A plotting widget, displaying a polar coordinate system. More...

#include <qwt_polar_plot.h>

Inheritance diagram for QwtPolarPlot:

Classes
class	PrivateData

Public Types
enum	LegendPosition { LeftLegend , RightLegend , BottomLegend , TopLegend , ExternalLegend }
	Position of the legend, relative to the canvas. More...

Public Slots
virtual void	replot ()
	Replot the plot.

void	autoRefresh ()
	Auto refresh the plot.

void	setAzimuthOrigin (double)
	Set the azimuth origin.

Signals
void	itemAttached (QwtPolarItem *plotItem, bool on)
	A signal indicating, that an item has been attached/detached 表示绘图项已附加/分离的信号

void	legendDataChanged (const QVariant &itemInfo, const QList< QwtLegendData > &data)
	A signal with the attributes how to update the legend entries for a plot item 包含如何更新绘图项图例条目属性的信号

void	layoutChanged ()
	A signal that is emitted, whenever the layout of the plot has been recalculated 当绘图的布局重新计算时发出的信号

Public Member Functions
	QwtPolarPlot (QWidget *parent=nullptr)
	Constructor.

	QwtPolarPlot (const QwtText &title, QWidget *parent=nullptr)
	Constructor with title.

virtual	~QwtPolarPlot ()
	Destructor.

void	setTitle (const QString &)
	Set the title.

void	setTitle (const QwtText &)
	Set the title.

QwtText	title () const
	Get the title.

QwtTextLabel *	titleLabel ()
	Get the title label.

const QwtTextLabel *	titleLabel () const
	Get the title label (const version)

void	setAutoReplot (bool tf=true)
	Set auto replot.

bool	autoReplot () const
	Get auto replot.

void	setAutoScale (int scaleId)
	Set auto scale for a scale.

bool	hasAutoScale (int scaleId) const
	Check if a scale has auto scale.

void	setScaleMaxMinor (int scaleId, int maxMinor)
	Set the maximum number of minor ticks for a scale.

int	scaleMaxMinor (int scaleId) const
	Get the maximum number of minor ticks for a scale.

int	scaleMaxMajor (int scaleId) const
	Get the maximum number of major ticks for a scale.

void	setScaleMaxMajor (int scaleId, int maxMajor)
	Set the maximum number of major ticks for a scale.

QwtScaleEngine *	scaleEngine (int scaleId)
	Get the scale engine for a scale.

const QwtScaleEngine *	scaleEngine (int scaleId) const
	Get the scale engine for a scale (const version)

void	setScaleEngine (int scaleId, QwtScaleEngine *)
	Set the scale engine for a scale.

void	setScale (int scaleId, double min, double max, double step=0)
	Set the scale for a scale.

void	setScaleDiv (int scaleId, const QwtScaleDiv &)
	Set the scale division for a scale.

const QwtScaleDiv *	scaleDiv (int scaleId) const
	Get the scale division for a scale (const version)

QwtScaleDiv *	scaleDiv (int scaleId)
	Get the scale division for a scale.

QwtScaleMap	scaleMap (int scaleId, double radius) const
	Get the scale map for a scale with radius.

QwtScaleMap	scaleMap (int scaleId) const
	Get the scale map for a scale.

void	updateScale (int scaleId)
	Update a scale.

double	azimuthOrigin () const
	Get the azimuth origin.

void	zoom (const QwtPointPolar &, double factor)
	Zoom to a position with a factor.

void	unzoom ()
	Unzoom the plot.

QwtPointPolar	zoomPos () const
	Get the zoom position.

double	zoomFactor () const
	Get the zoom factor.

QwtPolarCanvas *	canvas ()
	Get the canvas.

const QwtPolarCanvas *	canvas () const
	Get the canvas (const version)

void	setPlotBackground (const QBrush &c)
	Set the plot background.

const QBrush &	plotBackground () const
	Get the plot background.

virtual void	drawCanvas (QPainter *, const QRectF &) const
	Draw the canvas.

void	insertLegend (QwtAbstractLegend *, LegendPosition=RightLegend, double ratio=-1.0)
	Insert a legend.

