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diff --git a/sd/source/ui/slidesorter/controller/SlsListener.hxx b/sd/source/ui/slidesorter/controller/SlsListener.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef SD_SLIDESORTER_SLIDE_SORTER_LISTENER_HXX
+#define SD_SLIDESORTER_SLIDE_SORTER_LISTENER_HXX
+
+#include "MutexOwner.hxx"
+#include "controller/SlideSorterController.hxx"
+#include <com/sun/star/document/XEventListener.hpp>
+#include <com/sun/star/beans/XPropertyChangeListener.hpp>
+#include <com/sun/star/accessibility/XAccessibleEventListener.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/frame/XFrameActionListener.hpp>
+#include <cppuhelper/compbase4.hxx>
+
+#include <svl/lstner.hxx>
+#include <tools/link.hxx>
+#include <boost/shared_ptr.hpp>
+
+namespace sd {
+class ViewShellBase;
+}
+
+namespace sd { namespace tools {
+class EventMultiplexerEvent;
+} }
+
+namespace sd { namespace slidesorter {
+class SlideSorter;
+} }
+
+
+namespace sd { namespace slidesorter { namespace controller {
+
+typedef cppu::WeakComponentImplHelper4<
+    ::com::sun::star::document::XEventListener,
+    ::com::sun::star::beans::XPropertyChangeListener,
+    ::com::sun::star::accessibility::XAccessibleEventListener,
+    ::com::sun::star::frame::XFrameActionListener
+    > ListenerInterfaceBase;
+
+class SlideSorterController;
+
+/** Listen for events of various types and sources and react to them.  This
+    class is a part of the controller.
+
+    When the view shell in the center pane is replaced by another the
+    associated controller is replaced as well.  Therefore we have to
+    register at the frame and on certain FrameActionEvents to stop listening
+    to the old controller and register as listener at the new one.
+*/
+class Listener
+    : protected MutexOwner,
+      public ListenerInterfaceBase,
+      public SfxListener
+{
+public:
+    Listener (SlideSorter& rSlideSorter);
+    virtual ~Listener (void);
+
+    /** Connect to the current controller of the view shell as listener.
+        This method is called once during initialization and every time a
+        FrameActionEvent signals the current controller being exchanged.
+        When the connection is successfull then the flag
+        mbListeningToController is set to <TRUE/>.
+    */
+    void ConnectToController (void);
+
+    /** Disconnect from the current controller of the view shell as
+        listener.  This method is called once during initialization and
+        every time a FrameActionEvent signals the current controller being
+        exchanged.  When this method terminates then mbListeningToController
+        is <FALSE/>.
+    */
+    void DisconnectFromController (void);
+
+    virtual void Notify (
+        SfxBroadcaster& rBroadcaster,
+        const SfxHint& rHint);
+
+    //=====  lang::XEventListener  ============================================
+    virtual void SAL_CALL
+        disposing (const ::com::sun::star::lang::EventObject& rEventObject)
+        throw (::com::sun::star::uno::RuntimeException);
+
+
+    //=====  document::XEventListener  ========================================
+    virtual void SAL_CALL
+        notifyEvent (
+            const ::com::sun::star::document::EventObject& rEventObject)
+        throw (::com::sun::star::uno::RuntimeException);
+
+    //=====  beans::XPropertySetListener  =====================================
+    virtual void SAL_CALL
+        propertyChange (
+            const com::sun::star::beans::PropertyChangeEvent& rEvent)
+        throw (::com::sun::star::uno::RuntimeException);
+
+    //===== accessibility::XAccessibleEventListener  ==========================
+    virtual void SAL_CALL
+        notifyEvent (
+            const ::com::sun::star::accessibility::AccessibleEventObject&
+            rEvent)
+        throw (::com::sun::star::uno::RuntimeException);
+
+    //===== frame::XFrameActionListener  ======================================
+    /** For certain actions the listener connects to a new controller of the
+        frame it is listening to.  This usually happens when the view shell
+        in the center pane is replaced by another view shell.
+    */
+    virtual void SAL_CALL
+        frameAction (const ::com::sun::star::frame::FrameActionEvent& rEvent)
+        throw (::com::sun::star::uno::RuntimeException);
+
+    virtual void SAL_CALL disposing (void);
+
+private:
+    SlideSorter& mrSlideSorter;
+    SlideSorterController& mrController;
+    ViewShellBase* mpBase;
+
+    /// Remember whether we are listening to the document.
+    bool mbListeningToDocument;
+    /// Remember whether we are listening to the UNO document.
+    bool mbListeningToUNODocument;
+    /// Remember whether we are listening to the UNO controller.
+    bool mbListeningToController;
+    /// Remember whether we are listening to the frame.
+    bool mbListeningToFrame;
+    bool mbIsMainViewChangePending;
+
+    ::com::sun::star::uno::WeakReference< ::com::sun::star::frame::XController> mxControllerWeak;
+    ::com::sun::star::uno::WeakReference< ::com::sun::star::frame::XFrame> mxFrameWeak;
+
+    /** This object is used to lock the model between some
+        events.  It is refernce counted in order to cope with events that
+        are expected but never sent.
+    */
+    ::boost::shared_ptr<SlideSorterController::ModelChangeLock> mpModelChangeLock;
+
+    void ReleaseListeners (void);
+
+    /** Called when the edit mode has changed.  Update model accordingly.
+    */
+    void UpdateEditMode (void);
+
+    /** Handle a change in the order of slides or when the set of slides has
+        changed, i.e. a slide has been created.
+    */
+    void HandleModelChange (const SdrPage* pPage);
+
+    /** Handle a modification to a shape on the given page.  When this is a
+        regular page then update its preview.  When it is a master page then
+        additionally update the previews of all pages linked to it.
+    */
+    void HandleShapeModification (const SdrPage* pPage);
+
+    /** This method throws a DisposedException when the object has already been
+        disposed.
+    */
+    void ThrowIfDisposed (void)
+        throw (::com::sun::star::lang::DisposedException);
+
+    DECL_LINK(EventMultiplexerCallback, tools::EventMultiplexerEvent*);
+};
+
+} } } // end of namespace ::sd::slidesorter::controller
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */