/// <internalonly />
protected internal override ProceduralAnimation CreateEffectAnimation(EffectDirection direction)
{
if (_effects.Count == 0)
{
throw new InvalidOperationException("A CompositeEffect must have more than 1 nested child effect.");
}
if (_childrenInitialized == false)
{
foreach (Effect childEffect in _effects)
{
((IAttachedObject)childEffect).Attach(AssociatedObject);
}
_childrenInitialized = true;
}
List <ProceduralAnimation> animations = new List <ProceduralAnimation>(_effects.Count);
foreach (Effect childEffect in _effects)
{
EffectDirection childDirection = direction;
if (childEffect.AutoReverse)
{
childDirection = EffectDirection.Forward;
}
ProceduralAnimation childAnimation = childEffect.CreateEffectAnimation(childDirection);
if (childAnimation != null)
{
animations.Add(childAnimation);
}
}
if (animations.Count != 0)
{
ProceduralAnimation[] animationItems = animations.ToArray();
if (_composition == EffectComposition.Parallel)
{
ProceduralAnimationSet animation = new ProceduralAnimationSet(animationItems);
animation.AutoReverse = AutoReverse;
return(animation);
}
else
{
ProceduralAnimationSequence animation = new ProceduralAnimationSequence(animationItems);
animation.AutoReverse = AutoReverse;
return(animation);
}
}
return(null);
}
protected override ProceduralAnimation CreateEffectAnimation(EffectDirection direction)
{
FrameworkElement target = GetTarget();
ScaleTransform scaleTransform = target.RenderTransform as ScaleTransform;
if (scaleTransform == null)
{
scaleTransform = new ScaleTransform();
target.RenderTransform = scaleTransform;
target.RenderTransformOrigin = new Point(0.5, 0.5);
}
TimeSpan halfDuration = TimeSpan.FromMilliseconds(Duration.TotalMilliseconds / 2);
TweenInterpolation interpolation = GetEffectiveInterpolation();
// A FlashBulb effect basically grows the element and makes it transparent
// half way and then restores the element to its initial state during the
// 2nd half of the animation.
// This is accomplished with three animations that auto-reverse.
// As a result the animations are the same regardless of effect direction.
DoubleAnimation opacityAnimation =
new DoubleAnimation(target, UIElement.OpacityProperty, halfDuration, 0.25);
DoubleAnimation scaleXAnimation =
new DoubleAnimation(scaleTransform, ScaleTransform.ScaleXProperty, halfDuration, 1.1);
DoubleAnimation scaleYAnimation =
new DoubleAnimation(scaleTransform, ScaleTransform.ScaleYProperty, halfDuration, 1.1);
opacityAnimation.Interpolation = interpolation;
scaleXAnimation.Interpolation = interpolation;
scaleYAnimation.Interpolation = interpolation;
// Create a composite animation that plays all three in parallel
ProceduralAnimation animation =
new ProceduralAnimationSet(opacityAnimation, scaleXAnimation, scaleYAnimation);
animation.AutoReverse = true;
return(animation);
}
/// <internalonly />
protected internal override ProceduralAnimation CreateEffectAnimation(EffectDirection direction)
{
if (_translateTransform == null)
{
Transform existingTransform = GetTarget().RenderTransform;
if (existingTransform != null)
{
_translateTransform = existingTransform as TranslateTransform;
if (_translateTransform == null)
{
TransformGroup transformGroup = existingTransform as TransformGroup;
if (transformGroup != null)
{
foreach (Transform transform in transformGroup.Children)
{
_translateTransform = transform as TranslateTransform;
if (_translateTransform != null)
{
break;
}
}
}
}
}
if (_translateTransform == null)
{
throw new InvalidOperationException("The element does not have a translate transform associated with it.");
}
_initialX = _translateTransform.X;
_initialY = _translateTransform.Y;
}
TweenInterpolation interpolation = GetEffectiveInterpolation();
DoubleAnimation xAnimation = null;
DoubleAnimation yAnimation = null;
if (_horizontalMovement != 0)
{
double targetValue = direction == EffectDirection.Forward ? _horizontalMovement : _initialX;
xAnimation = new DoubleAnimation(_translateTransform, TranslateTransform.XProperty, Duration, targetValue);
xAnimation.Interpolation = interpolation;
}
if (_verticalMovement != 0)
{
double targetValue = direction == EffectDirection.Forward ? _verticalMovement : _initialY;
yAnimation = new DoubleAnimation(_translateTransform, TranslateTransform.YProperty, Duration, targetValue);
yAnimation.Interpolation = interpolation;
}
if ((xAnimation != null) && (yAnimation != null))
{
ProceduralAnimationSet animation = new ProceduralAnimationSet(xAnimation, yAnimation);
animation.AutoReverse = AutoReverse;
return(animation);
}
else if (xAnimation != null)
{
xAnimation.AutoReverse = AutoReverse;
return(xAnimation);
}
else if (yAnimation != null)
{
yAnimation.AutoReverse = AutoReverse;
return(yAnimation);
}
return(null);
}