Does lv_obj_clean delete objects immediately?

How-to
1

Description

I know lv_obj_clean deletes an object’s children. But does it happen immediately, like lv_obj_del, or defer for a while like lv_obj_del_async?

For example, if I have a screen with a button in it. Is it legal to use lv_obj_clean in this button’s click callback to clear the screen?

What MCU/Processor/Board and compiler are you using?

ESP32, esp-idf. it doesn’t matter.

What LVGL version are you using?

8.2.0

What do you want to achieve?

I hope it’s legal to do that.

What have you tried so far?

I’ve actually done that and it seems to work fine. But I’m still a little worried.

Code to reproduce

lv_obj_t* screen;
lv_obj_t* button;

void callback(lv_event_t* e) {
    lv_obj_clean(screen);
}

void example() {
    screen = lv_obj_create(NULL);
    button = lv_btn_create(screen);
    lv_obj_add_event_cb(button, callback, LV_EVENT_CLICKED, NULL);
}