Bug #2039 ยป WSortFilterProxyModel-bugfix.patch
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WModelIndex parent = mapFromSource(topLeft.parent());
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Item *item = itemFromIndex(parent);
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bool isNotRootIndex = topLeft.parent().isValid();
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if (item == mappedRootItem_ && isNotRootIndex)
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{
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// index doesn't refer to root item, hence simply invalid/not meant to be displayed
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return;
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}
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for (int row = topLeft.row(); row <= bottomRight.row(); ++row) {
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int oldMappedRow = item->sourceRowMap_[row];
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