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       1                 :            : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2                 :            : /*
       3                 :            :  * This file is part of the LibreOffice project.
       4                 :            :  *
       5                 :            :  * This Source Code Form is subject to the terms of the Mozilla Public
       6                 :            :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7                 :            :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8                 :            :  *
       9                 :            :  * This file incorporates work covered by the following license notice:
      10                 :            :  *
      11                 :            :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12                 :            :  *   contributor license agreements. See the NOTICE file distributed
      13                 :            :  *   with this work for additional information regarding copyright
      14                 :            :  *   ownership. The ASF licenses this file to you under the Apache
      15                 :            :  *   License, Version 2.0 (the "License"); you may not use this file
      16                 :            :  *   except in compliance with the License. You may obtain a copy of
      17                 :            :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18                 :            :  */
      19                 :            : 
      20                 :            : #ifndef _VCLCANVAS_OUTDEVPROVIDER_HXX
      21                 :            : #define _VCLCANVAS_OUTDEVPROVIDER_HXX
      22                 :            : 
      23                 :            : #include <sal/types.h>
      24                 :            : #include <boost/shared_ptr.hpp>
      25                 :            : 
      26                 :            : 
      27                 :            : class OutputDevice;
      28                 :            : 
      29                 :            : namespace vclcanvas
      30                 :            : {
      31                 :            :     /* Definition of OutDevProvider interface */
      32                 :            : 
      33                 :            :     /** Implementers of this interface provide the CanvasHelper
      34                 :            :         with its OutputDevice.
      35                 :            : 
      36                 :            :         This additional level of indirection was necessary, as the
      37                 :            :         OutputDevice is not an interface. There had to be a mechanism
      38                 :            :         to detect the moment when an OutputDevice is rendered to
      39                 :            :         (e.g. for the BitmapBackBuffer).
      40                 :            :      */
      41                 :          0 :     class OutDevProvider
      42                 :            :     {
      43                 :            :     public:
      44                 :          0 :         virtual ~OutDevProvider() {}
      45                 :            : 
      46                 :            :         virtual OutputDevice&       getOutDev() = 0;
      47                 :            :         virtual const OutputDevice& getOutDev() const = 0;
      48                 :            :     };
      49                 :            : 
      50                 :            :     typedef ::boost::shared_ptr< OutDevProvider > OutDevProviderSharedPtr;
      51                 :            : }
      52                 :            : 
      53                 :            : #endif /* _VCLCANVAS_OUTDEVPROVIDER_HXX */
      54                 :            : 
      55                 :            : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */