A plot item, that represents a series of points. More...

#include <qwt_plot_curve.h>

Inheritance diagram for QwtPlotCurve:

Classes
class	PrivateData
Public Types
enum	CurveAttribute { Inverted = 0x01, Fitted = 0x02 }
typedef QFlags< CurveAttribute >	CurveAttributes
	Curve attributes.
enum	CurveStyle { NoCurve = -1, Lines, Sticks, Steps, Dots, LinesAndDots, UserCurve = 100 }
enum	LegendAttribute { LegendNoAttribute = 0x00, LegendShowLine = 0x01, LegendShowSymbol = 0x02, LegendShowBrush = 0x04 }
typedef QFlags< LegendAttribute >	LegendAttributes
	Legend attributes.
enum	PaintAttribute { ClipPolygons = 0x01, FilterPoints = 0x02, MinimizeMemory = 0x04, ImageBuffer = 0x08, FilterPointsAggressive = 0x10 }
typedef QFlags< PaintAttribute >	PaintAttributes
	Paint attributes.
Public Member Functions
double	baseline () const
const QBrush &	brush () const
virtual int	closestPoint (const QPoint &pos, double *dist=NULL) const
QwtCurveFitter *	curveFitter () const
virtual void	drawSeries (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
virtual QwtGraphic	legendIcon (int index, const QSizeF &) const
double	maxXValue () const
	boundingRect().right()
double	maxYValue () const
	boundingRect().bottom()
double	minXValue () const
	boundingRect().left()
double	minYValue () const
	boundingRect().top()
const QPen &	pen () const
	QwtPlotCurve (const QString &title=QString())
	QwtPlotCurve (const QwtText &title)
virtual int	rtti () const
void	setBaseline (double)
	Set the value of the baseline.
void	setBrush (const QBrush &)
	Assign a brush.
void	setCurveAttribute (CurveAttribute, bool on=true)
void	setCurveFitter (QwtCurveFitter *)
void	setLegendAttribute (LegendAttribute, bool on=true)
void	setPaintAttribute (PaintAttribute, bool on=true)
void	setPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine)
void	setPen (const QPen &)
void	setRawSamples (const double xData, const double yData, int size)
	Initialize the data by pointing to memory blocks which are not managed by QwtPlotCurve.
void	setSamples (const double xData, const double yData, int size)
void	setSamples (const QVector< double > &xData, const QVector< double > &yData)
	Initialize data with x- and y-arrays (explicitly shared)
void	setSamples (const QVector< QPointF > &)
void	setSamples (QwtSeriesData< QPointF > *)
void	setStyle (CurveStyle style)
void	setSymbol (QwtSymbol *)
	Assign a symbol.
CurveStyle	style () const
const QwtSymbol *	symbol () const
bool	testCurveAttribute (CurveAttribute) const
bool	testLegendAttribute (LegendAttribute) const
bool	testPaintAttribute (PaintAttribute) const
virtual	~QwtPlotCurve ()
	Destructor.
Protected Member Functions
void	closePolyline (QPainter *, const QwtScaleMap &, const QwtScaleMap &, QPolygonF &) const
	Complete a polygon to be a closed polygon including the area between the original polygon and the baseline.
virtual void	drawCurve (QPainter *p, int style, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
	Draw the line part (without symbols) of a curve interval.
virtual void	drawDots (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
virtual void	drawLines (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
	Draw lines.
virtual void	drawSteps (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
virtual void	drawSticks (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
virtual void	drawSymbols (QPainter *p, const QwtSymbol &, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
virtual void	fillCurve (QPainter *, const QwtScaleMap &, const QwtScaleMap &, const QRectF &canvasRect, QPolygonF &) const
void	init ()
	Initialize internal members.
Private Attributes
PrivateData *	d_data

Detailed Description

A plot item, that represents a series of points.

A curve is the representation of a series of points in the x-y plane. It supports different display styles, interpolation ( f.e. spline ) and symbols.

Usage

a) Assign curve properties: When a curve is created, it is configured to draw black solid lines with in QwtPlotCurve::Lines style and no symbols. You can change this by calling setPen(), setStyle() and setSymbol().
b) Connect/Assign data.: QwtPlotCurve gets its points using a QwtSeriesData object offering a bridge to the real storage of the points ( like QAbstractItemModel ). There are several convenience classes derived from QwtSeriesData, that also store the points inside ( like QStandardItemModel ). QwtPlotCurve also offers a couple of variations of setSamples(), that build QwtSeriesData objects from arrays internally.
c) Attach the curve to a plot: See QwtPlotItem::attach()

Example:: see examples/bode

See also:: QwtPointSeriesData, QwtSymbol, QwtScaleMap

Definition at line 55 of file qwt_plot_curve.h.