QwtAbstractLegend *	legend ()
	Get the legend.

const QwtAbstractLegend *	legend () const
	Get the legend (const version)

void	updateLegend ()
	Update the legend.

void	updateLegend (const QwtPolarItem *)
	Update the legend for an item.

QwtPolarLayout *	plotLayout ()
	Get the plot layout.

const QwtPolarLayout *	plotLayout () const
	Get the plot layout (const version)

QwtInterval	visibleInterval () const
	Get the visible interval.

QRectF	plotRect () const
	Get the plot rectangle.

QRectF	plotRect (const QRectF &) const
	Get the plot rectangle for a given rectangle.

int	plotMarginHint () const
	Get the plot margin hint.

virtual QVariant	itemToInfo (QwtPolarItem *) const
	Convert an item to info.

virtual QwtPolarItem *	infoToItem (const QVariant &) const
	Convert info to an item.

Public Member Functions inherited from QwtPolarItemDict
	QwtPolarItemDict ()
	Constructor.

	~QwtPolarItemDict ()
	Destructor.

void	setAutoDelete (bool)
	Set auto delete.

bool	autoDelete () const
	Get auto delete.

const QwtPolarItemList &	itemList () const
	Get the item list.

void	detachItems (int rtti=QwtPolarItem::Rtti_PolarItem, bool autoDelete=true)
	Detach items.

Protected Member Functions
virtual bool	event (QEvent *) override
	Handle events.

virtual void	resizeEvent (QResizeEvent *) override
	Handle resize events.

virtual void	updateLayout ()
	Update the layout.

virtual void	drawItems (QPainter *painter, const QwtScaleMap &radialMap, const QwtScaleMap &azimuthMap, const QPointF &pole, double radius, const QRectF &canvasRect) const
	Draw items.

Protected Member Functions inherited from QwtPolarItemDict
void	insertItem (QwtPolarItem *)
	Insert an item.

void	removeItem (QwtPolarItem *)
	Remove an item.

Properties
QBrush	plotBackground

double	azimuthOrigin

Friends
class	QwtPolarItem

Detailed Description

A plotting widget, displaying a polar coordinate system.

Member Enumeration Documentation

◆ LegendPosition

enum QwtPolarPlot::LegendPosition

Position of the legend, relative to the canvas.

Enumerator
LeftLegend	The legend will be left from the canvas.
RightLegend	The legend will be right from the canvas.
BottomLegend	The legend will be below the canvas.
TopLegend	The legend will be between canvas and title.
ExternalLegend	External means that only the content of the legend will be handled by QwtPlot, but not its geometry. This might be interesting if an application wants to have a legend in an external window ( or on the canvas ). Note The legend is not painted by QwtPolarRenderer

Constructor & Destructor Documentation

◆ QwtPolarPlot() [1/2]

QwtPolarPlot::QwtPolarPlot ( QWidget * parent = nullptr )

explicit

Constructor.

◆ QwtPolarPlot() [2/2]

QwtPolarPlot::QwtPolarPlot	(	const QwtText &	title,
		QWidget *	parent = `nullptr`
	)

Constructor with title.

◆ ~QwtPolarPlot()

QwtPolarPlot::~QwtPolarPlot ( )

virtual

Destructor.

Destructor

.

Member Function Documentation

◆ autoRefresh

void QwtPolarPlot::autoRefresh ( )

slot

Auto refresh the plot.

Replots the plot if autoReplot() is true

.

◆ autoReplot()

bool QwtPolarPlot::autoReplot ( ) const

Get auto replot.

Check if autoReplot option is set.

◆ azimuthOrigin()

double QwtPolarPlot::azimuthOrigin ( ) const

Get the azimuth origin.

Get the origin of the azimuth scale.

