1#!/opt/bin/lv_micropython -i
2import lvgl as lv
3import display_driver
4def set_value(bar, v):
5    bar.set_value(v, lv.ANIM.OFF)
6
7def event_cb(e):
8    dsc = lv.obj_draw_part_dsc_t.__cast__(e.get_param())
9    if dsc.part != lv.PART.INDICATOR:
10        return
11
12    obj= e.get_target()
13
14    label_dsc = lv.draw_label_dsc_t()
15    label_dsc.init()
16    # label_dsc.font = LV_FONT_DEFAULT;
17
18    value_txt = str(obj.get_value())
19    txt_size = lv.point_t()
20    lv.txt_get_size(txt_size, value_txt, label_dsc.font, label_dsc.letter_space, label_dsc.line_space, lv.COORD.MAX, label_dsc.flag)
21
22    txt_area = lv.area_t()
23    # If the indicator is long enough put the text inside on the right
24    if dsc.draw_area.get_width() > txt_size.x + 20:
25        txt_area.x2 = dsc.draw_area.x2 - 5
26        txt_area.x1 = txt_area.x2 - txt_size.x + 1
27        label_dsc.color = lv.color_white()
28    # If the indicator is still short put the text out of it on the right*/
29    else:
30        txt_area.x1 = dsc.draw_area.x2 + 5
31        txt_area.x2 = txt_area.x1 + txt_size.x - 1
32        label_dsc.color = lv.color_black()
33
34    txt_area.y1 = dsc.draw_area.y1 + (dsc.draw_area.get_height() - txt_size.y) // 2
35    txt_area.y2 = txt_area.y1 + txt_size.y - 1
36
37    dsc.draw_ctx.label(label_dsc, txt_area, value_txt, None)
38
39#
40# Custom drawer on the bar to display the current value
41#
42
43bar = lv.bar(lv.scr_act())
44bar.add_event_cb(event_cb, lv.EVENT.DRAW_PART_END, None)
45bar.set_size(200, 20)
46bar.center()
47
48a = lv.anim_t()
49a.init()
50a.set_var(bar)
51a.set_values(0, 100)
52a.set_custom_exec_cb(lambda a,val: set_value(bar,val))
53a.set_time(2000)
54a.set_playback_time(2000)
55a.set_repeat_count(lv.ANIM_REPEAT.INFINITE)
56lv.anim_t.start(a)
57
58