.TH "QwtPolarCurve" 3 "Sun Jul 18 2021" "Version 6.2.0" "Qwt User's Guide" \" -*- nroff -*-
.ad l
.nh
.SH NAME
QwtPolarCurve \- An item, that represents a series of points\&.  

.SH SYNOPSIS
.br
.PP
.PP
\fC#include <qwt_polar_curve\&.h>\fP
.PP
Inherits \fBQwtPolarItem\fP\&.
.SS "Public Types"

.in +1c
.ti -1c
.RI "enum \fBCurveStyle\fP { \fBNoCurve\fP, \fBLines\fP, \fBUserCurve\fP = 100 }"
.br
.ti -1c
.RI "enum \fBLegendAttribute\fP { \fBLegendShowLine\fP = 0x01, \fBLegendShowSymbol\fP = 0x02 }"
.br
.RI "Attributes how to represent the curve on the legend\&. "
.ti -1c
.RI "typedef QFlags< \fBLegendAttribute\fP > \fBLegendAttributes\fP"
.br
.in -1c
.SS "Public Member Functions"

.in +1c
.ti -1c
.RI "\fBQwtPolarCurve\fP ()"
.br
.RI "Constructor\&. "
.ti -1c
.RI "\fBQwtPolarCurve\fP (const \fBQwtText\fP &\fBtitle\fP)"
.br
.ti -1c
.RI "\fBQwtPolarCurve\fP (const QString &\fBtitle\fP)"
.br
.ti -1c
.RI "virtual \fB~QwtPolarCurve\fP ()"
.br
.RI "Destructor\&. "
.ti -1c
.RI "virtual int \fBrtti\fP () const override"
.br
.ti -1c
.RI "void \fBsetLegendAttribute\fP (\fBLegendAttribute\fP, bool on=true)"
.br
.ti -1c
.RI "bool \fBtestLegendAttribute\fP (\fBLegendAttribute\fP) const"
.br
.RI "Test if a legend attribute is enabled\&. "
.ti -1c
.RI "void \fBsetData\fP (\fBQwtSeriesData\fP< \fBQwtPointPolar\fP > *\fBdata\fP)"
.br
.ti -1c
.RI "const \fBQwtSeriesData\fP< \fBQwtPointPolar\fP > * \fBdata\fP () const"
.br
.ti -1c
.RI "size_t \fBdataSize\fP () const"
.br
.ti -1c
.RI "\fBQwtPointPolar\fP \fBsample\fP (int i) const"
.br
.ti -1c
.RI "void \fBsetPen\fP (const QPen &)"
.br
.RI "Assign a pen\&. "
.ti -1c
.RI "const QPen & \fBpen\fP () const"
.br
.ti -1c
.RI "void \fBsetStyle\fP (\fBCurveStyle\fP \fBstyle\fP)"
.br
.ti -1c
.RI "\fBCurveStyle\fP \fBstyle\fP () const"
.br
.ti -1c
.RI "void \fBsetSymbol\fP (\fBQwtSymbol\fP *)"
.br
.RI "Assign a symbol\&. "
.ti -1c
.RI "const \fBQwtSymbol\fP * \fBsymbol\fP () const"
.br
.ti -1c
.RI "void \fBsetCurveFitter\fP (\fBQwtCurveFitter\fP *)"
.br
.RI "Insert a curve fitter\&. "
.ti -1c
.RI "\fBQwtCurveFitter\fP * \fBcurveFitter\fP () const"
.br
.ti -1c
.RI "virtual void \fBdraw\fP (QPainter *p, const \fBQwtScaleMap\fP &azimuthMap, const \fBQwtScaleMap\fP &radialMap, const QPointF &pole, double radius, const QRectF &canvasRect) const override"
.br
.ti -1c
.RI "virtual void \fBdraw\fP (QPainter *p, const \fBQwtScaleMap\fP &azimuthMap, const \fBQwtScaleMap\fP &radialMap, const QPointF &pole, int from, int to) const"
.br
.RI "Draw an interval of the curve\&. "
.ti -1c
.RI "virtual \fBQwtInterval\fP \fBboundingInterval\fP (int scaleId) const override"
.br
.ti -1c
.RI "virtual \fBQwtGraphic\fP \fBlegendIcon\fP (int index, const QSizeF &) const override"
.br
.in -1c
.SS "Protected Member Functions"

