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.

	QwtPolarCurve (const QString &title)
	Constructor.

virtual	~QwtPolarCurve ()
	Destructor.

virtual int	rtti () const QWT_OVERRIDE

void	setLegendAttribute (LegendAttribute, bool on=true)
	Specify an attribute how to draw the legend identifier.

bool	testLegendAttribute (LegendAttribute) const
	Test if a legend attribute is enabled.

void	setData (QwtSeriesData< QwtPointPolar > *data)
	Initialize data with a pointer to QwtSeriesData<QwtPointPolar>.

const QwtSeriesData< QwtPointPolar > *	data () const

size_t	dataSize () const

QwtPointPolar	sample (int i) const

void	setPen (const QPen &)
	Assign a pen.

const QPen &	pen () const

void	setStyle (CurveStyle style)
	Set the curve's drawing style.

CurveStyle	style () const

void	setSymbol (QwtSymbol *)
	Assign a symbol.

const QwtSymbol *	symbol () const

void	setCurveFitter (QwtCurveFitter *)
	Insert a curve fitter.

QwtCurveFitter *	curveFitter () const

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

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

virtual QwtInterval	boundingInterval (int scaleId) const QWT_OVERRIDE
	Interval, that is necessary to display the item This interval can be useful for operations like clipping or autoscaling.

virtual QwtGraphic	legendIcon (int index, const QSizeF &) const QWT_OVERRIDE

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

virtual	~QwtPolarItem ()
	Destroy the QwtPolarItem.

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

void	detach ()
	This method detaches a QwtPolarItem from the QwtPolarPlot it has been associated with.

QwtPolarPlot *	plot () const

void	setTitle (const QString &title)
	Set a new title.

void	setTitle (const QwtText &title)
	Set a new title.

const QwtText &	title () const

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

bool	testItemAttribute (ItemAttribute) const
	Test an item attribute.

void	setRenderHint (RenderHint, bool on=true)
	Toggle an render hint.

bool	testRenderHint (RenderHint) const
	Test a render hint.

void	setRenderThreadCount (uint numThreads)
	On multi core systems rendering of certain plot item ( f.e QwtPolarSpectrogram ) can be done in parallel in several threads.

uint	renderThreadCount () const

double	z () const
	Plot items are painted in increasing z-order.

void	setZ (double z)
	Set the z value.

void	show ()
	Show the item.

void	hide ()
	Hide the item.

virtual void	setVisible (bool)
	Show/Hide the item.

bool	isVisible () const

virtual void	itemChanged ()
	Update the legend and call QwtPolarPlot::autoRefresh for the parent plot.

virtual void	legendChanged ()
	Update the legend of the parent plot.

virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &, const QwtInterval &)
	Update the item to changes of the axes scale division.

virtual int	marginHint () const
	Some items like to display something (f.e.

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

QSize	legendIconSize () const

virtual QList< QwtLegendData >	legendData () const
	Return all information, that is needed to represent the item on the legend.

Protected Member Functions
void	init ()
	Initialize data members.

virtual void	drawCurve (QPainter *, int style, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, int from, int to) const
	Draw the line part (without symbols) of a curve interval.

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

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

Parameters

title title of the curve

◆ QwtPolarCurve() [2/2]

QwtPolarCurve::QwtPolarCurve ( const QString & title )

explicit

Constructor.

Parameters

title title of the curve

Member Function Documentation

◆ boundingInterval()

QwtInterval 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.

◆ curveFitter()

QwtCurveFitter * QwtPolarCurve::curveFitter ( ) const

Returns: The curve fitter

See also: setCurveFitter()

◆ data()

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

inline

Returns: the the curve data

◆ dataSize()

size_t QwtPolarCurve::dataSize ( ) const

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

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.

◆ draw() [2/2]

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

◆ 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 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 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 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()

◆ legendIcon()

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

virtual

Returns: Icon representing the curve on the legend

Parameters

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

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

Reimplemented from QwtPolarItem.

◆ pen()

const QPen & QwtPolarCurve::pen ( ) const

Returns: Pen used to draw the lines

See also: setPen()

◆ rtti()

int QwtPolarCurve::rtti ( ) const

virtual

Returns: QwtPolarCurve::Rtti_PolarCurve

Reimplemented from QwtPolarItem.

◆ sample()

QwtPointPolar QwtPolarCurve::sample ( int i ) const

inline

Parameters

i index

Returns: point at position i

◆ setCurveFitter()

void QwtPolarCurve::setCurveFitter ( QwtCurveFitter * curveFitter )

Insert a curve fitter.

Parameters

curveFitter 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()

◆ setData()

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

Initialize data with a pointer to QwtSeriesData<QwtPointPolar>.

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

Parameters

data Data

◆ setLegendAttribute()

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

Specify an attribute how to draw the legend identifier.

Parameters

attribute	Attribute
on	On/Off /sa LegendAttribute, testLegendAttribute()

◆ setPen()

void QwtPolarCurve::setPen ( const QPen & pen )

Assign a pen.

Parameters

pen New pen

See also: pen()

◆ setStyle()

void QwtPolarCurve::setStyle ( CurveStyle style )

Set the curve's drawing style.

Parameters

style Curve style

See also: CurveStyle, style()

◆ setSymbol()

void QwtPolarCurve::setSymbol ( QwtSymbol * symbol )

Assign a symbol.

Parameters

symbol Symbol

See also: symbol()

◆ style()

QwtPolarCurve::CurveStyle QwtPolarCurve::style ( ) const

Returns: Current style

See also: CurveStyle, setStyle()

◆ symbol()

const QwtSymbol * QwtPolarCurve::symbol ( ) const

Returns: The current symbol

See also: setSymbol()

◆ testLegendAttribute()

bool QwtPolarCurve::testLegendAttribute ( LegendAttribute attribute ) const

Test if a legend attribute is enabled.

Parameters

attribute Legend attribute

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/qwt_polar_curve.h
/home/runner/work/QWT/QWT/src/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()

◆ legendIcon()

◆ pen()

◆ rtti()

◆ sample()

◆ setCurveFitter()

◆ setData()

◆ setLegendAttribute()

◆ setPen()

◆ setStyle()

◆ setSymbol()

◆ style()

◆ symbol()

◆ testLegendAttribute()