/// <summary>
/// Animates the values of all of the object's primitive properties
/// to the values of all of the properties with the same names
/// and types in the specified object.
/// </summary>
///
/// <param name="target">
/// the object who contains similarly named properties as the object
/// whose values should be animated to.
/// </param>
public void AnimateTo(object target)
{
// If the object is immutable, it cannot be animated.
if (IsImmutable())
{
throw new InvalidOperationException("An immutable object cannot be animated");
}
// The value being animated to needs to be the same type as the wrapped
// object.
var type = Object.GetType();
var targetType = target.GetType();
if (!type.IsAssignableFrom(targetType))
{
throw new ArgumentException("The value being animated to must be the same type as the wrapped object");
}
// Only primitive instance properties should be animated.
var searchFlags = BindingFlags.Instance;
var objectProperties = from property in type.GetProperties(searchFlags)
where property.PropertyType.IsPrimitive
select property;
var lastProperty = objectProperties.Last();
foreach (var property in objectProperties)
{
var startValue = (double)property.GetValue(Object);
var endValue = (double)property.GetValue(target);
var propertyAnimation = new ValueAnimation(startValue, endValue, DefaultDuration, DefaultInterpolator);
propertyAnimation.AnimationIncremented += (_, __) => property.SetValue(Object, propertyAnimation.CurrentValue);
this.AddAnimation(propertyAnimation);
// Once the last property is incremented, the ObjectChanged event should be triggered.
if (property.Equals(lastProperty))
{
propertyAnimation.AnimationIncremented += (_, __) =>
{
if (ObjectChanged != null)
{
ObjectChanged(this);
}
}
}
;
propertyAnimation.Start();
}
}
/// <summary>
/// Starts the specified animation.
/// </summary>
///
/// <param name="animation">
/// the animation to be started.
/// </param>
private void StartAnimation(ValueAnimation animation)
{
// Ensure the value is not already being animated.
if (Animations.Length > 1)
{
// Remove the animation, since only one animation can run at a time.
RemoveAnimation(animation, new AnimationEventArgs(animation));
return;
}
// Update the value at every animation frame.
animation.AnimationIncremented += (_, __) => Value = animation.CurrentValue;
// Start the animation.
animation.Start();
}
