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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 INCLUDED_SLIDESHOW_PAIRANIMATION_HXX
      21             : #define INCLUDED_SLIDESHOW_PAIRANIMATION_HXX
      22             : 
      23             : #include "animation.hxx"
      24             : #include <basegfx/tuple/b2dtuple.hxx>
      25             : 
      26             : 
      27             : /* Definition of PairAnimation interface */
      28             : 
      29             : namespace slideshow
      30             : {
      31             :     namespace internal
      32             :     {
      33             :         /** Interface defining a pair of numbers animation.
      34             : 
      35             :             This interface is a specialization of the Animation
      36             :             interface, and is used to animate attributes representable
      37             :             by a pair of floating point values (e.g. a position or a
      38             :             size).
      39             :          */
      40           0 :         class PairAnimation : public Animation
      41             :         {
      42             :         public:
      43             :             typedef ::basegfx::B2DTuple ValueType;
      44             : 
      45             :             /** Set the animation to the given value
      46             : 
      47             :                 @param rValue
      48             :                 Current animation value.
      49             :              */
      50             :             virtual bool operator()( const ValueType& rValue ) = 0;
      51             : 
      52             :             /** Request the underlying value for this animation.
      53             : 
      54             :                 This is necessary for pure To or By animations, as the
      55             :                 Activity cannot determine a sensible start value
      56             :                 otherwise.
      57             : 
      58             :                 @attention Note that you are only permitted to query
      59             :                 for the underlying value, if the animation has actually
      60             :                 been started (via start() call).
      61             :              */
      62             :             virtual ValueType getUnderlyingValue() const = 0;
      63             :         };
      64             : 
      65             :         typedef ::boost::shared_ptr< PairAnimation > PairAnimationSharedPtr;
      66             : 
      67             :     }
      68             : }
      69             : 
      70             : #endif /* INCLUDED_SLIDESHOW_PAIRANIMATION_HXX */
      71             : 
      72             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */