I need to implement something like this...
Qt Code: 
  1. QVariant MsgStatsModel::data(const QModelIndex &index, int role) const
  2. {
  3.  
  4. 	QVariant ret;
  5.  
  6. 	if(!index.isValid()){
  7. 		std::cout <<"Invalid Index of data provided!"<< std::endl;
  8. 		return ret;
  9. 	}
  10.  
  11. 	int row = index.row();
  12. 	int col = index.column();
  13.  
  14. 	if(row >= 0 && row < rowCount()) {
  15. 		if(role == Qt::DisplayRole) {
  16. 			//get the OBJECT stored on "row"
  17. switch(col) {
  18. 				case 0 :
  19. 					ret = QVariant(/*HERE THE ID MUST BE RETURNED*/);
  20. 					break;
  21. 				case 1:
  22. 					ret = QVariant(/*HERE THE COUNT OF THE ID MUST BE RETURNED*/);;
  23. 					break;
  24. 			}
  25. 		}
  26. 	}
  27. 	return ret;
  28. }
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