OH_ArkUI_PointerEvent_GetRollAngle

arkui_sys::ui_input_event

Function OH_ArkUI_PointerEvent_GetRollAngle 

Source 
pub unsafe extern "C" fn OH_ArkUI_PointerEvent_GetRollAngle(
    event: *const ArkUI_UIInputEvent,
    rollAngle: *mut f64,
) -> i32
Available on crate features api-12 and api-17 only.
Expand description

Obtains the rotation angle of the stylus around the z-axis from a UI input event.

§Arguments

  • event - Pointer to the UI input event.

  • rollAngle - Rotation angle of the stylus around the z-axis.

§Returns

  • Returns the result code. Returns [ARKUI_ERROR_CODE_NO_ERROR] if the operation is successful. Returns [ARKUI_ERROR_CODE_PARAM_INVALID] if a parameter error occurs.

Available since API-level: 17