An item, that represents a series of points. More...

#include <qwt_polar_curve.h>

Inheritance diagram for QwtPolarCurve:

Classes
class	PrivateData

Public Types
enum	CurveStyle { NoCurve , Lines , UserCurve = 100 }
	Curve styles. More...

enum	LegendAttribute { LegendShowLine = 0x01 , LegendShowSymbol = 0x02 }
	Attributes how to represent the curve on the legend. More...

Public Types inherited from QwtPolarItem
enum	RttiValues { Rtti_PolarItem = 0 , Rtti_PolarGrid , Rtti_PolarMarker , Rtti_PolarCurve , Rtti_PolarSpectrogram , Rtti_PolarUserItem = 1000 }
	Runtime type information. More...

enum	ItemAttribute { Legend = 0x01 , AutoScale = 0x02 }
	Plot Item Attributes. More...

enum	RenderHint { RenderAntialiased = 0x01 }
	Render hints. More...

Public Member Functions
	QwtPolarCurve ()
	Constructor.

	QwtPolarCurve (const QwtText &title)
	Constructor with title.

	QwtPolarCurve (const QString &title)
	Constructor with title string.

	~QwtPolarCurve () override
	Destructor.

virtual int	rtti () const override
	Get the runtime type information.

void	setLegendAttribute (LegendAttribute, bool on=true)
	Set a legend attribute.

bool	testLegendAttribute (LegendAttribute) const
	Test a legend attribute.

void	setData (QwtSeriesData< QwtPointPolar > *data)
	Set the data.

const QwtSeriesData< QwtPointPolar > *	data () const
	Get the data.

size_t	dataSize () const
	Get the data size.

QwtPointPolar	sample (int i) const
	Get a sample.

void	setPen (const QPen &)
	Set the pen.

const QPen &	pen () const
	Get the pen.

void	setStyle (CurveStyle style)
	Set the curve style.

CurveStyle	style () const
	Get the curve style.

void	setSymbol (QwtSymbol *)
	Set the symbol.

const QwtSymbol *	symbol () const
	Get the symbol.

void	setCurveFitter (QwtCurveFitter *)
	Set the curve fitter.

QwtCurveFitter *	curveFitter () const
	Get the curve fitter.

virtual void	draw (QPainter *p, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, double radius, const QRectF &canvasRect) const override
	Draw the curve.

virtual void	draw (QPainter *p, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, int from, int to) const
	Draw the curve from index to index.

virtual QwtInterval	boundingInterval (int scaleId) const override
	Get the bounding interval for a scale.

virtual QwtGraphic	legendIcon (int index, const QSizeF &) const override
	Get the legend icon.

Public Member Functions inherited from QwtPolarItem
	QwtPolarItem (const QwtText &title=QwtText())
	Constructor.

virtual	~QwtPolarItem ()
	Destructor.

void	attach (QwtPolarPlot *plot)
	Attach the item to a plot.

void	detach ()
	Detach the item from its plot.

QwtPolarPlot *	plot () const
	Get the attached plot.

void	setTitle (const QString &title)
	Set the title from a QString.

void	setTitle (const QwtText &title)
	Set the title from a QwtText.

const QwtText &	title () const
	Get the title.

void	setItemAttribute (ItemAttribute, bool on=true)
	Set an item attribute.

bool	testItemAttribute (ItemAttribute) const
	Test an item attribute.

void	setRenderHint (RenderHint, bool on=true)
	Set a render hint.

bool	testRenderHint (RenderHint) const
	Test a render hint.

void	setRenderThreadCount (uint numThreads)
	Set the number of render threads.

uint	renderThreadCount () const
	Get the number of render threads.

double	z () const
	Get the z value.

void	setZ (double z)
	Set the z value.

void	show ()
	Show the item.

void	hide ()
	Hide the item.

virtual void	setVisible (bool)
	Set the visibility.

bool	isVisible () const
	Get the visibility.

virtual void	itemChanged ()
	Update the item and trigger autoRefresh.

virtual void	legendChanged ()
	Update the legend.

virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &, const QwtInterval &)
	Update the scale division.

virtual int	marginHint () const
	Get the margin hint.

void	setLegendIconSize (const QSize &)
	Set the legend icon size.

QSize	legendIconSize () const
	Get the legend icon size.

virtual QList< QwtLegendData >	legendData () const
	Get the legend data.

Protected Member Functions
void	init ()
	Initialize the curve.

virtual void	drawCurve (QPainter *, int style, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, int from, int to) const
	Draw the curve.

virtual void	drawSymbols (QPainter *, const QwtSymbol &, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, int from, int to) const
	Draw the symbols.

void	drawLines (QPainter *, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, int from, int to) const
	Draw the lines.

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

◆ CurveStyle

enum QwtPolarCurve::CurveStyle

Curve styles.

See also: setStyle(), style()

Enumerator
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().
UserCurve	Values > 100 are reserved for user specific curve styles.

◆ LegendAttribute

enum QwtPolarCurve::LegendAttribute

Attributes how to represent the curve on the legend.

If none of the flags is activated QwtPlotCurve tries to find a color representing the curve and paints a rectangle with it. In the default setting all attributes are off.

See also: setLegendAttribute(), testLegendAttribute()

Enumerator
LegendShowLine	If the curveStyle() is not NoCurve a line is painted with the curvePen().
LegendShowSymbol	If the curve has a valid symbol it is painted.

Constructor & Destructor Documentation

◆ QwtPolarCurve() [1/2]

QwtPolarCurve::QwtPolarCurve ( const QwtText & title )

explicit

Constructor with title.

Parameters

title Title of the curve

◆ QwtPolarCurve() [2/2]

QwtPolarCurve::QwtPolarCurve ( const QString & title )

explicit

Constructor with title string.

Parameters

title Title of the curve as string

Member Function Documentation

◆ boundingInterval()

QwtInterval QwtPolarCurve::boundingInterval ( int scaleId ) const

overridevirtual

Get the bounding interval for a scale.

Get the bounding interval necessary to display the item.

Parameters

scaleId Scale index

Returns: Bounding interval

This interval can be useful for operations like clipping or autoscaling.

See also: QwtData::boundingRect()

Reimplemented from QwtPolarItem.

◆ curveFitter()

QwtCurveFitter * QwtPolarCurve::curveFitter ( ) const

Get the curve fitter.

Returns: The curve fitter

See also: setCurveFitter()

◆ data()

const QwtSeriesData< QwtPointPolar > * QwtPolarCurve::data ( ) const

inline

Get the data.

Returns: the the curve data

◆ dataSize()

size_t QwtPolarCurve::dataSize ( ) const

Get the data size.

Get the number of data points.

Returns: Number of points

See also: setData()

◆ draw() [1/2]

void QwtPolarCurve::draw	(	QPainter *	painter,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QPointF &	pole,
		double	radius,
		const QRectF &	canvasRect
	)		const

overridevirtual

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.

◆ draw() [2/2]

void QwtPolarCurve::draw	(	QPainter *	painter,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QPointF &	pole,
		int	from,
		int	to
	)		const

virtual

Draw the curve from index to index.

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()

◆ drawCurve()

void QwtPolarCurve::drawCurve	(	QPainter *	painter,
		int	style,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QPointF &	pole,
		int	from,
		int	to
	)		const

protectedvirtual

Draw the curve.

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()

◆ drawLines()

void QwtPolarCurve::drawLines	(	QPainter *	painter,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QPointF &	pole,
		int	from,
		int	to
	)		const

protected

Draw the lines.

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()

◆ drawSymbols()

void QwtPolarCurve::drawSymbols	(	QPainter *	painter,
		const QwtSymbol &	symbol,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QPointF &	pole,
		int	from,
		int	to
	)		const

protectedvirtual

Draw the symbols.

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()

◆ init()

void QwtPolarCurve::init ( )

protected

Initialize the curve.

Initialize data members.

◆ legendIcon()

QwtGraphic QwtPolarCurve::legendIcon	(	int	index,
		const QSizeF &	size
	)		const

overridevirtual

Get the legend icon.

Get the icon representing the curve on the legend.

Parameters

index	Index of the legend entry (ignored as there is only one)
size	Icon size

Returns: Icon representing the curve on the legend

See also: QwtPolarItem::setLegendIconSize(), QwtPolarItem::legendData()

Reimplemented from QwtPolarItem.

◆ pen()

const QPen & QwtPolarCurve::pen ( ) const

Get the pen.

Get the pen used to draw the lines.

Returns: Pen used to draw the lines

See also: setPen()

◆ rtti()

int QwtPolarCurve::rtti ( ) const

overridevirtual

Get the runtime type information.

Returns: QwtPolarCurve::Rtti_PolarCurve

Reimplemented from QwtPolarItem.

◆ sample()

QwtPointPolar QwtPolarCurve::sample ( int i ) const

inline

Get a sample.

Parameters

i index

Returns: point at position i

◆ setCurveFitter()

void QwtPolarCurve::setCurveFitter ( QwtCurveFitter * curveFitter )

Set the curve fitter.

Insert a curve fitter.

Parameters

curveFitter Curve fitter (ownership is transferred)

A curve fitter interpolates the curve points. For example, QwtPolarFitter adds equidistant points so that the connection gets rounded instead of having straight lines. If curveFitter is nullptr, fitting is disabled.

See also: curveFitter()

◆ setData()

void QwtPolarCurve::setData ( QwtSeriesData< QwtPointPolar > * data )

Set the data.

Initialize data with a pointer to QwtSeriesData<QwtPointPolar>

Parameters

data	Series data. The x-values represent azimuth, y-values represent radius.

Ownership of the data is transferred to the curve.

See also: data()

◆ setLegendAttribute()

void QwtPolarCurve::setLegendAttribute	(	LegendAttribute	attribute,
		bool	on = `true`
	)

Set a legend attribute.

Specify an attribute for how to draw the legend identifier.

Parameters

attribute	Legend attribute to set
on	True to enable, false to disable

See also: LegendAttribute, testLegendAttribute()

◆ setPen()

void QwtPolarCurve::setPen ( const QPen & pen )

Set the pen.

Assign a pen.

Parameters

pen New pen

See also: pen()

◆ setStyle()

void QwtPolarCurve::setStyle ( CurveStyle style )

Set the curve style.

Set the curve's drawing style.

Parameters

style Curve style

See also: CurveStyle, style()

◆ setSymbol()

void QwtPolarCurve::setSymbol ( QwtSymbol * symbol )

Set the symbol.

Assign a symbol.

Parameters

symbol New symbol (ownership is transferred)

See also: symbol()

◆ style()

QwtPolarCurve::CurveStyle QwtPolarCurve::style ( ) const

Get the curve style.

Get the current style.

Returns: Current style

See also: CurveStyle, setStyle()

◆ symbol()

const QwtSymbol * QwtPolarCurve::symbol ( ) const

Get the symbol.

Get the current symbol.

Returns: The current symbol

See also: setSymbol()

◆ testLegendAttribute()

bool QwtPolarCurve::testLegendAttribute ( LegendAttribute attribute ) const

Test a legend attribute.

Test if a legend attribute is enabled.

Parameters

attribute Legend attribute to test

Returns: True if attribute is enabled

See also: LegendAttribute, setLegendAttribute()

The documentation for this class was generated from the following files:

/home/runner/work/QWT/QWT/src/plot/qwt_polar_curve.h
/home/runner/work/QWT/QWT/src/plot/qwt_polar_curve.cpp

Classes

Public Types

Public Member Functions

Protected Member Functions

Detailed Description

Member Enumeration Documentation

◆ CurveStyle

◆ LegendAttribute

Constructor & Destructor Documentation

◆ QwtPolarCurve() [1/2]

◆ QwtPolarCurve() [2/2]

Member Function Documentation

◆ boundingInterval()

◆ curveFitter()

◆ data()

◆ dataSize()

◆ draw() [1/2]

◆ draw() [2/2]

◆ drawCurve()

◆ drawLines()

◆ drawSymbols()

◆ init()

◆ legendIcon()

◆ pen()

◆ rtti()

◆ sample()

◆ setCurveFitter()

◆ setData()

◆ setLegendAttribute()

◆ setPen()

◆ setStyle()

◆ setSymbol()

◆ style()

◆ symbol()

◆ testLegendAttribute()