slideshow/source/inc/stringanimation.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   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
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   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
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  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_SOURCE_INC_STRINGANIMATION_HXX
  21 #define INCLUDED_SLIDESHOW_SOURCE_INC_STRINGANIMATION_HXX
  22
  23 #include "animation.hxx"
  24 #include <rtl/ustring.hxx>
  25
  26
  27 /* Definition of StringAnimation interface */
  28
  29 namespace slideshow::internal
  30     {
  31         /** Interface defining a string animation.
  32
  33             This interface is a specialization of the Animation
  34             interface, and is used to animate attributes representable
  35             by a discrete character string (e.g. font names)
  36          */
  37         class StringAnimation : public Animation
  38         {
  39         public:
  40             typedef OUString ValueType;
  41
  42             /** Set the animation to value rStr
  43
  44                 @param rStr
  45                 Current animation value.
  46              */
  47             virtual bool operator()( const ValueType& rStr ) = 0;
  48
  49             /** Request the underlying value for this animation.
  50
  51                 This is necessary for pure To or By animations, as the
  52                 Activity cannot determine a sensible start value
  53                 otherwise.
  54
  55                 @attention Note that you are only permitted to query
  56                 for the underlying value, if the animation has actually
  57                 been started (via start() call).
  58              */
  59             virtual ValueType getUnderlyingValue() const = 0;
  60         };
  61
  62         typedef ::std::shared_ptr< StringAnimation > StringAnimationSharedPtr;
  63
  64 }
  65
  66 #endif // INCLUDED_SLIDESHOW_SOURCE_INC_STRINGANIMATION_HXX
  67
  68 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */