69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_SLIDESHOW_SOURCE_INC_PAIRANIMATION_HXX
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#define INCLUDED_SLIDESHOW_SOURCE_INC_PAIRANIMATION_HXX
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#include "animation.hxx"
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#include <basegfx/tuple/b2dtuple.hxx>
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/* Definition of PairAnimation interface */
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namespace slideshow::internal
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{
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/** Interface defining a pair of numbers animation.
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This interface is a specialization of the Animation
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interface, and is used to animate attributes representable
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by a pair of floating point values (e.g. a position or a
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size).
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*/
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class PairAnimation : public Animation
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{
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public:
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typedef ::basegfx::B2DTuple ValueType;
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/** Set the animation to the given value
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@param rValue
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Current animation value.
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*/
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virtual bool operator()( const ::basegfx::B2DTuple& rValue ) = 0;
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/** Request the underlying value for this animation.
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This is necessary for pure To or By animations, as the
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Activity cannot determine a sensible start value
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otherwise.
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@attention Note that you are only permitted to query
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for the underlying value, if the animation has actually
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been started (via start() call).
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*/
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virtual ::basegfx::B2DTuple getUnderlyingValue() const = 0;
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};
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typedef ::std::shared_ptr< PairAnimation > PairAnimationSharedPtr;
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}
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#endif // INCLUDED_SLIDESHOW_SOURCE_INC_PAIRANIMATION_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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