A class for drawing markers. More...

#include <qwt_polar_marker.h>

Inheritance diagram for QwtPolarMarker:

Classes
class	PrivateData

Public Member Functions
	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 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.

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

Additional Inherited Members
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...

Detailed Description

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.

Constructor & Destructor Documentation

◆ QwtPolarMarker()

QwtPolarMarker::QwtPolarMarker ( )

explicit

Constructor.

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

Destructor

Member Function Documentation

◆ boundingInterval()

QwtInterval QwtPolarMarker::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 (equals position)

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

See also: position()

Reimplemented from 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.

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.

◆ label()

QwtText QwtPolarMarker::label ( ) const

Get the label.

Get the label text.

Returns: The label text

See also: setLabel()

◆ labelAlignment()

Qt::Alignment QwtPolarMarker::labelAlignment ( ) const

Get the label alignment.

Returns: The label alignment

See also: setLabelAlignment()

◆ position()

QwtPointPolar QwtPolarMarker::position ( ) const

Get the position.

Get the position of the marker.

Returns: Position of the marker

See also: setPosition()

◆ rtti()

int QwtPolarMarker::rtti ( ) const

overridevirtual

Get the runtime type information.

Returns: QwtPolarItem::Rtti_PolarMarker

Reimplemented from QwtPolarItem.

◆ setLabel()

void QwtPolarMarker::setLabel ( const QwtText & label )

Set the label.

Set the label text.

Parameters

label Label text

See also: label()

◆ setLabelAlignment()

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

Set the label alignment.

Set the alignment of the label.

Parameters

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.

See also: labelAlignment()

◆ setPosition()

void QwtPolarMarker::setPosition ( const QwtPointPolar & pos )

Set the position.

Set the position of the marker.

Parameters

pos	New position of the marker

See also: position()

◆ setSymbol()

void QwtPolarMarker::setSymbol ( const QwtSymbol * symbol )

Set the symbol.

Assign a symbol.

Parameters

symbol New symbol (ownership is transferred)

See also: symbol(), QwtSymbol

◆ symbol()

const QwtSymbol * QwtPolarMarker::symbol ( ) const

Get the symbol.

Get the current symbol.

Returns: The current symbol

See also: setSymbol(), QwtSymbol

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

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

Classes

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QwtPolarMarker()

Member Function Documentation

◆ boundingInterval()

◆ draw()

◆ label()

◆ labelAlignment()

◆ position()

◆ rtti()

◆ setLabel()

◆ setLabelAlignment()

◆ setPosition()

◆ setSymbol()

◆ symbol()