Function test_range_slider

lib/matplotlib/tests/test_widgets.py:1339–1380

(orientation)

@pytest.mark.parametrize("orientation", ["horizontal", "vertical"])
def test_range_slider(orientation):
    if orientation == "vertical":
        idx = [1, 0, 3, 2]
    else:
        idx = [0, 1, 2, 3]

    fig, ax = plt.subplots()

    slider = widgets.RangeSlider(
        ax=ax, label="", valmin=0.0, valmax=1.0, orientation=orientation,
        valinit=[0.1, 0.34]
    )
    box = slider.poly.get_extents().transformed(ax.transAxes.inverted())
    assert_allclose(box.get_points().flatten()[idx], [0.1, 0.25, 0.34, 0.75])

    # Check initial value is set correctly
    assert_allclose(slider.val, (0.1, 0.34))

    def handle_positions(slider):
        if orientation == "vertical":
            return [h.get_ydata()[0] for h in slider._handles]
        else:
            return [h.get_xdata()[0] for h in slider._handles]

    slider.set_val((0.4, 0.6))
    assert_allclose(slider.val, (0.4, 0.6))
    assert_allclose(handle_positions(slider), (0.4, 0.6))

    box = slider.poly.get_extents().transformed(ax.transAxes.inverted())
    assert_allclose(box.get_points().flatten()[idx], [0.4, .25, 0.6, .75])

    slider.set_val((0.2, 0.1))
    assert_allclose(slider.val, (0.1, 0.2))
    assert_allclose(handle_positions(slider), (0.1, 0.2))

    slider.set_val((-1, 10))
    assert_allclose(slider.val, (0, 1))
    assert_allclose(handle_positions(slider), (0, 1))

    slider.reset()
    assert_allclose(slider.val, (0.1, 0.34))
    assert_allclose(handle_positions(slider), (0.1, 0.34))


@pytest.mark.parametrize("orientation", ["horizontal", "vertical"])