Qwt User's Guide: qwt_curve_fitter.h Source File

00001 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
00002  * Qwt Widget Library
00003  * Copyright (C) 1997   Josef Wilgen
00004  * Copyright (C) 2002   Uwe Rathmann
00005  * 
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the Qwt License, Version 1.0
00008  *****************************************************************************/
00009 
00010 #ifndef QWT_CURVE_FITTER_H
00011 #define QWT_CURVE_FITTER_H
00012 
00013 #include "qwt_global.h"
00014 #include "qwt_double_rect.h"
00015 
00016 class QwtSpline;
00017 
00018 #if QT_VERSION >= 0x040000
00019 #include <QPolygonF>
00020 #else
00021 #include "qwt_array.h"
00022 #endif
00023 
00024 // MOC_SKIP_BEGIN
00025 
00026 #if defined(QWT_TEMPLATEDLL)
00027 
00028 #if QT_VERSION < 0x040000
00029 #ifndef QWTARRAY_TEMPLATE_QWTDOUBLEPOINT // by mjo3
00030 #define QWTARRAY_TEMPLATE_QWTDOUBLEPOINT
00031 template class QWT_EXPORT QwtArray<QwtDoublePoint>;
00032 #endif //end of QWTARRAY_TEMPLATE_QWTDOUBLEPOINT
00033 #endif
00034 
00035 #endif
00036 
00037 // MOC_SKIP_END
00038 
00042 class QWT_EXPORT QwtCurveFitter
00043 {
00044 public:
00045     virtual ~QwtCurveFitter();
00046 
00047 #if QT_VERSION < 0x040000
00048     virtual QwtArray<QwtDoublePoint> fitCurve(
00049         const QwtArray<QwtDoublePoint>&) const = 0;
00050 #else
00051     virtual QPolygonF fitCurve(const QPolygonF &) const = 0;
00052 #endif
00053 
00054 protected:
00055     QwtCurveFitter();
00056 
00057 private:
00058     QwtCurveFitter( const QwtCurveFitter & );
00059     QwtCurveFitter &operator=( const QwtCurveFitter & );
00060 };
00061 
00065 class QWT_EXPORT QwtSplineCurveFitter: public QwtCurveFitter
00066 {
00067 public:
00068     enum FitMode
00069     {
00070         Auto,
00071         Spline,
00072         ParametricSpline
00073     };
00074 
00075     QwtSplineCurveFitter();
00076     virtual ~QwtSplineCurveFitter();
00077 
00078     void setFitMode(FitMode);
00079     FitMode fitMode() const;
00080 
00081     void setSpline(const QwtSpline&);
00082     const QwtSpline &spline() const;
00083     QwtSpline &spline();
00084 
00085     void setSplineSize(int size);
00086     int splineSize() const;
00087 
00088 #if QT_VERSION < 0x040000
00089     virtual QwtArray<QwtDoublePoint> fitCurve(
00090         const QwtArray<QwtDoublePoint> &) const;
00091 #else
00092     virtual QPolygonF fitCurve(const QPolygonF &) const;
00093 #endif
00094 
00095 private:
00096 #if QT_VERSION < 0x040000
00097     QwtArray<QwtDoublePoint> fitSpline(
00098         const QwtArray<QwtDoublePoint> &) const;
00099     QwtArray<QwtDoublePoint> fitParametric(
00100         const QwtArray<QwtDoublePoint> &) const;
00101 #else
00102     QPolygonF fitSpline(const QPolygonF &) const;
00103     QPolygonF fitParametric(const QPolygonF &) const;
00104 #endif
00105     
00106     class PrivateData;
00107     PrivateData *d_data;
00108 };
00109 
00110 #endif