◆ canvas() [1/2]

QwtPolarCanvas * QwtPolarPlot::canvas ( )

Get the canvas.

Get the plot's canvas.

◆ canvas() [2/2]

const QwtPolarCanvas * QwtPolarPlot::canvas ( ) const

Get the canvas (const version)

Get the plot's canvas (const version)

◆ drawCanvas()

void QwtPolarPlot::drawCanvas	(	QPainter *	painter,
		const QRectF &	canvasRect
	)		const

virtual

Draw the canvas.

Redraw the canvas.

◆ drawItems()

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

protectedvirtual

Draw items.

Redraw the canvas items.

◆ event()

bool QwtPolarPlot::event ( QEvent * e )

overrideprotectedvirtual

Handle events.

Qt event handler.

◆ hasAutoScale()

bool QwtPolarPlot::hasAutoScale ( int scaleId ) const

Check if a scale has auto scale.

Check if autoscaling is enabled.

◆ infoToItem()

QwtPolarItem * QwtPolarPlot::infoToItem ( const QVariant & itemInfo ) const

virtual

Convert info to an item.

Identify the plot item according to an item info object.

◆ insertLegend()

void QwtPolarPlot::insertLegend	(	QwtAbstractLegend *	legend,
		QwtPolarPlot::LegendPosition	pos = `RightLegend`,
		double	ratio = `-1.0`
	)

Insert a legend.

◆ itemAttached

void QwtPolarPlot::itemAttached	(	QwtPolarItem *	plotItem,
		bool	on
	)

signal

A signal indicating, that an item has been attached/detached 表示绘图项已附加/分离的信号

Parameters

plotItem	Plot item / 绘图项
on	Attached/Detached / 附加/分离

◆ itemToInfo()

QVariant QwtPolarPlot::itemToInfo ( QwtPolarItem * plotItem ) const

virtual

Convert an item to info.

Build an information object to identify a plot item on the legend.

◆ legend() [1/2]

QwtAbstractLegend * QwtPolarPlot::legend ( )

Get the legend.

Get the plot's legend.

◆ legend() [2/2]

const QwtAbstractLegend * QwtPolarPlot::legend ( ) const

Get the legend (const version)

Get the plot's legend (const version)

◆ legendDataChanged

void QwtPolarPlot::legendDataChanged	(	const QVariant &	itemInfo,
		const QList< QwtLegendData > &	data
	)

signal

A signal with the attributes how to update the legend entries for a plot item 包含如何更新绘图项图例条目属性的信号

Parameters

itemInfo	Info about a plot, build from itemToInfo() / 关于绘图的信息，由 itemToInfo() 构建
data	Attributes of the entries ( usually <= 1 ) for the plot item / 绘图项的条目属性（通常 <= 1）

See also: itemToInfo(), infoToItem(), QwtAbstractLegend::updateLegend()

◆ plotBackground()

const QBrush & QwtPolarPlot::plotBackground ( ) const

Get the plot background.

Get the plot background brush.

◆ plotLayout() [1/2]

QwtPolarLayout * QwtPolarPlot::plotLayout ( )

Get the plot layout.

Get the layout responsible for geometry of plot components.

◆ plotLayout() [2/2]

const QwtPolarLayout * QwtPolarPlot::plotLayout ( ) const

Get the plot layout (const version)

Get the layout responsible for geometry of plot components (const version)

◆ plotMarginHint()

int QwtPolarPlot::plotMarginHint ( ) const

Get the plot margin hint.

Get the maximum of all item margin hints.

◆ plotRect() [1/2]

QRectF QwtPolarPlot::plotRect ( ) const

Get the plot rectangle.

Get the bounding rect of the plot area.

◆ plotRect() [2/2]

QRectF QwtPolarPlot::plotRect ( const QRectF & canvasRect ) const

Get the plot rectangle for a given rectangle.

Calculate the bounding rect of the plot area.

◆ replot

void QwtPolarPlot::replot ( )

virtualslot

Replot the plot.

Redraw the plot.

◆ resizeEvent()

void QwtPolarPlot::resizeEvent ( QResizeEvent * e )

overrideprotectedvirtual

Handle resize events.

Resize and update internal layout.

◆ scaleDiv() [1/2]

QwtScaleDiv * QwtPolarPlot::scaleDiv ( int scaleId )

Get the scale division for a scale.

Return the scale division of a specified scale.

◆ scaleDiv() [2/2]

const QwtScaleDiv * QwtPolarPlot::scaleDiv ( int scaleId ) const

Get the scale division for a scale (const version)

Return the scale division of a specified scale.

◆ scaleEngine() [1/2]

QwtScaleEngine * QwtPolarPlot::scaleEngine ( int scaleId )

Get the scale engine for a scale.

Get scale engine for a specific scale.

◆ scaleEngine() [2/2]

const QwtScaleEngine * QwtPolarPlot::scaleEngine ( int scaleId ) const

Get the scale engine for a scale (const version)

Get scale engine for a specific scale (const version)

◆ scaleMap() [1/2]

QwtScaleMap QwtPolarPlot::scaleMap ( int scaleId ) const

Get the scale map for a scale.

Build a scale map.

◆ scaleMap() [2/2]

QwtScaleMap QwtPolarPlot::scaleMap	(	int	scaleId,
		double	radius
	)		const

Get the scale map for a scale with radius.

Build a scale map with specified radius.

◆ scaleMaxMajor()

int QwtPolarPlot::scaleMaxMajor ( int scaleId ) const

Get the maximum number of major ticks for a scale.

Get the maximum number of major ticks for a specified axis.

◆ scaleMaxMinor()

int QwtPolarPlot::scaleMaxMinor ( int scaleId ) const

Get the maximum number of minor ticks for a scale.

Get the maximum number of minor ticks for a specified axis.

◆ setAutoReplot()

void QwtPolarPlot::setAutoReplot ( bool enable = true )

Set auto replot.

Set or reset the autoReplot option.

◆ setAutoScale()

void QwtPolarPlot::setAutoScale ( int scaleId )

Set auto scale for a scale.

Enable autoscaling.

◆ setAzimuthOrigin

void QwtPolarPlot::setAzimuthOrigin ( double origin )

slot

Set the azimuth origin.

Change the origin of the azimuth scale.

◆ setPlotBackground()

void QwtPolarPlot::setPlotBackground ( const QBrush & brush )

Set the plot background.

Set the background of the plot area.

◆ setScale()

void QwtPolarPlot::setScale	(	int	scaleId,
		double	min,
		double	max,
		double	stepSize = `0`
	)

Set the scale for a scale.

Disable autoscaling and specify a fixed scale for a selected scale.

◆ setScaleDiv()

void QwtPolarPlot::setScaleDiv	(	int	scaleId,
		const QwtScaleDiv &	scaleDiv
	)

Set the scale division for a scale.

Disable autoscaling and specify a fixed scale for a selected scale.

◆ setScaleEngine()

void QwtPolarPlot::setScaleEngine	(	int	scaleId,
		QwtScaleEngine *	scaleEngine
	)

Set the scale engine for a scale.

Change the scale engine for an axis.

◆ setScaleMaxMajor()

void QwtPolarPlot::setScaleMaxMajor	(	int	scaleId,
		int	maxMajor
	)

Set the maximum number of major ticks for a scale.

Set the maximum number of major scale intervals for a specified scale.

◆ setScaleMaxMinor()

void QwtPolarPlot::setScaleMaxMinor	(	int	scaleId,
		int	maxMinor
	)

Set the maximum number of minor ticks for a scale.

Set the maximum number of minor scale intervals for a specified scale.

◆ setTitle() [1/2]

void QwtPolarPlot::setTitle ( const QString & title )

Set the title.

Change the plot's title.

