/usr/include/qwt-qt4/qwt_scale_map.h is in libqwt5-qt4-dev 5.2.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
* Qwt Widget Library
* Copyright (C) 1997 Josef Wilgen
* Copyright (C) 2002 Uwe Rathmann
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the Qwt License, Version 1.0
*****************************************************************************/
#ifndef QWT_SCALE_MAP_H
#define QWT_SCALE_MAP_H
#include "qwt_global.h"
#include "qwt_math.h"
/*!
\brief Operations for linear or logarithmic (base 10) transformations
*/
class QWT_EXPORT QwtScaleTransformation
{
public:
enum Type
{
Linear,
Log10,
Other
};
QwtScaleTransformation(Type type);
virtual ~QwtScaleTransformation();
virtual double xForm(double x, double s1, double s2,
double p1, double p2) const;
virtual double invXForm(double x, double p1, double p2,
double s1, double s2) const;
Type type() const;
virtual QwtScaleTransformation *copy() const;
private:
QwtScaleTransformation();
QwtScaleTransformation &operator=( const QwtScaleTransformation);
const Type d_type;
};
//! \return Transformation type
inline QwtScaleTransformation::Type QwtScaleTransformation::type() const
{
return d_type;
}
/*!
\brief A scale map
QwtScaleMap offers transformations from a scale
into a paint interval and vice versa.
*/
class QWT_EXPORT QwtScaleMap
{
public:
QwtScaleMap();
QwtScaleMap(const QwtScaleMap&);
~QwtScaleMap();
QwtScaleMap &operator=(const QwtScaleMap &);
void setTransformation(QwtScaleTransformation * );
const QwtScaleTransformation *transformation() const;
void setPaintInterval(int p1, int p2);
void setPaintXInterval(double p1, double p2);
void setScaleInterval(double s1, double s2);
int transform(double x) const;
double invTransform(double i) const;
double xTransform(double x) const;
double p1() const;
double p2() const;
double s1() const;
double s2() const;
double pDist() const;
double sDist() const;
QT_STATIC_CONST double LogMin;
QT_STATIC_CONST double LogMax;
private:
void newFactor();
double d_s1, d_s2; // scale interval boundaries
double d_p1, d_p2; // paint device interval boundaries
double d_cnv; // conversion factor
QwtScaleTransformation *d_transformation;
};
/*!
\return First border of the scale interval
*/
inline double QwtScaleMap::s1() const
{
return d_s1;
}
/*!
\return Second border of the scale interval
*/
inline double QwtScaleMap::s2() const
{
return d_s2;
}
/*!
\return First border of the paint interval
*/
inline double QwtScaleMap::p1() const
{
return d_p1;
}
/*!
\return Second border of the paint interval
*/
inline double QwtScaleMap::p2() const
{
return d_p2;
}
/*!
\return qwtAbs(p2() - p1())
*/
inline double QwtScaleMap::pDist() const
{
return qwtAbs(d_p2 - d_p1);
}
/*!
\return qwtAbs(s2() - s1())
*/
inline double QwtScaleMap::sDist() const
{
return qwtAbs(d_s2 - d_s1);
}
/*!
Transform a point related to the scale interval into an point
related to the interval of the paint device
\param s Value relative to the coordinates of the scale
*/
inline double QwtScaleMap::xTransform(double s) const
{
// try to inline code from QwtScaleTransformation
if ( d_transformation->type() == QwtScaleTransformation::Linear )
return d_p1 + (s - d_s1) * d_cnv;
if ( d_transformation->type() == QwtScaleTransformation::Log10 )
return d_p1 + log(s / d_s1) * d_cnv;
return d_transformation->xForm(s, d_s1, d_s2, d_p1, d_p2 );
}
/*!
Transform an paint device value into a value in the
interval of the scale.
\param p Value relative to the coordinates of the paint device
\sa transform()
*/
inline double QwtScaleMap::invTransform(double p) const
{
return d_transformation->invXForm(p, d_p1, d_p2, d_s1, d_s2 );
}
/*!
Transform a point related to the scale interval into an point
related to the interval of the paint device and round it to
an integer. (In Qt <= 3.x paint devices are integer based. )
\param s Value relative to the coordinates of the scale
\sa xTransform()
*/
inline int QwtScaleMap::transform(double s) const
{
return qRound(xTransform(s));
}
#endif
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