Quote Originally Posted by Lykurg View Post
Install the filter on the scene or view, not on the item.
Qt Code: 
  1. this->installEventFilter(this);
  2. //...
  3. return QGraphicsView::eventFilter(ob, e);
To copy to clipboard, switch view to plain text mode 
of course i try that one too ....

my full code
Qt Code: 
  1. RecRepView::RecRepView(QWidget *parent)
  2.          : QGraphicsView(parent)
  3. {
  4.  setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  5.         setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  6.         setFrameShape(QFrame::NoFrame);
  7.         setCacheMode(CacheBackground);
  8.         setViewportUpdateMode(FullViewportUpdate);
  9.         setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
  10.         setStyleSheet("background:#00002E");
  11.         QRectF bounds(0, -20, 700, 500);
  12.         scene = new QGraphicsScene(bounds, this);
  13.         setScene(scene);
  14.         this->installEventFilter(this);
  15.         signalMapper =  new QSignalMapper();
  16. int i =0;
  17.         mapValue[i] = STARTVALUE;
  18.         button1 = new GraphButton(QRectF(0,0, 150, 40), 1);
  19.         button1->setFlag(QGraphicsItem::ItemIsSelectable);
  20.         button1->setPos(475, 330);
  21.         scene->addItem(button1);
  22.         connect(button1, SIGNAL(activated()), signalMapper, SLOT(map()));
  23.         signalMapper->setMapping(button1,mapValue[i]);
  24.         i++;
  25.  
  26.  
  27.         mapValue[i] = STOPVALUE;
  28.         button2 = new GraphButton(QRectF(0,0, 150, 40), 2);
  29.         button2->setFlag(QGraphicsItem::ItemIsSelectable);
  30.         button2->setPos(475, 400);
  31.         scene->addItem(button2);
  32.         connect(button2, SIGNAL(activated()), signalMapper, SLOT(map()));
  33.         signalMapper->setMapping(button2,mapValue[i]);
  34.  
  35.         logout = new BackItem(QRectF(0, 0, 70, 65));
  36.         logout->setPos(20, 405);
  37.         logout->setFlag(QGraphicsItem::ItemIsSelectable);
  38. //      log connect(logout, SIGNAL(closeSignal()), qApp, SLOT(quit()));
  39.         scene->addItem(logout);
  40.  
  41.         connect(signalMapper, SIGNAL(mapped(int )), this, SIGNAL(activated(int)));
  42.  
  43.         connect(this, SIGNAL(activated(int )), this, SLOT(recRepSlot(int )));
  44.  
  45. }
  46.  
  47. void RecRepView ::resizeEvent(QResizeEvent *event)
  48. {
  49.         QGraphicsView::resizeEvent(event);
  50.         fitInView(scene->sceneRect(), Qt::KeepAspectRatio);
  51. }
  52.  
  53. void RecRepView::drawBackground(QPainter *painter, const QRectF &rect)
  54. {
  55.         Q_UNUSED(rect);
  56.  
  57.         QRectF rects(450,310, 200, 160);
  58.         QPen pen(QColor(211, 210, 212), 0.5);
  59.         painter->setBrush(QColor(128, 128, 128));
  60.         painter->setPen(pen);
  61.         painter->drawRect(rects);
  62.  
  63. }bool RecRepView:: eventFilter(QObject *ob, QEvent *e)
  64. {
  65.         if(ob == logout && e->type() == QEvent::KeyPress) {
  66.                 const QKeyEvent *ke = static_cast<QKeyEvent *>(e);
  67.                 if(ke->key()==Qt::Key_F1){
  68.                         printf("is it coming inside ..\n");
  69.  
  70.                 }
  71.                 return true;
  72.         }
  73.          return QWidget::eventFilter(ob, e);
  74. }
  75. void RecRepView::recRepSlot(int value)
  76. {
  77.         printf("the value coming inside :%d \n", value);
  78.  
  79. }
To copy to clipboard, switch view to plain text mode 

Qt Code: 
  1. GraphButton::GraphButton(const QRectF &rect, int itemNo)
  3. {
  4. }
  5.  
  6. void GraphButton::mousePressEvent(QGraphicsSceneMouseEvent *event)
  7. {
  8.         if(event->button() != Qt::LeftButton)
  9.         {
  10.                 QGraphicsRectItem::mousePressEvent(event);
  11.                 return;
  12.         }
  13.         emit activated();
  14. }
To copy to clipboard, switch view to plain text mode 

please help ....