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diff --git a/reportdesign/source/ui/inc/ReportControllerObserver.hxx b/reportdesign/source/ui/inc/ReportControllerObserver.hxx
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+++ b/reportdesign/source/ui/inc/ReportControllerObserver.hxx
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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 INCLUDED_REPORTDESIGN_SOURCE_UI_INC_REPORTCONTROLLEROBSERVER_HXX
+#define INCLUDED_REPORTDESIGN_SOURCE_UI_INC_REPORTCONTROLLEROBSERVER_HXX
+
+#include <com/sun/star/beans/XPropertyChangeListener.hpp>
+#include <com/sun/star/beans/PropertyChangeEvent.hpp>
+#include <cppuhelper/implbase.hxx>
+
+#include <memory>
+
+#include <tools/link.hxx>
+
+#include "FormattedFieldBeautifier.hxx"
+#include "FixedTextColor.hxx"
+
+class VclSimpleEvent;
+
+namespace rptui
+{
+    class OReportController;
+    class OXReportControllerObserverImpl;
+
+
+    class OXReportControllerObserver
+        : public ::cppu::WeakImplHelper<   css::beans::XPropertyChangeListener
+                                        ,   css::container::XContainerListener
+                                        ,   css::util::XModifyListener
+                                        >
+    {
+
+        const ::std::unique_ptr<OXReportControllerObserverImpl> m_pImpl;
+
+        FormattedFieldBeautifier m_aFormattedFieldBeautifier;
+        FixedTextColor           m_aFixedTextColor;
+
+        // do not allow copy
+        OXReportControllerObserver(const OXReportControllerObserver&) = delete;
+        OXReportControllerObserver& operator=(const OXReportControllerObserver&) = delete;
+        virtual  ~OXReportControllerObserver() override; // UNO Object must have private destructor!
+    public:
+        OXReportControllerObserver(const OReportController& _rController);
+
+        // XPropertyChangeListener
+        virtual void SAL_CALL propertyChange(const css::beans::PropertyChangeEvent& evt) override;
+
+        // XEventListener
+        virtual void SAL_CALL disposing(const css::lang::EventObject& Source) override;
+
+        // XContainerListener
+        virtual void SAL_CALL elementInserted(const css::container::ContainerEvent& rEvent) override;
+        virtual void SAL_CALL elementReplaced(const css::container::ContainerEvent& rEvent) override;
+        virtual void SAL_CALL elementRemoved(const css::container::ContainerEvent& rEvent) override;
+
+        // XModifyListener
+        virtual void SAL_CALL modified( const css::lang::EventObject& aEvent ) override;
+
+
+        void AddElement(const css::uno::Reference< css::uno::XInterface>& Element);
+        void RemoveElement(const css::uno::Reference< css::uno::XInterface>& Element);
+
+        void AddSection( const css::uno::Reference< css::report::XSection>& _xSection);
+        void RemoveSection( const css::uno::Reference< css::report::XSection>& _xSection );
+
+        /**
+           Create an object ob OUndoEnvLock locks the undo possibility
+           As long as in the OUndoEnvLock scope, no undo is possible for manipulated object.
+         */
+        class OEnvLock
+        {
+            OXReportControllerObserver& m_rObserver;
+        public:
+            OEnvLock(OXReportControllerObserver& _rObserver): m_rObserver(_rObserver){m_rObserver.Lock();}
+            ~OEnvLock(){ m_rObserver.UnLock(); }
+        };
+
+        void Lock();
+        void UnLock();
+
+        void Clear();
+    private:
+
+        void switchListening( const css::uno::Reference< css::container::XIndexAccess >& _rxContainer, bool _bStartListening );
+        void switchListening( const css::uno::Reference< css::uno::XInterface >& _rxObject, bool _bStartListening );
+
+        DECL_LINK(SettingsChanged, VclSimpleEvent&, void );
+    };
+
+} // namespace rptui
+
+#endif // INCLUDED_REPORTDESIGN_SOURCE_UI_INC_REPORTCONTROLLEROBSERVER_HXX
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */