A class for drawing markers 更多...

#include <qwt_polar_marker.h>

类 QwtPolarMarker 继承关系图:

类
class	PrivateData

Public 成员函数
	QwtPolarMarker ()
	Constructor

	~QwtPolarMarker () override
	Destructor

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

void	setPosition (const QwtPointPolar &)
	Set the position

QwtPointPolar	position () const
	Get the position

void	setSymbol (const QwtSymbol *s)
	Set the symbol

const QwtSymbol *	symbol () const
	Get the symbol

void	setLabel (const QwtText &)
	Set the label

QwtText	label () const
	Get the label

void	setLabelAlignment (Qt::Alignment)
	Set the label alignment

Qt::Alignment	labelAlignment () const
	Get the label alignment

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

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

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

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

额外继承的成员函数
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...

详细描述

A class for drawing markers

A marker can be a a symbol, a label or a combination of them, which can be drawn around a center point inside a bounding rectangle.

The setSymbol() member assigns a symbol to the marker. The symbol is drawn at the specified point.

With setLabel(), a label can be assigned to the marker. The setLabelAlignment() member specifies where the label is drawn. All the Align*-constants in Qt::AlignmentFlags (see Qt documentation) are valid. The alignment refers to the center point of the marker, which means, for example, that the label would be painted left above the center point if the alignment was set to AlignLeft|AlignTop.

构造及析构函数说明

◆ QwtPolarMarker()

QwtPolarMarker::QwtPolarMarker ( )

explicit

Constructor

Sets alignment to Qt::AlignCenter, and style to NoLine.

Destructor

成员函数说明

◆ boundingInterval()

QwtInterval QwtPolarMarker::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 (equals position)

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

参见: position()

重载 QwtPolarItem .

◆ draw()

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

overridevirtual

Draw the marker

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.

◆ label()

QwtText QwtPolarMarker::label ( ) const

Get the label

Get the label text

返回: The label text

参见: setLabel()

◆ labelAlignment()

Qt::Alignment QwtPolarMarker::labelAlignment ( ) const

Get the label alignment

返回: The label alignment

参见: setLabelAlignment()

◆ position()

QwtPointPolar QwtPolarMarker::position ( ) const

Get the position

Get the position of the marker

返回: Position of the marker

参见: setPosition()

◆ rtti()

int QwtPolarMarker::rtti ( ) const

overridevirtual

Get the runtime type information

返回: QwtPolarItem::Rtti_PolarMarker

重载 QwtPolarItem .

◆ setLabel()

void QwtPolarMarker::setLabel ( const QwtText & label )

Set the label

Set the label text

参数

label Label text

参见: label()

◆ setLabelAlignment()

void QwtPolarMarker::setLabelAlignment ( Qt::Alignment align )

Set the label alignment

Set the alignment of the label

参数

align Alignment. A combination of AlignTop, AlignBottom, AlignLeft, AlignRight, AlignCenter, AlignHCenter, AlignVCenter.

The alignment determines where the label is drawn relative to the marker's position.

参见: labelAlignment()

◆ setPosition()

void QwtPolarMarker::setPosition ( const QwtPointPolar & pos )

Set the position

Set the position of the marker

参数

pos	New position of the marker

参见: position()

◆ setSymbol()

void QwtPolarMarker::setSymbol ( const QwtSymbol * symbol )

Set the symbol

Assign a symbol

参数

symbol New symbol (ownership is transferred)

参见: symbol(), QwtSymbol

◆ symbol()

const QwtSymbol * QwtPolarMarker::symbol ( ) const

Get the symbol

Get the current symbol

返回: The current symbol

参见: setSymbol(), QwtSymbol

该类的文档由以下文件生成:

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

类

Public 成员函数

额外继承的成员函数

详细描述

构造及析构函数说明

◆ QwtPolarMarker()

成员函数说明

◆ boundingInterval()

◆ draw()

◆ label()

◆ labelAlignment()

◆ position()

◆ rtti()

◆ setLabel()

◆ setLabelAlignment()

◆ setPosition()

◆ setSymbol()

◆ symbol()