private void Scroller4_ZoomAnimationStarting()

in XamlControlsGallery/ControlPages/ScrollViewer2Page.xaml.cs [243:319]
63 lines of code
8 McCabe index (conditional complexity)

        private void Scroller4_ZoomAnimationStarting(muxc.ScrollViewer sender, muxc.ZoomAnimationStartingEventArgs args)
        {
            try
            {
                ScalarKeyFrameAnimation stockKeyFrameAnimation = args.Animation as ScalarKeyFrameAnimation;

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

                    if (nameof(ZoomAnimationOptions.Default) != (string)cbZoomAnimation.SelectedItem)
                    {
                        float targetZoomFactor = (float)zoomFactorSlider.Value;

                        customKeyFrameAnimation = stockKeyFrameAnimation.Compositor.CreateScalarKeyFrameAnimation();
                        float deltaZoomFactor = (float)(targetZoomFactor - sender.ZoomFactor);

                        switch ((string)cbZoomAnimation.SelectedItem)
                        {

                            case nameof(ZoomAnimationOptions.Custom1):
                                // "Accordion" case
                                for (int step = 0; step < 3; step++)
                                {
                                    customKeyFrameAnimation.InsertKeyFrame(
                                        1.0f - (0.4f / (float)Math.Pow(2, step)),
                                        targetZoomFactor + 0.1f * deltaZoomFactor);
                                    deltaZoomFactor /= -2.0f;
                                }

                                customKeyFrameAnimation.InsertKeyFrame(1.0f, targetZoomFactor);
                                break;
                            case nameof(ZoomAnimationOptions.Custom2):
                                // "Teleportation" case

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

                                StepEasingFunction stepEasingFunc = 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,
                                    targetZoomFactor - 0.75f * deltaZoomFactor,
                                    cubicBezierStart);
                                customKeyFrameAnimation.InsertKeyFrame(
                                    0.5f,
                                    targetZoomFactor - 0.25f * deltaZoomFactor,
                                    stepEasingFunc);
                                customKeyFrameAnimation.InsertKeyFrame(
                                    1.0f,
                                    targetZoomFactor,
                                    cubicBezierEnd);
                                break;
                            default:
                                break;
                        }

                        customKeyFrameAnimation.Duration = stockKeyFrameAnimation.Duration;
                        args.Animation = customKeyFrameAnimation;
                    }

                    if (!string.IsNullOrWhiteSpace(tbZoomDuration.Text))
                    {
                        double durationOverride = Convert.ToDouble(tbZoomDuration.Text);
                        customKeyFrameAnimation.Duration = TimeSpan.FromMilliseconds(durationOverride);
                    }
                }
            }
            catch (Exception ex)
            {
            }
        }