model.h Example File

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 #include <QAbstractListModel>
 #include <QStringList>

 class Animal
 {
 public:
     Animal(const QString &type, const QString &size);

     QString type() const;
     QString size() const;

 private:
     QString m_type;
     QString m_size;
 };

 class AnimalModel : public QAbstractListModel
 {
     Q_OBJECT
 public:
     enum AnimalRoles {
         TypeRole = Qt::UserRole + 1,
         SizeRole
     };

     AnimalModel(QObject *parent = 0);

     void addAnimal(const Animal &animal);

     int rowCount(const QModelIndex & parent = QModelIndex()) const;

     QVariant data(const QModelIndex & index, int role = Qt::DisplayRole) const;

 private:
     QList<Animal> m_animals;
 };