PointerManipulators have a list of activation filters.
| CanStartManipulation | Checks whether PointerEvent satisfies all of the ManipulatorActivationFilter requirements. |
| CanStopManipulation | Checks whether the PointerEvent is related to this Manipulator. |
| target | VisualElement being manipulated. |
| activators | List of Activationfilters. |
| RegisterCallbacksOnTarget | Called to register event callbacks on the target element. |
| UnregisterCallbacksFromTarget | Called to unregister event callbacks from the target element. |
| CanStartManipulation | Checks whether MouseEvent satisfies all of the ManipulatorActivationFilter requirements. |
| CanStopManipulation | Checks whether the MouseEvent is related to this Manipulator. |