Hello forum,

I have loaded a database into a tree view as follows:

nodetree.png


I have a textfield above the tree view where the user types the text and the matched tree item name with the entered text gets highlighted. There will be no changes(addition / deletion) within the tree view except the matched item will be highlighted.

If the matched item is within the uncollapsed tree item , it will be collapsed and shown highlighted.

I tried to get it done by subclassing the sor filter proxy model , but i could not make it functional. I need more help on this issue.


Qt Code: 
  1. class H3DHighlighterProxyModel : public QSortFilterProxyModel
  2. {
  3. Q_OBJECT
  4. public:
  5.  
  6.     H3DHighlighterProxyModel(QObject *parent = 0);
  7.     ~H3DHighlighterProxyModel();
  8.  
  9. protected:
  10.  
  11.     virtual QVariant data(const QModelIndex &index, int role) const;
  12.  
  13. private:
  14.  
  15.     QVariant filterCheck(const QModelIndex&) const;
  16. };
  17.  
  18. QVariant H3DHighlighterProxyModel::data(const QModelIndex &index, int role) const
  19. {
  20.     //get  the handle to  the underlyiing data - map the model index to the source model index
  21. //    QModelIndex  sourceIndex = mapToSource(index);
  22.  
  23. //    //make sure that the model index is valid
  24. //    if(!sourceIndex.isValid())
  25. //    {
  26. //        return QVariant();
  27. //    }
  28.  
  29. //    if(role == Qt::BackgroundRole)
  30. //    {
  31. //        return filterCheck(sourceIndex);
  32. //    }
  33. //    else
  34. //    {
  35. //        return sourceIndex.data(role);
  36. //    }
  37.  
  38.     if(role == Qt::BackgroundRole)
  39.     {
  40.         QString text = QSortFilterProxyModel::data(index).toString();
  41.  
  42.         if(!filterRegExp().isEmpty())
  43.         {
  44.             if(text.contains(filterRegExp()))
  45.             {
  46.                 return QColor(Qt::lightGray);
  47.             }
  48.         }
  49.     }
  50.  
  51.     return QSortFilterProxyModel::data(index,role);
  52. }
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Any hint to sort it out?


Regards
Sajjad