◆ setTitle() [2/2]

void QwtPolarPlot::setTitle ( const QwtText & title )

Set the title.

Change the plot's title.

◆ title()

QwtText QwtPolarPlot::title ( ) const

Get the title.

Get the plot's title.

◆ titleLabel() [1/2]

QwtTextLabel * QwtPolarPlot::titleLabel ( )

Get the title label.

Get the title label widget.

◆ titleLabel() [2/2]

const QwtTextLabel * QwtPolarPlot::titleLabel ( ) const

Get the title label (const version)

Get the title label widget (const version)

◆ unzoom()

void QwtPolarPlot::unzoom ( )

Unzoom the plot.

◆ updateLayout()

void QwtPolarPlot::updateLayout ( )

protectedvirtual

Update the layout.

Rebuild the layout

.

◆ updateLegend() [1/2]

void QwtPolarPlot::updateLegend ( )

Update the legend.

Emit legendDataChanged() for all plot items.

◆ updateLegend() [2/2]

void QwtPolarPlot::updateLegend ( const QwtPolarItem * plotItem )

Update the legend for an item.

Emit legendDataChanged() for a plot item.

◆ updateScale()

void QwtPolarPlot::updateScale ( int scaleId )

Update a scale.

Rebuild the scale.

◆ visibleInterval()

QwtInterval QwtPolarPlot::visibleInterval ( ) const

Get the visible interval.

Get the bounding interval of the radial scale visible on canvas.

◆ zoom()

void QwtPolarPlot::zoom	(	const QwtPointPolar &	zoomPos,
		double	zoomFactor
	)

Zoom to a position with a factor.

Translate and in/decrease the zoom factor.

◆ zoomFactor()

double QwtPolarPlot::zoomFactor ( ) const

Get the zoom factor.

◆ zoomPos()

QwtPointPolar QwtPolarPlot::zoomPos ( ) const

Get the zoom position.

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

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

Classes

Public Types

Public Slots

Signals

Public Member Functions

Protected Member Functions

Properties

Friends

Detailed Description

Member Enumeration Documentation

◆ LegendPosition

Constructor & Destructor Documentation

◆ QwtPolarPlot() [1/2]

◆ QwtPolarPlot() [2/2]

◆ ~QwtPolarPlot()

Member Function Documentation

◆ autoRefresh

◆ autoReplot()

◆ azimuthOrigin()

◆ canvas() [1/2]

◆ canvas() [2/2]

◆ drawCanvas()

◆ drawItems()

◆ event()

◆ hasAutoScale()

◆ infoToItem()

◆ insertLegend()

◆ itemAttached

◆ itemToInfo()

◆ legend() [1/2]

◆ legend() [2/2]

◆ legendDataChanged

◆ plotBackground()

◆ plotLayout() [1/2]

◆ plotLayout() [2/2]

◆ plotMarginHint()

◆ plotRect() [1/2]

◆ plotRect() [2/2]

◆ replot

◆ resizeEvent()

◆ scaleDiv() [1/2]

◆ scaleDiv() [2/2]

◆ scaleEngine() [1/2]

◆ scaleEngine() [2/2]

◆ scaleMap() [1/2]

◆ scaleMap() [2/2]

◆ scaleMaxMajor()

◆ scaleMaxMinor()

◆ setAutoReplot()

◆ setAutoScale()

◆ setAzimuthOrigin

◆ setPlotBackground()

◆ setScale()

◆ setScaleDiv()

◆ setScaleEngine()

◆ setScaleMaxMajor()

◆ setScaleMaxMinor()

◆ setTitle() [1/2]

◆ setTitle() [2/2]

◆ title()

◆ titleLabel() [1/2]

◆ titleLabel() [2/2]

◆ unzoom()

◆ updateLayout()

◆ updateLegend() [1/2]

◆ updateLegend() [2/2]

◆ updateScale()

◆ visibleInterval()

◆ zoom()

◆ zoomFactor()

◆ zoomPos()