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.TH "QwtScaleMap" 3 "Sun Jul 18 2021" "Version 6.2.0" "Qwt User's Guide" \" -*- nroff -*-
.ad l
.nh
.SH NAME
QwtScaleMap \- A scale map\&.
.SH SYNOPSIS
.br
.PP
.PP
\fC#include <qwt_scale_map\&.h>\fP
.SS "Public Member Functions"
.in +1c
.ti -1c
.RI "\fBQwtScaleMap\fP ()"
.br
.RI "Constructor\&. "
.ti -1c
.RI "\fBQwtScaleMap\fP (const \fBQwtScaleMap\fP &)"
.br
.RI "Copy constructor\&. "
.ti -1c
.RI "\fB~QwtScaleMap\fP ()"
.br
.ti -1c
.RI "\fBQwtScaleMap\fP & \fBoperator=\fP (const \fBQwtScaleMap\fP &)"
.br
.RI "Assignment operator\&. "
.ti -1c
.RI "void \fBsetTransformation\fP (\fBQwtTransform\fP *)"
.br
.ti -1c
.RI "const \fBQwtTransform\fP * \fBtransformation\fP () const"
.br
.RI "Get the transformation\&. "
.ti -1c
.RI "void \fBsetPaintInterval\fP (double \fBp1\fP, double \fBp2\fP)"
.br
.RI "Specify the borders of the paint device interval\&. "
.ti -1c
.RI "void \fBsetScaleInterval\fP (double \fBs1\fP, double \fBs2\fP)"
.br
.RI "Specify the borders of the scale interval\&. "
.ti -1c
.RI "double \fBtransform\fP (double s) const"
.br
.ti -1c
.RI "double \fBinvTransform\fP (double p) const"
.br
.ti -1c
.RI "double \fBp1\fP () const"
.br
.ti -1c
.RI "double \fBp2\fP () const"
.br
.ti -1c
.RI "double \fBs1\fP () const"
.br
.ti -1c
.RI "double \fBs2\fP () const"
.br
.ti -1c
.RI "double \fBpDist\fP () const"
.br
.ti -1c
.RI "double \fBsDist\fP () const"
.br
.ti -1c
.RI "bool \fBisInverting\fP () const"
.br
.in -1c
.SS "Static Public Member Functions"
.in +1c
.ti -1c
.RI "static QRectF \fBtransform\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &, const QRectF &)"
.br
.ti -1c
.RI "static QRectF \fBinvTransform\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &, const QRectF &)"
.br
.ti -1c
.RI "static QPointF \fBtransform\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &, const QPointF &)"
.br
.ti -1c
.RI "static QPointF \fBinvTransform\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &, const QPointF &)"
.br
.in -1c
.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\&.
.PP
Definition at line 26 of file qwt_scale_map\&.h\&.
.SH "Constructor & Destructor Documentation"
.PP
.SS "QwtScaleMap::QwtScaleMap ()"
.PP
Constructor\&. The scale and paint device intervals are both set to [0,1]\&.
.PP
Definition at line 21 of file qwt_scale_map\&.cpp\&.
.SS "QwtScaleMap::~QwtScaleMap ()"
Destructor
.PP
Definition at line 49 of file qwt_scale_map\&.cpp\&.
.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
.PP
\fBParameters\fP
.RS 4
\fIxMap\fP X map
.br
\fIyMap\fP Y map
.br
\fIpos\fP Position in paint coordinates
.RE
.PP
\fBReturns\fP
.RS 4
Position in scale coordinates
.RE
.PP
\fBSee also\fP
.RS 4
\fBtransform()\fP
.RE
.PP
.PP
Definition at line 187 of file qwt_scale_map\&.cpp\&.
.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
.PP
\fBParameters\fP
.RS 4
\fIxMap\fP X map
.br
\fIyMap\fP Y map
.br
\fIrect\fP Rectangle in paint coordinates
.RE
.PP
\fBReturns\fP
.RS 4
Rectangle in scale coordinates
.RE
.PP
\fBSee also\fP
.RS 4
\fBtransform()\fP
.RE
.PP
.PP
Definition at line 224 of file qwt_scale_map\&.cpp\&.
.SS "double QwtScaleMap::invTransform (double p) const\fC [inline]\fP"
Transform an paint device value into a value in the interval of the scale\&.
.PP
\fBParameters\fP
.RS 4
\fIp\fP Value relative to the coordinates of the paint device
.RE
.PP
\fBReturns\fP
.RS 4
Transformed value
.RE
.PP
\fBSee also\fP
.RS 4
\fBtransform()\fP
.RE
.PP
.PP
Definition at line 154 of file qwt_scale_map\&.h\&.
.SS "bool QwtScaleMap::isInverting () const\fC [inline]\fP"
.PP
\fBReturns\fP
.RS 4
True, when ( \fBp1()\fP < \fBp2()\fP ) != ( \fBs1()\fP < \fBs2()\fP )
.RE
.PP
.PP
Definition at line 164 of file qwt_scale_map\&.h\&.
.SS "double QwtScaleMap::p1 () const\fC [inline]\fP"
.PP
\fBReturns\fP
.RS 4
First border of the paint interval
.RE
.PP
.PP
Definition at line 99 of file qwt_scale_map\&.h\&.
.SS "double QwtScaleMap::p2 () const\fC [inline]\fP"
.PP
\fBReturns\fP
.RS 4
Second border of the paint interval
.RE
.PP
.PP
Definition at line 107 of file qwt_scale_map\&.h\&.
.SS "double QwtScaleMap::pDist () const\fC [inline]\fP"
.PP
\fBReturns\fP
.RS 4
qwtAbs(\fBp2()\fP - \fBp1()\fP)
.RE
.PP
.PP
Definition at line 115 of file qwt_scale_map\&.h\&.
.SS "double QwtScaleMap::s1 () const\fC [inline]\fP"
.PP
\fBReturns\fP
.RS 4
First border of the scale interval
.RE
.PP
.PP
Definition at line 83 of file qwt_scale_map\&.h\&.
.SS "double QwtScaleMap::s2 () const\fC [inline]\fP"
.PP
\fBReturns\fP
.RS 4
Second border of the scale interval
.RE
.PP
.PP
Definition at line 91 of file qwt_scale_map\&.h\&.
.SS "double QwtScaleMap::sDist () const\fC [inline]\fP"
.PP
\fBReturns\fP
.RS 4
qwtAbs(\fBs2()\fP - \fBs1()\fP)
.RE
.PP
.PP
Definition at line 123 of file qwt_scale_map\&.h\&.
.SS "void QwtScaleMap::setPaintInterval (double p1, double p2)"
.PP
Specify the borders of the paint device interval\&.
.PP
\fBParameters\fP
.RS 4
\fIp1\fP first border
.br
\fIp2\fP second border
.RE
.PP
.PP
Definition at line 119 of file qwt_scale_map\&.cpp\&.
.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
.br
\fIs2\fP second border
.RE
.PP
\fBWarning\fP
.RS 4
scales might be aligned to transformation depending boundaries
.RE
.PP
.PP
Definition at line 100 of file qwt_scale_map\&.cpp\&.
.SS "void QwtScaleMap::setTransformation (\fBQwtTransform\fP * transform)"
Initialize the map with a transformation
.PP
Definition at line 76 of file qwt_scale_map\&.cpp\&.
.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
.br
\fIyMap\fP Y map
.br
\fIpos\fP Position in scale coordinates
.RE
.PP
\fBReturns\fP
.RS 4
Position in paint coordinates
.RE
.PP
\fBSee also\fP
.RS 4
\fBinvTransform()\fP
.RE
.PP
.PP
Definition at line 206 of file qwt_scale_map\&.cpp\&.
.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
.RS 4
\fIxMap\fP X map
.br
\fIyMap\fP Y map
.br
\fIrect\fP Rectangle in scale coordinates
.RE
.PP
\fBReturns\fP
.RS 4
Rectangle in paint coordinates
.RE
.PP
\fBSee also\fP
.RS 4
\fBinvTransform()\fP
.RE
.PP
.PP
Definition at line 153 of file qwt_scale_map\&.cpp\&.
.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
.PP
\fBParameters\fP
.RS 4
\fIs\fP Value relative to the coordinates of the scale
.RE
.PP
\fBReturns\fP
.RS 4
Transformed value
.RE
.PP
\fBSee also\fP
.RS 4
\fBinvTransform()\fP
.RE
.PP
.PP
Definition at line 137 of file qwt_scale_map\&.h\&.
.SH "Author"
.PP
Generated automatically by Doxygen for Qwt User's Guide from the source code\&.