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 | 被操作的 VisualElement。 |
| activators | Activationfilters 列表。 |
| RegisterCallbacksOnTarget | 调用来在目标元素上注册事件回调。 |
| UnregisterCallbacksFromTarget | 调用以从目标元素取消注册单击事件回调。 |
| CanStartManipulation | Checks whether MouseEvent satisfies all of the ManipulatorActivationFilter requirements. |
| CanStopManipulation | Checks whether the MouseEvent is related to this Manipulator. |