1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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2 | * Qwt Widget Library
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3 | * Copyright (C) 1997 Josef Wilgen
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4 | * Copyright (C) 2002 Uwe Rathmann
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5 | *
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6 | * This library is free software; you can redistribute it and/or
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7 | * modify it under the terms of the Qwt License, Version 1.0
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8 | *****************************************************************************/
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9 |
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10 | #ifndef QWT_CURVE_FITTER_H
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11 | #define QWT_CURVE_FITTER_H
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12 |
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13 | #include "qwt_global.h"
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14 | #include "qwt_double_rect.h"
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15 |
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16 | class QwtSpline;
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17 |
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18 | #if QT_VERSION >= 0x040000
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19 | #include <QPolygonF>
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20 | #else
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21 | #include "qwt_array.h"
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22 | #endif
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23 |
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24 | // MOC_SKIP_BEGIN
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25 |
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26 | #if defined(QWT_TEMPLATEDLL)
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27 |
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28 | #if QT_VERSION < 0x040000
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29 | #ifndef QWTARRAY_TEMPLATE_QWTDOUBLEPOINT // by mjo3
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30 | #define QWTARRAY_TEMPLATE_QWTDOUBLEPOINT
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31 | template class QWT_EXPORT QwtArray<QwtDoublePoint>;
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32 | #endif //end of QWTARRAY_TEMPLATE_QWTDOUBLEPOINT
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33 | #endif
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34 |
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35 | #endif
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36 |
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37 | // MOC_SKIP_END
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38 |
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39 | /*!
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40 | \brief Abstract base class for a curve fitter
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41 | */
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42 | class QWT_EXPORT QwtCurveFitter
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43 | {
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44 | public:
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45 | virtual ~QwtCurveFitter();
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46 |
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47 | #if QT_VERSION < 0x040000
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48 | virtual QwtArray<QwtDoublePoint> fitCurve(
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49 | const QwtArray<QwtDoublePoint>&) const = 0;
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50 | #else
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51 | /*!
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52 | Find a curve which has the best fit to a series of data points
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53 |
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54 | \param polygon Series of data points
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55 | \return Curve points
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56 | */
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57 | virtual QPolygonF fitCurve(const QPolygonF &polygon) const = 0;
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58 | #endif
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59 |
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60 | protected:
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61 | QwtCurveFitter();
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62 |
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63 | private:
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64 | QwtCurveFitter( const QwtCurveFitter & );
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65 | QwtCurveFitter &operator=( const QwtCurveFitter & );
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66 | };
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67 |
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68 | /*!
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69 | \brief A curve fitter using cubic splines
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70 | */
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71 | class QWT_EXPORT QwtSplineCurveFitter: public QwtCurveFitter
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72 | {
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73 | public:
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74 | enum FitMode
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75 | {
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76 | Auto,
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77 | Spline,
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78 | ParametricSpline
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79 | };
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80 |
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81 | QwtSplineCurveFitter();
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82 | virtual ~QwtSplineCurveFitter();
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83 |
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84 | void setFitMode(FitMode);
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85 | FitMode fitMode() const;
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86 |
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87 | void setSpline(const QwtSpline&);
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88 | const QwtSpline &spline() const;
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89 | QwtSpline &spline();
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90 |
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91 | void setSplineSize(int size);
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92 | int splineSize() const;
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93 |
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94 | #if QT_VERSION < 0x040000
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95 | virtual QwtArray<QwtDoublePoint> fitCurve(
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96 | const QwtArray<QwtDoublePoint> &) const;
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97 | #else
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98 | virtual QPolygonF fitCurve(const QPolygonF &) const;
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99 | #endif
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100 |
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101 | private:
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102 | #if QT_VERSION < 0x040000
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103 | QwtArray<QwtDoublePoint> fitSpline(
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104 | const QwtArray<QwtDoublePoint> &) const;
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105 | QwtArray<QwtDoublePoint> fitParametric(
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106 | const QwtArray<QwtDoublePoint> &) const;
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107 | #else
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108 | QPolygonF fitSpline(const QPolygonF &) const;
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109 | QPolygonF fitParametric(const QPolygonF &) const;
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110 | #endif
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111 |
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112 | class PrivateData;
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113 | PrivateData *d_data;
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114 | };
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115 |
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116 | #endif
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