/usr/include/qwt/qwt_scale_map.h is in libqwt-headers 6.1.2-5.
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 | /* -*- 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_transform.h"
#include <qrect.h>
#ifndef QT_NO_DEBUG_STREAM
#include <qdebug.h>
#endif
class QRectF;
/*!
\brief A scale map
QwtScaleMap offers transformations from the coordinate system
of a scale into the linear coordinate system of a paint device
and vice versa.
*/
class QWT_EXPORT QwtScaleMap
{
public:
QwtScaleMap();
QwtScaleMap( const QwtScaleMap& );
~QwtScaleMap();
QwtScaleMap &operator=( const QwtScaleMap & );
void setTransformation( QwtTransform * );
const QwtTransform *transformation() const;
void setPaintInterval( double p1, double p2 );
void setScaleInterval( double s1, double s2 );
double transform( double s ) const;
double invTransform( double p ) const;
double p1() const;
double p2() const;
double s1() const;
double s2() const;
double pDist() const;
double sDist() const;
static QRectF transform( const QwtScaleMap &,
const QwtScaleMap &, const QRectF & );
static QRectF invTransform( const QwtScaleMap &,
const QwtScaleMap &, const QRectF & );
static QPointF transform( const QwtScaleMap &,
const QwtScaleMap &, const QPointF & );
static QPointF invTransform( const QwtScaleMap &,
const QwtScaleMap &, const QPointF & );
bool isInverting() const;
private:
void updateFactor();
double d_s1, d_s2; // scale interval boundaries
double d_p1, d_p2; // paint device interval boundaries
double d_cnv; // conversion factor
double d_ts1;
QwtTransform *d_transform;
};
/*!
\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 qAbs( d_p2 - d_p1 );
}
/*!
\return qwtAbs(s2() - s1())
*/
inline double QwtScaleMap::sDist() const
{
return qAbs( 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
\return Transformed value
\sa invTransform()
*/
inline double QwtScaleMap::transform( double s ) const
{
if ( d_transform )
s = d_transform->transform( s );
return d_p1 + ( s - d_ts1 ) * d_cnv;
}
/*!
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
\return Transformed value
\sa transform()
*/
inline double QwtScaleMap::invTransform( double p ) const
{
double s = d_ts1 + ( p - d_p1 ) / d_cnv;
if ( d_transform )
s = d_transform->invTransform( s );
return s;
}
//! \return True, when ( p1() < p2() ) != ( s1() < s2() )
inline bool QwtScaleMap::isInverting() const
{
return ( ( d_p1 < d_p2 ) != ( d_s1 < d_s2 ) );
}
#ifndef QT_NO_DEBUG_STREAM
QWT_EXPORT QDebug operator<<( QDebug, const QwtScaleMap & );
#endif
#endif
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