KSPM: Fix setting selection state after source reset.

This ammends the parent commit.

autotests/kselectionproxymodeltest.cpp

@@ -20,12 +20,13 @@ private Q_SLOTS:
 
 void KSelectionProxyModelTest::selectOnSourceReset()
 {
-  QStringListModel strings({
+  QStringList days = {
     "Monday",
     "Tuesday",
     "Wednesday",
     "Thursday"
-  });
+  };
+  QStringListModel strings(days);
   QItemSelectionModel selectionModel(&strings);
 
   connect(&strings, &QAbstractItemModel::modelReset, [&] {
@@ -39,7 +40,16 @@ void KSelectionProxyModelTest::selectOnSourceReset()
   selectionModel.select(QItemSelection(strings.index(0, 0), strings.index(2, 0)),
                         QItemSelectionModel::Select);
 
-  strings.setStringList({ "One", "Two", "Three", "Four" });
+  QCOMPARE(proxy.rowCount(), 3);
+  for (int i = 0; i < 3; ++i)
+    QCOMPARE(proxy.index(i, 0).data().toString(), days.at(i));
+
+  QStringList numbers = { "One", "Two", "Three", "Four" };
+  strings.setStringList(numbers);
+
+  QCOMPARE(proxy.rowCount(), 3);
+  for (int i = 0; i < 3; ++i)
+    QCOMPARE(proxy.index(i, 0).data().toString(), numbers.at(i));
 
   QVERIFY(selectionModel.selection().contains(strings.index(0, 0)));
   QVERIFY(selectionModel.selection().contains(strings.index(1, 0)));

src/kselectionproxymodel.cpp

@@ -905,6 +905,7 @@ void KSelectionProxyModelPrivate::sourceModelReset()
     resetInternalData();
     m_sourceModelResetting = false;
     m_resetting = false;
+    selectionChanged(m_selectionModel->selection(), QItemSelection());
     q->endResetModel();
 }