#include <qwt_polar_curve.h>

Inheritance diagram for QwtPolarCurve:

Public Types
enum	CurveStyle { NoCurve, Lines, UserCurve = 100 }
Public Member Functions
	QwtPolarCurve ()
	QwtPolarCurve (const QwtText &title)
	QwtPolarCurve (const QString &title)
virtual	~QwtPolarCurve ()
virtual int	rtti () const
void	setData (const QwtData &data)
QwtData &	data ()
const QwtData &	data () const
int	dataSize () const
double	radius (int i) const
double	azimuth (int i) const
QwtPolarPoint	sample (int i) const
void	setPen (const QPen &)
const QPen &	pen () const
void	setStyle (CurveStyle style)
CurveStyle	style () const
void	setSymbol (const QwtSymbol &s)
const QwtSymbol &	symbol () const
void	setCurveFitter (QwtCurveFitter *)
QwtCurveFitter *	curveFitter () const
virtual void	draw (QPainter *p, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QwtDoublePoint &pole, double radius, const QwtDoubleRect &canvasRect) const
virtual void	draw (QPainter *p, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QwtDoublePoint &pole, int from, int to) const
virtual void	updateLegend (QwtLegend *) const
virtual QwtDoubleInterval	boundingInterval (int scaleId) const
Protected Member Functions
void	init ()
virtual void	drawCurve (QPainter *, int style, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QwtDoublePoint &pole, int from, int to) const
virtual void	drawSymbols (QPainter *, const QwtSymbol &, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QwtDoublePoint &pole, int from, int to) const
void	drawLines (QPainter *, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QwtDoublePoint &pole, int from, int to) const

Detailed Description

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.

See also:: QwtPolarPlot, QwtSymbol, QwtScaleMap

Member Enumeration Documentation

enum QwtPolarCurve::CurveStyle

Curve styles.

NoCurve
Don't draw a curve. Note: This doesn't affect the symbols.
Lines
Connect the points with straight lines. The lines might be interpolated depending on the 'Fitted' attribute. Curve fitting can be configured using setCurveFitter().

See also:: setStyle()

Constructor & Destructor Documentation

QwtPolarCurve::QwtPolarCurve ( ) [explicit]

Constructor.

QwtPolarCurve::QwtPolarCurve ( const QwtText & title ) [explicit]

Constructor

Parameters:

title title of the curve

QwtPolarCurve::QwtPolarCurve ( const QString & title ) [explicit]

Constructor

Parameters:

title title of the curve

QwtPolarCurve::~QwtPolarCurve ( ) [virtual]

Destructor.

Member Function Documentation

double QwtPolarCurve::azimuth ( int i ) const [inline]

Parameters:

i index

Returns:: azimuth at position i

QwtDoubleInterval QwtPolarCurve::boundingInterval ( int scaleId ) const [virtual]

Interval, that is necessary to display the item This interval can be useful for operations like clipping or autoscaling

Parameters:

scaleId Scale index

Returns:: bounding interval

See also:: QwtData::boundingRect()

Reimplemented from QwtPolarItem.

QwtCurveFitter * QwtPolarCurve::curveFitter ( ) const

Return the curve fitter.

See also:: setCurveFitter()

QwtData & QwtPolarCurve::data ( ) [inline]

Returns:: the the curve data

const QwtData & QwtPolarCurve::data ( ) const [inline]

Returns:: the the curve data

int QwtPolarCurve::dataSize ( ) const

Return the size of the data arrays

See also:: setData()

void QwtPolarCurve::draw	(	QPainter *	painter,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QwtDoublePoint &	pole,
		double	radius,
		const QwtDoubleRect &	canvasRect
	)		const `[virtual]`

Draw the curve

Parameters:

painter	Painter
azimuthMap	Maps azimuth values to values related to 0.0, M_2PI
radialMap	Maps radius values into painter coordinates.
pole	Position of the pole in painter coordinates
radius	Radius of the complete plot area in painter coordinates
canvasRect	Contents rect of the canvas in painter coordinates

Implements QwtPolarItem.

void QwtPolarCurve::draw	(	QPainter *	painter,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QwtDoublePoint &	pole,
		int	from,
		int	to
	)		const `[virtual]`

Draw an interval of the curve.

Parameters:

painter	Painter
azimuthMap	Maps azimuth values to values related to 0.0, M_2PI
radialMap	Maps radius values into painter coordinates.
pole	Position of the pole in painter coordinates
from	index of the first point to be painted
to	index of the last point to be painted. If to < 0 the curve will be painted to its last point.

See also:: drawCurve(), drawSymbols(),

void QwtPolarCurve::drawCurve	(	QPainter *	painter,
		int	style,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QwtDoublePoint &	pole,
		int	from,
		int	to
	)		const `[protected, virtual]`

Draw the line part (without symbols) of a curve interval.

Parameters:

painter	Painter
style	Curve style, see QwtPolarCurve::CurveStyle
azimuthMap	Maps azimuth values to values related to 0.0, M_2PI
radialMap	Maps radius values into painter coordinates.
pole	Position of the pole in painter coordinates
from	index of the first point to be painted
to	index of the last point to be painted.

See also:: draw(), drawLines()

void QwtPolarCurve::drawLines	(	QPainter *	painter,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QwtDoublePoint &	pole,
		int	from,
		int	to
	)		const `[protected]`

Draw lines

Parameters:

painter	Painter
azimuthMap	Maps azimuth values to values related to 0.0, M_2PI
radialMap	Maps radius values into painter coordinates.
pole	Position of the pole in painter coordinates
from	index of the first point to be painted
to	index of the last point to be painted.

See also:: draw(), drawLines(), setCurveFitter()

void QwtPolarCurve::drawSymbols	(	QPainter *	painter,
		const QwtSymbol &	symbol,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QwtDoublePoint &	pole,
		int	from,
		int	to
	)		const `[protected, virtual]`

Draw symbols

Parameters:

painter	Painter
symbol	Curve symbol
azimuthMap	Maps azimuth values to values related to 0.0, M_2PI
radialMap	Maps radius values into painter coordinates.
pole	Position of the pole in painter coordinates
from	index of the first point to be painted
to	index of the last point to be painted.

See also:: setSymbol(), draw(), drawCurve()

void QwtPolarCurve::init ( ) [protected]

Initialize data members.

const QPen & QwtPolarCurve::pen ( ) const

Return the pen used to draw the lines.

See also:: setPen()

double QwtPolarCurve::radius ( int i ) const [inline]

Parameters:

i index

Returns:: radius at position i

int QwtPolarCurve::rtti ( ) const [virtual]

Returns:: QwtPolarCurve::Rtti_PolarCurve

Reimplemented from QwtPolarItem.

QwtPolarPoint QwtPolarCurve::sample ( int i ) const [inline]

Parameters:

i index

Returns:: point at position i

void QwtPolarCurve::setCurveFitter ( QwtCurveFitter * curveFitter )

Insert a curve fitter.

A curve fitter interpolates the curve points. F.e QwtPolarFitter adds equidistant points so that the connection gets rounded instead of having straight lines. If curveFitter is NULL fitting is disabled.

See also:: curveFitter()

void QwtPolarCurve::setData ( const QwtData & data )

Initialize data with a pointer to QwtData.

The x-values of the data object represent the azimuth, the y-value respresent the radius.

Parameters:

data Data

See also:: QwtData::copy()

void QwtPolarCurve::setPen ( const QPen & pen )

Assign a pen.

Parameters:

pen New pen

See also:: pen()

void QwtPolarCurve::setStyle ( CurveStyle style )

Set the curve's drawing style

Parameters:

style Curve style

See also:: CurveStyle, style()

void QwtPolarCurve::setSymbol ( const QwtSymbol & s )

Assign a symbol.

Parameters:

s symbol

See also:: symbol()

QwtPolarCurve::CurveStyle QwtPolarCurve::style ( ) const

Return the current style.

See also:: CurveStyle, setStyle()

const QwtSymbol & QwtPolarCurve::symbol ( ) const

Return the current symbol.

See also:: setSymbol()

void QwtPolarCurve::updateLegend ( QwtLegend * legend ) const [virtual]

Update the widget that represents the curve on the legend.

Reimplemented from QwtPolarItem.

Public Types

Public Member Functions

Protected Member Functions

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation