diff options
author | Friedemann Kleint <Friedemann.Kleint@theqtcompany.com> | 2015-06-10 16:46:54 +0200 |
---|---|---|
committer | Friedemann Kleint <Friedemann.Kleint@theqtcompany.com> | 2015-06-11 13:29:23 +0000 |
commit | 56d62345ad34b8efb6a72a3c189542eb295ac2b9 (patch) | |
tree | aaa002324fcbe36f13823e46be09135be125a4ff | |
parent | 05dcc0499bfae43b8ae4100ab71902a13dd40f74 (diff) |
Fix less-than comparison for QStandardItem and QSortFilterProxyModel with invalid data.
Previously, QStandardItem::operator<() returned true when both
items had invalid data. With MSVC in debug mode (checked
iterators/STL), this triggered an assert in
tst_QStandardItem::sortChildren() since that verifies
that !(b < a) when a < b:
Debug Assertion Failed!
Line: 3006
Expression: invalid operator<
Introduce a stable sort order for invalid items such that
other items are always less than invalid items and comparing
invalid items returns false (indicating equivalence).
Change-Id: Ica0f0d9f001c86973b1941dbcc1faf282e4c47df
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
4 files changed, 30 insertions, 10 deletions
diff --git a/src/corelib/itemmodels/qsortfilterproxymodel.cpp b/src/corelib/itemmodels/qsortfilterproxymodel.cpp index 922d0f1622..38f8dfa788 100644 --- a/src/corelib/itemmodels/qsortfilterproxymodel.cpp +++ b/src/corelib/itemmodels/qsortfilterproxymodel.cpp @@ -2617,9 +2617,12 @@ bool QSortFilterProxyModel::lessThan(const QModelIndex &source_left, const QMode Q_D(const QSortFilterProxyModel); QVariant l = (source_left.model() ? source_left.model()->data(source_left, d->sort_role) : QVariant()); QVariant r = (source_right.model() ? source_right.model()->data(source_right, d->sort_role) : QVariant()); + // Duplicated in QStandardItem::operator<() + if (l.userType() == QVariant::Invalid) + return false; + if (r.userType() == QVariant::Invalid) + return true; switch (l.userType()) { - case QVariant::Invalid: - return (r.type() != QVariant::Invalid); case QVariant::Int: return l.toInt() < r.toInt(); case QVariant::UInt: diff --git a/src/gui/itemmodels/qstandarditemmodel.cpp b/src/gui/itemmodels/qstandarditemmodel.cpp index ed2479302e..8d848b662f 100644 --- a/src/gui/itemmodels/qstandarditemmodel.cpp +++ b/src/gui/itemmodels/qstandarditemmodel.cpp @@ -1811,9 +1811,11 @@ bool QStandardItem::operator<(const QStandardItem &other) const const int role = model() ? model()->sortRole() : Qt::DisplayRole; const QVariant l = data(role), r = other.data(role); // this code is copied from QSortFilterProxyModel::lessThan() + if (l.userType() == QVariant::Invalid) + return false; + if (r.userType() == QVariant::Invalid) + return true; switch (l.userType()) { - case QVariant::Invalid: - return (r.type() == QVariant::Invalid); case QVariant::Int: return l.toInt() < r.toInt(); case QVariant::UInt: diff --git a/tests/auto/corelib/itemmodels/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp b/tests/auto/corelib/itemmodels/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp index 01c10886c5..1c30adc8de 100644 --- a/tests/auto/corelib/itemmodels/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp +++ b/tests/auto/corelib/itemmodels/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp @@ -2502,16 +2502,16 @@ void tst_QSortFilterProxyModel::sortColumnTracking2() proxyModel.sort(0); QCOMPARE(proxyModel.sortColumn(), 0); - QList<QStandardItem *> items; - QStringList strings; - strings << "foo" << "bar" << "some" << "others" << "item" << "aa" << "zz"; - foreach (QString s, strings) - items << new QStandardItem(s); + QList<QStandardItem *> items; // Stable sorting: Items with invalid data should move to the end + items << new QStandardItem << new QStandardItem("foo") << new QStandardItem("bar") + << new QStandardItem("some") << new QStandardItem("others") << new QStandardItem("item") + << new QStandardItem("aa") << new QStandardItem("zz") << new QStandardItem; model.insertColumn(0,items); QCOMPARE(proxyModel.sortColumn(), 0); QCOMPARE(proxyModel.data(proxyModel.index(0,0)).toString(),QString::fromLatin1("aa")); - QCOMPARE(proxyModel.data(proxyModel.index(strings.count()-1,0)).toString(),QString::fromLatin1("zz")); + const int zzIndex = items.count() - 3; // 2 invalid at end. + QCOMPARE(proxyModel.data(proxyModel.index(zzIndex,0)).toString(),QString::fromLatin1("zz")); } void tst_QSortFilterProxyModel::sortStable() diff --git a/tests/auto/gui/itemmodels/qstandarditem/tst_qstandarditem.cpp b/tests/auto/gui/itemmodels/qstandarditem/tst_qstandarditem.cpp index 5dce228ca0..2448b89296 100644 --- a/tests/auto/gui/itemmodels/qstandarditem/tst_qstandarditem.cpp +++ b/tests/auto/gui/itemmodels/qstandarditem/tst_qstandarditem.cpp @@ -81,6 +81,7 @@ private slots: void clone(); void sortChildren(); void subclassing(); + void lessThan(); }; tst_QStandardItem::tst_QStandardItem() @@ -1095,5 +1096,19 @@ void tst_QStandardItem::subclassing() QCOMPARE(item->child(2), (QStandardItem*)child1); } +void tst_QStandardItem::lessThan() +{ + QStandardItem stringA("A"); + QStandardItem stringB("B"); + QStandardItem invalid1; + QStandardItem invalid2; + QVERIFY(stringA < stringB); + QVERIFY(!(stringB < stringA)); + // Items with invalid data go to the end. + QVERIFY(stringA < invalid1); + QVERIFY(!(invalid1 < stringA)); + QVERIFY(!(invalid1 < invalid2)); +} + QTEST_MAIN(tst_QStandardItem) #include "tst_qstandarditem.moc" |