How to add a widget into central Widget using code in Qt

Question

I need to add a widget to the form using code, but don't by use QHBoxLayout or QVBoxLayout.

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    fields[0] = new CustomLabel();
    fields[0]->setText("Hello");
    //how to show it  

}

Answer 1

You can simply use setCentralWidget()

documentation of setCentralWidget()

like this ui->setCentralWidget(fields[0]); or maybe with this replacing ui

But, to displayed many widget you have to use a widget that contains the matrix of labels (widget). When you have the parent widget that contain the matrix display it with setCentralWidget()