Function OH_NativeXComponent_RegisterFocusEventCallback 

pub unsafe extern "C" fn OH_NativeXComponent_RegisterFocusEventCallback(
    component: *mut OH_NativeXComponent,
    callback: Option<unsafe extern "C" fn(component: *mut OH_NativeXComponent, window: *mut c_void)>,
) -> i32

Registers a callback for this OH_NativeXComponent instance.

Arguments

• component - Indicates the pointer to this OH_NativeXComponent instance.

• callback - Indicates the pointer to a focus event callback.

Returns

• Returns the status code of the execution.

Available since API-level: 10

Version: 1.0