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]

List of all members.

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 }
typedef QFlags< PaintAttribute >	PaintAttributes
	Paint attributes.
Public Member Functions
virtual QRectF	boundingRect () const
const QBrush &	brush () const
virtual void	drawSeries (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
virtual QwtGraphic	legendIcon (int index, const QSizeF &) const
const QPen &	pen () const
	QwtPlotIntervalCurve (const QString &title=QString::null)
	QwtPlotIntervalCurve (const QwtText &title)
virtual int	rtti () const
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.
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.
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.
Private Attributes
PrivateData *	d_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 Typedef Documentation

typedef QFlags<PaintAttribute> QwtPlotIntervalCurve::PaintAttributes

Paint attributes.

Definition at line 77 of file qwt_plot_intervalcurve.h.

Member Enumeration Documentation

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 37 of file qwt_plot_intervalcurve.h.

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 63 of file qwt_plot_intervalcurve.h.

Constructor & Destructor Documentation

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

Constructor

Parameters:

title Title of the curve

Definition at line 88 of file qwt_plot_intervalcurve.cpp.

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

Constructor

Parameters:

title Title of the curve

Definition at line 78 of file qwt_plot_intervalcurve.cpp.

QwtPlotIntervalCurve::~QwtPlotIntervalCurve ( ) [virtual]

Destructor.

Definition at line 95 of file qwt_plot_intervalcurve.cpp.

Member Function Documentation

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 298 of file qwt_plot_intervalcurve.cpp.

const QBrush & QwtPlotIntervalCurve::brush ( ) const

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

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

Definition at line 289 of file qwt_plot_intervalcurve.cpp.

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 320 of file qwt_plot_intervalcurve.cpp.

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

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.

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

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 369 of file qwt_plot_intervalcurve.cpp.

void QwtPlotIntervalCurve::init ( ) [protected]

Initialize internal members.

Definition at line 101 of file qwt_plot_intervalcurve.cpp.

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.

const QPen & QwtPlotIntervalCurve::pen ( ) const

Returns:: Pen used to draw the lines

See also:: setPen(), brush()

Definition at line 261 of file qwt_plot_intervalcurve.cpp.

int QwtPlotIntervalCurve::rtti ( ) const [virtual]

Returns:: QwtPlotItem::Rtti_PlotIntervalCurve

Reimplemented from QwtPlotItem.

Definition at line 113 of file qwt_plot_intervalcurve.cpp.

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 274 of file qwt_plot_intervalcurve.cpp.

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 125 of file qwt_plot_intervalcurve.cpp.

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: