9#include <QGraphicsLineItem> 
   74        QGraphicsLineItem * 
line1{
nullptr};
 
   75        QGraphicsLineItem * 
line2{
nullptr};
 
   80            QPen pen = 
line1->pen();
 
 
   87            line1->setLine(rect.x(), rect.y(),
 
   88                            rect.x() + rect.width(), rect.y() + rect.height());
 
 
   91            line2->setLine(rect.x(), rect.y() + rect.height(),
 
   92                            rect.x() + rect.width(), rect.y());