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53 lines
1.8 KiB
Python
53 lines
1.8 KiB
Python
2 years ago
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def draw_event_cb(e):
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dsc = lv.obj_draw_part_dsc_t.__cast__(e.get_param())
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if dsc.part == lv.PART.TICKS and dsc.id == lv.chart.AXIS.PRIMARY_X:
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month = ["Jan", "Febr", "March", "Apr", "May", "Jun", "July", "Aug", "Sept", "Oct", "Nov", "Dec"]
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# dsc.text is defined char text[16], I must therefore convert the Python string to a byte_array
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dsc.text = bytes(month[dsc.value],"ascii")
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#
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# Add ticks and labels to the axis and demonstrate scrolling
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#
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# Create a chart
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chart = lv.chart(lv.scr_act())
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chart.set_size(200, 150)
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chart.center()
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chart.set_type(lv.chart.TYPE.BAR)
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chart.set_range(lv.chart.AXIS.PRIMARY_Y, 0, 100)
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chart.set_range(lv.chart.AXIS.SECONDARY_Y, 0, 400)
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chart.set_point_count(12)
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chart.add_event_cb(draw_event_cb, lv.EVENT.DRAW_PART_BEGIN, None)
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# Add ticks and label to every axis
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chart.set_axis_tick(lv.chart.AXIS.PRIMARY_X, 10, 5, 12, 3, True, 40)
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chart.set_axis_tick(lv.chart.AXIS.PRIMARY_Y, 10, 5, 6, 2, True, 50)
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chart.set_axis_tick(lv.chart.AXIS.SECONDARY_Y, 10, 5, 3, 4,True, 50)
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# Zoom in a little in X
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chart.set_zoom_x(800)
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# Add two data series
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ser1 = lv.chart.add_series(chart, lv.palette_lighten(lv.PALETTE.GREEN, 2), lv.chart.AXIS.PRIMARY_Y)
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ser2 = lv.chart.add_series(chart, lv.palette_darken(lv.PALETTE.GREEN, 2), lv.chart.AXIS.SECONDARY_Y)
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# Set the next points on 'ser1'
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chart.set_next_value(ser1, 31)
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chart.set_next_value(ser1, 66)
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chart.set_next_value(ser1, 10)
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chart.set_next_value(ser1, 89)
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chart.set_next_value(ser1, 63)
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chart.set_next_value(ser1, 56)
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chart.set_next_value(ser1, 32)
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chart.set_next_value(ser1, 35)
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chart.set_next_value(ser1, 57)
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chart.set_next_value(ser1, 85)
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chart.set_next_value(ser1, 22)
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chart.set_next_value(ser1, 58)
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# Directly set points on 'ser2'
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ser2.y_points = [92,71,61,15,21,35,35,58,31,53,33,73]
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chart.refresh() # Required after direct set
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