How to get mouse press events out from a QTableWidget which is part of another widget?

I am using event filter and installEventFilter method. But it can only get mousepress event when I click the very edge of the QTableWidget object.

The interesting thing is that the key-pressing events and wheel events are always caught by the code.

Anybody knows how to deal with this? Thanks!

Code is:
Qt Code: 
  1. //	install event filter for tablewidget
  2. 	tableWidget->installEventFilter(this);
  3.  
  4. bool AotfFilterGui::eventFilter( QObject *object, QEvent *event )
  5. {
  6. 	//	firstly, check whether the object is the QTableWidget and if it's a mouse press event
  7. 	if (object == tableWidget)
  8. 		if( event->type() == QEvent::MouseButtonPress)
  9. 		{	//	if yes, we need to cast the event into a QMouseEvent type
  10. 			QMouseEvent *pMouseEvent = static_cast<QMouseEvent *>(event);
  11. 			//	check whether it's mid button pressed
  12. 			/*if (pMouseEvent->button() == Qt::MidButton)
  13. 			{*/
  14. 				//do the processing and return true
  15. 				textBrowserErrorInfo->setText(tr("clicked"));
  16. 				return true;
  17. 			//}
  18. 		}
  19. 		else if (event->type() == QEvent::KeyPress) {
  20.              QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
  21. 			 textBrowserErrorInfo->setText(tr( "Ate key press: " + keyEvent->text()));
  22.              return true;
  23.          }
  24. 		return QWidget::eventFilter(object, event);
  25. }
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