/****************************************************************************
**
** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
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** This file is part of the Qt3D module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
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****************************************************************************/

#ifndef SCENE3DITEM_H
#define SCENE3DITEM_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/qpointer.h>
#include <QtQuick/QQuickItem>

QT_BEGIN_NAMESPACE

class QOffscreenSurface;

namespace Qt3DCore {
class QAspectEngine;
class QEntity;
}

namespace Qt3DRender {

class QCamera;
class QRenderAspect;
class Scene3DRenderer;
class Scene3DCleaner;

class Scene3DItem : public QQuickItem
{
    Q_OBJECT
    Q_PROPERTY(Qt3DCore::QEntity* entity READ entity WRITE setEntity NOTIFY entityChanged)
    Q_PROPERTY(QStringList aspects READ aspects WRITE setAspects NOTIFY aspectsChanged)
    Q_PROPERTY(bool multisample READ multisample WRITE setMultisample NOTIFY multisampleChanged)
    Q_PROPERTY(CameraAspectRatioMode cameraAspectRatioMode READ cameraAspectRatioMode WRITE setCameraAspectRatioMode NOTIFY cameraAspectRatioModeChanged)
    Q_PROPERTY(bool hoverEnabled READ isHoverEnabled WRITE setHoverEnabled NOTIFY hoverEnabledChanged)
    Q_CLASSINFO("DefaultProperty", "entity")
public:
    explicit Scene3DItem(QQuickItem *parent = 0);
    ~Scene3DItem();

    QStringList aspects() const;
    Qt3DCore::QEntity *entity() const;

    bool multisample() const;
    void setMultisample(bool enable);
    Q_INVOKABLE void setItemAreaAndDevicePixelRatio(QSize area, qreal devicePixelRatio);
    bool isHoverEnabled() const;

    enum CameraAspectRatioMode {
        AutomaticAspectRatio,
        UserAspectRatio
    };
    Q_ENUM(CameraAspectRatioMode); // LCOV_EXCL_LINE
    CameraAspectRatioMode cameraAspectRatioMode() const;

public Q_SLOTS:
    void setAspects(const QStringList &aspects);
    void setEntity(Qt3DCore::QEntity *entity);
    void setCameraAspectRatioMode(CameraAspectRatioMode mode);
    void setHoverEnabled(bool enabled);

Q_SIGNALS:
    void aspectsChanged();
    void entityChanged();
    void multisampleChanged();
    void cameraAspectRatioModeChanged(CameraAspectRatioMode mode);
    void hoverEnabledChanged();

private Q_SLOTS:
    void applyRootEntityChange();

private:
    QSGNode *updatePaintNode(QSGNode *node, UpdatePaintNodeData *nodeData) Q_DECL_OVERRIDE;
    void setWindowSurface(QObject *rootObject);
    void setCameraAspectModeHelper();
    void updateCameraAspectRatio();
    void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;

    QStringList m_aspects;
    Qt3DCore::QEntity *m_entity;

    Qt3DCore::QAspectEngine *m_aspectEngine;
    QRenderAspect *m_renderAspect;
    Scene3DRenderer *m_renderer;
    Scene3DCleaner *m_rendererCleaner;

    bool m_multisample;

    QPointer<Qt3DRender::QCamera> m_camera;
    CameraAspectRatioMode m_cameraAspectRatioMode;
    QOffscreenSurface *m_dummySurface;
};

} // Qt3DRender

QT_END_NAMESPACE

#endif