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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: */
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