private void Scroller4_ScrollAnimationStarting()

in XamlControlsGallery/ControlPages/ScrollViewer2Page.xaml.cs [153:237]
68 lines of code
8 McCabe index (conditional complexity)

        private void Scroller4_ScrollAnimationStarting(muxc.ScrollViewer sender, muxc.ScrollAnimationStartingEventArgs args)
        {
            try
            {
                Vector3KeyFrameAnimation stockKeyFrameAnimation = args.Animation as Vector3KeyFrameAnimation;

                if (stockKeyFrameAnimation != null)
                {
                    Vector3KeyFrameAnimation customKeyFrameAnimation = stockKeyFrameAnimation;

                    if (nameof(ScrollAnimationOptions.Default) != (string)cbAnimation.SelectedItem)
                    {
                        double targetHorizontalOffset = args.EndPosition.X;
                        float targetHorizontalPosition = ComputeHorizontalPositionFromOffset(sender.Content, targetHorizontalOffset, sender.ZoomFactor);

                        double targetVerticalOffset = args.EndPosition.Y;
                        float targetVerticalPosition = ComputeVerticalPositionFromOffset(sender.Content, targetVerticalOffset, sender.ZoomFactor);

                        customKeyFrameAnimation = stockKeyFrameAnimation.Compositor.CreateVector3KeyFrameAnimation();

                        float deltaHorizontalPosition = (float)(targetHorizontalOffset - sender.HorizontalOffset);
                        float deltaVerticalPosition = (float)(targetVerticalOffset - sender.VerticalOffset);

                        switch ((string)cbAnimation.SelectedItem)
                        {
                            case nameof(ScrollAnimationOptions.Custom1):
                                // "Accordion" case
                                for (int keyframe = 0; keyframe < 3; keyframe++)
                                {
                                    customKeyFrameAnimation.InsertKeyFrame(
                                        1.0f - (0.4f / (float)Math.Pow(2, keyframe)),
                                        new Vector3(targetHorizontalPosition + 0.1f * deltaHorizontalPosition, targetVerticalPosition + 0.1f * deltaVerticalPosition, 0.0f));

                                    deltaHorizontalPosition /= -2.0f;
                                    deltaVerticalPosition /= -2.0f;
                                }

                                customKeyFrameAnimation.InsertKeyFrame(1.0f, new Vector3(targetHorizontalPosition, targetVerticalPosition, 0.0f));
                                break;
                            case nameof(ScrollAnimationOptions.Custom2):
                                // "Teleportation" case
                                CubicBezierEasingFunction cubicBezierStart = stockKeyFrameAnimation.Compositor.CreateCubicBezierEasingFunction(
                                    new Vector2(1.0f, 0.0f),
                                    new Vector2(1.0f, 0.0f));

                                StepEasingFunction step = stockKeyFrameAnimation.Compositor.CreateStepEasingFunction(1);

                                CubicBezierEasingFunction cubicBezierEnd = stockKeyFrameAnimation.Compositor.CreateCubicBezierEasingFunction(
                                    new Vector2(0.0f, 1.0f),
                                    new Vector2(0.0f, 1.0f));

                                customKeyFrameAnimation.InsertKeyFrame(
                                    0.499999f,
                                    new Vector3(targetHorizontalPosition - 0.75f * deltaHorizontalPosition, targetVerticalPosition - 0.75f * deltaVerticalPosition, 0.0f),
                                    cubicBezierStart);
                                customKeyFrameAnimation.InsertKeyFrame(
                                    0.5f,
                                    new Vector3(targetHorizontalPosition - 0.25f * deltaHorizontalPosition, targetVerticalPosition - 0.25f * deltaVerticalPosition, 0.0f),
                                    step);
                                customKeyFrameAnimation.InsertKeyFrame(
                                    1.0f,
                                    new Vector3(targetHorizontalPosition, targetVerticalPosition, 0.0f),
                                    cubicBezierEnd);
                                break;
                            default:
                                break;
                        }

                        customKeyFrameAnimation.Duration = stockKeyFrameAnimation.Duration;
                    }

                    if (!string.IsNullOrWhiteSpace(tbAnimDuration.Text))
                    {
                        // Override animation duration
                        double durationOverride = Convert.ToDouble(tbAnimDuration.Text);
                        customKeyFrameAnimation.Duration = TimeSpan.FromMilliseconds(durationOverride);
                    }

                    args.Animation = customKeyFrameAnimation;
                }
            }
            catch (Exception ex)
            {
            }
        }