#include <qwt_polar_curve.h>

Inheritance diagram for QwtPolarCurve:

Public Types
enum	CurveStyle { NoCurve, Lines, UserCurve = 100 }
enum	LegendAttribute { LegendShowLine = 0x01, LegendShowSymbol = 0x02 }
typedef QFlags< LegendAttribute >	LegendAttributes
Public Member Functions
	QwtPolarCurve ()
	QwtPolarCurve (const QwtText &title)
	QwtPolarCurve (const QString &title)
virtual	~QwtPolarCurve ()
virtual int	rtti () const
void	setLegendAttribute (LegendAttribute, bool on=true)
bool	testLegendAttribute (LegendAttribute) const
void	setData (QwtSeriesData< QwtPointPolar > *data)
const QwtSeriesData < QwtPointPolar > *	data () const
size_t	dataSize () const
QwtPointPolar	sample (int i) const
void	setPen (const QPen &)
const QPen &	pen () const
void	setStyle (CurveStyle style)
CurveStyle	style () const
void	setSymbol (const QwtSymbol *)
const QwtSymbol *	symbol () const
void	setCurveFitter (QwtCurveFitter *)
QwtCurveFitter *	curveFitter () const
virtual void	draw (QPainter *p, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, double radius, const QRectF &canvasRect) const
virtual void	draw (QPainter *p, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, int from, int to) const
virtual void	updateLegend (QwtLegend *) const
virtual QwtInterval	boundingInterval (int scaleId) const
virtual void	drawLegendIdentifier (QPainter *, const QRectF &) const
Protected Member Functions
void	init ()
virtual void	drawCurve (QPainter *, int style, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, int from, int to) const
virtual void	drawSymbols (QPainter *, const QwtSymbol &, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, int from, int to) const
void	drawLines (QPainter *, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, int from, int to) const

Detailed Description

An item, that represents a series of points.

A curve is the representation of a series of points in polar coordinates. The points are connected to the curve using the abstract QwtData interface.

See also:: QwtPolarPlot, QwtSymbol, QwtScaleMap

Member Typedef Documentation

typedef QFlags<LegendAttribute> QwtPolarCurve::LegendAttributes

Legend attributes.

Member Enumeration Documentation

enum QwtPolarCurve::CurveStyle

Curve styles.

See also:: setStyle(), style()

Enumerator:

NoCurve	Don't draw a curve. Note: This doesn't affect the symbols.
Lines	Connect the points with straight lines. The lines might be interpolated depending on the 'Fitted' attribute. Curve fitting can be configured using setCurveFitter().
UserCurve	Values > 100 are reserved for user specific curve styles.

enum QwtPolarCurve::LegendAttribute

Attributes how to represent the curve on the legend.

If none of the flags is activated QwtPlotCurve tries to find a color representing the curve and paints a rectangle with it. In the default setting all attributes are off.

See also:: setLegendAttribute(), testLegendAttribute(), drawLegendIdentifier()

Enumerator:

LegendShowLine	If the curveStyle() is not NoCurve a line is painted with the curvePen().
LegendShowSymbol	If the curve has a valid symbol it is painted.

Constructor & Destructor Documentation

QwtPolarCurve::QwtPolarCurve ( ) [explicit]

Constructor.

QwtPolarCurve::QwtPolarCurve ( const QwtText & title ) [explicit]

Constructor

Parameters:

title title of the curve

QwtPolarCurve::QwtPolarCurve ( const QString & title ) [explicit]

Constructor

Parameters:

title title of the curve

QwtPolarCurve::~QwtPolarCurve ( ) [virtual]

Destructor.

Member Function Documentation

QwtInterval QwtPolarCurve::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

See also:: QwtData::boundingRect()

Reimplemented from QwtPolarItem.

QwtCurveFitter * QwtPolarCurve::curveFitter ( ) const

Returns:: The curve fitter

See also:: setCurveFitter()

const QwtSeriesData< QwtPointPolar > * QwtPolarCurve::data ( ) const [inline]

Returns:: the the curve data

size_t QwtPolarCurve::dataSize ( ) const

Returns:: Number of points

See also:: setData()

void QwtPolarCurve::draw	(	QPainter *	painter,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QPointF &	pole,
		double	radius,
		const QRectF &	canvasRect
	)		const `[virtual]`

Draw the curve

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.

void QwtPolarCurve::draw	(	QPainter *	painter,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QPointF &	pole,
		int	from,
		int	to
	)		const `[virtual]`

Draw an interval of the curve.

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
from	index of the first point to be painted
to	index of the last point to be painted. If to < 0 the curve will be painted to its last point.

See also:: drawCurve(), drawSymbols(),

void QwtPolarCurve::drawCurve	(	QPainter *	painter,
		int	style,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QPointF &	pole,
		int	from,
		int	to
	)		const `[protected, virtual]`

Draw the line part (without symbols) of a curve interval.

Parameters:

painter	Painter
style	Curve style, see QwtPolarCurve::CurveStyle
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
from	index of the first point to be painted
to	index of the last point to be painted.

See also:: draw(), drawLines()

void QwtPolarCurve::drawLegendIdentifier	(	QPainter *	painter,
		const QRectF &	rect
	)		const `[virtual]`

Draw the identifier representing the curve on the legend.

Parameters:

painter	Qt Painter
rect	Bounding rectangle for the identifier

See also:: setLegendAttribute

void QwtPolarCurve::drawLines	(	QPainter *	painter,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QPointF &	pole,
		int	from,
		int	to
	)		const `[protected]`

Draw lines

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
from	index of the first point to be painted
to	index of the last point to be painted.

See also:: draw(), drawLines(), setCurveFitter()

void QwtPolarCurve::drawSymbols	(	QPainter *	painter,
		const QwtSymbol &	symbol,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QPointF &	pole,
		int	from,
		int	to
	)		const `[protected, virtual]`

Draw symbols

Parameters:

painter	Painter
symbol	Curve symbol
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
from	index of the first point to be painted
to	index of the last point to be painted.

See also:: setSymbol(), draw(), drawCurve()

void QwtPolarCurve::init ( ) [protected]

Initialize data members.

const QPen & QwtPolarCurve::pen ( ) const

Returns:: Pen used to draw the lines

See also:: setPen()

int QwtPolarCurve::rtti ( ) const [virtual]

Returns:: QwtPolarCurve::Rtti_PolarCurve

Reimplemented from QwtPolarItem.

QwtPointPolar QwtPolarCurve::sample ( int i ) const [inline]

Parameters:

i index

Returns:: point at position i

void QwtPolarCurve::setCurveFitter ( QwtCurveFitter * curveFitter )

Insert a curve fitter.

Parameters:

curveFitter Curve fitter

A curve fitter interpolates the curve points. F.e QwtPolarFitter adds equidistant points so that the connection gets rounded instead of having straight lines. If curveFitter is NULL fitting is disabled.

See also:: curveFitter()

void QwtPolarCurve::setData ( QwtSeriesData< QwtPointPolar > * data )

Initialize data with a pointer to QwtSeriesData<QwtPointPolar>.

The x-values of the data object represent the azimuth, the y-value respresent the radius.

Parameters:

data Data

void QwtPolarCurve::setLegendAttribute	(	LegendAttribute	attribute,
		bool	on = `true`
	)

Specify an attribute how to draw the legend identifier

Parameters:

attribute	Attribute
on	On/Off /sa LegendAttribute, testLegendAttribute()

void QwtPolarCurve::setPen ( const QPen & pen )

Assign a pen.

Parameters:

pen New pen

See also:: pen()

void QwtPolarCurve::setStyle ( CurveStyle style )

Set the curve's drawing style

Parameters:

style Curve style

See also:: CurveStyle, style()

void QwtPolarCurve::setSymbol ( const QwtSymbol * symbol )

Assign a symbol.

Parameters:

symbol Symbol

See also:: symbol()

QwtPolarCurve::CurveStyle QwtPolarCurve::style ( ) const

Returns:: Current style

See also:: CurveStyle, setStyle()

const QwtSymbol * QwtPolarCurve::symbol ( ) const

Returns:: The current symbol

See also:: setSymbol()

bool QwtPolarCurve::testLegendAttribute ( LegendAttribute attribute ) const

Test if a lefend attribute is enables.

Parameters:

attribute Legend attribute

Returns:: True if attribute is enabled

See also:: LegendAttribute, setLegendAttribute()

void QwtPolarCurve::updateLegend ( QwtLegend * legend ) const [virtual]

Update the widget that represents the curve on the legend.

Reimplemented from QwtPolarItem.

Public Types

Public Member Functions

Protected Member Functions

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation