Fires when a manipulator element is selected.
| Name | Type | Description |
| SelectedManipulatorElement | ManipulatorElementEnum | The ManipulatorElementEnum that indicates the selected manipulator element. |
| BeforeOrAfter | EventTimingEnum | Input EventTimingEnum indicating if the event is being fired before (kBefore) or after (kAfter) the manipulator element selection is changed. |
| Context | NameValueMap | Input NameValueMap object that can be used to determine the context of why the event fired. |
| HandlingCode | HandlingCodeEnum | Output HandlingCodeEnum that indicates how you are handling the event. The value of this argument is currently ignored for this event. |