Hi,

I have this code:

Qt Code: 
  1. #include <QAbstractProxyModel>  #include <QMap>
  2.   class ImageLandmarkTableModel;
  3.   class ImageLandmarkProxyModel : public QAbstractProxyModel
  4.  {
  5.      Q_OBJECT
  6.  public:
  7.      ImageLandmarkProxyModel(QObject *parent=0);
  8.       virtual QModelIndex index(int row, int column,
  9.          const QModelIndex &parent=QModelIndex()) const;
  10.      virtual QModelIndex parent(const QModelIndex &index) const;
  11.      virtual int rowCount(const QModelIndex &parent=QModelIndex()) const;
  12.      virtual int columnCount(const QModelIndex &parent=QModelIndex()) const;
  13.      virtual QModelIndex mapToSource(const QModelIndex &proxyIndex) const;
  14.      virtual QModelIndex mapFromSource(const QModelIndex &sourceIndex) const;
  15.      virtual void setSourceModel(ImageLandmarkTableModel *sourceModel);
  16.      ImageLandmarkTableModel* sourceModel() const;
  17.      QVariant data(const QModelIndex &index, int role) const;
  18.  protected slots:
  19.      void countRowsInserted(const QModelIndex &parent, int srcStart, int srcEnd);
  20.      void countRowsRemoved(const QModelIndex &parent, int srcStart, int srcEnd);
  21.  private:
  22.      struct ProxyLink {
  23.          int sourceRow;        // Source row
  24.          QList<int> points;    // List of source rows from the childs
  25.      };
  26.       typedef QMap<int,ProxyLink> MappingData;
  27.       MappingData m_mapping;
  28.  };
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Qt Code: 
  1. #include "imagelandmarkproxymodel.h"  #include <QtSql>
  2.   #include "imagelandmarktablemodel.h"
  3.   ImageLandmarkProxyModel::ImageLandmarkProxyModel(QObject *parent)
  5.  {
  6.  }
  7.   QModelIndex ImageLandmarkProxyModel::index(int row, int column,
  8.      const QModelIndex &parent) const
  9.  {
  10.      if(!parent.isValid())    // Root
  11.          return createIndex(row, column);
  12.       int id=m_mapping.keys().at(parent.row());
  13.      const ProxyLink &link=m_mapping[id];
  14.       return createIndex(link.points.at(row), column);
  15.  }
  16.   QModelIndex ImageLandmarkProxyModel::parent(const QModelIndex &index) const
  17.  {
  18.      return QModelIndex();
  19.  }
  20.   int ImageLandmarkProxyModel::rowCount(const QModelIndex &parent) const
  21.  {
  22.      const MappingData &m=m_mapping;
  23.       if(parent.isValid())
  24.      {
  25.          bool ok;
  26.          int id=parent.data().toInt(&ok); Q_ASSERT(ok);
  27.           return m[id].points.count();
  28.      }
  29.      return m.count();
  30.  }
  31.   int ImageLandmarkProxyModel::columnCount(const QModelIndex &parent) const
  32.  {
  33.      return 1;
  34.  }
  35.   QModelIndex ImageLandmarkProxyModel::mapToSource(const QModelIndex &proxyIndex) const
  36.  {
  37.      QModelIndex parent=proxyIndex.parent();
  38.      if(parent.isValid()){
  39.          int parentRow=parent.row();
  40.          int id=m_mapping.keys().at(parentRow);
  41.          const QList<int> &points=m_mapping[id].points;
  42.           return sourceModel()->index(points.at(proxyIndex.row()), 1);
  43.      }
  44.      int row=proxyIndex.row();
  45.      int id=m_mapping.keys().at(row);
  46.      const ProxyLink &link=m_mapping[id];
  47.       return sourceModel()->index(link.sourceRow, 0);
  48.  }
  49.   QModelIndex ImageLandmarkProxyModel::mapFromSource(
  50.      const QModelIndex &sourceIndex) const
  51.  {
  52.      return index(sourceIndex.row(), sourceIndex.column());
  53.  }
  54.   void ImageLandmarkProxyModel::setSourceModel(
  55.      ImageLandmarkTableModel *sourceModel)
  56.  {
  57.      disconnect();
  58.       QAbstractProxyModel::setSourceModel(sourceModel);
  59.       connect(sourceModel, SIGNAL(rowsInserted(QModelIndex,int,int)),
  60.          SLOT(countRowsInserted(QModelIndex,int,int)));
  61.      connect(sourceModel, SIGNAL(rowsRemoved(QModelIndex,int,int)),
  62.          SLOT(countRowsRemoved(QModelIndex,int,int)));
  63.  }
  64.   ImageLandmarkTableModel* ImageLandmarkProxyModel::sourceModel() const
  65.  {
  67.       return static_cast<ImageLandmarkTableModel*>(ptr);
  68.  }
  69.   QVariant ImageLandmarkProxyModel::data(const QModelIndex &index, int role)
  70.      const
  71.  {
  72.      if(!index.isValid()) return QVariant();
  73.       QModelIndex parent=index.parent();
  74.       if(parent.isValid())
  75.      return mapToSource(index).data(role);
  76.  }
  77.   void ImageLandmarkProxyModel::countRowsInserted(const QModelIndex &parent,
  78.      int srcStart, int srcEnd)
  79.  {
  80.      const int idImageColumn=sourceModel()->column(
  81.          ImageLandmarkTableModel::IdImage);
  82.      const int idPointColumn=sourceModel()->column(
  83.          ImageLandmarkTableModel::IdPoint);
  84.      MappingData &m=m_mapping;
  85.       for(int i=srcStart;i<=srcEnd;i++)
  86.      {
  87.          QModelIndex col1=sourceModel()->index(i, idImageColumn);
  88.          QModelIndex col2=sourceModel()->index(i, idPointColumn);
  89.          bool ok;
  90.          int id=col1.data().toInt(&ok);
  91.          MappingData::iterator it=m.find(id);
  92.           Q_ASSERT(ok);
  93.          if(it!=m.end()) it->points.append(i);
  94.          else if(!col2.data().isNull()){
  95.              ProxyLink proxyLink;
  96.               proxyLink.sourceRow=i;
  97.              proxyLink.points.append(i);
  98.              m.insert(id, proxyLink);
  99.          }
  100.          else{
  101.              ProxyLink proxyLink;
  102.               proxyLink.sourceRow=i;
  103.              m.insert(id, proxyLink);
  104.          }
  105.      }
  106.  }
  107.   void ImageLandmarkProxyModel::countRowsRemoved(const QModelIndex &parent, int srcStart, int srcEnd)
  108.  {
  109.      // TODO: Do this slot
  110.      qCritical()<<"ImageLandmarkProxyModel::countRowsRemoved"<<"Unimplemented slot";
  111.  }
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I can't solve this problem, I think the childs are pointing to the parents or something else.
Someone can help me?