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