26     this->
opacityAnimation = 
new QPropertyAnimation(
this, QByteArrayLiteral(
"opacity"), 
this);
 
   42     QGraphicsItemGroup::hoverEnterEvent(event);
 
   48     QGraphicsItemGroup::hoverLeaveEvent(event);
 
   61     painter->setPen(Qt::NoPen);
 
   62     painter->setBrush(QBrush(QColor(0xFF, 0xE2, 0x82)));
 
   63     painter->drawRect(childrenBoundingRect());
 
   66     QGraphicsItemGroup::paint(painter, option, widget);