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#include <QWindow>

#include <QAnimationDriver>
#include <QBasicTimer>
#include <QSharedPointer>

class Item;
QT_FORWARD_DECLARE_CLASS(QSGAbstractRenderer)
QT_FORWARD_DECLARE_CLASS(QSGEngine)
QT_FORWARD_DECLARE_CLASS(QSGRootNode)
QT_FORWARD_DECLARE_CLASS(QSGTexture)

class Window : public QWindow
{
    Q_OBJECT
public:
    Window();
    ~Window();

    void addItems();
    void update();

private:
    void timerEvent(QTimerEvent *);
    void exposeEvent(QExposeEvent *);
    void mousePressEvent(QMouseEvent *);
    void keyPressEvent(QKeyEvent *);

    void sync();
    void render();
    void initialize();
    void invalidate();

    bool m_initialized;
    QScopedPointer<QOpenGLContext> m_context;
    QScopedPointer<QSGEngine> m_sgEngine;
    QScopedPointer<QSGRootNode> m_sgRootNode;
    QScopedPointer<QSGAbstractRenderer> m_sgRenderer;
    QScopedPointer<QSGTexture> m_smileTexture;
    QScopedPointer<QSGTexture> m_qtTexture;
    QList<QSharedPointer<Item> > m_items;

    QBasicTimer m_updateTimer;
    QAnimationDriver m_animationDriver;
};