Listens for the escape key to cancel out from this snapshot.
        
        :param      event | <QKeyPressEvent>

def keyPressEvent(self, event):
        """
        Listens for the escape key to cancel out from this snapshot.
        
        :param      event | <QKeyPressEvent>
        """
        # reject on a cancel
        if event.key() == Qt.Key_Escape:
            self.reject()
        
        super(XSnapshotWidget, self).keyPressEvent(event)