internal void EvaluateAnimatedValue(
PropertyMetadata metadata,
ref EffectiveValueEntry entry)
{
DependencyObject d = (DependencyObject)_dependencyObject.Target;
if (d == null)
{
return;
}
object value = entry.GetFlattenedEntry(RequestFlags.FullyResolved).Value;
if (entry.IsDeferredReference)
{
DeferredReference dr = (DeferredReference)value;
value = dr.GetValue(entry.BaseValueSourceInternal);
// Set the baseValue back into the entry
entry.SetAnimationBaseValue(value);
}
object animatedValue = GetCurrentPropertyValue(this, d, _dependencyProperty, metadata, value);
if (!_dependencyProperty.IsValidValueInternal(animatedValue))
{
// If the animation(s) applied to the property have calculated an
// invalid value for the property then raise an exception.
throw new InvalidOperationException(
SR.Get(
SRID.Animation_CalculatedValueIsInvalidForProperty,
_dependencyProperty.Name,
null));
}
entry.SetAnimatedValue(animatedValue, value);
}
/// <summary>
/// Check to see if there is a complex path that started with the
/// given target object and property. If so, process the complex path
/// information and return the results.
/// </summary>
internal static void GetComplexPathValue(
DependencyObject targetObject,
DependencyProperty targetProperty,
ref EffectiveValueEntry entry,
PropertyMetadata metadata)
{
CloneCacheEntry cacheEntry = GetComplexPathClone(targetObject, targetProperty);
if (cacheEntry != null)
{
object baseValue = entry.Value;
if (baseValue == DependencyProperty.UnsetValue)
{
// If the incoming baseValue is DependencyProperty.UnsetValue, that
// means the current property value is the default value. Either
// the cacheEntry.Clone was a clone of a default value (and should be
// returned to the caller) or someone called ClearValue() (and
// cacheEntry.Clone should be cleared accordingly).
// To distinguish these cases we must check the cached source
// against the default value.
//
// We don't have to handle the ClearValue case in this clause;
// the comparison with the cached source to the base value
// will fail in that case (since the cached source won't be UnsetValue)
// and we'll clear out the cache.
Debug.Assert(cacheEntry.Source != DependencyProperty.UnsetValue,
"Storyboard complex path’s clone cache should never contain DependencyProperty.UnsetValue. Either something went wrong in Storyboard.ProcessComplexPath() or somebody else is messing with the Storyboard clone cache.");
if (cacheEntry.Source == metadata.GetDefaultValue(targetObject, targetProperty))
{
// The cacheEntry.Clone is the clone of the default value. In normal
// non-Storyboard code paths, BaseValueSourceInternal is Unknown for default
// values at this time, so we need to switch it over explicitly.
//
// And to prevent DependencyObject.UpdateEffectiveValue from misconstruing this
// as an unaltered default value (which would result in UEV thinking no change
// in value occurred and discarding this new value), we will go ahead and set the
// animated value modifier on this value entry. (jeffbog: B#1616678 5/19/2006)
//
// In all other cases, valueSource should have the correct
// valueSource corresponding to the object we cloned from,
// so we don't need to do anything.
entry.BaseValueSourceInternal = BaseValueSourceInternal.Default;
entry.SetAnimatedValue(cacheEntry.Clone, DependencyProperty.UnsetValue);
return;
}
}
// If the incoming baseValue is a deferred object, we need to get the
// real value to make a valid comparison against the cache entry source.
DeferredReference deferredBaseValue = baseValue as DeferredReference;
if (deferredBaseValue != null)
{
baseValue = deferredBaseValue.GetValue(entry.BaseValueSourceInternal);
entry.Value = baseValue;
}
// If the incoming baseValue is different from the original source object that
// we cloned and cached then we need to invalidate this cache. Otherwise we use
// the value in the cache as is.
if (cacheEntry.Source == baseValue)
{
CloneEffectiveValue(ref entry, cacheEntry);
return;
}
else
{
// Setting to DependencyProperty.UnsetValue is how FrugalMap does delete.
SetComplexPathClone(
targetObject,
targetProperty,
DependencyProperty.UnsetValue,
DependencyProperty.UnsetValue);
}
}
}
internal void EvaluateAnimatedValue(
PropertyMetadata metadata,
ref EffectiveValueEntry entry)
{
DependencyObject d = (DependencyObject)_dependencyObject.Target;
if (d == null)
{
return;
}
object value = entry.GetFlattenedEntry(RequestFlags.FullyResolved).Value;
if (entry.IsDeferredReference)
{
DeferredReference dr = (DeferredReference)value;
value = dr.GetValue(entry.BaseValueSourceInternal);
// Set the baseValue back into the entry
entry.SetAnimationBaseValue(value);
}
object animatedValue = GetCurrentPropertyValue(this, d, _dependencyProperty, metadata, value);
if (!_dependencyProperty.IsValidValueInternal(animatedValue))
{
// If the animation(s) applied to the property have calculated an
// invalid value for the property then raise an exception.
throw new InvalidOperationException(
SR.Get(
SRID.Animation_CalculatedValueIsInvalidForProperty,
_dependencyProperty.Name,
null));
}
entry.SetAnimatedValue(animatedValue, value);
}
