#include <QKeyEvent>
#include "ProjectionModel.h"
#include "Scene.h"
#include "gui/QSceneViewerWindow.h"

using namespace projection;
using namespace gmtl;

QSceneViewerWindow::QSceneViewerWindow(QWidget* pParent, const QGLWidget* pSharedWidget, Qt::WFlags flags) :
    QGLViewerWidget(pParent, pSharedWidget, flags|Qt::Window)
{
    m_pModel = NULL;

    setWindowTitle("Scene Viewer");
    setFocusPolicy(Qt::StrongFocus);
    resize(640, 480);
}

void QSceneViewerWindow::setModel(ProjectionModel* pModel)
{
    m_pModel = pModel;
    setView(m_pModel->getScene()->getCameraCenter(), m_pModel->getScene()->getCameraRotation(), m_pModel->getScene()->getCameraDistance());
    connect(this, SIGNAL(cameraChanged(const gmtl::Vec3f&, const gmtl::Quatf&, float)),
            m_pModel->getScene(), SLOT(setCameraViewpoint(const gmtl::Vec3f&, const gmtl::Quatf&, float)));
}

void QSceneViewerWindow::init()
{
}

void QSceneViewerWindow::draw()
{
    if (m_pModel)
    {
        m_pModel->setRenderContext(this);
        m_pModel->getScene()->draw();

        m_bGridVisible = m_pModel->getScene()->getShowGrid();
        m_gridSize = m_pModel->getScene()->getGridSize();
    }
}

void QSceneViewerWindow::resetCamera()
{
    setView(Vec3f(0.0f, 0.0f, 0.0f), Quatf(), 0.00001f);
    updateGL();
}

void QSceneViewerWindow::keyReleaseEvent(QKeyEvent* pEvent)
{
    QGLViewerWidget::keyReleaseEvent(pEvent);

    static bool bFullScreen = false;
    switch (pEvent->key())
    {
    case Qt::Key_Return:
        if (pEvent->modifiers() & Qt::AltModifier)
        {
            if (!bFullScreen) {
                showFullScreen();
                bFullScreen = true;
            } else {
                showNormal();
                bFullScreen = false;
            }
        }
        break;
    default:
        return;
    }
}

void QSceneViewerWindow::initFromDOMElement(const QDomElement& element)
{
    if (element.isNull())
        return;

    QGLViewerWidget::initFromDOMElement(element);

    if (element.attribute("show")=="true")
        show();
    else
        hide();
}

QDomElement QSceneViewerWindow::domElement(const QString& name, QDomDocument& doc) const
{
    QDomElement de = QGLViewerWidget::domElement(name, doc);
    if (isVisible())
        de.setAttribute("show", "true");
    else
        de.setAttribute("show", "false");
    return de;
}