Hey, at first i must apologize for my poor english. I am new in Qt and seek for an solution of the follow issue. First my code:

Qt Code: 
  1. bool MainWindow::eventFilter(QObject *obj, QEvent *ev){
  2.     if((obj == ui->stackedWidget) && (ui->stackedWidget->currentIndex() == 1)){
  3.         if(ev->type() == QEvent::KeyPress)
  4.         {
  5.             QKeyEvent key = static_cast<QKeyEvent>(ev);
  6.             if(key.key() == Qt::Key_Control){
  7.  
  8.                 ui->stackedWidget->setCurrentIndex(0); 
  9.                 this-> tcpSocket->closeSocket();
  10.  
  11.             }
  12.  
  13.         }
  14.         else{
  15.             QPoint position = this->mapToGlobal(this->pos());
  16.             int x = position.x(); int y=position.y();
  17.             this->cursor().setPos((x/2)+175, (y/2)+175);
  18.         }
  19.  
  20.         return true;
  21.     }
  22.  
  23. }
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after my attempt to check wether control key was pressed, about a key event in this function, i received folllow error message:

Error: no matching function for call to 'QKeyEvent::QKeyEvent(QEvent*&)'
QKeyEvent key = static_cast<QKeyEvent>(ev);

somebody has an idea??