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QTreeView item containing QProgressBar (or QProgressBar itself) is not painted with "correct" background color - like cells/items beside it. So, the whole row is not visually perceived in coherent ...
OS: [e.g. Win 10] Python [e.g. 3.6.4 X64] PyQt5 [e.g. 5.10.1] 调用QSortFilterProxyModel实例的.maptoSource() 或者 .hasChildren() 都会崩溃 . 后来测试 ...