/// <summary>
/// Sets the Expression property of ExpressionAnimation by converting
/// the given Expression to appropriate string
/// </summary>
/// <typeparam name="T">Type of the Expression</typeparam>
/// <param name="animation">ExpressionAnimation</param>
/// <param name="expression">Expression</param>
/// <returns>Dictionary of parameter names and the parameters</returns>
public static Dictionary <string, object> SetExpression <T>(this ExpressionAnimation animation,
Expression <CompositionLambda <T> > expression)
{
var result = CompositionExpressionEngine.CreateCompositionExpression(expression);
animation.Expression = result.Expression;
animation.SetParameters(result.Parameters);
return(result.Parameters);
}
/// <summary>
/// Inserts a KeyFrame in the KeyFrameAnimation by converting
/// the given Expression to appropriate string
/// </summary>
/// <typeparam name="T">Type of the Expression</typeparam>
/// <param name="animation">KeyFrameAnimation</param>
/// <param name="normalizedProgressKey">The time the key frame should occur at, expressed as
/// a percentage of the animation Duration. Allowed value is from 0.0 to 1.0.</param>
/// <param name="expression">The expression used to calculate the value of the key frame.</param>
/// <param name="easingFunction">Easing Function (optional)</param>
/// <returns>KeyFrameAnimation</returns>
public static KeyFrameAnimation InsertExpressionKeyFrame <T>(this KeyFrameAnimation animation, float normalizedProgressKey,
Expression <CompositionLambda <T> > expression, CompositionEasingFunction easingFunction = null)
{
var result = CompositionExpressionEngine.CreateCompositionExpression(expression);
animation.InsertExpressionKeyFrame(normalizedProgressKey, result.Expression, easingFunction);
animation.SetParameters(result.Parameters);
return(animation);
}
/// <summary>
/// Creates an ExpressionAnimation based on the given CompositionLambda Expression
/// </summary>
/// <typeparam name="T">Type of the CompositionLambda Expression</typeparam>
/// <param name="compositor">Compositor</param>
/// <param name="expression">CompositionLambda Expression</param>
/// <returns>ExpressionAnimation</returns>
public static ExpressionAnimation CreateExpressionAnimation <T>(this Compositor compositor,
Expression <CompositionLambda <T> > expression)
{
var result = CompositionExpressionEngine.CreateCompositionExpression(expression);
var animation = compositor.CreateExpressionAnimation();
animation.Expression = result.Expression;
animation.SetParameters(result.Parameters);
return(animation);
}