qt5base-lts/examples/opengl/qopenglwidget/mainwindow.h

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#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QTimer>
#include <QGridLayout>

QT_FORWARD_DECLARE_CLASS(QOpenGLWidget)

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow();
    void addNew();
    bool timerEnabled() const { return m_timer->isActive(); }

private slots:
    void updateIntervalChanged(int value);
    void timerUsageChanged(bool enabled);

private:
    QTimer *m_timer;
    QGridLayout *m_layout;
    int m_nextX;
    int m_nextY;
    QVector<QOpenGLWidget *> m_glWidgets;
};

#endif