The graph drawn by QGLWidget is duplicated to other widget of itself.

[Fivestar]

I made two widgets on one window as above. They are child widget of QGLWidget such that

#ifndef MYGLWIDGET_H
#define MYGLWIDGET_H

#include <QGLWidget>
#include <QtSql>
#include "conndb.h"

class QWheelEvent;

class MyGLWidget : public QGLWidget
{
    Q_OBJECT
public:
    explicit MyGLWidget(QWidget *parent = 0);
    ~MyGLWidget();
....

As you seen the pictures, I draw a graph on A, not B. Then, if I do other actions like pressing other button or tab ley,... , then the graph in A is copied to B of itself. I don't know the reason of this phenomenum. Could you expain this?

Edit: Added code tags -- @Wieland

[A Former User]

Hi! Maybe the same bug as in this thread: https://forum.qt.io/topic/71826.