#include <qwt_polar_curve.h>

Inheritance diagram for QwtPolarCurve:

Public Types
enum	CurveStyle { NoCurve, Lines, UserCurve = 100 }
Public Types inherited from QwtPolarItem
enum	RttiValues { Rtti_PolarItem = 0, Rtti_PolarGrid, Rtti_PolarScale, Rtti_PolarMarker, Rtti_PolarCurve, Rtti_PolarSpectrogram, Rtti_PolarUserItem = 1000 }
enum	ItemAttribute { Legend = 1, AutoScale = 2 }
enum	RenderHint { RenderAntialiased = 1 }

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
Public Member Functions inherited from QwtPolarItem
	QwtPolarItem (const QwtText &title=QwtText())
virtual	~QwtPolarItem ()
void	attach (QwtPolarPlot *plot)
void	detach ()
QwtPolarPlot *	plot () const
void	setTitle (const QString &title)
void	setTitle (const QwtText &title)
const QwtText &	title () const
void	setItemAttribute (ItemAttribute, bool on=true)
bool	testItemAttribute (ItemAttribute) const
void	setRenderHint (RenderHint, bool on=true)
bool	testRenderHint (RenderHint) const
double	z () const
void	setZ (double z)
void	show ()
void	hide ()
virtual void	setVisible (bool)
bool	isVisible () const
virtual void	itemChanged ()
virtual QWidget *	legendItem () const
virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &, const QwtDoubleInterval &)
virtual int	marginHint () 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

protectedvirtual

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

protectedvirtual

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