qt5base-lts/examples/opengl/textures/glwidget.h

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#ifndef GLWIDGET_H
#define GLWIDGET_H

#include <QtWidgets>
#include <QGLWidget>

QT_FORWARD_DECLARE_CLASS(QGLShaderProgram);

class GLWidget : public QGLWidget
{
    Q_OBJECT

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

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

signals:
    void clicked();

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

private:
    void makeObject();

    QColor clearColor;
    QPoint lastPos;
    int xRot;
    int yRot;
    int zRot;
    GLuint textures[6];
    QVector<QVector3D> vertices;
    QVector<QVector2D> texCoords;
#ifdef QT_OPENGL_ES_2
    QGLShaderProgram *program;
#endif
};

#endif