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#ifndef FEATURETREEMODEL_H

#define FEATURETREEMODEL_H

#include <QAbstractItemModel>

#include <QMap>

#include <QHash>

#include <QTextStream>

QT_BEGIN_NAMESPACE

class Feature;

class Node;

uint qHash(const QModelIndex&);

class FeatureTreeModel : public QAbstractItemModel

{

    Q_OBJECT

public:

    FeatureTreeModel(QObject *parent = 0);

    ~FeatureTreeModel();

    void clear();

    QVariant data(const QModelIndex &index, int role) const;

    bool setData(const QModelIndex &index, const QVariant &value, int role);

    Qt::ItemFlags flags(const QModelIndex &index) const;

    QVariant headerData(int section, Qt::Orientation orientation,

                        int role = Qt::DisplayRole) const;

    QModelIndex index(int row, int column,

                      const QModelIndex &parent = QModelIndex()) const;

    QModelIndex index(const Feature *feature) const;    

    QModelIndex parent(const QModelIndex &index) const;

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

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

    void addFeature(Feature *feature);    

    Feature* getFeature(const QModelIndex &index) const;

    void readConfig(QTextStream &stream);

    void writeConfig(QTextStream &stream) const;

public slots:

    void featureChanged();

private:

    QModelIndex createIndex(int row, int column,

                            const QModelIndex &parent,

                            const Node *feature) const;    

    QModelIndex index(const QModelIndex &parent, const Feature *feature) const;

    bool contains(const QString &section, const Feature *f) const;

    Node* find(const QString &section, const Feature *f) const;

    QStringList findDisabled(const QModelIndex &parent) const;    

    QMap<QString, QList<Node*> > sections;

    mutable QHash<QModelIndex, QModelIndex> parentMap;

    mutable QHash<const Feature*, QModelIndex> featureIndexMap;    

};

QT_END_NAMESPACE

#endif // FEATURETREEMODEL_H