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11 The user can assign callback functions to an object to see its events. In practice, it looks like t…
24 `LV_EVENT_ALL` can be used to receive all events.
28 More events can be added to an object, like this:
35 Even the same event callback can be used on an object with different `user_data`. For example:
44 Other objects can use the same *event callback*.
49 Events can be removed from an object with the `lv_obj_remove_event_cb(obj, event_cb)` function or `…
53 The event codes can be grouped into these categories:
77 …eter is `NULL` or an `lv_anim_t *` with a scroll animation descriptor that can be modified if requ…
85 …t_test_info_t * a = lv_event_get_hit_test_info(e)` and check if `a->point` can click the object or…
100 In `LV_EVENT_DRAW_...` events it's not allowed to adjust the widgets' properties. E.g. you can not …
101 In other words only `get` functions can be called.
126 Any custom event codes can be registered by `uint32_t MY_EVENT_1 = lv_event_register_id();`
128 They can be sent to any object with `lv_event_send(obj, MY_EVENT_1, &some_data)`
134 For example, this can be used to manually close a message box by simulating a button press (althoug…
151 …vent callback and it contains all data about the event. The following values can be gotten from it: