CardTransition.h

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/* @@@LICENSE
*
*      Copyright (c) 2009-2012 Hewlett-Packard Development Company, L.P.
*
* Licensed 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* LICENSE@@@ */




#ifndef CARDTRANSITION_H
#define CARDTRANSITION_H

#include "Common.h"

#include <string>
#include <stdint.h>

#include <QPainter>
#include <QPixmap>

#include "AnimationEquations.h"

class CardWindow;

class CardTransition
{
public:

        CardTransition(CardWindow* win,
                                   QPixmap* fromPixmap,
                                   const std::string& transitionName);
        ~CardTransition();

        bool finished();
        
        void markCompleted(bool val) { m_completed = val; }
        bool completed() const { return m_completed; }

        // Returns true if transition is done
        void draw(QPainter* painter, const QPainterPath &path, bool maximized);

private:

        enum TransitionType {
                Transition_Invalid,
                Transition_ZoomAndCrossFade,
                Transition_CrossFade
        };

        struct AnimObject {
                PValue startScale;
                PValue targetScale;
                int startAlpha;
                int targetAlpha;
        };

private:

        void zoomAndCrossFadeTick(QPainter* painter, const QPainterPath &path, bool maximized);
        void crossFadeTick(QPainter* painter, const QPainterPath &path, bool maximized);

private:

        CardWindow* m_win;
        
        QPixmap* m_fromScenePixmap;

        AnimObject m_fromSceneAnimObject;
        AnimObject m_toSceneAnimObject;

        TransitionType m_transitionType;
        bool m_transitionIsPop;

        uint32_t m_startTime;
        bool m_completed;

        AnimationEquation m_equation;
};

#endif /* CARDTRANSITION_H */