Member Typedef Documentation

typedef QFlags<CurveAttribute> QwtPlotCurve::CurveAttributes

Curve attributes.

Definition at line 134 of file qwt_plot_curve.h.

typedef QFlags<LegendAttribute> QwtPlotCurve::LegendAttributes

Legend attributes.

Definition at line 170 of file qwt_plot_curve.h.

typedef QFlags<PaintAttribute> QwtPlotCurve::PaintAttributes

Paint attributes.

Definition at line 237 of file qwt_plot_curve.h.

Member Enumeration Documentation

enum QwtPlotCurve::CurveAttribute

Attribute for drawing the curve

See also:: setCurveAttribute(), testCurveAttribute(), curveFitter()

Enumerator:

Inverted

For QwtPlotCurve::Steps only. Draws a step function from the right to the left.

Fitted

Only in combination with QwtPlotCurve::Lines A QwtCurveFitter tries to interpolate/smooth the curve, before it is painted.

Note:: Curve fitting requires temporary memory for calculating coefficients and additional points. If painting in QwtPlotCurve::Fitted mode is slow it might be better to fit the points, before they are passed to QwtPlotCurve.

Definition at line 112 of file qwt_plot_curve.h.

enum QwtPlotCurve::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().
Sticks	Draw vertical or horizontal sticks ( depending on the orientation() ) from a baseline which is defined by setBaseline().
Steps	Connect the points with a step function. The step function is drawn from the left to the right or vice versa, depending on the QwtPlotCurve::Inverted attribute.
Dots	Draw dots at the locations of the data points. Note: This is different from a dotted line (see setPen()), and faster as a curve in QwtPlotCurve::NoStyle style and a symbol painting a point.
LinesAndDots
UserCurve	Styles >= QwtPlotCurve::UserCurve are reserved for derived classes of QwtPlotCurve that overload drawCurve() with additional application specific curve types.

Definition at line 63 of file qwt_plot_curve.h.

enum QwtPlotCurve::LegendAttribute

Attributes how to represent the curve on the legend

See also:: setLegendAttribute(), testLegendAttribute(), QwtPlotItem::legendData(), legendIcon()

Enumerator:

LegendNoAttribute	QwtPlotCurve tries to find a color representing the curve and paints a rectangle with it.
LegendShowLine	If the style() is not QwtPlotCurve::NoCurve a line is painted with the curve pen().
LegendShowSymbol	If the curve has a valid symbol it is painted.
LegendShowBrush	If the curve has a brush a rectangle filled with the curve brush() is painted.

Definition at line 143 of file qwt_plot_curve.h.

enum QwtPlotCurve::PaintAttribute

Attributes to modify the drawing algorithm. The default setting enables ClipPolygons | FilterPoints

See also:: setPaintAttribute(), testPaintAttribute()

Enumerator:

ClipPolygons	Clip polygons before painting them. In situations, where points are far outside the visible area (f.e when zooming deep) this might be a substantial improvement for the painting performance
FilterPoints	Tries to reduce the data that has to be painted, by sorting out duplicates, or paintings outside the visible area. Might have a notable impact on curves with many close points. Only a couple of very basic filtering algorithms are implemented.
MinimizeMemory	Minimize memory usage that is temporarily needed for the translated points, before they get painted. This might slow down the performance of painting
ImageBuffer	Render the points to a temporary image and paint the image. This is a very special optimization for Dots style, when having a huge amount of points. With a reasonable number of points QPainter::drawPoints() will be faster.
FilterPointsAggressive	More aggressive point filtering trying to filter out intermediate points, accepting minor visual differences. Has only an effect, when drawing the curve to a paint device in integer coordinates ( f.e. all widgets on screen ) using the fact, that consecutive points are often mapped to the same x or y coordinate. Each chunk of samples mapped to the same coordinate can be reduced to 4 points ( first, min, max last ). In the worst case the polygon to be rendered will be 4 times the width of the plot canvas. The algorithm is very fast and effective for huge datasets, and can be used inside a replot cycle. Note: Implemented for QwtPlotCurve::Lines only As this algo replaces many small lines by a long one a nasty bug of the raster paint engine ( Qt 4.8, Qt 5.1 - 5.3 ) becomes more dominant. For these versions the bug can be worked around by enabling the QwtPainter::polylineSplitting() mode.

Definition at line 178 of file qwt_plot_curve.h.

