#include <qwt_plot_curve.h>

Inherits QwtPlotSeriesItem< QPointF >.

Public Types
enum	CurveAttribute { Inverted = 0x01, Fitted = 0x02 }
typedef QFlags< CurveAttribute >	CurveAttributes
enum	CurveStyle { NoCurve = -1, Lines, Sticks, Steps, Dots, UserCurve = 100 }
enum	ItemAttribute { Legend = 0x01, AutoScale = 0x02 }
typedef QFlags< ItemAttribute >	ItemAttributes
enum	LegendAttribute { LegendNoAttribute = 0x00, LegendShowLine = 0x01, LegendShowSymbol = 0x02, LegendShowBrush = 0x04 }
typedef QFlags< LegendAttribute >	LegendAttributes
enum	PaintAttribute { ClipPolygons = 0x01, CacheSymbols = 0x02 }
typedef QFlags< PaintAttribute >	PaintAttributes
enum	RenderHint { RenderAntialiased = 1 }
typedef QFlags< RenderHint >	RenderHints
enum	RttiValues { Rtti_PlotItem = 0, Rtti_PlotGrid, Rtti_PlotScale, Rtti_PlotMarker, Rtti_PlotCurve, Rtti_PlotSpectroCurve, Rtti_PlotIntervalCurve, Rtti_PlotHistogram, Rtti_PlotSpectrogram, Rtti_PlotSVG, Rtti_PlotUserItem = 1000 }
Public Member Functions
void	attach (QwtPlot *plot)
double	baseline () const
virtual QRectF	boundingRect () const
const QBrush &	brush () const
int	closestPoint (const QPoint &pos, double *dist=NULL) const
QwtCurveFitter *	curveFitter () const
QwtSeriesData< QPointF > *	data ()
const QwtSeriesData< QPointF > *	data () const
size_t	dataSize () const
void	detach ()
virtual void	draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &) const
virtual void	drawLegendIdentifier (QPainter *, const QRectF &) const
virtual void	drawSeries (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
void	hide ()
bool	isVisible () const
virtual void	itemChanged ()
virtual QWidget *	legendItem () const
double	maxXValue () const
double	maxYValue () const
double	minXValue () const
double	minYValue () const
Qt::Orientation	orientation () const
QRectF	paintRect (const QwtScaleMap &, const QwtScaleMap &) const
const QPen &	pen () const
QwtPlot *	plot () const
	QwtPlotCurve (const QString &title=QString::null)
	QwtPlotCurve (const QwtText &title)
virtual int	rtti () const
QPointF	sample (int index) const
QRectF	scaleRect (const QwtScaleMap &, const QwtScaleMap &) const
void	setAxes (int xAxis, int yAxis)
void	setBaseline (double ref)
void	setBrush (const QBrush &)
void	setCurveAttribute (CurveAttribute, bool on=true)
void	setCurveFitter (QwtCurveFitter *)
void	setData (QwtSeriesData< QPointF > *)
void	setItemAttribute (ItemAttribute, bool on=true)
void	setLegendAttribute (LegendAttribute, bool on=true)
void	setOrientation (Qt::Orientation)
void	setPaintAttribute (PaintAttribute, bool on=true)
void	setPen (const QPen &)
void	setRawSamples (const double xData, const double yData, int size)
void	setRenderHint (RenderHint, bool on=true)
void	setSamples (const double xData, const double yData, int size)
void	setSamples (const QVector< double > &xData, const QVector< double > &yData)
void	setSamples (const QVector< QPointF > &)
void	setStyle (CurveStyle style)
void	setSymbol (const QwtSymbol *s)
void	setTitle (const QString &title)
void	setTitle (const QwtText &title)
virtual void	setVisible (bool)
void	setXAxis (int axis)
void	setYAxis (int axis)
void	setZ (double z)
void	show ()
CurveStyle	style () const
const QwtSymbol *	symbol () const
bool	testCurveAttribute (CurveAttribute) const
bool	testItemAttribute (ItemAttribute) const
bool	testLegendAttribute (LegendAttribute) const
bool	testPaintAttribute (PaintAttribute) const
bool	testRenderHint (RenderHint) const
const QwtText &	title () const
virtual void	updateLegend (QwtLegend *) const
virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)
int	xAxis () const
int	yAxis () const
double	z () const
virtual	~QwtPlotCurve ()
Protected Member Functions
void	closePolyline (QPainter *, const QwtScaleMap &, const QwtScaleMap &, QPolygonF &) const
virtual void	drawCurve (QPainter *p, int style, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
void	drawDots (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
void	drawLines (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
void	drawSteps (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
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 ()
Protected Attributes
QwtSeriesData< QPointF > *	d_series

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

Member Typedef Documentation

typedef QFlags<CurveAttribute> QwtPlotCurve::CurveAttributes

Curve attributes.

typedef QFlags<ItemAttribute> QwtPlotItem::ItemAttributes [inherited]

Plot Item Attributes.

typedef QFlags<LegendAttribute> QwtPlotCurve::LegendAttributes

Legend attributes.

typedef QFlags<PaintAttribute> QwtPlotCurve::PaintAttributes

Paint attributes.

typedef QFlags<RenderHint> QwtPlotItem::RenderHints [inherited]

Render hints.

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 temorary 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.

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.
UserCurve	Styles >= QwtPlotCurve::UserCurve are reserved for derived classes of QwtPlotCurve that overload drawCurve() with additional application specific curve types.

enum QwtPlotItem::ItemAttribute [inherited]

Plot Item Attributes

See also:: setItemAttribute(), testItemAttribute()

Enumerator:

Legend	The item is represented on the legend.
AutoScale	The boundingRect() of the item is included in the autoscaling calculation.

enum QwtPlotCurve::LegendAttribute

Attributes how to represent the curve on the legend

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

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.

enum QwtPlotCurve::PaintAttribute

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

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
CacheSymbols	Paint the symbol to a QPixmap and paint the pixmap instead rendering the symbol for each point. The flag has no effect, when the curve is not painted to the canvas ( f.e when exporting the plot to a PDF document ).

enum QwtPlotItem::RenderHint [inherited]

Render hints.

Enumerator:

RenderAntialiased

Enable antialiasing.

enum QwtPlotItem::RttiValues [inherited]

Runtime type information.

RttiValues is used to cast plot items, without having to enable runtime type information of the compiler.

Enumerator:

Rtti_PlotItem	Unspecific value, that can be used, when it doesn't matter.
Rtti_PlotGrid	For QwtPlotGrid.
Rtti_PlotScale	For QwtPlotScaleItem.
Rtti_PlotMarker	For QwtPlotMarker.
Rtti_PlotCurve	For QwtPlotCurve.
Rtti_PlotSpectroCurve	For QwtPlotSpectroCurve.
Rtti_PlotIntervalCurve	For QwtPlotIntervalCurve.
Rtti_PlotHistogram	For QwtPlotHistogram.
Rtti_PlotSpectrogram	For QwtPlotSpectrogram.
Rtti_PlotSVG	For QwtPlotSvgItem.
Rtti_PlotUserItem	Values >= Rtti_PlotUserItem are reserved for plot items not implemented in the Qwt library.

Constructor & Destructor Documentation

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

Constructor

Parameters:

title Title of the curve

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

Constructor

Parameters:

title Title of the curve

QwtPlotCurve::~QwtPlotCurve ( ) [virtual]

Destructor.

Member Function Documentation

void QwtPlotItem::attach ( QwtPlot * plot ) [inherited]

Attach the item to a plot.

This method will attach a QwtPlotItem to the QwtPlot argument. It will first detach the QwtPlotItem from any plot from a previous call to attach (if necessary). If a NULL argument is passed, it will detach from any QwtPlot it was attached to.

Parameters:

plot	Plot widget

See also:: detach()

double QwtPlotCurve::baseline ( ) const

Returns:: Value of the baseline

See also:: setBaseline()

virtual QRectF QwtPlotSeriesItem< QPointF >::boundingRect ( ) const [virtual, inherited]

Returns:: Bounding rectangle of the data. If there is no bounding rect, like for empty data the rectangle is invalid.

See also:: QwtSeriesData<T>::boundingRect(), QRectF::isValid()

Reimplemented from QwtPlotItem.

const QBrush & QwtPlotCurve::brush ( ) const

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

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

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

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

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 clostest 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

QwtCurveFitter * QwtPlotCurve::curveFitter ( ) const

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

Returns:: Curve fitter

See also:: setCurveFitter(), Fitted

void QwtPlotItem::detach ( ) [inherited]

This method detaches a QwtPlotItem from any QwtPlot it has been associated with.

detach() is equivalent to calling attach( NULL )

See also:: attach()

void QwtPlotAbstractSeriesItem::draw	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect
	)		const `[virtual, inherited]`

Draw the complete series.

