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

#include <qwt_polar_curve.h>

类 QwtPolarCurve 继承关系图:

类
class	PrivateData

Public 类型
enum	CurveStyle { NoCurve , Lines , UserCurve = 100 }
	Curve styles 更多...

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

Public 类型继承自 QwtPolarItem
enum	RttiValues { Rtti_PolarItem = 0 , Rtti_PolarGrid , Rtti_PolarMarker , Rtti_PolarCurve , Rtti_PolarSpectrogram , Rtti_PolarUserItem = 1000 }
	Runtime type information 更多...

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

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

Public 成员函数
	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 成员函数继承自 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 成员函数
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

详细描述

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.

参见: QwtPolarPlot, QwtSymbol, QwtScaleMap

成员枚举类型说明

◆ CurveStyle

enum QwtPolarCurve::CurveStyle

Curve styles

参见: setStyle(), style()

枚举值
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.

参见: setLegendAttribute(), testLegendAttribute()

枚举值
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.

构造及析构函数说明

◆ QwtPolarCurve() [1/2]

QwtPolarCurve::QwtPolarCurve ( const QwtText & title )

explicit

Constructor with title

参数

title Title of the curve

◆ QwtPolarCurve() [2/2]

QwtPolarCurve::QwtPolarCurve ( const QString & title )

explicit

Constructor with title string

参数

title Title of the curve as string

成员函数说明

◆ boundingInterval()

QwtInterval QwtPolarCurve::boundingInterval ( int scaleId ) const

overridevirtual

Get the bounding interval for a scale

Get the bounding interval necessary to display the item

参数

scaleId Scale index

返回: Bounding interval

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

参见: QwtData::boundingRect()

重载 QwtPolarItem .

◆ curveFitter()

QwtCurveFitter * QwtPolarCurve::curveFitter ( ) const

Get the curve fitter

返回: The curve fitter

参见: setCurveFitter()

◆ data()

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

inline

Get the data

返回: the the curve data

◆ dataSize()

size_t QwtPolarCurve::dataSize ( ) const

Get the data size

Get the number of data points

返回: Number of points

参见: 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

参数

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

实现了 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

参数

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.

参见: 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.

参数

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.

参见: 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

参数

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.

参见: 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

参数

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.

参见: 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

参数

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

返回: Icon representing the curve on the legend

参见: QwtPolarItem::setLegendIconSize(), QwtPolarItem::legendData()

重载 QwtPolarItem .

◆ pen()

const QPen & QwtPolarCurve::pen ( ) const

Get the pen

Get the pen used to draw the lines

返回: Pen used to draw the lines

参见: setPen()

◆ rtti()

int QwtPolarCurve::rtti ( ) const

overridevirtual

Get the runtime type information

返回: QwtPolarCurve::Rtti_PolarCurve

重载 QwtPolarItem .

◆ sample()

QwtPointPolar QwtPolarCurve::sample ( int i ) const

inline

Get a sample

参数

i index

返回: point at position i

◆ setCurveFitter()

void QwtPolarCurve::setCurveFitter ( QwtCurveFitter * curveFitter )

Set the curve fitter

Insert a curve fitter

参数

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.

参见: curveFitter()

◆ setData()

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

Set the data

Initialize data with a pointer to QwtSeriesData<QwtPointPolar>

参数

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

Ownership of the data is transferred to the curve.

参见: data()

◆ setLegendAttribute()

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

Set a legend attribute

Specify an attribute for how to draw the legend identifier

参数

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

参见: LegendAttribute, testLegendAttribute()

◆ setPen()

void QwtPolarCurve::setPen ( const QPen & pen )

Set the pen

Assign a pen

参数

pen New pen

参见: pen()

◆ setStyle()

void QwtPolarCurve::setStyle ( CurveStyle style )

Set the curve style

Set the curve's drawing style

参数

style Curve style

参见: CurveStyle, style()

◆ setSymbol()

void QwtPolarCurve::setSymbol ( QwtSymbol * symbol )

Set the symbol

Assign a symbol

参数

symbol New symbol (ownership is transferred)

参见: symbol()

◆ style()

QwtPolarCurve::CurveStyle QwtPolarCurve::style ( ) const

Get the curve style

Get the current style

返回: Current style

参见: CurveStyle, setStyle()

◆ symbol()

const QwtSymbol * QwtPolarCurve::symbol ( ) const

Get the symbol

Get the current symbol

返回: The current symbol

参见: setSymbol()

◆ testLegendAttribute()

bool QwtPolarCurve::testLegendAttribute ( LegendAttribute attribute ) const

Test a legend attribute

Test if a legend attribute is enabled

参数

attribute Legend attribute to test

返回: True if attribute is enabled

参见: LegendAttribute, setLegendAttribute()

该类的文档由以下文件生成:

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

类

Public 类型

Public 成员函数

Protected 成员函数

详细描述

成员枚举类型说明

◆ CurveStyle

◆ LegendAttribute

构造及析构函数说明

◆ QwtPolarCurve() [1/2]

◆ QwtPolarCurve() [2/2]

成员函数说明

◆ 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()