44 lines
1.5 KiB
Python
44 lines
1.5 KiB
Python
def slider_event_cb(e):
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code = e.get_code()
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obj = e.get_target()
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# Provide some extra space for the value
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if code == lv.EVENT.REFR_EXT_DRAW_SIZE:
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e.set_ext_draw_size(50)
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elif code == lv.EVENT.DRAW_PART_END:
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# print("DRAW_PART_END")
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dsc = lv.obj_draw_part_dsc_t.__cast__(e.get_param())
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# print(dsc)
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if dsc.part == lv.PART.INDICATOR:
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label_text = "{:d} - {:d}".format(obj.get_left_value(),slider.get_value())
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label_size = lv.point_t()
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lv.txt_get_size(label_size, label_text, lv.font_default(), 0, 0, lv.COORD.MAX, 0)
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# print(label_size.x,label_size.y)
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label_area = lv.area_t()
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label_area.x1 = dsc.draw_area.x1 + dsc.draw_area.get_width() // 2 - label_size.x // 2
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label_area.x2 = label_area.x1 + label_size.x
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label_area.y2 = dsc.draw_area.y1 - 10
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label_area.y1 = label_area.y2 - label_size.y
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label_draw_dsc = lv.draw_label_dsc_t()
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label_draw_dsc.init()
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dsc.draw_ctx.label(label_draw_dsc, label_area, label_text, None)
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#
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# Show the current value when the slider if pressed by extending the drawer
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#
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#
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#Create a slider in the center of the display
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slider = lv.slider(lv.scr_act())
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slider.center()
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slider.set_mode(lv.slider.MODE.RANGE)
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slider.set_value(70, lv.ANIM.OFF)
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slider.set_left_value(20, lv.ANIM.OFF)
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slider.add_event_cb(slider_event_cb, lv.EVENT.ALL, None)
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slider.refresh_ext_draw_size()
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