Parameters:

painter	Painter
xMap	Maps x-values into pixel coordinates.
yMap	Maps y-values into pixel coordinates.
canvasRect	Contents rect of the canvas

Implements QwtPlotItem.

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 rect 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()

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

Draw dots

Parameters:

painter	Painter
xMap	x map
yMap	y map
canvasRect	Contents rect 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()

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

Draw the identifier representing the curve on the legend.

Parameters:

painter	Painter
rect	Bounding rectangle for the identifier

See also:: setLegendAttribute(), QwtPlotItem::Legend

Reimplemented from QwtLegendItemManager.

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

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 rect 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()

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 rect 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 QwtPlotAbstractSeriesItem.

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

Draw step function

The direction of the steps depends on Inverted attribute.

Parameters:

painter	Painter
xMap	x map
yMap	y map
canvasRect	Contents rect 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()

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

Draw sticks

Parameters:

painter	Painter
xMap	x map
yMap	y map
canvasRect	Contents rect 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()

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 rect 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()

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 rect of the canvas
polygon	Polygon - will be modified !

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

void QwtPlotItem::hide ( ) [inherited]

Hide the item.

void QwtPlotCurve::init ( ) [protected]

Initialize internal members.

bool QwtPlotItem::isVisible ( ) const [inherited]

Returns:: true if visible

See also:: setVisible(), show(), hide()

void QwtPlotItem::itemChanged ( ) [virtual, inherited]

Update the legend and call QwtPlot::autoRefresh for the parent plot.

See also:: updateLegend()

QWidget * QwtPlotItem::legendItem ( ) const [virtual, inherited]

Allocate the widget that represents the item on the legend.

The default implementation returns a QwtLegendItem(), but an item could be represented by any type of widget, by overloading legendItem() and updateLegend().

Returns:: QwtLegendItem()

See also:: updateLegend() QwtLegend()

Implements QwtLegendItemManager.

double QwtPlotCurve::maxXValue ( ) const [inline]

boundingRect().right()

double QwtPlotCurve::maxYValue ( ) const [inline]

boundingRect().bottom()

double QwtPlotCurve::minXValue ( ) const [inline]

boundingRect().left()

double QwtPlotCurve::minYValue ( ) const [inline]

boundingRect().top()

Qt::Orientation QwtPlotAbstractSeriesItem::orientation ( ) const [inherited]

Returns:: Orientation of the plot item

See also:: setOrientation()

QRectF QwtPlotItem::paintRect	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap
	)		const `[inherited]`

Calculate the bounding paint rect of 2 maps.

Parameters:

xMap	X map
yMap	X map

Returns:: Bounding paint rect of the scale maps, normalized

const QPen & QwtPlotCurve::pen ( ) const

Returns:: Pen used to draw the lines

See also:: setPen(), brush()

QwtPlot * QwtPlotItem::plot ( ) const [inherited]

Return attached plot.

int QwtPlotCurve::rtti ( ) const [virtual]

Returns:: QwtPlotItem::Rtti_PlotCurve

Reimplemented from QwtPlotItem.

QRectF QwtPlotItem::scaleRect	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap
	)		const `[inherited]`

Calculate the bounding scale rect of 2 maps.

Parameters:

xMap	X map
yMap	X map

Returns:: Bounding scale rect of the scale maps, normalized

void QwtPlotItem::setAxes	(	int	xAxis,
		int	yAxis
	)		`[inherited]`

Set X and Y axis

The item will painted according to the coordinates its Axes.

Parameters:

xAxis	X Axis
yAxis	Y Axis

See also:: setXAxis(), setYAxis(), xAxis(), yAxis()

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 CurveType. With QwtPlotCurve::Yfx, the baseline is interpreted as a horizontal line at y = baseline(), with QwtPlotCurve::Yfy, 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(), setStyle()

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()

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()

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

void QwtPlotItem::setItemAttribute	(	ItemAttribute	attribute,
		bool	on = `true`
	)		`[inherited]`

Toggle an item attribute

Parameters:

attribute	Attribute type
on	true/false

See also:: testItemAttribute(), ItemAttribute

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

Specify an attribute how to draw the legend identifier

Parameters:

attribute	Attribute
on	On/Off /sa testLegendAttribute()

void QwtPlotAbstractSeriesItem::setOrientation ( Qt::Orientation orientation ) [inherited]

Set the orientation of the item.

The orientation() might be used in specific way by a plot item. F.e. a QwtPlotCurve uses it to identify how to display the curve int QwtPlotCurve::Steps or QwtPlotCurve::Sticks style.

