observer
- lv_observer.h
lv_observer_cb_t
lv_subject_type_t
lv_subject_init_int()
lv_subject_set_int()
lv_subject_get_int()
lv_subject_get_previous_int()
lv_subject_init_string()
lv_subject_copy_string()
lv_subject_snprintf()
lv_subject_get_string()
lv_subject_get_previous_string()
lv_subject_init_pointer()
lv_subject_set_pointer()
lv_subject_get_pointer()
lv_subject_get_previous_pointer()
lv_subject_init_color()
lv_subject_set_color()
lv_subject_get_color()
lv_subject_get_previous_color()
lv_subject_init_group()
lv_subject_deinit()
lv_subject_get_group_element()
lv_subject_add_observer()
lv_subject_add_observer_obj()
lv_subject_add_observer_with_target()
lv_observer_remove()
lv_obj_remove_from_subject()
lv_observer_get_target()
lv_observer_get_target_obj()
lv_observer_get_user_data()
lv_subject_notify()
lv_obj_bind_flag_if_eq()
lv_obj_bind_flag_if_not_eq()
lv_obj_bind_state_if_eq()
lv_obj_bind_state_if_not_eq()
lv_obj_bind_checked()
lv_label_bind_text()
lv_arc_bind_value()
lv_slider_bind_value()
lv_roller_bind_value()
lv_dropdown_bind_value()
lv_subject_value_t
lv_subject_t