React on KeyEvent inside QTreeWidget

[Spitfire]

You need to intercept key events going to the tree widget not the main window.

Event filter seems to be easiest solution in this case:

MainWindow::MainWindow( QWidget* parent )
    : QMainWindow( parent )
{
    [...] // your setup
 
    this->tree->installEventFilter( this );
}
 
bool    MainWindow::eventFilter( QObject* o, QEvent* e )
{
    if( o == this->tree && e->type() == QEvent::KeyRelease )
    {
        label->setText(tree->currentItem()->text(0));
    }
 
    return false;
}

MainWindow::MainWindow( QWidget* parent )
    : QMainWindow( parent )
{
    [...] // your setup

    this->tree->installEventFilter( this );
}

bool    MainWindow::eventFilter( QObject* o, QEvent* e )
{
    if( o == this->tree && e->type() == QEvent::KeyRelease )
    {
        label->setText(tree->currentItem()->text(0));
    }

    return false;
}

To copy to clipboard, switch view to plain text mode