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QwtScaleMap(3) | Qwt User's Guide | QwtScaleMap(3) |
NAME¶
QwtScaleMap - A scale map.
SYNOPSIS¶
#include <qwt_scale_map.h>
Public Member Functions¶
QwtScaleMap ()
Constructor. QwtScaleMap (const QwtScaleMap &)
Copy constructor. ~QwtScaleMap ()
QwtScaleMap & operator= (const QwtScaleMap &)
Assignment operator. void setTransformation (QwtTransform *)
const QwtTransform * transformation () const
Get the transformation. void setPaintInterval (double p1, double
p2)
Specify the borders of the paint device interval. void setScaleInterval
(double s1, double s2)
Specify the borders of the scale interval. 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
bool isInverting () const
Static Public Member Functions¶
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 &)
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 26 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 21 of file qwt_scale_map.cpp.
QwtScaleMap::~QwtScaleMap ()¶
Destructor
Definition at line 49 of file qwt_scale_map.cpp.
Member Function Documentation¶
QPointF QwtScaleMap::invTransform (const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QPointF & pos) [static]¶
Transform a rectangle from paint to scale coordinates
Parameters
yMap Y map
pos Position in paint coordinates
Returns
See also
Definition at line 187 of file qwt_scale_map.cpp.
QRectF QwtScaleMap::invTransform (const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & rect) [static]¶
Transform a rectangle from paint to scale coordinates
Parameters
yMap Y map
rect Rectangle in paint coordinates
Returns
See also
Definition at line 224 of file qwt_scale_map.cpp.
double QwtScaleMap::invTransform (double p) const [inline]¶
Transform an paint device value into a value in the interval of the scale.
Parameters
Returns
See also
Definition at line 154 of file qwt_scale_map.h.
bool QwtScaleMap::isInverting () const [inline]¶
Returns
Definition at line 164 of file qwt_scale_map.h.
double QwtScaleMap::p1 () const [inline]¶
Returns
Definition at line 99 of file qwt_scale_map.h.
double QwtScaleMap::p2 () const [inline]¶
Returns
Definition at line 107 of file qwt_scale_map.h.
double QwtScaleMap::pDist () const [inline]¶
Returns
Definition at line 115 of file qwt_scale_map.h.
double QwtScaleMap::s1 () const [inline]¶
Returns
Definition at line 83 of file qwt_scale_map.h.
double QwtScaleMap::s2 () const [inline]¶
Returns
Definition at line 91 of file qwt_scale_map.h.
double QwtScaleMap::sDist () const [inline]¶
Returns
Definition at line 123 of file qwt_scale_map.h.
void QwtScaleMap::setPaintInterval (double p1, double p2)¶
Specify the borders of the paint device interval.
Parameters
p2 second border
Definition at line 119 of file qwt_scale_map.cpp.
void QwtScaleMap::setScaleInterval (double s1, double s2)¶
Specify the borders of the scale interval.
Parameters
s2 second border
Warning
Definition at line 100 of file qwt_scale_map.cpp.
void QwtScaleMap::setTransformation (QwtTransform * transform)¶
Initialize the map with a transformation
Definition at line 76 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
yMap Y map
pos Position in scale coordinates
Returns
See also
Definition at line 206 of file qwt_scale_map.cpp.
QRectF QwtScaleMap::transform (const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & rect) [static]¶
Transform a rectangle from scale to paint coordinates
Parameters
yMap Y map
rect Rectangle in scale coordinates
Returns
See also
Definition at line 153 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
Returns
See also
Definition at line 137 of file qwt_scale_map.h.
Author¶
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Sun Jul 18 2021 | Version 6.2.0 |