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