Constructor & Destructor Documentation

QwtPlotCurve::QwtPlotCurve ( const QString & title = QString() ) [explicit]

Constructor

Parameters:

title Title of the curve

Definition at line 129 of file qwt_plot_curve.cpp.

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

Constructor

Parameters:

title Title of the curve

Definition at line 119 of file qwt_plot_curve.cpp.

QwtPlotCurve::~QwtPlotCurve ( ) [virtual]

Destructor.

Definition at line 136 of file qwt_plot_curve.cpp.

Member Function Documentation

double QwtPlotCurve::baseline ( ) const

Returns:: Value of the baseline

See also:: setBaseline()

Definition at line 1068 of file qwt_plot_curve.cpp.

const QBrush & QwtPlotCurve::brush ( ) const

Returns:: Brush used to fill the area between lines and the baseline

See also:: setBrush(), setBaseline(), baseline()

Definition at line 346 of file qwt_plot_curve.cpp.

void QwtPlotCurve::closePolyline	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		QPolygonF &	polygon
	)		const `[protected]`

Complete a polygon to be a closed polygon including the area between the original polygon and the baseline.

Parameters:

painter	Painter
xMap	X map
yMap	Y map
polygon	Polygon to be completed

Definition at line 962 of file qwt_plot_curve.cpp.

int QwtPlotCurve::closestPoint	(	const QPoint &	pos,
		double *	dist = `NULL`
	)		const `[virtual]`

Find the closest curve point for a specific position

Parameters:

pos	Position, where to look for the closest curve point
dist	If dist != NULL, closestPoint() returns the distance between the position and the closest curve point

Returns:: Index of the closest curve point, or -1 if none can be found ( f.e when the curve has no points )

Note:: closestPoint() implements a dumb algorithm, that iterates over all points

Definition at line 1084 of file qwt_plot_curve.cpp.

QwtCurveFitter * QwtPlotCurve::curveFitter ( ) const

Get the curve fitter. If curve fitting is disabled NULL is returned.

Returns:: Curve fitter

See also:: setCurveFitter(), Fitted

Definition at line 905 of file qwt_plot_curve.cpp.

void QwtPlotCurve::drawCurve	(	QPainter *	painter,
		int	style,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const `[protected, virtual]`

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

Parameters:

painter	Painter
style	curve style, see QwtPlotCurve::CurveStyle
xMap	x map
yMap	y map
canvasRect	Contents rectangle of the canvas
from	index of the first point to be painted
to	index of the last point to be painted

See also:: draw(), drawDots(), drawLines(), drawSteps(), drawSticks()

Definition at line 412 of file qwt_plot_curve.cpp.

void QwtPlotCurve::drawDots	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const `[protected, virtual]`

Draw dots

Parameters:

painter	Painter
xMap	x map
yMap	y map
canvasRect	Contents rectangle of the canvas
from	index of the first point to be painted
to	index of the last point to be painted

See also:: draw(), drawCurve(), drawSticks(), drawLines(), drawSteps()

Definition at line 673 of file qwt_plot_curve.cpp.

void QwtPlotCurve::drawLines	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const `[protected, virtual]`

Draw lines.

If the CurveAttribute Fitted is enabled a QwtCurveFitter tries to interpolate/smooth the curve, before it is painted.

Parameters:

painter	Painter
xMap	x map
yMap	y map
canvasRect	Contents rectangle of the canvas
from	index of the first point to be painted
to	index of the last point to be painted

See also:: setCurveAttribute(), setCurveFitter(), draw(), drawLines(), drawDots(), drawSteps(), drawSticks()

Definition at line 477 of file qwt_plot_curve.cpp.

void QwtPlotCurve::drawSeries	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const `[virtual]`

Draw an interval of the curve

Parameters:

painter	Painter
xMap	Maps x-values into pixel coordinates.
yMap	Maps y-values into pixel coordinates.
canvasRect	Contents rectangle of the canvas
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(),

Implements QwtPlotSeriesItem.

Definition at line 364 of file qwt_plot_curve.cpp.

void QwtPlotCurve::drawSteps	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const `[protected, virtual]`

Draw step function

The direction of the steps depends on Inverted attribute.

