Custom Proxy Example

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 #ifndef VARIANTDATASET_H
 #define VARIANTDATASET_H

 #include <QtCore/QScopedPointer>
 #include <QtCore/QVariantList>

 typedef QVariantList VariantDataItem;
 typedef QList<VariantDataItem *> VariantDataItemList;

 class VariantDataSet : public QObject
 {
     Q_OBJECT

 public:
     explicit VariantDataSet();
     ~VariantDataSet();

     void clear();

     int addItem(VariantDataItem *item);
     int addItems(VariantDataItemList *itemList);

     const VariantDataItemList &itemList() const;

 Q_SIGNALS:
     void itemsAdded(int index, int count);
     void dataCleared();

 private:
     VariantDataItemList m_variantData;

     Q_DISABLE_COPY(VariantDataSet)
 };

 #endif