1def event_handler(e):
2    code = e.get_code()
3    obj = e.get_target()
4    if code == lv.EVENT.VALUE_CHANGED:
5        if obj.has_state(lv.STATE.CHECKED):
6            print("State: on")
7        else:
8            print("State: off")
9
10
11lv.scr_act().set_flex_flow(lv.FLEX_FLOW.COLUMN)
12lv.scr_act().set_flex_align(lv.FLEX_ALIGN.CENTER, lv.FLEX_ALIGN.CENTER, lv.FLEX_ALIGN.CENTER)
13
14sw = lv.switch(lv.scr_act())
15sw.add_event_cb(event_handler,lv.EVENT.ALL, None)
16
17sw = lv.switch(lv.scr_act())
18sw.add_state(lv.STATE.CHECKED)
19sw.add_event_cb(event_handler, lv.EVENT.ALL, None)
20
21sw = lv.switch(lv.scr_act())
22sw.add_state(lv.STATE.DISABLED)
23sw.add_event_cb(event_handler, lv.EVENT.ALL, None)
24
25sw = lv.switch(lv.scr_act())
26sw.add_state(lv.STATE.CHECKED | lv.STATE.DISABLED)
27sw.add_event_cb(event_handler, lv.EVENT.ALL, None)
28
29