Qwt User's Guide 5.2.3

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