QSortFilterProxyModel::reset() should invalidate.

This was broken by: d149a3faca9b97ce806249bc7ef73fe2f59589d5

The connection was removed in that commit because we did not want
the layoutChanged signal to be emitted.  So instead of calling
invalidate(), we call clearMapping() directly.
In order to do that, clear_mapping has been turned into a private slot

Task-number: QTBUG-17812
Reviewed-by: Gabriel

1 files changed, 57 insertions, 0 deletions

diff --git a/tests/auto/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp b/tests/auto/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp
index bce7281..dfe47cb 100644
--- a/tests/auto/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp
+++ b/tests/auto/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp
@@ -144,6 +144,8 @@ private slots:
     void taskQTBUG_7537_appearsAndSort();
     void taskQTBUG_7716_unnecessaryDynamicSorting();
     void taskQTBUG_10287_unnecessaryMapCreation();
+    void taskQTBUG_17812_resetInvalidate_data();
+    void taskQTBUG_17812_resetInvalidate();
 
     void testMultipleProxiesWithSelection();
     void mapSelectionFromSource();
@@ -3213,5 +3215,60 @@ void tst_QSortFilterProxyModel::filteredColumns()
 
 }
 
+void tst_QSortFilterProxyModel::taskQTBUG_17812_resetInvalidate_data()
+{
+    QTest::addColumn<int>("test");
+    QTest::addColumn<bool>("works");
+
+    QTest::newRow("nothing") << 0 << false;
+    QTest::newRow("reset") << 1 << true;
+    QTest::newRow("invalidate") << 2 << true;
+    QTest::newRow("invalidate_filter") << 3 << true;
+}
+
+void tst_QSortFilterProxyModel::taskQTBUG_17812_resetInvalidate()
+{
+    QFETCH(int, test);
+    QFETCH(bool, works);
+
+    struct Proxy : QSortFilterProxyModel {
+        QString pattern;
+        virtual bool filterAcceptsRow(int source_row, const QModelIndex&) const {
+            return sourceModel()->data(sourceModel()->index(source_row, 0)).toString().contains(pattern);
+        }
+        void notifyChange(int test) {
+            switch (test) {
+            case 0: break;
+            case 1: reset(); break;
+            case 2: invalidate(); break;
+            case 3: invalidateFilter(); break;
+            }
+        }
+    };
+
+    QStringListModel sourceModel(QStringList() << "Poisson" << "Vache" << "Brebis"
+                                               << "Elephant" << "Cochon" << "Serpent"
+                                               << "Mouton" << "Ecureuil" << "Mouche");
+    Proxy proxy;
+    proxy.pattern = QString::fromLatin1("n");
+    proxy.setSourceModel(&sourceModel);
+
+    QCOMPARE(proxy.rowCount(), 5);
+    for (int i = 0; i < proxy.rowCount(); i++) {
+        QVERIFY(proxy.data(proxy.index(i,0)).toString().contains('n'));
+    }
+
+    proxy.pattern = QString::fromLatin1("o");
+    proxy.notifyChange(test);
+
+    QCOMPARE(proxy.rowCount(), works ? 4 : 5);
+    bool ok = true;
+    for (int i = 0; i < proxy.rowCount(); i++) {
+        if (!proxy.data(proxy.index(i,0)).toString().contains('o'))
+            ok = false;
+    }
+    QCOMPARE(ok, works);
+}
+
 QTEST_MAIN(tst_QSortFilterProxyModel)
 #include "tst_qsortfilterproxymodel.moc"