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Data displayed in the graph disappear if reverse is set to True at a LinearScale #1483

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SergioLoaiza opened this issue Mar 11, 2022 · 0 comments

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@SergioLoaiza
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Describe the bug
Data displayed in a simple bars graph disappear if reverse is set to True at a LinearScale.

To Reproduce

from bqplot import OrdinalScale, Bars, LinearScale

quintes = np.array(
    ["0 - 4", "5 - 9", "10 - 14", "15 - 19", "20 - 24", "25 - 29", "30 - 34", "35 - 39",
     "40 - 44", "45 - 49", "50 - 54", "55 - 59", "60 - 64", "65 - 69", "70 - 74",
     "75 - 79", "80 - 84", "85 - 89", "90 - 94", "95 - 99", "> 100"])

men = np.array(
    [1915887, 2100931, 2494484, 2464805, 2361297, 2529633, 2669927, 2754129, 2753282,
     2552531, 2211649, 1697221, 1311024, 902675, 722246, 482686, 273915, 108639, 35867,
     10965, 1238])

x_ord = OrdinalScale()
y_linear = LinearScale()

bars = Bars(x=quintes, y=men,
           scales={'x':x_ord, 'y': y_linear},
           orientation="horizontal",
           colors=["deepskyblue"]
           )

# bars.scales['y'].reverse=True

ax_x = Axis(scale=x_ord, orientation = 'vertical', visible=False)

ax_y = Axis(scale=y_linear, tick_format="0.0f")

fig = Figure(marks=[bars], axes=[ax_x, ax_y])

fig

The bars graph is displayed. However, after uncommenting this line in the code:

bars.scales['y'].reverse=True

the bars disappear even though the axes is effectively reversed.

Expected behavior
The bars should be displayed in the same way of the axes, that is, from right to left.

Environment (please complete the following information):
Ubuntu 21.04
Python 3.9.5
JupyterLab 3.2.4
bqplot 0.12.32

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