I have tried the installeventFilter as well, I am now pasting the code as I think it might be the problem with my code.
Here is my class:
Qt Code: 
  1. SelectableItem_C::SelectableItem_C(QWidget* parent) 
  2. {
  3.     	 _label_textedit = new QTextEdit(this);
  4.     _label_textedit->setFont(font);
  5.     _label_textedit->setAlignment(Qt::AlignCenter);
  6.     _label_textedit->setPaletteBackgroundColor(dark_background);
  7.     _label_textedit->setAutoFillBackground(true);
  8. 	_label_textedit->setFrameShape(QFrame::NoFrame);
  9. 	_label_textedit->setWordWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
  10. 	_label_textedit->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  11.     _label_textedit->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  12. 	_label_textedit->setTextInteractionFlags(Qt::NoTextInteraction);
  13.  
  14.  
  15. 	QSizePolicy sizePolicy(static_cast<QSizePolicy::Policy>(5), static_cast<QSizePolicy::Policy>(5));
  16.     sizePolicy.setHorizontalStretch(0);
  17.     sizePolicy.setVerticalStretch(0);
  18.     sizePolicy.setHeightForWidth(_label_textedit->sizePolicy().hasHeightForWidth());
  19.     _label_textedit->setSizePolicy(sizePolicy);
  20.  
  21. 	_label_textedit->viewport()->setCursor(Qt::ArrowCursor);
  22. 	_label_textedit->installEventFilter(this);
  23. 	_label_textedit->viewport()->setMouseTracking(true);
  24.  
  25. }
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and here is the event filter function in this class
Qt Code: 
  1. bool SelectableItem_C::eventFilter( QObject *obj, QEvent *ev )
  2.  {    
  3. 	 //printf("got in\n");    
  4. 	 if ( obj == _label_textedit )     
  5. 	 {    
  6. 		if ( ev->type() == QEvent::MouseButtonPress )    
  7. 		{        
  8. 			emit MousePressed_Signal(this);      
  9. 			return TRUE;    
  10. 		}     
  11. 	 }     
  12. 	 else     
  13. 	 {    
  14. 		 //printf("af: %d,%d\n",e->x(),e->y());        
  15. 		 // pass the event on to the parent class    
  16. 		 return QWidget::eventFilter( obj, ev );    
  17. 	 }
  18. 	 return TRUE;  
  19.  }
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I have defined a "MousePressed_Signal" which is doing the desired work.
I could not even come in to the "If condition" with my debugging.
One more thing is that I have overridden the functions "mousePressEvent" and "mouseDoubleClickEvent" for my class. I can see that control goes to the function "mouseDoubleClickEvent" when I double click on the QTextEdit control, but not when I just do a single click on the same QTextEdit ?