(70, c2));
                    cache.bottomOuterPen = new Pen(Color.FromArgb(100, c2));
                }

                // Fill the interior using a gradient brush
                context.Graphics.FillRectangle(Brushes.White, cache.interiorRect);
                context.Graphics.FillRectangle(cache.insideBrush, cache.interiorRect);

                // Draw the actual border
                using (AntiAlias aa = new AntiAlias(context.Graphics))
                    context.Graphics.DrawPath(cache.outsidePen, cache.outsidePath);

                switch (orientation)
                {
                    case VisualOrientation.Top:
                        DrawRibbonTabContextSelectedTopDraw(rect, cache, context.Graphics);
                        break;
                    case VisualOrientation.Left:
                        DrawRibbonTabContextSelectedLeftDraw(rect, cache, context.Graphics);
                        break;
                    case VisualOrientation.Right:
                        DrawRibbonTabContextSelectedRightDraw(rect, cache, context.Graphics);
                        break;
                    case VisualOrientation.Bottom:
                        DrawRibbonTabContextSelectedBottomDraw(rect, cache, context.Graphics);
                        break;
                }
            }

            return memento;
        }