Type Alias lv_buttonmatrix_button_draw_cb_t

pub type lv_buttonmatrix_button_draw_cb_t = Option<unsafe extern "C" fn(*mut _lv_obj_t, u32, *const lv_area_t, *const lv_area_t) -> bool>;

Aliased Type

pub enum lv_buttonmatrix_button_draw_cb_t {
    None,
    Some(unsafe extern "C" fn(*mut _lv_obj_t, u32, *const lv_area_t, *const lv_area_t) -> bool),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut _lv_obj_t, u32, *const lv_area_t, *const lv_area_t) -> bool)

Some value of type T.