1 files changed, 27 insertions, 0 deletions
diff --git a/src/controls/Private/qquicktreemodeladaptor_p.h b/src/controls/Private/qquicktreemodeladaptor_p.h
index e7192314..6e926db2 100644
--- a/src/controls/Private/qquicktreemodeladaptor_p.h
+++ b/src/controls/Private/qquicktreemodeladaptor_p.h
@@ -157,12 +157,39 @@ private:
         }
     };
 
+    struct DataChangedParams {
+        QModelIndex topLeft;
+        QModelIndex bottomRight;
+        QVector<int> roles;
+    };
+
+    struct SignalFreezer {
+        SignalFreezer(QQuickTreeModelAdaptor1 *parent) : m_parent(parent) {
+            m_parent->enableSignalAggregation();
+        }
+        ~SignalFreezer() { m_parent->disableSignalAggregation(); }
+
+    private:
+        QQuickTreeModelAdaptor1 *m_parent;
+    };
+
+    void enableSignalAggregation();
+    void disableSignalAggregation();
+    bool isAggregatingSignals() const { return m_signalAggregatorStack > 0; }
+    void queueDataChanged(const QModelIndex &topLeft,
+                          const QModelIndex &bottomRight,
+                          const QVector<int> &roles);
+    void emitQueuedSignals();
+
     QPointer<QAbstractItemModel> m_model;
     QPersistentModelIndex m_rootIndex;
     QList<TreeItem> m_items;
     QSet<QPersistentModelIndex> m_expandedItems;
     QList<TreeItem *> m_itemsToExpand;
     mutable int m_lastItemIndex;
+    bool m_visibleRowsMoved;
+    int m_signalAggregatorStack;
+    QVector<DataChangedParams> m_queuedDataChanged;
 };
 
 QT_END_NAMESPACE