#include <QOpenGLFunctions>
#include <QWindow>

class QPainter;
class QOpenGLContext;
class QOpenGLPaintDevice;


class OpenGLWindow
	: public QWindow
	, protected QOpenGLFunctions {
	Q_OBJECT

public:
	explicit OpenGLWindow(QWindow * parent = nullptr);
	~OpenGLWindow();

	virtual void render(QPainter * painter);
	virtual void render();

	virtual void initialize();

	QOpenGLContext * context() { return m_context; }

public slots:
	void renderLater();
	void renderNow();

protected:
	bool event(QEvent * event) override;

	void exposeEvent(QExposeEvent * event) override;

private:
	QOpenGLContext * m_context;
	QOpenGLPaintDevice * m_device;
};