glwidget.h Example File

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#ifndef GLWIDGET_H
#define GLWIDGET_H

#include <QOpenGLWidget>
#include <QOpenGLFunctions>
#include <QOpenGLBuffer>

QT_FORWARD_DECLARE_CLASS(QOpenGLShaderProgram);
QT_FORWARD_DECLARE_CLASS(QOpenGLTexture)

class GLWidget : public QOpenGLWidget, protected QOpenGLFunctions
{
    Q_OBJECT

public:
    explicit GLWidget(QWidget *parent = 0);
    ~GLWidget();

    QSize minimumSizeHint() const override;
    QSize sizeHint() const override;
    void rotateBy(int xAngle, int yAngle, int zAngle);
    void setClearColor(const QColor &color);

signals:
    void clicked();

protected:
    void initializeGL() override;
    void paintGL() override;
    void resizeGL(int width, int height) override;
    void mousePressEvent(QMouseEvent *event) override;
    void mouseMoveEvent(QMouseEvent *event) override;
    void mouseReleaseEvent(QMouseEvent *event) override;

private:
    void makeObject();

    QColor clearColor;
    QPoint lastPos;
    int xRot;
    int yRot;
    int zRot;
    QOpenGLTexture *textures[6];
    QOpenGLShaderProgram *program;
    QOpenGLBuffer vbo;
};

#endif