Avoid MainWindow from closing

[KillGabio]

Hi guys, I`ve reading the documentation with no luck...

I have a MainWindow with a menuBar and only one QToolButton that closes the mainWindow (as a result the application)..The thing is that when the spacebar is pressed within the mainWindow context, as the close button is the only one there, it triggers closing the application. So far I have this code but it seems that it is not intercepting the signal of the spacebar:

void MainWindow::keyPressEvent (QKeyEvent *event){
    if (event == new QKeyEvent (QEvent::KeyPress, 20,0)){
        event->ignore ();
    }
    else{
        event->accept ();
    }
}

void MainWindow::keyPressEvent (QKeyEvent *event){
    if (event == new QKeyEvent (QEvent::KeyPress, 20,0)){
        event->ignore ();
    }
    else{
        event->accept ();
    }
}

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Thanks in advance!

[AlexSudnik]

QToolButton button ;
 
button.setFocusPolicy( Qt::ClickFocus ) ; // explicitly set widget's focus policy : " the widget accepts focus by clicking. ". Look at the QWidget::setFocusPolicy function description

QToolButton button ;

button.setFocusPolicy( Qt::ClickFocus ) ; // explicitly set widget's focus policy : " the widget accepts focus by clicking. ". Look at the QWidget::setFocusPolicy function description

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[KillGabio]

Thanks Alex