VectorCurve.h

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/***************************************************************************
    File                 : VectorCurve.h
    Project              : SciDAVis
    --------------------------------------------------------------------
    Copyright            : (C) 2006 by Ion Vasilief, Tilman Benkert
    Email (use @ for *)  : ion_vasilief*yahoo.fr, thzs*gmx.net
    Description          : Vector curve class

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

/***************************************************************************
 *                                                                         *
 *  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 VECTORCURVE_H
#define VECTORCURVE_H

#include "PlotCurve.h"
#include <qwt_plot.h>

class QwtPlot;

class VectorCurve: public DataCurve
{
public:
    enum VectorStyle{XYXY, XYAM};

    VectorCurve(VectorStyle style, Table *t, const QString& xColName, const char *name,
                const QString& endCol1, const QString& endCol2, int startRow, int endRow);
    ~VectorCurve();

    enum Position{Tail, Middle, Head};

    void copy(const VectorCurve *vc);

    QwtDoubleRect boundingRect() const;

    void draw(QPainter *painter,const QwtScaleMap &xMap,
        const QwtScaleMap &yMap, int from, int to) const;

    void drawVector(QPainter *painter, const QwtScaleMap &xMap,
        const QwtScaleMap &yMap, int from, int to) const;

    void drawArrowHead(QPainter *p, int xs, int ys, int xe, int ye) const;
    double theta(int x0, int y0, int x1, int y1) const;

    QString vectorEndXAColName(){return d_end_x_a;};
    QString vectorEndYMColName(){return d_end_y_m;};
    void setVectorEnd(const QString& xColName, const QString& yColName);
    void setVectorEnd(const QwtArray<double>&x, const QwtArray<double>&y);

    int width();
    void setWidth(int w);

    QColor color();
    void setColor(const QColor& c);

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

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

    bool filledArrowHead(){return filledArrow;};
    void fillArrowHead(bool fill);

    int position(){return d_position;};
    void setPosition(int pos){d_position = pos;};

    bool updateData(Table *t, const QString& colName);
    virtual bool loadData();

    QString plotAssociation();
    void updateColumnNames(const QString& oldName, const QString& newName, bool updateTableName);

protected:
    QwtArrayData *vectorEnd;
    QPen pen;
    bool filledArrow;
    int d_headLength, d_headAngle, d_position;

    QString d_end_x_a;
    QString d_end_y_m;
};

#endif