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diff --git a/offapi/com/sun/star/awt/tree/XTreeDataModelListener.idl b/offapi/com/sun/star/awt/tree/XTreeDataModelListener.idl
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+++ b/offapi/com/sun/star/awt/tree/XTreeDataModelListener.idl
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#ifndef __com_sun_star_awt_tree_XTreeDataModelListener_idl__
+#define __com_sun_star_awt_tree_XTreeDataModelListener_idl__
+
+#include <com/sun/star/lang/XEventListener.idl>
+
+#include <com/sun/star/awt/tree/TreeDataModelEvent.idl>
+
+
+
+module com {  module sun {  module star {  module awt {  module tree {
+
+
+/** An instance of this interface is used by the TreeControl to
+    get notifications about data model changes.
+
+    <p>Usually you must not implement this interface yourself as it is already handled
+    by the TreeControl, but you must notify it correctly if
+    you implement the XTreeDataModel yourself</p>.
+ */
+interface XTreeDataModelListener: com::sun::star::lang::XEventListener
+{
+    /** Invoked after a node (or a set of siblings) has changed in some way.
+        The node(s) have not changed locations in the tree or altered their
+        children arrays, but other attributes have changed and may affect
+        presentation.
+
+        Example: the name of a file has changed, but it is in the same location in the file system.
+
+        To indicate the root has changed, TreeDataModelEvent::Nodes will contain
+        the root node and TreeDataModelEvent::ParentNode will be empty.
+    */
+    void treeNodesChanged( [in] TreeDataModelEvent Event );
+
+    /** Invoked after nodes have been inserted into the tree.
+
+        Use TreeDataModelEvent::ParentNode to get the parent of the new node(s).
+        TreeDataModelEvent::Nodes contains the new node(s).
+    */
+    void treeNodesInserted( [in] TreeDataModelEvent Event );
+
+    /** Invoked after nodes have been removed from the tree.
+        <p>Note that if a subtree is removed from the tree,
+        this method may only be invoked once for the root of the removed subtree,
+        not once for each individual set of siblings removed.
+
+        Use TreeDataModelEvent::ParentNode to get the former parent of the deleted node(s).
+        TreeDataModelEvent::Nodes contains the removed node(s).
+    */
+    void treeNodesRemoved( [in] TreeDataModelEvent Event );
+
+    /** Invoked after the tree has drastically changed structure from a given node down.
+
+        Use TreeDataModelEvent::ParentNode to get the node which
+        structure has changed. TreeDataModelEvent::Nodes is empty.
+    */
+    void treeStructureChanged( [in] TreeDataModelEvent Event );
+};
+
+
+}; }; }; }; };
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */