/*
    This file is part of Rocs.
    Copyright (C) 2011 Andreas Cord-Landwehr <cola@uni-paderborn.de>

    This program 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 2 of
    the License, or (at your option) any later version.

    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef TRANSFORMEDGESWIDGET_H
#define TRANSFORMEDGESWIDGET_H

#include <QWidget>
#include <KDialog>

#include "CoreTypes.h"


class QGridLayout;
class Document;
class DataStructure;

namespace Ui
{
class TransformEdgesWidget;
}

class TransformEdgesWidget :
    public KDialog
{
    Q_OBJECT


public:
    explicit TransformEdgesWidget(Document* graphDoc, QWidget *parent = 0);
    ~TransformEdgesWidget();

    /**
     * Add data structures to QComboBox of UI starting at position 0. Take care that
     * the data structure IDs must be given in increasing ID order without gaps.
     * Only data structures of documents of data structure type "Graph" are used.
     *
     * \param   QStringList dsNames names of data structures
     * \return  void
     */
    void addDataStructures(QStringList dsNames);

public slots:
    void executeTransform();

private:
    /**
     * Transform a given graph data structure to a complete graph.
     *
     * \param   DataStructure*  graph   the to be transformed graph
     */
    void makeComplete(DataStructurePtr graph);

    /**
     * Remove all edges from a given graph data structure.
     *
     * \param   DataStructure*  graph   the to be transformed graph
     * \return  void
     */
    void removeAllEdges(DataStructurePtr graph);

    /**
     * Remove all edges of a given directed graph data structure. If an undirected
     * data structure is given no transformations are proceed.
     *
     * \param   DataStructure*  graph   the to be transformed graph
     * \return  void
     */
    void reverseAllEdges(DataStructurePtr graph);

    /**
     * Transform given graph to a spanning tree by executing Prim's minimum spanning tree (MST)
     * algorithm. All edges are assumed to have weight 1 if no weights are given. Otherwise,
     * with given weights the specified values are used.
     *
     * \param   DataStructure*  graph   the to be transformed graph
     * \return  qreal   total weight of MST
     */
    qreal makeSpanningTree(DataStructurePtr graph);


    Document* graphDoc_;
    Ui::TransformEdgesWidget *ui;
};

#endif // TRANSFORMEDGESWIDGET_H
