60 lines
1.6 KiB
Python
60 lines
1.6 KiB
Python
# -*- coding: utf-8 -*-
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import pytest
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import pyqtgraph as pg
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from pyqtgraph.exporters import MatplotlibExporter
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pytest.importorskip("matplotlib")
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app = pg.mkQApp()
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skip_qt6 = pytest.mark.skipif(
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pg.QT_LIB in ["PySide6", "PyQt6"],
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reason= (
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"Matplotlib has no Qt6 support yet, "
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"see https://github.com/matplotlib/matplotlib/pull/19255"
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)
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)
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@skip_qt6
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def test_MatplotlibExporter():
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plt = pg.plot()
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# curve item
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plt.plot([0, 1, 2], [0, 1, 2])
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# scatter item
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plt.plot([0, 1, 2], [1, 2, 3], pen=None, symbolBrush='r')
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# curve + scatter
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plt.plot([0, 1, 2], [2, 3, 4], pen='k', symbolBrush='r')
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exp = MatplotlibExporter(plt.getPlotItem())
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exp.export()
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@skip_qt6
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def test_MatplotlibExporter_nonplotitem():
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# attempting to export something other than a PlotItem raises an exception
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plt = pg.plot()
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plt.plot([0, 1, 2], [2, 3, 4])
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exp = MatplotlibExporter(plt.getPlotItem().getViewBox())
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with pytest.raises(Exception):
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exp.export()
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@skip_qt6
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@pytest.mark.parametrize('scale', [1e10, 1e-9])
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def test_MatplotlibExporter_siscale(scale):
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# coarse test to verify that plot data is scaled before export when
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# autoSIPrefix is in effect (so mpl doesn't add its own multiplier label)
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plt = pg.plot([0, 1, 2], [(i+1)*scale for i in range(3)])
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# set the label so autoSIPrefix works
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plt.setLabel('left', 'magnitude')
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exp = MatplotlibExporter(plt.getPlotItem())
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exp.export()
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mpw = MatplotlibExporter.windows[-1]
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fig = mpw.getFigure()
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ymin, ymax = fig.axes[0].get_ylim()
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if scale < 1:
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assert ymax > scale
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else:
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assert ymax < scale
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