QwtPolarMarker Class Reference

A class for drawing markers. More...

#include <qwt_polar_marker.h>

Inheritance diagram for QwtPolarMarker:

[legend]

List of all members.

Public Member Functions
	QwtPolarMarker ()
virtual	~QwtPolarMarker ()
virtual int	rtti () const
void	setPosition (const QwtPolarPoint &)
QwtPolarPoint	position () const
void	setSymbol (const QwtSymbol &s)
const QwtSymbol &	symbol () const
void	setLabel (const QwtText &)
QwtText	label () const
void	setLabelAlignment (Qt::Alignment)
Qt::Alignment	labelAlignment () const
virtual void	draw (QPainter *painter, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QwtDoublePoint &pole, double radius, const QwtDoubleRect &canvasRect) const
virtual QwtDoubleInterval	boundingInterval (int scaleId) const

---

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

(

)

[explicit]

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

QwtPolarMarker::~QwtPolarMarker

(

)

[virtual]

Destructor.

---

Member Function Documentation

int QwtPolarMarker::rtti

(

)

const [virtual]

Returns:

QwtPolarItem::Rtti_PlotMarker

Reimplemented from QwtPolarItem.

void QwtPolarMarker::setPosition

(

const QwtPolarPoint &

pos

)

Change the position of the marker.

QwtPolarPoint QwtPolarMarker::position

(

)

const

Returns:

Position of the marker

void QwtPolarMarker::setSymbol

(

const QwtSymbol &

s

)

Assign a symbol.

Parameters:

s

New symbol

See also:

symbol()

const QwtSymbol & QwtPolarMarker::symbol

(

)

const

Returns:

the symbol

See also:

setSymbol(), QwtSymbol

void QwtPolarMarker::setLabel

(

const QwtText &

label

)

Set the label.

Parameters:

label

label text

See also:

label()

QwtText QwtPolarMarker::label

(

)

const

Returns:

the label

See also:

setLabel()

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()

Qt::Alignment QwtPolarMarker::labelAlignment

(

)

const

Returns:

the label alignment

See also:

setLabelAlignment()

void QwtPolarMarker::draw	(	QPainter *	painter,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QwtDoublePoint &	pole,
		double	radius,
		const QwtDoubleRect &	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.

QwtDoubleInterval 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.