Parameters:

painter	Painter
xMap	x map
yMap	y map
canvasRect	Contents rectangle of the canvas
from	index of the first point to be painted
to	index of the last point to be painted

See also:: CurveAttribute, setCurveAttribute(), draw(), drawCurve(), drawDots(), drawLines(), drawSticks()

Definition at line 774 of file qwt_plot_curve.cpp.

void QwtPlotCurve::drawSticks	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const `[protected, virtual]`

Draw sticks

Parameters:

painter	Painter
xMap	x map
yMap	y map
canvasRect	Contents rectangle of the canvas
from	index of the first point to be painted
to	index of the last point to be painted

See also:: draw(), drawCurve(), drawDots(), drawLines(), drawSteps()

Definition at line 620 of file qwt_plot_curve.cpp.

void QwtPlotCurve::drawSymbols	(	QPainter *	painter,
		const QwtSymbol &	symbol,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const `[protected, virtual]`

Draw symbols

Parameters:

painter	Painter
symbol	Curve symbol
xMap	x map
yMap	y map
canvasRect	Contents rectangle of the canvas
from	Index of the first point to be painted
to	Index of the last point to be painted

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

Definition at line 1012 of file qwt_plot_curve.cpp.

void QwtPlotCurve::fillCurve	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		QPolygonF &	polygon
	)		const `[protected, virtual]`

Fill the area between the curve and the baseline with the curve brush

Parameters:

painter	Painter
xMap	x map
yMap	y map
canvasRect	Contents rectangle of the canvas
polygon	Polygon - will be modified !

See also:: setBrush(), setBaseline(), setStyle()

Definition at line 922 of file qwt_plot_curve.cpp.

void QwtPlotCurve::init ( ) [protected]

Initialize internal members.

Definition at line 142 of file qwt_plot_curve.cpp.

QwtGraphic QwtPlotCurve::legendIcon	(	int	index,
		const QSizeF &	size
	)		const `[virtual]`

Returns:: Icon representing the curve on the legend

Parameters:

index	Index of the legend entry ( ignored as there is only one )
size	Icon size

See also:: QwtPlotItem::setLegendIconSize(), QwtPlotItem::legendData()

Reimplemented from QwtPlotItem.

Definition at line 1128 of file qwt_plot_curve.cpp.

double QwtPlotCurve::maxXValue ( ) const [inline]

boundingRect().right()

Definition at line 342 of file qwt_plot_curve.h.

double QwtPlotCurve::maxYValue ( ) const [inline]

boundingRect().bottom()

Definition at line 354 of file qwt_plot_curve.h.

double QwtPlotCurve::minXValue ( ) const [inline]

boundingRect().left()

Definition at line 336 of file qwt_plot_curve.h.

double QwtPlotCurve::minYValue ( ) const [inline]

boundingRect().top()

Definition at line 348 of file qwt_plot_curve.h.

const QPen & QwtPlotCurve::pen ( ) const

Returns:: Pen used to draw the lines

See also:: setPen(), brush()

Definition at line 311 of file qwt_plot_curve.cpp.

int QwtPlotCurve::rtti ( ) const [virtual]

Returns:: QwtPlotItem::Rtti_PlotCurve

Reimplemented from QwtPlotItem.

Definition at line 154 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setBaseline ( double value )

Set the value of the baseline.

The baseline is needed for filling the curve with a brush or the Sticks drawing style.

The interpretation of the baseline depends on the orientation(). With Qt::Horizontal, the baseline is interpreted as a horizontal line at y = baseline(), with Qt::Vertical, it is interpreted as a vertical line at x = baseline().

The default value is 0.0.

Parameters:

value Value of the baseline

See also:: baseline(), setBrush(), setStyle(), QwtPlotAbstractSeriesItem::orientation()

Definition at line 1055 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setBrush ( const QBrush & brush )

Assign a brush.

In case of brush.style() != QBrush::NoBrush and style() != QwtPlotCurve::Sticks the area between the curve and the baseline will be filled.

In case !brush.color().isValid() the area will be filled by pen.color(). The fill algorithm simply connects the first and the last curve point to the baseline. So the curve data has to be sorted (ascending or descending).

Parameters:

brush New brush

See also:: brush(), setBaseline(), baseline()

Definition at line 331 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setCurveAttribute	(	CurveAttribute	attribute,
		bool	on = `true`
	)

Specify an attribute for drawing the curve

Parameters:

attribute	Curve attribute
on	On/Off

/sa testCurveAttribute(), setCurveFitter()

Definition at line 852 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setCurveFitter ( QwtCurveFitter * curveFitter )

Assign a curve fitter

The curve fitter "smooths" the curve points, when the Fitted CurveAttribute is set. setCurveFitter(NULL) also disables curve fitting.

The curve fitter operates on the translated points ( = widget coordinates) to be functional for logarithmic scales. Obviously this is less performant for fitting algorithms, that reduce the number of points.

For situations, where curve fitting is used to improve the performance of painting huge series of points it might be better to execute the fitter on the curve points once and to cache the result in the QwtSeriesData object.

