Legend.h

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/***************************************************************************
    File                 : Legend.h
    Project              : SciDAVis
    --------------------------------------------------------------------
    Copyright            : (C) 2006 by Ion Vasilief, Tilman Benkert
    Email (use @ for *)  : ion_vasilief*yahoo.fr, thzs*gmx.net
    Description          : Legend 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 LEGENDMARKER_H
#define LEGENDMARKER_H

#include <qfont.h>
#include <qpen.h>

#include <qwt_plot.h>
#include <qwt_array.h>
#include <qwt_text.h>

#include "Graph.h"
#include "Plot.h"
#include "PlotEnrichement.h"

class Legend: public PlotEnrichement
{
public:
    Legend(Plot *);
    ~Legend();

    enum FrameStyle{None = 0, Line = 1, Shadow=2};

    QString text(){return d_text->text();};
    void setText(const QString& s);

    QRect rect() const;
    virtual QwtDoubleRect boundingRect() const;

    void setOrigin(const QPoint & p);

    void setOriginCoord(double x, double y);

    void updateOrigin();

    QColor textColor(){return d_text->color();};
    void setTextColor(const QColor& c);

    QColor backgroundColor(){return d_text->backgroundBrush().color();};
    void setBackgroundColor(const QColor& c);

    int frameStyle(){return d_frame;};
    void setFrameStyle(int style);

    QFont font(){return d_text->font();};
    void setFont(const QFont& font);

    int angle(){return d_angle;};
    void setAngle(int ang){d_angle=ang;};

private:
    void draw(QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &r) const;

    void drawFrame(QPainter *p, int type, const QRect& rect) const;
    void drawSymbols(QPainter *p, const QRect& rect,
                    QwtArray<long> height, int symbolLineLength) const;
    void drawLegends(QPainter *p, const QRect& rect,
                    QwtArray<long> height, int symbolLineLength) const;
    void drawVector(QPainter *p, int x, int y, int l, int curveIndex) const;

    QwtArray<long> itemsHeight(int y, int symbolLineLength, int &width, int &height) const;
    int symbolsMaxLineLength() const;
    QString parse(const QString& str) const;

protected:
    Plot *d_plot;

    int d_frame;

    int d_angle;

    QwtText* d_text;

    QPoint d_pos;

    int hspace;

    int left_margin, top_margin;

        int d_shadow_size_x, d_shadow_size_y;
};

#endif