A class for drawing markers. More...

#include <qwt_polar_marker.h>

Inheritance diagram for QwtPolarMarker:

Classes
class	PrivateData

Public Member Functions
	QwtPolarMarker ()
	Sets alignment to Qt::AlignCenter, and style to NoLine.

virtual	~QwtPolarMarker ()
	Destructor.

virtual int	rtti () const QWT_OVERRIDE

void	setPosition (const QwtPointPolar &)
	Change the position of the marker.

QwtPointPolar	position () const

void	setSymbol (const QwtSymbol *s)
	Assign a symbol.

const QwtSymbol *	symbol () const

void	setLabel (const QwtText &)
	Set the label.

QwtText	label () const

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

Qt::Alignment	labelAlignment () const

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

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.

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.

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

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.

Member Function Documentation

◆ boundingInterval()

QwtInterval QwtPolarMarker::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 ( == position )

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

virtual

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

Returns: the label

See also: setLabel()

◆ labelAlignment()

Qt::Alignment QwtPolarMarker::labelAlignment ( ) const

Returns: the label alignment

See also: setLabelAlignment()

◆ position()

QwtPointPolar QwtPolarMarker::position ( ) const

Returns: Position of the marker

◆ rtti()

int QwtPolarMarker::rtti ( ) const

virtual

Returns: QwtPolarItem::Rtti_PlotMarker

Reimplemented from QwtPolarItem.

◆ setLabel()

void QwtPolarMarker::setLabel ( const QwtText & label )

Set the label.

Parameters

label label text

See also: label()

◆ setLabelAlignment()

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

Set the alignment of the label.

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

Parameters

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

See also: labelAlignment()

◆ setSymbol()

void QwtPolarMarker::setSymbol ( const QwtSymbol * symbol )

Assign a symbol.

Parameters

symbol New symbol

See also: symbol()

◆ symbol()

const QwtSymbol * QwtPolarMarker::symbol ( ) const

Returns: the symbol

See also: setSymbol(), QwtSymbol

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

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

Classes

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ boundingInterval()

◆ draw()

◆ label()

◆ labelAlignment()

◆ position()

◆ rtti()

◆ setLabel()

◆ setLabelAlignment()

◆ setSymbol()

◆ symbol()