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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
// Based on code by omergilad.
#ifndef GUI_ANIMATION_ANIMATION_H
#define GUI_ANIMATION_ANIMATION_H
#include "gui/animation/Animation.h"
namespace GUI {
class AlphaAnimation: public Animation {
public:
AlphaAnimation() {}
virtual ~AlphaAnimation() {}
float getEndAlpha() const { return _endAlpha; }
void setEndAlpha(float endAlpha) { _endAlpha = endAlpha; }
float getStartAlpha() const { return _startAlpha; }
void setStartAlpha(float startAlpha) { _startAlpha = startAlpha; }
protected:
virtual void updateInternal(Drawable* drawable, float interpolation) {
// Calculate alpha value based on properties and interpolation
drawable->setAlpha(_startAlpha * (1 - interpolation) + _endAlpha * interpolation);
}
float _startAlpha;
float _endAlpha;
};
} // End of namespace GUI
#endif /* GUI_ANIMATION_ANIMATION_H */
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