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diff --git a/sd/source/ui/inc/framework/Pane.hxx b/sd/source/ui/inc/framework/Pane.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_SD_SOURCE_UI_INC_FRAMEWORK_PANE_HXX
+#define INCLUDED_SD_SOURCE_UI_INC_FRAMEWORK_PANE_HXX
+
+#include <MutexOwner.hxx>
+
+#include <com/sun/star/drawing/framework/XPane.hpp>
+#include <com/sun/star/drawing/framework/XPane2.hpp>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
+#include <cppuhelper/compbase.hxx>
+#include <vcl/vclptr.hxx>
+#include <vcl/window.hxx>
+
+namespace sd::framework {
+
+typedef ::cppu::WeakComponentImplHelper <
+      css::drawing::framework::XPane,
+      css::drawing::framework::XPane2,
+      css::lang::XUnoTunnel
+    > PaneInterfaceBase;
+
+/** A pane is a wrapper for a window and possibly for a tab bar (for view
+    switching).  Panes are unique resources.
+
+    This class has two responsibilities:
+    1. It implements the XPane interface.  This is the most important
+    interface of this class for API based views (of which there not that
+    many yet) because it gives access to the XWindow.
+    2. It gives access to the underlying VCL Window by implementing the
+    XUnoTunnel interface.  This is necessary at the moment and in the
+    foreseeable future because many parts of the Draw and Impress views rely
+    on direct access on the Window class.
+*/
+class Pane
+    : protected MutexOwner,
+      public PaneInterfaceBase
+{
+public:
+    /** Create a new Pane object that wraps the given window.
+        @param rsPaneURL
+            The URL that is used by the configuration to identify the pane.
+            The given URL has to be valid.
+        @param pWindow
+            The VCL Window (usually this really is an sd::Window) that is
+            wrapped by the new Pane object.  The given pointer must not be
+            NULL.
+    */
+    Pane (
+        const css::uno::Reference<css::drawing::framework::XResourceId>& rxPaneId,
+        vcl::Window* pWindow)
+        throw ();
+    virtual ~Pane() override;
+
+    virtual void SAL_CALL disposing() override;
+
+    static const css::uno::Sequence<sal_Int8>& getUnoTunnelId();
+
+    /** This method is typically used together with the XUnoTunnel to obtain
+        a Window pointer from an XPane object.
+    */
+    virtual vcl::Window* GetWindow();
+
+    //----- XPane -------------------------------------------------------------
+
+    /** For a UNO API based implementation of a view this may the most
+        important method of this class because the view is only interested
+        in the window of the pane.
+    */
+    virtual css::uno::Reference<css::awt::XWindow>
+        SAL_CALL getWindow() override;
+
+    virtual css::uno::Reference<css::rendering::XCanvas>
+        SAL_CALL getCanvas() override;
+
+    //----- XPane2 -------------------------------------------------------------
+
+    virtual sal_Bool SAL_CALL isVisible() override;
+
+    virtual void SAL_CALL setVisible (sal_Bool bIsVisible) override;
+
+    virtual css::uno::Reference<css::accessibility::XAccessible> SAL_CALL getAccessible() override;
+
+    virtual void SAL_CALL setAccessible (
+        const css::uno::Reference<css::accessibility::XAccessible>& rxAccessible) override;
+
+    //----- XResource ---------------------------------------------------------
+
+    virtual css::uno::Reference<css::drawing::framework::XResourceId>
+        SAL_CALL getResourceId() override;
+
+    /** For the typical pane it makes no sense to be displayed without a
+        view.  Therefore this default implementation returns always <TRUE/>.
+    */
+    virtual sal_Bool SAL_CALL isAnchorOnly() override;
+
+    //----- XUnoTunnel --------------------------------------------------------
+
+    virtual sal_Int64 SAL_CALL getSomething (const css::uno::Sequence<sal_Int8>& rId) override;
+
+protected:
+    css::uno::Reference<css::drawing::framework::XResourceId> mxPaneId;
+    VclPtr<vcl::Window> mpWindow;
+    css::uno::Reference<css::awt::XWindow> mxWindow;
+    css::uno::Reference<css::rendering::XCanvas> mxCanvas;
+
+    /** Override this method, not getCanvas(), when you want to provide a
+        different canvas.
+
+        @throws css::uno::RuntimeException
+    */
+    virtual css::uno::Reference<css::rendering::XCanvas>
+        CreateCanvas();
+
+    /** Throw DisposedException when the object has already been disposed or
+        is currently being disposed.  Otherwise this method returns
+        normally.
+
+        @throws css::lang::DisposedException
+    */
+    void ThrowIfDisposed() const;
+};
+
+} // end of namespace sd::framework
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */