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+/*************************************************************************
+ *
+ * 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 INCLUDED_SLIDESHOW_VIEWEVENTHANDLER_HXX
+#define INCLUDED_SLIDESHOW_VIEWEVENTHANDLER_HXX
+
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+
+#include "unoview.hxx"
+
+
+/* Definition of ViewEventHandler interface */
+
+namespace slideshow
+{
+    namespace internal
+    {
+
+        /** Interface for handling view events.
+
+            Classes implementing this interface can be added to an
+            EventMultiplexer object, and are called from there to
+            handle view events.
+         */
+        class ViewEventHandler
+        {
+        public:
+            virtual ~ViewEventHandler() {}
+
+            /** Notify new view.
+
+                @param rView
+                The newly added view
+             */
+            virtual void viewAdded( const UnoViewSharedPtr& rView ) = 0;
+
+            /** Notify removed view.
+
+                @param rView
+                The removed view
+             */
+            virtual void viewRemoved( const UnoViewSharedPtr& rView ) = 0;
+
+            /** Notify changed view.
+
+                Reasons for a viewChanged notification can be
+                different view size, transformation, or other device
+                properties (color resolution or profile, etc.)
+
+                @param rView
+                The changed view
+             */
+            virtual void viewChanged( const UnoViewSharedPtr& rView ) = 0;
+
+            /** Notify that all views changed.
+
+                Reasons for a viewChanged notification can be
+                different view size, transformation, or other device
+                properties (color resolution or profile, etc.)
+
+                Note that this method avoids hidden inefficiencies
+                (O(n^2) behaviour when viewChanged() needs to perform
+                linear searches)
+             */
+            virtual void viewsChanged() = 0;
+        };
+
+        typedef ::boost::shared_ptr< ViewEventHandler > ViewEventHandlerSharedPtr;
+        typedef ::boost::weak_ptr< ViewEventHandler >   ViewEventHandlerWeakPtr;
+
+    }
+}
+
+#endif /* INCLUDED_SLIDESHOW_VIEWEVENTHANDLER_HXX */