ArrowMarker.h

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/***************************************************************************
    File                 : ArrowMarker.h
    Project              : SciDAVis
    --------------------------------------------------------------------
    Copyright            : (C) 2006 by Ion Vasilief
    Email (use @ for *)  : ion_vasilief*yahoo.fr
    Description          : Arrow marker (extension to QwtPlotMarker)

 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *  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, write to the Free Software           *
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor,                    *
 *   Boston, MA  02110-1301  USA                                           *
 *                                                                         *
 ***************************************************************************/
#ifndef ARROWMARKER_H
#define ARROWMARKER_H

#include "PlotEnrichement.h"

class ArrowMarker: public QObject, public PlotEnrichement
{
public:
    enum Operation { None, MoveStart, MoveEnd, MoveBoth };
    ArrowMarker();

    QPoint startPoint() const;
    void setStartPoint(const QPoint& p);

    QPoint endPoint() const;
    void setEndPoint(const QPoint& p);

    QwtDoublePoint startPointCoord();
    void setStartPoint(double x, double y);

    QwtDoublePoint endPointCoord();
    void setEndPoint(double x, double y);

    void setColor(const QColor& c);
    QColor color(){return linePen().color();};

    void setWidth(int w);
    int width(){return linePen().width();};

    void setStyle(Qt::PenStyle s);
    Qt::PenStyle style(){return linePen().style ();};

    void drawStartArrow(bool on = true){d_start_arrow = on;};
    bool hasStartArrow(){return d_start_arrow;};

    void drawEndArrow(bool on = true){d_end_arrow = on;};
    bool hasEndArrow(){return d_end_arrow;};

    int headLength(){return d_head_length;};
    void setHeadLength(int l);

    int headAngle(){return d_head_angle;};
    void setHeadAngle(int a);

    bool filledArrowHead(){return d_fill_head;};
    void fillArrowHead(bool fill = true);

    double dist(int x, int y);

    double length();

    QRect rect() const {return QRect(startPoint(), endPoint()).normalized();};

    QwtDoubleRect boundingRect() const;
    void setBoundingRect(double xs, double ys, double xe, double ye);

    void updateBoundingRect();

    bool editable() const { return d_editable; }
    void setEditable(bool yes);

    bool eventFilter(QObject *o, QEvent *e);

private:
    void draw(QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &r) const;
    double theta(int xs, int ys, int xe, int ye) const;

    bool d_start_arrow;

    bool d_end_arrow;

    bool d_fill_head;

    int d_head_angle;

    int d_head_length;

    QPoint d_start;

    QPoint d_end;

    QwtDoubleRect d_rect;
    bool d_editable;

    Operation d_op;

    QPoint d_op_startat;
};
#endif