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i have a QstackedWidget and i add QHboxLayout and QVBoxLayout to it, in my vertical layout i add 3 QCheckBox, and i add this layout with two spacer for left and right side to it, then i push this new layout with two spacer for top and bottom in horizontal layout, now i want to check if this QCheckBoxes are checked or not, but i don't know how to check this. here is my code :

QVBoxLayout *center = new QVBoxLayout();
QVBoxLayout *main = new QVBoxLayout();
    QHBoxLayout *middle = new QHBoxLayout();

    QSpacerItem *topspacer = new QSpacerItem(14, 24, QSizePolicy::Fixed, QSizePolicy::Fixed);
    QSpacerItem *buttom = new QSpacerItem(4, 4, QSizePolicy::Expanding, QSizePolicy::Expanding);
    QSpacerItem *left = new QSpacerItem(4, 4, QSizePolicy::Expanding, QSizePolicy::Expanding);
    QSpacerItem *right = new QSpacerItem(4, 4, QSizePolicy::Expanding, QSizePolicy::Expanding);
    middle->addItem(left);
    middle->addLayout(center);
    middle->addItem(right);
    center->addWidget(checkBoxEvent(QString::fromStdString("Analyze events")));
    center->addWidget(checkBoxEvent(QString::fromStdString("Edit Tracks")));
    center->addWidget(checkBoxEvent(QString::fromStdString("Analyze players")));

main->addItem(topspacer);
    main->addLayout(middle);
    main->addItem(buttom);
Qwidget *m_page = new Qwidget();
    m_page->setLayout(main);
    m_stackedWidget->addWidget(m_page);

i tried this code for accessing to elements but i get segmentation fault:

 for(int i = 0; i < m_stackedWidget->widget(2)->layout()->count(); i++) 
   if(dynamic_cast<QPushButton*>( m_stackedWidget->widget(2)->layout()->itemAt(i) )->isChecked())

this items are added to m_stackedWidget[1]

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