/// <summary>
/// Core update routine.
/// </summary>
/// <param name="context">The context that holds information about the animation.</param>
protected override void UpdateAnimationOverride(AnimationContext context)
{
double duration = this.Duration.TimeSpan.TotalSeconds;
double startHeight = GetHeight(context.Target, this.StartHeight);
double endHeight = GetHeight(context.Target, this.EndHeight);
context.EnsureDefaultTransforms();
if (this.Width.HasValue)
{
(context.Target as FrameworkElement).Width = this.Width.Value;
}
context.Height(0, startHeight, duration, endHeight);
base.UpdateAnimationOverride(context);
}