1def event_cb(e):
2
3    # The original target of the event. Can be the buttons or the container
4    target = e.get_target()
5    # print(type(target))
6
7    # If container was clicked do nothing
8    if type(target) != type(lv.btn()):
9        return
10
11    # Make the clicked buttons red
12    target.set_style_bg_color(lv.palette_main(lv.PALETTE.RED), 0)
13
14#
15# Demonstrate event bubbling
16#
17
18cont = lv.obj(lv.scr_act())
19cont.set_size(320, 200)
20cont.center()
21cont.set_flex_flow(lv.FLEX_FLOW.ROW_WRAP)
22
23for i in range(30):
24    btn = lv.btn(cont)
25    btn.set_size(80, 50)
26    btn.add_flag(lv.obj.FLAG.EVENT_BUBBLE)
27
28    label = lv.label(btn)
29    label.set_text(str(i))
30    label.center()
31
32cont.add_event_cb(event_cb, lv.EVENT.CLICKED, None)
33