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diff --git a/slideshow/source/inc/view.hxx b/slideshow/source/inc/view.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_SLIDESHOW_SOURCE_INC_VIEW_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_INC_VIEW_HXX
+
+#include "viewlayer.hxx"
+
+#include <memory>
+#include <vector>
+
+
+namespace basegfx { class B2DRange; class B2DVector; }
+
+
+/* Definition of View interface */
+
+namespace slideshow::internal
+    {
+        class View : public ViewLayer
+        {
+        public:
+            /** Create a new view layer for this view
+
+                @param rLayerBounds
+                Specifies the bound rect of the layer relative to the
+                user view coordinate system.
+
+                This method sets the bounds of the view layer in
+                document coordinates (i.e. 'logical' coordinates). The
+                resulting transformation is then concatenated with the
+                underlying view transformation, returned by the
+                getTransformation() method.
+             */
+            virtual ViewLayerSharedPtr createViewLayer( const basegfx::B2DRange& rLayerBounds ) const = 0;
+
+            /** Update screen representation from backbuffer
+             */
+            virtual bool updateScreen() const = 0;
+
+            /** Paint screen content unconditionally from backbuffer
+             */
+            virtual bool paintScreen() const = 0;
+
+            /** Set the size of the user view coordinate system.
+
+                This method sets the width and height of the view in
+                document coordinates (i.e. 'logical' coordinates). The
+                resulting transformation is then concatenated with the
+                underlying view transformation, returned by the
+                getTransformation() method.
+            */
+            virtual void setViewSize( const ::basegfx::B2DSize& ) = 0;
+
+            /** Change the view's mouse cursor.
+
+                @param nPointerShape
+                One of the css::awt::SystemPointer
+                constant group members.
+             */
+            virtual void setCursorShape( sal_Int16 nPointerShape ) = 0;
+        };
+
+        typedef std::shared_ptr< View >     ViewSharedPtr;
+        typedef std::vector< ViewSharedPtr >  ViewVector;
+
+}
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_INC_VIEW_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */