www.pudn.com > chap05.rar > plotter.h

#ifndef PLOTTER_H 
#define PLOTTER_H 
 
#include  
#include  
#include  
#include  
 
class QToolButton; 
class PlotSettings; 
 
class Plotter : public QWidget 
{ 
    Q_OBJECT 
 
public: 
    Plotter(QWidget *parent = 0); 
 
    void setPlotSettings(const PlotSettings &settings); 
    void setCurveData(int id, const QVector &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 > curveMap; 
    QVector 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