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# qwt_spline.h

    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_SPLINE_H
    00011 #define QWT_SPLINE_H
    00012
    00013 #include "qwt_global.h"
    00014 #include "qwt_double_rect.h"
    00015
    00016 #if QT_VERSION >= 0x040000
    00017 #include <QPolygonF>
    00018 #else
    00019 #include "qwt_array.h"
    00020 #endif
    00021
    00022 // MOC_SKIP_BEGIN
    00023
    00024 #if defined(QWT_TEMPLATEDLL)
    00025
    00026 #if QT_VERSION < 0x040000
    00027 #ifndef QWTARRAY_TEMPLATE_QWTDOUBLEPOINT // by mjo3
    00028 #define QWTARRAY_TEMPLATE_QWTDOUBLEPOINT
    00029 template class QWT_EXPORT QwtArray<QwtDoublePoint>;
    00030 #endif //end of QWTARRAY_TEMPLATE_QWTDOUBLEPOINT
    00031 #endif
    00032
    00033 #endif
    00034
    00035 // MOC_SKIP_END
    00036
    00077 class QWT_EXPORT QwtSpline
    00078 {
    00079 public:
    00081     enum SplineType
    00082     {
    00083         Natural,
    00084         Periodic
    00085     };
    00086
    00087     QwtSpline();
    00088     QwtSpline( const QwtSpline & );
    00089
    00090     ~QwtSpline();
    00091
    00092     QwtSpline &operator=( const QwtSpline & );
    00093
    00094     void setSplineType(SplineType);
    00095     SplineType splineType() const;
    00096
    00097 #if QT_VERSION < 0x040000
    00098     bool setPoints(const QwtArray<QwtDoublePoint>& points);
    00099     QwtArray<QwtDoublePoint> points() const;
    00100 #else
    00101     bool setPoints(const QPolygonF& points);
    00102     QPolygonF points() const;
    00103 #endif
    00104
    00105     void reset();
    00106
    00107     bool isValid() const;
    00108     double value(double x) const;
    00109
    00110     const QwtArray<double> &coefficientsA() const;
    00111     const QwtArray<double> &coefficientsB() const;
    00112     const QwtArray<double> &coefficientsC() const;
    00113
    00114 protected:
    00115
    00116 #if QT_VERSION < 0x040000
    00117     bool buildNaturalSpline(
    00118         const QwtArray<QwtDoublePoint> &);
    00119     bool buildPeriodicSpline(
    00120         const QwtArray<QwtDoublePoint> &);
    00121 #else
    00122     bool buildNaturalSpline(const QPolygonF &);
    00123     bool buildPeriodicSpline(const QPolygonF &);
    00124 #endif
    00125
    00126     class PrivateData;
    00127     PrivateData *d_data;
    00128 };
    00129
    00130 #endif