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diff --git a/slideshow/source/inc/animation.hxx b/slideshow/source/inc/animation.hxx
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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_ANIMATION_HXX
+#define INCLUDED_SLIDESHOW_ANIMATION_HXX
+
+#include <animatableshape.hxx>
+#include <shapeattributelayer.hxx>
+
+
+/* Definition of Animation interface */
+
+namespace slideshow
+{
+    namespace internal
+    {
+        /** Interface defining a generic animation.
+
+            This interface is used by objects implementing the
+            Activity interface to drive the animation effect. Objects
+            implementing this interface will receive time-varying
+            animation values, which they can forward to the
+            appropriate attributes. The type of these animation values
+            is given in derived interfaces.
+
+            @see NumberAnimation
+            @see ColorAnimation
+            @see PairAnimation
+         */
+        class Animation
+        {
+        public:
+            virtual ~Animation() {}
+
+            /** Notify that the animation going active soon.
+
+                Implementers should preload any buffers, and create
+                any expensive objects at this time.
+
+                @param rShape
+                Shape to apply this animation to.
+
+                @param rAttrLayer
+                Attribute layer to play the animation on.
+             */
+            virtual void prefetch( const AnimatableShapeSharedPtr&     rShape,
+                                   const ShapeAttributeLayerSharedPtr& rAttrLayer ) = 0;
+
+            /** Notify that the animation is about to begin.
+
+                Implementers are free to start accompanying effects,
+                such as sounds, and the animation timer now.
+
+                @param rShape
+                Shape to apply this animation to.
+
+                @param rAttrLayer
+                Attribute layer to play the animation on.
+             */
+            virtual void start( const AnimatableShapeSharedPtr&     rShape,
+                                const ShapeAttributeLayerSharedPtr& rAttrLayer ) = 0;
+
+            /** Notify that the animation is about to end.
+             */
+            virtual void end() = 0;
+        };
+
+        typedef ::boost::shared_ptr< Animation > AnimationSharedPtr;
+
+    }
+}
+
+#endif /* INCLUDED_SLIDESHOW_ANIMATION_HXX */