/*!
 * \file tspmodel.h
 * \author Copyright &copy; 2007-2010 Lёppa <contacts[at]oleksii[dot]name>
 *
 *  $Id: tspmodel.h 87 2010-01-12 14:11:24Z laleppa $
 *  $URL: https://tspsg.svn.sourceforge.net/svnroot/tspsg/trunk/src/tspmodel.h $
 *
 * \brief Defines CTSPModel class.
 *
 *  <b>TSPSG: TSP Solver and Generator</b>
 *
 *  This file is part of TSPSG.
 *
 *  TSPSG is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  TSPSG is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with TSPSG.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef TSPMODEL_H
#define TSPMODEL_H

#include "globals.h"

/*!
 * \brief This class implements table model for manipulating a task.
 * \author Copyright &copy; 2007-2010 Lёppa <contacts[at]oleksii[dot]name>
 */
class CTSPModel: public QAbstractTableModel
{
	Q_OBJECT

public:
	CTSPModel(QObject *parent = 0);
	void clear();
	int columnCount(const QModelIndex &parent = QModelIndex()) const;
	QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
	Qt::ItemFlags flags(const QModelIndex &index) const;
	QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
	bool loadTask(const QString &fname);
	quint16 numCities() const;
	void randomize();
	int rowCount(const QModelIndex &parent = QModelIndex()) const;
	bool saveTask(const QString &fname);
	bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole);
	void setNumCities(int n);

signals:
	/*!
	 * \brief This signal is emitted whenever the number of cities in the task changes.
	 *
	 * \sa setNumCities()
	 */
	void numCitiesChanged(int);

private:
	QSettings *settings;
	QVector<QVector<qreal> > table;
	quint16 nCities;
	bool loadError(QDataStream::Status);
	bool loadTSPT(QDataStream *);
	bool loadZKT(QDataStream *);
	qreal rand(int, int) const;
};

#endif // TSPMODEL_H