Public Member Functions | Static Public Member Functions | Private Member Functions | Private Attributes | List of all members
QwtScaleMap Class Reference

A scale map. More...

#include <qwt_scale_map.h>

Public Member Functions

double invTransform (double p) const
 
bool isInverting () const
 
QwtScaleMapoperator= (const QwtScaleMap &)
 Assignment operator. More...
 
double p1 () const
 
double p2 () const
 
double pDist () const
 
 QwtScaleMap ()
 Constructor. More...
 
 QwtScaleMap (const QwtScaleMap &)
 Copy constructor. More...
 
double s1 () const
 
double s2 () const
 
double sDist () const
 
void setPaintInterval (double p1, double p2)
 Specify the borders of the paint device interval. More...
 
void setScaleInterval (double s1, double s2)
 Specify the borders of the scale interval. More...
 
void setTransformation (QwtTransform *)
 
double transform (double s) const
 
const QwtTransformtransformation () const
 Get the transformation. More...
 
 ~QwtScaleMap ()
 

Static Public Member Functions

static QRectF invTransform (const QwtScaleMap &, const QwtScaleMap &, const QRectF &)
 
static QPointF invTransform (const QwtScaleMap &, const QwtScaleMap &, const QPointF &)
 
static QRectF transform (const QwtScaleMap &, const QwtScaleMap &, const QRectF &)
 
static QPointF transform (const QwtScaleMap &, const QwtScaleMap &, const QPointF &)
 

Private Member Functions

void updateFactor ()
 

Private Attributes

double d_cnv
 
double d_p1
 
double d_p2
 
double d_s1
 
double d_s2
 
QwtTransformd_transform
 
double d_ts1
 

Detailed Description

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.

Definition at line 30 of file qwt_scale_map.h.

Constructor & Destructor Documentation

QwtScaleMap::QwtScaleMap ( )

Constructor.

The scale and paint device intervals are both set to [0,1].

Definition at line 20 of file qwt_scale_map.cpp.

QwtScaleMap::QwtScaleMap ( const QwtScaleMap other)

Copy constructor.

Definition at line 32 of file qwt_scale_map.cpp.

QwtScaleMap::~QwtScaleMap ( )

Destructor

Definition at line 48 of file qwt_scale_map.cpp.

Member Function Documentation

double QwtScaleMap::invTransform ( double  p) const
inline

Transform an paint device value into a value in the interval of the scale.

Parameters
pValue relative to the coordinates of the paint device
Returns
Transformed value
See also
transform()

Definition at line 156 of file qwt_scale_map.h.

QRectF QwtScaleMap::invTransform ( const QwtScaleMap xMap,
const QwtScaleMap yMap,
const QRectF &  rect 
)
static

Transform a rectangle from paint to scale coordinates

Parameters
xMapX map
yMapY map
rectRectangle in paint coordinates
Returns
Rectangle in scale coordinates
See also
transform()

Definition at line 223 of file qwt_scale_map.cpp.

QPointF QwtScaleMap::invTransform ( const QwtScaleMap xMap,
const QwtScaleMap yMap,
const QPointF &  pos 
)
static

Transform a rectangle from paint to scale coordinates

Parameters
xMapX map
yMapY map
posPosition in paint coordinates
Returns
Position in scale coordinates
See also
transform()

Definition at line 186 of file qwt_scale_map.cpp.

bool QwtScaleMap::isInverting ( ) const
inline
Returns
True, when ( p1() < p2() ) != ( s1() < s2() )

Definition at line 166 of file qwt_scale_map.h.

QwtScaleMap & QwtScaleMap::operator= ( const QwtScaleMap other)

Assignment operator.

Definition at line 54 of file qwt_scale_map.cpp.

double QwtScaleMap::p1 ( ) const
inline
Returns
First border of the paint interval

Definition at line 101 of file qwt_scale_map.h.

double QwtScaleMap::p2 ( ) const
inline
Returns
Second border of the paint interval

Definition at line 109 of file qwt_scale_map.h.

double QwtScaleMap::pDist ( ) const
inline
Returns
qwtAbs(p2() - p1())

Definition at line 117 of file qwt_scale_map.h.

double QwtScaleMap::s1 ( ) const
inline
Returns
First border of the scale interval

Definition at line 85 of file qwt_scale_map.h.

double QwtScaleMap::s2 ( ) const
inline
Returns
Second border of the scale interval

Definition at line 93 of file qwt_scale_map.h.

double QwtScaleMap::sDist ( ) const
inline
Returns
qwtAbs(s2() - s1())

Definition at line 125 of file qwt_scale_map.h.

void QwtScaleMap::setPaintInterval ( double  p1,
double  p2 
)

Specify the borders of the paint device interval.

Parameters
p1first border
p2second border

Definition at line 118 of file qwt_scale_map.cpp.

void QwtScaleMap::setScaleInterval ( double  s1,
double  s2 
)

Specify the borders of the scale interval.

Parameters
s1first border
s2second border
Warning
scales might be aligned to transformation depending boundaries

Definition at line 99 of file qwt_scale_map.cpp.

void QwtScaleMap::setTransformation ( QwtTransform transform)

Initialize the map with a transformation

Definition at line 75 of file qwt_scale_map.cpp.

double QwtScaleMap::transform ( double  s) const
inline

Transform a point related to the scale interval into an point related to the interval of the paint device

Parameters
sValue relative to the coordinates of the scale
Returns
Transformed value
See also
invTransform()

Definition at line 139 of file qwt_scale_map.h.

QRectF QwtScaleMap::transform ( const QwtScaleMap xMap,
const QwtScaleMap yMap,
const QRectF &  rect 
)
static

Transform a rectangle from scale to paint coordinates

Parameters
xMapX map
yMapY map
rectRectangle in scale coordinates
Returns
Rectangle in paint coordinates
See also
invTransform()

Definition at line 152 of file qwt_scale_map.cpp.

QPointF QwtScaleMap::transform ( const QwtScaleMap xMap,
const QwtScaleMap yMap,
const QPointF &  pos 
)
static

Transform a point from scale to paint coordinates

Parameters
xMapX map
yMapY map
posPosition in scale coordinates
Returns
Position in paint coordinates
See also
invTransform()

Definition at line 205 of file qwt_scale_map.cpp.

const QwtTransform * QwtScaleMap::transformation ( ) const

Get the transformation.

Definition at line 87 of file qwt_scale_map.cpp.

void QwtScaleMap::updateFactor ( )
private

Definition at line 126 of file qwt_scale_map.cpp.

Member Data Documentation

double QwtScaleMap::d_cnv
private

Definition at line 76 of file qwt_scale_map.h.

double QwtScaleMap::d_p1
private

Definition at line 74 of file qwt_scale_map.h.

double QwtScaleMap::d_p2
private

Definition at line 74 of file qwt_scale_map.h.

double QwtScaleMap::d_s1
private

Definition at line 73 of file qwt_scale_map.h.

double QwtScaleMap::d_s2
private

Definition at line 73 of file qwt_scale_map.h.

QwtTransform* QwtScaleMap::d_transform
private

Definition at line 79 of file qwt_scale_map.h.

double QwtScaleMap::d_ts1
private

Definition at line 77 of file qwt_scale_map.h.


The documentation for this class was generated from the following files:


plotjuggler
Author(s): Davide Faconti
autogenerated on Sat Jul 6 2019 03:44:19