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Graph.h

/* Graph.h
 *
 * Copyright (C) 2003 -- Sebastian Nowozin, Marco Kunze
 *
 * Generic function charting widget. Can show multiple functions.
 */

#ifndef GRAPH_H
#define GRAPH_H

#include <vector>

#include <qwidget.h>
#include <qpainter.h>
#include <qsize.h>
#include <qcolor.h>

using namespace std;

enum GraphDisplayType { GUndefined, BarchartPositive, Barchart,
        Waveform, Function };

class
Graph : public QWidget
{
        Q_OBJECT

public:

        Graph (QWidget *parent = 0, const char *name = 0);

        ~Graph (void);

        void setTitle (const char *title);

        void setDescriptions (const vector<const char *>& desc);

        void setDisplayType (GraphDisplayType type);

        void clear (void);

        void setValues (const vector<vector <double> >& plots);

        void addValue (const vector<double>& plotitem);

        void setDisplaySize (unsigned int display_size);

        unsigned int getDisplaySize (void) const;

        void setColor (const QColor& col);

        void setColor (const vector<QColor>& colors);

        void setMax (const double maximum)
        {
                max = maximum;
        }

        void setMargins (unsigned int margin_bars = 2,
                unsigned int margin_left = 4, unsigned int margin_right = 4,
                unsigned int margin_up = 4, unsigned int margin_down = 4);

public slots:
        /* no slots needed? */

protected:
        void paintEvent (QPaintEvent *ev);

private:
        GraphDisplayType                type;

        double                          max;

        vector<vector <double> >        plots;

        vector<QColor>          colors;

        vector<const char *>    desc;

        const char *    title;

        unsigned int    display_size;

        QPainter *      painter;

        void plotFunction (const vector<double>& plot, const QColor& col,
                const vector<const char *>& desc);

        const QColor& selectColor (const unsigned int idx) const;

        unsigned int margin_left;
        unsigned int margin_right;
        unsigned int margin_down;
        unsigned int margin_up;
        unsigned int margin_bars;
};

#endif

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