    /*

    Copyright (C) 2001 Stefan Westerfeld
                       stefan@space.twc.de

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
  
    This library 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
    Library General Public License for more details.
   
    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.

    */

#ifndef _KGRAPH_H
#define _KGRAPH_H

#include <tqwidget.h>
#include <tqpoint.h>
#include "artsgui.h"
#include <list>

namespace Arts {

class KGraphLine_impl;
class KGraph : public TQWidget
{
TQ_OBJECT
  

protected:
	std::list<KGraphLine_impl *> lines;
	float minx, maxx, miny, maxy;

	KGraphLine_impl *selectedLine;
	GraphPoint selectedPoint;
	int selectedIndex;	// -1 if nothing is selected

	inline GraphPoint q2gPoint(const TQPoint &qp);
	inline TQPoint g2qPoint(const GraphPoint &gp);
public:
	KGraph( TQWidget * parent = 0, const char * name = 0 );
	virtual ~KGraph();

	void addLine(Arts::KGraphLine_impl *line);
	void redrawLine(Arts::KGraphLine_impl *line);
	void removeLine(Arts::KGraphLine_impl *line);

	void mousePressEvent(TQMouseEvent *me);
	void mouseMoveEvent(TQMouseEvent *me);
	void mouseReleaseEvent(TQMouseEvent *me);

	void paintEvent(TQPaintEvent *e);
};
}

#endif /* KGRAPH_H */
