private Storyboard CreateTransitionStoryboard()

in src/Microsoft.Xaml.Behaviors/Layout/FluidMoveBehavior.cs [614:678]
56 lines of code
12 McCabe index (conditional complexity)

        private Storyboard CreateTransitionStoryboard(FrameworkElement child, bool usingBeforeLoaded, ref Rect layoutRect, ref Rect currentRect)
        {
            Duration duration = this.Duration;
            Storyboard transitionStoryboard = new Storyboard();
            transitionStoryboard.Duration = duration;

            double xScaleFrom = (!usingBeforeLoaded || layoutRect.Width == 0.0) ? 1.0 : (currentRect.Width / layoutRect.Width);
            double yScaleFrom = (!usingBeforeLoaded || layoutRect.Height == 0.0) ? 1.0 : (currentRect.Height / layoutRect.Height);
            double xFrom = currentRect.Left - layoutRect.Left;
            double yFrom = currentRect.Top - layoutRect.Top;

            TransformGroup transform = new TransformGroup();
            transform.Children.Add(new ScaleTransform() { ScaleX = xScaleFrom, ScaleY = yScaleFrom });
            transform.Children.Add(new TranslateTransform() { X = xFrom, Y = yFrom });
            AddTransform(child, transform);

            string prefix = "(FrameworkElement.RenderTransform).";

            TransformGroup transformGroup = child.RenderTransform as TransformGroup;
            if (transformGroup != null && GetHasTransformWrapper(child))
            {
                prefix += "(TransformGroup.Children)[" + (transformGroup.Children.Count - 1) + "].";
            }

            if (usingBeforeLoaded)
            {
                if (xScaleFrom != 1.0)
                {
                    DoubleAnimation xScaleAnimation = new DoubleAnimation() { Duration = duration, From = xScaleFrom, To = 1.0 };
                    Storyboard.SetTarget(xScaleAnimation, child);
                    Storyboard.SetTargetProperty(xScaleAnimation, new PropertyPath(prefix + "(TransformGroup.Children)[0].(ScaleTransform.ScaleX)", new object[0]));
                    xScaleAnimation.EasingFunction = this.EaseX;
                    transitionStoryboard.Children.Add(xScaleAnimation);
                }

                if (yScaleFrom != 1.0)
                {
                    DoubleAnimation yScaleAnimation = new DoubleAnimation() { Duration = duration, From = yScaleFrom, To = 1.0 };
                    Storyboard.SetTarget(yScaleAnimation, child);
                    Storyboard.SetTargetProperty(yScaleAnimation, new PropertyPath(prefix + "(TransformGroup.Children)[0].(ScaleTransform.ScaleY)", new object[0]));
                    yScaleAnimation.EasingFunction = this.EaseY;
                    transitionStoryboard.Children.Add(yScaleAnimation);
                }
            }

            if (xFrom != 0.0)
            {
                DoubleAnimation xAnimation = new DoubleAnimation() { Duration = duration, From = xFrom, To = 0.0 };
                Storyboard.SetTarget(xAnimation, child);
                Storyboard.SetTargetProperty(xAnimation, new PropertyPath(prefix + "(TransformGroup.Children)[1].(TranslateTransform.X)", new object[0]));
                xAnimation.EasingFunction = this.EaseX;
                transitionStoryboard.Children.Add(xAnimation);
            }

            if (yFrom != 0.0)
            {
                DoubleAnimation yAnimation = new DoubleAnimation() { Duration = duration, From = yFrom, To = 0.0 };
                Storyboard.SetTarget(yAnimation, child);
                Storyboard.SetTargetProperty(yAnimation, new PropertyPath(prefix + "(TransformGroup.Children)[1].(TranslateTransform.Y)", new object[0]));
                yAnimation.EasingFunction = this.EaseY;
                transitionStoryboard.Children.Add(yAnimation);
            }

            return transitionStoryboard;
        }