Parameters:

curveFitter() Curve fitter

See also:: Fitted

Definition at line 891 of file qwt_plot_curve.cpp.

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

Specify an attribute how to draw the legend icon

Parameters:

attribute	Attribute
on	On/Off /sa testLegendAttribute(). legendIcon()

Definition at line 190 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setPaintAttribute	(	PaintAttribute	attribute,
		bool	on = `true`
	)

Specify an attribute how to draw the curve

Parameters:

attribute	Paint attribute
on	On/Off

See also:: testPaintAttribute()

Definition at line 166 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setPen	(	const QColor &	color,
		qreal	width = `0.0`,
		Qt::PenStyle	style = `Qt::SolidLine`
	)

Build and assign a pen

In Qt5 the default pen width is 1.0 ( 0.0 in Qt4 ) what makes it non cosmetic ( see QPen::isCosmetic() ). This method has been introduced to hide this incompatibility.

Parameters:

color	Pen color
width	Pen width
style	Pen style

See also:: pen(), brush()

Definition at line 285 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setPen ( const QPen & pen )

Assign a pen

Parameters:

pen New pen

See also:: pen(), brush()

Definition at line 296 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setRawSamples	(	const double *	xData,
		const double *	yData,
		int	size
	)

Initialize the data by pointing to memory blocks which are not managed by QwtPlotCurve.

setRawSamples is provided for efficiency. It is important to keep the pointers during the lifetime of the underlying QwtCPointerData class.

Parameters:

xData	pointer to x data
yData	pointer to y data
size	size of x and y

See also:: QwtCPointerData

Definition at line 1239 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setSamples	(	const double *	xData,
		const double *	yData,
		int	size
	)

Set data by copying x- and y-values from specified memory blocks. Contrary to setRawSamples(), this function makes a 'deep copy' of the data.

Parameters:

xData	pointer to x values
yData	pointer to y values
size	size of xData and yData

See also:: QwtPointArrayData

Definition at line 1256 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setSamples	(	const QVector< double > &	xData,
		const QVector< double > &	yData
	)

Initialize data with x- and y-arrays (explicitly shared)

Parameters:

xData	x data
yData	y data

See also:: QwtPointArrayData

Definition at line 1270 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setSamples ( const QVector< QPointF > & samples )

Initialize data with an array of points.

Parameters:

samples Vector of points

Note:: QVector is implicitly shared; QPolygonF is derived from QVector<QPointF>

Definition at line 1203 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setSamples ( QwtSeriesData< QPointF > * data )

Assign a series of points

setSamples() is just a wrapper for setData() without any additional value - beside that it is easier to find for the developer.

Parameters:

data Data

Warning:: The item takes ownership of the data object, deleting it when its not used anymore.

Definition at line 1218 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setStyle ( CurveStyle style )

Set the curve's drawing style

Parameters:

style Curve style

See also:: style()

Definition at line 219 of file qwt_plot_curve.cpp.

void QwtPlotCurve::setSymbol ( QwtSymbol * symbol )

Assign a symbol.

The curve will take the ownership of the symbol, hence the previously set symbol will be delete by setting a new one. If symbol is NULL no symbol will be drawn.

Parameters:

symbol Symbol

See also:: symbol()

Definition at line 249 of file qwt_plot_curve.cpp.

QwtPlotCurve::CurveStyle QwtPlotCurve::style ( ) const

Returns:: Style of the curve

See also:: setStyle()

Definition at line 234 of file qwt_plot_curve.cpp.

const QwtSymbol * QwtPlotCurve::symbol ( ) const

Returns:: Current symbol or NULL, when no symbol has been assigned

See also:: setSymbol()

Definition at line 267 of file qwt_plot_curve.cpp.

bool QwtPlotCurve::testCurveAttribute ( CurveAttribute attribute ) const

Returns:: true, if attribute is enabled

See also:: setCurveAttribute()

Definition at line 869 of file qwt_plot_curve.cpp.

bool QwtPlotCurve::testLegendAttribute ( LegendAttribute attribute ) const

Returns:: True, when attribute is enabled

See also:: setLegendAttribute()

Definition at line 208 of file qwt_plot_curve.cpp.

bool QwtPlotCurve::testPaintAttribute ( PaintAttribute attribute ) const

Returns:: True, when attribute is enabled

See also:: setPaintAttribute()

Definition at line 178 of file qwt_plot_curve.cpp.

Member Data Documentation

PrivateData* QwtPlotCurve::d_data [private]

Reimplemented from QwtPlotSeriesItem.

Definition at line 331 of file qwt_plot_curve.h.

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

Classes

Public Types

Public Member Functions

Protected Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation