Vector2KeyFrameAnimation CreateAnimation()
{
Vector2KeyFrameAnimation animation = _compositor.CreateVector2KeyFrameAnimation();
animation.InsertExpressionKeyFrame(0f, "this.StartingValue");
animation.InsertExpressionKeyFrame(1f, "this.FinalValue");
animation.Target = "Size";
animation.Duration = TimeSpan.FromSeconds(1);
return(animation);
}
/// <summary>
/// Creates a <see cref="ScalarKeyFrameAnimation"/> instance with the given parameters to on a target element, using an expression animation
/// </summary>
/// <param name="compositor">The current <see cref="Compositor"/> instance used to create the animation</param>
/// <param name="from">The optional starting value for the animation</param>
/// <param name="to">A string that indicates the final value for the animation</param>
/// <param name="duration">The animation duration</param>
/// <param name="delay">The optional initial delay for the animation</param>
/// <param name="ease">The optional easing function for the animation</param>
public static Vector2KeyFrameAnimation CreateVector2KeyFrameAnimation(
this Compositor compositor,
Vector2? from, string to,
TimeSpan duration, TimeSpan? delay,
CompositionEasingFunction ease = null)
{
// Set duration and delay time
Vector2KeyFrameAnimation ani = compositor.CreateVector2KeyFrameAnimation();
ani.Duration = duration;
if (delay.HasValue) ani.DelayTime = delay.Value;
// Insert "to" and "from" keyframes
ani.InsertExpressionKeyFrame(1, to, ease ?? compositor.CreateLinearEasingFunction());
if (from.HasValue) ani.InsertKeyFrame(0, from.Value);
return ani;
}