.in +1c
.ti -1c
.RI "void \fBinit\fP ()"
.br
.RI "Initialize data members\&. "
.ti -1c
.RI "virtual void \fBdrawCurve\fP (QPainter *, int \fBstyle\fP, const \fBQwtScaleMap\fP &azimuthMap, const \fBQwtScaleMap\fP &radialMap, const QPointF &pole, int from, int to) const"
.br
.ti -1c
.RI "virtual void \fBdrawSymbols\fP (QPainter *, const \fBQwtSymbol\fP &, const \fBQwtScaleMap\fP &azimuthMap, const \fBQwtScaleMap\fP &radialMap, const QPointF &pole, int from, int to) const"
.br
.ti -1c
.RI "void \fBdrawLines\fP (QPainter *, const \fBQwtScaleMap\fP &azimuthMap, const \fBQwtScaleMap\fP &radialMap, const QPointF &pole, int from, int to) const"
.br
.in -1c
.SH "Detailed Description"
.PP 
An item, that represents a series of points\&. 

A curve is the representation of a series of points in polar coordinates\&. The points are connected to the curve using the abstract QwtData interface\&.
.PP
\fBSee also\fP
.RS 4
\fBQwtPolarPlot\fP, \fBQwtSymbol\fP, \fBQwtScaleMap\fP 
.RE
.PP

.PP
Definition at line 30 of file qwt_polar_curve\&.h\&.
.SH "Member Typedef Documentation"
.PP 
.SS "typedef QFlags<\fBLegendAttribute\fP > \fBQwtPolarCurve::LegendAttributes\fP"
An ORed combination of \fBLegendAttribute\fP values\&. 
.PP
Definition at line 75 of file qwt_polar_curve\&.h\&.
.SH "Member Enumeration Documentation"
.PP 
.SS "enum \fBQwtPolarCurve::CurveStyle\fP"
Curve styles\&. 
.PP
\fBSee also\fP
.RS 4
\fBsetStyle()\fP, \fBstyle()\fP 
.RE
.PP

.PP
\fBEnumerator\fP
.in +1c
.TP
\fB\fINoCurve \fP\fP
Don't draw a curve\&. Note: This doesn't affect the symbols\&. 
.TP
\fB\fILines \fP\fP
Connect the points with straight lines\&. The lines might be interpolated depending on the 'Fitted' attribute\&. Curve fitting can be configured using \fBsetCurveFitter()\fP\&. 
.TP
\fB\fIUserCurve \fP\fP
Values > 100 are reserved for user specific curve styles\&. 
.PP
Definition at line 37 of file qwt_polar_curve\&.h\&.
.SS "enum \fBQwtPolarCurve::LegendAttribute\fP"

.PP
Attributes how to represent the curve on the legend\&. If none of the flags is activated \fBQwtPlotCurve\fP tries to find a color representing the curve and paints a rectangle with it\&. In the default setting all attributes are off\&.
.PP
\fBSee also\fP
.RS 4
\fBsetLegendAttribute()\fP, \fBtestLegendAttribute()\fP 
.RE
.PP

.PP
\fBEnumerator\fP
.in +1c
.TP
\fB\fILegendShowLine \fP\fP
If the curveStyle() is not NoCurve a line is painted with the curvePen()\&. 
.TP
\fB\fILegendShowSymbol \fP\fP
If the curve has a valid symbol it is painted\&. 
.PP
Definition at line 63 of file qwt_polar_curve\&.h\&.
.SH "Constructor & Destructor Documentation"
.PP 
.SS "QwtPolarCurve::QwtPolarCurve (const \fBQwtText\fP & title)\fC [explicit]\fP"
Constructor 
.PP
\fBParameters\fP
.RS 4
\fItitle\fP title of the curve 
.RE
.PP

.PP
Definition at line 76 of file qwt_polar_curve\&.cpp\&.
.SS "QwtPolarCurve::QwtPolarCurve (const QString & title)\fC [explicit]\fP"
Constructor 
.PP
\fBParameters\fP
.RS 4
\fItitle\fP title of the curve 
.RE
.PP

.PP
Definition at line 86 of file qwt_polar_curve\&.cpp\&.
.SH "Member Function Documentation"
.PP 
.SS "\fBQwtInterval\fP QwtPolarCurve::boundingInterval (int scaleId) const\fC [override]\fP, \fC [virtual]\fP"
Interval, that is necessary to display the item This interval can be useful for operations like clipping or autoscaling
.PP
\fBParameters\fP
.RS 4
\fIscaleId\fP Scale index 
.RE
.PP
\fBReturns\fP
.RS 4
bounding interval
.RE
.PP
\fBSee also\fP
.RS 4
QwtData::boundingRect() 
.RE
.PP

.PP
Reimplemented from \fBQwtPolarItem\fP\&.
.PP
Definition at line 585 of file qwt_polar_curve\&.cpp\&.
.SS "\fBQwtCurveFitter\fP * QwtPolarCurve::curveFitter () const"

.PP
\fBReturns\fP
.RS 4
The curve fitter 
.RE
.PP
\fBSee also\fP
.RS 4
\fBsetCurveFitter()\fP 
.RE
.PP

.PP
Definition at line 261 of file qwt_polar_curve\&.cpp\&.
.SS "const \fBQwtSeriesData\fP< \fBQwtPointPolar\fP > * QwtPolarCurve::data () const\fC [inline]\fP"

.PP
\fBReturns\fP
.RS 4
the the curve data 
.RE
.PP

.PP
Definition at line 144 of file qwt_polar_curve\&.h\&.
.SS "size_t QwtPolarCurve::dataSize () const"

.PP
\fBReturns\fP
.RS 4
Number of points 
.RE
.PP
\fBSee also\fP
.RS 4
\fBsetData()\fP 
.RE
.PP

.PP
Definition at line 499 of file qwt_polar_curve\&.cpp\&.
.SS "void QwtPolarCurve::draw (QPainter * painter, const \fBQwtScaleMap\fP & azimuthMap, const \fBQwtScaleMap\fP & radialMap, const QPointF & pole, double radius, const QRectF & canvasRect) const\fC [override]\fP, \fC [virtual]\fP"
Draw the curve
.PP
\fBParameters\fP
.RS 4
\fIpainter\fP Painter 
.br
\fIazimuthMap\fP Maps azimuth values to values related to 0\&.0, M_2PI 
.br
\fIradialMap\fP Maps radius values into painter coordinates\&. 
.br
\fIpole\fP Position of the pole in painter coordinates 
.br
\fIradius\fP Radius of the complete plot area in painter coordinates 
.br
\fIcanvasRect\fP Contents rect of the canvas in painter coordinates 
.RE
.PP

.PP
Implements \fBQwtPolarItem\fP\&.
.PP
Definition at line 276 of file qwt_polar_curve\&.cpp\&.
.SS "void QwtPolarCurve::draw (QPainter * painter, const \fBQwtScaleMap\fP & azimuthMap, const \fBQwtScaleMap\fP & radialMap, const QPointF & pole, int from, int to) const\fC [virtual]\fP"

.PP
Draw an interval of the curve\&. 
.PP
\fBParameters\fP
.RS 4
\fIpainter\fP Painter 
.br
\fIazimuthMap\fP Maps azimuth values to values related to 0\&.0, M_2PI 
.br
\fIradialMap\fP Maps radius values into painter coordinates\&. 
.br
\fIpole\fP Position of the pole in painter coordinates 
.br
\fIfrom\fP index of the first point to be painted 
.br
\fIto\fP index of the last point to be painted\&. If to < 0 the curve will be painted to its last point\&.
.RE
.PP
\fBSee also\fP
.RS 4
\fBdrawCurve()\fP, \fBdrawSymbols()\fP, 
.RE
.PP

.PP
Definition at line 299 of file qwt_polar_curve\&.cpp\&.
.SS "void QwtPolarCurve::drawCurve (QPainter * painter, int style, const \fBQwtScaleMap\fP & azimuthMap, const \fBQwtScaleMap\fP & radialMap, const QPointF & pole, int from, int to) const\fC [protected]\fP, \fC [virtual]\fP"
Draw the line part (without symbols) of a curve interval\&.
.PP
\fBParameters\fP
.RS 4
\fIpainter\fP Painter 
.br
\fIstyle\fP Curve style, see \fBQwtPolarCurve::CurveStyle\fP 
.br
\fIazimuthMap\fP Maps azimuth values to values related to 0\&.0, M_2PI 
.br
\fIradialMap\fP Maps radius values into painter coordinates\&. 
.br
\fIpole\fP Position of the pole in painter coordinates 
.br
\fIfrom\fP index of the first point to be painted 
.br
\fIto\fP index of the last point to be painted\&. 
.RE
.PP
\fBSee also\fP
.RS 4
\fBdraw()\fP, \fBdrawLines()\fP 
.RE
.PP

.PP
Definition at line 341 of file qwt_polar_curve\&.cpp\&.
.SS "void QwtPolarCurve::drawLines (QPainter * painter, const \fBQwtScaleMap\fP & azimuthMap, const \fBQwtScaleMap\fP & radialMap, const QPointF & pole, int from, int to) const\fC [protected]\fP"
Draw lines
.PP
\fBParameters\fP
.RS 4
\fIpainter\fP Painter 
.br
\fIazimuthMap\fP Maps azimuth values to values related to 0\&.0, M_2PI 
.br
\fIradialMap\fP Maps radius values into painter coordinates\&. 
.br
\fIpole\fP Position of the pole in painter coordinates 
.br
\fIfrom\fP index of the first point to be painted 
.br
\fIto\fP index of the last point to be painted\&. 
.RE
.PP
\fBSee also\fP
.RS 4
\fBdraw()\fP, \fBdrawLines()\fP, \fBsetCurveFitter()\fP 
.RE
.PP

.PP
Definition at line 367 of file qwt_polar_curve\&.cpp\&.
.SS "void QwtPolarCurve::drawSymbols (QPainter * painter, const \fBQwtSymbol\fP & symbol, const \fBQwtScaleMap\fP & azimuthMap, const \fBQwtScaleMap\fP & radialMap, const QPointF & pole, int from, int to) const\fC [protected]\fP, \fC [virtual]\fP"
Draw symbols
.PP
\fBParameters\fP
.RS 4
\fIpainter\fP Painter 
.br
\fIsymbol\fP Curve symbol 
.br
\fIazimuthMap\fP Maps azimuth values to values related to 0\&.0, M_2PI 
.br
\fIradialMap\fP Maps radius values into painter coordinates\&. 
.br
\fIpole\fP Position of the pole in painter coordinates 
.br
\fIfrom\fP index of the first point to be painted 
.br
\fIto\fP index of the last point to be painted\&.
.RE
.PP
\fBSee also\fP
.RS 4
\fBsetSymbol()\fP, \fBdraw()\fP, \fBdrawCurve()\fP 
.RE
.PP

.PP
Definition at line 459 of file qwt_polar_curve\&.cpp\&.
.SS "\fBQwtGraphic\fP QwtPolarCurve::legendIcon (int index, const QSizeF & size) const\fC [override]\fP, \fC [virtual]\fP"

.PP
\fBReturns\fP
.RS 4
Icon representing the curve on the legend
.RE
.PP
\fBParameters\fP
.RS 4
\fIindex\fP Index of the legend entry ( ignored as there is only one ) 
.br
\fIsize\fP Icon size
.RE
.PP
\fBSee also\fP
.RS 4
\fBQwtPolarItem::setLegendIconSize()\fP, \fBQwtPolarItem::legendData()\fP 
.RE
.PP

.PP
Reimplemented from \fBQwtPolarItem\fP\&.
.PP
Definition at line 513 of file qwt_polar_curve\&.cpp\&.
.SS "const QPen & QwtPolarCurve::pen () const"

.PP
\fBReturns\fP
.RS 4
Pen used to draw the lines 
.RE
.PP
\fBSee also\fP
.RS 4
\fBsetPen()\fP 
.RE
.PP

.PP
Definition at line 212 of file qwt_polar_curve\&.cpp\&.
.SS "int QwtPolarCurve::rtti () const\fC [override]\fP, \fC [virtual]\fP"

.PP
\fBReturns\fP
.RS 4
\fBQwtPolarCurve::Rtti_PolarCurve\fP 
.RE
.PP

.PP
Reimplemented from \fBQwtPolarItem\fP\&.
.PP
Definition at line 113 of file qwt_polar_curve\&.cpp\&.
.SS "\fBQwtPointPolar\fP QwtPolarCurve::sample (int i) const\fC [inline]\fP"

.PP
\fBParameters\fP
.RS 4
\fIi\fP index 
.RE
.PP
\fBReturns\fP
.RS 4
point at position i 
.RE
.PP

.PP
Definition at line 153 of file qwt_polar_curve\&.h\&.
.SS "void QwtPolarCurve::setCurveFitter (\fBQwtCurveFitter\fP * curveFitter)"

.PP
Insert a curve fitter\&. 
.PP
\fBParameters\fP
.RS 4
\fIcurveFitter\fP Curve fitter
.RE
.PP
A curve fitter interpolates the curve points\&. F\&.e \fBQwtPolarFitter\fP adds equidistant points so that the connection gets rounded instead of having straight lines\&. If curveFitter is NULL fitting is disabled\&.
.PP
\fBSee also\fP
.RS 4
\fBcurveFitter()\fP 
.RE
.PP

.PP
Definition at line 246 of file qwt_polar_curve\&.cpp\&.
.SS "void QwtPolarCurve::setData (\fBQwtSeriesData\fP< \fBQwtPointPolar\fP > * data)"
Initialize data with a pointer to \fBQwtSeriesData<QwtPointPolar>\fP\&.
.PP
The x-values of the data object represent the azimuth, the y-value represents the radius\&.
.PP
\fBParameters\fP
.RS 4
\fIdata\fP Data 
.RE
.PP

.PP
Definition at line 225 of file qwt_polar_curve\&.cpp\&.
.SS "void QwtPolarCurve::setLegendAttribute (\fBLegendAttribute\fP attribute, bool on = \fCtrue\fP)"
Specify an attribute how to draw the legend identifier
.PP
\fBParameters\fP
.RS 4
\fIattribute\fP Attribute 
.br
\fIon\fP On/Off /sa LegendAttribute, \fBtestLegendAttribute()\fP 
.RE
.PP

.PP
Definition at line 125 of file qwt_polar_curve\&.cpp\&.
.SS "void QwtPolarCurve::setPen (const QPen & pen)"

.PP
Assign a pen\&. 
.PP
\fBParameters\fP
.RS 4
\fIpen\fP New pen 
.RE
.PP
\fBSee also\fP
.RS 4
\fBpen()\fP 
.RE
.PP

.PP
Definition at line 199 of file qwt_polar_curve\&.cpp\&.
.SS "void QwtPolarCurve::setStyle (\fBCurveStyle\fP style)"
Set the curve's drawing style
.PP
\fBParameters\fP
.RS 4
\fIstyle\fP Curve style 
.RE
.PP
\fBSee also\fP
.RS 4
\fBCurveStyle\fP, \fBstyle()\fP 
.RE
.PP

.PP
Definition at line 152 of file qwt_polar_curve\&.cpp\&.
.SS "void QwtPolarCurve::setSymbol (\fBQwtSymbol\fP * symbol)"

.PP
Assign a symbol\&. 
.PP
\fBParameters\fP
.RS 4
\fIsymbol\fP Symbol 
.RE
.PP
\fBSee also\fP
.RS 4
\fBsymbol()\fP 
.RE
.PP

.PP
Definition at line 175 of file qwt_polar_curve\&.cpp\&.
.SS "\fBQwtPolarCurve::CurveStyle\fP QwtPolarCurve::style () const"

.PP
\fBReturns\fP
.RS 4
Current style 
.RE
.PP
\fBSee also\fP
.RS 4
\fBCurveStyle\fP, \fBsetStyle()\fP 
.RE
.PP

.PP
Definition at line 165 of file qwt_polar_curve\&.cpp\&.
.SS "const \fBQwtSymbol\fP * QwtPolarCurve::symbol () const"

.PP
\fBReturns\fP
.RS 4
The current symbol 
.RE
.PP
\fBSee also\fP
.RS 4
\fBsetSymbol()\fP 
.RE
.PP

.PP
Definition at line 189 of file qwt_polar_curve\&.cpp\&.
.SS "bool QwtPolarCurve::testLegendAttribute (\fBLegendAttribute\fP attribute) const"

.PP
Test if a legend attribute is enabled\&. 
.PP
\fBParameters\fP
.RS 4
\fIattribute\fP Legend attribute
.RE
.PP
\fBReturns\fP
.RS 4
True if attribute is enabled 
.RE
.PP
\fBSee also\fP
.RS 4
\fBLegendAttribute\fP, \fBsetLegendAttribute()\fP 
.RE
.PP

.PP
Definition at line 141 of file qwt_polar_curve\&.cpp\&.

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