public void SnapshotAndReplace()
{
var property = new AnimatableProperty <float> {
Value = 10.0f
};
var animation = new SingleFromToByAnimation
{
From = 100.0f,
To = 200.0f,
IsAdditive = true,
};
var manager = new AnimationManager();
var controller = manager.CreateController(animation, property);
Assert.AreEqual(10.0f, property.Value);
controller.Start(AnimationTransitions.SnapshotAndReplace());
controller.UpdateAndApply();
Assert.AreEqual(110.0f, property.Value);
// Changing the base value has no effect.
property.Value = 20.0f;
manager.Update(TimeSpan.Zero);
manager.ApplyAnimations();
Assert.AreEqual(110.0f, property.Value);
// Start second animation using SnapshotAndReplace.
controller = manager.CreateController(animation, property);
Assert.AreEqual(110.0f, property.Value);
controller.Start(AnimationTransitions.SnapshotAndReplace());
controller.UpdateAndApply();
Assert.AreEqual(210.0f, property.Value);
controller.Stop();
controller.UpdateAndApply();
Assert.AreEqual(20.0f, property.Value);
}
public void SnapshotFromDelegateAnimatableProperty()
{
var testObject = new TestObject {
Value = 123.4f
};
Func <float> getter = () => testObject.Value;
Action <float> setter = f => { testObject.Value = f; };
var property = new DelegateAnimatableProperty <float>(getter, setter);
var manager = new AnimationManager();
var byAnimation = new SingleFromToByAnimation
{
Duration = TimeSpan.Zero,
By = 25.0f,
};
var controller = manager.StartAnimation(byAnimation, property, AnimationTransitions.SnapshotAndReplace());
controller.UpdateAndApply();
// The DelegateAnimatableProperty<T> does not provide a base value.
// --> No snapshot is created.
Assert.AreEqual(25.0f, testObject.Value); // 0.0f (SingleTraits.Identity) + 25.0f (By Animation)
}
public void AnimationShapshots()
{
var property = new AnimatableProperty <float> {
Value = 10.0f
};
var manager = new AnimationManager();
var byAnimation = new SingleFromToByAnimation
{
Duration = TimeSpan.Zero,
By = 25.0f,
};
var byController = manager.CreateController(byAnimation, property);
Assert.AreEqual(10.0f, property.Value);
// Without snapshot.
byController.Start(AnimationTransitions.Replace());
byController.UpdateAndApply();
Assert.AreEqual(35.0f, property.Value);
property.Value = 100.0f;
manager.Update(TimeSpan.Zero);
manager.ApplyAnimations();
Assert.AreEqual(125.0f, property.Value);
byController.Stop();
byController.UpdateAndApply();
Assert.AreEqual(100.0f, property.Value);
// With snapshot.
property.Value = 10.0f;
byController.Start(AnimationTransitions.SnapshotAndReplace());
byController.UpdateAndApply();
Assert.AreEqual(35.0f, property.Value);
property.Value = 100.0f;
manager.Update(TimeSpan.Zero);
manager.ApplyAnimations();
Assert.AreEqual(35.0f, property.Value);
// Create another snapshot.
var additiveAnimation = new SingleFromToByAnimation
{
Duration = TimeSpan.Zero,
To = 200.0f,
IsAdditive = true,
};
var additiveController = manager.CreateController(additiveAnimation, property);
additiveController.Start(AnimationTransitions.SnapshotAndReplace());
additiveController.UpdateAndApply();
Assert.AreEqual(235.0f, property.Value);
byController.Stop();
Assert.AreEqual(235.0f, property.Value);
byController.Start(AnimationTransitions.Replace());
byController.UpdateAndApply();
Assert.AreEqual(60.0f, property.Value); // 35.0f (Snapshot) + 25.0f (By Animation)
}
