// **************************************************************************
// File: plotter.hh
//
// Author:    Phil Gillaspy
//
// Last Modified: 04/18/2012
//
// Description:
//   This is the class which plots the GQ GMC's CPM data.
//
//   This code is virtually copied verbatim from the book "C++ GUI
//   Programming with Qt4.
//
//
// *************************************************************************

#ifndef PLOTTER_HH
#define PLOTTER_HH

#include <QMap>
#include <QPixmap>
#include <QVector>
#include <QWidget>

class QToolButton;
class PlotSettings;

class Plotter : public QWidget
{
    Q_OBJECT

public:
    Plotter(QWidget *parent = 0);

    void startSample(void);
    void setPlotSettings(const PlotSettings &settings);
    void setCurveData(int id, const QVector<QPointF> &data);
    void clearCurve(int id);
    QSize minimumSizeHint() const;
    QSize sizeHint() const;

    bool bScroll;

public slots:
    void zoomIn();
    void zoomOut();
    void timerEvent(QTimerEvent * event);

protected:
    void paintEvent(QPaintEvent *event);
    void resizeEvent(QResizeEvent *event);
    void mousePressEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);
    void keyPressEvent(QKeyEvent *event);
    void wheelEvent(QWheelEvent *event);

private:
    void updateRubberBandRegion();
    void refreshPixmap();
    void drawGrid(QPainter *painter);
    void drawCurves(QPainter *painter);

    enum { Margin = 50 };

    QToolButton *zoomInButton;
    QToolButton *zoomOutButton;
    QMap<int, QVector<QPointF> > curveMap;
    QVector<PlotSettings> zoomStack;
    int curZoom;
    bool rubberBandIsShown;
    QRect rubberBandRect;
    QPixmap pixmap;

    int myTimerID;
    int sampleCnt;
};

class PlotSettings
{
public:
    PlotSettings();

    void scroll(int dx, int dy);
    void adjust();
    double spanX() const { return maxX - minX; }
    double spanY() const { return maxY - minY; }

    double minX;
    double maxX;
    int numXTicks;
    double minY;
    double maxY;
    int numYTicks;

private:
    static void adjustAxis(double &min, double &max, int &numTicks);
};

#endif  // PLOTTER_HH