See also:: orientation()

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()

void QwtPlotCurve::setPen ( const QPen & pen )

Assign a pen

Parameters:

pen New pen

See also:: pen(), brush()

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

void QwtPlotItem::setRenderHint	(	RenderHint	hint,
		bool	on = `true`
	)		`[inherited]`

Toggle an render hint

Parameters:

hint	Render hint
on	true/false

See also:: testRenderHint(), RenderHint

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

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

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

Initialize data with an array of points (explicitly shared).

Parameters:

samples Vector of points

void QwtPlotCurve::setStyle ( CurveStyle style )

Set the curve's drawing style

Parameters:

style Curve style

See also:: style()

void QwtPlotCurve::setSymbol ( const QwtSymbol * symbol )

Assign a symbol

Parameters:

symbol Symbol

See also:: symbol()

void QwtPlotItem::setTitle ( const QString & title ) [inherited]

Set a new title

Parameters:

title Title

See also:: title()

void QwtPlotItem::setTitle ( const QwtText & title ) [inherited]

Set a new title

Parameters:

title Title

See also:: title()

void QwtPlotItem::setVisible ( bool on ) [virtual, inherited]

Show/Hide the item

Parameters:

on	Show if true, otherwise hide

See also:: isVisible(), show(), hide()

void QwtPlotItem::setXAxis ( int axis ) [inherited]

Set the X axis

The item will painted according to the coordinates its Axes.

Parameters:

axis X Axis

See also:: setAxes(), setYAxis(), xAxis()

void QwtPlotItem::setYAxis ( int axis ) [inherited]

Set the Y axis

The item will painted according to the coordinates its Axes.

Parameters:

axis Y Axis

See also:: setAxes(), setXAxis(), yAxis()

void QwtPlotItem::setZ ( double z ) [inherited]

Set the z value.

Plot items are painted in increasing z-order.

Parameters:

z Z-value

See also:: z(), QwtPlotDict::itemList()

void QwtPlotItem::show ( ) [inherited]

Show the item.

QwtPlotCurve::CurveStyle QwtPlotCurve::style ( ) const

Return the current style

See also:: setStyle()

const QwtSymbol * QwtPlotCurve::symbol ( ) const

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

See also:: setSymbol()

bool QwtPlotCurve::testCurveAttribute ( CurveAttribute attribute ) const

Returns:: true, if attribute is enabled

See also:: setCurveAttribute()

bool QwtPlotItem::testItemAttribute ( ItemAttribute attribute ) const [inherited]

Test an item attribute

Parameters:

attribute Attribute type

Returns:: true/false

See also:: setItemAttribute(), ItemAttribute

bool QwtPlotCurve::testLegendAttribute ( LegendAttribute attribute ) const

Return the current paint attributes.

See also:: setLegendAttribute()

bool QwtPlotCurve::testPaintAttribute ( PaintAttribute attribute ) const

Return the current paint attributes.

See also:: setPaintAttribute()

bool QwtPlotItem::testRenderHint ( RenderHint hint ) const [inherited]

Test a render hint

Parameters:

hint	Render hint

Returns:: true/false

See also:: setRenderHint(), RenderHint

const QwtText & QwtPlotItem::title ( ) const [inherited]

Returns:: Title of the item

See also:: setTitle()

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

Update the widget that represents the item on the legend.

Parameters:

legend Legend

See also:: drawLegendIdentifier(), legendItem(), QwtPlotItem::Legend

Reimplemented from QwtPlotItem.

virtual void QwtPlotSeriesItem< QPointF >::updateScaleDiv	(	const QwtScaleDiv &	xScaleDiv,
		const QwtScaleDiv &	yScaleDiv
	)		`[virtual, inherited]`

Update the rect of interest according to the current scale ranges

Parameters:

xScaleDiv	Scale division of the x-axis
yScaleDiv	Scale division of the y-axis

See also:: QwtSeriesData<T>::setRectOfInterest()

Reimplemented from QwtPlotItem.

int QwtPlotItem::xAxis ( ) const [inherited]

Return xAxis.

int QwtPlotItem::yAxis ( ) const [inherited]

Return yAxis.

double QwtPlotItem::z ( ) const [inherited]

Plot items are painted in increasing z-order.

Returns:: setZ(), QwtPlotDict::itemList()

Member Data Documentation

QwtSeriesData<QPointF >* QwtPlotSeriesItem< QPointF >::d_series [protected, inherited]

Series.

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation