private void SetAnimationClocks(
IList <AnimationClock> animationClocks)
{
Debug.Assert(animationClocks != null);
Debug.Assert(animationClocks.Count > 0);
Debug.Assert(!animationClocks.Contains(null));
Debug.Assert(_animationClocks == null);
_animationClocks = animationClocks;
int count = animationClocks.Count;
for (int i = 0; i < count; i++)
{
_ownerStorage.AttachAnimationClock(animationClocks[i], _removeRequestedHandler);
}
}
[FriendAccessAllowed] // Built into Core, also used by Framework.
internal static void ApplyAnimationClocks(
DependencyObject d,
DependencyProperty dp,
IList <AnimationClock> animationClocks,
HandoffBehavior handoffBehavior)
{
Debug.Assert(animationClocks != null,
"The animationClocks parameter should not be passed in as null.");
Debug.Assert(animationClocks.Count > 0,
"The animationClocks parameter should contain at least one clock.");
Debug.Assert(!animationClocks.Contains(null),
"The animationClocks parameter should not contain a null entry.");
Debug.Assert(HandoffBehaviorEnum.IsDefined(handoffBehavior),
"Public API caller of this internal method is responsible for validating that the HandoffBehavior value is valid.");
AnimationStorage storage = GetStorage(d, dp);
// handoffBehavior is SnapshotAndReplace or the situation is such
// that it is the equivalent because we have nothing to compose
// with.
if (handoffBehavior == HandoffBehavior.SnapshotAndReplace ||
storage == null ||
storage._animationClocks == null)
{
if (storage != null)
{
EventHandler handler = new EventHandler(storage.OnCurrentStateInvalidated);
// If we have a sticky snapshot value, the clock that would have
// unstuck it is being replaced, so we need to remove our event
// handler from that clock.
if (storage._hasStickySnapshotValue)
{
storage._animationClocks[0].CurrentStateInvalidated -= handler;
}
// Calculate a snapshot value if we don't already have one
// since the last tick.
else
{
storage._snapshotValue = d.GetValue(dp);
}
// If we have a new clock in a stopped state, then the snapshot
// value will be sticky.
if (animationClocks[0].CurrentState == ClockState.Stopped)
{
storage._hasStickySnapshotValue = true;
animationClocks[0].CurrentStateInvalidated += new EventHandler(storage.OnCurrentStateInvalidated);
}
// Otherwise it won't be sticky.
else
{
storage._hasStickySnapshotValue = false;
}
storage.ClearAnimations();
}
else
{
storage = CreateStorage(d, dp);
}
// Add and attach new animation.
storage._animationClocks = new FrugalObjectList <AnimationClock>(animationClocks.Count);
for (int i = 0; i < animationClocks.Count; i++)
{
Debug.Assert(animationClocks[i] != null);
storage._animationClocks.Add(animationClocks[i]);
storage.AttachAnimationClock(animationClocks[i], storage._removeRequestedHandler);
}
}
else
{
Debug.Assert(handoffBehavior == HandoffBehavior.Compose);
Debug.Assert(storage != null);
Debug.Assert(storage._animationClocks != null);
FrugalObjectList <AnimationClock> newClockCollection = new FrugalObjectList <AnimationClock>(storage._animationClocks.Count + animationClocks.Count);
for (int i = 0; i < storage._animationClocks.Count; i++)
{
newClockCollection.Add(storage._animationClocks[i]);
}
storage._animationClocks = newClockCollection;
for (int i = 0; i < animationClocks.Count; i++)
{
newClockCollection.Add(animationClocks[i]);
storage.AttachAnimationClock(animationClocks[i], storage._removeRequestedHandler);
}
}
storage.WritePostscript();
}
