private void OnCurrentTimeInvalidated(object sender, EventArgs args)
{
object target = _dependencyObject.Target;
if (target == null)
{
// If the target has been garbage collected, remove this handler
// from the AnimationClock so that this collection can be
// released also.
DetachAnimationClock((AnimationClock)sender, _removeRequestedHandler);
}
else
{
// recompute animated value
try
{
DependencyObject targetDO = ((DependencyObject)target);
// fetch the existing entry
EffectiveValueEntry oldEntry = targetDO.GetValueEntry(
targetDO.LookupEntry(_dependencyProperty.GlobalIndex),
_dependencyProperty,
null,
RequestFlags.RawEntry);
EffectiveValueEntry newEntry;
object value;
// create a copy of that entry, removing animated & coerced values
if (!oldEntry.HasModifiers)
{
// no modifiers; just use it, removing deferred references
newEntry = oldEntry;
value = newEntry.Value;
if (newEntry.IsDeferredReference)
{
value = ((DeferredReference) value).GetValue(newEntry.BaseValueSourceInternal);
newEntry.Value = value;
}
}
else
{
// else entry has modifiers; preserve expression but throw away
// coerced & animated values, since we'll be recomputing an animated value
newEntry = new EffectiveValueEntry();
newEntry.BaseValueSourceInternal = oldEntry.BaseValueSourceInternal;
newEntry.PropertyIndex = oldEntry.PropertyIndex;
newEntry.HasExpressionMarker = oldEntry.HasExpressionMarker;
value = oldEntry.ModifiedValue.BaseValue;
if (oldEntry.IsDeferredReference)
{
DeferredReference dr = value as DeferredReference;
if (dr != null)
{
value = dr.GetValue(newEntry.BaseValueSourceInternal);
}
}
newEntry.Value = value;
if (oldEntry.IsExpression)
{
value = oldEntry.ModifiedValue.ExpressionValue;
if (oldEntry.IsDeferredReference)
{
DeferredReference dr = value as DeferredReference;
if (dr != null)
{
value = dr.GetValue(newEntry.BaseValueSourceInternal);
}
}
newEntry.SetExpressionValue(value, newEntry.Value);
}
}
// compute the new value for the property
PropertyMetadata metadata = _dependencyProperty.GetMetadata(targetDO.DependencyObjectType);
object animatedValue = AnimationStorage.GetCurrentPropertyValue(this, targetDO, _dependencyProperty, metadata, value);
if (_dependencyProperty.IsValidValueInternal(animatedValue))
{
// update the new entry to contain the new animated value
newEntry.SetAnimatedValue(animatedValue, value);
// call UpdateEffectiveValue to put the new entry in targetDO's effective values table
targetDO.UpdateEffectiveValue(
targetDO.LookupEntry(_dependencyProperty.GlobalIndex),
_dependencyProperty,
metadata,
oldEntry,
ref newEntry,
false /* coerceWithDeferredReference */,
false /* coerceWithCurrentValue */,
OperationType.Unknown);
if (_hadValidationError)
{
if (TraceAnimation.IsEnabled)
{
TraceAnimation.TraceActivityItem(
TraceAnimation.AnimateStorageValidationNoLongerFailing,
this,
animatedValue,
target,
_dependencyProperty);
_hadValidationError = false;
}
}
}
else if(!_hadValidationError)
{
if (TraceAnimation.IsEnabled)
{
TraceAnimation.TraceActivityItem(
TraceAnimation.AnimateStorageValidationFailed,
this,
animatedValue,
target,
_dependencyProperty);
}
_hadValidationError = true;
}
}
catch (Exception e)
{
// Catch all exceptions thrown during the InvalidateProperty callstack
// and wrap them in an AnimationException
throw new AnimationException(
(AnimationClock)sender,
_dependencyProperty,
(IAnimatable)target,
SR.Get(
SRID.Animation_Exception,
_dependencyProperty.Name,
target.GetType().FullName,
((AnimationClock)sender).Timeline.GetType().FullName),
e);
}
}
}
private void OnCurrentTimeInvalidated(object sender, EventArgs args)
{
object target = _dependencyObject.Target;
if (target == null)
{
// If the target has been garbage collected, remove this handler
// from the AnimationClock so that this collection can be
// released also.
DetachAnimationClock((AnimationClock)sender, _removeRequestedHandler);
}
else
{
// recompute animated value
try
{
DependencyObject targetDO = ((DependencyObject)target);
// fetch the existing entry
EffectiveValueEntry oldEntry = targetDO.GetValueEntry(
targetDO.LookupEntry(_dependencyProperty.GlobalIndex),
_dependencyProperty,
null,
RequestFlags.RawEntry);
EffectiveValueEntry newEntry;
object value;
// create a copy of that entry, removing animated & coerced values
if (!oldEntry.HasModifiers)
{
// no modifiers; just use it, removing deferred references
newEntry = oldEntry;
value = newEntry.Value;
if (newEntry.IsDeferredReference)
{
value = ((DeferredReference)value).GetValue(newEntry.BaseValueSourceInternal);
newEntry.Value = value;
}
}
else
{
// else entry has modifiers; preserve expression but throw away
// coerced & animated values, since we'll be recomputing an animated value
newEntry = new EffectiveValueEntry();
newEntry.BaseValueSourceInternal = oldEntry.BaseValueSourceInternal;
newEntry.PropertyIndex = oldEntry.PropertyIndex;
newEntry.HasExpressionMarker = oldEntry.HasExpressionMarker;
value = oldEntry.ModifiedValue.BaseValue;
if (oldEntry.IsDeferredReference)
{
DeferredReference dr = value as DeferredReference;
if (dr != null)
{
value = dr.GetValue(newEntry.BaseValueSourceInternal);
}
}
newEntry.Value = value;
if (oldEntry.IsExpression)
{
value = oldEntry.ModifiedValue.ExpressionValue;
if (oldEntry.IsDeferredReference)
{
DeferredReference dr = value as DeferredReference;
if (dr != null)
{
value = dr.GetValue(newEntry.BaseValueSourceInternal);
}
}
newEntry.SetExpressionValue(value, newEntry.Value);
}
}
// compute the new value for the property
PropertyMetadata metadata = _dependencyProperty.GetMetadata(targetDO.DependencyObjectType);
object animatedValue = AnimationStorage.GetCurrentPropertyValue(this, targetDO, _dependencyProperty, metadata, value);
if (_dependencyProperty.IsValidValueInternal(animatedValue))
{
// update the new entry to contain the new animated value
newEntry.SetAnimatedValue(animatedValue, value);
// call UpdateEffectiveValue to put the new entry in targetDO's effective values table
targetDO.UpdateEffectiveValue(
targetDO.LookupEntry(_dependencyProperty.GlobalIndex),
_dependencyProperty,
metadata,
oldEntry,
ref newEntry,
false /* coerceWithDeferredReference */,
false /* coerceWithCurrentValue */,
OperationType.Unknown);
if (_hadValidationError)
{
if (TraceAnimation.IsEnabled)
{
TraceAnimation.TraceActivityItem(
TraceAnimation.AnimateStorageValidationNoLongerFailing,
this,
animatedValue,
target,
_dependencyProperty);
_hadValidationError = false;
}
}
}
else if (!_hadValidationError)
{
if (TraceAnimation.IsEnabled)
{
TraceAnimation.TraceActivityItem(
TraceAnimation.AnimateStorageValidationFailed,
this,
animatedValue,
target,
_dependencyProperty);
}
_hadValidationError = true;
}
}
catch (Exception e)
{
// Catch all exceptions thrown during the InvalidateProperty callstack
// and wrap them in an AnimationException
throw new AnimationException(
(AnimationClock)sender,
_dependencyProperty,
(IAnimatable)target,
SR.Get(
SRID.Animation_Exception,
_dependencyProperty.Name,
target.GetType().FullName,
((AnimationClock)sender).Timeline.GetType().FullName),
e);
}
}
}
