[Qt - C++] Add-remove widget runtime

[MItaly]

In Qt normalmente questa cosa di solito viene gestita creando tutti i widget all'inizio dentro un QStackedWidget.

The QStackedWidget class provides a stack of widgets where only one widget is visible at a time.
[...]
QStackedWidget provides no intrinsic means for the user to switch page. This is typically done through a QComboBox or a QListWidget that stores the titles of the QStackedWidget's pages. For example:

    QComboBox *pageComboBox = new QComboBox;
    pageComboBox->addItem(tr("Page 1"));
    pageComboBox->addItem(tr("Page 2"));
    pageComboBox->addItem(tr("Page 3"));
    connect(pageComboBox, SIGNAL(activated(int)),
            stackedWidget, SLOT(setCurrentIndex(int)));

Il combobox si limiterà a cambiare il currentIndex del QStackedWidget.