Adjust the parent index for the itemsMoved call.

Not doing this causes the parent QModelIndexes to be out of sync with
the model.

The fix in fe350ca756df6392b3d0b7840351fccc89f9ef6f is extended to also
use adjusted indexes in the itemMove call.

Merge-request: 849
Reviewed-by: Olivier Goffart <olivier.goffart@nokia.com>
(cherry picked from commit 62dc9c9602987f4381481cc5642e3ea0782bb418)

3 files changed, 17 insertions, 4 deletions

diff --git a/src/corelib/kernel/qabstractitemmodel.cpp b/src/corelib/kernel/qabstractitemmodel.cpp
index 9a99ea1c57..05cb271752 100644
--- a/src/corelib/kernel/qabstractitemmodel.cpp
+++ b/src/corelib/kernel/qabstractitemmodel.cpp
@@ -2637,8 +2637,6 @@ void QAbstractItemModel::endMoveRows()
     QAbstractItemModelPrivate::Change insertChange = d->changes.pop();
     QAbstractItemModelPrivate::Change removeChange = d->changes.pop();
 
-    d->itemsMoved(removeChange.parent, removeChange.first, removeChange.last, insertChange.parent, insertChange.first, Qt::Vertical);
-
     QModelIndex adjustedSource = removeChange.parent;
     QModelIndex adjustedDestination = insertChange.parent;
 
@@ -2649,6 +2647,8 @@ void QAbstractItemModel::endMoveRows()
     if (removeChange.needsAdjust)
       adjustedSource = createIndex(adjustedSource.row() + numMoved, adjustedSource.column(), adjustedSource.internalPointer());
 
+    d->itemsMoved(adjustedSource, removeChange.first, removeChange.last, adjustedDestination, insertChange.first, Qt::Vertical);
+
     emit rowsMoved(adjustedSource, removeChange.first, removeChange.last, adjustedDestination, insertChange.first);
     emit layoutChanged();
 }
@@ -2861,8 +2861,6 @@ void QAbstractItemModel::endMoveColumns()
     QAbstractItemModelPrivate::Change insertChange = d->changes.pop();
     QAbstractItemModelPrivate::Change removeChange = d->changes.pop();
 
-    d->itemsMoved(removeChange.parent, removeChange.first, removeChange.last, insertChange.parent, insertChange.first, Qt::Horizontal);
-
     QModelIndex adjustedSource = removeChange.parent;
     QModelIndex adjustedDestination = insertChange.parent;
 
@@ -2873,6 +2871,8 @@ void QAbstractItemModel::endMoveColumns()
     if (removeChange.needsAdjust)
       adjustedSource = createIndex(adjustedSource.row(), adjustedSource.column() + numMoved, adjustedSource.internalPointer());
 
+    d->itemsMoved(adjustedSource, removeChange.first, removeChange.last, adjustedDestination, insertChange.first, Qt::Horizontal);
+
     emit columnsMoved(adjustedSource, removeChange.first, removeChange.last, adjustedDestination, insertChange.first);
     emit layoutChanged();
 }
diff --git a/tests/auto/modeltest/dynamictreemodel.cpp b/tests/auto/modeltest/dynamictreemodel.cpp
index b572eb16a1..fa634b6a5f 100644
--- a/tests/auto/modeltest/dynamictreemodel.cpp
+++ b/tests/auto/modeltest/dynamictreemodel.cpp
@@ -63,6 +63,13 @@ QModelIndex DynamicTreeModel::index(int row, int column, const QModelIndex &pare
 
   QList<QList<qint64> > childIdColumns = m_childItems.value(parent.internalId());
 
+  const qint64 grandParent = findParentId(parent.internalId());
+  if (grandParent >= 0) {
+    QList<QList<qint64> > parentTable = m_childItems.value(grandParent);
+    Q_ASSERT(parent.column() < parentTable.size());
+    QList<qint64> parentSiblings = parentTable.at(parent.column());
+    Q_ASSERT(parent.row() < parentSiblings.size());
+  }
 
   if (childIdColumns.size() == 0)
     return QModelIndex();
diff --git a/tests/auto/qabstractitemmodel/tst_qabstractitemmodel.cpp b/tests/auto/qabstractitemmodel/tst_qabstractitemmodel.cpp
index dbcccc93c5..b723253c63 100644
--- a/tests/auto/qabstractitemmodel/tst_qabstractitemmodel.cpp
+++ b/tests/auto/qabstractitemmodel/tst_qabstractitemmodel.cpp
@@ -1167,6 +1167,7 @@ void tst_QAbstractItemModel::testMoveToGrandParent_data()
 
     // Moving everything from one parent to another
     QTest::newRow("move12") << 0 << 9 << 10;
+    QTest::newRow("move13") << 0 << 9 << 0;
 }
 
 void tst_QAbstractItemModel::testMoveToGrandParent()
@@ -1314,6 +1315,11 @@ void tst_QAbstractItemModel::testMoveToSibling_data()
     QTest::newRow("move09") << 8 << 8 << 4;
     QTest::newRow("move10") << 8 << 8 << 5;
     QTest::newRow("move11") << 8 << 8 << 6;
+
+    // Move such that the destination parent no longer valid after the move.
+    // The destination parent is always QMI(5, 0), but after this move the
+    // row count is 5, so (5, 0) (used internally in QAIM) no longer refers to a valid index.
+    QTest::newRow("move12") << 0 << 4 << 0;
 }
 
 void tst_QAbstractItemModel::testMoveToSibling()