1 /*************************************************************************
2  *
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * Copyright 2000, 2010 Oracle and/or its affiliates.
6  *
7  * OpenOffice.org - a multi-platform office productivity suite
8  *
9  * This file is part of OpenOffice.org.
10  *
11  * OpenOffice.org is free software: you can redistribute it and/or modify
12  * it under the terms of the GNU Lesser General Public License version 3
13  * only, as published by the Free Software Foundation.
14  *
15  * OpenOffice.org is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU Lesser General Public License version 3 for more details
19  * (a copy is included in the LICENSE file that accompanied this code).
20  *
21  * You should have received a copy of the GNU Lesser General Public License
22  * version 3 along with OpenOffice.org.  If not, see
23  * <http://www.openoffice.org/license.html>
24  * for a copy of the LGPLv3 License.
25  *
26  ************************************************************************/
27 
28 #ifndef INCLUDED_SLIDESHOW_PAIRANIMATION_HXX
29 #define INCLUDED_SLIDESHOW_PAIRANIMATION_HXX
30 
31 #include "animation.hxx"
32 #include <basegfx/tuple/b2dtuple.hxx>
33 
34 
35 /* Definition of PairAnimation interface */
36 
37 namespace slideshow
38 {
39     namespace internal
40     {
41         /** Interface defining a pair of numbers animation.
42 
43         	This interface is a specialization of the Animation
44         	interface, and is used to animate attributes representable
45         	by a pair of floating point values (e.g. a position or a
46         	size).
47          */
48         class PairAnimation : public Animation
49         {
50         public:
51             typedef ::basegfx::B2DTuple ValueType;
52 
53             /** Set the animation to the given value
54 
55                 @param rValue
56                 Current animation value.
57              */
58             virtual bool operator()( const ValueType& rValue ) = 0;
59 
60             /** Request the underlying value for this animation.
61 
62             	This is necessary for pure To or By animations, as the
63             	Activity cannot determine a sensible start value
64             	otherwise.
65 
66                 @attention Note that you are only permitted to query
67                 for the underlying value, if the animation has actually
68                 been started (via start() call).
69              */
70             virtual ValueType getUnderlyingValue() const = 0;
71         };
72 
73         typedef ::boost::shared_ptr< PairAnimation > PairAnimationSharedPtr;
74 
75     }
76 }
77 
78 #endif /* INCLUDED_SLIDESHOW_PAIRANIMATION_HXX */
79