#ifndef TREEMODEL_H

#define TREEMODEL_H

#include <QAbstractItemModel>

#include <QModelIndex>

#include <QVariant>

class BranchItem;

class TreeItem;

class Link;

class LinkableMapObj;

class TreeModel : public QAbstractItemModel

{

    Q_OBJECT

public:

    TreeModel(QObject *parent = 0);

    ~TreeModel();

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

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

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

                        int role = Qt::DisplayRole) const;

	QModelIndex index (TreeItem* ti);

    QModelIndex index(int row, int column,

                      const QModelIndex &parent = QModelIndex()) const;

    QModelIndex parent(const QModelIndex &index) const;

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

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

	BranchItem* nextBranch (BranchItem* &current, BranchItem* &previous, bool deepLevelsFirst=true, BranchItem* start=NULL);

	bool removeRows ( int row, int count, 

				const QModelIndex & parent = QModelIndex() ); 

	TreeItem* getItem (const QModelIndex &index) const;

	BranchItem* getRootItem();

protected:

    BranchItem *rootItem;

	QList <Link*> xlinks;

	QList <Link*> xlinks_obsolete;

};

#endif