How to combine two QWidgets(tracking widget with console) & show them in QMainwindow

[liziyuanhaha]

My codes was derived from Qt example "Terminal".

I added another class "trackingWidget", and it works very well as an independent widget from QMainWindow, where the console stays.

Now I am trying to put my "trackingWidget" on the right side of console, and keep both of them inside QMainWindow; however, my "trackingWidget" disappeared.
Here is my code:

console = new Console;
    console ->setEnabled(false);
 
    QGridLayout *centralLayout = new QGridLayout;
    centralLayout->addWidget(console , 0,0,1,1);
    centralLayout->addWidget(trackingWidget, 0,1,1,1);
    trackingWidget->resize(512,512);
    console ->resize(325,512);
 
    QWidget *myCentralWidget = new QWidget;
    myCentralWidget->setLayout(centralLayout);
    setCentralWidget(myCentralWidget);

console = new Console;
    console ->setEnabled(false);

    QGridLayout *centralLayout = new QGridLayout;
    centralLayout->addWidget(console , 0,0,1,1);
    centralLayout->addWidget(trackingWidget, 0,1,1,1);
    trackingWidget->resize(512,512);
    console ->resize(325,512);

    QWidget *myCentralWidget = new QWidget;
    myCentralWidget->setLayout(centralLayout);
    setCentralWidget(myCentralWidget);

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It is ok if I just add trackingWidget; however, once I add console, the trackingWidget would be crushed to nowhere like it has never been added.

Is it possible to show multi-QWidgets with flexible sizes in one QWidget/QMainWindow?

Thanks!