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- #!/opt/bin/lv_micropython -i
- import lvgl as lv
- import display_driver
- def set_value(bar, v):
- bar.set_value(v, lv.ANIM.OFF)
- def event_cb(e):
- dsc = lv.obj_draw_part_dsc_t.__cast__(e.get_param())
- if dsc.part != lv.PART.INDICATOR:
- return
- obj= e.get_target()
- label_dsc = lv.draw_label_dsc_t()
- label_dsc.init()
- # label_dsc.font = LV_FONT_DEFAULT;
- value_txt = str(obj.get_value())
- txt_size = lv.point_t()
- 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)
- txt_area = lv.area_t()
- # If the indicator is long enough put the text inside on the right
- if dsc.draw_area.get_width() > txt_size.x + 20:
- txt_area.x2 = dsc.draw_area.x2 - 5
- txt_area.x1 = txt_area.x2 - txt_size.x + 1
- label_dsc.color = lv.color_white()
- # If the indicator is still short put the text out of it on the right*/
- else:
- txt_area.x1 = dsc.draw_area.x2 + 5
- txt_area.x2 = txt_area.x1 + txt_size.x - 1
- label_dsc.color = lv.color_black()
- txt_area.y1 = dsc.draw_area.y1 + (dsc.draw_area.get_height() - txt_size.y) // 2
- txt_area.y2 = txt_area.y1 + txt_size.y - 1
- dsc.draw_ctx.label(label_dsc, txt_area, value_txt, None)
- #
- # Custom drawer on the bar to display the current value
- #
- bar = lv.bar(lv.scr_act())
- bar.add_event_cb(event_cb, lv.EVENT.DRAW_PART_END, None)
- bar.set_size(200, 20)
- bar.center()
- a = lv.anim_t()
- a.init()
- a.set_var(bar)
- a.set_values(0, 100)
- a.set_custom_exec_cb(lambda a,val: set_value(bar,val))
- a.set_time(2000)
- a.set_playback_time(2000)
- a.set_repeat_count(lv.ANIM_REPEAT.INFINITE)
- lv.anim_t.start(a)
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