QwtPlotIntervalCurve represents a series of samples, where each value is associated with an interval ( $[y1,y2] = f(x)$ ). More...

#include <qwt_plot_intervalcurve.h>

Inheritance diagram for QwtPlotIntervalCurve:

[legend]

Classes
class	PrivateData

Public Types
enum	CurveStyle { NoCurve, Tube, UserCurve = 100 }
	Curve styles. The default setting is QwtPlotIntervalCurve::Tube. More...

enum	PaintAttribute { ClipPolygons = 0x01, ClipSymbol = 0x02 }

Public Types inherited from QwtPlotItem
enum	ItemAttribute { Legend = 0x01, AutoScale = 0x02, Margins = 0x04 }
	Plot Item Attributes. More...

enum	ItemInterest { ScaleInterest = 0x01, LegendInterest = 0x02 }
	Plot Item Interests. More...

enum	RenderHint { RenderAntialiased = 0x1 }
	Render hints. More...

enum	RttiValues { Rtti_PlotItem = 0, Rtti_PlotGrid, Rtti_PlotScale, Rtti_PlotLegend, Rtti_PlotMarker, Rtti_PlotCurve, Rtti_PlotSpectroCurve, Rtti_PlotIntervalCurve, Rtti_PlotHistogram, Rtti_PlotSpectrogram, Rtti_PlotGraphic, Rtti_PlotTradingCurve, Rtti_PlotBarChart, Rtti_PlotMultiBarChart, Rtti_PlotShape, Rtti_PlotTextLabel, Rtti_PlotZone, Rtti_PlotVectorField, Rtti_PlotUserItem = 1000 }
	Runtime type information. More...

Public Member Functions
virtual QRectF	boundingRect () const QWT_OVERRIDE

const QBrush &	brush () const

virtual void	drawSeries (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const QWT_OVERRIDE

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

const QPen &	pen () const

	QwtPlotIntervalCurve (const QString &title=QString())

	QwtPlotIntervalCurve (const QwtText &title)

virtual int	rtti () const QWT_OVERRIDE

void	setBrush (const QBrush &)

void	setPaintAttribute (PaintAttribute, bool on=true)

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

void	setPen (const QPen &)
	Assign a pen. More...

void	setSamples (const QVector< QwtIntervalSample > &)

void	setSamples (QwtSeriesData< QwtIntervalSample > *)

void	setStyle (CurveStyle style)

void	setSymbol (const QwtIntervalSymbol *)

CurveStyle	style () const

const QwtIntervalSymbol *	symbol () const

bool	testPaintAttribute (PaintAttribute) const

virtual	~QwtPlotIntervalCurve ()
	Destructor. More...

Public Member Functions inherited from QwtPlotSeriesItem
virtual void	draw (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect) const QWT_OVERRIDE
	Draw the complete series. More...

Qt::Orientation	orientation () const

	QwtPlotSeriesItem (const QString &title=QString())

	QwtPlotSeriesItem (const QwtText &title)

void	setOrientation (Qt::Orientation)

virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &) QWT_OVERRIDE
	Update the item to changes of the axes scale division. More...

virtual	~QwtPlotSeriesItem ()
	Destructor. More...

Public Member Functions inherited from QwtPlotItem
void	attach (QwtPlot *plot)
	Attach the item to a plot. More...

void	detach ()
	This method detaches a QwtPlotItem from any QwtPlot it has been associated with. More...

virtual void	getCanvasMarginHint (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, double &left, double &top, double &right, double &bottom) const
	Calculate a hint for the canvas margin. More...

void	hide ()
	Hide the item. More...

bool	isVisible () const

virtual void	itemChanged ()

virtual void	legendChanged ()

virtual QList< QwtLegendData >	legendData () const
	Return all information, that is needed to represent the item on the legend. More...

QSize	legendIconSize () const

QRectF	paintRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the bounding paint rectangle of 2 maps. More...

QwtPlot *	plot () const
	Return attached plot. More...

