private static void AssignReorderAnimation(ListViewBase listView, TimeSpan duration)
{
Compositor compositor = ElementCompositionPreview.GetElementVisual(listView).Compositor;
ImplicitAnimationCollection animationCollection = (ImplicitAnimationCollection)listView.GetValue(ReorderAnimationProperty);
if (animationCollection is null)
{
animationCollection = compositor.CreateImplicitAnimationCollection();
listView.SetValue(ReorderAnimationProperty, animationCollection);
}
if (duration == TimeSpan.Zero)
{
animationCollection.Remove(nameof(Visual.Offset));
}
else
{
Vector3KeyFrameAnimation offsetAnimation = compositor.CreateVector3KeyFrameAnimation();
offsetAnimation.InsertExpressionKeyFrame(1.0f, "this.FinalValue");
offsetAnimation.Duration = duration;
offsetAnimation.Target = nameof(Visual.Offset);
CompositionAnimationGroup animationGroup = compositor.CreateAnimationGroup();
animationGroup.Add(offsetAnimation);
animationCollection[nameof(Visual.Offset)] = animationGroup;
}
}
