#ifndef PLOTTER_H#define PLOTTER_H#include <QMap>#include <QPixmap>#include <QVector>#include <QWidget>class QToolButton;class PlotSettings;class Plotter : public QWidget{    Q_OBJECTpublic:    Plotter(QWidget *parent = 0);    void setPlotSettings(const PlotSettings &settings);    void setCurveData(int id, const QVector<QPointF> &data);    void clearCurve(int id);    QSize minimumSizeHint() const;    QSize sizeHint() const;public slots:    void zoomIn();    void zoomOut();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;};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