Item.h:

Qt Code: 
  1. class Item:public QGraphicsRectItem
  2. {
  3. public:
  4.     Item(const QRectF & rect, QGraphicsItem * parent = 0);
  5.     void mousePressEvent(QGraphicsSceneMouseEvent * event);
  6.     void ​mouseMoveEvent(QGraphicsSceneMouseEvent * event);
  7.     void ​mouseReleaseEvent(QGraphicsSceneMouseEvent * event);
  8.     ~Item();
  9. };
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Item.cpp:
Qt Code: 
  1. Item::Item(const QRectF & rect, QGraphicsItem * parent)
  2.     :QGraphicsRectItem(rect, parent)
  3. {
  4. }
  5.  
  6. void Item::mousePressEvent(QGraphicsSceneMouseEvent * event){
  7.     qDebug("press");
  8.     QGraphicsRectItem::mousePressEvent(event);
  9.     event->accept();
  10. }
  11. void Item::​mouseMoveEvent(QGraphicsSceneMouseEvent * event){
  12.     qDebug("move");
  13. }
  14.  
  15. Item::~Item(){}
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main.cpp:
Qt Code: 
  1. #include <QApplication>
  2. #include "QGraphicsView"
  3. #include "QGraphicsScene"
  4. #include "item.h"
  5.  
  6. int main(int argc, char *argv[])
  7. {
  8.     QApplication a(argc, argv);
  9.  //   MainWindow w;
  10.  //   w.show();
  11.  
  12.     auto item = new Item(QRectF(0,0,100,100));
  13.  
  14.     auto scene = new QGraphicsScene;
  15.     scene->addItem(item);
  16.  
  17.     auto view = new QGraphicsView(scene);
  18.     view->show();
  19.  
  20.     return a.exec();
  21. }
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I have already explicitly call accept() after calling the base class implementation in the mousePressEvent(). But it doesn't work