	QwtPlotItem ()

	QwtPlotItem (const QString &title)

	QwtPlotItem (const QwtText &title)

uint	renderThreadCount () const

QRectF	scaleRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the bounding scale rectangle of 2 maps. More...

void	setAxes (QwtAxisId xAxis, QwtAxisId yAxis)

void	setItemAttribute (ItemAttribute, bool on=true)

void	setItemInterest (ItemInterest, bool on=true)

void	setLegendIconSize (const QSize &)

void	setRenderHint (RenderHint, bool on=true)

void	setRenderThreadCount (uint numThreads)

void	setTitle (const QString &title)

void	setTitle (const QwtText &title)

virtual void	setVisible (bool)

void	setXAxis (QwtAxisId)

void	setYAxis (QwtAxisId)

void	setZ (double z)
	Set the z value. More...

void	show ()
	Show the item. More...

bool	testItemAttribute (ItemAttribute) const

bool	testItemInterest (ItemInterest) const

bool	testRenderHint (RenderHint) const

const QwtText &	title () const

virtual void	updateLegend (const QwtPlotItem *, const QList< QwtLegendData > &)
	Update the item to changes of the legend info. More...

QwtAxisId	xAxis () const
	Return xAxis. More...

QwtAxisId	yAxis () const
	Return yAxis. More...

double	z () const

virtual	~QwtPlotItem ()
	Destroy the QwtPlotItem. More...

Public Member Functions inherited from QwtAbstractSeriesStore
virtual	~QwtAbstractSeriesStore ()
	Destructor. More...

Public Member Functions inherited from QwtSeriesStore< QwtIntervalSample >
QwtSeriesData< QwtIntervalSample > *	data ()

const QwtSeriesData< QwtIntervalSample > *	data () const

virtual QRectF	dataRect () const QWT_OVERRIDE

virtual size_t	dataSize () const QWT_OVERRIDE

	QwtSeriesStore ()
	Constructor The store contains no series. More...

QwtIntervalSample	sample (int index) const

void	setData (QwtSeriesData< QwtIntervalSample > *series)

virtual void	setRectOfInterest (const QRectF &rect) QWT_OVERRIDE

QwtSeriesData< QwtIntervalSample > *	swapData (QwtSeriesData< QwtIntervalSample > *series)

	~QwtSeriesStore ()
	Destructor. More...

Protected Member Functions
virtual void	drawSymbols (QPainter *, const QwtIntervalSymbol &, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const

virtual void	drawTube (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const

void	init ()
	Initialize internal members. More...

Protected Member Functions inherited from QwtPlotSeriesItem
virtual void	dataChanged () QWT_OVERRIDE
	dataChanged() indicates, that the series has been changed. More...

Protected Member Functions inherited from QwtPlotItem
QwtGraphic	defaultIcon (const QBrush &, const QSizeF &) const
	Return a default icon from a brush. More...

Protected Member Functions inherited from QwtAbstractSeriesStore
virtual QRectF	dataRect () const =0

virtual size_t	dataSize () const =0

Private Attributes
PrivateData *	m_data

Detailed Description

QwtPlotIntervalCurve represents a series of samples, where each value is associated with an interval ( $[y1,y2] = f(x)$ ).

The representation depends on the style() and an optional symbol() that is displayed for each interval. QwtPlotIntervalCurve might be used to display error bars or the area between 2 curves.

Definition at line 27 of file qwt_plot_intervalcurve.h.

Member Enumeration Documentation

◆ CurveStyle

enum QwtPlotIntervalCurve::CurveStyle

Curve styles. The default setting is QwtPlotIntervalCurve::Tube.

See also: setStyle(), style()

Enumerator
NoCurve	Don't draw a curve. Note: This doesn't affect the symbols.
Tube	Build 2 curves from the upper and lower limits of the intervals and draw them with the pen(). The area between the curves is filled with the brush().
UserCurve	Styles >= QwtPlotIntervalCurve::UserCurve are reserved for derived classes that overload drawSeries() with additional application specific curve types.

Definition at line 38 of file qwt_plot_intervalcurve.h.

◆ PaintAttribute

enum QwtPlotIntervalCurve::PaintAttribute

Attributes to modify the drawing algorithm.

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.
ClipSymbol	Check if a symbol is on the plot canvas before painting it.

Definition at line 64 of file qwt_plot_intervalcurve.h.

