Sources_For_Linux/Qwt/doc/man/man3/QwtScaleMap.3

.TH "QwtScaleMap" 3 "Mon Dec 28 2020" "Version 6.1.6" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtScaleMap \- A scale map\&.  

.SH SYNOPSIS
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.PP
.PP
\fC#include <qwt_scale_map\&.h>\fP
.SS "Public Member Functions"

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.RI "\fBQwtScaleMap\fP ()"
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.RI "Constructor\&. "
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.RI "\fBQwtScaleMap\fP (const \fBQwtScaleMap\fP &)"
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.RI "Copy constructor\&. "
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.RI "\fB~QwtScaleMap\fP ()"
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.RI "\fBQwtScaleMap\fP & \fBoperator=\fP (const \fBQwtScaleMap\fP &)"
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.RI "Assignment operator\&. "
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.RI "void \fBsetTransformation\fP (\fBQwtTransform\fP *)"
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.RI "const \fBQwtTransform\fP * \fBtransformation\fP () const"
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.RI "Get the transformation\&. "
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.RI "void \fBsetPaintInterval\fP (double \fBp1\fP, double \fBp2\fP)"
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.RI "Specify the borders of the paint device interval\&. "
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.RI "void \fBsetScaleInterval\fP (double \fBs1\fP, double \fBs2\fP)"
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.RI "Specify the borders of the scale interval\&. "
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.RI "double \fBtransform\fP (double s) const"
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.RI "double \fBinvTransform\fP (double p) const"
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.RI "double \fBp1\fP () const"
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.RI "double \fBp2\fP () const"
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.RI "double \fBs1\fP () const"
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.RI "double \fBs2\fP () const"
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.RI "double \fBpDist\fP () const"
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.RI "double \fBsDist\fP () const"
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.RI "bool \fBisInverting\fP () const"
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.SS "Static Public Member Functions"

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.RI "static QRectF \fBtransform\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &, const QRectF &)"
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.RI "static QRectF \fBinvTransform\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &, const QRectF &)"
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.RI "static QPointF \fBtransform\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &, const QPointF &)"
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.RI "static QPointF \fBinvTransform\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &, const QPointF &)"
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.SH "Detailed Description"
.PP 
A scale map\&. 

\fBQwtScaleMap\fP offers transformations from the coordinate system of a scale into the linear coordinate system of a paint device and vice versa\&. 
.SH "Constructor & Destructor Documentation"
.PP 
.SS "QwtScaleMap::QwtScaleMap ()"

.PP
Constructor\&. The scale and paint device intervals are both set to [0,1]\&. 
.SS "QwtScaleMap::~QwtScaleMap ()"
Destructor 
.SH "Member Function Documentation"
.PP 
.SS "QPointF QwtScaleMap::invTransform (const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QPointF & pos)\fC [static]\fP"
Transform a rectangle from paint to scale coordinates
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\fBParameters\fP
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\fIxMap\fP X map 
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\fIyMap\fP Y map 
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\fIpos\fP Position in paint coordinates 
.RE
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\fBReturns\fP
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Position in scale coordinates 
.RE
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\fBSee also\fP
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\fBtransform()\fP 
.RE
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.SS "QRectF QwtScaleMap::invTransform (const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QRectF & rect)\fC [static]\fP"
Transform a rectangle from paint to scale coordinates
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\fBParameters\fP
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\fIxMap\fP X map 
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\fIyMap\fP Y map 
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\fIrect\fP Rectangle in paint coordinates 
.RE
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\fBReturns\fP
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Rectangle in scale coordinates 
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\fBSee also\fP
.RS 4
\fBtransform()\fP 
.RE
.PP

.SS "double QwtScaleMap::invTransform (double p) const\fC [inline]\fP"
Transform an paint device value into a value in the interval of the scale\&.
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\fBParameters\fP
.RS 4
\fIp\fP Value relative to the coordinates of the paint device 
.RE
.PP
\fBReturns\fP
.RS 4
Transformed value
.RE
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\fBSee also\fP
.RS 4
\fBtransform()\fP 
.RE
.PP

.SS "bool QwtScaleMap::isInverting () const\fC [inline]\fP"

.PP
\fBReturns\fP
.RS 4
True, when ( \fBp1()\fP < \fBp2()\fP ) != ( \fBs1()\fP < \fBs2()\fP ) 
.RE
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.SS "double QwtScaleMap::p1 () const\fC [inline]\fP"

.PP
\fBReturns\fP
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First border of the paint interval 
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.SS "double QwtScaleMap::p2 () const\fC [inline]\fP"

.PP
\fBReturns\fP
.RS 4
Second border of the paint interval 
.RE
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.SS "double QwtScaleMap::pDist () const\fC [inline]\fP"

.PP
\fBReturns\fP
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qwtAbs(\fBp2()\fP - \fBp1()\fP) 
.RE
.PP

.SS "double QwtScaleMap::s1 () const\fC [inline]\fP"

.PP
\fBReturns\fP
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First border of the scale interval 
.RE
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.SS "double QwtScaleMap::s2 () const\fC [inline]\fP"

.PP
\fBReturns\fP
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Second border of the scale interval 
.RE
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.SS "double QwtScaleMap::sDist () const\fC [inline]\fP"

.PP
\fBReturns\fP
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qwtAbs(\fBs2()\fP - \fBs1()\fP) 
.RE
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.SS "void QwtScaleMap::setPaintInterval (double p1, double p2)"

.PP
Specify the borders of the paint device interval\&. 
.PP
\fBParameters\fP
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\fIp1\fP first border 
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\fIp2\fP second border 
.RE
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.SS "void QwtScaleMap::setScaleInterval (double s1, double s2)"

.PP
Specify the borders of the scale interval\&. 
.PP
\fBParameters\fP
.RS 4
\fIs1\fP first border 
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\fIs2\fP second border 
.RE
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\fBWarning\fP
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scales might be aligned to transformation depending boundaries 
.RE
.PP

.SS "void QwtScaleMap::setTransformation (\fBQwtTransform\fP * transform)"
Initialize the map with a transformation 
.SS "QPointF QwtScaleMap::transform (const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QPointF & pos)\fC [static]\fP"
Transform a point from scale to paint coordinates
.PP
\fBParameters\fP
.RS 4
\fIxMap\fP X map 
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\fIyMap\fP Y map 
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\fIpos\fP Position in scale coordinates 
.RE
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\fBReturns\fP
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Position in paint coordinates
.RE
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\fBSee also\fP
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\fBinvTransform()\fP 
.RE
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.SS "QRectF QwtScaleMap::transform (const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QRectF & rect)\fC [static]\fP"
Transform a rectangle from scale to paint coordinates
.PP
\fBParameters\fP
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\fIxMap\fP X map 
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\fIyMap\fP Y map 
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\fIrect\fP Rectangle in scale coordinates 
.RE
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\fBReturns\fP
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Rectangle in paint coordinates
.RE
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\fBSee also\fP
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\fBinvTransform()\fP 
.RE
.PP

.SS "double QwtScaleMap::transform (double s) const\fC [inline]\fP"
Transform a point related to the scale interval into an point related to the interval of the paint device
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\fBParameters\fP
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\fIs\fP Value relative to the coordinates of the scale 
.RE
.PP
\fBReturns\fP
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Transformed value
.RE
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\fBSee also\fP
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\fBinvTransform()\fP 
.RE
.PP


.SH "Author"
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Generated automatically by Doxygen for Qwt User's Guide from the source code\&.