keyPressEvent() not working for a tab within QTabWidget

I have a tab within a QTabWidget. I have a keyPressEvent() override defined in my class managing the tab but the key press events are not recognized (I have a cout call to verify that the function isn't even called).

I have tried activeWindow(), setFocusPolicy(QtFocusPolicy::StrongFocus), and setFocus() both on the tab and the widget itself, but that doesn't seem to help.

When I implement a keyPressEvent() on the main window widget containing the tab widget, it seems to work, but I'd rather do it on the individual tabs if possible.

Code for main window

Code:

QtPlotsMain::QtPlotsMain()
   : ui( new Ui::QtPlotsMain() ),
     help_ui( new Ui::Help()),
     help_dialog(new QDialog())
{
   //Setup plot
   ui->setupUi( this );
   tabWidget = new QTabWidget(ui->centralwidget);
   tabWidget->setObjectName(QString::fromUtf8("tabWidget"));
   tabWidget->setIconSize(QSize(16, 16));
   tabWidget->setTabsClosable(true);
   tabWidget->setMovable(true);
   QWidget * tab_2 = new QWidget();
 
   tabWidget->addTab(tab_2, "Altitude vs Time");
 
   ui->gridLayout->addWidget(tabWidget, 0, 0, 1, 1);
 
   shared_ptr<QtPlotsTab> alt_tab(make_shared<AltVsTimeTab>(tab_2));
   plot_objects.push_back(alt_tab);

Code for tab:

Code:

QtPlotsTab::QtPlotsTab(QWidget *tab_in,
                       const QString & title_in,
                       const QString & x_label_in,
                       const QString & y_label_in)
   :  map_src_curve(make_shared<SensorPlotCollection>())
{
   QGridLayout *gridLayout_2 = new QGridLayout(tab_in);
   //Setup plot
   plot = new QwtPlot(tab_in);
   gridLayout_2->addWidget(plot, 0, 0, 1, 1);
 
  // have tried a variety of things here
   activateWindow();
   setFocusPolicy(Qt::FocusPolicy::StrongFocus);
   setFocus();
 
}

Code:

void QtPlotsTab::keyPressEvent(QKeyEvent *e)
{
   cout << FILE_LINE << endl;
}