#include <QtWidgets>

class MyWidget : public QWidget
{
public:
    MyWidget(QWidget *parent = 0) : QWidget(parent)
    {
		auto shortcut = new QShortcut(QKeySequence(Qt::Key_Backspace), this);
		connect(shortcut,
				&QShortcut::activated,
				[this]()
				{
		            qDebug() << "Shortcut activated";
				});
	}
};

int main(int argc, char **argv)
{
    QApplication a(argc, argv);
    MyWidget w;
    w.show();
    return a.exec();
}