arkui_sys::ui_input_event

Function OH_ArkUI_PointerEvent_GetHistoryPointerId

Source 
pub unsafe extern "C" fn OH_ArkUI_PointerEvent_GetHistoryPointerId(
    event: *const ArkUI_UIInputEvent,
    pointerIndex: u32,
    historyIndex: u32,
) -> i32
Available on crate feature api-12 only.
Expand description

Obtains the ID of a touch point in a specific historical event from a directional input event (such as a touch event, mouse event, or axis event).

§Arguments

  • event - Indicates the pointer to the current UI input event.

  • pointerIndex - Indicates the index of the target touch point in the multi-touch data list.

  • historyIndex - Indicates the index of the target historical event.

§Returns

  • Returns the ID of the corresponding touch point in the specified historical event.

Available since API-level: 12