/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
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** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
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** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
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**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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****************************************************************************/

#include <QWindow>

#include <QtGui/qopengl.h>
#include <QtGui/qopenglshaderprogram.h>
#include <QtGui/qopenglframebufferobject.h>

#include <QPropertyAnimation>

#include <QColor>
#include <QImage>
#include <QTime>

QT_BEGIN_NAMESPACE
class QOpenGLContext;
QT_END_NAMESPACE

class PaintedWindow : public QWindow
{
    Q_OBJECT
    Q_PROPERTY(qreal rotation READ rotation WRITE setRotation NOTIFY rotationChanged)

public:
    PaintedWindow();

    qreal rotation() const { return m_rotation; }

signals:
    void rotationChanged(qreal rotation);

private slots:
    void paint();
    void setRotation(qreal r);
    void orientationChanged(Qt::ScreenOrientation newOrientation);
    void rotationDone();

private:
    void exposeEvent(QExposeEvent *) Q_DECL_OVERRIDE;
    void mousePressEvent(QMouseEvent *) Q_DECL_OVERRIDE;

    void paint(QPainter *painter, const QRect &rect);

    QOpenGLContext *m_context;
    qreal m_rotation;

    QImage m_prevImage;
    QImage m_nextImage;
    qreal m_deltaRotation;

    Qt::ScreenOrientation m_targetOrientation;
    Qt::ScreenOrientation m_nextTargetOrientation;

    QPropertyAnimation *m_animation;
    QTimer *m_paintTimer;
};
