OGLDraw.h

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// ======================================================================
//  OGLDraw.h
// ======================================================================
//                   This file is a part of the book 
//             "Qt 5.10 Professional programming with C++"
//                       http://qt-book.com
// ======================================================================
//  Copyright (c) 2017 by Max Schlee
// ======================================================================

#pragma once

#include <QOpenGLWidget>

// ======================================================================
class OGLDraw : public QOpenGLWidget {
protected:
    virtual void initializeGL(                       );
    virtual void resizeGL    (int nWidth, int nHeight);
    virtual void paintGL     (                       );

public:
    OGLDraw(QWidget* pwgt = 0);

    void draw(int xOffset, int yOffset, GLenum type);
};