I have created my own QListModel through deriving from QAbstractListModel.

MZ_NoteListModel.h
Qt Code: 
  1. #ifndef MZ_NOTELISTMODEL
  2. #define MZ_NOTELISTMODEL
  3.  
  4.  
  5. #include <QAbstractListModel>
  6. #include <QObject>
  7.  
  8. class MZ_NoteListModel : public QAbstractListModel
  9. {
  10.     public:
  11.         MZ_NoteListModel(QObject *parent = NULL);
  12.         QVariant headerData(int section, Qt::Orientation orientation, int role) const ;
  13.         int rowCount ( const QModelIndex & parent = QModelIndex() ) const ; 
  14.         QVariant data ( const QModelIndex & index, int role = Qt::DisplayRole ) const ; 
  15.         Qt::ItemFlags flags ( const QModelIndex & index ) const ;
  16.         bool setData ( const QModelIndex & index, const QMap<int, QVariant> & roles ) ;
  17.         QMap<int, QVariant> itemData ( const QModelIndex & index ) const ;
  18.  
  19.     private:
  20. };
  21.  
  22. #endif
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Qt Code: 
  1. #include "mz_noteListModel.h"
  2. #include <QDebug>
  3.  
  4. MZ_NoteListModel::MZ_NoteListModel(QObject *parent) : QAbstractListModel(parent)
  5. {
  6.  
  7. }
  8.  
  9. QVariant MZ_NoteListModel::headerData(int section, Qt::Orientation orientation, int role) const
  10. {
  11.     if (orientation == Qt::Horizontal)
  12.     {
  13.         if (role == Qt::DisplayRole)
  14.         {
  15.             return QString("Notes");
  16.         }
  17.     }
  18.     return QVariant();
  19. }
  20.  
  21. int MZ_NoteListModel::rowCount ( const QModelIndex & parent ) const
  22. {
  23.     return 3;
  24. } 
  25.  
  26.  
  27. QVariant MZ_NoteListModel::data ( const QModelIndex & index, int role ) const
  28. {
  29.     if(index.isValid())
  30.     {
  31.         switch(index.row())
  32.         {
  33.             case 0: 
  34.                 return QString("0"); 
  35.             break;
  36.             case 1:
  37.                 return QString("1");
  38.             break;
  39.             case 2:
  40.                 return QString("2");
  41.                 break;
  42.             default: return QVariant(); break;
  43.         }
  44.     }
  45.     return QVariant();
  46. } 
  47.  
  48. bool MZ_NoteListModel::setData ( const QModelIndex & index, const QMap<int, QVariant> & roles ) 
  49. {
  50.     if( index.isValid() )
  51.     {
  52.         return true;
  53.     }
  54.     return false;
  55. }
  56.  
  57. Qt::ItemFlags MZ_NoteListModel::flags ( const QModelIndex & index ) const
  58. {
  59.     if(index.isValid())
  60.     {   
  61.          return Qt::ItemIsEditable;
  62.     }
  63.     return 0;
  64. }
  65.  
  66. QMap<int, QVariant> MZ_NoteListModel::itemData ( const QModelIndex & index ) const
  67. {
  68.     QMap<int, QVariant> role; 
  69.     if(index.isValid())
  70.     {
  71.         role[index.row()] = Qt::DisplayRole;
  72.     }
  73.     return role;
  74. }
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My Problem is, when I make a QListView and set the model to my MZ_NoteListModel, the View is only white. Nothing, no header, no rows, nothing!!

Qt Code: 
  1. #include <iostream>
  2. #include <QListView>
  3. #include <QApplication>
  4.  
  5. #include "mz_noteListModel.h"
  6.  
  7. int main(int argc, char** argv)
  8. {
  9.     QApplication q(argc, argv);
  10.  
  11.     MZ_NoteListModel *noteModel = new MZ_NoteListModel();
  12.     QListView noteView;
  13.     noteView.setModel(noteModel);
  14.     noteView.show();
  15.  
  16.     return q.exec();
  17. }
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Please, can anybody help me?

Thanks