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from __future__ import absolute_import |
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from qtpy import QtGui, QtWidgets |
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def get_qapp(icon_path=None): |
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qapp = QtWidgets.QApplication.instance() |
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if qapp is None: |
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qapp = QtWidgets.QApplication(['']) |
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return qapp |
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class Data(object): |
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""" |
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Test class to store in userData. The __getitem__ is needed in order to |
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reproduce the segmentation fault. |
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""" |
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def __getitem__(self, item): |
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raise ValueError("Failing") |
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def test_patched_qcombobox(): |
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""" |
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In PySide, using Python objects as userData in QComboBox causes |
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Segmentation faults under certain conditions. Even in cases where it |
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doesn't, findData does not work correctly. Likewise, findData also |
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does not work correctly with Python objects when using PyQt4. On the |
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other hand, PyQt5 deals with this case correctly. We therefore patch |
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QComboBox when using PyQt4 and PySide to avoid issues. |
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""" |
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app = get_qapp() |
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data1 = Data() |
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data2 = Data() |
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data3 = Data() |
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data4 = Data() |
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data5 = Data() |
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data6 = Data() |
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icon1 = QtGui.QIcon() |
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icon2 = QtGui.QIcon() |
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widget = QtWidgets.QComboBox() |
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widget.addItem('a', data1) |
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widget.insertItem(0, 'b', data2) |
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widget.addItem('c', data1) |
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widget.setItemData(2, data3) |
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widget.addItem(icon1, 'd', data4) |
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widget.insertItem(3, icon2, 'e', data5) |
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widget.addItem(icon1, 'f') |
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widget.insertItem(5, icon2, 'g') |
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widget.show() |
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assert widget.findData(data1) == 1 |
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assert widget.findData(data2) == 0 |
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assert widget.findData(data3) == 2 |
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assert widget.findData(data4) == 4 |
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assert widget.findData(data5) == 3 |
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assert widget.findData(data6) == -1 |
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assert widget.itemData(0) == data2 |
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assert widget.itemData(1) == data1 |
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assert widget.itemData(2) == data3 |
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assert widget.itemData(3) == data5 |
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assert widget.itemData(4) == data4 |
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assert widget.itemData(5) is None |
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assert widget.itemData(6) is None |
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assert widget.itemText(0) == 'b' |
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assert widget.itemText(1) == 'a' |
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assert widget.itemText(2) == 'c' |
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assert widget.itemText(3) == 'e' |
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assert widget.itemText(4) == 'd' |
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assert widget.itemText(5) == 'g' |
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assert widget.itemText(6) == 'f' |
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80
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def test_model_item(): |
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""" |
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This is a regression test for an issue that caused the call to item(0) |
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below to trigger segmentation faults in PySide. The issue is |
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non-deterministic when running the call once, so we include a loop to make |
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sure that we trigger the fault. |
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""" |
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app = get_qapp() |
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combo = QtWidgets.QComboBox() |
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label_data = [('a', None)] |
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for iter in range(10000): |
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combo.clear() |
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for i, (label, data) in enumerate(label_data): |
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combo.addItem(label, userData=data) |
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model = combo.model() |
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model.item(0) |
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spyder-ide /
qtpy