Constructor & Destructor Documentation

◆ QwtPlotIntervalCurve() [1/2]

QwtPlotIntervalCurve::QwtPlotIntervalCurve ( const QString & title = QString() )

explicit

Constructor

Parameters

title Title of the curve

Definition at line 90 of file qwt_plot_intervalcurve.cpp.

◆ QwtPlotIntervalCurve() [2/2]

QwtPlotIntervalCurve::QwtPlotIntervalCurve ( const QwtText & title )

explicit

Constructor

Parameters

title Title of the curve

Definition at line 80 of file qwt_plot_intervalcurve.cpp.

◆ ~QwtPlotIntervalCurve()

QwtPlotIntervalCurve::~QwtPlotIntervalCurve ( )

virtual

Destructor.

Definition at line 97 of file qwt_plot_intervalcurve.cpp.

Member Function Documentation

◆ boundingRect()

QRectF QwtPlotIntervalCurve::boundingRect ( ) const

virtual

Returns: Bounding rectangle of all samples. For an empty series the rectangle is invalid.

Reimplemented from QwtPlotSeriesItem.

Definition at line 300 of file qwt_plot_intervalcurve.cpp.

◆ brush()

const QBrush & QwtPlotIntervalCurve::brush ( ) const

Returns: Brush used to fill the area in Tube style()

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

Definition at line 291 of file qwt_plot_intervalcurve.cpp.

◆ drawSeries()

void QwtPlotIntervalCurve::drawSeries	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const

virtual

Draw a subset of the samples

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 sample to be painted
to	Index of the last sample to be painted. If to < 0 the series will be painted to its last sample.

See also: drawTube(), drawSymbols()

Implements QwtPlotSeriesItem.

Definition at line 322 of file qwt_plot_intervalcurve.cpp.

◆ drawSymbols()

void QwtPlotIntervalCurve::drawSymbols	(	QPainter *	painter,
		const QwtIntervalSymbol &	symbol,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const

protectedvirtual

Draw symbols for a subset of the samples

Parameters

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

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

Definition at line 487 of file qwt_plot_intervalcurve.cpp.

◆ drawTube()

void QwtPlotIntervalCurve::drawTube	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const

protectedvirtual

Draw a tube

Builds 2 curves from the upper and lower limits of the intervals and draws them with the pen(). The area between the curves is filled with the brush().

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 sample to be painted
to	Index of the last sample to be painted. If to < 0 the series will be painted to its last sample.

See also: drawSeries(), drawSymbols()

Definition at line 371 of file qwt_plot_intervalcurve.cpp.

◆ init()

void QwtPlotIntervalCurve::init ( )

protected

Initialize internal members.

Definition at line 103 of file qwt_plot_intervalcurve.cpp.

◆ legendIcon()

QwtGraphic QwtPlotIntervalCurve::legendIcon	(	int	index,
		const QSizeF &	size
	)		const

virtual

Returns: Icon for the legend

In case of Tube style() the icon is a plain rectangle filled with the brush(). If a symbol is assigned it is scaled to size.

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 554 of file qwt_plot_intervalcurve.cpp.

◆ pen()

const QPen & QwtPlotIntervalCurve::pen ( ) const

Returns: Pen used to draw the lines

See also: setPen(), brush()

Definition at line 263 of file qwt_plot_intervalcurve.cpp.

◆ rtti()

int QwtPlotIntervalCurve::rtti ( ) const

virtual

Returns: QwtPlotItem::Rtti_PlotIntervalCurve

Reimplemented from QwtPlotItem.

Definition at line 115 of file qwt_plot_intervalcurve.cpp.

◆ setBrush()

void QwtPlotIntervalCurve::setBrush ( const QBrush & brush )

Assign a brush.

The brush is used to fill the area in Tube style().

Parameters

brush Brush

See also: brush(), pen(), setStyle(), CurveStyle

Definition at line 276 of file qwt_plot_intervalcurve.cpp.

◆ setPaintAttribute()

void QwtPlotIntervalCurve::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 127 of file qwt_plot_intervalcurve.cpp.

◆ setPen() [1/2]

void QwtPlotIntervalCurve::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