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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.
Constructor & Destructor Documentation¶
QwtScaleMap::QwtScaleMap ()¶
Constructor. The scale and paint device intervals are both set to [0,1].
QwtScaleMap::~QwtScaleMap ()¶
Destructor
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:
Returns:
See also:
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:
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:
bool QwtScaleMap::isInverting () const [inline]¶
Returns:
double QwtScaleMap::p1 () const [inline]¶
Returns:
double QwtScaleMap::p2 () const [inline]¶
Returns:
double QwtScaleMap::pDist () const [inline]¶
Returns:
double QwtScaleMap::s1 () const [inline]¶
Returns:
double QwtScaleMap::s2 () const [inline]¶
Returns:
double QwtScaleMap::sDist () const [inline]¶
Returns:
void QwtScaleMap::setPaintInterval (double p1, double p2)¶
Specify the borders of the paint device interval.
Parameters:
p2 second border
void QwtScaleMap::setScaleInterval (double s1, double s2)¶
Specify the borders of the scale interval.
Parameters:
s2 second border
Warning:
void QwtScaleMap::setTransformation (QwtTransform * transform)¶
Initialize the map with a transformation
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:
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:
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:
Author¶
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Wed Jan 2 2019 | Version 6.1.4 |