/****************************************************************************
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** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
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****************************************************************************/

#include "qcameraselector.h"
#include "qcameraselector_p.h"
#include <Qt3DCore/qentity.h>
#include <Qt3DCore/private/qentity_p.h>
#include <Qt3DCore/qscenepropertychange.h>

QT_BEGIN_NAMESPACE

namespace Qt3DRender {

/*!
    \class Qt3DRender::QCameraSelector
    \inmodule Qt3DRender
*/

/*! \internal */
QCameraSelector::QCameraSelector(QCameraSelectorPrivate &dd, QNode *parent)
    : QFrameGraphNode(dd, parent)
{
}

QCameraSelectorPrivate::QCameraSelectorPrivate()
    : QFrameGraphNodePrivate()
    , m_camera(Q_NULLPTR)
{}

void QCameraSelector::copy(const QNode *ref)
{
    QFrameGraphNode::copy(ref);
    const QCameraSelector *other = static_cast<const QCameraSelector*>(ref);

    if (other->d_func()->m_camera)
        setCamera(qobject_cast<Qt3DCore::QEntity *>(QNode::clone(other->d_func()->m_camera)));
}

QCameraSelector::QCameraSelector(Qt3DCore::QNode *parent)
    :   QFrameGraphNode(*new QCameraSelectorPrivate, parent)
{}

QCameraSelector::~QCameraSelector()
{
    QNode::cleanup();
}

/*!
    \property Qt3DRender::QCameraSelector::camera
*/
void QCameraSelector::setCamera(Qt3DCore::QEntity *camera)
{
    Q_D(QCameraSelector);
    if (d->m_camera != camera) {
        d->m_camera = camera;

        // We need to add it as a child of the current node if it has been declared inline
        // Or not previously added as a child of the current node so that
        // 1) The backend gets notified about it's creation
        // 2) When the current node is destroyed, it gets destroyed as well
        if (camera && !camera->parent())
            camera->setParent(this);
        emit cameraChanged(camera);
    }
}

Qt3DCore::QEntity *QCameraSelector::camera() const
{
    Q_D(const QCameraSelector);
    return d->m_camera;
}

} // namespace Qt3DRender

QT_END_NAMESPACE