public override CompositionAnimation BuildCompositionAnimation()
{
if (CompositionAnimation != null)
{
return(CompositionAnimation);
}
if (TargetElement == null)
{
throw new InvalidOperationException("没有为动画提供目标对象。");
}
if (TargetProperty == VisualProperty.None)
{
throw new InvalidOperationException("没有为动画提供目标属性。");
}
CompositionAnimation?.Dispose();
CompositionAnimation = TargetVisual.Compositor.CreateExpressionAnimation(Expression);
foreach (var parameter in Parameters)
{
parameter.AddParameterToAnimation(CompositionAnimation);
}
return(CompositionAnimation);
}
public virtual void Dispose()
{
if (TargetProperty != VisualProperty.None)
{
TargetVisual?.StopAnimation(TargetProperty.ToString());
}
CompositionAnimation?.Dispose();
CompositionAnimation = null;
}
public override CompositionAnimation BuildCompositionAnimation()
{
if (CompositionAnimation != null)
{
return(CompositionAnimation);
}
if (TargetElement == null)
{
throw new InvalidOperationException("没有为动画提供目标对象。");
}
if (TargetProperty == VisualProperty.None)
{
throw new InvalidOperationException("没有为动画提供目标属性。");
}
CompositionAnimation?.Dispose();
var resultAnimation = CreateCompositionAnimation(TargetVisual.Compositor);
CompositionAnimation = resultAnimation;
resultAnimation.DelayTime = DelayTime;
resultAnimation.Duration = Duration;
resultAnimation.IterationBehavior = IterationBehavior;
resultAnimation.IterationCount = IterationCount;
resultAnimation.StopBehavior = StopBehavior;
foreach (var parameter in Parameters)
{
parameter.AddParameterToAnimation(resultAnimation);
}
foreach (var keyFrame in KeyFrames)
{
keyFrame.AddKayFrameToAnimation(resultAnimation);
}
return(CompositionAnimation);
}
internal void Stop()
{
_animation?.StopAnimation(TargetProperty);
_animation?.Dispose();
_animation = null;
}
